Google Git
Sign in
chromium / chromium / src.git / cba8f27f9e77c8b70fabf6538a74b78c503a0ce5 / . / third_party / WebKit / Source / modules / webgl / WebGLRenderingContextBase.cpp
blob: b83b7e3e3e340a0a92121abc3aa84614c119794a [file] [log] [blame]
/*
* Copyright (C) 2009 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "modules/webgl/WebGLRenderingContextBase.h"
#include <memory>
#include "bindings/core/v8/ExceptionMessages.h"
#include "bindings/core/v8/ExceptionState.h"
#include "bindings/core/v8/ScriptWrappableVisitor.h"
#include "bindings/core/v8/V8BindingMacros.h"
#include "bindings/modules/v8/HTMLCanvasElementOrOffscreenCanvas.h"
#include "bindings/modules/v8/WebGLAny.h"
#include "core/dom/DOMArrayBuffer.h"
#include "core/dom/DOMTypedArray.h"
#include "core/dom/FlexibleArrayBufferView.h"
#include "core/dom/TaskRunnerHelper.h"
#include "core/frame/ImageBitmap.h"
#include "core/frame/LocalFrame.h"
#include "core/frame/LocalFrameClient.h"
#include "core/frame/Settings.h"
#include "core/html/HTMLCanvasElement.h"
#include "core/html/HTMLImageElement.h"
#include "core/html/HTMLVideoElement.h"
#include "core/html/ImageData.h"
#include "core/inspector/ConsoleMessage.h"
#include "core/layout/LayoutBox.h"
#include "core/loader/FrameLoader.h"
#include "core/origin_trials/OriginTrials.h"
#include "core/probe/CoreProbes.h"
#include "gpu/command_buffer/client/gles2_interface.h"
#include "modules/webgl/ANGLEInstancedArrays.h"
#include "modules/webgl/EXTBlendMinMax.h"
#include "modules/webgl/EXTFragDepth.h"
#include "modules/webgl/EXTShaderTextureLOD.h"
#include "modules/webgl/EXTTextureFilterAnisotropic.h"
#include "modules/webgl/GLStringQuery.h"
#include "modules/webgl/OESElementIndexUint.h"
#include "modules/webgl/OESStandardDerivatives.h"
#include "modules/webgl/OESTextureFloat.h"
#include "modules/webgl/OESTextureFloatLinear.h"
#include "modules/webgl/OESTextureHalfFloat.h"
#include "modules/webgl/OESTextureHalfFloatLinear.h"
#include "modules/webgl/OESVertexArrayObject.h"
#include "modules/webgl/WebGLActiveInfo.h"
#include "modules/webgl/WebGLBuffer.h"
#include "modules/webgl/WebGLCompressedTextureASTC.h"
#include "modules/webgl/WebGLCompressedTextureATC.h"
#include "modules/webgl/WebGLCompressedTextureETC.h"
#include "modules/webgl/WebGLCompressedTextureETC1.h"
#include "modules/webgl/WebGLCompressedTexturePVRTC.h"
#include "modules/webgl/WebGLCompressedTextureS3TC.h"
#include "modules/webgl/WebGLCompressedTextureS3TCsRGB.h"
#include "modules/webgl/WebGLContextAttributeHelpers.h"
#include "modules/webgl/WebGLContextEvent.h"
#include "modules/webgl/WebGLContextGroup.h"
#include "modules/webgl/WebGLDebugRendererInfo.h"
#include "modules/webgl/WebGLDebugShaders.h"
#include "modules/webgl/WebGLDepthTexture.h"
#include "modules/webgl/WebGLDrawBuffers.h"
#include "modules/webgl/WebGLFramebuffer.h"
#include "modules/webgl/WebGLLoseContext.h"
#include "modules/webgl/WebGLProgram.h"
#include "modules/webgl/WebGLRenderbuffer.h"
#include "modules/webgl/WebGLShader.h"
#include "modules/webgl/WebGLShaderPrecisionFormat.h"
#include "modules/webgl/WebGLUniformLocation.h"
#include "modules/webgl/WebGLVertexArrayObject.h"
#include "modules/webgl/WebGLVertexArrayObjectOES.h"
#include "platform/CrossThreadFunctional.h"
#include "platform/RuntimeEnabledFeatures.h"
#include "platform/WaitableEvent.h"
#include "platform/geometry/IntSize.h"
#include "platform/graphics/GraphicsContext.h"
#include "platform/graphics/UnacceleratedImageBufferSurface.h"
#include "platform/graphics/gpu/AcceleratedImageBufferSurface.h"
#include "platform/graphics/gpu/SharedGpuContext.h"
#include "public/platform/Platform.h"
#include "skia/ext/texture_handle.h"
#include "wtf/CheckedNumeric.h"
#include "wtf/Functional.h"
#include "wtf/PtrUtil.h"
#include "wtf/text/StringBuilder.h"
#include "wtf/text/StringUTF8Adaptor.h"
#include "wtf/typed_arrays/ArrayBufferContents.h"
namespace blink {
namespace {
const double kSecondsBetweenRestoreAttempts = 1.0;
const int kMaxGLErrorsAllowedToConsole = 256;
const unsigned kMaxGLActiveContextsOnWorker = 4;
#if OS(ANDROID)
const unsigned kMaxGLActiveContexts = 8;
#else // OS(ANDROID)
const unsigned kMaxGLActiveContexts = 16;
#endif // OS(ANDROID)
unsigned CurrentMaxGLContexts() {
return IsMainThread() ? kMaxGLActiveContexts : kMaxGLActiveContextsOnWorker;
}
using WebGLRenderingContextBaseSet =
PersistentHeapHashSet<WeakMember<WebGLRenderingContextBase>>;
WebGLRenderingContextBaseSet& ActiveContexts() {
DEFINE_THREAD_SAFE_STATIC_LOCAL(
ThreadSpecific<WebGLRenderingContextBaseSet>, active_contexts,
new ThreadSpecific<WebGLRenderingContextBaseSet>());
if (!active_contexts.IsSet())
active_contexts->RegisterAsStaticReference();
return *active_contexts;
}
using WebGLRenderingContextBaseMap =
PersistentHeapHashMap<WeakMember<WebGLRenderingContextBase>, int>;
WebGLRenderingContextBaseMap& ForciblyEvictedContexts() {
DEFINE_THREAD_SAFE_STATIC_LOCAL(
ThreadSpecific<WebGLRenderingContextBaseMap>, forcibly_evicted_contexts,
new ThreadSpecific<WebGLRenderingContextBaseMap>());
if (!forcibly_evicted_contexts.IsSet())
forcibly_evicted_contexts->RegisterAsStaticReference();
return *forcibly_evicted_contexts;
}
} // namespace
ScopedRGBEmulationColorMask::ScopedRGBEmulationColorMask(
WebGLRenderingContextBase* context,
GLboolean* color_mask,
DrawingBuffer* drawing_buffer)
: context_(context),
requires_emulation_(drawing_buffer->RequiresAlphaChannelToBePreserved()) {
if (requires_emulation_) {
context_->active_scoped_rgb_emulation_color_masks_++;
memcpy(color_mask_, color_mask, 4 * sizeof(GLboolean));
context_->ContextGL()->ColorMask(color_mask_[0], color_mask_[1],
color_mask_[2], false);
}
}
ScopedRGBEmulationColorMask::~ScopedRGBEmulationColorMask() {
if (requires_emulation_) {
DCHECK(context_->active_scoped_rgb_emulation_color_masks_);
context_->active_scoped_rgb_emulation_color_masks_--;
context_->ContextGL()->ColorMask(color_mask_[0], color_mask_[1],
color_mask_[2], color_mask_[3]);
}
}
void WebGLRenderingContextBase::ForciblyLoseOldestContext(
const String& reason) {
WebGLRenderingContextBase* candidate = OldestContext();
if (!candidate)
return;
candidate->PrintWarningToConsole(reason);
probe::didFireWebGLWarning(candidate->canvas());
// This will call deactivateContext once the context has actually been lost.
candidate->ForceLostContext(WebGLRenderingContextBase::kSyntheticLostContext,
WebGLRenderingContextBase::kWhenAvailable);
}
WebGLRenderingContextBase* WebGLRenderingContextBase::OldestContext() {
if (ActiveContexts().IsEmpty())
return nullptr;
WebGLRenderingContextBase* candidate = *(ActiveContexts().begin());
ASSERT(!candidate->isContextLost());
for (WebGLRenderingContextBase* context : ActiveContexts()) {
ASSERT(!context->isContextLost());
if (context->ContextGL()->GetLastFlushIdCHROMIUM() <
candidate->ContextGL()->GetLastFlushIdCHROMIUM()) {
candidate = context;
}
}
return candidate;
}
WebGLRenderingContextBase* WebGLRenderingContextBase::OldestEvictedContext() {
if (ForciblyEvictedContexts().IsEmpty())
return nullptr;
WebGLRenderingContextBase* candidate = nullptr;
int generation = -1;
for (WebGLRenderingContextBase* context : ForciblyEvictedContexts().Keys()) {
if (!candidate || ForciblyEvictedContexts().at(context) < generation) {
candidate = context;
generation = ForciblyEvictedContexts().at(context);
}
}
return candidate;
}
void WebGLRenderingContextBase::ActivateContext(
WebGLRenderingContextBase* context) {
unsigned max_gl_contexts = CurrentMaxGLContexts();
unsigned removed_contexts = 0;
while (ActiveContexts().size() >= max_gl_contexts &&
removed_contexts < max_gl_contexts) {
ForciblyLoseOldestContext(
"WARNING: Too many active WebGL contexts. Oldest context will be "
"lost.");
removed_contexts++;
}
ASSERT(!context->isContextLost());
ActiveContexts().insert(context);
}
void WebGLRenderingContextBase::DeactivateContext(
WebGLRenderingContextBase* context) {
ActiveContexts().erase(context);
}
void WebGLRenderingContextBase::AddToEvictedList(
WebGLRenderingContextBase* context) {
static int generation = 0;
ForciblyEvictedContexts().Set(context, generation++);
}
void WebGLRenderingContextBase::RemoveFromEvictedList(
WebGLRenderingContextBase* context) {
ForciblyEvictedContexts().erase(context);
}
void WebGLRenderingContextBase::RestoreEvictedContext(
WebGLRenderingContextBase* context) {
// These two sets keep weak references to their contexts;
// verify that the GC already removed the |context| entries.
ASSERT(!ForciblyEvictedContexts().Contains(context));
ASSERT(!ActiveContexts().Contains(context));
unsigned max_gl_contexts = CurrentMaxGLContexts();
// Try to re-enable the oldest inactive contexts.
while (ActiveContexts().size() < max_gl_contexts &&
ForciblyEvictedContexts().size()) {
WebGLRenderingContextBase* evicted_context = OldestEvictedContext();
if (!evicted_context->restore_allowed_) {
ForciblyEvictedContexts().erase(evicted_context);
continue;
}
IntSize desired_size = DrawingBuffer::AdjustSize(
evicted_context->ClampedCanvasSize(), IntSize(),
evicted_context->max_texture_size_);
// If there's room in the pixel budget for this context, restore it.
if (!desired_size.IsEmpty()) {
ForciblyEvictedContexts().erase(evicted_context);
evicted_context->ForceRestoreContext();
}
break;
}
}
namespace {
GLint Clamp(GLint value, GLint min, GLint max) {
if (value < min)
value = min;
if (value > max)
value = max;
return value;
}
// Return true if a character belongs to the ASCII subset as defined in
// GLSL ES 1.0 spec section 3.1.
bool ValidateCharacter(unsigned char c) {
// Printing characters are valid except " $ ` @ \ ' DEL.
if (c >= 32 && c <= 126 && c != '"' && c != '$' && c != '`' && c != '@' &&
c != '\\' && c != '\'')
return true;
// Horizontal tab, line feed, vertical tab, form feed, carriage return
// are also valid.
if (c >= 9 && c <= 13)
return true;
return false;
}
bool IsPrefixReserved(const String& name) {
if (name.StartsWith("gl_") || name.StartsWith("webgl_") ||
name.StartsWith("_webgl_"))
return true;
return false;
}
// Strips comments from shader text. This allows non-ASCII characters
// to be used in comments without potentially breaking OpenGL
// implementations not expecting characters outside the GLSL ES set.
class StripComments {
public:
StripComments(const String& str)
: parse_state_(kBeginningOfLine),
source_string_(str),
length_(str.length()),
position_(0) {
Parse();
}
String Result() { return builder_.ToString(); }
private:
bool HasMoreCharacters() const { return (position_ < length_); }
void Parse() {
while (HasMoreCharacters()) {
Process(Current());
// process() might advance the position.
if (HasMoreCharacters())
Advance();
}
}
void Process(UChar);
bool Peek(UChar& character) const {
if (position_ + 1 >= length_)
return false;
character = source_string_[position_ + 1];
return true;
}
UChar Current() {
SECURITY_DCHECK(position_ < length_);
return source_string_[position_];
}
void Advance() { ++position_; }
static bool IsNewline(UChar character) {
// Don't attempt to canonicalize newline related characters.
return (character == '\n' || character == '\r');
}
void Emit(UChar character) { builder_.Append(character); }
enum ParseState {
// Have not seen an ASCII non-whitespace character yet on
// this line. Possible that we might see a preprocessor
// directive.
kBeginningOfLine,
// Have seen at least one ASCII non-whitespace character
// on this line.
kMiddleOfLine,
// Handling a preprocessor directive. Passes through all
// characters up to the end of the line. Disables comment
// processing.
kInPreprocessorDirective,
// Handling a single-line comment. The comment text is
// replaced with a single space.
kInSingleLineComment,
// Handling a multi-line comment. Newlines are passed
// through to preserve line numbers.
kInMultiLineComment
};
ParseState parse_state_;
String source_string_;
unsigned length_;
unsigned position_;
StringBuilder builder_;
};
void StripComments::Process(UChar c) {
if (IsNewline(c)) {
// No matter what state we are in, pass through newlines
// so we preserve line numbers.
Emit(c);
if (parse_state_ != kInMultiLineComment)
parse_state_ = kBeginningOfLine;
return;
}
UChar temp = 0;
switch (parse_state_) {
case kBeginningOfLine:
if (WTF::IsASCIISpace(c)) {
Emit(c);
break;
}
if (c == '#') {
parse_state_ = kInPreprocessorDirective;
Emit(c);
break;
}
// Transition to normal state and re-handle character.
parse_state_ = kMiddleOfLine;
Process(c);
break;
case kMiddleOfLine:
if (c == '/' && Peek(temp)) {
if (temp == '/') {
parse_state_ = kInSingleLineComment;
Emit(' ');
Advance();
break;
}
if (temp == '*') {
parse_state_ = kInMultiLineComment;
// Emit the comment start in case the user has
// an unclosed comment and we want to later
// signal an error.
Emit('/');
Emit('*');
Advance();
break;
}
}
Emit(c);
break;
case kInPreprocessorDirective:
// No matter what the character is, just pass it
// through. Do not parse comments in this state. This
// might not be the right thing to do long term, but it
// should handle the #error preprocessor directive.
Emit(c);
break;
case kInSingleLineComment:
// Line-continuation characters are processed before comment processing.
// Advance string if a new line character is immediately behind
// line-continuation character.
if (c == '\\') {
if (Peek(temp) && IsNewline(temp))
Advance();
}
// The newline code at the top of this function takes care
// of resetting our state when we get out of the
// single-line comment. Swallow all other characters.
break;
case kInMultiLineComment:
if (c == '*' && Peek(temp) && temp == '/') {
Emit('*');
Emit('/');
parse_state_ = kMiddleOfLine;
Advance();
break;
}
// Swallow all other characters. Unclear whether we may
// want or need to just emit a space per character to try
// to preserve column numbers for debugging purposes.
break;
}
}
static bool g_should_fail_context_creation_for_testing = false;
} // namespace
class ScopedTexture2DRestorer {
STACK_ALLOCATED();
public:
explicit ScopedTexture2DRestorer(WebGLRenderingContextBase* context)
: context_(context) {}
~ScopedTexture2DRestorer() { context_->RestoreCurrentTexture2D(); }
private:
Member<WebGLRenderingContextBase> context_;
};
class ScopedFramebufferRestorer {
STACK_ALLOCATED();
public:
explicit ScopedFramebufferRestorer(WebGLRenderingContextBase* context)
: context_(context) {}
~ScopedFramebufferRestorer() { context_->RestoreCurrentFramebuffer(); }
private:
Member<WebGLRenderingContextBase> context_;
};
class ScopedUnpackParametersResetRestore {
STACK_ALLOCATED();
public:
explicit ScopedUnpackParametersResetRestore(
WebGLRenderingContextBase* context,
bool enabled = true)
: context_(context), enabled_(enabled) {
if (enabled)
context_->ResetUnpackParameters();
}
~ScopedUnpackParametersResetRestore() {
if (enabled_)
context_->RestoreUnpackParameters();
}
private:
Member<WebGLRenderingContextBase> context_;
bool enabled_;
};
static void FormatWebGLStatusString(const StringView& gl_info,
const StringView& info_string,
StringBuilder& builder) {
if (info_string.IsEmpty())
return;
builder.Append(", ");
builder.Append(gl_info);
builder.Append(" = ");
builder.Append(info_string);
}
static String ExtractWebGLContextCreationError(
const Platform::GraphicsInfo& info) {
StringBuilder builder;
builder.Append("Could not create a WebGL context");
FormatWebGLStatusString(
"VENDOR",
info.vendor_id ? String::Format("0x%04x", info.vendor_id) : "0xffff",
builder);
FormatWebGLStatusString(
"DEVICE",
info.device_id ? String::Format("0x%04x", info.device_id) : "0xffff",
builder);
FormatWebGLStatusString("GL_VENDOR", info.vendor_info, builder);
FormatWebGLStatusString("GL_RENDERER", info.renderer_info, builder);
FormatWebGLStatusString("GL_VERSION", info.driver_version, builder);
FormatWebGLStatusString("Sandboxed", info.sandboxed ? "yes" : "no", builder);
FormatWebGLStatusString("Optimus", info.optimus ? "yes" : "no", builder);
FormatWebGLStatusString("AMD switchable", info.amd_switchable ? "yes" : "no",
builder);
FormatWebGLStatusString(
"Reset notification strategy",
String::Format("0x%04x", info.reset_notification_strategy).Utf8().Data(),
builder);
FormatWebGLStatusString("GPU process crash count",
String::Number(info.process_crash_count), builder);
FormatWebGLStatusString("ErrorMessage", info.error_message.Utf8().data(),
builder);
builder.Append('.');
return builder.ToString();
}
struct ContextProviderCreationInfo {
// Inputs.
Platform::ContextAttributes context_attributes;
Platform::GraphicsInfo* gl_info;
KURL url;
// Outputs.
std::unique_ptr<WebGraphicsContext3DProvider> created_context_provider;
};
static void CreateContextProviderOnMainThread(
ContextProviderCreationInfo* creation_info,
WaitableEvent* waitable_event) {
ASSERT(IsMainThread());
creation_info->created_context_provider = WTF::WrapUnique(
Platform::Current()->CreateOffscreenGraphicsContext3DProvider(
creation_info->context_attributes, creation_info->url, 0,
creation_info->gl_info));
waitable_event->Signal();
}
static std::unique_ptr<WebGraphicsContext3DProvider>
CreateContextProviderOnWorkerThread(
Platform::ContextAttributes context_attributes,
Platform::GraphicsInfo* gl_info,
const KURL& url) {
WaitableEvent waitable_event;
ContextProviderCreationInfo creation_info;
creation_info.context_attributes = context_attributes;
creation_info.gl_info = gl_info;
creation_info.url = url.Copy();
RefPtr<WebTaskRunner> task_runner =
Platform::Current()->MainThread()->GetWebTaskRunner();
task_runner->PostTask(
BLINK_FROM_HERE, CrossThreadBind(&CreateContextProviderOnMainThread,
CrossThreadUnretained(&creation_info),
CrossThreadUnretained(&waitable_event)));
waitable_event.Wait();
return std::move(creation_info.created_context_provider);
}
bool WebGLRenderingContextBase::SupportOwnOffscreenSurface(
ExecutionContext* execution_context) {
// If there's a possibility this context may be used with WebVR make sure it
// is created with an offscreen surface that can be swapped out for a
// VR-specific surface if needed.
//
// At this time, treat this as an experimental rendering optimization
// that needs a separate opt-in. See crbug.com/691102 for details.
if (RuntimeEnabledFeatures::webVRExperimentalRenderingEnabled()) {
if (RuntimeEnabledFeatures::webVREnabled() ||
OriginTrials::webVREnabled(execution_context)) {
DVLOG(1) << "Requesting supportOwnOffscreenSurface";
return true;
}
}
return false;
}
std::unique_ptr<WebGraphicsContext3DProvider>
WebGLRenderingContextBase::CreateContextProviderInternal(
HTMLCanvasElement* canvas,
ScriptState* script_state,
const CanvasContextCreationAttributes& attributes,
unsigned web_gl_version) {
// Exactly one of these must be provided.
DCHECK_EQ(!canvas, !!script_state);
// The canvas is only given on the main thread.
DCHECK(!canvas || IsMainThread());
auto execution_context = canvas ? canvas->GetDocument().GetExecutionContext()
: script_state->GetExecutionContext();
Platform::ContextAttributes context_attributes = ToPlatformContextAttributes(
attributes, web_gl_version,
SupportOwnOffscreenSurface(execution_context));
Platform::GraphicsInfo gl_info;
std::unique_ptr<WebGraphicsContext3DProvider> context_provider;
const auto& url = canvas ? canvas->GetDocument().TopDocument().Url()
: script_state->GetExecutionContext()->Url();
if (IsMainThread()) {
context_provider = WTF::WrapUnique(
Platform::Current()->CreateOffscreenGraphicsContext3DProvider(
context_attributes, url, 0, &gl_info));
} else {
context_provider =
CreateContextProviderOnWorkerThread(context_attributes, &gl_info, url);
}
if (context_provider && !context_provider->BindToCurrentThread()) {
context_provider = nullptr;
gl_info.error_message =
String("bindToCurrentThread failed: " + String(gl_info.error_message));
}
if (!context_provider || g_should_fail_context_creation_for_testing) {
g_should_fail_context_creation_for_testing = false;
if (canvas)
canvas->DispatchEvent(WebGLContextEvent::Create(
EventTypeNames::webglcontextcreationerror, false, true,
ExtractWebGLContextCreationError(gl_info)));
return nullptr;
}
gpu::gles2::GLES2Interface* gl = context_provider->ContextGL();
if (!String(gl->GetString(GL_EXTENSIONS))
.Contains("GL_OES_packed_depth_stencil")) {
if (canvas)
canvas->DispatchEvent(WebGLContextEvent::Create(
EventTypeNames::webglcontextcreationerror, false, true,
"OES_packed_depth_stencil support is required."));
return nullptr;
}
return context_provider;
}
std::unique_ptr<WebGraphicsContext3DProvider>
WebGLRenderingContextBase::CreateWebGraphicsContext3DProvider(
HTMLCanvasElement* canvas,
const CanvasContextCreationAttributes& attributes,
unsigned web_gl_version) {
Document& document = canvas->GetDocument();
LocalFrame* frame = document.GetFrame();
if (!frame) {
canvas->DispatchEvent(WebGLContextEvent::Create(
EventTypeNames::webglcontextcreationerror, false, true,
"Web page was not allowed to create a WebGL context."));
return nullptr;
}
Settings* settings = frame->GetSettings();
// The LocalFrameClient might block creation of a new WebGL context despite
// the page settings; in particular, if WebGL contexts were lost one or more
// times via the GL_ARB_robustness extension.
if (!frame->Loader().Client()->AllowWebGL(settings &&
settings->GetWebGLEnabled())) {
canvas->DispatchEvent(WebGLContextEvent::Create(
EventTypeNames::webglcontextcreationerror, false, true,
"Web page was not allowed to create a WebGL context."));
return nullptr;
}
return CreateContextProviderInternal(canvas, nullptr, attributes,
web_gl_version);
}
std::unique_ptr<WebGraphicsContext3DProvider>
WebGLRenderingContextBase::CreateWebGraphicsContext3DProvider(
ScriptState* script_state,
const CanvasContextCreationAttributes& attributes,
unsigned web_gl_version) {
return CreateContextProviderInternal(nullptr, script_state, attributes,
web_gl_version);
}
void WebGLRenderingContextBase::ForceNextWebGLContextCreationToFail() {
g_should_fail_context_creation_for_testing = true;
}
ImageBitmap* WebGLRenderingContextBase::TransferToImageBitmapBase(
ScriptState* script_state) {
UseCounter::Feature feature =
UseCounter::kOffscreenCanvasTransferToImageBitmapWebGL;
UseCounter::Count(script_state->GetExecutionContext(), feature);
if (!GetDrawingBuffer())
return nullptr;
return ImageBitmap::Create(GetDrawingBuffer()->TransferToStaticBitmapImage());
}
ScriptPromise WebGLRenderingContextBase::commit(
ScriptState* script_state,
ExceptionState& exception_state) {
UseCounter::Feature feature = UseCounter::kOffscreenCanvasCommitWebGL;
UseCounter::Count(script_state->GetExecutionContext(), feature);
if (!offscreenCanvas()) {
exception_state.ThrowDOMException(kInvalidStateError,
"Commit() was called on a rendering "
"context that was not created from an "
"OffscreenCanvas.");
return exception_state.Reject(script_state);
}
// no HTMLCanvas associated, thrown InvalidStateError
if (!offscreenCanvas()->HasPlaceholderCanvas()) {
exception_state.ThrowDOMException(
kInvalidStateError,
"Commit() was called on a context whose "
"OffscreenCanvas is not associated with a "
"canvas element.");
return exception_state.Reject(script_state);
}
if (!GetDrawingBuffer()) {
return offscreenCanvas()->Commit(nullptr, false, script_state);
}
RefPtr<StaticBitmapImage> image;
if (CreationAttributes().preserveDrawingBuffer()) {
int width = GetDrawingBuffer()->size().Width();
int height = GetDrawingBuffer()->size().Height();
SkImageInfo image_info =
SkImageInfo::Make(width, height, kRGBA_8888_SkColorType,
CreationAttributes().alpha() ? kPremul_SkAlphaType
: kOpaque_SkAlphaType);
image = StaticBitmapImage::Create(MakeImageSnapshot(image_info));
} else {
image = GetDrawingBuffer()->TransferToStaticBitmapImage();
}
return offscreenCanvas()->Commit(
std::move(image),
GetDrawingBuffer()->ContextProvider()->IsSoftwareRendering(),
script_state);
}
PassRefPtr<Image> WebGLRenderingContextBase::GetImage(
AccelerationHint hint,
SnapshotReason reason) const {
if (!GetDrawingBuffer())
return nullptr;
GetDrawingBuffer()->ResolveAndBindForReadAndDraw();
IntSize size = ClampedCanvasSize();
OpacityMode opacity_mode =
CreationAttributes().hasAlpha() ? kNonOpaque : kOpaque;
std::unique_ptr<AcceleratedImageBufferSurface> surface =
WTF::MakeUnique<AcceleratedImageBufferSurface>(size, opacity_mode);
if (!surface->IsValid())
return nullptr;
std::unique_ptr<ImageBuffer> buffer = ImageBuffer::Create(std::move(surface));
if (!buffer->CopyRenderingResultsFromDrawingBuffer(GetDrawingBuffer(),
kBackBuffer)) {
// copyRenderingResultsFromDrawingBuffer is expected to always succeed
// because we've explicitly created an Accelerated surface and have already
// validated it.
NOTREACHED();
return nullptr;
}
return buffer->NewImageSnapshot(hint, reason);
}
sk_sp<SkImage> WebGLRenderingContextBase::MakeImageSnapshot(
SkImageInfo& image_info) {
GetDrawingBuffer()->ResolveAndBindForReadAndDraw();
gpu::gles2::GLES2Interface* gl = SharedGpuContext::Gl();
SkSurfaceProps disable_lcd_props(0, kUnknown_SkPixelGeometry);
sk_sp<SkSurface> surface = SkSurface::MakeRenderTarget(
SharedGpuContext::Gr(), SkBudgeted::kYes, image_info, 0,
image_info.alphaType() == kOpaque_SkAlphaType ? nullptr
: &disable_lcd_props);
const GrGLTextureInfo* texture_info = skia::GrBackendObjectToGrGLTextureInfo(
surface->getTextureHandle(SkSurface::kDiscardWrite_TextureHandleAccess));
GLuint texture_id = texture_info->fID;
GLenum texture_target = texture_info->fTarget;
GetDrawingBuffer()->CopyToPlatformTexture(
gl, texture_target, texture_id, true, false, IntPoint(0, 0),
IntRect(IntPoint(0, 0), GetDrawingBuffer()->size()), kBackBuffer);
return surface->makeImageSnapshot();
}
ImageData* WebGLRenderingContextBase::ToImageData(SnapshotReason reason) {
ImageData* image_data = nullptr;
// TODO(ccameron): WebGL should produce sRGB images.
// https://crbug.com/672299
if (GetDrawingBuffer()) {
// For un-premultiplied data
image_data = PaintRenderingResultsToImageData(kBackBuffer);
if (image_data) {
return image_data;
}
int width = GetDrawingBuffer()->size().Width();
int height = GetDrawingBuffer()->size().Height();
SkImageInfo image_info =
SkImageInfo::Make(width, height, kRGBA_8888_SkColorType,
CreationAttributes().alpha() ? kPremul_SkAlphaType
: kOpaque_SkAlphaType);
sk_sp<SkImage> snapshot = MakeImageSnapshot(image_info);
if (snapshot) {
image_data = ImageData::Create(GetDrawingBuffer()->size());
snapshot->readPixels(image_info, image_data->data()->Data(),
image_info.minRowBytes(), 0, 0);
}
}
return image_data;
}
namespace {
// Exposed by GL_ANGLE_depth_texture
static const GLenum kSupportedInternalFormatsOESDepthTex[] = {
GL_DEPTH_COMPONENT, GL_DEPTH_STENCIL,
};
// Exposed by GL_EXT_sRGB
static const GLenum kSupportedInternalFormatsEXTsRGB[] = {
GL_SRGB, GL_SRGB_ALPHA_EXT,
};
// ES3 enums supported by both CopyTexImage and TexImage.
static const GLenum kSupportedInternalFormatsES3[] = {
GL_R8, GL_RG8, GL_RGB565, GL_RGB8, GL_RGBA4,
GL_RGB5_A1, GL_RGBA8, GL_RGB10_A2, GL_RGB10_A2UI, GL_SRGB8,
GL_SRGB8_ALPHA8, GL_R8I, GL_R8UI, GL_R16I, GL_R16UI,
GL_R32I, GL_R32UI, GL_RG8I, GL_RG8UI, GL_RG16I,
GL_RG16UI, GL_RG32I, GL_RG32UI, GL_RGBA8I, GL_RGBA8UI,
GL_RGBA16I, GL_RGBA16UI, GL_RGBA32I, GL_RGBA32UI,
};
// ES3 enums only supported by TexImage
static const GLenum kSupportedInternalFormatsTexImageES3[] = {
GL_R8_SNORM,
GL_R16F,
GL_R32F,
GL_RG8_SNORM,
GL_RG16F,
GL_RG32F,
GL_RGB8_SNORM,
GL_R11F_G11F_B10F,
GL_RGB9_E5,
GL_RGB16F,
GL_RGB32F,
GL_RGB8UI,
GL_RGB8I,
GL_RGB16UI,
GL_RGB16I,
GL_RGB32UI,
GL_RGB32I,
GL_RGBA8_SNORM,
GL_RGBA16F,
GL_RGBA32F,
GL_DEPTH_COMPONENT16,
GL_DEPTH_COMPONENT24,
GL_DEPTH_COMPONENT32F,
GL_DEPTH24_STENCIL8,
GL_DEPTH32F_STENCIL8,
};
// ES3 enums supported by TexImageSource
static const GLenum kSupportedInternalFormatsTexImageSourceES3[] = {
GL_R8, GL_R16F, GL_R32F, GL_R8UI, GL_RG8,
GL_RG16F, GL_RG32F, GL_RG8UI, GL_RGB8, GL_SRGB8,
GL_RGB565, GL_R11F_G11F_B10F, GL_RGB9_E5, GL_RGB16F, GL_RGB32F,
GL_RGB8UI, GL_RGBA8, GL_SRGB8_ALPHA8, GL_RGB5_A1, GL_RGBA4,
GL_RGBA16F, GL_RGBA32F, GL_RGBA8UI,
};
// ES2 enums
// Internalformat must equal format in ES2.
static const GLenum kSupportedFormatsES2[] = {
GL_RGB, GL_RGBA, GL_LUMINANCE_ALPHA, GL_LUMINANCE, GL_ALPHA,
};
// Exposed by GL_ANGLE_depth_texture
static const GLenum kSupportedFormatsOESDepthTex[] = {
GL_DEPTH_COMPONENT, GL_DEPTH_STENCIL,
};
// Exposed by GL_EXT_sRGB
static const GLenum kSupportedFormatsEXTsRGB[] = {
GL_SRGB, GL_SRGB_ALPHA_EXT,
};
// ES3 enums
static const GLenum kSupportedFormatsES3[] = {
GL_RED, GL_RED_INTEGER, GL_RG,
GL_RG_INTEGER, GL_RGB, GL_RGB_INTEGER,
GL_RGBA, GL_RGBA_INTEGER, GL_DEPTH_COMPONENT,
GL_DEPTH_STENCIL,
};
// ES3 enums supported by TexImageSource
static const GLenum kSupportedFormatsTexImageSourceES3[] = {
GL_RED, GL_RED_INTEGER, GL_RG, GL_RG_INTEGER,
GL_RGB, GL_RGB_INTEGER, GL_RGBA, GL_RGBA_INTEGER,
};
// ES2 enums
static const GLenum kSupportedTypesES2[] = {
GL_UNSIGNED_BYTE, GL_UNSIGNED_SHORT_5_6_5, GL_UNSIGNED_SHORT_4_4_4_4,
GL_UNSIGNED_SHORT_5_5_5_1,
};
// Exposed by GL_OES_texture_float
static const GLenum kSupportedTypesOESTexFloat[] = {
GL_FLOAT,
};
// Exposed by GL_OES_texture_half_float
static const GLenum kSupportedTypesOESTexHalfFloat[] = {
GL_HALF_FLOAT_OES,
};
// Exposed by GL_ANGLE_depth_texture
static const GLenum kSupportedTypesOESDepthTex[] = {
GL_UNSIGNED_SHORT, GL_UNSIGNED_INT, GL_UNSIGNED_INT_24_8,
};
// ES3 enums
static const GLenum kSupportedTypesES3[] = {
GL_BYTE,
GL_UNSIGNED_SHORT,
GL_SHORT,
GL_UNSIGNED_INT,
GL_INT,
GL_HALF_FLOAT,
GL_FLOAT,
GL_UNSIGNED_INT_2_10_10_10_REV,
GL_UNSIGNED_INT_10F_11F_11F_REV,
GL_UNSIGNED_INT_5_9_9_9_REV,
GL_UNSIGNED_INT_24_8,
GL_FLOAT_32_UNSIGNED_INT_24_8_REV,
};
// ES3 enums supported by TexImageSource
static const GLenum kSupportedTypesTexImageSourceES3[] = {
GL_HALF_FLOAT, GL_FLOAT, GL_UNSIGNED_INT_10F_11F_11F_REV,
};
} // namespace
WebGLRenderingContextBase::WebGLRenderingContextBase(
OffscreenCanvas* passed_offscreen_canvas,
std::unique_ptr<WebGraphicsContext3DProvider> context_provider,
const CanvasContextCreationAttributes& requested_attributes,
unsigned version)
: WebGLRenderingContextBase(
nullptr,
passed_offscreen_canvas,
TaskRunnerHelper::Get(TaskType::kWebGL,
passed_offscreen_canvas->GetExecutionContext()),
std::move(context_provider),
requested_attributes,
version) {}
WebGLRenderingContextBase::WebGLRenderingContextBase(
HTMLCanvasElement* passed_canvas,
std::unique_ptr<WebGraphicsContext3DProvider> context_provider,
const CanvasContextCreationAttributes& requested_attributes,
unsigned version)
: WebGLRenderingContextBase(
passed_canvas,
nullptr,
TaskRunnerHelper::Get(TaskType::kWebGL,
&passed_canvas->GetDocument()),
std::move(context_provider),
requested_attributes,
version) {}
WebGLRenderingContextBase::WebGLRenderingContextBase(
HTMLCanvasElement* passed_canvas,
OffscreenCanvas* passed_offscreen_canvas,
RefPtr<WebTaskRunner> task_runner,
std::unique_ptr<WebGraphicsContext3DProvider> context_provider,
const CanvasContextCreationAttributes& requested_attributes,
unsigned version)
: CanvasRenderingContext(passed_canvas,
passed_offscreen_canvas,
requested_attributes),
context_group_(this, new WebGLContextGroup()),
is_hidden_(false),
context_lost_mode_(kNotLostContext),
auto_recovery_method_(kManual),
dispatch_context_lost_event_timer_(
task_runner,
this,
&WebGLRenderingContextBase::DispatchContextLostEvent),
restore_allowed_(false),
restore_timer_(task_runner,
this,
&WebGLRenderingContextBase::MaybeRestoreContext),
bound_array_buffer_(this, nullptr),
bound_vertex_array_object_(this, nullptr),
current_program_(this, nullptr),
framebuffer_binding_(this, nullptr),
renderbuffer_binding_(this, nullptr),
generated_image_cache_(4),
synthesized_errors_to_console_(true),
num_gl_errors_to_console_allowed_(kMaxGLErrorsAllowedToConsole),
one_plus_max_non_default_texture_unit_(0),
is_web_gl2_formats_types_added_(false),
is_web_gl2_tex_image_source_formats_types_added_(false),
is_web_gl2_internal_formats_copy_tex_image_added_(false),
is_oes_texture_float_formats_types_added_(false),
is_oes_texture_half_float_formats_types_added_(false),
is_web_gl_depth_texture_formats_types_added_(false),
is_ex_ts_rgb_formats_types_added_(false),
version_(version) {
ASSERT(context_provider);
context_group_->AddContext(this);
max_viewport_dims_[0] = max_viewport_dims_[1] = 0;
context_provider->ContextGL()->GetIntegerv(GL_MAX_VIEWPORT_DIMS,
max_viewport_dims_);
RefPtr<DrawingBuffer> buffer;
// On Mac OS, DrawingBuffer is using an IOSurface as its backing storage, this
// allows WebGL-rendered canvases to be composited by the OS rather than
// Chrome.
