blob: 7e2ec0dbc36012f74076149ee2675b31a5f7727c [file] [log] [blame]
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "webkit/gpu/webgraphicscontext3d_in_process_impl.h"
#include <string.h>
#include <algorithm>
#include <string>
#include "base/lazy_instance.h"
#include "base/logging.h"
#include "base/string_split.h"
#include "base/memory/scoped_ptr.h"
#include "base/synchronization/lock.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebFrame.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebString.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebView.h"
#include "ui/gfx/gl/gl_bindings.h"
#include "ui/gfx/gl/gl_bindings_skia_in_process.h"
#include "ui/gfx/gl/gl_context.h"
#include "ui/gfx/gl/gl_implementation.h"
#include "ui/gfx/gl/gl_surface.h"
namespace webkit {
namespace gpu {
enum {
MAX_VERTEX_UNIFORM_VECTORS = 0x8DFB,
MAX_VARYING_VECTORS = 0x8DFC,
MAX_FRAGMENT_UNIFORM_VECTORS = 0x8DFD
};
struct WebGraphicsContext3DInProcessImpl::ShaderSourceEntry {
explicit ShaderSourceEntry(WGC3Denum shader_type)
: type(shader_type),
is_valid(false) {
}
WGC3Denum type;
scoped_array<char> source;
scoped_array<char> log;
scoped_array<char> translated_source;
bool is_valid;
};
WebGraphicsContext3DInProcessImpl::WebGraphicsContext3DInProcessImpl(
gfx::GLSurface* surface,
gfx::GLContext* context,
bool render_directly_to_web_view)
: initialized_(false),
render_directly_to_web_view_(render_directly_to_web_view),
is_gles2_(false),
have_ext_framebuffer_object_(false),
have_ext_framebuffer_multisample_(false),
have_angle_framebuffer_multisample_(false),
texture_(0),
fbo_(0),
depth_stencil_buffer_(0),
cached_width_(0),
cached_height_(0),
multisample_fbo_(0),
multisample_depth_stencil_buffer_(0),
multisample_color_buffer_(0),
bound_fbo_(0),
bound_texture_(0),
#ifdef FLIP_FRAMEBUFFER_VERTICALLY
scanline_(0),
#endif
gl_context_(context),
gl_surface_(surface),
fragment_compiler_(0),
vertex_compiler_(0) {
}
// All instances in a process that share resources are in the same share group.
static base::LazyInstance<
std::set<WebGraphicsContext3DInProcessImpl*> >
g_all_shared_contexts = LAZY_INSTANCE_INITIALIZER;
static base::LazyInstance<base::Lock>::Leaky
g_all_shared_contexts_lock = LAZY_INSTANCE_INITIALIZER;
WebGraphicsContext3DInProcessImpl::~WebGraphicsContext3DInProcessImpl() {
base::AutoLock a(g_all_shared_contexts_lock.Get());
g_all_shared_contexts.Pointer()->erase(this);
if (!initialized_)
return;
makeContextCurrent();
if (attributes_.antialias) {
glDeleteRenderbuffersEXT(1, &multisample_color_buffer_);
if (attributes_.depth || attributes_.stencil)
glDeleteRenderbuffersEXT(1, &multisample_depth_stencil_buffer_);
glDeleteFramebuffersEXT(1, &multisample_fbo_);
} else {
if (attributes_.depth || attributes_.stencil)
glDeleteRenderbuffersEXT(1, &depth_stencil_buffer_);
}
glDeleteTextures(1, &texture_);
#ifdef FLIP_FRAMEBUFFER_VERTICALLY
if (scanline_)
delete[] scanline_;
#endif
glDeleteFramebuffersEXT(1, &fbo_);
gl_context_->ReleaseCurrent(gl_surface_.get());
gl_context_->Destroy();
gl_surface_->Destroy();
for (ShaderSourceMap::iterator ii = shader_source_map_.begin();
ii != shader_source_map_.end(); ++ii) {
if (ii->second)
delete ii->second;
}
AngleDestroyCompilers();
}
WebGraphicsContext3DInProcessImpl*
WebGraphicsContext3DInProcessImpl::CreateForWebView(
WebGraphicsContext3D::Attributes attributes,
bool render_directly_to_web_view) {
if (!gfx::GLSurface::InitializeOneOff())
return NULL;
gfx::GLShareGroup* share_group = NULL;
if (attributes.shareResources) {
WebGraphicsContext3DInProcessImpl* context_impl =
g_all_shared_contexts.Pointer()->empty() ?
NULL : *g_all_shared_contexts.Pointer()->begin();
if (context_impl)
share_group = context_impl->gl_context_->share_group();
}
// This implementation always renders offscreen regardless of whether
// render_directly_to_web_view is true. Both DumpRenderTree and test_shell
// paint first to an intermediate offscreen buffer and from there to the
// window, and WebViewImpl::paint already correctly handles the case where the
// compositor is active but the output needs to go to a WebCanvas.
scoped_refptr<gfx::GLSurface> gl_surface =
gfx::GLSurface::CreateOffscreenGLSurface(false, gfx::Size(1, 1));
if (!gl_surface.get())
return NULL;
// TODO(kbr): This implementation doesn't yet support lost contexts
// and therefore can't yet properly support GPU switching.
gfx::GpuPreference gpu_preference = gfx::PreferDiscreteGpu;
scoped_refptr<gfx::GLContext> gl_context = gfx::GLContext::CreateGLContext(
share_group,
gl_surface.get(),
gpu_preference);
if (!gl_context.get())
return NULL;
scoped_ptr<WebGraphicsContext3DInProcessImpl> context(
new WebGraphicsContext3DInProcessImpl(
gl_surface.get(), gl_context.get(), render_directly_to_web_view));
if (!context->Initialize(attributes))
return NULL;
return context.release();
}
WebGraphicsContext3DInProcessImpl*
WebGraphicsContext3DInProcessImpl::CreateForWindow(
WebGraphicsContext3D::Attributes attributes,
gfx::AcceleratedWidget window,
gfx::GLShareGroup* share_group) {
if (!gfx::GLSurface::InitializeOneOff())
return NULL;
scoped_refptr<gfx::GLSurface> gl_surface =
gfx::GLSurface::CreateViewGLSurface(false, window);
if (!gl_surface.get())
return NULL;
gfx::GpuPreference gpu_preference = gfx::PreferDiscreteGpu;
scoped_refptr<gfx::GLContext> gl_context = gfx::GLContext::CreateGLContext(
share_group,
gl_surface.get(),
gpu_preference);
if (!gl_context.get())
return NULL;
scoped_ptr<WebGraphicsContext3DInProcessImpl> context(
new WebGraphicsContext3DInProcessImpl(
gl_surface.get(), gl_context.get(), true));
if (!context->Initialize(attributes))
return NULL;
return context.release();
}
bool WebGraphicsContext3DInProcessImpl::Initialize(
WebGraphicsContext3D::Attributes attributes) {
is_gles2_ = gfx::GetGLImplementation() == gfx::kGLImplementationEGLGLES2;
attributes_ = attributes;
// FIXME: for the moment we disable multisampling for the compositor.
// It actually works in this implementation, but there are a few
// considerations. First, we likely want to reduce the fuzziness in
// these tests as much as possible because we want to run pixel tests.