// IOSurfaces are only compatible with the GL_TEXTURE_RECTANGLE_ARB binding
// target. So to avoid the knowledge of GL_TEXTURE_RECTANGLE_ARB type textures
// being introduced into more areas of the code, we use the code path of
// non-WebGLImageChromium for OffscreenCanvas.
// See detailed discussion in crbug.com/649668.
if (passed_offscreen_canvas)
buffer = CreateDrawingBuffer(std::move(context_provider),
DrawingBuffer::kDisallowChromiumImage);
else
buffer = CreateDrawingBuffer(std::move(context_provider),
DrawingBuffer::kAllowChromiumImage);
if (!buffer) {
context_lost_mode_ = kSyntheticLostContext;
return;
}
drawing_buffer_ = buffer.Release();
drawing_buffer_->AddNewMailboxCallback(
WTF::Bind(&WebGLRenderingContextBase::NotifyCanvasContextChanged,
WrapWeakPersistent(this)));
GetDrawingBuffer()->Bind(GL_FRAMEBUFFER);
SetupFlags();
#define ADD_VALUES_TO_SET(set, values) \
for (size_t i = 0; i < WTF_ARRAY_LENGTH(values); ++i) { \
set.insert(values[i]); \
}
ADD_VALUES_TO_SET(supported_internal_formats_, kSupportedFormatsES2);
ADD_VALUES_TO_SET(supported_tex_image_source_internal_formats_,
kSupportedFormatsES2);
ADD_VALUES_TO_SET(supported_internal_formats_copy_tex_image_,
kSupportedFormatsES2);
ADD_VALUES_TO_SET(supported_formats_, kSupportedFormatsES2);
ADD_VALUES_TO_SET(supported_tex_image_source_formats_, kSupportedFormatsES2);
ADD_VALUES_TO_SET(supported_types_, kSupportedTypesES2);
ADD_VALUES_TO_SET(supported_tex_image_source_types_, kSupportedTypesES2);
}
PassRefPtr<DrawingBuffer> WebGLRenderingContextBase::CreateDrawingBuffer(
std::unique_ptr<WebGraphicsContext3DProvider> context_provider,
DrawingBuffer::ChromiumImageUsage chromium_image_usage) {
bool premultiplied_alpha = CreationAttributes().premultipliedAlpha();
bool want_alpha_channel = CreationAttributes().alpha();
bool want_depth_buffer = CreationAttributes().depth();
bool want_stencil_buffer = CreationAttributes().stencil();
bool want_antialiasing = CreationAttributes().antialias();
DrawingBuffer::PreserveDrawingBuffer preserve =
CreationAttributes().preserveDrawingBuffer() ? DrawingBuffer::kPreserve
: DrawingBuffer::kDiscard;
DrawingBuffer::WebGLVersion web_gl_version = DrawingBuffer::kWebGL1;
if (Version() == 1) {
web_gl_version = DrawingBuffer::kWebGL1;
} else if (Version() == 2) {
web_gl_version = DrawingBuffer::kWebGL2;
} else {
NOTREACHED();
}
return DrawingBuffer::Create(std::move(context_provider), this,
ClampedCanvasSize(), premultiplied_alpha,
want_alpha_channel, want_depth_buffer,
want_stencil_buffer, want_antialiasing, preserve,
web_gl_version, chromium_image_usage);
}
void WebGLRenderingContextBase::InitializeNewContext() {
ASSERT(!isContextLost());
ASSERT(GetDrawingBuffer());
marked_canvas_dirty_ = false;
animation_frame_in_progress_ = false;
active_texture_unit_ = 0;
pack_alignment_ = 4;
unpack_alignment_ = 4;
unpack_flip_y_ = false;
unpack_premultiply_alpha_ = false;
unpack_colorspace_conversion_ = GC3D_BROWSER_DEFAULT_WEBGL;
bound_array_buffer_ = nullptr;
current_program_ = nullptr;
framebuffer_binding_ = nullptr;
renderbuffer_binding_ = nullptr;
depth_mask_ = true;
stencil_enabled_ = false;
stencil_mask_ = 0xFFFFFFFF;
stencil_mask_back_ = 0xFFFFFFFF;
stencil_func_ref_ = 0;
stencil_func_ref_back_ = 0;
stencil_func_mask_ = 0xFFFFFFFF;
stencil_func_mask_back_ = 0xFFFFFFFF;
num_gl_errors_to_console_allowed_ = kMaxGLErrorsAllowedToConsole;
clear_color_[0] = clear_color_[1] = clear_color_[2] = clear_color_[3] = 0;
scissor_enabled_ = false;
clear_depth_ = 1;
clear_stencil_ = 0;
color_mask_[0] = color_mask_[1] = color_mask_[2] = color_mask_[3] = true;
GLint num_combined_texture_image_units = 0;
ContextGL()->GetIntegerv(GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS,
&num_combined_texture_image_units);
texture_units_.Clear();
texture_units_.Resize(num_combined_texture_image_units);
GLint num_vertex_attribs = 0;
ContextGL()->GetIntegerv(GL_MAX_VERTEX_ATTRIBS, &num_vertex_attribs);
max_vertex_attribs_ = num_vertex_attribs;
max_texture_size_ = 0;
ContextGL()->GetIntegerv(GL_MAX_TEXTURE_SIZE, &max_texture_size_);
max_texture_level_ =
WebGLTexture::ComputeLevelCount(max_texture_size_, max_texture_size_, 1);
max_cube_map_texture_size_ = 0;
ContextGL()->GetIntegerv(GL_MAX_CUBE_MAP_TEXTURE_SIZE,
&max_cube_map_texture_size_);
max3d_texture_size_ = 0;
max3d_texture_level_ = 0;
max_array_texture_layers_ = 0;
if (IsWebGL2OrHigher()) {
ContextGL()->GetIntegerv(GL_MAX_3D_TEXTURE_SIZE, &max3d_texture_size_);
max3d_texture_level_ = WebGLTexture::ComputeLevelCount(
max3d_texture_size_, max3d_texture_size_, max3d_texture_size_);
ContextGL()->GetIntegerv(GL_MAX_ARRAY_TEXTURE_LAYERS,
&max_array_texture_layers_);
}
max_cube_map_texture_level_ = WebGLTexture::ComputeLevelCount(
max_cube_map_texture_size_, max_cube_map_texture_size_, 1);
max_renderbuffer_size_ = 0;
ContextGL()->GetIntegerv(GL_MAX_RENDERBUFFER_SIZE, &max_renderbuffer_size_);
// These two values from EXT_draw_buffers are lazily queried.
max_draw_buffers_ = 0;
max_color_attachments_ = 0;
back_draw_buffer_ = GL_BACK;
read_buffer_of_default_framebuffer_ = GL_BACK;
default_vertex_array_object_ = WebGLVertexArrayObject::Create(
this, WebGLVertexArrayObjectBase::kVaoTypeDefault);
bound_vertex_array_object_ = default_vertex_array_object_;
vertex_attrib_type_.Resize(max_vertex_attribs_);
ContextGL()->Viewport(0, 0, drawingBufferWidth(), drawingBufferHeight());
scissor_box_[0] = scissor_box_[1] = 0;
scissor_box_[2] = drawingBufferWidth();
scissor_box_[3] = drawingBufferHeight();
ContextGL()->Scissor(scissor_box_[0], scissor_box_[1], scissor_box_[2],
scissor_box_[3]);
GetDrawingBuffer()->ContextProvider()->SetLostContextCallback(
ConvertToBaseCallback(WTF::Bind(
&WebGLRenderingContextBase::ForceLostContext,
WrapWeakPersistent(this), WebGLRenderingContextBase::kRealLostContext,
WebGLRenderingContextBase::kAuto)));
GetDrawingBuffer()->ContextProvider()->SetErrorMessageCallback(
ConvertToBaseCallback(
WTF::Bind(&WebGLRenderingContextBase::OnErrorMessage,
WrapWeakPersistent(this))));
// If WebGL 2, the PRIMITIVE_RESTART_FIXED_INDEX should be always enabled.
// See the section <Primitive Restart is Always Enabled> in WebGL 2 spec:
// https://www.khronos.org/registry/webgl/specs/latest/2.0/#4.1.4
if (IsWebGL2OrHigher())
ContextGL()->Enable(GL_PRIMITIVE_RESTART_FIXED_INDEX);
// This ensures that the context has a valid "lastFlushID" and won't be
// mistakenly identified as the "least recently used" context.
ContextGL()->Flush();
for (int i = 0; i < kWebGLExtensionNameCount; ++i)
extension_enabled_[i] = false;
is_web_gl2_formats_types_added_ = false;
is_web_gl2_tex_image_source_formats_types_added_ = false;
is_web_gl2_internal_formats_copy_tex_image_added_ = false;
is_oes_texture_float_formats_types_added_ = false;
is_oes_texture_half_float_formats_types_added_ = false;
is_web_gl_depth_texture_formats_types_added_ = false;
is_ex_ts_rgb_formats_types_added_ = false;
supported_internal_formats_.clear();
ADD_VALUES_TO_SET(supported_internal_formats_, kSupportedFormatsES2);
supported_tex_image_source_internal_formats_.clear();
ADD_VALUES_TO_SET(supported_tex_image_source_internal_formats_,
kSupportedFormatsES2);
supported_internal_formats_copy_tex_image_.clear();
ADD_VALUES_TO_SET(supported_internal_formats_copy_tex_image_,
kSupportedFormatsES2);
supported_formats_.clear();
ADD_VALUES_TO_SET(supported_formats_, kSupportedFormatsES2);
supported_tex_image_source_formats_.clear();
ADD_VALUES_TO_SET(supported_tex_image_source_formats_, kSupportedFormatsES2);
supported_types_.clear();
ADD_VALUES_TO_SET(supported_types_, kSupportedTypesES2);
supported_tex_image_source_types_.clear();
ADD_VALUES_TO_SET(supported_tex_image_source_types_, kSupportedTypesES2);
// The DrawingBuffer was unable to store the state that dirtied when it was
// initialized. Restore it now.
GetDrawingBuffer()->RestoreAllState();
ActivateContext(this);
}
void WebGLRenderingContextBase::SetupFlags() {
ASSERT(GetDrawingBuffer());
if (canvas()) {
if (Page* p = canvas()->GetDocument().GetPage()) {
synthesized_errors_to_console_ =
p->GetSettings().GetWebGLErrorsToConsoleEnabled();
}
}
is_depth_stencil_supported_ =
ExtensionsUtil()->IsExtensionEnabled("GL_OES_packed_depth_stencil");
}
void WebGLRenderingContextBase::AddCompressedTextureFormat(GLenum format) {
if (!compressed_texture_formats_.Contains(format))
compressed_texture_formats_.push_back(format);
}
void WebGLRenderingContextBase::RemoveAllCompressedTextureFormats() {
compressed_texture_formats_.Clear();
}
// Helper function for V8 bindings to identify what version of WebGL a
// CanvasRenderingContext supports.
unsigned WebGLRenderingContextBase::GetWebGLVersion(
const CanvasRenderingContext* context) {
if (!context->Is3d())
return 0;
return static_cast<const WebGLRenderingContextBase*>(context)->Version();
}
WebGLRenderingContextBase::~WebGLRenderingContextBase() {
// Now that the context and context group no longer hold on to the
// objects they create, and now that the objects are eagerly finalized
// rather than the context, there is very little useful work that this
// destructor can do, since it's not allowed to touch other on-heap
// objects. All it can do is destroy its underlying context, which, if
// there are no other contexts in the same share group, will cause all of
// the underlying graphics resources to be deleted. (Currently, it's
// always the case that there are no other contexts in the same share
// group -- resource sharing between WebGL contexts is not yet
// implemented, and due to its complex semantics, it's doubtful that it
// ever will be.)
DestroyContext();
// Now that this context is destroyed, see if there's a
// previously-evicted one that should be restored.
RestoreEvictedContext(this);
}
void WebGLRenderingContextBase::DestroyContext() {
if (!GetDrawingBuffer())
return;
extensions_util_.reset();
std::unique_ptr<WTF::Closure> null_closure;
std::unique_ptr<WTF::Function<void(const char*, int32_t)>> null_function;
GetDrawingBuffer()->ContextProvider()->SetLostContextCallback(
ConvertToBaseCallback(std::move(null_closure)));
GetDrawingBuffer()->ContextProvider()->SetErrorMessageCallback(
ConvertToBaseCallback(std::move(null_function)));
GetDrawingBuffer()->AddNewMailboxCallback(nullptr);
ASSERT(GetDrawingBuffer());
drawing_buffer_->BeginDestruction();
drawing_buffer_.Clear();
}
void WebGLRenderingContextBase::MarkContextChanged(
ContentChangeType change_type) {
if (framebuffer_binding_ || isContextLost())
return;
if (!GetDrawingBuffer()->MarkContentsChanged() && marked_canvas_dirty_) {
return;
}
if (!canvas())
return;
marked_canvas_dirty_ = true;
if (!animation_frame_in_progress_) {
animation_frame_in_progress_ = true;
LayoutBox* layout_box = canvas()->GetLayoutBox();
if (layout_box && layout_box->HasAcceleratedCompositing()) {
layout_box->ContentChanged(change_type);
}
IntSize canvas_size = ClampedCanvasSize();
DidDraw(SkIRect::MakeXYWH(0, 0, canvas_size.Width(), canvas_size.Height()));
}
}
void WebGLRenderingContextBase::FinalizeFrame() {
animation_frame_in_progress_ = false;
}
void WebGLRenderingContextBase::OnErrorMessage(const char* message,
int32_t id) {
if (synthesized_errors_to_console_)
PrintGLErrorToConsole(message);
probe::didFireWebGLErrorOrWarning(canvas(), message);
}
void WebGLRenderingContextBase::NotifyCanvasContextChanged() {
if (!canvas())
return;
canvas()->NotifyListenersCanvasChanged();
}
WebGLRenderingContextBase::HowToClear
WebGLRenderingContextBase::ClearIfComposited(GLbitfield mask) {
if (isContextLost())
return kSkipped;
if (!GetDrawingBuffer()->BufferClearNeeded() ||
(mask && framebuffer_binding_))
return kSkipped;
Nullable<WebGLContextAttributes> context_attributes;
getContextAttributes(context_attributes);
if (context_attributes.IsNull()) {
// Unlikely, but context was lost.
return kSkipped;
}
// Determine if it's possible to combine the clear the user asked for and this
// clear.
bool combined_clear = mask && !scissor_enabled_;
ContextGL()->Disable(GL_SCISSOR_TEST);
if (combined_clear && (mask & GL_COLOR_BUFFER_BIT)) {
ContextGL()->ClearColor(color_mask_[0] ? clear_color_[0] : 0,
color_mask_[1] ? clear_color_[1] : 0,
color_mask_[2] ? clear_color_[2] : 0,
color_mask_[3] ? clear_color_[3] : 0);
} else {
ContextGL()->ClearColor(0, 0, 0, 0);
}
ContextGL()->ColorMask(
true, true, true,
!GetDrawingBuffer()->RequiresAlphaChannelToBePreserved());
GLbitfield clear_mask = GL_COLOR_BUFFER_BIT;
if (context_attributes.Get().depth()) {
if (!combined_clear || !depth_mask_ || !(mask & GL_DEPTH_BUFFER_BIT))
ContextGL()->ClearDepthf(1.0f);
clear_mask |= GL_DEPTH_BUFFER_BIT;
ContextGL()->DepthMask(true);
}
if (context_attributes.Get().stencil() ||
GetDrawingBuffer()->HasImplicitStencilBuffer()) {
if (combined_clear && (mask & GL_STENCIL_BUFFER_BIT))
ContextGL()->ClearStencil(clear_stencil_ & stencil_mask_);
else
ContextGL()->ClearStencil(0);
clear_mask |= GL_STENCIL_BUFFER_BIT;
ContextGL()->StencilMaskSeparate(GL_FRONT, 0xFFFFFFFF);
}
ContextGL()->ColorMask(
true, true, true,
!GetDrawingBuffer()->DefaultBufferRequiresAlphaChannelToBePreserved());
GetDrawingBuffer()->ClearFramebuffers(clear_mask);
// Call the DrawingBufferClient method to restore scissor test, mask, and
// clear values, because we dirtied them above.
DrawingBufferClientRestoreScissorTest();
DrawingBufferClientRestoreMaskAndClearValues();
GetDrawingBuffer()->SetBufferClearNeeded(false);
return combined_clear ? kCombinedClear : kJustClear;
}
void WebGLRenderingContextBase::MarkCompositedAndClearBackbufferIfNeeded() {
MarkLayerComposited();
ClearIfComposited();
}
void WebGLRenderingContextBase::RestoreScissorEnabled() {
if (isContextLost())
return;
if (scissor_enabled_) {
ContextGL()->Enable(GL_SCISSOR_TEST);
} else {
ContextGL()->Disable(GL_SCISSOR_TEST);
}
}
void WebGLRenderingContextBase::RestoreScissorBox() {
if (isContextLost())
return;
ContextGL()->Scissor(scissor_box_[0], scissor_box_[1], scissor_box_[2],
scissor_box_[3]);
}
void WebGLRenderingContextBase::RestoreClearColor() {
if (isContextLost())
return;
ContextGL()->ClearColor(clear_color_[0], clear_color_[1], clear_color_[2],
clear_color_[3]);
}
void WebGLRenderingContextBase::RestoreColorMask() {
if (isContextLost())
return;
ContextGL()->ColorMask(color_mask_[0], color_mask_[1], color_mask_[2],
color_mask_[3]);
}
void WebGLRenderingContextBase::MarkLayerComposited() {
if (!isContextLost())
GetDrawingBuffer()->SetBufferClearNeeded(true);
}
void WebGLRenderingContextBase::SetIsHidden(bool hidden) {
is_hidden_ = hidden;
if (GetDrawingBuffer())
GetDrawingBuffer()->SetIsHidden(hidden);
if (!hidden && isContextLost() && restore_allowed_ &&
auto_recovery_method_ == kAuto) {
ASSERT(!restore_timer_.IsActive());
restore_timer_.StartOneShot(0, BLINK_FROM_HERE);
}
}
bool WebGLRenderingContextBase::PaintRenderingResultsToCanvas(
SourceDrawingBuffer source_buffer) {
if (isContextLost())
return false;
bool must_clear_now = ClearIfComposited() != kSkipped;
if (!marked_canvas_dirty_ && !must_clear_now)
return false;
canvas()->ClearCopiedImage();
marked_canvas_dirty_ = false;
if (!canvas()->Buffer())
return false;
ScopedTexture2DRestorer restorer(this);
ScopedFramebufferRestorer fbo_restorer(this);
GetDrawingBuffer()->ResolveAndBindForReadAndDraw();
if (!canvas()->Buffer()->CopyRenderingResultsFromDrawingBuffer(
GetDrawingBuffer(), source_buffer)) {
// Currently, copyRenderingResultsFromDrawingBuffer is expected to always
// succeed because cases where canvas()-buffer() is not accelerated are
// handle before reaching this point. If that assumption ever stops holding
// true, we may need to implement a fallback right here.
ASSERT_NOT_REACHED();
return false;
}
return true;
}
ImageData* WebGLRenderingContextBase::PaintRenderingResultsToImageData(
SourceDrawingBuffer source_buffer) {
if (isContextLost())
return nullptr;
if (CreationAttributes().premultipliedAlpha())
return nullptr;
ClearIfComposited();
GetDrawingBuffer()->ResolveAndBindForReadAndDraw();
ScopedFramebufferRestorer restorer(this);
int width, height;
WTF::ArrayBufferContents contents;
if (!GetDrawingBuffer()->PaintRenderingResultsToImageData(
width, height, source_buffer, contents))
return nullptr;
DOMArrayBuffer* image_data_pixels = DOMArrayBuffer::Create(contents);
return ImageData::Create(
IntSize(width, height),
NotShared<DOMUint8ClampedArray>(DOMUint8ClampedArray::Create(
image_data_pixels, 0, image_data_pixels->ByteLength())));
}
void WebGLRenderingContextBase::Reshape(int width, int height) {
if (isContextLost())
return;
GLint buffer = 0;
if (IsWebGL2OrHigher()) {
// This query returns client side cached binding, so it's trivial.
// If it changes in the future, such query is heavy and should be avoided.
ContextGL()->GetIntegerv(GL_PIXEL_UNPACK_BUFFER_BINDING, &buffer);
if (buffer) {
ContextGL()->BindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
}
}
// This is an approximation because at WebGLRenderingContextBase level we
// don't know if the underlying FBO uses textures or renderbuffers.
GLint max_size = std::min(max_texture_size_, max_renderbuffer_size_);
GLint max_width = std::min(max_size, max_viewport_dims_[0]);
GLint max_height = std::min(max_size, max_viewport_dims_[1]);
width = Clamp(width, 1, max_width);
height = Clamp(height, 1, max_height);
// Limit drawing buffer area to 4k*4k to avoid memory exhaustion. Width or
// height may be larger than 4k as long as it's within the max viewport
// dimensions and total area remains within the limit.
// For example: 5120x2880 should be fine.
const int kMaxArea = 4096 * 4096;
int current_area = width * height;
if (current_area > kMaxArea) {
// If we've exceeded the area limit scale the buffer down, preserving
// ascpect ratio, until it fits.
float scale_factor =
sqrtf(static_cast<float>(kMaxArea) / static_cast<float>(current_area));
width = std::max(1, static_cast<int>(width * scale_factor));
height = std::max(1, static_cast<int>(height * scale_factor));
}
// We don't have to mark the canvas as dirty, since the newly created image
// buffer will also start off clear (and this matches what reshape will do).
GetDrawingBuffer()->Resize(IntSize(width, height));
if (buffer) {
ContextGL()->BindBuffer(GL_PIXEL_UNPACK_BUFFER,
static_cast<GLuint>(buffer));
}
}
int WebGLRenderingContextBase::drawingBufferWidth() const {
return isContextLost() ? 0 : GetDrawingBuffer()->size().Width();
}
int WebGLRenderingContextBase::drawingBufferHeight() const {
return isContextLost() ? 0 : GetDrawingBuffer()->size().Height();
}
void WebGLRenderingContextBase::activeTexture(GLenum texture) {
if (isContextLost())
return;
if (texture - GL_TEXTURE0 >= texture_units_.size()) {
SynthesizeGLError(GL_INVALID_ENUM, "activeTexture",
"texture unit out of range");
return;
}
active_texture_unit_ = texture - GL_TEXTURE0;
ContextGL()->ActiveTexture(texture);
}
void WebGLRenderingContextBase::attachShader(WebGLProgram* program,
WebGLShader* shader) {
if (isContextLost() || !ValidateWebGLObject("attachShader", program) ||
!ValidateWebGLObject("attachShader", shader))
return;
if (!program->AttachShader(shader)) {
SynthesizeGLError(GL_INVALID_OPERATION, "attachShader",
"shader attachment already has shader");
return;
}
ContextGL()->AttachShader(ObjectOrZero(program), ObjectOrZero(shader));
shader->OnAttached();
}
void WebGLRenderingContextBase::bindAttribLocation(WebGLProgram* program,
GLuint index,
const String& name) {
if (isContextLost() || !ValidateWebGLObject("bindAttribLocation", program))
return;
if (!ValidateLocationLength("bindAttribLocation", name))
return;
if (IsPrefixReserved(name)) {
SynthesizeGLError(GL_INVALID_OPERATION, "bindAttribLocation",
"reserved prefix");
return;
}
ContextGL()->BindAttribLocation(ObjectOrZero(program), index,
name.Utf8().Data());
}
bool WebGLRenderingContextBase::CheckObjectToBeBound(const char* function_name,
WebGLObject* object,
bool& deleted) {
deleted = false;
if (isContextLost())
return false;
if (object) {
if (!object->Validate(ContextGroup(), this)) {
SynthesizeGLError(GL_INVALID_OPERATION, function_name,
"object not from this context");
return false;
}
deleted = !object->HasObject();
}
return true;
}
bool WebGLRenderingContextBase::ValidateAndUpdateBufferBindTarget(
const char* function_name,
GLenum target,
WebGLBuffer* buffer) {
if (!ValidateBufferTarget(function_name, target))
return false;
if (buffer && buffer->GetInitialTarget() &&
buffer->GetInitialTarget() != target) {
SynthesizeGLError(GL_INVALID_OPERATION, function_name,
"buffers can not be used with multiple targets");
return false;
}
switch (target) {
case GL_ARRAY_BUFFER:
bound_array_buffer_ = buffer;
break;
case GL_ELEMENT_ARRAY_BUFFER:
bound_vertex_array_object_->SetElementArrayBuffer(buffer);
break;
default:
ASSERT_NOT_REACHED();
return false;
}
if (buffer && !buffer->GetInitialTarget())
buffer->SetInitialTarget(target);
return true;
}
void WebGLRenderingContextBase::bindBuffer(GLenum target, WebGLBuffer* buffer) {
bool deleted;
if (!CheckObjectToBeBound("bindBuffer", buffer, deleted))
return;
if (deleted) {
SynthesizeGLError(GL_INVALID_OPERATION, "bindBuffer",
"attempt to bind a deleted buffer");
return;
}
if (!ValidateAndUpdateBufferBindTarget("bindBuffer", target, buffer))
return;
ContextGL()->BindBuffer(target, ObjectOrZero(buffer));
}
void WebGLRenderingContextBase::bindFramebuffer(GLenum target,
WebGLFramebuffer* buffer) {
bool deleted;
if (!CheckObjectToBeBound("bindFramebuffer", buffer, deleted))
return;
if (deleted) {
SynthesizeGLError(GL_INVALID_OPERATION, "bindFramebuffer",
"attempt to bind a deleted framebuffer");
return;
}
if (target != GL_FRAMEBUFFER) {
SynthesizeGLError(GL_INVALID_ENUM, "bindFramebuffer", "invalid target");
return;
}
SetFramebuffer(target, buffer);
}
void WebGLRenderingContextBase::bindRenderbuffer(
GLenum target,
WebGLRenderbuffer* render_buffer) {
bool deleted;
if (!CheckObjectToBeBound("bindRenderbuffer", render_buffer, deleted))
return;
if (deleted) {
SynthesizeGLError(GL_INVALID_OPERATION, "bindRenderbuffer",
"attempt to bind a deleted renderbuffer");
return;
}
if (target != GL_RENDERBUFFER) {
SynthesizeGLError(GL_INVALID_ENUM, "bindRenderbuffer", "invalid target");
return;
}
renderbuffer_binding_ = render_buffer;
ContextGL()->BindRenderbuffer(target, ObjectOrZero(render_buffer));
if (render_buffer)
render_buffer->SetHasEverBeenBound();
}
void WebGLRenderingContextBase::bindTexture(GLenum target,
WebGLTexture* texture) {
bool deleted;
if (!CheckObjectToBeBound("bindTexture", texture, deleted))
return;
if (deleted) {
SynthesizeGLError(GL_INVALID_OPERATION, "bindTexture",
"attempt to bind a deleted texture");
return;
}
if (texture && texture->GetTarget() && texture->GetTarget() != target) {
SynthesizeGLError(GL_INVALID_OPERATION, "bindTexture",
"textures can not be used with multiple targets");
return;
}
if (target == GL_TEXTURE_2D) {
texture_units_[active_texture_unit_].texture2d_binding_ =
TraceWrapperMember<WebGLTexture>(this, texture);
} else if (target == GL_TEXTURE_CUBE_MAP) {
texture_units_[active_texture_unit_].texture_cube_map_binding_ =
TraceWrapperMember<WebGLTexture>(this, texture);
} else if (IsWebGL2OrHigher() && target == GL_TEXTURE_2D_ARRAY) {
texture_units_[active_texture_unit_].texture2d_array_binding_ =
TraceWrapperMember<WebGLTexture>(this, texture);
} else if (IsWebGL2OrHigher() && target == GL_TEXTURE_3D) {
texture_units_[active_texture_unit_].texture3d_binding_ =
TraceWrapperMember<WebGLTexture>(this, texture);
} else {
SynthesizeGLError(GL_INVALID_ENUM, "bindTexture", "invalid target");
return;
}
ContextGL()->BindTexture(target, ObjectOrZero(texture));
if (texture) {
texture->SetTarget(target);
one_plus_max_non_default_texture_unit_ =
max(active_texture_unit_ + 1, one_plus_max_non_default_texture_unit_);
} else {
// If the disabled index is the current maximum, trace backwards to find the
// new max enabled texture index
if (one_plus_max_non_default_texture_unit_ == active_texture_unit_ + 1) {
FindNewMaxNonDefaultTextureUnit();
}
}
// Note: previously we used to automatically set the TEXTURE_WRAP_R
// repeat mode to CLAMP_TO_EDGE for cube map textures, because OpenGL
// ES 2.0 doesn't expose this flag (a bug in the specification) and
// otherwise the application has no control over the seams in this
// dimension. However, it appears that supporting this properly on all
// platforms is fairly involved (will require a HashMap from texture ID
// in all ports), and we have not had any complaints, so the logic has
// been removed.
}
void WebGLRenderingContextBase::blendColor(GLfloat red,
GLfloat green,
GLfloat blue,
GLfloat alpha) {
if (isContextLost())
return;
ContextGL()->BlendColor(red, green, blue, alpha);
}
void WebGLRenderingContextBase::blendEquation(GLenum mode) {
if (isContextLost() || !ValidateBlendEquation("blendEquation", mode))
return;
ContextGL()->BlendEquation(mode);
}
void WebGLRenderingContextBase::blendEquationSeparate(GLenum mode_rgb,
GLenum mode_alpha) {
if (isContextLost() ||
!ValidateBlendEquation("blendEquationSeparate", mode_rgb) ||
!ValidateBlendEquation("blendEquationSeparate", mode_alpha))
return;
ContextGL()->BlendEquationSeparate(mode_rgb, mode_alpha);
}
void WebGLRenderingContextBase::blendFunc(GLenum sfactor, GLenum dfactor) {
if (isContextLost() ||
!ValidateBlendFuncFactors("blendFunc", sfactor, dfactor))
return;
ContextGL()->BlendFunc(sfactor, dfactor);
}
void WebGLRenderingContextBase::blendFuncSeparate(GLenum src_rgb,
GLenum dst_rgb,
GLenum src_alpha,
GLenum dst_alpha) {
// Note: Alpha does not have the same restrictions as RGB.
if (isContextLost() ||
!ValidateBlendFuncFactors("blendFuncSeparate", src_rgb, dst_rgb))
return;
ContextGL()->BlendFuncSeparate(src_rgb, dst_rgb, src_alpha, dst_alpha);
}
void WebGLRenderingContextBase::BufferDataImpl(GLenum target,
long long size,
const void* data,
GLenum usage) {
WebGLBuffer* buffer = ValidateBufferDataTarget("bufferData", target);
if (!buffer)
return;
if (!ValidateBufferDataUsage("bufferData", usage))
return;
if (!ValidateValueFitNonNegInt32("bufferData", "size", size))
return;
buffer->SetSize(size);
ContextGL()->BufferData(target, static_cast<GLsizeiptr>(size), data, usage);
}
void WebGLRenderingContextBase::bufferData(GLenum target,
long long size,
GLenum usage) {
if (isContextLost())
return;
BufferDataImpl(target, size, 0, usage);
}
void WebGLRenderingContextBase::bufferData(GLenum target,
DOMArrayBuffer* data,
GLenum usage) {
if (isContextLost())
return;
if (!data) {
SynthesizeGLError(GL_INVALID_VALUE, "bufferData", "no data");
return;
}
BufferDataImpl(target, data->ByteLength(), data->Data(), usage);
}
void WebGLRenderingContextBase::bufferData(GLenum target,
NotShared<DOMArrayBufferView> data,
GLenum usage) {
if (isContextLost())
return;
DCHECK(data);
BufferDataImpl(target, data.View()->byteLength(), data.View()->BaseAddress(),
usage);
}
void WebGLRenderingContextBase::BufferSubDataImpl(GLenum target,
long long offset,
GLsizeiptr size,
const void* data) {
WebGLBuffer* buffer = ValidateBufferDataTarget("bufferSubData", target);
if (!buffer)
return;
if (!ValidateValueFitNonNegInt32("bufferSubData", "offset", offset))
return;
if (!data)
return;
if (offset + static_cast<long long>(size) > buffer->GetSize()) {
SynthesizeGLError(GL_INVALID_VALUE, "bufferSubData", "buffer overflow");
return;
}
ContextGL()->BufferSubData(target, static_cast<GLintptr>(offset), size, data);
}
void WebGLRenderingContextBase::bufferSubData(GLenum target,
long long offset,
DOMArrayBuffer* data) {
if (isContextLost())
return;
DCHECK(data);
BufferSubDataImpl(target, offset, data->ByteLength(), data->Data());
}
void WebGLRenderingContextBase::bufferSubData(
GLenum target,
long long offset,
const FlexibleArrayBufferView& data) {
if (isContextLost())
return;
DCHECK(data);
BufferSubDataImpl(target, offset, data.ByteLength(),
data.BaseAddressMaybeOnStack());
}
bool WebGLRenderingContextBase::ValidateFramebufferTarget(GLenum target) {
if (target == GL_FRAMEBUFFER)
return true;
return false;
}
WebGLFramebuffer* WebGLRenderingContextBase::GetFramebufferBinding(
GLenum target) {
if (target == GL_FRAMEBUFFER)
return framebuffer_binding_.Get();
return nullptr;
}
WebGLFramebuffer* WebGLRenderingContextBase::GetReadFramebufferBinding() {
return framebuffer_binding_.Get();
}
GLenum WebGLRenderingContextBase::checkFramebufferStatus(GLenum target) {
if (isContextLost())
return GL_FRAMEBUFFER_UNSUPPORTED;
if (!ValidateFramebufferTarget(target)) {
SynthesizeGLError(GL_INVALID_ENUM, "checkFramebufferStatus",
"invalid target");
return 0;
}
WebGLFramebuffer* framebuffer_binding = GetFramebufferBinding(target);
if (framebuffer_binding) {
const char* reason = "framebuffer incomplete";
GLenum status = framebuffer_binding->CheckDepthStencilStatus(&reason);
if (status != GL_FRAMEBUFFER_COMPLETE) {
EmitGLWarning("checkFramebufferStatus", reason);
return status;
}
}
return ContextGL()->CheckFramebufferStatus(target);
}
void WebGLRenderingContextBase::clear(GLbitfield mask) {
if (isContextLost())
return;
if (mask &
~(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT)) {
SynthesizeGLError(GL_INVALID_VALUE, "clear", "invalid mask");
return;
}
const char* reason = "framebuffer incomplete";
if (framebuffer_binding_ && framebuffer_binding_->CheckDepthStencilStatus(
&reason) != GL_FRAMEBUFFER_COMPLETE) {
SynthesizeGLError(GL_INVALID_FRAMEBUFFER_OPERATION, "clear", reason);
return;
}
ScopedRGBEmulationColorMask emulation_color_mask(this, color_mask_,
drawing_buffer_.Get());
if (ClearIfComposited(mask) != kCombinedClear) {
// If clearing the default back buffer's depth buffer, also clear the
// stencil buffer, if one was allocated implicitly. This avoids performance
// problems on some GPUs.
if (!framebuffer_binding_ &&
GetDrawingBuffer()->HasImplicitStencilBuffer() &&
(mask & GL_DEPTH_BUFFER_BIT)) {
// It shouldn't matter what value it's cleared to, since in other queries
// in the API, we claim that the stencil buffer doesn't exist.
mask |= GL_STENCIL_BUFFER_BIT;
}
ContextGL()->Clear(mask);
}
MarkContextChanged(kCanvasChanged);
}
void WebGLRenderingContextBase::clearColor(GLfloat r,
GLfloat g,
GLfloat b,
GLfloat a) {
if (isContextLost())
return;
if (std::isnan(r))
r = 0;
if (std::isnan(g))
g = 0;
if (std::isnan(b))
b = 0;
if (std::isnan(a))
a = 1;
clear_color_[0] = r;
clear_color_[1] = g;
clear_color_[2] = b;
clear_color_[3] = a;
ContextGL()->ClearColor(r, g, b, a);
}
void WebGLRenderingContextBase::clearDepth(GLfloat depth) {
if (isContextLost())
return;
clear_depth_ = depth;
ContextGL()->ClearDepthf(depth);
}
void WebGLRenderingContextBase::clearStencil(GLint s) {
if (isContextLost())
return;
clear_stencil_ = s;
ContextGL()->ClearStencil(s);
}
void WebGLRenderingContextBase::colorMask(GLboolean red,
GLboolean green,
GLboolean blue,
GLboolean alpha) {
if (isContextLost())
return;
color_mask_[0] = red;
color_mask_[1] = green;
color_mask_[2] = blue;
color_mask_[3] = alpha;
ContextGL()->ColorMask(red, green, blue, alpha);
}
void WebGLRenderingContextBase::compileShader(WebGLShader* shader) {
if (isContextLost() || !ValidateWebGLObject("compileShader", shader))
return;
ContextGL()->CompileShader(ObjectOrZero(shader));
}
void WebGLRenderingContextBase::compressedTexImage2D(
GLenum target,
GLint level,
GLenum internalformat,
GLsizei width,
GLsizei height,
GLint border,
NotShared<DOMArrayBufferView> data) {
if (isContextLost())
return;
if (!ValidateTexture2DBinding("compressedTexImage2D", target))
return;
if (!ValidateCompressedTexFormat("compressedTexImage2D", internalformat))
return;
ContextGL()->CompressedTexImage2D(target, level, internalformat, width,
height, border, data.View()->byteLength(),
data.View()->BaseAddress());
}
void WebGLRenderingContextBase::compressedTexSubImage2D(
GLenum target,
GLint level,
GLint xoffset,
GLint yoffset,
GLsizei width,
GLsizei height,
GLenum format,
NotShared<DOMArrayBufferView> data) {
if (isContextLost())
return;
if (!ValidateTexture2DBinding("compressedTexSubImage2D", target))
return;
if (!ValidateCompressedTexFormat("compressedTexSubImage2D", format))
return;
ContextGL()->CompressedTexSubImage2D(
target, level, xoffset, yoffset, width, height, format,
data.View()->byteLength(), data.View()->BaseAddress());
}
bool WebGLRenderingContextBase::ValidateSettableTexFormat(
const char* function_name,
GLenum format) {
if (IsWebGL2OrHigher())
return true;
if (WebGLImageConversion::GetChannelBitsByFormat(format) &
WebGLImageConversion::kChannelDepthStencil) {
SynthesizeGLError(GL_INVALID_OPERATION, function_name,
"format can not be set, only rendered to");
return false;
}
return true;
}
bool WebGLRenderingContextBase::ValidateCopyTexFormat(const char* function_name,
GLenum internalformat) {
if (!is_web_gl2_internal_formats_copy_tex_image_added_ &&
IsWebGL2OrHigher()) {
ADD_VALUES_TO_SET(supported_internal_formats_copy_tex_image_,
kSupportedInternalFormatsES3);
is_web_gl2_internal_formats_copy_tex_image_added_ = true;
}
if (supported_internal_formats_copy_tex_image_.find(internalformat) ==
supported_internal_formats_copy_tex_image_.end()) {
SynthesizeGLError(GL_INVALID_ENUM, function_name, "invalid internalformat");
return false;
}
return true;
}
void WebGLRenderingContextBase::copyTexImage2D(GLenum target,
GLint level,
GLenum internalformat,
GLint x,
GLint y,
GLsizei width,
GLsizei height,
GLint border) {
if (isContextLost())
return;
if (!ValidateTexture2DBinding("copyTexImage2D", target))
return;
if (!ValidateCopyTexFormat("copyTexImage2D", internalformat))
return;
if (!ValidateSettableTexFormat("copyTexImage2D", internalformat))
return;
WebGLFramebuffer* read_framebuffer_binding = nullptr;
if (!ValidateReadBufferAndGetInfo("copyTexImage2D", read_framebuffer_binding))
return;
ClearIfComposited();
ScopedDrawingBufferBinder binder(GetDrawingBuffer(),
read_framebuffer_binding);
ContextGL()->CopyTexImage2D(target, level, internalformat, x, y, width,
height, border);
}
void WebGLRenderingContextBase::copyTexSubImage2D(GLenum target,
GLint level,
GLint xoffset,
GLint yoffset,
GLint x,
GLint y,
GLsizei width,
GLsizei height) {
if (isContextLost())
return;
if (!ValidateTexture2DBinding("copyTexSubImage2D", target))
return;
WebGLFramebuffer* read_framebuffer_binding = nullptr;
if (!ValidateReadBufferAndGetInfo("copyTexSubImage2D",
read_framebuffer_binding))
return;
ClearIfComposited();
ScopedDrawingBufferBinder binder(GetDrawingBuffer(),
read_framebuffer_binding);
ContextGL()->CopyTexSubImage2D(target, level, xoffset, yoffset, x, y, width,
height);
}
WebGLBuffer* WebGLRenderingContextBase::createBuffer() {
if (isContextLost())
return nullptr;
return WebGLBuffer::Create(this);
}
WebGLFramebuffer* WebGLRenderingContextBase::createFramebuffer() {
if (isContextLost())
return nullptr;
return WebGLFramebuffer::Create(this);
}
WebGLTexture* WebGLRenderingContextBase::createTexture() {
if (isContextLost())
return nullptr;
return WebGLTexture::Create(this);
}
WebGLProgram* WebGLRenderingContextBase::createProgram() {
if (isContextLost())
return nullptr;
return WebGLProgram::Create(this);
}
WebGLRenderbuffer* WebGLRenderingContextBase::createRenderbuffer() {
if (isContextLost())
return nullptr;
return WebGLRenderbuffer::Create(this);
}
void WebGLRenderingContextBase::SetBoundVertexArrayObject(
WebGLVertexArrayObjectBase* array_object) {
if (array_object)
bound_vertex_array_object_ = array_object;
else
bound_vertex_array_object_ = default_vertex_array_object_;
}
WebGLShader* WebGLRenderingContextBase::createShader(GLenum type) {
if (isContextLost())
return nullptr;
if (type != GL_VERTEX_SHADER && type != GL_FRAGMENT_SHADER) {
SynthesizeGLError(GL_INVALID_ENUM, "createShader", "invalid shader type");
return nullptr;
}
return WebGLShader::Create(this, type);
}
void WebGLRenderingContextBase::cullFace(GLenum mode) {
if (isContextLost())
return;
ContextGL()->CullFace(mode);
}
bool WebGLRenderingContextBase::DeleteObject(WebGLObject* object) {
if (isContextLost() || !object)
return false;
if (!object->Validate(ContextGroup(), this)) {
SynthesizeGLError(GL_INVALID_OPERATION, "delete",
"object does not belong to this context");
return false;
}
if (object->HasObject()) {
// We need to pass in context here because we want
// things in this context unbound.
object->DeleteObject(ContextGL());
}
return true;
}
void WebGLRenderingContextBase::deleteBuffer(WebGLBuffer* buffer) {
if (!DeleteObject(buffer))
return;
RemoveBoundBuffer(buffer);
}
void WebGLRenderingContextBase::deleteFramebuffer(
WebGLFramebuffer* framebuffer) {
if (!DeleteObject(framebuffer))
return;
if (framebuffer == framebuffer_binding_) {
framebuffer_binding_ = nullptr;
// Have to call drawingBuffer()->bind() here to bind back to internal fbo.
GetDrawingBuffer()->Bind(GL_FRAMEBUFFER);
}
}
void WebGLRenderingContextBase::deleteProgram(WebGLProgram* program) {
DeleteObject(program);
// We don't reset m_currentProgram to 0 here because the deletion of the
// current program is delayed.
}
void WebGLRenderingContextBase::deleteRenderbuffer(
WebGLRenderbuffer* renderbuffer) {
if (!DeleteObject(renderbuffer))
return;
if (renderbuffer == renderbuffer_binding_) {
renderbuffer_binding_ = nullptr;
}
if (framebuffer_binding_)
framebuffer_binding_->RemoveAttachmentFromBoundFramebuffer(GL_FRAMEBUFFER,
renderbuffer);
if (GetFramebufferBinding(GL_READ_FRAMEBUFFER))
GetFramebufferBinding(GL_READ_FRAMEBUFFER)
->RemoveAttachmentFromBoundFramebuffer(GL_READ_FRAMEBUFFER,
renderbuffer);
}
void WebGLRenderingContextBase::deleteShader(WebGLShader* shader) {
DeleteObject(shader);
}
void WebGLRenderingContextBase::deleteTexture(WebGLTexture* texture) {
if (!DeleteObject(texture))
return;
int max_bound_texture_index = -1;
for (size_t i = 0; i < one_plus_max_non_default_texture_unit_; ++i) {
if (texture == texture_units_[i].texture2d_binding_) {
texture_units_[i].texture2d_binding_ = nullptr;
max_bound_texture_index = i;
}
if (texture == texture_units_[i].texture_cube_map_binding_) {
texture_units_[i].texture_cube_map_binding_ = nullptr;
max_bound_texture_index = i;
}
if (IsWebGL2OrHigher()) {
if (texture == texture_units_[i].texture3d_binding_) {
texture_units_[i].texture3d_binding_ = nullptr;
max_bound_texture_index = i;
}
if (texture == texture_units_[i].texture2d_array_binding_) {
texture_units_[i].texture2d_array_binding_ = nullptr;
max_bound_texture_index = i;
}
}
}
if (framebuffer_binding_)
framebuffer_binding_->RemoveAttachmentFromBoundFramebuffer(GL_FRAMEBUFFER,
texture);
if (GetFramebufferBinding(GL_READ_FRAMEBUFFER))
GetFramebufferBinding(GL_READ_FRAMEBUFFER)
->RemoveAttachmentFromBoundFramebuffer(GL_READ_FRAMEBUFFER, texture);
// If the deleted was bound to the the current maximum index, trace backwards
// to find the new max texture index.
if (one_plus_max_non_default_texture_unit_ ==
static_cast<unsigned long>(max_bound_texture_index + 1)) {
FindNewMaxNonDefaultTextureUnit();
}
}
void WebGLRenderingContextBase::depthFunc(GLenum func) {
if (isContextLost())
return;
ContextGL()->DepthFunc(func);
}
void WebGLRenderingContextBase::depthMask(GLboolean flag) {
if (isContextLost())
return;
depth_mask_ = flag;
ContextGL()->DepthMask(flag);
}
void WebGLRenderingContextBase::depthRange(GLfloat z_near, GLfloat z_far) {
if (isContextLost())
return;
// Check required by WebGL spec section 6.12
if (z_near > z_far) {
SynthesizeGLError(GL_INVALID_OPERATION, "depthRange", "zNear > zFar");
return;
}
ContextGL()->DepthRangef(z_near, z_far);
}
void WebGLRenderingContextBase::detachShader(WebGLProgram* program,
WebGLShader* shader) {
if (isContextLost() || !ValidateWebGLObject("detachShader", program) ||
!ValidateWebGLObject("detachShader", shader))
return;
if (!program->DetachShader(shader)) {
SynthesizeGLError(GL_INVALID_OPERATION, "detachShader",
"shader not attached");
return;
}
ContextGL()->DetachShader(ObjectOrZero(program), ObjectOrZero(shader));
shader->OnDetached(ContextGL());
}
void WebGLRenderingContextBase::disable(GLenum cap) {
if (isContextLost() || !ValidateCapability("disable", cap))
return;
if (cap == GL_STENCIL_TEST) {
stencil_enabled_ = false;
ApplyStencilTest();
return;
}
if (cap == GL_SCISSOR_TEST)
scissor_enabled_ = false;
ContextGL()->Disable(cap);
}
void WebGLRenderingContextBase::disableVertexAttribArray(GLuint index) {
if (isContextLost())
return;
if (index >= max_vertex_attribs_) {
SynthesizeGLError(GL_INVALID_VALUE, "disableVertexAttribArray",
"index out of range");
return;
}
bound_vertex_array_object_->SetAttribEnabled(index, false);
ContextGL()->DisableVertexAttribArray(index);
}
bool WebGLRenderingContextBase::ValidateRenderingState(
const char* function_name) {
// Command buffer will not error if no program is bound.
if (!current_program_) {
SynthesizeGLError(GL_INVALID_OPERATION, function_name,
"no valid shader program in use");
return false;
}
return true;
}
bool WebGLRenderingContextBase::ValidateWebGLObject(const char* function_name,
WebGLObject* object) {
DCHECK(object);
if (!object->HasObject()) {
SynthesizeGLError(GL_INVALID_VALUE, function_name,
"no object or object deleted");
return false;
}
if (!object->Validate(ContextGroup(), this)) {
SynthesizeGLError(GL_INVALID_OPERATION, function_name,
"object does not belong to this context");
return false;
}
return true;
}
void WebGLRenderingContextBase::drawArrays(GLenum mode,
GLint first,
GLsizei count) {
if (!ValidateDrawArrays("drawArrays"))
return;
if (!bound_vertex_array_object_->IsAllEnabledAttribBufferBound()) {
SynthesizeGLError(GL_INVALID_OPERATION, "drawArrays",
"no buffer is bound to enabled attribute");
return;
}
ScopedRGBEmulationColorMask emulation_color_mask(this, color_mask_,
drawing_buffer_.Get());
ClearIfComposited();
ContextGL()->DrawArrays(mode, first, count);
MarkContextChanged(kCanvasChanged);
}
void WebGLRenderingContextBase::drawElements(GLenum mode,
GLsizei count,
GLenum type,
long long offset) {
if (!ValidateDrawElements("drawElements", type, offset))
return;
if (!bound_vertex_array_object_->IsAllEnabledAttribBufferBound()) {
SynthesizeGLError(GL_INVALID_OPERATION, "drawElements",
"no buffer is bound to enabled attribute");
return;
}
ScopedRGBEmulationColorMask emulation_color_mask(this, color_mask_,
drawing_buffer_.Get());
ClearIfComposited();
ContextGL()->DrawElements(
mode, count, type,
reinterpret_cast<void*>(static_cast<intptr_t>(offset)));
MarkContextChanged(kCanvasChanged);
}
void WebGLRenderingContextBase::DrawArraysInstancedANGLE(GLenum mode,
GLint first,
GLsizei count,
GLsizei primcount) {
if (!ValidateDrawArrays("drawArraysInstancedANGLE"))
return;
if (!bound_vertex_array_object_->IsAllEnabledAttribBufferBound()) {
SynthesizeGLError(GL_INVALID_OPERATION, "drawArraysInstancedANGLE",
"no buffer is bound to enabled attribute");
return;
}
ScopedRGBEmulationColorMask emulation_color_mask(this, color_mask_,
drawing_buffer_.Get());
ClearIfComposited();
ContextGL()->DrawArraysInstancedANGLE(mode, first, count, primcount);
MarkContextChanged(kCanvasChanged);
}
void WebGLRenderingContextBase::DrawElementsInstancedANGLE(GLenum mode,
GLsizei count,
GLenum type,
long long offset,
GLsizei primcount) {
if (!ValidateDrawElements("drawElementsInstancedANGLE", type, offset))
return;
if (!bound_vertex_array_object_->IsAllEnabledAttribBufferBound()) {
SynthesizeGLError(GL_INVALID_OPERATION, "drawElementsInstancedANGLE",
"no buffer is bound to enabled attribute");
return;
}
ScopedRGBEmulationColorMask emulation_color_mask(this, color_mask_,
drawing_buffer_.Get());
ClearIfComposited();
ContextGL()->DrawElementsInstancedANGLE(
mode, count, type, reinterpret_cast<void*>(static_cast<intptr_t>(offset)),
primcount);
MarkContextChanged(kCanvasChanged);
}
void WebGLRenderingContextBase::enable(GLenum cap) {
if (isContextLost() || !ValidateCapability("enable", cap))
return;
if (cap == GL_STENCIL_TEST) {
stencil_enabled_ = true;
ApplyStencilTest();
return;
}
if (cap == GL_SCISSOR_TEST)
scissor_enabled_ = true;
ContextGL()->Enable(cap);
}
void WebGLRenderingContextBase::enableVertexAttribArray(GLuint index) {
if (isContextLost())
return;
if (index >= max_vertex_attribs_) {
SynthesizeGLError(GL_INVALID_VALUE, "enableVertexAttribArray",
"index out of range");
return;
}
bound_vertex_array_object_->SetAttribEnabled(index, true);
ContextGL()->EnableVertexAttribArray(index);
}
void WebGLRenderingContextBase::finish() {
if (isContextLost())
return;
ContextGL()->Flush(); // Intentionally a flush, not a finish.
}
void WebGLRenderingContextBase::flush() {
if (isContextLost())
return;
ContextGL()->Flush();
}
void WebGLRenderingContextBase::framebufferRenderbuffer(
GLenum target,
GLenum attachment,
GLenum renderbuffertarget,
WebGLRenderbuffer* buffer) {
if (isContextLost() || !ValidateFramebufferFuncParameters(
"framebufferRenderbuffer", target, attachment))
return;
if (renderbuffertarget != GL_RENDERBUFFER) {
SynthesizeGLError(GL_INVALID_ENUM, "framebufferRenderbuffer",
"invalid target");
return;
}
if (buffer && !buffer->Validate(ContextGroup(), this)) {
SynthesizeGLError(GL_INVALID_OPERATION, "framebufferRenderbuffer",
"no buffer or buffer not from this context");
return;
}
// Don't allow the default framebuffer to be mutated; all current
// implementations use an FBO internally in place of the default
// FBO.
WebGLFramebuffer* framebuffer_binding = GetFramebufferBinding(target);
if (!framebuffer_binding || !framebuffer_binding->Object()) {
SynthesizeGLError(GL_INVALID_OPERATION, "framebufferRenderbuffer",
"no framebuffer bound");
return;
}
framebuffer_binding->SetAttachmentForBoundFramebuffer(target, attachment,
buffer);
ApplyStencilTest();
}
void WebGLRenderingContextBase::framebufferTexture2D(GLenum target,
GLenum attachment,
GLenum textarget,
WebGLTexture* texture,
GLint level) {
if (isContextLost() || !ValidateFramebufferFuncParameters(
"framebufferTexture2D", target, attachment))
return;
if (texture && !texture->Validate(ContextGroup(), this)) {
SynthesizeGLError(GL_INVALID_OPERATION, "framebufferTexture2D",
"no texture or texture not from this context");
return;
}
// Don't allow the default framebuffer to be mutated; all current
// implementations use an FBO internally in place of the default
// FBO.
WebGLFramebuffer* framebuffer_binding = GetFramebufferBinding(target);
if (!framebuffer_binding || !framebuffer_binding->Object()) {
SynthesizeGLError(GL_INVALID_OPERATION, "framebufferTexture2D",
"no framebuffer bound");
return;
}
framebuffer_binding->SetAttachmentForBoundFramebuffer(
target, attachment, textarget, texture, level, 0);
ApplyStencilTest();
}
void WebGLRenderingContextBase::frontFace(GLenum mode) {
if (isContextLost())
return;
ContextGL()->FrontFace(mode);
}
void WebGLRenderingContextBase::generateMipmap(GLenum target) {
if (isContextLost())
return;
if (!ValidateTextureBinding("generateMipmap", target))
return;
ContextGL()->GenerateMipmap(target);
}
WebGLActiveInfo* WebGLRenderingContextBase::getActiveAttrib(
WebGLProgram* program,
GLuint index) {
if (isContextLost() || !ValidateWebGLObject("getActiveAttrib", program))
return nullptr;
GLuint program_id = ObjectNonZero(program);
GLint max_name_length = -1;
ContextGL()->GetProgramiv(program_id, GL_ACTIVE_ATTRIBUTE_MAX_LENGTH,
&max_name_length);
if (max_name_length < 0)
return nullptr;
if (max_name_length == 0) {
SynthesizeGLError(GL_INVALID_VALUE, "getActiveAttrib",
"no active attributes exist");
return nullptr;
}
LChar* name_ptr;
RefPtr<StringImpl> name_impl =
StringImpl::CreateUninitialized(max_name_length, name_ptr);
GLsizei length = 0;
GLint size = -1;
GLenum type = 0;
ContextGL()->GetActiveAttrib(program_id, index, max_name_length, &length,
&size, &type,
reinterpret_cast<GLchar*>(name_ptr));
if (size < 0)
return nullptr;
return WebGLActiveInfo::Create(name_impl->Substring(0, length), type, size);
}
WebGLActiveInfo* WebGLRenderingContextBase::getActiveUniform(
WebGLProgram* program,
GLuint index) {
if (isContextLost() || !ValidateWebGLObject("getActiveUniform", program))
return nullptr;
GLuint program_id = ObjectNonZero(program);
GLint max_name_length = -1;
ContextGL()->GetProgramiv(program_id, GL_ACTIVE_UNIFORM_MAX_LENGTH,
&max_name_length);
if (max_name_length < 0)
return nullptr;
if (max_name_length == 0) {
SynthesizeGLError(GL_INVALID_VALUE, "getActiveUniform",
"no active uniforms exist");
return nullptr;
}
LChar* name_ptr;
RefPtr<StringImpl> name_impl =
StringImpl::CreateUninitialized(max_name_length, name_ptr);
GLsizei length = 0;
GLint size = -1;
GLenum type = 0;
ContextGL()->GetActiveUniform(program_id, index, max_name_length, &length,
&size, &type,
reinterpret_cast<GLchar*>(name_ptr));
if (size < 0)
return nullptr;
return WebGLActiveInfo::Create(name_impl->Substring(0, length), type, size);
}
Nullable<HeapVector<Member<WebGLShader>>>
WebGLRenderingContextBase::getAttachedShaders(WebGLProgram* program) {
if (isContextLost() || !ValidateWebGLObject("getAttachedShaders", program))
return nullptr;
HeapVector<Member<WebGLShader>> shader_objects;
const GLenum kShaderType[] = {GL_VERTEX_SHADER, GL_FRAGMENT_SHADER};
for (unsigned i = 0; i < sizeof(kShaderType) / sizeof(GLenum); ++i) {
WebGLShader* shader = program->GetAttachedShader(kShaderType[i]);
if (shader)
shader_objects.push_back(shader);
}
return shader_objects;
}
GLint WebGLRenderingContextBase::getAttribLocation(WebGLProgram* program,
const String& name) {
if (isContextLost() || !ValidateWebGLObject("getAttribLocation", program))
return -1;
if (!ValidateLocationLength("getAttribLocation", name))
return -1;
if (!ValidateString("getAttribLocation", name))
return -1;
if (IsPrefixReserved(name))
return -1;
if (!program->LinkStatus(this)) {
SynthesizeGLError(GL_INVALID_OPERATION, "getAttribLocation",
"program not linked");
return 0;
}
return ContextGL()->GetAttribLocation(ObjectOrZero(program),
name.Utf8().Data());
}
bool WebGLRenderingContextBase::ValidateBufferTarget(const char* function_name,
GLenum target) {
switch (target) {
case GL_ARRAY_BUFFER:
case GL_ELEMENT_ARRAY_BUFFER:
return true;
default:
SynthesizeGLError(GL_INVALID_ENUM, function_name, "invalid target");
return false;
}
}
ScriptValue WebGLRenderingContextBase::getBufferParameter(
ScriptState* script_state,
GLenum target,
GLenum pname) {
if (isContextLost() || !ValidateBufferTarget("getBufferParameter", target))
return ScriptValue::CreateNull(script_state);
switch (pname) {
case GL_BUFFER_USAGE: {
GLint value = 0;
ContextGL()->GetBufferParameteriv(target, pname, &value);
return WebGLAny(script_state, static_cast<unsigned>(value));
}
case GL_BUFFER_SIZE: {
GLint value = 0;
ContextGL()->GetBufferParameteriv(target, pname, &value);
if (!IsWebGL2OrHigher())
return WebGLAny(script_state, value);
return WebGLAny(script_state, static_cast<GLint64>(value));
}
default:
SynthesizeGLError(GL_INVALID_ENUM, "getBufferParameter",
"invalid parameter name");
return ScriptValue::CreateNull(script_state);
}
}
void WebGLRenderingContextBase::getContextAttributes(
Nullable<WebGLContextAttributes>& result) {
if (isContextLost())
return;
result.Set(ToWebGLContextAttributes(CreationAttributes()));
// Some requested attributes may not be honored, so we need to query the
// underlying context/drawing buffer and adjust accordingly.
if (CreationAttributes().depth() && !GetDrawingBuffer()->HasDepthBuffer())
result.Get().setDepth(false);
if (CreationAttributes().stencil() && !GetDrawingBuffer()->HasStencilBuffer())
result.Get().setStencil(false);
result.Get().setAntialias(GetDrawingBuffer()->Multisample());
}
GLenum WebGLRenderingContextBase::getError() {
if (!lost_context_errors_.IsEmpty()) {
GLenum error = lost_context_errors_.front();
lost_context_errors_.erase(0);
return error;
}
if (isContextLost())
return GL_NO_ERROR;
if (!synthetic_errors_.IsEmpty()) {
GLenum error = synthetic_errors_.front();
synthetic_errors_.erase(0);
return error;
}
return ContextGL()->GetError();
}
const char* const* WebGLRenderingContextBase::ExtensionTracker::Prefixes()
const {
static const char* const kUnprefixed[] = {
"", 0,
};
return prefixes_ ? prefixes_ : kUnprefixed;
}
bool WebGLRenderingContextBase::ExtensionTracker::MatchesNameWithPrefixes(
const String& name) const {
const char* const* prefix_set = Prefixes();
for (; *prefix_set; ++prefix_set) {
String prefixed_name = String(*prefix_set) + ExtensionName();
if (DeprecatedEqualIgnoringCase(prefixed_name, name)) {
return true;
}
}
return false;
}
bool WebGLRenderingContextBase::ExtensionSupportedAndAllowed(
const ExtensionTracker* tracker) {
if (tracker->Draft() &&
!RuntimeEnabledFeatures::webGLDraftExtensionsEnabled())
return false;
if (!tracker->Supported(this))
return false;
return true;
}
ScriptValue WebGLRenderingContextBase::getExtension(ScriptState* script_state,
const String& name) {
WebGLExtension* extension = nullptr;
if (!isContextLost()) {
for (size_t i = 0; i < extensions_.size(); ++i) {
ExtensionTracker* tracker = extensions_[i];
if (tracker->MatchesNameWithPrefixes(name)) {
if (ExtensionSupportedAndAllowed(tracker)) {
extension = tracker->GetExtension(this);
if (extension) {
if (!extension_enabled_[extension->GetName()]) {
extension_enabled_[extension->GetName()] = true;
}
}
}
break;
}
}
}
v8::Local<v8::Value> wrapped_extension =
ToV8(extension, script_state->GetContext()->Global(),
script_state->GetIsolate());
return ScriptValue(script_state, wrapped_extension);
}
ScriptValue WebGLRenderingContextBase::getFramebufferAttachmentParameter(
ScriptState* script_state,
GLenum target,
GLenum attachment,
GLenum pname) {
if (isContextLost() ||
!ValidateFramebufferFuncParameters("getFramebufferAttachmentParameter",
target, attachment))
return ScriptValue::CreateNull(script_state);
if (!framebuffer_binding_ || !framebuffer_binding_->Object()) {
SynthesizeGLError(GL_INVALID_OPERATION, "getFramebufferAttachmentParameter",
"no framebuffer bound");
return ScriptValue::CreateNull(script_state);
}
WebGLSharedObject* attachment_object =
framebuffer_binding_->GetAttachmentObject(attachment);
if (!attachment_object) {
if (pname == GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE)
return WebGLAny(script_state, GL_NONE);
// OpenGL ES 2.0 specifies INVALID_ENUM in this case, while desktop GL
// specifies INVALID_OPERATION.