// Second, Mesa's multisampling doesn't seem to antialias straight
// edges in some CSS 3D samples. Third, we don't have multisampling
// support for the compositor in the normal case at the time of this
// writing.
if (render_directly_to_web_view_)
attributes_.antialias = false;
if (!gl_context_->MakeCurrent(gl_surface_.get())) {
gl_context_ = NULL;
return false;
}
const char* extensions =
reinterpret_cast<const char*>(glGetString(GL_EXTENSIONS));
DCHECK(extensions);
have_ext_framebuffer_object_ =
strstr(extensions, "GL_EXT_framebuffer_object") != NULL;
have_ext_framebuffer_multisample_ =
strstr(extensions, "GL_EXT_framebuffer_multisample") != NULL;
have_angle_framebuffer_multisample_ =
strstr(extensions, "GL_ANGLE_framebuffer_multisample") != NULL;
ValidateAttributes();
if (!is_gles2_) {
glEnable(GL_VERTEX_PROGRAM_POINT_SIZE);
glEnable(GL_POINT_SPRITE);
}
if (!AngleCreateCompilers()) {
AngleDestroyCompilers();
return false;
}
initialized_ = true;
gl_context_->ReleaseCurrent(gl_surface_.get());
if (attributes_.shareResources)
g_all_shared_contexts.Pointer()->insert(this);
return true;
}
void WebGraphicsContext3DInProcessImpl::ValidateAttributes() {
const char* extensions =
reinterpret_cast<const char*>(glGetString(GL_EXTENSIONS));
if (attributes_.stencil) {
if (strstr(extensions, "GL_OES_packed_depth_stencil") ||
strstr(extensions, "GL_EXT_packed_depth_stencil")) {
if (!attributes_.depth) {
attributes_.depth = true;
}
} else {
attributes_.stencil = false;
}
}
if (attributes_.antialias) {
bool isValidVendor = true;
#if defined(OS_MACOSX)
// Currently in Mac we only turn on antialias if vendor is NVIDIA.
const char* vendor = reinterpret_cast<const char*>(glGetString(GL_VENDOR));
if (!strstr(vendor, "NVIDIA"))
isValidVendor = false;
#endif
if (!(isValidVendor &&
(have_ext_framebuffer_multisample_ ||
(have_angle_framebuffer_multisample_ &&
strstr(extensions, "GL_OES_rgb8_rgba8")))))
attributes_.antialias = false;
// Don't antialias when using Mesa to ensure more reliable testing and
// because it doesn't appear to multisample straight lines correctly.
const char* renderer =
reinterpret_cast<const char*>(glGetString(GL_RENDERER));
if (!strncmp(renderer, "Mesa", 4)) {
attributes_.antialias = false;
}
}
}
void WebGraphicsContext3DInProcessImpl::ResolveMultisampledFramebuffer(
WGC3Dint x, WGC3Dint y, WGC3Dsizei width, WGC3Dsizei height) {
if (attributes_.antialias) {
glBindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, multisample_fbo_);
glBindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, fbo_);
if (have_ext_framebuffer_multisample_) {
glBlitFramebufferEXT(x, y,
x + width, y + height,
x, y,
x + width, y + height,
GL_COLOR_BUFFER_BIT, GL_NEAREST);
} else {
DCHECK(have_angle_framebuffer_multisample_);
glBlitFramebufferANGLE(x, y,
x + width, y + height,
x, y,
x + width, y + height,
GL_COLOR_BUFFER_BIT, GL_NEAREST);
}
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, bound_fbo_);
}
}
bool WebGraphicsContext3DInProcessImpl::makeContextCurrent() {
return gl_context_->MakeCurrent(gl_surface_.get());
}
int WebGraphicsContext3DInProcessImpl::width() {
return cached_width_;
}
int WebGraphicsContext3DInProcessImpl::height() {
return cached_height_;
}
bool WebGraphicsContext3DInProcessImpl::isGLES2Compliant() {
return is_gles2_;
}
bool WebGraphicsContext3DInProcessImpl::setParentContext(
WebGraphicsContext3D* parent_context) {
return false;
}
WebGLId WebGraphicsContext3DInProcessImpl::getPlatformTextureId() {
return texture_;
}
void WebGraphicsContext3DInProcessImpl::prepareTexture() {
if (!gl_surface_->IsOffscreen()) {
gl_surface_->SwapBuffers();
} else if (!render_directly_to_web_view_) {
// We need to prepare our rendering results for the compositor.
makeContextCurrent();
ResolveMultisampledFramebuffer(0, 0, cached_width_, cached_height_);
}
}
void WebGraphicsContext3DInProcessImpl::postSubBufferCHROMIUM(
int x, int y, int width, int height) {
DCHECK(gl_context_->HasExtension("GL_CHROMIUM_post_sub_buffer"));
gl_surface_->PostSubBuffer(x, y, width, height);
}
namespace {
int CreateTextureObject(GLenum target) {
GLuint texture = 0;
glGenTextures(1, &texture);
glBindTexture(target, texture);
glTexParameterf(target, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameterf(target, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
return texture;
}
} // anonymous namespace
void WebGraphicsContext3DInProcessImpl::reshape(int width, int height) {
cached_width_ = width;
cached_height_ = height;
makeContextCurrent();
bool must_restore_fbo = false;
if (gl_surface_->IsOffscreen())
must_restore_fbo = AllocateOffscreenFrameBuffer(width, height);
gl_surface_->Resize(gfx::Size(width, height));
ClearRenderTarget();
if (must_restore_fbo)
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, bound_fbo_);
#ifdef FLIP_FRAMEBUFFER_VERTICALLY
if (scanline_) {
delete[] scanline_;
scanline_ = 0;
}
scanline_ = new unsigned char[width * 4];
#endif // FLIP_FRAMEBUFFER_VERTICALLY
}
bool WebGraphicsContext3DInProcessImpl::AllocateOffscreenFrameBuffer(
int width, int height) {
GLenum target = GL_TEXTURE_2D;
if (!texture_) {
// Generate the texture object
texture_ = CreateTextureObject(target);
// Generate the framebuffer object
glGenFramebuffersEXT(1, &fbo_);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fbo_);
bound_fbo_ = fbo_;
if (attributes_.depth || attributes_.stencil)
glGenRenderbuffersEXT(1, &depth_stencil_buffer_);
// Generate the multisample framebuffer object
if (attributes_.antialias) {
glGenFramebuffersEXT(1, &multisample_fbo_);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, multisample_fbo_);
bound_fbo_ = multisample_fbo_;
glGenRenderbuffersEXT(1, &multisample_color_buffer_);
if (attributes_.depth || attributes_.stencil)
glGenRenderbuffersEXT(1, &multisample_depth_stencil_buffer_);
}
}
GLint internal_multisampled_color_format = 0;
GLint internal_color_format = 0;
GLint color_format = 0;
GLint internal_depth_stencil_format = 0;
if (attributes_.alpha) {
// GL_RGBA8_OES == GL_RGBA8
internal_multisampled_color_format = GL_RGBA8;
internal_color_format = is_gles2_ ? GL_RGBA : GL_RGBA8;
color_format = GL_RGBA;
} else {
// GL_RGB8_OES == GL_RGB8
internal_multisampled_color_format = GL_RGB8;
internal_color_format = is_gles2_ ? GL_RGB : GL_RGB8;
color_format = GL_RGB;
}
if (attributes_.stencil || attributes_.depth) {
// We don't allow the logic where stencil is required and depth is not.
// See GraphicsContext3DInternal constructor.
if (attributes_.stencil && attributes_.depth) {
internal_depth_stencil_format = GL_DEPTH24_STENCIL8_EXT;
} else {
if (is_gles2_)
internal_depth_stencil_format = GL_DEPTH_COMPONENT16;
else
internal_depth_stencil_format = GL_DEPTH_COMPONENT;
}
}
bool must_restore_fbo = false;
// Resize multisampling FBO
if (attributes_.antialias) {
GLint max_sample_count;
glGetIntegerv(GL_MAX_SAMPLES_EXT, &max_sample_count);
GLint sample_count = std::min(8, max_sample_count);
if (bound_fbo_ != multisample_fbo_) {
must_restore_fbo = true;
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, multisample_fbo_);
}
glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, multisample_color_buffer_);
if (have_ext_framebuffer_multisample_) {
glRenderbufferStorageMultisampleEXT(GL_RENDERBUFFER_EXT,
sample_count,
internal_multisampled_color_format,
width,
height);
} else {
DCHECK(have_angle_framebuffer_multisample_);
glRenderbufferStorageMultisampleANGLE(GL_RENDERBUFFER_EXT,
sample_count,
internal_multisampled_color_format,
width,
height);
}
glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT,
GL_COLOR_ATTACHMENT0_EXT,
GL_RENDERBUFFER_EXT,
multisample_color_buffer_);
if (attributes_.stencil || attributes_.depth) {
glBindRenderbufferEXT(GL_RENDERBUFFER_EXT,
multisample_depth_stencil_buffer_);
if (have_ext_framebuffer_multisample_) {
glRenderbufferStorageMultisampleEXT(GL_RENDERBUFFER_EXT,
sample_count,
internal_depth_stencil_format,
width,
height);
} else {
DCHECK(have_angle_framebuffer_multisample_);
glRenderbufferStorageMultisampleANGLE(GL_RENDERBUFFER_EXT,
sample_count,
internal_depth_stencil_format,
width,
height);
}
if (attributes_.stencil)
glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT,
GL_STENCIL_ATTACHMENT_EXT,
GL_RENDERBUFFER_EXT,
multisample_depth_stencil_buffer_);
if (attributes_.depth)
glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT,
GL_DEPTH_ATTACHMENT_EXT,
GL_RENDERBUFFER_EXT,
multisample_depth_stencil_buffer_);
}
glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, 0);
GLenum status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
LOG(ERROR) << "Multisampling framebuffer was incomplete";
// FIXME: cleanup.
NOTIMPLEMENTED();
}
}
// Resize regular FBO
if (bound_fbo_ != fbo_) {
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fbo_);
must_restore_fbo = true;
}
glBindTexture(target, texture_);
glTexImage2D(target, 0, internal_color_format,
width, height,
0, color_format, GL_UNSIGNED_BYTE, 0);
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,
GL_COLOR_ATTACHMENT0_EXT,
target,
texture_,
0);
glBindTexture(target, 0);
if (!attributes_.antialias && (attributes_.stencil || attributes_.depth)) {
glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, depth_stencil_buffer_);
glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT,
internal_depth_stencil_format,
width, height);
if (attributes_.stencil)
glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT,
GL_STENCIL_ATTACHMENT_EXT,
GL_RENDERBUFFER_EXT,
depth_stencil_buffer_);
if (attributes_.depth)
glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT,
GL_DEPTH_ATTACHMENT_EXT,
GL_RENDERBUFFER_EXT,
depth_stencil_buffer_);
glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, 0);
}
GLenum status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
LOG(ERROR) << "Framebuffer was incomplete";
// FIXME: cleanup.
NOTIMPLEMENTED();
}
if (attributes_.antialias) {
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, multisample_fbo_);
if (bound_fbo_ == multisample_fbo_)
must_restore_fbo = false;
}
return must_restore_fbo;
}
void WebGraphicsContext3DInProcessImpl::ClearRenderTarget() {
// Initialize renderbuffers to 0.
GLfloat clearColor[] = {0, 0, 0, 0}, clearDepth = 0;
GLint clearStencil = 0;
GLboolean colorMask[] = {GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE};
GLboolean depthMask = GL_TRUE;
GLuint stencilMask = 0xffffffff;
GLboolean isScissorEnabled = GL_FALSE;
GLboolean isDitherEnabled = GL_FALSE;
GLbitfield clearMask = GL_COLOR_BUFFER_BIT;
glGetFloatv(GL_COLOR_CLEAR_VALUE, clearColor);
glClearColor(0, 0, 0, 0);
glGetBooleanv(GL_COLOR_WRITEMASK, colorMask);
glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
if (attributes_.depth) {
glGetFloatv(GL_DEPTH_CLEAR_VALUE, &clearDepth);
glClearDepth(1);
glGetBooleanv(GL_DEPTH_WRITEMASK, &depthMask);
glDepthMask(GL_TRUE);
clearMask |= GL_DEPTH_BUFFER_BIT;
}
if (attributes_.stencil) {
glGetIntegerv(GL_STENCIL_CLEAR_VALUE, &clearStencil);
glClearStencil(0);
glGetIntegerv(GL_STENCIL_WRITEMASK,
reinterpret_cast<GLint*>(&stencilMask));
glStencilMaskSeparate(GL_FRONT, 0xffffffff);
clearMask |= GL_STENCIL_BUFFER_BIT;
}
isScissorEnabled = glIsEnabled(GL_SCISSOR_TEST);
glDisable(GL_SCISSOR_TEST);
isDitherEnabled = glIsEnabled(GL_DITHER);
glDisable(GL_DITHER);
glClear(clearMask);
glClearColor(clearColor[0], clearColor[1], clearColor[2], clearColor[3]);
glColorMask(colorMask[0], colorMask[1], colorMask[2], colorMask[3]);
if (attributes_.depth) {
glClearDepth(clearDepth);
glDepthMask(depthMask);
}
if (attributes_.stencil) {
glClearStencil(clearStencil);
glStencilMaskSeparate(GL_FRONT, stencilMask);
}
if (isScissorEnabled)
glEnable(GL_SCISSOR_TEST);
else
glDisable(GL_SCISSOR_TEST);
if (isDitherEnabled)
glEnable(GL_DITHER);
else
glDisable(GL_DITHER);
}
#ifdef FLIP_FRAMEBUFFER_VERTICALLY
void WebGraphicsContext3DInProcessImpl::FlipVertically(
unsigned char* framebuffer, unsigned int width, unsigned int height) {
unsigned char* scanline = scanline_;
if (!scanline)
return;
unsigned int row_bytes = width * 4;
unsigned int count = height / 2;
for (unsigned int i = 0; i < count; i++) {
unsigned char* row_a = framebuffer + i * row_bytes;
unsigned char* row_b = framebuffer + (height - i - 1) * row_bytes;
// FIXME: this is where the multiplication of the alpha
// channel into the color buffer will need to occur if the
// user specifies the "premultiplyAlpha" flag in the context
// creation attributes.
memcpy(scanline, row_b, row_bytes);
memcpy(row_b, row_a, row_bytes);
memcpy(row_a, scanline, row_bytes);
}
}
#endif
bool WebGraphicsContext3DInProcessImpl::readBackFramebuffer(
unsigned char* pixels, size_t bufferSize, WebGLId framebuffer,
int width, int height) {
if (bufferSize != static_cast<size_t>(4 * width * height))
return false;
makeContextCurrent();
// Earlier versions of this code used the GPU to flip the
// framebuffer vertically before reading it back for compositing
// via software. This code was quite complicated, used a lot of
// GPU memory, and didn't provide an obvious speedup. Since this
// vertical flip is only a temporary solution anyway until Chrome
// is fully GPU composited, it wasn't worth the complexity.
// In this implementation fbo_, not 0, is the drawing buffer, so
// special-case that.
if (framebuffer == 0)
framebuffer = fbo_;
if (framebuffer == fbo_)
ResolveMultisampledFramebuffer(0, 0, width, height);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, framebuffer);
GLint pack_alignment = 4;
bool must_restore_pack_alignment = false;
glGetIntegerv(GL_PACK_ALIGNMENT, &pack_alignment);
if (pack_alignment > 4) {
glPixelStorei(GL_PACK_ALIGNMENT, 4);
must_restore_pack_alignment = true;
}
if (is_gles2_) {
// FIXME: consider testing for presence of GL_OES_read_format
// and GL_EXT_read_format_bgra, and using GL_BGRA_EXT here
// directly.