SynthesizeGLError(GL_INVALID_ENUM, "getFramebufferAttachmentParameter",
"invalid parameter name");
return ScriptValue::CreateNull(script_state);
}
ASSERT(attachment_object->IsTexture() || attachment_object->IsRenderbuffer());
if (attachment_object->IsTexture()) {
switch (pname) {
case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE:
return WebGLAny(script_state, GL_TEXTURE);
case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME:
return WebGLAny(script_state, attachment_object);
case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL:
case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE: {
GLint value = 0;
ContextGL()->GetFramebufferAttachmentParameteriv(target, attachment,
pname, &value);
return WebGLAny(script_state, value);
}
case GL_FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING_EXT:
if (ExtensionEnabled(kEXTsRGBName)) {
GLint value = 0;
ContextGL()->GetFramebufferAttachmentParameteriv(target, attachment,
pname, &value);
return WebGLAny(script_state, static_cast<unsigned>(value));
}
SynthesizeGLError(GL_INVALID_ENUM, "getFramebufferAttachmentParameter",
"invalid parameter name for renderbuffer attachment");
return ScriptValue::CreateNull(script_state);
default:
SynthesizeGLError(GL_INVALID_ENUM, "getFramebufferAttachmentParameter",
"invalid parameter name for texture attachment");
return ScriptValue::CreateNull(script_state);
}
} else {
switch (pname) {
case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE:
return WebGLAny(script_state, GL_RENDERBUFFER);
case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME:
return WebGLAny(script_state, attachment_object);
case GL_FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING_EXT:
if (ExtensionEnabled(kEXTsRGBName)) {
GLint value = 0;
ContextGL()->GetFramebufferAttachmentParameteriv(target, attachment,
pname, &value);
return WebGLAny(script_state, value);
}
SynthesizeGLError(GL_INVALID_ENUM, "getFramebufferAttachmentParameter",
"invalid parameter name for renderbuffer attachment");
return ScriptValue::CreateNull(script_state);
default:
SynthesizeGLError(GL_INVALID_ENUM, "getFramebufferAttachmentParameter",
"invalid parameter name for renderbuffer attachment");
return ScriptValue::CreateNull(script_state);
}
}
}
ScriptValue WebGLRenderingContextBase::getParameter(ScriptState* script_state,
GLenum pname) {
if (isContextLost())
return ScriptValue::CreateNull(script_state);
const int kIntZero = 0;
switch (pname) {
case GL_ACTIVE_TEXTURE:
return GetUnsignedIntParameter(script_state, pname);
case GL_ALIASED_LINE_WIDTH_RANGE:
return GetWebGLFloatArrayParameter(script_state, pname);
case GL_ALIASED_POINT_SIZE_RANGE:
return GetWebGLFloatArrayParameter(script_state, pname);
case GL_ALPHA_BITS:
if (drawing_buffer_->RequiresAlphaChannelToBePreserved())
return WebGLAny(script_state, 0);
return GetIntParameter(script_state, pname);
case GL_ARRAY_BUFFER_BINDING:
return WebGLAny(script_state, bound_array_buffer_.Get());
case GL_BLEND:
return GetBooleanParameter(script_state, pname);
case GL_BLEND_COLOR:
return GetWebGLFloatArrayParameter(script_state, pname);
case GL_BLEND_DST_ALPHA:
return GetUnsignedIntParameter(script_state, pname);
case GL_BLEND_DST_RGB:
return GetUnsignedIntParameter(script_state, pname);
case GL_BLEND_EQUATION_ALPHA:
return GetUnsignedIntParameter(script_state, pname);
case GL_BLEND_EQUATION_RGB:
return GetUnsignedIntParameter(script_state, pname);
case GL_BLEND_SRC_ALPHA:
return GetUnsignedIntParameter(script_state, pname);
case GL_BLEND_SRC_RGB:
return GetUnsignedIntParameter(script_state, pname);
case GL_BLUE_BITS:
return GetIntParameter(script_state, pname);
case GL_COLOR_CLEAR_VALUE:
return GetWebGLFloatArrayParameter(script_state, pname);
case GL_COLOR_WRITEMASK:
return GetBooleanArrayParameter(script_state, pname);
case GL_COMPRESSED_TEXTURE_FORMATS:
return WebGLAny(script_state, DOMUint32Array::Create(
compressed_texture_formats_.Data(),
compressed_texture_formats_.size()));
case GL_CULL_FACE:
return GetBooleanParameter(script_state, pname);
case GL_CULL_FACE_MODE:
return GetUnsignedIntParameter(script_state, pname);
case GL_CURRENT_PROGRAM:
return WebGLAny(script_state, current_program_.Get());
case GL_DEPTH_BITS:
if (!framebuffer_binding_ && !CreationAttributes().depth())
return WebGLAny(script_state, kIntZero);
return GetIntParameter(script_state, pname);
case GL_DEPTH_CLEAR_VALUE:
return GetFloatParameter(script_state, pname);
case GL_DEPTH_FUNC:
return GetUnsignedIntParameter(script_state, pname);
case GL_DEPTH_RANGE:
return GetWebGLFloatArrayParameter(script_state, pname);
case GL_DEPTH_TEST:
return GetBooleanParameter(script_state, pname);
case GL_DEPTH_WRITEMASK:
return GetBooleanParameter(script_state, pname);
case GL_DITHER:
return GetBooleanParameter(script_state, pname);
case GL_ELEMENT_ARRAY_BUFFER_BINDING:
return WebGLAny(script_state,
bound_vertex_array_object_->BoundElementArrayBuffer());
case GL_FRAMEBUFFER_BINDING:
return WebGLAny(script_state, framebuffer_binding_.Get());
case GL_FRONT_FACE:
return GetUnsignedIntParameter(script_state, pname);
case GL_GENERATE_MIPMAP_HINT:
return GetUnsignedIntParameter(script_state, pname);
case GL_GREEN_BITS:
return GetIntParameter(script_state, pname);
case GL_IMPLEMENTATION_COLOR_READ_FORMAT:
return GetIntParameter(script_state, pname);
case GL_IMPLEMENTATION_COLOR_READ_TYPE:
return GetIntParameter(script_state, pname);
case GL_LINE_WIDTH:
return GetFloatParameter(script_state, pname);
case GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS:
return GetIntParameter(script_state, pname);
case GL_MAX_CUBE_MAP_TEXTURE_SIZE:
return GetIntParameter(script_state, pname);
case GL_MAX_FRAGMENT_UNIFORM_VECTORS:
return GetIntParameter(script_state, pname);
case GL_MAX_RENDERBUFFER_SIZE:
return GetIntParameter(script_state, pname);
case GL_MAX_TEXTURE_IMAGE_UNITS:
return GetIntParameter(script_state, pname);
case GL_MAX_TEXTURE_SIZE:
return GetIntParameter(script_state, pname);
case GL_MAX_VARYING_VECTORS:
return GetIntParameter(script_state, pname);
case GL_MAX_VERTEX_ATTRIBS:
return GetIntParameter(script_state, pname);
case GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS:
return GetIntParameter(script_state, pname);
case GL_MAX_VERTEX_UNIFORM_VECTORS:
return GetIntParameter(script_state, pname);
case GL_MAX_VIEWPORT_DIMS:
return GetWebGLIntArrayParameter(script_state, pname);
case GL_NUM_SHADER_BINARY_FORMATS:
// FIXME: should we always return 0 for this?
return GetIntParameter(script_state, pname);
case GL_PACK_ALIGNMENT:
return GetIntParameter(script_state, pname);
case GL_POLYGON_OFFSET_FACTOR:
return GetFloatParameter(script_state, pname);
case GL_POLYGON_OFFSET_FILL:
return GetBooleanParameter(script_state, pname);
case GL_POLYGON_OFFSET_UNITS:
return GetFloatParameter(script_state, pname);
case GL_RED_BITS:
return GetIntParameter(script_state, pname);
case GL_RENDERBUFFER_BINDING:
return WebGLAny(script_state, renderbuffer_binding_.Get());
case GL_RENDERER:
return WebGLAny(script_state, String("WebKit WebGL"));
case GL_SAMPLE_BUFFERS:
return GetIntParameter(script_state, pname);
case GL_SAMPLE_COVERAGE_INVERT:
return GetBooleanParameter(script_state, pname);
case GL_SAMPLE_COVERAGE_VALUE:
return GetFloatParameter(script_state, pname);
case GL_SAMPLES:
return GetIntParameter(script_state, pname);
case GL_SCISSOR_BOX:
return GetWebGLIntArrayParameter(script_state, pname);
case GL_SCISSOR_TEST:
return GetBooleanParameter(script_state, pname);
case GL_SHADING_LANGUAGE_VERSION:
return WebGLAny(
script_state,
"WebGL GLSL ES 1.0 (" +
String(ContextGL()->GetString(GL_SHADING_LANGUAGE_VERSION)) +
")");
case GL_STENCIL_BACK_FAIL:
return GetUnsignedIntParameter(script_state, pname);
case GL_STENCIL_BACK_FUNC:
return GetUnsignedIntParameter(script_state, pname);
case GL_STENCIL_BACK_PASS_DEPTH_FAIL:
return GetUnsignedIntParameter(script_state, pname);
case GL_STENCIL_BACK_PASS_DEPTH_PASS:
return GetUnsignedIntParameter(script_state, pname);
case GL_STENCIL_BACK_REF:
return GetIntParameter(script_state, pname);
case GL_STENCIL_BACK_VALUE_MASK:
return GetUnsignedIntParameter(script_state, pname);
case GL_STENCIL_BACK_WRITEMASK:
return GetUnsignedIntParameter(script_state, pname);
case GL_STENCIL_BITS:
if (!framebuffer_binding_ && !CreationAttributes().stencil())
return WebGLAny(script_state, kIntZero);
return GetIntParameter(script_state, pname);
case GL_STENCIL_CLEAR_VALUE:
return GetIntParameter(script_state, pname);
case GL_STENCIL_FAIL:
return GetUnsignedIntParameter(script_state, pname);
case GL_STENCIL_FUNC:
return GetUnsignedIntParameter(script_state, pname);
case GL_STENCIL_PASS_DEPTH_FAIL:
return GetUnsignedIntParameter(script_state, pname);
case GL_STENCIL_PASS_DEPTH_PASS:
return GetUnsignedIntParameter(script_state, pname);
case GL_STENCIL_REF:
return GetIntParameter(script_state, pname);
case GL_STENCIL_TEST:
return GetBooleanParameter(script_state, pname);
case GL_STENCIL_VALUE_MASK:
return GetUnsignedIntParameter(script_state, pname);
case GL_STENCIL_WRITEMASK:
return GetUnsignedIntParameter(script_state, pname);
case GL_SUBPIXEL_BITS:
return GetIntParameter(script_state, pname);
case GL_TEXTURE_BINDING_2D:
return WebGLAny(
script_state,
texture_units_[active_texture_unit_].texture2d_binding_.Get());
case GL_TEXTURE_BINDING_CUBE_MAP:
return WebGLAny(
script_state,
texture_units_[active_texture_unit_].texture_cube_map_binding_.Get());
case GL_UNPACK_ALIGNMENT:
return GetIntParameter(script_state, pname);
case GC3D_UNPACK_FLIP_Y_WEBGL:
return WebGLAny(script_state, unpack_flip_y_);
case GC3D_UNPACK_PREMULTIPLY_ALPHA_WEBGL:
return WebGLAny(script_state, unpack_premultiply_alpha_);
case GC3D_UNPACK_COLORSPACE_CONVERSION_WEBGL:
return WebGLAny(script_state, unpack_colorspace_conversion_);
case GL_VENDOR:
return WebGLAny(script_state, String("WebKit"));
case GL_VERSION:
return WebGLAny(
script_state,
"WebGL 1.0 (" + String(ContextGL()->GetString(GL_VERSION)) + ")");
case GL_VIEWPORT:
return GetWebGLIntArrayParameter(script_state, pname);
case GL_FRAGMENT_SHADER_DERIVATIVE_HINT_OES: // OES_standard_derivatives
if (ExtensionEnabled(kOESStandardDerivativesName) || IsWebGL2OrHigher())
return GetUnsignedIntParameter(script_state,
GL_FRAGMENT_SHADER_DERIVATIVE_HINT_OES);
SynthesizeGLError(
GL_INVALID_ENUM, "getParameter",
"invalid parameter name, OES_standard_derivatives not enabled");
return ScriptValue::CreateNull(script_state);
case WebGLDebugRendererInfo::kUnmaskedRendererWebgl:
if (ExtensionEnabled(kWebGLDebugRendererInfoName))
return WebGLAny(script_state,
String(ContextGL()->GetString(GL_RENDERER)));
SynthesizeGLError(
GL_INVALID_ENUM, "getParameter",
"invalid parameter name, WEBGL_debug_renderer_info not enabled");
return ScriptValue::CreateNull(script_state);
case WebGLDebugRendererInfo::kUnmaskedVendorWebgl:
if (ExtensionEnabled(kWebGLDebugRendererInfoName))
return WebGLAny(script_state,
String(ContextGL()->GetString(GL_VENDOR)));
SynthesizeGLError(
GL_INVALID_ENUM, "getParameter",
"invalid parameter name, WEBGL_debug_renderer_info not enabled");
return ScriptValue::CreateNull(script_state);
case GL_VERTEX_ARRAY_BINDING_OES: // OES_vertex_array_object
if (ExtensionEnabled(kOESVertexArrayObjectName) || IsWebGL2OrHigher()) {
if (!bound_vertex_array_object_->IsDefaultObject())
return WebGLAny(script_state, bound_vertex_array_object_.Get());
return ScriptValue::CreateNull(script_state);
}
SynthesizeGLError(
GL_INVALID_ENUM, "getParameter",
"invalid parameter name, OES_vertex_array_object not enabled");
return ScriptValue::CreateNull(script_state);
case GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT: // EXT_texture_filter_anisotropic
if (ExtensionEnabled(kEXTTextureFilterAnisotropicName))
return GetUnsignedIntParameter(script_state,
GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT);
SynthesizeGLError(
GL_INVALID_ENUM, "getParameter",
"invalid parameter name, EXT_texture_filter_anisotropic not enabled");
return ScriptValue::CreateNull(script_state);
case GL_MAX_COLOR_ATTACHMENTS_EXT: // EXT_draw_buffers BEGIN
if (ExtensionEnabled(kWebGLDrawBuffersName) || IsWebGL2OrHigher())
return WebGLAny(script_state, MaxColorAttachments());
SynthesizeGLError(
GL_INVALID_ENUM, "getParameter",
"invalid parameter name, WEBGL_draw_buffers not enabled");
return ScriptValue::CreateNull(script_state);
case GL_MAX_DRAW_BUFFERS_EXT:
if (ExtensionEnabled(kWebGLDrawBuffersName) || IsWebGL2OrHigher())
return WebGLAny(script_state, MaxDrawBuffers());
SynthesizeGLError(
GL_INVALID_ENUM, "getParameter",
"invalid parameter name, WEBGL_draw_buffers not enabled");
return ScriptValue::CreateNull(script_state);
case GL_TIMESTAMP_EXT:
if (ExtensionEnabled(kEXTDisjointTimerQueryName))
return WebGLAny(script_state, 0);
SynthesizeGLError(
GL_INVALID_ENUM, "getParameter",
"invalid parameter name, EXT_disjoint_timer_query not enabled");
return ScriptValue::CreateNull(script_state);
case GL_GPU_DISJOINT_EXT:
if (ExtensionEnabled(kEXTDisjointTimerQueryName))
return GetBooleanParameter(script_state, GL_GPU_DISJOINT_EXT);
SynthesizeGLError(
GL_INVALID_ENUM, "getParameter",
"invalid parameter name, EXT_disjoint_timer_query not enabled");
return ScriptValue::CreateNull(script_state);
default:
if ((ExtensionEnabled(kWebGLDrawBuffersName) || IsWebGL2OrHigher()) &&
pname >= GL_DRAW_BUFFER0_EXT &&
pname < static_cast<GLenum>(GL_DRAW_BUFFER0_EXT + MaxDrawBuffers())) {
GLint value = GL_NONE;
if (framebuffer_binding_)
value = framebuffer_binding_->GetDrawBuffer(pname);
else // emulated backbuffer
value = back_draw_buffer_;
return WebGLAny(script_state, value);
}
SynthesizeGLError(GL_INVALID_ENUM, "getParameter",
"invalid parameter name");
return ScriptValue::CreateNull(script_state);
}
}
ScriptValue WebGLRenderingContextBase::getProgramParameter(
ScriptState* script_state,
WebGLProgram* program,
GLenum pname) {
if (isContextLost() || !ValidateWebGLObject("getProgramParameter", program))
return ScriptValue::CreateNull(script_state);
GLint value = 0;
switch (pname) {
case GL_DELETE_STATUS:
return WebGLAny(script_state, program->IsDeleted());
case GL_VALIDATE_STATUS:
ContextGL()->GetProgramiv(ObjectOrZero(program), pname, &value);
return WebGLAny(script_state, static_cast<bool>(value));
case GL_LINK_STATUS:
return WebGLAny(script_state, program->LinkStatus(this));
case GL_ACTIVE_UNIFORM_BLOCKS:
case GL_TRANSFORM_FEEDBACK_VARYINGS:
if (!IsWebGL2OrHigher()) {
SynthesizeGLError(GL_INVALID_ENUM, "getProgramParameter",
"invalid parameter name");
return ScriptValue::CreateNull(script_state);
}
case GL_ATTACHED_SHADERS:
case GL_ACTIVE_ATTRIBUTES:
case GL_ACTIVE_UNIFORMS:
ContextGL()->GetProgramiv(ObjectOrZero(program), pname, &value);
return WebGLAny(script_state, value);
case GL_TRANSFORM_FEEDBACK_BUFFER_MODE:
if (IsWebGL2OrHigher()) {
ContextGL()->GetProgramiv(ObjectOrZero(program), pname, &value);
return WebGLAny(script_state, static_cast<unsigned>(value));
}
default:
SynthesizeGLError(GL_INVALID_ENUM, "getProgramParameter",
"invalid parameter name");
return ScriptValue::CreateNull(script_state);
}
}
String WebGLRenderingContextBase::getProgramInfoLog(WebGLProgram* program) {
if (isContextLost() || !ValidateWebGLObject("getProgramInfoLog", program))
return String();
GLStringQuery query(ContextGL());
return query.Run<GLStringQuery::ProgramInfoLog>(ObjectNonZero(program));
}
ScriptValue WebGLRenderingContextBase::getRenderbufferParameter(
ScriptState* script_state,
GLenum target,
GLenum pname) {
if (isContextLost())
return ScriptValue::CreateNull(script_state);
if (target != GL_RENDERBUFFER) {
SynthesizeGLError(GL_INVALID_ENUM, "getRenderbufferParameter",
"invalid target");
return ScriptValue::CreateNull(script_state);
}
if (!renderbuffer_binding_ || !renderbuffer_binding_->Object()) {
SynthesizeGLError(GL_INVALID_OPERATION, "getRenderbufferParameter",
"no renderbuffer bound");
return ScriptValue::CreateNull(script_state);
}
GLint value = 0;
switch (pname) {
case GL_RENDERBUFFER_SAMPLES:
if (!IsWebGL2OrHigher()) {
SynthesizeGLError(GL_INVALID_ENUM, "getRenderbufferParameter",
"invalid parameter name");
return ScriptValue::CreateNull(script_state);
}
case GL_RENDERBUFFER_WIDTH:
case GL_RENDERBUFFER_HEIGHT:
case GL_RENDERBUFFER_RED_SIZE:
case GL_RENDERBUFFER_GREEN_SIZE:
case GL_RENDERBUFFER_BLUE_SIZE:
case GL_RENDERBUFFER_ALPHA_SIZE:
case GL_RENDERBUFFER_DEPTH_SIZE:
ContextGL()->GetRenderbufferParameteriv(target, pname, &value);
return WebGLAny(script_state, value);
case GL_RENDERBUFFER_STENCIL_SIZE:
ContextGL()->GetRenderbufferParameteriv(target, pname, &value);
return WebGLAny(script_state, value);
case GL_RENDERBUFFER_INTERNAL_FORMAT:
return WebGLAny(script_state, renderbuffer_binding_->InternalFormat());
default:
SynthesizeGLError(GL_INVALID_ENUM, "getRenderbufferParameter",
"invalid parameter name");
return ScriptValue::CreateNull(script_state);
}
}
ScriptValue WebGLRenderingContextBase::getShaderParameter(
ScriptState* script_state,
WebGLShader* shader,
GLenum pname) {
if (isContextLost() || !ValidateWebGLObject("getShaderParameter", shader))
return ScriptValue::CreateNull(script_state);
GLint value = 0;
switch (pname) {
case GL_DELETE_STATUS:
return WebGLAny(script_state, shader->IsDeleted());
case GL_COMPILE_STATUS:
ContextGL()->GetShaderiv(ObjectOrZero(shader), pname, &value);
return WebGLAny(script_state, static_cast<bool>(value));
case GL_SHADER_TYPE:
ContextGL()->GetShaderiv(ObjectOrZero(shader), pname, &value);
return WebGLAny(script_state, static_cast<unsigned>(value));
default:
SynthesizeGLError(GL_INVALID_ENUM, "getShaderParameter",
"invalid parameter name");
return ScriptValue::CreateNull(script_state);
}
}
String WebGLRenderingContextBase::getShaderInfoLog(WebGLShader* shader) {
if (isContextLost() || !ValidateWebGLObject("getShaderInfoLog", shader))
return String();
GLStringQuery query(ContextGL());
return query.Run<GLStringQuery::ShaderInfoLog>(ObjectNonZero(shader));
}
WebGLShaderPrecisionFormat* WebGLRenderingContextBase::getShaderPrecisionFormat(
GLenum shader_type,
GLenum precision_type) {
if (isContextLost())
return nullptr;
switch (shader_type) {
case GL_VERTEX_SHADER:
case GL_FRAGMENT_SHADER:
break;
default:
SynthesizeGLError(GL_INVALID_ENUM, "getShaderPrecisionFormat",
"invalid shader type");
return nullptr;
}
switch (precision_type) {
case GL_LOW_FLOAT:
case GL_MEDIUM_FLOAT:
case GL_HIGH_FLOAT:
case GL_LOW_INT:
case GL_MEDIUM_INT:
case GL_HIGH_INT:
break;
default:
SynthesizeGLError(GL_INVALID_ENUM, "getShaderPrecisionFormat",
"invalid precision type");
return nullptr;
}
GLint range[2] = {0, 0};
GLint precision = 0;
ContextGL()->GetShaderPrecisionFormat(shader_type, precision_type, range,
&precision);
return WebGLShaderPrecisionFormat::Create(range[0], range[1], precision);
}
String WebGLRenderingContextBase::getShaderSource(WebGLShader* shader) {
if (isContextLost() || !ValidateWebGLObject("getShaderSource", shader))
return String();
return EnsureNotNull(shader->Source());
}
Nullable<Vector<String>> WebGLRenderingContextBase::getSupportedExtensions() {
if (isContextLost())
return nullptr;
Vector<String> result;
for (size_t i = 0; i < extensions_.size(); ++i) {
ExtensionTracker* tracker = extensions_[i].Get();
if (ExtensionSupportedAndAllowed(tracker)) {
const char* const* prefixes = tracker->Prefixes();
for (; *prefixes; ++prefixes) {
String prefixed_name = String(*prefixes) + tracker->ExtensionName();
result.push_back(prefixed_name);
}
}
}
return result;
}
ScriptValue WebGLRenderingContextBase::getTexParameter(
ScriptState* script_state,
GLenum target,
GLenum pname) {
if (isContextLost())
return ScriptValue::CreateNull(script_state);
if (!ValidateTextureBinding("getTexParameter", target))
return ScriptValue::CreateNull(script_state);
switch (pname) {
case GL_TEXTURE_MAG_FILTER:
case GL_TEXTURE_MIN_FILTER:
case GL_TEXTURE_WRAP_S:
case GL_TEXTURE_WRAP_T: {
GLint value = 0;
ContextGL()->GetTexParameteriv(target, pname, &value);
return WebGLAny(script_state, static_cast<unsigned>(value));
}
case GL_TEXTURE_MAX_ANISOTROPY_EXT: // EXT_texture_filter_anisotropic
if (ExtensionEnabled(kEXTTextureFilterAnisotropicName)) {
GLfloat value = 0.f;
ContextGL()->GetTexParameterfv(target, pname, &value);
return WebGLAny(script_state, value);
}
SynthesizeGLError(
GL_INVALID_ENUM, "getTexParameter",
"invalid parameter name, EXT_texture_filter_anisotropic not enabled");
return ScriptValue::CreateNull(script_state);
default:
SynthesizeGLError(GL_INVALID_ENUM, "getTexParameter",
"invalid parameter name");
return ScriptValue::CreateNull(script_state);
}
}
ScriptValue WebGLRenderingContextBase::getUniform(
ScriptState* script_state,
WebGLProgram* program,
const WebGLUniformLocation* uniform_location) {
if (isContextLost() || !ValidateWebGLObject("getUniform", program))
return ScriptValue::CreateNull(script_state);
DCHECK(uniform_location);
if (uniform_location->Program() != program) {
SynthesizeGLError(GL_INVALID_OPERATION, "getUniform",
"no uniformlocation or not valid for this program");
return ScriptValue::CreateNull(script_state);
}
GLint location = uniform_location->Location();
GLuint program_id = ObjectNonZero(program);
GLint max_name_length = -1;
ContextGL()->GetProgramiv(program_id, GL_ACTIVE_UNIFORM_MAX_LENGTH,
&max_name_length);
if (max_name_length < 0)
return ScriptValue::CreateNull(script_state);
if (max_name_length == 0) {
SynthesizeGLError(GL_INVALID_VALUE, "getUniform",
"no active uniforms exist");
return ScriptValue::CreateNull(script_state);
}
// FIXME: make this more efficient using WebGLUniformLocation and caching
// types in it.
GLint active_uniforms = 0;
ContextGL()->GetProgramiv(program_id, GL_ACTIVE_UNIFORMS, &active_uniforms);
for (GLint i = 0; i < active_uniforms; i++) {
LChar* name_ptr;
RefPtr<StringImpl> name_impl =
StringImpl::CreateUninitialized(max_name_length, name_ptr);
GLsizei length = 0;
GLint size = -1;
GLenum type = 0;
ContextGL()->GetActiveUniform(program_id, i, max_name_length, &length,
&size, &type,
reinterpret_cast<GLchar*>(name_ptr));
if (size < 0)
return ScriptValue::CreateNull(script_state);
String name(name_impl->Substring(0, length));
StringBuilder name_builder;
// Strip "[0]" from the name if it's an array.
if (size > 1 && name.EndsWith("[0]"))
name = name.Left(name.length() - 3);
// If it's an array, we need to iterate through each element, appending
// "[index]" to the name.
for (GLint index = 0; index < size; ++index) {
name_builder.Clear();
name_builder.Append(name);
if (size > 1 && index >= 1) {
name_builder.Append('[');
name_builder.AppendNumber(index);
name_builder.Append(']');
}
// Now need to look this up by name again to find its location
GLint loc = ContextGL()->GetUniformLocation(
ObjectOrZero(program), name_builder.ToString().Utf8().Data());
if (loc == location) {
// Found it. Use the type in the ActiveInfo to determine the return
// type.
GLenum base_type;
unsigned length;
switch (type) {
case GL_BOOL:
base_type = GL_BOOL;
length = 1;
break;
case GL_BOOL_VEC2:
base_type = GL_BOOL;
length = 2;
break;
case GL_BOOL_VEC3:
base_type = GL_BOOL;
length = 3;
break;
case GL_BOOL_VEC4:
base_type = GL_BOOL;
length = 4;
break;
case GL_INT:
base_type = GL_INT;
length = 1;
break;
case GL_INT_VEC2:
base_type = GL_INT;
length = 2;
break;
case GL_INT_VEC3:
base_type = GL_INT;
length = 3;
break;
case GL_INT_VEC4:
base_type = GL_INT;
length = 4;
break;
case GL_FLOAT:
base_type = GL_FLOAT;
length = 1;
break;
case GL_FLOAT_VEC2:
base_type = GL_FLOAT;
length = 2;
break;
case GL_FLOAT_VEC3:
base_type = GL_FLOAT;
length = 3;
break;
case GL_FLOAT_VEC4:
base_type = GL_FLOAT;
length = 4;
break;
case GL_FLOAT_MAT2:
base_type = GL_FLOAT;
length = 4;
break;
case GL_FLOAT_MAT3:
base_type = GL_FLOAT;
length = 9;
break;
case GL_FLOAT_MAT4:
base_type = GL_FLOAT;
length = 16;
break;
case GL_SAMPLER_2D:
case GL_SAMPLER_CUBE:
base_type = GL_INT;
length = 1;
break;
default:
if (!IsWebGL2OrHigher()) {
// Can't handle this type
SynthesizeGLError(GL_INVALID_VALUE, "getUniform",
"unhandled type");
return ScriptValue::CreateNull(script_state);
}
// handle GLenums for WebGL 2.0 or higher
switch (type) {
case GL_UNSIGNED_INT:
base_type = GL_UNSIGNED_INT;
length = 1;
break;
case GL_UNSIGNED_INT_VEC2:
base_type = GL_UNSIGNED_INT;
length = 2;
break;
case GL_UNSIGNED_INT_VEC3:
base_type = GL_UNSIGNED_INT;
length = 3;
break;
case GL_UNSIGNED_INT_VEC4:
base_type = GL_UNSIGNED_INT;
length = 4;
break;
case GL_FLOAT_MAT2x3:
base_type = GL_FLOAT;
length = 6;
break;
case GL_FLOAT_MAT2x4:
base_type = GL_FLOAT;
length = 8;
break;
case GL_FLOAT_MAT3x2:
base_type = GL_FLOAT;
length = 6;
break;
case GL_FLOAT_MAT3x4:
base_type = GL_FLOAT;
length = 12;
break;
case GL_FLOAT_MAT4x2:
base_type = GL_FLOAT;
length = 8;
break;
case GL_FLOAT_MAT4x3:
base_type = GL_FLOAT;
length = 12;
break;
case GL_SAMPLER_3D:
case GL_SAMPLER_2D_ARRAY:
case GL_SAMPLER_2D_SHADOW:
case GL_SAMPLER_CUBE_SHADOW:
case GL_SAMPLER_2D_ARRAY_SHADOW:
case GL_INT_SAMPLER_2D:
case GL_INT_SAMPLER_CUBE:
case GL_INT_SAMPLER_3D:
case GL_INT_SAMPLER_2D_ARRAY:
case GL_UNSIGNED_INT_SAMPLER_2D:
case GL_UNSIGNED_INT_SAMPLER_CUBE:
case GL_UNSIGNED_INT_SAMPLER_3D:
case GL_UNSIGNED_INT_SAMPLER_2D_ARRAY:
base_type = GL_INT;
length = 1;
break;
default:
// Can't handle this type
SynthesizeGLError(GL_INVALID_VALUE, "getUniform",
"unhandled type");
return ScriptValue::CreateNull(script_state);
}
}
switch (base_type) {
case GL_FLOAT: {
GLfloat value[16] = {0};
ContextGL()->GetUniformfv(ObjectOrZero(program), location, value);
if (length == 1)
return WebGLAny(script_state, value[0]);
return WebGLAny(script_state,
DOMFloat32Array::Create(value, length));
}
case GL_INT: {
GLint value[4] = {0};
ContextGL()->GetUniformiv(ObjectOrZero(program), location, value);
if (length == 1)
return WebGLAny(script_state, value[0]);
return WebGLAny(script_state, DOMInt32Array::Create(value, length));
}
case GL_UNSIGNED_INT: {
GLuint value[4] = {0};
ContextGL()->GetUniformuiv(ObjectOrZero(program), location, value);
if (length == 1)
return WebGLAny(script_state, value[0]);
return WebGLAny(script_state,
DOMUint32Array::Create(value, length));
}
case GL_BOOL: {
GLint value[4] = {0};
ContextGL()->GetUniformiv(ObjectOrZero(program), location, value);
if (length > 1) {
bool bool_value[16] = {0};
for (unsigned j = 0; j < length; j++)
bool_value[j] = static_cast<bool>(value[j]);
return WebGLAny(script_state, bool_value, length);
}
return WebGLAny(script_state, static_cast<bool>(value[0]));
}
default:
NOTIMPLEMENTED();
}
}
}
}
// If we get here, something went wrong in our unfortunately complex logic
// above
SynthesizeGLError(GL_INVALID_VALUE, "getUniform", "unknown error");
return ScriptValue::CreateNull(script_state);
}
WebGLUniformLocation* WebGLRenderingContextBase::getUniformLocation(
WebGLProgram* program,
const String& name) {
if (isContextLost() || !ValidateWebGLObject("getUniformLocation", program))
return nullptr;
if (!ValidateLocationLength("getUniformLocation", name))
return nullptr;
if (!ValidateString("getUniformLocation", name))
return nullptr;
if (IsPrefixReserved(name))
return nullptr;
if (!program->LinkStatus(this)) {
SynthesizeGLError(GL_INVALID_OPERATION, "getUniformLocation",
"program not linked");
return nullptr;
}
GLint uniform_location = ContextGL()->GetUniformLocation(
ObjectOrZero(program), name.Utf8().Data());
if (uniform_location == -1)
return nullptr;
return WebGLUniformLocation::Create(program, uniform_location);
}
ScriptValue WebGLRenderingContextBase::getVertexAttrib(
ScriptState* script_state,
GLuint index,
GLenum pname) {
if (isContextLost())
return ScriptValue::CreateNull(script_state);
if (index >= max_vertex_attribs_) {
SynthesizeGLError(GL_INVALID_VALUE, "getVertexAttrib",
"index out of range");
return ScriptValue::CreateNull(script_state);
}
if ((ExtensionEnabled(kANGLEInstancedArraysName) || IsWebGL2OrHigher()) &&
pname == GL_VERTEX_ATTRIB_ARRAY_DIVISOR_ANGLE) {
GLint value = 0;
ContextGL()->GetVertexAttribiv(index, pname, &value);
return WebGLAny(script_state, value);
}
switch (pname) {
case GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING:
return WebGLAny(
script_state,
bound_vertex_array_object_->GetArrayBufferForAttrib(index));
case GL_VERTEX_ATTRIB_ARRAY_ENABLED:
case GL_VERTEX_ATTRIB_ARRAY_NORMALIZED: {
GLint value = 0;
ContextGL()->GetVertexAttribiv(index, pname, &value);
return WebGLAny(script_state, static_cast<bool>(value));
}
case GL_VERTEX_ATTRIB_ARRAY_SIZE:
case GL_VERTEX_ATTRIB_ARRAY_STRIDE: {
GLint value = 0;
ContextGL()->GetVertexAttribiv(index, pname, &value);
return WebGLAny(script_state, value);
}
case GL_VERTEX_ATTRIB_ARRAY_TYPE: {
GLint value = 0;
ContextGL()->GetVertexAttribiv(index, pname, &value);
return WebGLAny(script_state, static_cast<GLenum>(value));
}
case GL_CURRENT_VERTEX_ATTRIB: {
switch (vertex_attrib_type_[index]) {
case kFloat32ArrayType: {
GLfloat float_value[4];
ContextGL()->GetVertexAttribfv(index, pname, float_value);
return WebGLAny(script_state,
DOMFloat32Array::Create(float_value, 4));
}
case kInt32ArrayType: {
GLint int_value[4];
ContextGL()->GetVertexAttribIiv(index, pname, int_value);
return WebGLAny(script_state, DOMInt32Array::Create(int_value, 4));
}
case kUint32ArrayType: {
GLuint uint_value[4];
ContextGL()->GetVertexAttribIuiv(index, pname, uint_value);
return WebGLAny(script_state, DOMUint32Array::Create(uint_value, 4));
}
default:
ASSERT_NOT_REACHED();
break;
}
return ScriptValue::CreateNull(script_state);
}
case GL_VERTEX_ATTRIB_ARRAY_INTEGER:
if (IsWebGL2OrHigher()) {
GLint value = 0;
ContextGL()->GetVertexAttribiv(index, pname, &value);
return WebGLAny(script_state, static_cast<bool>(value));
}
// fall through to default error case
default:
SynthesizeGLError(GL_INVALID_ENUM, "getVertexAttrib",
"invalid parameter name");
return ScriptValue::CreateNull(script_state);
}
}
long long WebGLRenderingContextBase::getVertexAttribOffset(GLuint index,
GLenum pname) {
if (isContextLost())
return 0;
GLvoid* result = nullptr;
// NOTE: If pname is ever a value that returns more than 1 element
// this will corrupt memory.