glReadPixels(0, 0, width, height,
GL_RGBA, GL_UNSIGNED_BYTE, pixels);
for (size_t i = 0; i < bufferSize; i += 4) {
std::swap(pixels[i], pixels[i + 2]);
}
} else {
glReadPixels(0, 0, width, height,
GL_BGRA, GL_UNSIGNED_BYTE, pixels);
}
if (must_restore_pack_alignment)
glPixelStorei(GL_PACK_ALIGNMENT, pack_alignment);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, bound_fbo_);
#ifdef FLIP_FRAMEBUFFER_VERTICALLY
if (pixels)
FlipVertically(pixels, width, height);
#endif
return true;
}
bool WebGraphicsContext3DInProcessImpl::readBackFramebuffer(
unsigned char* pixels, size_t bufferSize) {
return readBackFramebuffer(pixels, bufferSize, fbo_, width(), height());
}
void WebGraphicsContext3DInProcessImpl::synthesizeGLError(WGC3Denum error) {
if (synthetic_errors_set_.find(error) == synthetic_errors_set_.end()) {
synthetic_errors_set_.insert(error);
synthetic_errors_list_.push_back(error);
}
}
void* WebGraphicsContext3DInProcessImpl::mapBufferSubDataCHROMIUM(
WGC3Denum target, WGC3Dintptr offset,
WGC3Dsizeiptr size, WGC3Denum access) {
return 0;
}
void WebGraphicsContext3DInProcessImpl::unmapBufferSubDataCHROMIUM(
const void* mem) {
}
void* WebGraphicsContext3DInProcessImpl::mapTexSubImage2DCHROMIUM(
WGC3Denum target, WGC3Dint level, WGC3Dint xoffset, WGC3Dint yoffset,
WGC3Dsizei width, WGC3Dsizei height, WGC3Denum format, WGC3Denum type,
WGC3Denum access) {
return 0;
}
void WebGraphicsContext3DInProcessImpl::unmapTexSubImage2DCHROMIUM(
const void* mem) {
}
void WebGraphicsContext3DInProcessImpl::setVisibilityCHROMIUM(bool visible) {
}
void WebGraphicsContext3DInProcessImpl::
setMemoryAllocationChangedCallbackCHROMIUM(
WebGraphicsMemoryAllocationChangedCallbackCHROMIUM* callback) {
}
void WebGraphicsContext3DInProcessImpl::discardFramebufferEXT(
WGC3Denum target, WGC3Dsizei numAttachments, const WGC3Denum* attachments) {
}
void WebGraphicsContext3DInProcessImpl::ensureFramebufferCHROMIUM() {
}
void WebGraphicsContext3DInProcessImpl::copyTextureToParentTextureCHROMIUM(
WebGLId id, WebGLId id2) {
NOTIMPLEMENTED();
}
WebString WebGraphicsContext3DInProcessImpl::
getRequestableExtensionsCHROMIUM() {
return WebString();
}
void WebGraphicsContext3DInProcessImpl::requestExtensionCHROMIUM(const char*) {
}
void WebGraphicsContext3DInProcessImpl::blitFramebufferCHROMIUM(
WGC3Dint srcX0, WGC3Dint srcY0, WGC3Dint srcX1, WGC3Dint srcY1,
WGC3Dint dstX0, WGC3Dint dstY0, WGC3Dint dstX1, WGC3Dint dstY1,
WGC3Dbitfield mask, WGC3Denum filter) {
}
void WebGraphicsContext3DInProcessImpl::renderbufferStorageMultisampleCHROMIUM(
WGC3Denum target, WGC3Dsizei samples, WGC3Denum internalformat,
WGC3Dsizei width, WGC3Dsizei height) {
}
// Helper macros to reduce the amount of code.
#define DELEGATE_TO_GL(name, glname) \
void WebGraphicsContext3DInProcessImpl::name() { \
makeContextCurrent(); \
gl##glname(); \
}
#define DELEGATE_TO_GL_1(name, glname, t1) \
void WebGraphicsContext3DInProcessImpl::name(t1 a1) { \
makeContextCurrent(); \
gl##glname(a1); \
}
#define DELEGATE_TO_GL_1R(name, glname, t1, rt) \
rt WebGraphicsContext3DInProcessImpl::name(t1 a1) { \
makeContextCurrent(); \
return gl##glname(a1); \
}
#define DELEGATE_TO_GL_1RB(name, glname, t1, rt) \
rt WebGraphicsContext3DInProcessImpl::name(t1 a1) { \
makeContextCurrent(); \
return gl##glname(a1) ? true : false; \
}
#define DELEGATE_TO_GL_2(name, glname, t1, t2) \
void WebGraphicsContext3DInProcessImpl::name(t1 a1, t2 a2) { \
makeContextCurrent(); \
gl##glname(a1, a2); \
}
#define DELEGATE_TO_GL_2R(name, glname, t1, t2, rt) \
rt WebGraphicsContext3DInProcessImpl::name(t1 a1, t2 a2) { \
makeContextCurrent(); \
return gl##glname(a1, a2); \
}
#define DELEGATE_TO_GL_3(name, glname, t1, t2, t3) \
void WebGraphicsContext3DInProcessImpl::name(t1 a1, t2 a2, t3 a3) { \
makeContextCurrent(); \
gl##glname(a1, a2, a3); \
}
#define DELEGATE_TO_GL_4(name, glname, t1, t2, t3, t4) \
void WebGraphicsContext3DInProcessImpl::name(t1 a1, t2 a2, t3 a3, t4 a4) { \
makeContextCurrent(); \
gl##glname(a1, a2, a3, a4); \
}
#define DELEGATE_TO_GL_5(name, glname, t1, t2, t3, t4, t5) \
void WebGraphicsContext3DInProcessImpl::name(t1 a1, t2 a2, t3 a3, t4 a4, \
t5 a5) { \
makeContextCurrent(); \
gl##glname(a1, a2, a3, a4, a5); \
}
#define DELEGATE_TO_GL_6(name, glname, t1, t2, t3, t4, t5, t6) \
void WebGraphicsContext3DInProcessImpl::name(t1 a1, t2 a2, t3 a3, t4 a4, \
t5 a5, t6 a6) { \
makeContextCurrent(); \
gl##glname(a1, a2, a3, a4, a5, a6); \
}
#define DELEGATE_TO_GL_7(name, glname, t1, t2, t3, t4, t5, t6, t7) \
void WebGraphicsContext3DInProcessImpl::name(t1 a1, t2 a2, t3 a3, t4 a4, \
t5 a5, t6 a6, t7 a7) { \
makeContextCurrent(); \
gl##glname(a1, a2, a3, a4, a5, a6, a7); \
}
#define DELEGATE_TO_GL_8(name, glname, t1, t2, t3, t4, t5, t6, t7, t8) \
void WebGraphicsContext3DInProcessImpl::name(t1 a1, t2 a2, t3 a3, t4 a4, \
t5 a5, t6 a6, t7 a7, t8 a8) { \
makeContextCurrent(); \
gl##glname(a1, a2, a3, a4, a5, a6, a7, a8); \
}
#define DELEGATE_TO_GL_9(name, glname, t1, t2, t3, t4, t5, t6, t7, t8, t9) \
void WebGraphicsContext3DInProcessImpl::name(t1 a1, t2 a2, t3 a3, t4 a4, \
t5 a5, t6 a6, t7 a7, t8 a8, \
t9 a9) { \
makeContextCurrent(); \
gl##glname(a1, a2, a3, a4, a5, a6, a7, a8, a9); \
}
void WebGraphicsContext3DInProcessImpl::activeTexture(WGC3Denum texture) {
// FIXME: query number of textures available.
if (texture < GL_TEXTURE0 || texture > GL_TEXTURE0+32)
// FIXME: raise exception.