ContextGL()->GetVertexAttribPointerv(index, pname, &result);
return static_cast<long long>(reinterpret_cast<intptr_t>(result));
}
void WebGLRenderingContextBase::hint(GLenum target, GLenum mode) {
if (isContextLost())
return;
bool is_valid = false;
switch (target) {
case GL_GENERATE_MIPMAP_HINT:
is_valid = true;
break;
case GL_FRAGMENT_SHADER_DERIVATIVE_HINT_OES: // OES_standard_derivatives
if (ExtensionEnabled(kOESStandardDerivativesName) || IsWebGL2OrHigher())
is_valid = true;
break;
}
if (!is_valid) {
SynthesizeGLError(GL_INVALID_ENUM, "hint", "invalid target");
return;
}
ContextGL()->Hint(target, mode);
}
GLboolean WebGLRenderingContextBase::isBuffer(WebGLBuffer* buffer) {
if (!buffer || isContextLost())
return 0;
if (!buffer->HasEverBeenBound())
return 0;
if (buffer->IsDeleted())
return 0;
return ContextGL()->IsBuffer(buffer->Object());
}
bool WebGLRenderingContextBase::isContextLost() const {
return context_lost_mode_ != kNotLostContext;
}
GLboolean WebGLRenderingContextBase::isEnabled(GLenum cap) {
if (isContextLost() || !ValidateCapability("isEnabled", cap))
return 0;
if (cap == GL_STENCIL_TEST)
return stencil_enabled_;
return ContextGL()->IsEnabled(cap);
}
GLboolean WebGLRenderingContextBase::isFramebuffer(
WebGLFramebuffer* framebuffer) {
if (!framebuffer || isContextLost())
return 0;
if (!framebuffer->HasEverBeenBound())
return 0;
if (framebuffer->IsDeleted())
return 0;
return ContextGL()->IsFramebuffer(framebuffer->Object());
}
GLboolean WebGLRenderingContextBase::isProgram(WebGLProgram* program) {
if (!program || isContextLost())
return 0;
return ContextGL()->IsProgram(program->Object());
}
GLboolean WebGLRenderingContextBase::isRenderbuffer(
WebGLRenderbuffer* renderbuffer) {
if (!renderbuffer || isContextLost())
return 0;
if (!renderbuffer->HasEverBeenBound())
return 0;
if (renderbuffer->IsDeleted())
return 0;
return ContextGL()->IsRenderbuffer(renderbuffer->Object());
}
GLboolean WebGLRenderingContextBase::isShader(WebGLShader* shader) {
if (!shader || isContextLost())
return 0;
return ContextGL()->IsShader(shader->Object());
}
GLboolean WebGLRenderingContextBase::isTexture(WebGLTexture* texture) {
if (!texture || isContextLost())
return 0;
if (!texture->HasEverBeenBound())
return 0;
if (texture->IsDeleted())
return 0;
return ContextGL()->IsTexture(texture->Object());
}
void WebGLRenderingContextBase::lineWidth(GLfloat width) {
if (isContextLost())
return;
ContextGL()->LineWidth(width);
}
void WebGLRenderingContextBase::linkProgram(WebGLProgram* program) {
if (isContextLost() || !ValidateWebGLObject("linkProgram", program))
return;
if (program->ActiveTransformFeedbackCount() > 0) {
SynthesizeGLError(
GL_INVALID_OPERATION, "linkProgram",
"program being used by one or more active transform feedback objects");
return;
}
ContextGL()->LinkProgram(ObjectOrZero(program));
program->IncreaseLinkCount();
}
void WebGLRenderingContextBase::pixelStorei(GLenum pname, GLint param) {
if (isContextLost())
return;
switch (pname) {
case GC3D_UNPACK_FLIP_Y_WEBGL:
unpack_flip_y_ = param;
break;
case GC3D_UNPACK_PREMULTIPLY_ALPHA_WEBGL:
unpack_premultiply_alpha_ = param;
break;
case GC3D_UNPACK_COLORSPACE_CONVERSION_WEBGL:
if (static_cast<GLenum>(param) == GC3D_BROWSER_DEFAULT_WEBGL ||
param == GL_NONE) {
unpack_colorspace_conversion_ = static_cast<GLenum>(param);
} else {
SynthesizeGLError(
GL_INVALID_VALUE, "pixelStorei",
"invalid parameter for UNPACK_COLORSPACE_CONVERSION_WEBGL");
return;
}
break;
case GL_PACK_ALIGNMENT:
case GL_UNPACK_ALIGNMENT:
if (param == 1 || param == 2 || param == 4 || param == 8) {
if (pname == GL_PACK_ALIGNMENT) {
pack_alignment_ = param;
} else { // GL_UNPACK_ALIGNMENT:
unpack_alignment_ = param;
}
ContextGL()->PixelStorei(pname, param);
} else {
SynthesizeGLError(GL_INVALID_VALUE, "pixelStorei",
"invalid parameter for alignment");
return;
}
break;
default:
SynthesizeGLError(GL_INVALID_ENUM, "pixelStorei",
"invalid parameter name");
return;
}
}
void WebGLRenderingContextBase::polygonOffset(GLfloat factor, GLfloat units) {
if (isContextLost())
return;
ContextGL()->PolygonOffset(factor, units);
}
bool WebGLRenderingContextBase::ValidateReadBufferAndGetInfo(
const char* function_name,
WebGLFramebuffer*& read_framebuffer_binding) {
read_framebuffer_binding = GetReadFramebufferBinding();
if (read_framebuffer_binding) {
const char* reason = "framebuffer incomplete";
if (read_framebuffer_binding->CheckDepthStencilStatus(&reason) !=
GL_FRAMEBUFFER_COMPLETE) {
SynthesizeGLError(GL_INVALID_FRAMEBUFFER_OPERATION, function_name,
reason);
return false;
}
} else {
if (read_buffer_of_default_framebuffer_ == GL_NONE) {
ASSERT(IsWebGL2OrHigher());
SynthesizeGLError(GL_INVALID_OPERATION, function_name,
"no image to read from");
return false;
}
}
return true;
}
bool WebGLRenderingContextBase::ValidateReadPixelsFormatAndType(
GLenum format,
GLenum type,
DOMArrayBufferView* buffer) {
switch (format) {
case GL_ALPHA:
case GL_RGB:
case GL_RGBA:
break;
default:
SynthesizeGLError(GL_INVALID_ENUM, "readPixels", "invalid format");
return false;
}
switch (type) {
case GL_UNSIGNED_BYTE:
if (buffer && buffer->GetType() != DOMArrayBufferView::kTypeUint8) {
SynthesizeGLError(
GL_INVALID_OPERATION, "readPixels",
"type UNSIGNED_BYTE but ArrayBufferView not Uint8Array");
return false;
}
return true;
case GL_UNSIGNED_SHORT_5_6_5:
case GL_UNSIGNED_SHORT_4_4_4_4:
case GL_UNSIGNED_SHORT_5_5_5_1:
if (buffer && buffer->GetType() != DOMArrayBufferView::kTypeUint16) {
SynthesizeGLError(
GL_INVALID_OPERATION, "readPixels",
"type UNSIGNED_SHORT but ArrayBufferView not Uint16Array");
return false;
}
return true;
case GL_FLOAT:
if (ExtensionEnabled(kOESTextureFloatName) ||
ExtensionEnabled(kOESTextureHalfFloatName)) {
if (buffer && buffer->GetType() != DOMArrayBufferView::kTypeFloat32) {
SynthesizeGLError(GL_INVALID_OPERATION, "readPixels",
"type FLOAT but ArrayBufferView not Float32Array");
return false;
}
return true;
}
SynthesizeGLError(GL_INVALID_ENUM, "readPixels", "invalid type");
return false;
case GL_HALF_FLOAT_OES:
if (ExtensionEnabled(kOESTextureHalfFloatName)) {
if (buffer && buffer->GetType() != DOMArrayBufferView::kTypeUint16) {
SynthesizeGLError(
GL_INVALID_OPERATION, "readPixels",
"type HALF_FLOAT_OES but ArrayBufferView not Uint16Array");
return false;
}
return true;
}
SynthesizeGLError(GL_INVALID_ENUM, "readPixels", "invalid type");
return false;
default:
SynthesizeGLError(GL_INVALID_ENUM, "readPixels", "invalid type");
return false;
}
}
WebGLImageConversion::PixelStoreParams
WebGLRenderingContextBase::GetPackPixelStoreParams() {
WebGLImageConversion::PixelStoreParams params;
params.alignment = pack_alignment_;
return params;
}
WebGLImageConversion::PixelStoreParams
WebGLRenderingContextBase::GetUnpackPixelStoreParams(TexImageDimension) {
WebGLImageConversion::PixelStoreParams params;
params.alignment = unpack_alignment_;
return params;
}
bool WebGLRenderingContextBase::ValidateReadPixelsFuncParameters(
GLsizei width,
GLsizei height,
GLenum format,
GLenum type,
DOMArrayBufferView* buffer,
long long buffer_size) {
if (!ValidateReadPixelsFormatAndType(format, type, buffer))
return false;
// Calculate array size, taking into consideration of pack parameters.
unsigned total_bytes_required = 0, total_skip_bytes = 0;
GLenum error = WebGLImageConversion::ComputeImageSizeInBytes(
format, type, width, height, 1, GetPackPixelStoreParams(),
&total_bytes_required, 0, &total_skip_bytes);
if (error != GL_NO_ERROR) {
SynthesizeGLError(error, "readPixels", "invalid dimensions");
return false;
}
if (buffer_size <
static_cast<long long>(total_bytes_required + total_skip_bytes)) {
SynthesizeGLError(GL_INVALID_OPERATION, "readPixels",
"buffer is not large enough for dimensions");
return false;
}
return true;
}
void WebGLRenderingContextBase::readPixels(
GLint x,
GLint y,
GLsizei width,
GLsizei height,
GLenum format,
GLenum type,
NotShared<DOMArrayBufferView> pixels) {
ReadPixelsHelper(x, y, width, height, format, type, pixels.View(), 0);
}
void WebGLRenderingContextBase::ReadPixelsHelper(GLint x,
GLint y,
GLsizei width,
GLsizei height,
GLenum format,
GLenum type,
DOMArrayBufferView* pixels,
GLuint offset) {
if (isContextLost())
return;
// Due to WebGL's same-origin restrictions, it is not possible to
// taint the origin using the WebGL API.
DCHECK(canvas() ? canvas()->OriginClean() : offscreenCanvas()->OriginClean());
// Validate input parameters.
if (!pixels) {
SynthesizeGLError(GL_INVALID_VALUE, "readPixels",
"no destination ArrayBufferView");
return;
}
CheckedNumeric<GLuint> offset_in_bytes = offset;
offset_in_bytes *= pixels->TypeSize();
if (!offset_in_bytes.IsValid() ||
offset_in_bytes.ValueOrDie() > pixels->byteLength()) {
SynthesizeGLError(GL_INVALID_VALUE, "readPixels",
"destination offset out of range");
return;
}
const char* reason = "framebuffer incomplete";
WebGLFramebuffer* framebuffer = GetReadFramebufferBinding();
if (framebuffer && framebuffer->CheckDepthStencilStatus(&reason) !=
GL_FRAMEBUFFER_COMPLETE) {
SynthesizeGLError(GL_INVALID_FRAMEBUFFER_OPERATION, "readPixels", reason);
return;
}
CheckedNumeric<GLuint> buffer_size = pixels->byteLength() - offset_in_bytes;
if (!buffer_size.IsValid()) {
SynthesizeGLError(GL_INVALID_VALUE, "readPixels",
"destination offset out of range");
return;
}
if (!ValidateReadPixelsFuncParameters(width, height, format, type, pixels,
buffer_size.ValueOrDie())) {
return;
}
ClearIfComposited();
uint8_t* data = static_cast<uint8_t*>(pixels->BaseAddress()) +
offset_in_bytes.ValueOrDie();
{
ScopedDrawingBufferBinder binder(GetDrawingBuffer(), framebuffer);
ContextGL()->ReadPixels(x, y, width, height, format, type, data);
}
}
void WebGLRenderingContextBase::RenderbufferStorageImpl(
GLenum target,
GLsizei samples,
GLenum internalformat,
GLsizei width,
GLsizei height,
const char* function_name) {
ASSERT(!samples); // |samples| > 0 is only valid in WebGL2's
// renderbufferStorageMultisample().
ASSERT(!IsWebGL2OrHigher()); // Make sure this is overridden in WebGL 2.
switch (internalformat) {
case GL_DEPTH_COMPONENT16:
case GL_RGBA4:
case GL_RGB5_A1:
case GL_RGB565:
case GL_STENCIL_INDEX8:
ContextGL()->RenderbufferStorage(target, internalformat, width, height);
renderbuffer_binding_->SetInternalFormat(internalformat);
renderbuffer_binding_->SetSize(width, height);
break;
case GL_SRGB8_ALPHA8_EXT:
if (!ExtensionEnabled(kEXTsRGBName)) {
SynthesizeGLError(GL_INVALID_ENUM, function_name, "sRGB not enabled");
break;
}
ContextGL()->RenderbufferStorage(target, internalformat, width, height);
renderbuffer_binding_->SetInternalFormat(internalformat);
renderbuffer_binding_->SetSize(width, height);
break;
case GL_DEPTH_STENCIL_OES:
ASSERT(IsDepthStencilSupported());
ContextGL()->RenderbufferStorage(target, GL_DEPTH24_STENCIL8_OES, width,
height);
renderbuffer_binding_->SetSize(width, height);
renderbuffer_binding_->SetInternalFormat(internalformat);
break;
default:
SynthesizeGLError(GL_INVALID_ENUM, function_name,
"invalid internalformat");
break;
}
}
void WebGLRenderingContextBase::renderbufferStorage(GLenum target,
GLenum internalformat,
GLsizei width,
GLsizei height) {
const char* function_name = "renderbufferStorage";
if (isContextLost())
return;
if (target != GL_RENDERBUFFER) {
SynthesizeGLError(GL_INVALID_ENUM, function_name, "invalid target");
return;
}
if (!renderbuffer_binding_ || !renderbuffer_binding_->Object()) {
SynthesizeGLError(GL_INVALID_OPERATION, function_name,
"no bound renderbuffer");
return;
}
if (!ValidateSize(function_name, width, height))
return;
RenderbufferStorageImpl(target, 0, internalformat, width, height,
function_name);
ApplyStencilTest();
}
void WebGLRenderingContextBase::sampleCoverage(GLfloat value,
GLboolean invert) {
if (isContextLost())
return;
ContextGL()->SampleCoverage(value, invert);
}
void WebGLRenderingContextBase::scissor(GLint x,
GLint y,
GLsizei width,
GLsizei height) {
if (isContextLost())
return;
scissor_box_[0] = x;
scissor_box_[1] = y;
scissor_box_[2] = width;
scissor_box_[3] = height;
ContextGL()->Scissor(x, y, width, height);
}
void WebGLRenderingContextBase::shaderSource(WebGLShader* shader,
const String& string) {
if (isContextLost() || !ValidateWebGLObject("shaderSource", shader))
return;
String string_without_comments = StripComments(string).Result();
// TODO(danakj): Make validateShaderSource reject characters > 255 (or utf16
// Strings) so we don't need to use StringUTF8Adaptor.
if (!ValidateShaderSource(string_without_comments))
return;
shader->SetSource(string);
WTF::StringUTF8Adaptor adaptor(string_without_comments);
const GLchar* shader_data = adaptor.Data();
// TODO(danakj): Use base::saturated_cast<GLint>.
const GLint shader_length = adaptor.length();
ContextGL()->ShaderSource(ObjectOrZero(shader), 1, &shader_data,
&shader_length);
}
void WebGLRenderingContextBase::stencilFunc(GLenum func,
GLint ref,
GLuint mask) {
if (isContextLost())
return;
if (!ValidateStencilOrDepthFunc("stencilFunc", func))
return;
stencil_func_ref_ = ref;
stencil_func_ref_back_ = ref;
stencil_func_mask_ = mask;
stencil_func_mask_back_ = mask;
ContextGL()->StencilFunc(func, ref, mask);
}
void WebGLRenderingContextBase::stencilFuncSeparate(GLenum face,
GLenum func,
GLint ref,
GLuint mask) {
if (isContextLost())
return;
if (!ValidateStencilOrDepthFunc("stencilFuncSeparate", func))
return;
switch (face) {
case GL_FRONT_AND_BACK:
stencil_func_ref_ = ref;
stencil_func_ref_back_ = ref;
stencil_func_mask_ = mask;
stencil_func_mask_back_ = mask;
break;
case GL_FRONT:
stencil_func_ref_ = ref;
stencil_func_mask_ = mask;
break;
case GL_BACK:
stencil_func_ref_back_ = ref;
stencil_func_mask_back_ = mask;
break;
default:
SynthesizeGLError(GL_INVALID_ENUM, "stencilFuncSeparate", "invalid face");
return;
}
ContextGL()->StencilFuncSeparate(face, func, ref, mask);
}
void WebGLRenderingContextBase::stencilMask(GLuint mask) {
if (isContextLost())
return;
stencil_mask_ = mask;
stencil_mask_back_ = mask;
ContextGL()->StencilMask(mask);
}
void WebGLRenderingContextBase::stencilMaskSeparate(GLenum face, GLuint mask) {
if (isContextLost())
return;
switch (face) {
case GL_FRONT_AND_BACK:
stencil_mask_ = mask;
stencil_mask_back_ = mask;
break;
case GL_FRONT:
stencil_mask_ = mask;
break;
case GL_BACK:
stencil_mask_back_ = mask;
break;
default:
SynthesizeGLError(GL_INVALID_ENUM, "stencilMaskSeparate", "invalid face");
return;
}
ContextGL()->StencilMaskSeparate(face, mask);
}
void WebGLRenderingContextBase::stencilOp(GLenum fail,
GLenum zfail,
GLenum zpass) {
if (isContextLost())
return;
ContextGL()->StencilOp(fail, zfail, zpass);
}
void WebGLRenderingContextBase::stencilOpSeparate(GLenum face,
GLenum fail,
GLenum zfail,
GLenum zpass) {
if (isContextLost())
return;
ContextGL()->StencilOpSeparate(face, fail, zfail, zpass);
}
GLenum WebGLRenderingContextBase::ConvertTexInternalFormat(
GLenum internalformat,
GLenum type) {
// Convert to sized internal formats that are renderable with
// GL_CHROMIUM_color_buffer_float_rgb(a).
if (type == GL_FLOAT && internalformat == GL_RGBA &&
ExtensionsUtil()->IsExtensionEnabled(
"GL_CHROMIUM_color_buffer_float_rgba"))
return GL_RGBA32F_EXT;
if (type == GL_FLOAT && internalformat == GL_RGB &&
ExtensionsUtil()->IsExtensionEnabled(
"GL_CHROMIUM_color_buffer_float_rgb"))
return GL_RGB32F_EXT;
return internalformat;
}
void WebGLRenderingContextBase::TexImage2DBase(GLenum target,
GLint level,
GLint internalformat,
GLsizei width,
GLsizei height,
GLint border,
GLenum format,
GLenum type,
const void* pixels) {
// All calling functions check isContextLost, so a duplicate check is not
// needed here.
ContextGL()->TexImage2D(target, level,
ConvertTexInternalFormat(internalformat, type), width,
height, border, format, type, pixels);
}
void WebGLRenderingContextBase::TexImageImpl(
TexImageFunctionID function_id,
GLenum target,
GLint level,
GLint internalformat,
GLint xoffset,
GLint yoffset,
GLint zoffset,
GLenum format,
GLenum type,
Image* image,
WebGLImageConversion::ImageHtmlDomSource dom_source,
bool flip_y,
bool premultiply_alpha,
const IntRect& source_image_rect,
GLsizei depth,
GLint unpack_image_height) {
const char* func_name = GetTexImageFunctionName(function_id);
// All calling functions check isContextLost, so a duplicate check is not
// needed here.
if (type == GL_UNSIGNED_INT_10F_11F_11F_REV) {
// The UNSIGNED_INT_10F_11F_11F_REV type pack/unpack isn't implemented.
type = GL_FLOAT;
}
Vector<uint8_t> data;
IntRect sub_rect = source_image_rect;
if (sub_rect == SentinelEmptyRect()) {
// Recalculate based on the size of the Image.
sub_rect = SafeGetImageSize(image);
}
bool selecting_sub_rectangle = false;
if (!ValidateTexImageSubRectangle(func_name, function_id, image, sub_rect,
depth, unpack_image_height,
&selecting_sub_rectangle)) {
return;
}
// Adjust the source image rectangle if doing a y-flip.
IntRect adjusted_source_image_rect = sub_rect;
if (flip_y) {
adjusted_source_image_rect.SetY(image->height() -
adjusted_source_image_rect.MaxY());
}
WebGLImageConversion::ImageExtractor image_extractor(
image, dom_source, premultiply_alpha,
unpack_colorspace_conversion_ == GL_NONE);
if (!image_extractor.ImagePixelData()) {
SynthesizeGLError(GL_INVALID_VALUE, func_name, "bad image data");
return;
}
WebGLImageConversion::DataFormat source_data_format =
image_extractor.ImageSourceFormat();
WebGLImageConversion::AlphaOp alpha_op = image_extractor.ImageAlphaOp();
const void* image_pixel_data = image_extractor.ImagePixelData();
bool need_conversion = true;
if (type == GL_UNSIGNED_BYTE &&
source_data_format == WebGLImageConversion::kDataFormatRGBA8 &&
format == GL_RGBA && alpha_op == WebGLImageConversion::kAlphaDoNothing &&
!flip_y && !selecting_sub_rectangle && depth == 1) {
need_conversion = false;
} else {
if (!WebGLImageConversion::PackImageData(
image, image_pixel_data, format, type, flip_y, alpha_op,
source_data_format, image_extractor.ImageWidth(),
image_extractor.ImageHeight(), adjusted_source_image_rect, depth,
image_extractor.ImageSourceUnpackAlignment(), unpack_image_height,
data)) {
SynthesizeGLError(GL_INVALID_VALUE, func_name, "packImage error");
return;
}
}
ScopedUnpackParametersResetRestore temporary_reset_unpack(this);
if (function_id == kTexImage2D) {
TexImage2DBase(target, level, internalformat,
adjusted_source_image_rect.Width(),
adjusted_source_image_rect.Height(), 0, format, type,
need_conversion ? data.Data() : image_pixel_data);
} else if (function_id == kTexSubImage2D) {
ContextGL()->TexSubImage2D(
target, level, xoffset, yoffset, adjusted_source_image_rect.Width(),
adjusted_source_image_rect.Height(), format, type,
need_conversion ? data.Data() : image_pixel_data);
} else {
// 3D functions.
if (function_id == kTexImage3D) {
ContextGL()->TexImage3D(
target, level, internalformat, adjusted_source_image_rect.Width(),
adjusted_source_image_rect.Height(), depth, 0, format, type,
need_conversion ? data.Data() : image_pixel_data);
} else {
DCHECK_EQ(function_id, kTexSubImage3D);
ContextGL()->TexSubImage3D(
target, level, xoffset, yoffset, zoffset,
adjusted_source_image_rect.Width(),
adjusted_source_image_rect.Height(), depth, format, type,
need_conversion ? data.Data() : image_pixel_data);
}
}
}
bool WebGLRenderingContextBase::ValidateTexFunc(
const char* function_name,
TexImageFunctionType function_type,
TexFuncValidationSourceType source_type,
GLenum target,
GLint level,
GLenum internalformat,
GLsizei width,
GLsizei height,
GLsizei depth,
GLint border,
GLenum format,
GLenum type,
GLint xoffset,
GLint yoffset,
GLint zoffset) {
if (!ValidateTexFuncLevel(function_name, target, level))
return false;
if (!ValidateTexFuncParameters(function_name, function_type, source_type,
target, level, internalformat, width, height,
depth, border, format, type))
return false;
if (function_type == kTexSubImage) {
if (!ValidateSettableTexFormat(function_name, format))
return false;
if (!ValidateSize(function_name, xoffset, yoffset, zoffset))
return false;
} else {
// For SourceArrayBufferView, function validateTexFuncData() would handle
// whether to validate the SettableTexFormat
// by checking if the ArrayBufferView is null or not.
if (source_type != kSourceArrayBufferView) {
if (!ValidateSettableTexFormat(function_name, format))
return false;
}
}
return true;
}
bool WebGLRenderingContextBase::ValidateValueFitNonNegInt32(
const char* function_name,
const char* param_name,
long long value) {
if (value < 0) {
String error_msg = String(param_name) + " < 0";
SynthesizeGLError(GL_INVALID_VALUE, function_name,
error_msg.Ascii().Data());
return false;
}
if (value > static_cast<long long>(std::numeric_limits<int>::max())) {
String error_msg = String(param_name) + " more than 32-bit";
SynthesizeGLError(GL_INVALID_OPERATION, function_name,
error_msg.Ascii().Data());
return false;
}
return true;
}
// TODO(fmalita): figure why WebGLImageConversion::ImageExtractor can't handle
// SVG-backed images, and get rid of this intermediate step.
PassRefPtr<Image> WebGLRenderingContextBase::DrawImageIntoBuffer(
PassRefPtr<Image> pass_image,
int width,
int height,
const char* function_name) {
RefPtr<Image> image(std::move(pass_image));
ASSERT(image);
IntSize size(width, height);
ImageBuffer* buf = generated_image_cache_.GetImageBuffer(size);
if (!buf) {
SynthesizeGLError(GL_OUT_OF_MEMORY, function_name, "out of memory");
return nullptr;
}
if (!image->CurrentFrameKnownToBeOpaque())
buf->Canvas()->clear(SK_ColorTRANSPARENT);
IntRect src_rect(IntPoint(), image->size());
IntRect dest_rect(0, 0, size.Width(), size.Height());
PaintFlags flags;
// TODO(ccameron): WebGL should produce sRGB images.
// https://crbug.com/672299
image->Draw(buf->Canvas(), flags, dest_rect, src_rect,
kDoNotRespectImageOrientation,
Image::kDoNotClampImageToSourceRect);
return buf->NewImageSnapshot(kPreferNoAcceleration,
kSnapshotReasonWebGLDrawImageIntoBuffer);
}
WebGLTexture* WebGLRenderingContextBase::ValidateTexImageBinding(
const char* func_name,
TexImageFunctionID function_id,
GLenum target) {
return ValidateTexture2DBinding(func_name, target);
}
const char* WebGLRenderingContextBase::GetTexImageFunctionName(
TexImageFunctionID func_name) {
switch (func_name) {
case kTexImage2D:
return "texImage2D";
case kTexSubImage2D:
return "texSubImage2D";
case kTexSubImage3D:
return "texSubImage3D";
case kTexImage3D:
return "texImage3D";
default: // Adding default to prevent compile error
return "";
}
}
IntRect WebGLRenderingContextBase::SentinelEmptyRect() {
// Return a rectangle with -1 width and height so we can recognize
// it later and recalculate it based on the Image whose data we'll
// upload. It's important that there be no possible differences in
// the logic which computes the image's size.
return IntRect(0, 0, -1, -1);
}
IntRect WebGLRenderingContextBase::SafeGetImageSize(Image* image) {
if (!image)
return IntRect();
return GetTextureSourceSize(image);
}
IntRect WebGLRenderingContextBase::GetImageDataSize(ImageData* pixels) {
DCHECK(pixels);
return GetTextureSourceSize(pixels);
}
void WebGLRenderingContextBase::TexImageHelperDOMArrayBufferView(
TexImageFunctionID function_id,
GLenum target,
GLint level,
GLint internalformat,
GLsizei width,
GLsizei height,
GLsizei depth,
GLint border,
GLenum format,
GLenum type,
GLint xoffset,
GLint yoffset,
GLint zoffset,
DOMArrayBufferView* pixels,
NullDisposition null_disposition,
GLuint src_offset) {
const char* func_name = GetTexImageFunctionName(function_id);
if (isContextLost())
return;
if (!ValidateTexImageBinding(func_name, function_id, target))
return;
TexImageFunctionType function_type;
if (function_id == kTexImage2D || function_id == kTexImage3D)
function_type = kTexImage;
else
function_type = kTexSubImage;
if (!ValidateTexFunc(func_name, function_type, kSourceArrayBufferView, target,
level, internalformat, width, height, depth, border,
format, type, xoffset, yoffset, zoffset))
return;
TexImageDimension source_type;
if (function_id == kTexImage2D || function_id == kTexSubImage2D)
source_type = kTex2D;
else
source_type = kTex3D;
if (!ValidateTexFuncData(func_name, source_type, level, width, height, depth,
format, type, pixels, null_disposition, src_offset))
return;
uint8_t* data =
reinterpret_cast<uint8_t*>(pixels ? pixels->BaseAddress() : 0);
if (src_offset) {
DCHECK(pixels);
// No need to check overflow because validateTexFuncData() already did.
data += src_offset * pixels->TypeSize();
}
Vector<uint8_t> temp_data;
bool change_unpack_alignment = false;
if (data && (unpack_flip_y_ || unpack_premultiply_alpha_)) {
if (source_type == kTex2D) {
if (!WebGLImageConversion::ExtractTextureData(
width, height, format, type, unpack_alignment_, unpack_flip_y_,
unpack_premultiply_alpha_, data, temp_data))
return;
data = temp_data.Data();
}
change_unpack_alignment = true;
}
// TODO(crbug.com/666064): implement flipY and premultiplyAlpha for
// tex(Sub)3D.
if (function_id == kTexImage3D) {
ContextGL()->TexImage3D(target, level,
ConvertTexInternalFormat(internalformat, type),
width, height, depth, border, format, type, data);
return;
}
if (function_id == kTexSubImage3D) {
ContextGL()->TexSubImage3D(target, level, xoffset, yoffset, zoffset, width,
height, depth, format, type, data);
return;
}
ScopedUnpackParametersResetRestore temporary_reset_unpack(
this, change_unpack_alignment);
if (function_id == kTexImage2D)
TexImage2DBase(target, level, internalformat, width, height, border, format,
type, data);
else if (function_id == kTexSubImage2D)
ContextGL()->TexSubImage2D(target, level, xoffset, yoffset, width, height,
format, type, data);
}
void WebGLRenderingContextBase::texImage2D(
GLenum target,
GLint level,
GLint internalformat,
GLsizei width,
GLsizei height,
GLint border,
GLenum format,
GLenum type,
NotShared<DOMArrayBufferView> pixels) {
TexImageHelperDOMArrayBufferView(kTexImage2D, target, level, internalformat,
width, height, 1, border, format, type, 0, 0,
0, pixels.View(), kNullAllowed, 0);
}
void WebGLRenderingContextBase::TexImageHelperImageData(
TexImageFunctionID function_id,
GLenum target,
GLint level,
GLint internalformat,
GLint border,
GLenum format,
GLenum type,
GLsizei depth,
GLint xoffset,
GLint yoffset,
GLint zoffset,
ImageData* pixels,
const IntRect& source_image_rect,
GLint unpack_image_height) {
const char* func_name = GetTexImageFunctionName(function_id);
if (isContextLost())
return;
DCHECK(pixels);
if (pixels->data()->BufferBase()->IsNeutered()) {
SynthesizeGLError(GL_INVALID_VALUE, func_name,
"The source data has been neutered.");
return;
}
if (!ValidateTexImageBinding(func_name, function_id, target))
return;
TexImageFunctionType function_type;
if (function_id == kTexImage2D || function_id == kTexImage3D)
function_type = kTexImage;
else
function_type = kTexSubImage;
if (!ValidateTexFunc(func_name, function_type, kSourceImageData, target,
level, internalformat, pixels->width(), pixels->height(),
depth, border, format, type, xoffset, yoffset, zoffset))
return;
bool selecting_sub_rectangle = false;
if (!ValidateTexImageSubRectangle(
func_name, function_id, pixels, source_image_rect, depth,
unpack_image_height, &selecting_sub_rectangle)) {
return;
}
// Adjust the source image rectangle if doing a y-flip.
IntRect adjusted_source_image_rect = source_image_rect;
if (unpack_flip_y_) {
adjusted_source_image_rect.SetY(pixels->height() -
adjusted_source_image_rect.MaxY());
}
Vector<uint8_t> data;
bool need_conversion = true;
// The data from ImageData is always of format RGBA8.
// No conversion is needed if destination format is RGBA and type is
// UNSIGNED_BYTE and no Flip or Premultiply operation is required.
if (!unpack_flip_y_ && !unpack_premultiply_alpha_ && format == GL_RGBA &&
type == GL_UNSIGNED_BYTE && !selecting_sub_rectangle && depth == 1) {
need_conversion = false;
} else {
if (type == GL_UNSIGNED_INT_10F_11F_11F_REV) {
// The UNSIGNED_INT_10F_11F_11F_REV type pack/unpack isn't implemented.
type = GL_FLOAT;
}
if (!WebGLImageConversion::ExtractImageData(
pixels->data()->Data(),
WebGLImageConversion::DataFormat::kDataFormatRGBA8, pixels->size(),
adjusted_source_image_rect, depth, unpack_image_height, format,
type, unpack_flip_y_, unpack_premultiply_alpha_, data)) {
SynthesizeGLError(GL_INVALID_VALUE, func_name, "bad image data");
return;
}
}
ScopedUnpackParametersResetRestore temporary_reset_unpack(this);
const uint8_t* bytes = need_conversion ? data.Data() : pixels->data()->Data();
if (function_id == kTexImage2D) {
DCHECK_EQ(unpack_image_height, 0);
TexImage2DBase(
target, level, internalformat, adjusted_source_image_rect.Width(),
adjusted_source_image_rect.Height(), border, format, type, bytes);
} else if (function_id == kTexSubImage2D) {
DCHECK_EQ(unpack_image_height, 0);
ContextGL()->TexSubImage2D(
target, level, xoffset, yoffset, adjusted_source_image_rect.Width(),
adjusted_source_image_rect.Height(), format, type, bytes);
} else {
GLint upload_height = adjusted_source_image_rect.Height();
if (unpack_image_height) {
// GL_UNPACK_IMAGE_HEIGHT overrides the passed-in height.
upload_height = unpack_image_height;
}
if (function_id == kTexImage3D) {
ContextGL()->TexImage3D(target, level, internalformat,
adjusted_source_image_rect.Width(), upload_height,
depth, border, format, type, bytes);
} else {
DCHECK_EQ(function_id, kTexSubImage3D);
ContextGL()->TexSubImage3D(target, level, xoffset, yoffset, zoffset,
adjusted_source_image_rect.Width(),
upload_height, depth, format, type, bytes);
}
}
}
void WebGLRenderingContextBase::texImage2D(GLenum target,
GLint level,
GLint internalformat,
GLenum format,
GLenum type,
ImageData* pixels) {
TexImageHelperImageData(kTexImage2D, target, level, internalformat, 0, format,
type, 1, 0, 0, 0, pixels, GetImageDataSize(pixels),
0);
}
void WebGLRenderingContextBase::TexImageHelperHTMLImageElement(
TexImageFunctionID function_id,
GLenum target,
GLint level,
GLint internalformat,
GLenum format,
GLenum type,
GLint xoffset,
GLint yoffset,
GLint zoffset,
HTMLImageElement* image,
const IntRect& source_image_rect,
GLsizei depth,
GLint unpack_image_height,
ExceptionState& exception_state) {
const char* func_name = GetTexImageFunctionName(function_id);
if (isContextLost())
return;
if (!ValidateHTMLImageElement(func_name, image, exception_state))
return;
if (!ValidateTexImageBinding(func_name, function_id, target))
return;
RefPtr<Image> image_for_render = image->CachedImage()->GetImage();
if (image_for_render && image_for_render->IsSVGImage()) {
if (canvas()) {
UseCounter::Count(canvas()->GetDocument(), UseCounter::kSVGInWebGL);
}
image_for_render = DrawImageIntoBuffer(
image_for_render.Release(), image->width(), image->height(), func_name);
}
TexImageFunctionType function_type;
if (function_id == kTexImage2D || function_id == kTexImage3D)
function_type = kTexImage;
else
function_type = kTexSubImage;
if (!image_for_render ||
!ValidateTexFunc(func_name, function_type, kSourceHTMLImageElement,
target, level, internalformat, image_for_render->width(),
image_for_render->height(), depth, 0, format, type,
xoffset, yoffset, zoffset))
return;
TexImageImpl(function_id, target, level, internalformat, xoffset, yoffset,
zoffset, format, type, image_for_render.Get(),
WebGLImageConversion::kHtmlDomImage, unpack_flip_y_,
unpack_premultiply_alpha_, source_image_rect, depth,
unpack_image_height);
}
void WebGLRenderingContextBase::texImage2D(GLenum target,
GLint level,
GLint internalformat,
GLenum format,
GLenum type,
HTMLImageElement* image,
ExceptionState& exception_state) {
TexImageHelperHTMLImageElement(kTexImage2D, target, level, internalformat,
format, type, 0, 0, 0, image,
SentinelEmptyRect(), 1, 0, exception_state);
}
bool WebGLRenderingContextBase::CanUseTexImageByGPU(GLenum type) {
#if OS(MACOSX)
// RGB5_A1 is not color-renderable on NVIDIA Mac, see crbug.com/676209.
// Though, glCopyTextureCHROMIUM can handle RGB5_A1 internalformat by doing a
// fallback path, but it doesn't know the type info. So, we still cannot do
// the fallback path in glCopyTextureCHROMIUM for
// RGBA/RGBA/UNSIGNED_SHORT_5_5_5_1 format and type combination.
if (type == GL_UNSIGNED_SHORT_5_5_5_1)
return false;
#endif
// OES_texture_half_float doesn't support HALF_FLOAT_OES type for
// CopyTexImage/CopyTexSubImage. And OES_texture_half_float doesn't require
// HALF_FLOAT_OES type texture to be renderable. So, HALF_FLOAT_OES type
// texture cannot be copied to or drawn to by glCopyTextureCHROMIUM.
if (type == GL_HALF_FLOAT_OES)
return false;
return true;
}
SnapshotReason WebGLRenderingContextBase::FunctionIDToSnapshotReason(
TexImageFunctionID id) {
switch (id) {
case kTexImage2D:
return kSnapshotReasonWebGLTexImage2D;
case kTexSubImage2D:
return kSnapshotReasonWebGLTexSubImage2D;
case kTexImage3D:
return kSnapshotReasonWebGLTexImage3D;
case kTexSubImage3D:
return kSnapshotReasonWebGLTexSubImage3D;
}
NOTREACHED();
return kSnapshotReasonUnknown;
}
void WebGLRenderingContextBase::TexImageCanvasByGPU(
TexImageFunctionID function_id,
HTMLCanvasElement* canvas,
GLenum target,
GLuint target_texture,
GLint xoffset,
GLint yoffset,
const IntRect& source_sub_rectangle) {
if (!canvas->Is3D()) {
ImageBuffer* buffer = canvas->Buffer();
if (buffer &&
!buffer->CopyToPlatformTexture(
FunctionIDToSnapshotReason(function_id), ContextGL(), target,
target_texture, unpack_premultiply_alpha_, unpack_flip_y_,
IntPoint(xoffset, yoffset), source_sub_rectangle)) {
NOTREACHED();
}
} else {
WebGLRenderingContextBase* gl =
ToWebGLRenderingContextBase(canvas->RenderingContext());
ScopedTexture2DRestorer restorer(gl);
if (!gl->GetDrawingBuffer()->CopyToPlatformTexture(
ContextGL(), target, target_texture, unpack_premultiply_alpha_,
!unpack_flip_y_, IntPoint(xoffset, yoffset), source_sub_rectangle,
kBackBuffer)) {
NOTREACHED();
}
}
}
void WebGLRenderingContextBase::TexImageByGPU(
TexImageFunctionID function_id,
WebGLTexture* texture,
GLenum target,
GLint level,
GLint xoffset,
GLint yoffset,
GLint zoffset,
CanvasImageSource* image,
const IntRect& source_sub_rectangle) {
DCHECK(image->IsCanvasElement() || image->IsImageBitmap());
int width = source_sub_rectangle.Width();
int height = source_sub_rectangle.Height();
ScopedTexture2DRestorer restorer(this);
GLuint target_texture = texture->Object();
bool possible_direct_copy = false;
if (function_id == kTexImage2D || function_id == kTexSubImage2D) {
possible_direct_copy = Extensions3DUtil::CanUseCopyTextureCHROMIUM(target);
}
GLint copy_x_offset = xoffset;
GLint copy_y_offset = yoffset;
GLenum copy_target = target;
// if direct copy is not possible, create a temporary texture and then copy
// from canvas to temporary texture to target texture.
if (!possible_direct_copy) {
ContextGL()->GenTextures(1, &target_texture);
ContextGL()->BindTexture(GL_TEXTURE_2D, target_texture);
ContextGL()->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
GL_NEAREST);
ContextGL()->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
GL_NEAREST);
ContextGL()->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S,
GL_CLAMP_TO_EDGE);
ContextGL()->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T,
GL_CLAMP_TO_EDGE);
ContextGL()->TexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0,
GL_RGBA, GL_UNSIGNED_BYTE, 0);
copy_x_offset = 0;
copy_y_offset = 0;
copy_target = GL_TEXTURE_2D;
}
{
// glCopyTextureCHROMIUM has a DRAW_AND_READBACK path which will call
// texImage2D. So, reset unpack buffer parameters before that.
ScopedUnpackParametersResetRestore temporaryResetUnpack(this);
if (image->IsCanvasElement()) {
TexImageCanvasByGPU(function_id, static_cast<HTMLCanvasElement*>(image),
copy_target, target_texture, copy_x_offset,
copy_y_offset, source_sub_rectangle);
} else {
TexImageBitmapByGPU(static_cast<ImageBitmap*>(image), copy_target,
target_texture, !unpack_flip_y_, copy_x_offset,
copy_y_offset, source_sub_rectangle);
}
}
if (!possible_direct_copy) {
GLuint tmp_fbo;
ContextGL()->GenFramebuffers(1, &tmp_fbo);
ContextGL()->BindFramebuffer(GL_FRAMEBUFFER, tmp_fbo);
ContextGL()->FramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
GL_TEXTURE_2D, target_texture, 0);
ContextGL()->BindTexture(texture->GetTarget(), texture->Object());
if (function_id == kTexImage2D) {
ContextGL()->CopyTexSubImage2D(target, level, 0, 0, 0, 0, width, height);
} else if (function_id == kTexSubImage2D) {
ContextGL()->CopyTexSubImage2D(target, level, xoffset, yoffset, 0, 0,
width, height);
} else if (function_id == kTexSubImage3D) {
ContextGL()->CopyTexSubImage3D(target, level, xoffset, yoffset, zoffset,
0, 0, width, height);
}
ContextGL()->FramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
GL_TEXTURE_2D, 0, 0);
RestoreCurrentFramebuffer();
ContextGL()->DeleteFramebuffers(1, &tmp_fbo);
ContextGL()->DeleteTextures(1, &target_texture);
}
}
void WebGLRenderingContextBase::TexImageHelperHTMLCanvasElement(
TexImageFunctionID function_id,
GLenum target,
GLint level,
GLint internalformat,
GLenum format,
GLenum type,
GLint xoffset,
GLint yoffset,
GLint zoffset,
HTMLCanvasElement* canvas,
const IntRect& source_sub_rectangle,
GLsizei depth,
GLint unpack_image_height,
ExceptionState& exception_state) {
const char* func_name = GetTexImageFunctionName(function_id);
if (isContextLost())
return;
if (!ValidateHTMLCanvasElement(func_name, canvas, exception_state))
return;
WebGLTexture* texture =
ValidateTexImageBinding(func_name, function_id, target);
if (!texture)
return;
TexImageFunctionType function_type;
if (function_id == kTexImage2D)
function_type = kTexImage;
else
function_type = kTexSubImage;
if (!ValidateTexFunc(func_name, function_type, kSourceHTMLCanvasElement,
target, level, internalformat, canvas->width(),
canvas->height(), depth, 0, format, type, xoffset,
yoffset, zoffset))
return;
// Note that the sub-rectangle validation is needed for the GPU-GPU
// copy case, but is redundant for the software upload case
// (texImageImpl).
bool selecting_sub_rectangle = false;
if (!ValidateTexImageSubRectangle(
func_name, function_id, canvas, source_sub_rectangle, depth,
unpack_image_height, &selecting_sub_rectangle)) {
return;
}
if (function_id == kTexImage2D || function_id == kTexSubImage2D) {
// texImageByGPU relies on copyTextureCHROMIUM which doesn't support
// float/integer/sRGB internal format.
// TODO(crbug.com/622958): relax the constrains if copyTextureCHROMIUM is
// upgraded to handle more formats.
if (!canvas->IsAccelerated() || !CanUseTexImageByGPU(type)) {
// 2D canvas has only FrontBuffer.
TexImageImpl(function_id, target, level, internalformat, xoffset, yoffset,
zoffset, format, type,
canvas
->CopiedImage(kFrontBuffer, kPreferAcceleration,
FunctionIDToSnapshotReason(function_id))
.Get(),
WebGLImageConversion::kHtmlDomCanvas, unpack_flip_y_,
unpack_premultiply_alpha_, source_sub_rectangle, 1, 0);
return;
}
// The GPU-GPU copy path uses the Y-up coordinate system.
IntRect adjusted_source_sub_rectangle = source_sub_rectangle;
if (!unpack_flip_y_) {
adjusted_source_sub_rectangle.SetY(canvas->height() -
adjusted_source_sub_rectangle.MaxY());
}
if (function_id == kTexImage2D) {
TexImage2DBase(target, level, internalformat,
source_sub_rectangle.Width(),
source_sub_rectangle.Height(), 0, format, type, 0);
TexImageByGPU(function_id, texture, target, level, 0, 0, 0, canvas,
adjusted_source_sub_rectangle);
} else {
TexImageByGPU(function_id, texture, target, level, xoffset, yoffset, 0,
canvas, adjusted_source_sub_rectangle);
}
} else {
// 3D functions.
// TODO(zmo): Implement GPU-to-GPU copy path (crbug.com/612542).
// Note that code will also be needed to copy to layers of 3D
// textures, and elements of 2D texture arrays.
TexImageImpl(function_id, target, level, internalformat, xoffset, yoffset,
zoffset, format, type,
canvas
->CopiedImage(kFrontBuffer, kPreferAcceleration,
FunctionIDToSnapshotReason(function_id))
.Get(),
WebGLImageConversion::kHtmlDomCanvas, unpack_flip_y_,
unpack_premultiply_alpha_, source_sub_rectangle, depth,
unpack_image_height);
}
}
void WebGLRenderingContextBase::texImage2D(GLenum target,
GLint level,
GLint internalformat,
GLenum format,
GLenum type,
HTMLCanvasElement* canvas,
ExceptionState& exception_state) {
TexImageHelperHTMLCanvasElement(
kTexImage2D, target, level, internalformat, format, type, 0, 0, 0, canvas,
GetTextureSourceSize(canvas), 1, 0, exception_state);
}
PassRefPtr<Image> WebGLRenderingContextBase::VideoFrameToImage(
HTMLVideoElement* video) {
IntSize size(video->videoWidth(), video->videoHeight());
ImageBuffer* buf = generated_image_cache_.GetImageBuffer(size);
if (!buf) {
SynthesizeGLError(GL_OUT_OF_MEMORY, "texImage2D", "out of memory");
return nullptr;
}
IntRect dest_rect(0, 0, size.Width(), size.Height());
video->PaintCurrentFrame(buf->Canvas(), dest_rect, nullptr);
return buf->NewImageSnapshot();
}
void WebGLRenderingContextBase::TexImageHelperHTMLVideoElement(
TexImageFunctionID function_id,
GLenum target,
GLint level,
GLint internalformat,
GLenum format,
GLenum type,
GLint xoffset,
GLint yoffset,
GLint zoffset,
HTMLVideoElement* video,
const IntRect& source_image_rect,
GLsizei depth,
GLint unpack_image_height,
ExceptionState& exception_state) {
const char* func_name = GetTexImageFunctionName(function_id);
if (isContextLost())
return;
if (!ValidateHTMLVideoElement(func_name, video, exception_state))
return;
WebGLTexture* texture =
ValidateTexImageBinding(func_name, function_id, target);
if (!texture)
return;
TexImageFunctionType function_type;
if (function_id == kTexImage2D || function_id == kTexImage3D)
function_type = kTexImage;
else
function_type = kTexSubImage;
if (!ValidateTexFunc(func_name, function_type, kSourceHTMLVideoElement,
target, level, internalformat, video->videoWidth(),
video->videoHeight(), 1, 0, format, type, xoffset,
yoffset, zoffset))
return;
bool source_image_rect_is_default =
source_image_rect == SentinelEmptyRect() ||
source_image_rect ==
IntRect(0, 0, video->videoWidth(), video->videoHeight());
const bool use_copyTextureCHROMIUM =
function_id == kTexImage2D && source_image_rect_is_default &&
depth == 1 && GL_TEXTURE_2D == target && CanUseTexImageByGPU(type);
// Format of source video may be 16-bit format, e.g. Y16 format.
// glCopyTextureCHROMIUM requires the source texture to be in 8-bit format.
// Converting 16-bits formated source texture to 8-bits formated texture will
// cause precision lost. So, uploading such video texture to half float or
// float texture can not use GPU-GPU path.
if (use_copyTextureCHROMIUM) {
DCHECK_EQ(xoffset, 0);
DCHECK_EQ(yoffset, 0);
DCHECK_EQ(zoffset, 0);
// Go through the fast path doing a GPU-GPU textures copy without a readback
// to system memory if possible. Otherwise, it will fall back to the normal
// SW path.
// Note that neither
// HTMLVideoElement::copyVideoTextureToPlatformTexture nor
// ImageBuffer::copyToPlatformTexture allocate the destination texture
// any more.
TexImage2DBase(target, level, internalformat, video->videoWidth(),
video->videoHeight(), 0, format, type, nullptr);
if (video->CopyVideoTextureToPlatformTexture(ContextGL(), texture->Object(),
unpack_premultiply_alpha_,
unpack_flip_y_)) {
texture->UpdateLastUploadedVideo(video->GetWebMediaPlayer());
return;
}
}
if (source_image_rect_is_default) {
// Try using optimized CPU-GPU path for some formats: e.g. Y16 and Y8. It
// leaves early for other formats or if frame is stored on GPU.
ScopedUnpackParametersResetRestore(
this, unpack_flip_y_ || unpack_premultiply_alpha_);
if (video->TexImageImpl(
static_cast<WebMediaPlayer::TexImageFunctionID>(function_id),
target, ContextGL(), level,
ConvertTexInternalFormat(internalformat, type), format, type,
xoffset, yoffset, zoffset, unpack_flip_y_,
unpack_premultiply_alpha_ &&
unpack_colorspace_conversion_ == GL_NONE)) {
texture->UpdateLastUploadedVideo(video->GetWebMediaPlayer());
return;
}
}
if (use_copyTextureCHROMIUM) {
// Try using an accelerated image buffer, this allows YUV conversion to be
// done on the GPU.
std::unique_ptr<ImageBufferSurface> surface =
WTF::WrapUnique(new AcceleratedImageBufferSurface(
IntSize(video->videoWidth(), video->videoHeight())));
if (surface->IsValid()) {
std::unique_ptr<ImageBuffer> image_buffer(
ImageBuffer::Create(std::move(surface)));
if (image_buffer) {
// The video element paints an RGBA frame into our surface here. By
// using an AcceleratedImageBufferSurface, we enable the WebMediaPlayer
// implementation to do any necessary color space conversion on the GPU
// (though it may still do a CPU conversion and upload the results).
video->PaintCurrentFrame(
image_buffer->Canvas(),
IntRect(0, 0, video->videoWidth(), video->videoHeight()), nullptr);
// This is a straight GPU-GPU copy, any necessary color space conversion
// was handled in the paintCurrentFrameInContext() call.
if (image_buffer->CopyToPlatformTexture(
FunctionIDToSnapshotReason(function_id), ContextGL(), target,
texture->Object(), unpack_premultiply_alpha_, unpack_flip_y_,
IntPoint(0, 0),
IntRect(0, 0, video->videoWidth(), video->videoHeight()))) {
texture->UpdateLastUploadedVideo(video->GetWebMediaPlayer());
return;
}
}
}
}
RefPtr<Image> image = VideoFrameToImage(video);
if (!image)
return;
TexImageImpl(function_id, target, level, internalformat, xoffset, yoffset,
zoffset, format, type, image.Get(),
WebGLImageConversion::kHtmlDomVideo, unpack_flip_y_,
unpack_premultiply_alpha_, source_image_rect, depth,
unpack_image_height);
texture->UpdateLastUploadedVideo(video->GetWebMediaPlayer());
}
void WebGLRenderingContextBase::TexImageBitmapByGPU(
ImageBitmap* bitmap,
GLenum target,
GLuint target_texture,
bool flip_y,
GLint xoffset,
GLint yoffset,
const IntRect& source_sub_rect) {
bitmap->BitmapImage()->CopyToTexture(
GetDrawingBuffer()->ContextProvider(), target, target_texture, flip_y,
IntPoint(xoffset, yoffset), source_sub_rect);
}
void WebGLRenderingContextBase::texImage2D(GLenum target,
GLint level,
GLint internalformat,
GLenum format,
GLenum type,
HTMLVideoElement* video,
ExceptionState& exception_state) {
TexImageHelperHTMLVideoElement(kTexImage2D, target, level, internalformat,
format, type, 0, 0, 0, video,
SentinelEmptyRect(), 1, 0, exception_state);
}
void WebGLRenderingContextBase::TexImageHelperImageBitmap(
TexImageFunctionID function_id,
GLenum target,
GLint level,
GLint internalformat,
GLenum format,
GLenum type,
GLint xoffset,
GLint yoffset,
GLint zoffset,
ImageBitmap* bitmap,
const IntRect& source_sub_rect,
GLsizei depth,
GLint unpack_image_height,
ExceptionState& exception_state) {
const char* func_name = GetTexImageFunctionName(function_id);
if (isContextLost())
return;
if (!ValidateImageBitmap(func_name, bitmap, exception_state))
return;
WebGLTexture* texture =
ValidateTexImageBinding(func_name, function_id, target);
if (!texture)
return;
bool selecting_sub_rectangle = false;
if (!ValidateTexImageSubRectangle(func_name, function_id, bitmap,
source_sub_rect, depth, unpack_image_height,
&selecting_sub_rectangle)) {
return;
}
TexImageFunctionType function_type;
if (function_id == kTexImage2D)
function_type = kTexImage;
else
function_type = kTexSubImage;
GLsizei width = source_sub_rect.Width();
GLsizei height = source_sub_rect.Height();
if (!ValidateTexFunc(func_name, function_type, kSourceImageBitmap, target,
level, internalformat, width, height, depth, 0, format,
type, xoffset, yoffset, zoffset))
return;
ASSERT(bitmap->BitmapImage());
// TODO(kbr): make this work for sub-rectangles of ImageBitmaps.
if (function_id != kTexSubImage3D && function_id != kTexImage3D &&
bitmap->IsAccelerated() && CanUseTexImageByGPU(type) &&
!selecting_sub_rectangle) {
if (function_id == kTexImage2D) {
TexImage2DBase(target, level, internalformat, width, height, 0, format,
type, 0);
TexImageByGPU(function_id, texture, target, level, 0, 0, 0, bitmap,
source_sub_rect);
} else if (function_id == kTexSubImage2D) {
TexImageByGPU(function_id, texture, target, level, xoffset, yoffset, 0,
bitmap, source_sub_rect);
}
return;
}
sk_sp<SkImage> sk_image = bitmap->BitmapImage()->ImageForCurrentFrame();
SkPixmap pixmap;
uint8_t* pixel_data_ptr = nullptr;
RefPtr<Uint8Array> pixel_data;
// In the case where an ImageBitmap is not texture backed, peekPixels() always
// succeed. However, when it is texture backed and !canUseTexImageByGPU, we
// do a GPU read back.
bool peek_succeed = sk_image->peekPixels(&pixmap);
if (peek_succeed) {
pixel_data_ptr = static_cast<uint8_t*>(pixmap.writable_addr());
} else {
pixel_data = bitmap->CopyBitmapData(
bitmap->IsPremultiplied() ? kPremultiplyAlpha : kDontPremultiplyAlpha);
pixel_data_ptr = pixel_data->Data();
}
Vector<uint8_t> data;
bool need_conversion = true;
bool have_peekable_rgba =
(peek_succeed &&
pixmap.colorType() == SkColorType::kRGBA_8888_SkColorType);
bool is_pixel_data_rgba = (have_peekable_rgba || !peek_succeed);
if (is_pixel_data_rgba && format == GL_RGBA && type == GL_UNSIGNED_BYTE &&
!selecting_sub_rectangle && depth == 1) {
need_conversion = false;
} else {
if (type == GL_UNSIGNED_INT_10F_11F_11F_REV) {
// The UNSIGNED_INT_10F_11F_11F_REV type pack/unpack isn't implemented.
type = GL_FLOAT;
}
// In the case of ImageBitmap, we do not need to apply flipY or
// premultiplyAlpha.
bool is_pixel_data_bgra =
pixmap.colorType() == SkColorType::kBGRA_8888_SkColorType;
if ((is_pixel_data_bgra &&
!WebGLImageConversion::ExtractImageData(
pixel_data_ptr, WebGLImageConversion::DataFormat::kDataFormatBGRA8,
bitmap->size(), source_sub_rect, depth, unpack_image_height,
format, type, false, false, data)) ||
(is_pixel_data_rgba &&
!WebGLImageConversion::ExtractImageData(
pixel_data_ptr, WebGLImageConversion::DataFormat::kDataFormatRGBA8,
bitmap->size(), source_sub_rect, depth, unpack_image_height,
format, type, false, false, data))) {
SynthesizeGLError(GL_INVALID_VALUE, func_name, "bad image data");
return;
}
}
ScopedUnpackParametersResetRestore temporary_reset_unpack(this);
if (function_id == kTexImage2D) {
TexImage2DBase(target, level, internalformat, width, height, 0, format,
type, need_conversion ? data.Data() : pixel_data_ptr);
} else if (function_id == kTexSubImage2D) {
ContextGL()->TexSubImage2D(target, level, xoffset, yoffset, width, height,
format, type,
need_conversion ? data.Data() : pixel_data_ptr);
} else if (function_id == kTexImage3D) {
ContextGL()->TexImage3D(target, level, internalformat, width, height, depth,
0, format, type,
need_conversion ? data.Data() : pixel_data_ptr);
} else {
DCHECK_EQ(function_id, kTexSubImage3D);
ContextGL()->TexSubImage3D(target, level, xoffset, yoffset, zoffset, width,
height, depth, format, type,
need_conversion ? data.Data() : pixel_data_ptr);
}
}
void WebGLRenderingContextBase::texImage2D(GLenum target,
GLint level,
GLint internalformat,
GLenum format,
GLenum type,
ImageBitmap* bitmap,
ExceptionState& exception_state) {
TexImageHelperImageBitmap(kTexImage2D, target, level, internalformat, format,
type, 0, 0, 0, bitmap, GetTextureSourceSize(bitmap),
1, 0, exception_state);
}
void WebGLRenderingContextBase::TexParameter(GLenum target,
GLenum pname,
GLfloat paramf,
GLint parami,
bool is_float) {
if (isContextLost())
return;
if (!ValidateTextureBinding("texParameter", target))
return;
switch (pname) {
case GL_TEXTURE_MIN_FILTER:
case GL_TEXTURE_MAG_FILTER:
break;
case GL_TEXTURE_WRAP_R:
// fall through to WRAP_S and WRAP_T for WebGL 2 or higher
if (!IsWebGL2OrHigher()) {
SynthesizeGLError(GL_INVALID_ENUM, "texParameter",
"invalid parameter name");
return;
}
case GL_TEXTURE_WRAP_S:
case GL_TEXTURE_WRAP_T:
if ((is_float && paramf != GL_CLAMP_TO_EDGE &&
paramf != GL_MIRRORED_REPEAT && paramf != GL_REPEAT) ||
(!is_float && parami != GL_CLAMP_TO_EDGE &&
parami != GL_MIRRORED_REPEAT && parami != GL_REPEAT)) {
SynthesizeGLError(GL_INVALID_ENUM, "texParameter", "invalid parameter");
return;
}
break;
case GL_TEXTURE_MAX_ANISOTROPY_EXT: // EXT_texture_filter_anisotropic
if (!ExtensionEnabled(kEXTTextureFilterAnisotropicName)) {
SynthesizeGLError(
GL_INVALID_ENUM, "texParameter",
"invalid parameter, EXT_texture_filter_anisotropic not enabled");
return;
}
break;
case GL_TEXTURE_COMPARE_FUNC:
case GL_TEXTURE_COMPARE_MODE:
case GL_TEXTURE_BASE_LEVEL:
case GL_TEXTURE_MAX_LEVEL:
case GL_TEXTURE_MAX_LOD:
case GL_TEXTURE_MIN_LOD:
if (!IsWebGL2OrHigher()) {
SynthesizeGLError(GL_INVALID_ENUM, "texParameter",
"invalid parameter name");
return;
}
break;
default:
SynthesizeGLError(GL_INVALID_ENUM, "texParameter",
"invalid parameter name");
return;
}
if (is_float) {
ContextGL()->TexParameterf(target, pname, paramf);
} else {
ContextGL()->TexParameteri(target, pname, parami);
}
}
void WebGLRenderingContextBase::texParameterf(GLenum target,
GLenum pname,
GLfloat param) {
TexParameter(target, pname, param, 0, true);
}
void WebGLRenderingContextBase::texParameteri(GLenum target,
GLenum pname,
GLint param) {
TexParameter(target, pname, 0, param, false);
}
void WebGLRenderingContextBase::texSubImage2D(
GLenum target,
GLint level,
GLint xoffset,
GLint yoffset,
GLsizei width,
GLsizei height,
GLenum format,
GLenum type,
NotShared<DOMArrayBufferView> pixels) {
TexImageHelperDOMArrayBufferView(kTexSubImage2D, target, level, 0, width,
height, 1, 0, format, type, xoffset, yoffset,
0, pixels.View(), kNullNotAllowed, 0);
}
void WebGLRenderingContextBase::texSubImage2D(GLenum target,
GLint level,
GLint xoffset,
GLint yoffset,
GLenum format,
GLenum type,
ImageData* pixels) {
TexImageHelperImageData(kTexSubImage2D, target, level, 0, 0, format, type, 1,
xoffset, yoffset, 0, pixels, GetImageDataSize(pixels),
0);
}
void WebGLRenderingContextBase::texSubImage2D(GLenum target,
GLint level,
GLint xoffset,
GLint yoffset,
GLenum format,
GLenum type,
HTMLImageElement* image,
ExceptionState& exception_state) {
TexImageHelperHTMLImageElement(kTexSubImage2D, target, level, 0, format, type,
xoffset, yoffset, 0, image,
SentinelEmptyRect(), 1, 0, exception_state);
}
void WebGLRenderingContextBase::texSubImage2D(GLenum target,
GLint level,
GLint xoffset,
GLint yoffset,
GLenum format,
GLenum type,
HTMLCanvasElement* canvas,
ExceptionState& exception_state) {
TexImageHelperHTMLCanvasElement(
kTexSubImage2D, target, level, 0, format, type, xoffset, yoffset, 0,
canvas, GetTextureSourceSize(canvas), 1, 0, exception_state);
}
void WebGLRenderingContextBase::texSubImage2D(GLenum target,
GLint level,
GLint xoffset,
GLint yoffset,
GLenum format,
GLenum type,
HTMLVideoElement* video,
ExceptionState& exception_state) {
TexImageHelperHTMLVideoElement(kTexSubImage2D, target, level, 0, format, type,
xoffset, yoffset, 0, video,
SentinelEmptyRect(), 1, 0, exception_state);
}
void WebGLRenderingContextBase::texSubImage2D(GLenum target,
GLint level,
GLint xoffset,
GLint yoffset,
GLenum format,
GLenum type,
ImageBitmap* bitmap,
ExceptionState& exception_state) {
TexImageHelperImageBitmap(
kTexSubImage2D, target, level, 0, format, type, xoffset, yoffset, 0,
bitmap, GetTextureSourceSize(bitmap), 1, 0, exception_state);
}
void WebGLRenderingContextBase::uniform1f(const WebGLUniformLocation* location,
GLfloat x) {
if (isContextLost() || !location)
return;
if (location->Program() != current_program_) {
SynthesizeGLError(GL_INVALID_OPERATION, "uniform1f",
"location not for current program");
return;
}
ContextGL()->Uniform1f(location->Location(), x);
}
void WebGLRenderingContextBase::uniform1fv(const WebGLUniformLocation* location,
const FlexibleFloat32ArrayView& v) {
if (isContextLost() || !ValidateUniformParameters<WTF::Float32Array>(
"uniform1fv", location, v, 1, 0, v.length()))
return;
ContextGL()->Uniform1fv(location->Location(), v.length(),
v.DataMaybeOnStack());
}
void WebGLRenderingContextBase::uniform1fv(const WebGLUniformLocation* location,
Vector<GLfloat>& v) {
if (isContextLost() ||
!ValidateUniformParameters("uniform1fv", location, v.Data(), v.size(), 1,
0, v.size()))
return;
ContextGL()->Uniform1fv(location->Location(), v.size(), v.Data());
}
void WebGLRenderingContextBase::uniform1i(const WebGLUniformLocation* location,
GLint x) {
if (isContextLost() || !location)
return;
if (location->Program() != current_program_) {
SynthesizeGLError(GL_INVALID_OPERATION, "uniform1i",
"location not for current program");
return;
}
ContextGL()->Uniform1i(location->Location(), x);
}
void WebGLRenderingContextBase::uniform1iv(const WebGLUniformLocation* location,
const FlexibleInt32ArrayView& v) {
if (isContextLost() || !ValidateUniformParameters<WTF::Int32Array>(
"uniform1iv", location, v, 1, 0, v.length()))
return;
ContextGL()->Uniform1iv(location->Location(), v.length(),
v.DataMaybeOnStack());
}
void WebGLRenderingContextBase::uniform1iv(const WebGLUniformLocation* location,
Vector<GLint>& v) {
if (isContextLost() ||
!ValidateUniformParameters("uniform1iv", location, v.Data(), v.size(), 1,
0, v.size()))
return;
ContextGL()->Uniform1iv(location->Location(), v.size(), v.Data());
}
void WebGLRenderingContextBase::uniform2f(const WebGLUniformLocation* location,
GLfloat x,
GLfloat y) {
if (isContextLost() || !location)
return;
if (location->Program() != current_program_) {
SynthesizeGLError(GL_INVALID_OPERATION, "uniform2f",
"location not for current program");
return;
}
ContextGL()->Uniform2f(location->Location(), x, y);
}
void WebGLRenderingContextBase::uniform2fv(const WebGLUniformLocation* location,
const FlexibleFloat32ArrayView& v) {
if (isContextLost() || !ValidateUniformParameters<WTF::Float32Array>(
"uniform2fv", location, v, 2, 0, v.length()))
return;
ContextGL()->Uniform2fv(location->Location(), v.length() >> 1,
v.DataMaybeOnStack());
}
void WebGLRenderingContextBase::uniform2fv(const WebGLUniformLocation* location,
Vector<GLfloat>& v) {
if (isContextLost() ||
!ValidateUniformParameters("uniform2fv", location, v.Data(), v.size(), 2,
0, v.size()))
return;
ContextGL()->Uniform2fv(location->Location(), v.size() >> 1, v.Data());
}
void WebGLRenderingContextBase::uniform2i(const WebGLUniformLocation* location,
GLint x,
GLint y) {
if (isContextLost() || !location)
return;
if (location->Program() != current_program_) {
SynthesizeGLError(GL_INVALID_OPERATION, "uniform2i",