return;
makeContextCurrent();
glActiveTexture(texture);
}
DELEGATE_TO_GL_2(attachShader, AttachShader, WebGLId, WebGLId)
DELEGATE_TO_GL_3(bindAttribLocation, BindAttribLocation,
WebGLId, WGC3Duint, const WGC3Dchar*)
DELEGATE_TO_GL_2(bindBuffer, BindBuffer, WGC3Denum, WebGLId);
void WebGraphicsContext3DInProcessImpl::bindFramebuffer(
WGC3Denum target, WebGLId framebuffer) {
makeContextCurrent();
if (!framebuffer)
framebuffer = (attributes_.antialias ? multisample_fbo_ : fbo_);
if (framebuffer != bound_fbo_) {
glBindFramebufferEXT(target, framebuffer);
bound_fbo_ = framebuffer;
}
}
DELEGATE_TO_GL_2(bindRenderbuffer, BindRenderbufferEXT, WGC3Denum, WebGLId)
void WebGraphicsContext3DInProcessImpl::bindTexture(
WGC3Denum target, WebGLId texture) {
makeContextCurrent();
glBindTexture(target, texture);
bound_texture_ = texture;
}
DELEGATE_TO_GL_4(blendColor, BlendColor,
WGC3Dfloat, WGC3Dfloat, WGC3Dfloat, WGC3Dfloat)
DELEGATE_TO_GL_1(blendEquation, BlendEquation, WGC3Denum)
DELEGATE_TO_GL_2(blendEquationSeparate, BlendEquationSeparate,
WGC3Denum, WGC3Denum)
DELEGATE_TO_GL_2(blendFunc, BlendFunc, WGC3Denum, WGC3Denum)
DELEGATE_TO_GL_4(blendFuncSeparate, BlendFuncSeparate,
WGC3Denum, WGC3Denum, WGC3Denum, WGC3Denum)
DELEGATE_TO_GL_4(bufferData, BufferData,
WGC3Denum, WGC3Dsizeiptr, const void*, WGC3Denum)
DELEGATE_TO_GL_4(bufferSubData, BufferSubData,
WGC3Denum, WGC3Dintptr, WGC3Dsizeiptr, const void*)
DELEGATE_TO_GL_1R(checkFramebufferStatus, CheckFramebufferStatusEXT,
WGC3Denum, WGC3Denum)
DELEGATE_TO_GL_1(clear, Clear, WGC3Dbitfield)
DELEGATE_TO_GL_4(clearColor, ClearColor,
WGC3Dclampf, WGC3Dclampf, WGC3Dclampf, WGC3Dclampf)
DELEGATE_TO_GL_1(clearDepth, ClearDepth, WGC3Dclampf)
DELEGATE_TO_GL_1(clearStencil, ClearStencil, WGC3Dint)
DELEGATE_TO_GL_4(colorMask, ColorMask,
WGC3Dboolean, WGC3Dboolean, WGC3Dboolean, WGC3Dboolean)
void WebGraphicsContext3DInProcessImpl::compileShader(WebGLId shader) {
makeContextCurrent();
ShaderSourceMap::iterator result = shader_source_map_.find(shader);
if (result == shader_source_map_.end()) {
// Passing down to gl driver to generate the correct error; or the case
// where the shader deletion is delayed when it's attached to a program.
glCompileShader(shader);
return;
}
ShaderSourceEntry* entry = result->second;
DCHECK(entry);
if (!AngleValidateShaderSource(entry)) {
// Shader didn't validate; don't move forward with compiling
// translated source.
return;
}
const char* translated_source = entry->translated_source.get();
int shader_length = translated_source ? strlen(translated_source) : 0;
glShaderSource(
shader, 1, const_cast<const char**>(&translated_source), &shader_length);
glCompileShader(shader);
#ifndef NDEBUG
int compileStatus;
glGetShaderiv(shader, GL_COMPILE_STATUS, &compileStatus);
// DCHECK that ANGLE generated GLSL will be accepted by OpenGL
DCHECK(compileStatus == GL_TRUE);
#endif
}
DELEGATE_TO_GL_8(compressedTexImage2D, CompressedTexImage2D,
WGC3Denum, WGC3Dint, WGC3Denum, WGC3Dint, WGC3Dint,
WGC3Dsizei, WGC3Dsizei, const void*)
DELEGATE_TO_GL_9(compressedTexSubImage2D, CompressedTexSubImage2D,
WGC3Denum, WGC3Dint, WGC3Dint, WGC3Dint, WGC3Dint, WGC3Dint,
WGC3Denum, WGC3Dsizei, const void*)
void WebGraphicsContext3DInProcessImpl::copyTexImage2D(
WGC3Denum target, WGC3Dint level, WGC3Denum internalformat, WGC3Dint x,
WGC3Dint y, WGC3Dsizei width, WGC3Dsizei height, WGC3Dint border) {
makeContextCurrent();
bool needsResolve = (attributes_.antialias && bound_fbo_ == multisample_fbo_);
if (needsResolve) {
ResolveMultisampledFramebuffer(x, y, width, height);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fbo_);
}
glCopyTexImage2D(target, level, internalformat, x, y, width, height, border);
if (needsResolve)
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, bound_fbo_);
}
void WebGraphicsContext3DInProcessImpl::copyTexSubImage2D(
WGC3Denum target, WGC3Dint level, WGC3Dint xoffset, WGC3Dint yoffset,
WGC3Dint x, WGC3Dint y, WGC3Dsizei width, WGC3Dsizei height) {
makeContextCurrent();
bool needsResolve = (attributes_.antialias && bound_fbo_ == multisample_fbo_);
if (needsResolve) {
ResolveMultisampledFramebuffer(x, y, width, height);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fbo_);
}
glCopyTexSubImage2D(target, level, xoffset, yoffset, x, y, width, height);
if (needsResolve)
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, bound_fbo_);
}
DELEGATE_TO_GL_1(cullFace, CullFace, WGC3Denum)
DELEGATE_TO_GL_1(depthFunc, DepthFunc, WGC3Denum)
DELEGATE_TO_GL_1(depthMask, DepthMask, WGC3Dboolean)
DELEGATE_TO_GL_2(depthRange, DepthRange, WGC3Dclampf, WGC3Dclampf)
DELEGATE_TO_GL_2(detachShader, DetachShader, WebGLId, WebGLId)
DELEGATE_TO_GL_1(disable, Disable, WGC3Denum)
DELEGATE_TO_GL_1(disableVertexAttribArray, DisableVertexAttribArray, WGC3Duint)
DELEGATE_TO_GL_3(drawArrays, DrawArrays, WGC3Denum, WGC3Dint, WGC3Dsizei)
void WebGraphicsContext3DInProcessImpl::drawElements(
WGC3Denum mode, WGC3Dsizei count, WGC3Denum type, WGC3Dintptr offset) {
makeContextCurrent();
glDrawElements(mode, count, type,
reinterpret_cast<void*>(static_cast<intptr_t>(offset)));
}
DELEGATE_TO_GL_1(enable, Enable, WGC3Denum)
DELEGATE_TO_GL_1(enableVertexAttribArray, EnableVertexAttribArray, WGC3Duint)
DELEGATE_TO_GL(finish, Finish)
DELEGATE_TO_GL(flush, Flush)
DELEGATE_TO_GL_4(framebufferRenderbuffer, FramebufferRenderbufferEXT,
WGC3Denum, WGC3Denum, WGC3Denum, WebGLId)
DELEGATE_TO_GL_5(framebufferTexture2D, FramebufferTexture2DEXT,
WGC3Denum, WGC3Denum, WGC3Denum, WebGLId, WGC3Dint)
DELEGATE_TO_GL_1(frontFace, FrontFace, WGC3Denum)
void WebGraphicsContext3DInProcessImpl::generateMipmap(WGC3Denum target) {
makeContextCurrent();
if (is_gles2_ || have_ext_framebuffer_object_)
glGenerateMipmapEXT(target);
// FIXME: provide alternative code path? This will be unpleasant
// to implement if glGenerateMipmapEXT is not available -- it will
// require a texture readback and re-upload.