"location not for current program");
return;
}
ContextGL()->Uniform2i(location->Location(), x, y);
}
void WebGLRenderingContextBase::uniform2iv(const WebGLUniformLocation* location,
const FlexibleInt32ArrayView& v) {
if (isContextLost() || !ValidateUniformParameters<WTF::Int32Array>(
"uniform2iv", location, v, 2, 0, v.length()))
return;
ContextGL()->Uniform2iv(location->Location(), v.length() >> 1,
v.DataMaybeOnStack());
}
void WebGLRenderingContextBase::uniform2iv(const WebGLUniformLocation* location,
Vector<GLint>& v) {
if (isContextLost() ||
!ValidateUniformParameters("uniform2iv", location, v.Data(), v.size(), 2,
0, v.size()))
return;
ContextGL()->Uniform2iv(location->Location(), v.size() >> 1, v.Data());
}
void WebGLRenderingContextBase::uniform3f(const WebGLUniformLocation* location,
GLfloat x,
GLfloat y,
GLfloat z) {
if (isContextLost() || !location)
return;
if (location->Program() != current_program_) {
SynthesizeGLError(GL_INVALID_OPERATION, "uniform3f",
"location not for current program");
return;
}
ContextGL()->Uniform3f(location->Location(), x, y, z);
}
void WebGLRenderingContextBase::uniform3fv(const WebGLUniformLocation* location,
const FlexibleFloat32ArrayView& v) {
if (isContextLost() || !ValidateUniformParameters<WTF::Float32Array>(
"uniform3fv", location, v, 3, 0, v.length()))
return;
ContextGL()->Uniform3fv(location->Location(), v.length() / 3,
v.DataMaybeOnStack());
}
void WebGLRenderingContextBase::uniform3fv(const WebGLUniformLocation* location,
Vector<GLfloat>& v) {
if (isContextLost() ||
!ValidateUniformParameters("uniform3fv", location, v.Data(), v.size(), 3,
0, v.size()))
return;
ContextGL()->Uniform3fv(location->Location(), v.size() / 3, v.Data());
}
void WebGLRenderingContextBase::uniform3i(const WebGLUniformLocation* location,
GLint x,
GLint y,
GLint z) {
if (isContextLost() || !location)
return;
if (location->Program() != current_program_) {
SynthesizeGLError(GL_INVALID_OPERATION, "uniform3i",
"location not for current program");
return;
}
ContextGL()->Uniform3i(location->Location(), x, y, z);
}
void WebGLRenderingContextBase::uniform3iv(const WebGLUniformLocation* location,
const FlexibleInt32ArrayView& v) {
if (isContextLost() || !ValidateUniformParameters<WTF::Int32Array>(
"uniform3iv", location, v, 3, 0, v.length()))
return;
ContextGL()->Uniform3iv(location->Location(), v.length() / 3,
v.DataMaybeOnStack());
}
void WebGLRenderingContextBase::uniform3iv(const WebGLUniformLocation* location,
Vector<GLint>& v) {
if (isContextLost() ||
!ValidateUniformParameters("uniform3iv", location, v.Data(), v.size(), 3,
0, v.size()))
return;
ContextGL()->Uniform3iv(location->Location(), v.size() / 3, v.Data());
}
void WebGLRenderingContextBase::uniform4f(const WebGLUniformLocation* location,
GLfloat x,
GLfloat y,
GLfloat z,
GLfloat w) {
if (isContextLost() || !location)
return;
if (location->Program() != current_program_) {
SynthesizeGLError(GL_INVALID_OPERATION, "uniform4f",
"location not for current program");
return;
}
ContextGL()->Uniform4f(location->Location(), x, y, z, w);
}
void WebGLRenderingContextBase::uniform4fv(const WebGLUniformLocation* location,
const FlexibleFloat32ArrayView& v) {
if (isContextLost() || !ValidateUniformParameters<WTF::Float32Array>(
"uniform4fv", location, v, 4, 0, v.length()))
return;
ContextGL()->Uniform4fv(location->Location(), v.length() >> 2,
v.DataMaybeOnStack());
}
void WebGLRenderingContextBase::uniform4fv(const WebGLUniformLocation* location,
Vector<GLfloat>& v) {
if (isContextLost() ||
!ValidateUniformParameters("uniform4fv", location, v.Data(), v.size(), 4,
0, v.size()))
return;
ContextGL()->Uniform4fv(location->Location(), v.size() >> 2, v.Data());
}
void WebGLRenderingContextBase::uniform4i(const WebGLUniformLocation* location,
GLint x,
GLint y,
GLint z,
GLint w) {
if (isContextLost() || !location)
return;
if (location->Program() != current_program_) {
SynthesizeGLError(GL_INVALID_OPERATION, "uniform4i",
"location not for current program");
return;
}
ContextGL()->Uniform4i(location->Location(), x, y, z, w);
}
void WebGLRenderingContextBase::uniform4iv(const WebGLUniformLocation* location,
const FlexibleInt32ArrayView& v) {
if (isContextLost() || !ValidateUniformParameters<WTF::Int32Array>(
"uniform4iv", location, v, 4, 0, v.length()))
return;
ContextGL()->Uniform4iv(location->Location(), v.length() >> 2,
v.DataMaybeOnStack());
}
void WebGLRenderingContextBase::uniform4iv(const WebGLUniformLocation* location,
Vector<GLint>& v) {
if (isContextLost() ||
!ValidateUniformParameters("uniform4iv", location, v.Data(), v.size(), 4,
0, v.size()))
return;
ContextGL()->Uniform4iv(location->Location(), v.size() >> 2, v.Data());
}
void WebGLRenderingContextBase::uniformMatrix2fv(
const WebGLUniformLocation* location,
GLboolean transpose,
NotShared<DOMFloat32Array> v) {
if (isContextLost() ||
!ValidateUniformMatrixParameters("uniformMatrix2fv", location, transpose,
v.View(), 4, 0, v.View()->length()))
return;
ContextGL()->UniformMatrix2fv(location->Location(), v.View()->length() >> 2,
transpose, v.View()->Data());
}
void WebGLRenderingContextBase::uniformMatrix2fv(
const WebGLUniformLocation* location,
GLboolean transpose,
Vector<GLfloat>& v) {
if (isContextLost() ||
!ValidateUniformMatrixParameters("uniformMatrix2fv", location, transpose,
v.Data(), v.size(), 4, 0, v.size()))
return;
ContextGL()->UniformMatrix2fv(location->Location(), v.size() >> 2, transpose,
v.Data());
}
void WebGLRenderingContextBase::uniformMatrix3fv(
const WebGLUniformLocation* location,
GLboolean transpose,
NotShared<DOMFloat32Array> v) {
if (isContextLost() ||
!ValidateUniformMatrixParameters("uniformMatrix3fv", location, transpose,
v.View(), 9, 0, v.View()->length()))
return;
ContextGL()->UniformMatrix3fv(location->Location(), v.View()->length() / 9,
transpose, v.View()->Data());
}
void WebGLRenderingContextBase::uniformMatrix3fv(
const WebGLUniformLocation* location,
GLboolean transpose,
Vector<GLfloat>& v) {
if (isContextLost() ||
!ValidateUniformMatrixParameters("uniformMatrix3fv", location, transpose,
v.Data(), v.size(), 9, 0, v.size()))
return;
ContextGL()->UniformMatrix3fv(location->Location(), v.size() / 9, transpose,
v.Data());
}
void WebGLRenderingContextBase::uniformMatrix4fv(
const WebGLUniformLocation* location,
GLboolean transpose,
NotShared<DOMFloat32Array> v) {
if (isContextLost() ||
!ValidateUniformMatrixParameters("uniformMatrix4fv", location, transpose,
v.View(), 16, 0, v.View()->length()))
return;
ContextGL()->UniformMatrix4fv(location->Location(), v.View()->length() >> 4,
transpose, v.View()->Data());
}
void WebGLRenderingContextBase::uniformMatrix4fv(
const WebGLUniformLocation* location,
GLboolean transpose,
Vector<GLfloat>& v) {
if (isContextLost() ||
!ValidateUniformMatrixParameters("uniformMatrix4fv", location, transpose,
v.Data(), v.size(), 16, 0, v.size()))
return;
ContextGL()->UniformMatrix4fv(location->Location(), v.size() >> 4, transpose,
v.Data());
}
void WebGLRenderingContextBase::useProgram(WebGLProgram* program) {
bool deleted;
if (!CheckObjectToBeBound("useProgram", program, deleted))
return;
if (deleted)
program = 0;
if (program && !program->LinkStatus(this)) {
SynthesizeGLError(GL_INVALID_OPERATION, "useProgram", "program not valid");
return;
}
if (current_program_ != program) {
if (current_program_)
current_program_->OnDetached(ContextGL());
current_program_ = program;
ContextGL()->UseProgram(ObjectOrZero(program));
if (program)
program->OnAttached();
}
}
void WebGLRenderingContextBase::validateProgram(WebGLProgram* program) {
if (isContextLost() || !ValidateWebGLObject("validateProgram", program))
return;
ContextGL()->ValidateProgram(ObjectOrZero(program));
}
void WebGLRenderingContextBase::SetVertexAttribType(
GLuint index,
VertexAttribValueType type) {
if (index < max_vertex_attribs_)
vertex_attrib_type_[index] = type;
}
void WebGLRenderingContextBase::vertexAttrib1f(GLuint index, GLfloat v0) {
if (isContextLost())
return;
ContextGL()->VertexAttrib1f(index, v0);
SetVertexAttribType(index, kFloat32ArrayType);
}
void WebGLRenderingContextBase::vertexAttrib1fv(
GLuint index,
NotShared<const DOMFloat32Array> v) {
if (isContextLost())
return;
if (!v.View() || v.View()->length() < 1) {
SynthesizeGLError(GL_INVALID_VALUE, "vertexAttrib1fv", "invalid array");
return;
}
ContextGL()->VertexAttrib1fv(index, v.View()->Data());
SetVertexAttribType(index, kFloat32ArrayType);
}
void WebGLRenderingContextBase::vertexAttrib1fv(GLuint index,
const Vector<GLfloat>& v) {
if (isContextLost())
return;
if (v.size() < 1) {
SynthesizeGLError(GL_INVALID_VALUE, "vertexAttrib1fv", "invalid array");
return;
}
ContextGL()->VertexAttrib1fv(index, v.Data());
SetVertexAttribType(index, kFloat32ArrayType);
}
void WebGLRenderingContextBase::vertexAttrib2f(GLuint index,
GLfloat v0,
GLfloat v1) {
if (isContextLost())
return;
ContextGL()->VertexAttrib2f(index, v0, v1);
SetVertexAttribType(index, kFloat32ArrayType);
}
void WebGLRenderingContextBase::vertexAttrib2fv(
GLuint index,
NotShared<const DOMFloat32Array> v) {
if (isContextLost())
return;
if (!v.View() || v.View()->length() < 2) {
SynthesizeGLError(GL_INVALID_VALUE, "vertexAttrib2fv", "invalid array");
return;
}
ContextGL()->VertexAttrib2fv(index, v.View()->Data());
SetVertexAttribType(index, kFloat32ArrayType);
}
void WebGLRenderingContextBase::vertexAttrib2fv(GLuint index,
const Vector<GLfloat>& v) {
if (isContextLost())
return;
if (v.size() < 2) {
SynthesizeGLError(GL_INVALID_VALUE, "vertexAttrib2fv", "invalid array");
return;
}
ContextGL()->VertexAttrib2fv(index, v.Data());
SetVertexAttribType(index, kFloat32ArrayType);
}
void WebGLRenderingContextBase::vertexAttrib3f(GLuint index,
GLfloat v0,
GLfloat v1,
GLfloat v2) {
if (isContextLost())
return;
ContextGL()->VertexAttrib3f(index, v0, v1, v2);
SetVertexAttribType(index, kFloat32ArrayType);
}
void WebGLRenderingContextBase::vertexAttrib3fv(
GLuint index,
NotShared<const DOMFloat32Array> v) {
if (isContextLost())
return;
if (!v.View() || v.View()->length() < 3) {
SynthesizeGLError(GL_INVALID_VALUE, "vertexAttrib3fv", "invalid array");
return;
}
ContextGL()->VertexAttrib3fv(index, v.View()->Data());
SetVertexAttribType(index, kFloat32ArrayType);
}
void WebGLRenderingContextBase::vertexAttrib3fv(GLuint index,
const Vector<GLfloat>& v) {
if (isContextLost())
return;
if (v.size() < 3) {
SynthesizeGLError(GL_INVALID_VALUE, "vertexAttrib3fv", "invalid array");
return;
}
ContextGL()->VertexAttrib3fv(index, v.Data());
SetVertexAttribType(index, kFloat32ArrayType);
}
void WebGLRenderingContextBase::vertexAttrib4f(GLuint index,
GLfloat v0,
GLfloat v1,
GLfloat v2,
GLfloat v3) {
if (isContextLost())
return;
ContextGL()->VertexAttrib4f(index, v0, v1, v2, v3);
SetVertexAttribType(index, kFloat32ArrayType);
}
void WebGLRenderingContextBase::vertexAttrib4fv(
GLuint index,
NotShared<const DOMFloat32Array> v) {
if (isContextLost())
return;
if (!v.View() || v.View()->length() < 4) {
SynthesizeGLError(GL_INVALID_VALUE, "vertexAttrib4fv", "invalid array");
return;
}
ContextGL()->VertexAttrib4fv(index, v.View()->Data());
SetVertexAttribType(index, kFloat32ArrayType);
}
void WebGLRenderingContextBase::vertexAttrib4fv(GLuint index,
const Vector<GLfloat>& v) {
if (isContextLost())
return;
if (v.size() < 4) {
SynthesizeGLError(GL_INVALID_VALUE, "vertexAttrib4fv", "invalid array");
return;
}
ContextGL()->VertexAttrib4fv(index, v.Data());
SetVertexAttribType(index, kFloat32ArrayType);
}
void WebGLRenderingContextBase::vertexAttribPointer(GLuint index,
GLint size,
GLenum type,
GLboolean normalized,
GLsizei stride,
long long offset) {
if (isContextLost())
return;
if (index >= max_vertex_attribs_) {
SynthesizeGLError(GL_INVALID_VALUE, "vertexAttribPointer",
"index out of range");
return;
}
if (!ValidateValueFitNonNegInt32("vertexAttribPointer", "offset", offset))
return;
if (!bound_array_buffer_ && offset != 0) {
SynthesizeGLError(GL_INVALID_OPERATION, "vertexAttribPointer",
"no ARRAY_BUFFER is bound and offset is non-zero");
return;
}
bound_vertex_array_object_->SetArrayBufferForAttrib(
index, bound_array_buffer_.Get());
ContextGL()->VertexAttribPointer(
index, size, type, normalized, stride,
reinterpret_cast<void*>(static_cast<intptr_t>(offset)));
}
void WebGLRenderingContextBase::VertexAttribDivisorANGLE(GLuint index,
GLuint divisor) {
if (isContextLost())
return;
if (index >= max_vertex_attribs_) {
SynthesizeGLError(GL_INVALID_VALUE, "vertexAttribDivisorANGLE",
"index out of range");
return;
}
ContextGL()->VertexAttribDivisorANGLE(index, divisor);
}
void WebGLRenderingContextBase::viewport(GLint x,
GLint y,
GLsizei width,
GLsizei height) {
if (isContextLost())
return;
ContextGL()->Viewport(x, y, width, height);
}
// Added to provide a unified interface with CanvasRenderingContext2D. Prefer
// calling forceLostContext instead.
void WebGLRenderingContextBase::LoseContext(LostContextMode mode) {
ForceLostContext(mode, kManual);
}
void WebGLRenderingContextBase::ForceLostContext(
LostContextMode mode,
AutoRecoveryMethod auto_recovery_method) {
if (isContextLost()) {
SynthesizeGLError(GL_INVALID_OPERATION, "loseContext",
"context already lost");
return;
}
context_group_->LoseContextGroup(mode, auto_recovery_method);
}
void WebGLRenderingContextBase::LoseContextImpl(
WebGLRenderingContextBase::LostContextMode mode,
AutoRecoveryMethod auto_recovery_method) {
if (isContextLost())
return;
context_lost_mode_ = mode;
ASSERT(context_lost_mode_ != kNotLostContext);
auto_recovery_method_ = auto_recovery_method;
// Lose all the extensions.
for (size_t i = 0; i < extensions_.size(); ++i) {
ExtensionTracker* tracker = extensions_[i];
tracker->LoseExtension(false);
}
for (size_t i = 0; i < kWebGLExtensionNameCount; ++i)
extension_enabled_[i] = false;
RemoveAllCompressedTextureFormats();
if (mode != kRealLostContext)
DestroyContext();
ConsoleDisplayPreference display =
(mode == kRealLostContext) ? kDisplayInConsole : kDontDisplayInConsole;
SynthesizeGLError(GC3D_CONTEXT_LOST_WEBGL, "loseContext", "context lost",
display);
// Don't allow restoration unless the context lost event has both been
// dispatched and its default behavior prevented.
restore_allowed_ = false;
DeactivateContext(this);
if (auto_recovery_method_ == kWhenAvailable)
AddToEvictedList(this);
// Always defer the dispatch of the context lost event, to implement
// the spec behavior of queueing a task.
dispatch_context_lost_event_timer_.StartOneShot(0, BLINK_FROM_HERE);
}
void WebGLRenderingContextBase::ForceRestoreContext() {
if (!isContextLost()) {
SynthesizeGLError(GL_INVALID_OPERATION, "restoreContext",
"context not lost");
return;
}
if (!restore_allowed_) {
if (context_lost_mode_ == kWebGLLoseContextLostContext)
SynthesizeGLError(GL_INVALID_OPERATION, "restoreContext",
"context restoration not allowed");
return;
}
if (!restore_timer_.IsActive())
restore_timer_.StartOneShot(0, BLINK_FROM_HERE);
}
uint32_t WebGLRenderingContextBase::NumberOfContextLosses() const {
return context_group_->NumberOfContextLosses();
}
WebLayer* WebGLRenderingContextBase::PlatformLayer() const {
return isContextLost() ? 0 : GetDrawingBuffer()->PlatformLayer();
}
void WebGLRenderingContextBase::SetFilterQuality(
SkFilterQuality filter_quality) {
if (!isContextLost() && GetDrawingBuffer()) {
GetDrawingBuffer()->SetFilterQuality(filter_quality);
}
}
Extensions3DUtil* WebGLRenderingContextBase::ExtensionsUtil() {
if (!extensions_util_) {
gpu::gles2::GLES2Interface* gl = ContextGL();
extensions_util_ = Extensions3DUtil::Create(gl);
// The only reason the ExtensionsUtil should be invalid is if the gl context
// is lost.
ASSERT(extensions_util_->IsValid() ||
gl->GetGraphicsResetStatusKHR() != GL_NO_ERROR);
}
return extensions_util_.get();
}
void WebGLRenderingContextBase::Stop() {
if (!isContextLost()) {
// Never attempt to restore the context because the page is being torn down.
ForceLostContext(kSyntheticLostContext, kManual);
}
}
bool WebGLRenderingContextBase::DrawingBufferClientIsBoundForDraw() {
return !framebuffer_binding_;
}
void WebGLRenderingContextBase::DrawingBufferClientRestoreScissorTest() {
if (!ContextGL())
return;
if (scissor_enabled_)
ContextGL()->Enable(GL_SCISSOR_TEST);
else
ContextGL()->Disable(GL_SCISSOR_TEST);
}
void WebGLRenderingContextBase::DrawingBufferClientRestoreMaskAndClearValues() {
if (!ContextGL())
return;
bool color_mask_alpha =
color_mask_[3] && active_scoped_rgb_emulation_color_masks_ == 0;
ContextGL()->ColorMask(color_mask_[0], color_mask_[1], color_mask_[2],
color_mask_alpha);
ContextGL()->DepthMask(depth_mask_);
ContextGL()->StencilMaskSeparate(GL_FRONT, stencil_mask_);
ContextGL()->ClearColor(clear_color_[0], clear_color_[1], clear_color_[2],
clear_color_[3]);
ContextGL()->ClearDepthf(clear_depth_);
ContextGL()->ClearStencil(clear_stencil_);
}
void WebGLRenderingContextBase::DrawingBufferClientRestorePixelPackAlignment() {
if (!ContextGL())
return;
ContextGL()->PixelStorei(GL_PACK_ALIGNMENT, pack_alignment_);
}
void WebGLRenderingContextBase::DrawingBufferClientRestoreTexture2DBinding() {
if (!ContextGL())
return;
RestoreCurrentTexture2D();
}
void WebGLRenderingContextBase::
DrawingBufferClientRestoreRenderbufferBinding() {
if (!ContextGL())
return;
ContextGL()->BindRenderbuffer(GL_RENDERBUFFER,
ObjectOrZero(renderbuffer_binding_.Get()));
}
void WebGLRenderingContextBase::DrawingBufferClientRestoreFramebufferBinding() {
if (!ContextGL())
return;
RestoreCurrentFramebuffer();
}
void WebGLRenderingContextBase::
DrawingBufferClientRestorePixelUnpackBufferBinding() {}
ScriptValue WebGLRenderingContextBase::GetBooleanParameter(
ScriptState* script_state,
GLenum pname) {
GLboolean value = 0;
if (!isContextLost())
ContextGL()->GetBooleanv(pname, &value);
return WebGLAny(script_state, static_cast<bool>(value));
}
ScriptValue WebGLRenderingContextBase::GetBooleanArrayParameter(
ScriptState* script_state,
GLenum pname) {
if (pname != GL_COLOR_WRITEMASK) {
NOTIMPLEMENTED();
return WebGLAny(script_state, 0, 0);
}
GLboolean value[4] = {0};
if (!isContextLost())
ContextGL()->GetBooleanv(pname, value);
bool bool_value[4];
for (int ii = 0; ii < 4; ++ii)
bool_value[ii] = static_cast<bool>(value[ii]);
return WebGLAny(script_state, bool_value, 4);
}
ScriptValue WebGLRenderingContextBase::GetFloatParameter(
ScriptState* script_state,
GLenum pname) {
GLfloat value = 0;
if (!isContextLost())
ContextGL()->GetFloatv(pname, &value);
return WebGLAny(script_state, value);
}
ScriptValue WebGLRenderingContextBase::GetIntParameter(
ScriptState* script_state,
GLenum pname) {
GLint value = 0;
if (!isContextLost()) {
ContextGL()->GetIntegerv(pname, &value);
switch (pname) {
case GL_IMPLEMENTATION_COLOR_READ_FORMAT:
case GL_IMPLEMENTATION_COLOR_READ_TYPE:
if (value == 0) {
// This indicates read framebuffer is incomplete and an
// INVALID_OPERATION has been generated.
return ScriptValue::CreateNull(script_state);
}
break;
default:
break;
}
}
return WebGLAny(script_state, value);
}
ScriptValue WebGLRenderingContextBase::GetInt64Parameter(
ScriptState* script_state,
GLenum pname) {
GLint64 value = 0;
if (!isContextLost())
ContextGL()->GetInteger64v(pname, &value);
return WebGLAny(script_state, value);
}
ScriptValue WebGLRenderingContextBase::GetUnsignedIntParameter(
ScriptState* script_state,
GLenum pname) {
GLint value = 0;
if (!isContextLost())
ContextGL()->GetIntegerv(pname, &value);
return WebGLAny(script_state, static_cast<unsigned>(value));
}
ScriptValue WebGLRenderingContextBase::GetWebGLFloatArrayParameter(
ScriptState* script_state,
GLenum pname) {
GLfloat value[4] = {0};
if (!isContextLost())
ContextGL()->GetFloatv(pname, value);
unsigned length = 0;
switch (pname) {
case GL_ALIASED_POINT_SIZE_RANGE:
case GL_ALIASED_LINE_WIDTH_RANGE:
case GL_DEPTH_RANGE:
length = 2;
break;
case GL_BLEND_COLOR:
case GL_COLOR_CLEAR_VALUE:
length = 4;
break;
default:
NOTIMPLEMENTED();
}
return WebGLAny(script_state, DOMFloat32Array::Create(value, length));
}
ScriptValue WebGLRenderingContextBase::GetWebGLIntArrayParameter(
ScriptState* script_state,
GLenum pname) {
GLint value[4] = {0};
if (!isContextLost())
ContextGL()->GetIntegerv(pname, value);
unsigned length = 0;
switch (pname) {
case GL_MAX_VIEWPORT_DIMS:
length = 2;
break;
case GL_SCISSOR_BOX:
case GL_VIEWPORT:
length = 4;
break;
default:
NOTIMPLEMENTED();
}
return WebGLAny(script_state, DOMInt32Array::Create(value, length));
}
WebGLTexture* WebGLRenderingContextBase::ValidateTexture2DBinding(
const char* function_name,
GLenum target) {
WebGLTexture* tex = nullptr;
switch (target) {
case GL_TEXTURE_2D:
tex = texture_units_[active_texture_unit_].texture2d_binding_.Get();
break;
case GL_TEXTURE_CUBE_MAP_POSITIVE_X:
case GL_TEXTURE_CUBE_MAP_NEGATIVE_X:
case GL_TEXTURE_CUBE_MAP_POSITIVE_Y:
case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y:
case GL_TEXTURE_CUBE_MAP_POSITIVE_Z:
case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z:
tex =
texture_units_[active_texture_unit_].texture_cube_map_binding_.Get();
break;
default:
SynthesizeGLError(GL_INVALID_ENUM, function_name,
"invalid texture target");
return nullptr;
}
if (!tex)
SynthesizeGLError(GL_INVALID_OPERATION, function_name,
"no texture bound to target");
return tex;
}
WebGLTexture* WebGLRenderingContextBase::ValidateTextureBinding(
const char* function_name,
GLenum target) {
WebGLTexture* tex = nullptr;
switch (target) {
case GL_TEXTURE_2D:
tex = texture_units_[active_texture_unit_].texture2d_binding_.Get();
break;
case GL_TEXTURE_CUBE_MAP:
tex =
texture_units_[active_texture_unit_].texture_cube_map_binding_.Get();
break;
case GL_TEXTURE_3D:
if (!IsWebGL2OrHigher()) {
SynthesizeGLError(GL_INVALID_ENUM, function_name,
"invalid texture target");
return nullptr;
}
tex = texture_units_[active_texture_unit_].texture3d_binding_.Get();
break;
case GL_TEXTURE_2D_ARRAY:
if (!IsWebGL2OrHigher()) {
SynthesizeGLError(GL_INVALID_ENUM, function_name,
"invalid texture target");
return nullptr;
}
tex = texture_units_[active_texture_unit_].texture2d_array_binding_.Get();
break;
default:
SynthesizeGLError(GL_INVALID_ENUM, function_name,
"invalid texture target");
return nullptr;
}
if (!tex)
SynthesizeGLError(GL_INVALID_OPERATION, function_name,
"no texture bound to target");
return tex;
}
bool WebGLRenderingContextBase::ValidateLocationLength(
const char* function_name,
const String& string) {
const unsigned max_web_gl_location_length = GetMaxWebGLLocationLength();
if (string.length() > max_web_gl_location_length) {
SynthesizeGLError(GL_INVALID_VALUE, function_name, "location length > 256");
return false;
}
return true;
}
bool WebGLRenderingContextBase::ValidateSize(const char* function_name,
GLint x,
GLint y,
GLint z) {
if (x < 0 || y < 0 || z < 0) {
SynthesizeGLError(GL_INVALID_VALUE, function_name, "size < 0");
return false;
}
return true;
}
bool WebGLRenderingContextBase::ValidateString(const char* function_name,
const String& string) {
for (size_t i = 0; i < string.length(); ++i) {
if (!ValidateCharacter(string[i])) {
SynthesizeGLError(GL_INVALID_VALUE, function_name, "string not ASCII");
return false;
}
}
return true;
}
bool WebGLRenderingContextBase::ValidateShaderSource(const String& string) {
for (size_t i = 0; i < string.length(); ++i) {
// line-continuation character \ is supported in WebGL 2.0.
if (IsWebGL2OrHigher() && string[i] == '\\') {
continue;
}
if (!ValidateCharacter(string[i])) {
SynthesizeGLError(GL_INVALID_VALUE, "shaderSource", "string not ASCII");
return false;
}
}
return true;
}
void WebGLRenderingContextBase::AddExtensionSupportedFormatsTypes() {
if (!is_oes_texture_float_formats_types_added_ &&
ExtensionEnabled(kOESTextureFloatName)) {
ADD_VALUES_TO_SET(supported_types_, kSupportedTypesOESTexFloat);
ADD_VALUES_TO_SET(supported_tex_image_source_types_,
kSupportedTypesOESTexFloat);
is_oes_texture_float_formats_types_added_ = true;
}
if (!is_oes_texture_half_float_formats_types_added_ &&
ExtensionEnabled(kOESTextureHalfFloatName)) {
ADD_VALUES_TO_SET(supported_types_, kSupportedTypesOESTexHalfFloat);
ADD_VALUES_TO_SET(supported_tex_image_source_types_,
kSupportedTypesOESTexHalfFloat);
is_oes_texture_half_float_formats_types_added_ = true;
}
if (!is_web_gl_depth_texture_formats_types_added_ &&
ExtensionEnabled(kWebGLDepthTextureName)) {
ADD_VALUES_TO_SET(supported_internal_formats_,
kSupportedInternalFormatsOESDepthTex);
ADD_VALUES_TO_SET(supported_tex_image_source_internal_formats_,
kSupportedInternalFormatsOESDepthTex);
ADD_VALUES_TO_SET(supported_formats_, kSupportedFormatsOESDepthTex);
ADD_VALUES_TO_SET(supported_tex_image_source_formats_,
kSupportedFormatsOESDepthTex);
ADD_VALUES_TO_SET(supported_types_, kSupportedTypesOESDepthTex);
ADD_VALUES_TO_SET(supported_tex_image_source_types_,
kSupportedTypesOESDepthTex);
is_web_gl_depth_texture_formats_types_added_ = true;
}
if (!is_ex_ts_rgb_formats_types_added_ && ExtensionEnabled(kEXTsRGBName)) {
ADD_VALUES_TO_SET(supported_internal_formats_,
kSupportedInternalFormatsEXTsRGB);
ADD_VALUES_TO_SET(supported_tex_image_source_internal_formats_,
kSupportedInternalFormatsEXTsRGB);
ADD_VALUES_TO_SET(supported_formats_, kSupportedFormatsEXTsRGB);
ADD_VALUES_TO_SET(supported_tex_image_source_formats_,
kSupportedFormatsEXTsRGB);
is_ex_ts_rgb_formats_types_added_ = true;
}
}
bool WebGLRenderingContextBase::ValidateTexImageSourceFormatAndType(
const char* function_name,
TexImageFunctionType function_type,
GLenum internalformat,
GLenum format,
GLenum type) {
if (!is_web_gl2_tex_image_source_formats_types_added_ && IsWebGL2OrHigher()) {
ADD_VALUES_TO_SET(supported_tex_image_source_internal_formats_,
kSupportedInternalFormatsTexImageSourceES3);
ADD_VALUES_TO_SET(supported_tex_image_source_formats_,
kSupportedFormatsTexImageSourceES3);
ADD_VALUES_TO_SET(supported_tex_image_source_types_,
kSupportedTypesTexImageSourceES3);
is_web_gl2_tex_image_source_formats_types_added_ = true;
}
if (!IsWebGL2OrHigher()) {
AddExtensionSupportedFormatsTypes();
}
if (internalformat != 0 &&
supported_tex_image_source_internal_formats_.find(internalformat) ==
supported_tex_image_source_internal_formats_.end()) {
if (function_type == kTexImage) {
SynthesizeGLError(GL_INVALID_VALUE, function_name,
"invalid internalformat");
} else {
SynthesizeGLError(GL_INVALID_ENUM, function_name,
"invalid internalformat");
}
return false;
}
if (supported_tex_image_source_formats_.find(format) ==
supported_tex_image_source_formats_.end()) {
SynthesizeGLError(GL_INVALID_ENUM, function_name, "invalid format");
return false;
}
if (supported_tex_image_source_types_.find(type) ==
supported_tex_image_source_types_.end()) {
SynthesizeGLError(GL_INVALID_ENUM, function_name, "invalid type");
return false;
}
return true;
}
bool WebGLRenderingContextBase::ValidateTexFuncFormatAndType(
const char* function_name,
TexImageFunctionType function_type,
GLenum internalformat,
GLenum format,
GLenum type,
GLint level) {
if (!is_web_gl2_formats_types_added_ && IsWebGL2OrHigher()) {
ADD_VALUES_TO_SET(supported_internal_formats_,
kSupportedInternalFormatsES3);
ADD_VALUES_TO_SET(supported_internal_formats_,
kSupportedInternalFormatsTexImageES3);
ADD_VALUES_TO_SET(supported_formats_, kSupportedFormatsES3);
ADD_VALUES_TO_SET(supported_types_, kSupportedTypesES3);
is_web_gl2_formats_types_added_ = true;
}
if (!IsWebGL2OrHigher()) {
AddExtensionSupportedFormatsTypes();
}
if (internalformat != 0 && supported_internal_formats_.find(internalformat) ==
supported_internal_formats_.end()) {
if (function_type == kTexImage) {
SynthesizeGLError(GL_INVALID_VALUE, function_name,
"invalid internalformat");
} else {
SynthesizeGLError(GL_INVALID_ENUM, function_name,
"invalid internalformat");
}
return false;
}
if (supported_formats_.find(format) == supported_formats_.end()) {
SynthesizeGLError(GL_INVALID_ENUM, function_name, "invalid format");
return false;
}
if (supported_types_.find(type) == supported_types_.end()) {
SynthesizeGLError(GL_INVALID_ENUM, function_name, "invalid type");
return false;
}
if (format == GL_DEPTH_COMPONENT && level > 0 && !IsWebGL2OrHigher()) {
SynthesizeGLError(GL_INVALID_OPERATION, function_name,
"level must be 0 for DEPTH_COMPONENT format");
return false;
}
if (format == GL_DEPTH_STENCIL_OES && level > 0 && !IsWebGL2OrHigher()) {
SynthesizeGLError(GL_INVALID_OPERATION, function_name,
"level must be 0 for DEPTH_STENCIL format");
return false;
}
return true;
}
GLint WebGLRenderingContextBase::GetMaxTextureLevelForTarget(GLenum target) {
switch (target) {
case GL_TEXTURE_2D:
return max_texture_level_;
case GL_TEXTURE_CUBE_MAP:
case GL_TEXTURE_CUBE_MAP_POSITIVE_X:
case GL_TEXTURE_CUBE_MAP_NEGATIVE_X:
case GL_TEXTURE_CUBE_MAP_POSITIVE_Y:
case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y:
case GL_TEXTURE_CUBE_MAP_POSITIVE_Z:
case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z:
return max_cube_map_texture_level_;
}
return 0;
}
bool WebGLRenderingContextBase::ValidateTexFuncLevel(const char* function_name,
GLenum target,
GLint level) {
if (level < 0) {
SynthesizeGLError(GL_INVALID_VALUE, function_name, "level < 0");
return false;
}
GLint max_level = GetMaxTextureLevelForTarget(target);
if (max_level && level >= max_level) {
SynthesizeGLError(GL_INVALID_VALUE, function_name, "level out of range");
return false;
}
// This function only checks if level is legal, so we return true and don't
// generate INVALID_ENUM if target is illegal.
return true;
}
bool WebGLRenderingContextBase::ValidateTexFuncDimensions(
const char* function_name,
TexImageFunctionType function_type,
GLenum target,
GLint level,
GLsizei width,
GLsizei height,
GLsizei depth) {
if (width < 0 || height < 0 || depth < 0) {
SynthesizeGLError(GL_INVALID_VALUE, function_name,
"width, height or depth < 0");
return false;
}
switch (target) {
case GL_TEXTURE_2D:
if (width > (max_texture_size_ >> level) ||
height > (max_texture_size_ >> level)) {
SynthesizeGLError(GL_INVALID_VALUE, function_name,
"width or height out of range");
return false;
}
break;
case GL_TEXTURE_CUBE_MAP_POSITIVE_X:
case GL_TEXTURE_CUBE_MAP_NEGATIVE_X:
case GL_TEXTURE_CUBE_MAP_POSITIVE_Y:
case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y:
case GL_TEXTURE_CUBE_MAP_POSITIVE_Z:
case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z:
if (function_type != kTexSubImage && width != height) {
SynthesizeGLError(GL_INVALID_VALUE, function_name,
"width != height for cube map");
return false;
}
// No need to check height here. For texImage width == height.