}
bool WebGraphicsContext3DInProcessImpl::getActiveAttrib(
WebGLId program, WGC3Duint index, ActiveInfo& info) {
makeContextCurrent();
if (!program) {
synthesizeGLError(GL_INVALID_VALUE);
return false;
}
GLint max_name_length = -1;
glGetProgramiv(program, GL_ACTIVE_ATTRIBUTE_MAX_LENGTH, &max_name_length);
if (max_name_length < 0)
return false;
scoped_array<GLchar> name(new GLchar[max_name_length]);
GLsizei length = 0;
GLint size = -1;
GLenum type = 0;
glGetActiveAttrib(program, index, max_name_length,
&length, &size, &type, name.get());
if (size < 0) {
return false;
}
info.name = WebString::fromUTF8(name.get(), length);
info.type = type;
info.size = size;
return true;
}
bool WebGraphicsContext3DInProcessImpl::getActiveUniform(
WebGLId program, WGC3Duint index, ActiveInfo& info) {
makeContextCurrent();
GLint max_name_length = -1;
glGetProgramiv(program, GL_ACTIVE_UNIFORM_MAX_LENGTH, &max_name_length);
if (max_name_length < 0)
return false;
scoped_array<GLchar> name(new GLchar[max_name_length]);
GLsizei length = 0;
GLint size = -1;
GLenum type = 0;
glGetActiveUniform(program, index, max_name_length,
&length, &size, &type, name.get());
if (size < 0) {
return false;
}
info.name = WebString::fromUTF8(name.get(), length);
info.type = type;
info.size = size;
return true;
}
DELEGATE_TO_GL_4(getAttachedShaders, GetAttachedShaders,
WebGLId, WGC3Dsizei, WGC3Dsizei*, WebGLId*)
DELEGATE_TO_GL_2R(getAttribLocation, GetAttribLocation,
WebGLId, const WGC3Dchar*, WGC3Dint)
DELEGATE_TO_GL_2(getBooleanv, GetBooleanv,
WGC3Denum, WGC3Dboolean*)
DELEGATE_TO_GL_3(getBufferParameteriv, GetBufferParameteriv,
WGC3Denum, WGC3Denum, WGC3Dint*)
WebGraphicsContext3D::Attributes WebGraphicsContext3DInProcessImpl::
getContextAttributes() {
return attributes_;
}
WGC3Denum WebGraphicsContext3DInProcessImpl::getError() {
DCHECK(synthetic_errors_list_.size() == synthetic_errors_set_.size());
if (!synthetic_errors_set_.empty()) {
WGC3Denum error = synthetic_errors_list_.front();
synthetic_errors_list_.pop_front();
synthetic_errors_set_.erase(error);
return error;
}
makeContextCurrent();
return glGetError();
}
bool WebGraphicsContext3DInProcessImpl::isContextLost() {
return false;
}
DELEGATE_TO_GL_2(getFloatv, GetFloatv, WGC3Denum, WGC3Dfloat*)
void WebGraphicsContext3DInProcessImpl::getFramebufferAttachmentParameteriv(
WGC3Denum target, WGC3Denum attachment,
WGC3Denum pname, WGC3Dint* value) {
makeContextCurrent();
if (attachment == GL_DEPTH_STENCIL_ATTACHMENT)
attachment = GL_DEPTH_ATTACHMENT; // Or GL_STENCIL_ATTACHMENT;
// either works.
glGetFramebufferAttachmentParameterivEXT(target, attachment, pname, value);
}
void WebGraphicsContext3DInProcessImpl::getIntegerv(
WGC3Denum pname, WGC3Dint* value) {
makeContextCurrent();
if (is_gles2_) {
glGetIntegerv(pname, value);
return;
}
// Need to emulate MAX_FRAGMENT/VERTEX_UNIFORM_VECTORS and
// MAX_VARYING_VECTORS because desktop GL's corresponding queries
// return the number of components whereas GLES2 return the number
// of vectors (each vector has 4 components). Therefore, the value
// returned by desktop GL needs to be divided by 4.
switch (pname) {
case MAX_FRAGMENT_UNIFORM_VECTORS:
glGetIntegerv(GL_MAX_FRAGMENT_UNIFORM_COMPONENTS, value);
*value /= 4;
break;
case MAX_VERTEX_UNIFORM_VECTORS:
glGetIntegerv(GL_MAX_VERTEX_UNIFORM_COMPONENTS, value);
*value /= 4;
break;
case MAX_VARYING_VECTORS:
glGetIntegerv(GL_MAX_VARYING_FLOATS, value);
*value /= 4;
break;
default:
glGetIntegerv(pname, value);
}
}
DELEGATE_TO_GL_3(getProgramiv, GetProgramiv, WebGLId, WGC3Denum, WGC3Dint*)
WebString WebGraphicsContext3DInProcessImpl::getProgramInfoLog(
WebGLId program) {
makeContextCurrent();
GLint log_length;
glGetProgramiv(program, GL_INFO_LOG_LENGTH, &log_length);
if (!log_length)
return WebString();
scoped_array<GLchar> log(new GLchar[log_length]);
GLsizei returned_log_length;
glGetProgramInfoLog(program, log_length, &returned_log_length, log.get());
DCHECK(log_length == returned_log_length + 1);
WebString res = WebString::fromUTF8(log.get(), returned_log_length);
return res;
}
DELEGATE_TO_GL_3(getRenderbufferParameteriv, GetRenderbufferParameterivEXT,
WGC3Denum, WGC3Denum, WGC3Dint*)
void WebGraphicsContext3DInProcessImpl::getShaderiv(
WebGLId shader, WGC3Denum pname, WGC3Dint* value) {
makeContextCurrent();
ShaderSourceMap::iterator result = shader_source_map_.find(shader);
if (result != shader_source_map_.end()) {
ShaderSourceEntry* entry = result->second;
DCHECK(entry);
switch (pname) {
case GL_COMPILE_STATUS:
if (!entry->is_valid) {
*value = 0;
return;
}
break;
case GL_INFO_LOG_LENGTH:
if (!entry->is_valid) {
*value = entry->log.get() ? strlen(entry->log.get()) : 0;
if (*value)
(*value)++;
return;
}
break;
case GL_SHADER_SOURCE_LENGTH:
*value = entry->source.get() ? strlen(entry->source.get()) : 0;
if (*value)
(*value)++;
return;
}
}
glGetShaderiv(shader, pname, value);
}
DELEGATE_TO_GL_4(getShaderPrecisionFormat, GetShaderPrecisionFormat,
WGC3Denum, WGC3Denum, WGC3Dint*, WGC3Dint*)
WebString WebGraphicsContext3DInProcessImpl::getShaderInfoLog(WebGLId shader) {
makeContextCurrent();
ShaderSourceMap::iterator result = shader_source_map_.find(shader);
if (result != shader_source_map_.end()) {
ShaderSourceEntry* entry = result->second;
DCHECK(entry);
if (!entry->is_valid) {
if (!entry->log.get())
return WebString();
WebString res = WebString::fromUTF8(
entry->log.get(), strlen(entry->log.get()));
return res;
}
}
GLint log_length = 0;
glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &log_length);
if (log_length <= 1)
return WebString();
scoped_array<GLchar> log(new GLchar[log_length]);
GLsizei returned_log_length;
glGetShaderInfoLog(shader, log_length, &returned_log_length, log.get());
DCHECK(log_length == returned_log_length + 1);
WebString res = WebString::fromUTF8(log.get(), returned_log_length);
return res;
}
WebString WebGraphicsContext3DInProcessImpl::getShaderSource(WebGLId shader) {
makeContextCurrent();
ShaderSourceMap::iterator result = shader_source_map_.find(shader);
if (result != shader_source_map_.end()) {
ShaderSourceEntry* entry = result->second;
DCHECK(entry);
if (!entry->source.get())
return WebString();
WebString res = WebString::fromUTF8(
entry->source.get(), strlen(entry->source.get()));
return res;
}
GLint log_length = 0;
glGetShaderiv(shader, GL_SHADER_SOURCE_LENGTH, &log_length);
if (log_length <= 1)
return WebString();
scoped_array<GLchar> log(new GLchar[log_length]);
GLsizei returned_log_length;
glGetShaderSource(shader, log_length, &returned_log_length, log.get());
DCHECK(log_length == returned_log_length + 1);
WebString res = WebString::fromUTF8(log.get(), returned_log_length);
return res;
}
WebString WebGraphicsContext3DInProcessImpl::getString(WGC3Denum name) {
makeContextCurrent();
std::string result;
if (name == GL_EXTENSIONS) {
result = gl_context_->GetExtensions();
if (!is_gles2_) {
std::vector<std::string> split;
base::SplitString(result, ' ', &split);
if (std::find(split.begin(), split.end(), "GL_EXT_bgra") != split.end()) {
// If we support GL_EXT_bgra, pretend we support a couple of GLES2
// extension that are a subset of it.
result += " GL_EXT_texture_format_BGRA8888 GL_EXT_read_format_bgra";
}
}
} else {
result = reinterpret_cast<const char*>(glGetString(name));
}
return WebString::fromUTF8(result.c_str());
}
DELEGATE_TO_GL_3(getTexParameterfv, GetTexParameterfv,
WGC3Denum, WGC3Denum, WGC3Dfloat*)
DELEGATE_TO_GL_3(getTexParameteriv, GetTexParameteriv,
WGC3Denum, WGC3Denum, WGC3Dint*)
DELEGATE_TO_GL_3(getUniformfv, GetUniformfv, WebGLId, WGC3Dint, WGC3Dfloat*)
DELEGATE_TO_GL_3(getUniformiv, GetUniformiv, WebGLId, WGC3Dint, WGC3Dint*)
DELEGATE_TO_GL_2R(getUniformLocation, GetUniformLocation,
WebGLId, const WGC3Dchar*, WGC3Dint)
DELEGATE_TO_GL_3(getVertexAttribfv, GetVertexAttribfv,
WGC3Duint, WGC3Denum, WGC3Dfloat*)
DELEGATE_TO_GL_3(getVertexAttribiv, GetVertexAttribiv,
WGC3Duint, WGC3Denum, WGC3Dint*)
WGC3Dsizeiptr WebGraphicsContext3DInProcessImpl::getVertexAttribOffset(
WGC3Duint index, WGC3Denum pname) {
makeContextCurrent();
void* pointer;
glGetVertexAttribPointerv(index, pname, &pointer);
return static_cast<WGC3Dsizeiptr>(reinterpret_cast<intptr_t>(pointer));
}
DELEGATE_TO_GL_2(hint, Hint, WGC3Denum, WGC3Denum)
DELEGATE_TO_GL_1RB(isBuffer, IsBuffer, WebGLId, WGC3Dboolean)
DELEGATE_TO_GL_1RB(isEnabled, IsEnabled, WGC3Denum, WGC3Dboolean)
DELEGATE_TO_GL_1RB(isFramebuffer, IsFramebufferEXT, WebGLId, WGC3Dboolean)
DELEGATE_TO_GL_1RB(isProgram, IsProgram, WebGLId, WGC3Dboolean)
DELEGATE_TO_GL_1RB(isRenderbuffer, IsRenderbufferEXT, WebGLId, WGC3Dboolean)
DELEGATE_TO_GL_1RB(isShader, IsShader, WebGLId, WGC3Dboolean)
DELEGATE_TO_GL_1RB(isTexture, IsTexture, WebGLId, WGC3Dboolean)
DELEGATE_TO_GL_1(lineWidth, LineWidth, WGC3Dfloat)
DELEGATE_TO_GL_1(linkProgram, LinkProgram, WebGLId)
DELEGATE_TO_GL_2(pixelStorei, PixelStorei, WGC3Denum, WGC3Dint)
DELEGATE_TO_GL_2(polygonOffset, PolygonOffset, WGC3Dfloat, WGC3Dfloat)
void WebGraphicsContext3DInProcessImpl::readPixels(
WGC3Dint x, WGC3Dint y, WGC3Dsizei width, WGC3Dsizei height,
WGC3Denum format, WGC3Denum type, void* pixels) {
makeContextCurrent();
// FIXME: remove the two glFlush calls when the driver bug is fixed, i.e.,
// all previous rendering calls should be done before reading pixels.
glFlush();
bool needs_resolve =
(attributes_.antialias && bound_fbo_ == multisample_fbo_);
if (needs_resolve) {
ResolveMultisampledFramebuffer(x, y, width, height);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fbo_);
glFlush();
}
glReadPixels(x, y, width, height, format, type, pixels);
if (needs_resolve)
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, bound_fbo_);
}
void WebGraphicsContext3DInProcessImpl::releaseShaderCompiler() {
}
void WebGraphicsContext3DInProcessImpl::renderbufferStorage(
WGC3Denum target,
WGC3Denum internalformat,
WGC3Dsizei width,
WGC3Dsizei height) {
makeContextCurrent();
if (!is_gles2_) {
switch (internalformat) {
case GL_DEPTH_STENCIL:
internalformat = GL_DEPTH24_STENCIL8_EXT;
break;
case GL_DEPTH_COMPONENT16:
internalformat = GL_DEPTH_COMPONENT;
break;
case GL_RGBA4:
case GL_RGB5_A1:
internalformat = GL_RGBA;
break;
case 0x8D62: // GL_RGB565
internalformat = GL_RGB;
break;
}
}
glRenderbufferStorageEXT(target, internalformat, width, height);
}
DELEGATE_TO_GL_2(sampleCoverage, SampleCoverage, WGC3Dclampf, WGC3Dboolean)
DELEGATE_TO_GL_4(scissor, Scissor, WGC3Dint, WGC3Dint, WGC3Dsizei, WGC3Dsizei)
void WebGraphicsContext3DInProcessImpl::texImage2D(
WGC3Denum target, WGC3Dint level, WGC3Denum internalFormat,
WGC3Dsizei width, WGC3Dsizei height, WGC3Dint border,
WGC3Denum format, WGC3Denum type, const void* pixels) {
makeContextCurrent();
if (gfx::GetGLImplementation() != gfx::kGLImplementationEGLGLES2) {
if (format == GL_BGRA_EXT && internalFormat == GL_BGRA_EXT) {
internalFormat = GL_RGBA;
} else if (type == GL_FLOAT) {
if (format == GL_RGBA) {
internalFormat = GL_RGBA32F_ARB;
} else if (format == GL_RGB) {
internalFormat = GL_RGB32F_ARB;
}
}
}
glTexImage2D(target, level, internalFormat,
width, height, border, format, type, pixels);
}
void WebGraphicsContext3DInProcessImpl::shaderSource(
WebGLId shader, const WGC3Dchar* source) {
makeContextCurrent();
GLint length = source ? strlen(source) : 0;
ShaderSourceMap::iterator result = shader_source_map_.find(shader);
if (result != shader_source_map_.end()) {
ShaderSourceEntry* entry = result->second;
DCHECK(entry);
entry->source.reset(new char[length + 1]);
if (source)
memcpy(entry->source.get(), source, (length + 1) * sizeof(char));
else
entry->source[0] = '\0';
} else {
glShaderSource(shader, 1, &source, &length);
}
}
DELEGATE_TO_GL_3(stencilFunc, StencilFunc, WGC3Denum, WGC3Dint, WGC3Duint)
DELEGATE_TO_GL_4(stencilFuncSeparate, StencilFuncSeparate,
WGC3Denum, WGC3Denum, WGC3Dint, WGC3Duint)
DELEGATE_TO_GL_1(stencilMask, StencilMask, WGC3Duint)
DELEGATE_TO_GL_2(stencilMaskSeparate, StencilMaskSeparate,
WGC3Denum, WGC3Duint)
DELEGATE_TO_GL_3(stencilOp, StencilOp,
WGC3Denum, WGC3Denum, WGC3Denum)
DELEGATE_TO_GL_4(stencilOpSeparate, StencilOpSeparate,
WGC3Denum, WGC3Denum, WGC3Denum, WGC3Denum)
DELEGATE_TO_GL_3(texParameterf, TexParameterf, WGC3Denum, WGC3Denum, WGC3Dfloat)
DELEGATE_TO_GL_3(texParameteri, TexParameteri, WGC3Denum, WGC3Denum, WGC3Dint)
DELEGATE_TO_GL_9(texSubImage2D, TexSubImage2D,
WGC3Denum, WGC3Dint, WGC3Dint, WGC3Dint, WGC3Dsizei,
WGC3Dsizei, WGC3Denum, WGC3Denum, const void*)