// For texSubImage that will be checked when checking yoffset + height is
// in range.
if (width > (max_cube_map_texture_size_ >> level)) {
SynthesizeGLError(GL_INVALID_VALUE, function_name,
"width or height out of range for cube map");
return false;
}
break;
case GL_TEXTURE_3D:
if (IsWebGL2OrHigher()) {
if (width > (max3d_texture_size_ >> level) ||
height > (max3d_texture_size_ >> level) ||
depth > (max3d_texture_size_ >> level)) {
SynthesizeGLError(GL_INVALID_VALUE, function_name,
"width, height or depth out of range");
return false;
}
break;
}
case GL_TEXTURE_2D_ARRAY:
if (IsWebGL2OrHigher()) {
if (width > (max_texture_size_ >> level) ||
height > (max_texture_size_ >> level) ||
depth > max_array_texture_layers_) {
SynthesizeGLError(GL_INVALID_VALUE, function_name,
"width, height or depth out of range");
return false;
}
break;
}
default:
SynthesizeGLError(GL_INVALID_ENUM, function_name, "invalid target");
return false;
}
return true;
}
bool WebGLRenderingContextBase::ValidateTexFuncParameters(
const char* function_name,
TexImageFunctionType function_type,
TexFuncValidationSourceType source_type,
GLenum target,
GLint level,
GLenum internalformat,
GLsizei width,
GLsizei height,
GLsizei depth,
GLint border,
GLenum format,
GLenum type) {
// We absolutely have to validate the format and type combination.
// The texImage2D entry points taking HTMLImage, etc. will produce
// temporary data based on this combination, so it must be legal.
if (source_type == kSourceHTMLImageElement ||
source_type == kSourceHTMLCanvasElement ||
source_type == kSourceHTMLVideoElement ||
source_type == kSourceImageData || source_type == kSourceImageBitmap) {
if (!ValidateTexImageSourceFormatAndType(function_name, function_type,
internalformat, format, type)) {
return false;
}
} else {
if (!ValidateTexFuncFormatAndType(function_name, function_type,
internalformat, format, type, level)) {
return false;
}
}
if (!ValidateTexFuncDimensions(function_name, function_type, target, level,
width, height, depth))
return false;
if (border) {
SynthesizeGLError(GL_INVALID_VALUE, function_name, "border != 0");
return false;
}
return true;
}
bool WebGLRenderingContextBase::ValidateTexFuncData(
const char* function_name,
TexImageDimension tex_dimension,
GLint level,
GLsizei width,
GLsizei height,
GLsizei depth,
GLenum format,
GLenum type,
DOMArrayBufferView* pixels,
NullDisposition disposition,
GLuint src_offset) {
// All calling functions check isContextLost, so a duplicate check is not
// needed here.
if (!pixels) {
DCHECK_NE(disposition, kNullNotReachable);
if (disposition == kNullAllowed)
return true;
SynthesizeGLError(GL_INVALID_VALUE, function_name, "no pixels");
return false;
}
if (!ValidateSettableTexFormat(function_name, format))
return false;
switch (type) {
case GL_BYTE:
if (pixels->GetType() != DOMArrayBufferView::kTypeInt8) {
SynthesizeGLError(GL_INVALID_OPERATION, function_name,
"type BYTE but ArrayBufferView not Int8Array");
return false;
}
break;
case GL_UNSIGNED_BYTE:
if (pixels->GetType() != DOMArrayBufferView::kTypeUint8) {
SynthesizeGLError(
GL_INVALID_OPERATION, function_name,
"type UNSIGNED_BYTE but ArrayBufferView not Uint8Array");
return false;
}
break;
case GL_SHORT:
if (pixels->GetType() != DOMArrayBufferView::kTypeInt16) {
SynthesizeGLError(GL_INVALID_OPERATION, function_name,
"type SHORT but ArrayBufferView not Int16Array");
return false;
}
break;
case GL_UNSIGNED_SHORT:
case GL_UNSIGNED_SHORT_5_6_5:
case GL_UNSIGNED_SHORT_4_4_4_4:
case GL_UNSIGNED_SHORT_5_5_5_1:
if (pixels->GetType() != DOMArrayBufferView::kTypeUint16) {
SynthesizeGLError(
GL_INVALID_OPERATION, function_name,
"type UNSIGNED_SHORT but ArrayBufferView not Uint16Array");
return false;
}
break;
case GL_INT:
if (pixels->GetType() != DOMArrayBufferView::kTypeInt32) {
SynthesizeGLError(GL_INVALID_OPERATION, function_name,
"type INT but ArrayBufferView not Int32Array");
return false;
}
break;
case GL_UNSIGNED_INT:
case GL_UNSIGNED_INT_2_10_10_10_REV:
case GL_UNSIGNED_INT_10F_11F_11F_REV:
case GL_UNSIGNED_INT_5_9_9_9_REV:
case GL_UNSIGNED_INT_24_8:
if (pixels->GetType() != DOMArrayBufferView::kTypeUint32) {
SynthesizeGLError(
GL_INVALID_OPERATION, function_name,
"type UNSIGNED_INT but ArrayBufferView not Uint32Array");
return false;
}
break;
case GL_FLOAT: // OES_texture_float
if (pixels->GetType() != DOMArrayBufferView::kTypeFloat32) {
SynthesizeGLError(GL_INVALID_OPERATION, function_name,
"type FLOAT but ArrayBufferView not Float32Array");
return false;
}
break;
case GL_HALF_FLOAT:
case GL_HALF_FLOAT_OES: // OES_texture_half_float
// As per the specification, ArrayBufferView should be null or a
// Uint16Array when OES_texture_half_float is enabled.
if (pixels->GetType() != DOMArrayBufferView::kTypeUint16) {
SynthesizeGLError(GL_INVALID_OPERATION, function_name,
"type HALF_FLOAT_OES but ArrayBufferView is not NULL "
"and not Uint16Array");
return false;
}
break;
case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
SynthesizeGLError(GL_INVALID_OPERATION, function_name,
"type FLOAT_32_UNSIGNED_INT_24_8_REV but "
"ArrayBufferView is not NULL");
return false;
default:
ASSERT_NOT_REACHED();
}
unsigned total_bytes_required, skip_bytes;
GLenum error = WebGLImageConversion::ComputeImageSizeInBytes(
format, type, width, height, depth,
GetUnpackPixelStoreParams(tex_dimension), &total_bytes_required, 0,
&skip_bytes);
if (error != GL_NO_ERROR) {
SynthesizeGLError(error, function_name, "invalid texture dimensions");
return false;
}
CheckedNumeric<uint32_t> total = src_offset;
total *= pixels->TypeSize();
total += total_bytes_required;
total += skip_bytes;
if (!total.IsValid() || pixels->byteLength() < total.ValueOrDie()) {
SynthesizeGLError(GL_INVALID_OPERATION, function_name,
"ArrayBufferView not big enough for request");
return false;
}
return true;
}
bool WebGLRenderingContextBase::ValidateCompressedTexFormat(
const char* function_name,
GLenum format) {
if (!compressed_texture_formats_.Contains(format)) {
SynthesizeGLError(GL_INVALID_ENUM, function_name, "invalid format");
return false;
}
return true;
}
bool WebGLRenderingContextBase::ValidateStencilSettings(
const char* function_name) {
if (stencil_mask_ != stencil_mask_back_ ||
stencil_func_ref_ != stencil_func_ref_back_ ||
stencil_func_mask_ != stencil_func_mask_back_) {
SynthesizeGLError(GL_INVALID_OPERATION, function_name,
"front and back stencils settings do not match");
return false;
}
return true;
}
bool WebGLRenderingContextBase::ValidateStencilOrDepthFunc(
const char* function_name,
GLenum func) {
switch (func) {
case GL_NEVER:
case GL_LESS:
case GL_LEQUAL:
case GL_GREATER:
case GL_GEQUAL:
case GL_EQUAL:
case GL_NOTEQUAL:
case GL_ALWAYS:
return true;
default:
SynthesizeGLError(GL_INVALID_ENUM, function_name, "invalid function");
return false;
}
}
void WebGLRenderingContextBase::PrintGLErrorToConsole(const String& message) {
if (!num_gl_errors_to_console_allowed_)
return;
--num_gl_errors_to_console_allowed_;
PrintWarningToConsole(message);
if (!num_gl_errors_to_console_allowed_)
PrintWarningToConsole(
"WebGL: too many errors, no more errors will be reported to the "
"console for this context.");
return;
}
void WebGLRenderingContextBase::PrintWarningToConsole(const String& message) {
if (!canvas())
return;
canvas()->GetDocument().AddConsoleMessage(ConsoleMessage::Create(
kRenderingMessageSource, kWarningMessageLevel, message));
}
bool WebGLRenderingContextBase::ValidateFramebufferFuncParameters(
const char* function_name,
GLenum target,
GLenum attachment) {
if (!ValidateFramebufferTarget(target)) {
SynthesizeGLError(GL_INVALID_ENUM, function_name, "invalid target");
return false;
}
switch (attachment) {
case GL_COLOR_ATTACHMENT0:
case GL_DEPTH_ATTACHMENT:
case GL_STENCIL_ATTACHMENT:
case GL_DEPTH_STENCIL_ATTACHMENT:
break;
default:
if ((ExtensionEnabled(kWebGLDrawBuffersName) || IsWebGL2OrHigher()) &&
attachment > GL_COLOR_ATTACHMENT0 &&
attachment <
static_cast<GLenum>(GL_COLOR_ATTACHMENT0 + MaxColorAttachments()))
break;
SynthesizeGLError(GL_INVALID_ENUM, function_name, "invalid attachment");
return false;
}
return true;
}
bool WebGLRenderingContextBase::ValidateBlendEquation(const char* function_name,
GLenum mode) {
switch (mode) {
case GL_FUNC_ADD:
case GL_FUNC_SUBTRACT:
case GL_FUNC_REVERSE_SUBTRACT:
return true;
case GL_MIN_EXT:
case GL_MAX_EXT:
if (ExtensionEnabled(kEXTBlendMinMaxName) || IsWebGL2OrHigher())
return true;
SynthesizeGLError(GL_INVALID_ENUM, function_name, "invalid mode");
return false;
default:
SynthesizeGLError(GL_INVALID_ENUM, function_name, "invalid mode");
return false;
}
}
bool WebGLRenderingContextBase::ValidateBlendFuncFactors(
const char* function_name,
GLenum src,
GLenum dst) {
if (((src == GL_CONSTANT_COLOR || src == GL_ONE_MINUS_CONSTANT_COLOR) &&
(dst == GL_CONSTANT_ALPHA || dst == GL_ONE_MINUS_CONSTANT_ALPHA)) ||
((dst == GL_CONSTANT_COLOR || dst == GL_ONE_MINUS_CONSTANT_COLOR) &&
(src == GL_CONSTANT_ALPHA || src == GL_ONE_MINUS_CONSTANT_ALPHA))) {
SynthesizeGLError(GL_INVALID_OPERATION, function_name,
"incompatible src and dst");
return false;
}
return true;
}
bool WebGLRenderingContextBase::ValidateCapability(const char* function_name,
GLenum cap) {
switch (cap) {
case GL_BLEND:
case GL_CULL_FACE:
case GL_DEPTH_TEST:
case GL_DITHER:
case GL_POLYGON_OFFSET_FILL:
case GL_SAMPLE_ALPHA_TO_COVERAGE:
case GL_SAMPLE_COVERAGE:
case GL_SCISSOR_TEST:
case GL_STENCIL_TEST:
return true;
default:
SynthesizeGLError(GL_INVALID_ENUM, function_name, "invalid capability");
return false;
}
}
bool WebGLRenderingContextBase::ValidateUniformParameters(
const char* function_name,
const WebGLUniformLocation* location,
void* v,
GLsizei size,
GLsizei required_min_size,
GLuint src_offset,
GLuint src_length) {
return ValidateUniformMatrixParameters(function_name, location, false, v,
size, required_min_size, src_offset,
src_length);
}
bool WebGLRenderingContextBase::ValidateUniformMatrixParameters(
const char* function_name,
const WebGLUniformLocation* location,
GLboolean transpose,
DOMFloat32Array* v,
GLsizei required_min_size,
GLuint src_offset,
GLuint src_length) {
if (!v) {
SynthesizeGLError(GL_INVALID_VALUE, function_name, "no array");
return false;
}
return ValidateUniformMatrixParameters(
function_name, location, transpose, v->Data(), v->length(),
required_min_size, src_offset, src_length);
}
bool WebGLRenderingContextBase::ValidateUniformMatrixParameters(
const char* function_name,
const WebGLUniformLocation* location,
GLboolean transpose,
void* v,
GLsizei size,
GLsizei required_min_size,
GLuint src_offset,
GLuint src_length) {
DCHECK(size >= 0 && required_min_size > 0);
if (!location)
return false;
if (location->Program() != current_program_) {
SynthesizeGLError(GL_INVALID_OPERATION, function_name,
"location is not from current program");
return false;
}
if (!v) {
SynthesizeGLError(GL_INVALID_VALUE, function_name, "no array");
return false;
}
if (transpose && !IsWebGL2OrHigher()) {
SynthesizeGLError(GL_INVALID_VALUE, function_name, "transpose not FALSE");
return false;
}
if (src_offset >= static_cast<GLuint>(size)) {
SynthesizeGLError(GL_INVALID_VALUE, function_name, "invalid srcOffset");
return false;
}
GLsizei actual_size = size - src_offset;
if (src_length > 0) {
if (src_length > static_cast<GLuint>(actual_size)) {
SynthesizeGLError(GL_INVALID_VALUE, function_name,
"invalid srcOffset + srcLength");
return false;
}
actual_size = src_length;
}
if (actual_size < required_min_size || (actual_size % required_min_size)) {
SynthesizeGLError(GL_INVALID_VALUE, function_name, "invalid size");
return false;
}
return true;
}
WebGLBuffer* WebGLRenderingContextBase::ValidateBufferDataTarget(
const char* function_name,
GLenum target) {
WebGLBuffer* buffer = nullptr;
switch (target) {
case GL_ELEMENT_ARRAY_BUFFER:
buffer = bound_vertex_array_object_->BoundElementArrayBuffer();
break;
case GL_ARRAY_BUFFER:
buffer = bound_array_buffer_.Get();
break;
default:
SynthesizeGLError(GL_INVALID_ENUM, function_name, "invalid target");
return nullptr;
}
if (!buffer) {
SynthesizeGLError(GL_INVALID_OPERATION, function_name, "no buffer");
return nullptr;
}
return buffer;
}
bool WebGLRenderingContextBase::ValidateBufferDataUsage(
const char* function_name,
GLenum usage) {
switch (usage) {
case GL_STREAM_DRAW:
case GL_STATIC_DRAW:
case GL_DYNAMIC_DRAW:
return true;
default:
SynthesizeGLError(GL_INVALID_ENUM, function_name, "invalid usage");
return false;
}
}
void WebGLRenderingContextBase::RemoveBoundBuffer(WebGLBuffer* buffer) {
if (bound_array_buffer_ == buffer)
bound_array_buffer_ = nullptr;
bound_vertex_array_object_->UnbindBuffer(buffer);
}
bool WebGLRenderingContextBase::ValidateHTMLImageElement(
const char* function_name,
HTMLImageElement* image,
ExceptionState& exception_state) {
if (!image || !image->CachedImage()) {
SynthesizeGLError(GL_INVALID_VALUE, function_name, "no image");
return false;
}
const KURL& url = image->CachedImage()->GetResponse().Url();
if (url.IsNull() || url.IsEmpty() || !url.IsValid()) {
SynthesizeGLError(GL_INVALID_VALUE, function_name, "invalid image");
return false;
}
if (WouldTaintOrigin(image)) {
exception_state.ThrowSecurityError("The cross-origin image at " +
url.ElidedString() +
" may not be loaded.");
return false;
}
return true;
}
bool WebGLRenderingContextBase::ValidateHTMLCanvasElement(
const char* function_name,
HTMLCanvasElement* canvas,
ExceptionState& exception_state) {
if (!canvas || !canvas->IsPaintable()) {
SynthesizeGLError(GL_INVALID_VALUE, function_name, "no canvas");
return false;
}
if (WouldTaintOrigin(canvas)) {
exception_state.ThrowSecurityError("Tainted canvases may not be loaded.");
return false;
}
return true;
}
bool WebGLRenderingContextBase::ValidateHTMLVideoElement(
const char* function_name,
HTMLVideoElement* video,
ExceptionState& exception_state) {
if (!video || !video->videoWidth() || !video->videoHeight()) {
SynthesizeGLError(GL_INVALID_VALUE, function_name, "no video");
return false;
}
if (WouldTaintOrigin(video)) {
exception_state.ThrowSecurityError(
"The video element contains cross-origin data, and may not be loaded.");
return false;
}
return true;
}
bool WebGLRenderingContextBase::ValidateImageBitmap(
const char* function_name,
ImageBitmap* bitmap,
ExceptionState& exception_state) {
if (bitmap->IsNeutered()) {
SynthesizeGLError(GL_INVALID_VALUE, function_name,
"The source data has been detached.");
return false;
}
if (!bitmap->OriginClean()) {
exception_state.ThrowSecurityError(
"The ImageBitmap contains cross-origin data, and may not be loaded.");
return false;
}
return true;
}
bool WebGLRenderingContextBase::ValidateDrawArrays(const char* function_name) {
if (isContextLost())
return false;
if (!ValidateStencilSettings(function_name))
return false;
if (!ValidateRenderingState(function_name)) {
return false;
}
const char* reason = "framebuffer incomplete";
if (framebuffer_binding_ && framebuffer_binding_->CheckDepthStencilStatus(
&reason) != GL_FRAMEBUFFER_COMPLETE) {
SynthesizeGLError(GL_INVALID_FRAMEBUFFER_OPERATION, function_name, reason);
return false;
}
return true;
}
bool WebGLRenderingContextBase::ValidateDrawElements(const char* function_name,
GLenum type,
long long offset) {
if (isContextLost())
return false;
if (!ValidateStencilSettings(function_name))
return false;
if (type == GL_UNSIGNED_INT && !IsWebGL2OrHigher() &&
!ExtensionEnabled(kOESElementIndexUintName)) {
SynthesizeGLError(GL_INVALID_ENUM, function_name, "invalid type");
return false;
}
if (!ValidateValueFitNonNegInt32(function_name, "offset", offset))
return false;
if (!ValidateRenderingState(function_name)) {
return false;
}
const char* reason = "framebuffer incomplete";
if (framebuffer_binding_ && framebuffer_binding_->CheckDepthStencilStatus(
&reason) != GL_FRAMEBUFFER_COMPLETE) {
SynthesizeGLError(GL_INVALID_FRAMEBUFFER_OPERATION, function_name, reason);
return false;
}
return true;
}
void WebGLRenderingContextBase::DispatchContextLostEvent(TimerBase*) {
WebGLContextEvent* event = WebGLContextEvent::Create(
EventTypeNames::webglcontextlost, false, true, "");
if (offscreenCanvas())
offscreenCanvas()->DispatchEvent(event);
else
canvas()->DispatchEvent(event);
restore_allowed_ = event->defaultPrevented();
if (restore_allowed_ && !is_hidden_) {
if (auto_recovery_method_ == kAuto)
restore_timer_.StartOneShot(0, BLINK_FROM_HERE);
}
}
void WebGLRenderingContextBase::MaybeRestoreContext(TimerBase*) {
ASSERT(isContextLost());
// The rendering context is not restored unless the default behavior of the
// webglcontextlost event was prevented earlier.
//
// Because of the way m_restoreTimer is set up for real vs. synthetic lost
// context events, we don't have to worry about this test short-circuiting
// the retry loop for real context lost events.
if (!restore_allowed_)
return;
if (canvas()) {
LocalFrame* frame = canvas()->GetDocument().GetFrame();
if (!frame)
return;
Settings* settings = frame->GetSettings();
if (!frame->Loader().Client()->AllowWebGL(settings &&
settings->GetWebGLEnabled()))
return;
}
// If the context was lost due to RealLostContext, we need to destroy the old
// DrawingBuffer before creating new DrawingBuffer to ensure resource budget
// enough.
if (GetDrawingBuffer()) {
drawing_buffer_->BeginDestruction();
drawing_buffer_.Clear();
}
auto execution_context = canvas()
? canvas()->GetDocument().GetExecutionContext()
: offscreenCanvas()->GetExecutionContext();
Platform::ContextAttributes attributes = ToPlatformContextAttributes(
CreationAttributes(), Version(),
SupportOwnOffscreenSurface(execution_context));
Platform::GraphicsInfo gl_info;
std::unique_ptr<WebGraphicsContext3DProvider> context_provider;
const auto& url = canvas() ? canvas()->GetDocument().TopDocument().Url()
: offscreenCanvas()->GetExecutionContext()->Url();
if (IsMainThread()) {
context_provider = WTF::WrapUnique(
Platform::Current()->CreateOffscreenGraphicsContext3DProvider(
attributes, url, 0, &gl_info));
} else {
context_provider =
CreateContextProviderOnWorkerThread(attributes, &gl_info, url);
}
RefPtr<DrawingBuffer> buffer;
if (context_provider && context_provider->BindToCurrentThread()) {
// Construct a new drawing buffer with the new GL context.
if (canvas()) {
buffer = CreateDrawingBuffer(std::move(context_provider),
DrawingBuffer::kAllowChromiumImage);
} else {
// Please refer to comment at Line 1040 in this file.
buffer = CreateDrawingBuffer(std::move(context_provider),
DrawingBuffer::kDisallowChromiumImage);
}
// If DrawingBuffer::create() fails to allocate a fbo, |drawingBuffer| is
// set to null.
}
if (!buffer) {
if (context_lost_mode_ == kRealLostContext) {
restore_timer_.StartOneShot(kSecondsBetweenRestoreAttempts,
BLINK_FROM_HERE);
} else {
// This likely shouldn't happen but is the best way to report it to the
// WebGL app.
SynthesizeGLError(GL_INVALID_OPERATION, "", "error restoring context");
}
return;
}
drawing_buffer_ = buffer.Release();
drawing_buffer_->AddNewMailboxCallback(
WTF::Bind(&WebGLRenderingContextBase::NotifyCanvasContextChanged,
WrapWeakPersistent(this)));
GetDrawingBuffer()->Bind(GL_FRAMEBUFFER);
lost_context_errors_.Clear();
context_lost_mode_ = kNotLostContext;
auto_recovery_method_ = kManual;
restore_allowed_ = false;
RemoveFromEvictedList(this);
SetupFlags();
InitializeNewContext();
MarkContextChanged(kCanvasContextChanged);
WebGLContextEvent* event = WebGLContextEvent::Create(
EventTypeNames::webglcontextrestored, false, true, "");
if (canvas())
canvas()->DispatchEvent(event);
else
offscreenCanvas()->DispatchEvent(event);
}
String WebGLRenderingContextBase::EnsureNotNull(const String& text) const {
if (text.IsNull())
return WTF::g_empty_string;
return text;
}
WebGLRenderingContextBase::LRUImageBufferCache::LRUImageBufferCache(
int capacity)
: buffers_(WrapArrayUnique(new std::unique_ptr<ImageBuffer>[capacity])),
capacity_(capacity) {}
ImageBuffer* WebGLRenderingContextBase::LRUImageBufferCache::GetImageBuffer(
const IntSize& size) {
int i;
for (i = 0; i < capacity_; ++i) {
ImageBuffer* buf = buffers_[i].get();
if (!buf)
break;
if (buf->size() != size)
continue;
BubbleToFront(i);
return buf;
}
std::unique_ptr<ImageBuffer> temp(ImageBuffer::Create(size));
if (!temp)
return nullptr;
i = std::min(capacity_ - 1, i);
buffers_[i] = std::move(temp);
ImageBuffer* buf = buffers_[i].get();
BubbleToFront(i);
return buf;
}
void WebGLRenderingContextBase::LRUImageBufferCache::BubbleToFront(int idx) {
for (int i = idx; i > 0; --i)
buffers_[i].swap(buffers_[i - 1]);
}
namespace {
String GetErrorString(GLenum error) {
switch (error) {
case GL_INVALID_ENUM:
return "INVALID_ENUM";
case GL_INVALID_VALUE:
return "INVALID_VALUE";
case GL_INVALID_OPERATION:
return "INVALID_OPERATION";
case GL_OUT_OF_MEMORY:
return "OUT_OF_MEMORY";
case GL_INVALID_FRAMEBUFFER_OPERATION:
return "INVALID_FRAMEBUFFER_OPERATION";
case GC3D_CONTEXT_LOST_WEBGL:
return "CONTEXT_LOST_WEBGL";
default:
return String::Format("WebGL ERROR(0x%04X)", error);
}
}
} // namespace
void WebGLRenderingContextBase::SynthesizeGLError(
GLenum error,
const char* function_name,
const char* description,
ConsoleDisplayPreference display) {
String error_type = GetErrorString(error);
if (synthesized_errors_to_console_ && display == kDisplayInConsole) {
String message = String("WebGL: ") + error_type + ": " +
String(function_name) + ": " + String(description);
PrintGLErrorToConsole(message);
}
if (!isContextLost()) {
if (!synthetic_errors_.Contains(error))
synthetic_errors_.push_back(error);
} else {
if (!lost_context_errors_.Contains(error))
lost_context_errors_.push_back(error);
}
probe::didFireWebGLError(canvas(), error_type);
}
void WebGLRenderingContextBase::EmitGLWarning(const char* function_name,
const char* description) {
if (synthesized_errors_to_console_) {
String message =
String("WebGL: ") + String(function_name) + ": " + String(description);
PrintGLErrorToConsole(message);
}
probe::didFireWebGLWarning(canvas());
}
void WebGLRenderingContextBase::ApplyStencilTest() {
bool have_stencil_buffer = false;
if (framebuffer_binding_) {
have_stencil_buffer = framebuffer_binding_->HasStencilBuffer();
} else {
Nullable<WebGLContextAttributes> attributes;
getContextAttributes(attributes);
have_stencil_buffer = !attributes.IsNull() && attributes.Get().stencil();
}
EnableOrDisable(GL_STENCIL_TEST, stencil_enabled_ && have_stencil_buffer);
}
void WebGLRenderingContextBase::EnableOrDisable(GLenum capability,
bool enable) {
if (isContextLost())
return;
if (enable)
ContextGL()->Enable(capability);
else
ContextGL()->Disable(capability);
}
IntSize WebGLRenderingContextBase::ClampedCanvasSize() const {
int width, height;
if (canvas()) {
width = canvas()->width();
height = canvas()->height();
} else {
width = offscreenCanvas()->width();
height = offscreenCanvas()->height();
}
return IntSize(Clamp(width, 1, max_viewport_dims_[0]),
Clamp(height, 1, max_viewport_dims_[1]));
}
GLint WebGLRenderingContextBase::MaxDrawBuffers() {
if (isContextLost() ||
!(ExtensionEnabled(kWebGLDrawBuffersName) || IsWebGL2OrHigher()))
return 0;
if (!max_draw_buffers_)
ContextGL()->GetIntegerv(GL_MAX_DRAW_BUFFERS_EXT, &max_draw_buffers_);
if (!max_color_attachments_)
ContextGL()->GetIntegerv(GL_MAX_COLOR_ATTACHMENTS_EXT,
&max_color_attachments_);
// WEBGL_draw_buffers requires MAX_COLOR_ATTACHMENTS >= MAX_DRAW_BUFFERS.
return std::min(max_draw_buffers_, max_color_attachments_);
}
GLint WebGLRenderingContextBase::MaxColorAttachments() {
if (isContextLost() ||
!(ExtensionEnabled(kWebGLDrawBuffersName) || IsWebGL2OrHigher()))
return 0;
if (!max_color_attachments_)
ContextGL()->GetIntegerv(GL_MAX_COLOR_ATTACHMENTS_EXT,
&max_color_attachments_);
return max_color_attachments_;
}
void WebGLRenderingContextBase::SetBackDrawBuffer(GLenum buf) {
back_draw_buffer_ = buf;
}
void WebGLRenderingContextBase::SetFramebuffer(GLenum target,
WebGLFramebuffer* buffer) {
if (buffer)
buffer->SetHasEverBeenBound();
if (target == GL_FRAMEBUFFER || target == GL_DRAW_FRAMEBUFFER) {
framebuffer_binding_ = buffer;
ApplyStencilTest();
}
if (!buffer) {
// Instead of binding fb 0, bind the drawing buffer.
GetDrawingBuffer()->Bind(target);
} else {
ContextGL()->BindFramebuffer(target, buffer->Object());
}
}
void WebGLRenderingContextBase::RestoreCurrentFramebuffer() {
bindFramebuffer(GL_FRAMEBUFFER, framebuffer_binding_.Get());
}
void WebGLRenderingContextBase::RestoreCurrentTexture2D() {
bindTexture(GL_TEXTURE_2D,
texture_units_[active_texture_unit_].texture2d_binding_.Get());
}
void WebGLRenderingContextBase::FindNewMaxNonDefaultTextureUnit() {
// Trace backwards from the current max to find the new max non-default
// texture unit
int start_index = one_plus_max_non_default_texture_unit_ - 1;
for (int i = start_index; i >= 0; --i) {
if (texture_units_[i].texture2d_binding_ ||
texture_units_[i].texture_cube_map_binding_) {
one_plus_max_non_default_texture_unit_ = i + 1;
return;
}
}
one_plus_max_non_default_texture_unit_ = 0;
}
DEFINE_TRACE(WebGLRenderingContextBase::TextureUnitState) {
visitor->Trace(texture2d_binding_);
visitor->Trace(texture_cube_map_binding_);
visitor->Trace(texture3d_binding_);
visitor->Trace(texture2d_array_binding_);
}
DEFINE_TRACE(WebGLRenderingContextBase) {
visitor->Trace(context_group_);
visitor->Trace(bound_array_buffer_);
visitor->Trace(default_vertex_array_object_);
visitor->Trace(bound_vertex_array_object_);
visitor->Trace(current_program_);
visitor->Trace(framebuffer_binding_);
visitor->Trace(renderbuffer_binding_);
visitor->Trace(texture_units_);
visitor->Trace(extensions_);
CanvasRenderingContext::Trace(visitor);
}
DEFINE_TRACE_WRAPPERS(WebGLRenderingContextBase) {
visitor->TraceWrappers(context_group_);
visitor->TraceWrappers(bound_array_buffer_);
visitor->TraceWrappers(renderbuffer_binding_);
visitor->TraceWrappers(framebuffer_binding_);
visitor->TraceWrappers(current_program_);
visitor->TraceWrappers(bound_vertex_array_object_);
// Trace wrappers explicitly here since TextureUnitState is not a heap
// object, i.e., we cannot set its mark bits.
for (auto& unit : texture_units_) {
visitor->TraceWrappers(unit.texture2d_binding_);
visitor->TraceWrappers(unit.texture_cube_map_binding_);
visitor->TraceWrappers(unit.texture3d_binding_);
visitor->TraceWrappers(unit.texture2d_array_binding_);
}
for (ExtensionTracker* tracker : extensions_) {
visitor->TraceWrappers(tracker);
}
CanvasRenderingContext::TraceWrappers(visitor);
}
int WebGLRenderingContextBase::ExternallyAllocatedBytesPerPixel() {
if (isContextLost())
return 0;
int bytes_per_pixel = 4;
int total_bytes_per_pixel =
bytes_per_pixel * 2; // WebGL's front and back color buffers.
int samples = GetDrawingBuffer() ? GetDrawingBuffer()->SampleCount() : 0;
Nullable<WebGLContextAttributes> attribs;
getContextAttributes(attribs);
if (!attribs.IsNull()) {
// Handle memory from WebGL multisample and depth/stencil buffers.
// It is enabled only in case of explicit resolve assuming that there
// is no memory overhead for MSAA on tile-based GPU arch.
if (attribs.Get().antialias() && samples > 0 &&
GetDrawingBuffer()->ExplicitResolveOfMultisampleData()) {
if (attribs.Get().depth() || attribs.Get().stencil())
total_bytes_per_pixel +=
samples * bytes_per_pixel; // depth/stencil multisample buffer
total_bytes_per_pixel +=
samples * bytes_per_pixel; // color multisample buffer
} else if (attribs.Get().depth() || attribs.Get().stencil()) {
total_bytes_per_pixel += bytes_per_pixel; // regular depth/stencil buffer
}
}
return total_bytes_per_pixel;
}
DrawingBuffer* WebGLRenderingContextBase::GetDrawingBuffer() const {
return drawing_buffer_.Get();
}
void WebGLRenderingContextBase::ResetUnpackParameters() {
if (unpack_alignment_ != 1)
ContextGL()->PixelStorei(GL_UNPACK_ALIGNMENT, 1);
}
void WebGLRenderingContextBase::RestoreUnpackParameters() {
if (unpack_alignment_ != 1)
ContextGL()->PixelStorei(GL_UNPACK_ALIGNMENT, unpack_alignment_);
}
void WebGLRenderingContextBase::getHTMLOrOffscreenCanvas(
HTMLCanvasElementOrOffscreenCanvas& result) const {
if (canvas())
result.setHTMLCanvasElement(canvas());
else
result.setOffscreenCanvas(offscreenCanvas());
}
} // namespace blink