DELEGATE_TO_GL_2(uniform1f, Uniform1f, WGC3Dint, WGC3Dfloat)
DELEGATE_TO_GL_3(uniform1fv, Uniform1fv,
WGC3Dint, WGC3Dsizei, const WGC3Dfloat*)
DELEGATE_TO_GL_2(uniform1i, Uniform1i, WGC3Dint, WGC3Dint)
DELEGATE_TO_GL_3(uniform1iv, Uniform1iv, WGC3Dint, WGC3Dsizei, const WGC3Dint*)
DELEGATE_TO_GL_3(uniform2f, Uniform2f, WGC3Dint, WGC3Dfloat, WGC3Dfloat)
DELEGATE_TO_GL_3(uniform2fv, Uniform2fv,
WGC3Dint, WGC3Dsizei, const WGC3Dfloat*)
DELEGATE_TO_GL_3(uniform2i, Uniform2i, WGC3Dint, WGC3Dint, WGC3Dint)
DELEGATE_TO_GL_3(uniform2iv, Uniform2iv, WGC3Dint, WGC3Dsizei, const WGC3Dint*)
DELEGATE_TO_GL_4(uniform3f, Uniform3f,
WGC3Dint, WGC3Dfloat, WGC3Dfloat, WGC3Dfloat)
DELEGATE_TO_GL_3(uniform3fv, Uniform3fv,
WGC3Dint, WGC3Dsizei, const WGC3Dfloat*)
DELEGATE_TO_GL_4(uniform3i, Uniform3i, WGC3Dint, WGC3Dint, WGC3Dint, WGC3Dint)
DELEGATE_TO_GL_3(uniform3iv, Uniform3iv, WGC3Dint, WGC3Dsizei, const WGC3Dint*)
DELEGATE_TO_GL_5(uniform4f, Uniform4f, WGC3Dint,
WGC3Dfloat, WGC3Dfloat, WGC3Dfloat, WGC3Dfloat)
DELEGATE_TO_GL_3(uniform4fv, Uniform4fv,
WGC3Dint, WGC3Dsizei, const WGC3Dfloat*)
DELEGATE_TO_GL_5(uniform4i, Uniform4i, WGC3Dint,
WGC3Dint, WGC3Dint, WGC3Dint, WGC3Dint)
DELEGATE_TO_GL_3(uniform4iv, Uniform4iv, WGC3Dint, WGC3Dsizei, const WGC3Dint*)
DELEGATE_TO_GL_4(uniformMatrix2fv, UniformMatrix2fv,
WGC3Dint, WGC3Dsizei, WGC3Dboolean, const WGC3Dfloat*)
DELEGATE_TO_GL_4(uniformMatrix3fv, UniformMatrix3fv,
WGC3Dint, WGC3Dsizei, WGC3Dboolean, const WGC3Dfloat*)
DELEGATE_TO_GL_4(uniformMatrix4fv, UniformMatrix4fv,
WGC3Dint, WGC3Dsizei, WGC3Dboolean, const WGC3Dfloat*)
DELEGATE_TO_GL_1(useProgram, UseProgram, WebGLId)
DELEGATE_TO_GL_1(validateProgram, ValidateProgram, WebGLId)
DELEGATE_TO_GL_2(vertexAttrib1f, VertexAttrib1f, WGC3Duint, WGC3Dfloat)
DELEGATE_TO_GL_2(vertexAttrib1fv, VertexAttrib1fv, WGC3Duint, const WGC3Dfloat*)
DELEGATE_TO_GL_3(vertexAttrib2f, VertexAttrib2f,
WGC3Duint, WGC3Dfloat, WGC3Dfloat)
DELEGATE_TO_GL_2(vertexAttrib2fv, VertexAttrib2fv, WGC3Duint, const WGC3Dfloat*)
DELEGATE_TO_GL_4(vertexAttrib3f, VertexAttrib3f,
WGC3Duint, WGC3Dfloat, WGC3Dfloat, WGC3Dfloat)
DELEGATE_TO_GL_2(vertexAttrib3fv, VertexAttrib3fv, WGC3Duint, const WGC3Dfloat*)
DELEGATE_TO_GL_5(vertexAttrib4f, VertexAttrib4f,
WGC3Duint, WGC3Dfloat, WGC3Dfloat, WGC3Dfloat, WGC3Dfloat)
DELEGATE_TO_GL_2(vertexAttrib4fv, VertexAttrib4fv, WGC3Duint, const WGC3Dfloat*)
void WebGraphicsContext3DInProcessImpl::vertexAttribPointer(
WGC3Duint index, WGC3Dint size, WGC3Denum type, WGC3Dboolean normalized,
WGC3Dsizei stride, WGC3Dintptr offset) {
makeContextCurrent();
glVertexAttribPointer(index, size, type, normalized, stride,
reinterpret_cast<void*>(static_cast<intptr_t>(offset)));
}
DELEGATE_TO_GL_4(viewport, Viewport, WGC3Dint, WGC3Dint, WGC3Dsizei, WGC3Dsizei)
WebGLId WebGraphicsContext3DInProcessImpl::createBuffer() {
makeContextCurrent();
GLuint o = 0;
glGenBuffersARB(1, &o);
return o;
}
WebGLId WebGraphicsContext3DInProcessImpl::createFramebuffer() {
makeContextCurrent();
GLuint o = 0;
glGenFramebuffersEXT(1, &o);
return o;
}
WebGLId WebGraphicsContext3DInProcessImpl::createProgram() {
makeContextCurrent();
return glCreateProgram();
}
WebGLId WebGraphicsContext3DInProcessImpl::createRenderbuffer() {
makeContextCurrent();
GLuint o = 0;
glGenRenderbuffersEXT(1, &o);
return o;
}
WebGLId WebGraphicsContext3DInProcessImpl::createShader(
WGC3Denum shaderType) {
makeContextCurrent();
DCHECK(shaderType == GL_VERTEX_SHADER || shaderType == GL_FRAGMENT_SHADER);
GLuint shader = glCreateShader(shaderType);
if (shader) {
ShaderSourceMap::iterator result = shader_source_map_.find(shader);
if (result != shader_source_map_.end()) {
delete result->second;
shader_source_map_.erase(result);
}
shader_source_map_.insert(
ShaderSourceMap::value_type(shader, new ShaderSourceEntry(shaderType)));
}
return shader;
}
WebGLId WebGraphicsContext3DInProcessImpl::createTexture() {
makeContextCurrent();
GLuint o = 0;
glGenTextures(1, &o);
return o;
}
void WebGraphicsContext3DInProcessImpl::deleteBuffer(WebGLId buffer) {
makeContextCurrent();
glDeleteBuffersARB(1, &buffer);
}
void WebGraphicsContext3DInProcessImpl::deleteFramebuffer(
WebGLId framebuffer) {
makeContextCurrent();
glDeleteFramebuffersEXT(1, &framebuffer);
}
void WebGraphicsContext3DInProcessImpl::deleteProgram(WebGLId program) {
makeContextCurrent();
glDeleteProgram(program);
}
void WebGraphicsContext3DInProcessImpl::deleteRenderbuffer(
WebGLId renderbuffer) {
makeContextCurrent();
glDeleteRenderbuffersEXT(1, &renderbuffer);
}
void WebGraphicsContext3DInProcessImpl::deleteShader(WebGLId shader) {
makeContextCurrent();
ShaderSourceMap::iterator result = shader_source_map_.find(shader);
if (result != shader_source_map_.end()) {
delete result->second;
shader_source_map_.erase(result);
}
glDeleteShader(shader);
}
void WebGraphicsContext3DInProcessImpl::deleteTexture(WebGLId texture) {
makeContextCurrent();
glDeleteTextures(1, &texture);
}
WGC3Denum WebGraphicsContext3DInProcessImpl::getGraphicsResetStatusARB() {
// TODO(kbr): this implementation doesn't support lost contexts yet.
return GL_NO_ERROR;
}
void WebGraphicsContext3DInProcessImpl::texImageIOSurface2DCHROMIUM(
WGC3Denum target, WGC3Dint width, WGC3Dint height,
WGC3Duint ioSurfaceId, WGC3Duint plane) {
}
DELEGATE_TO_GL_5(texStorage2DEXT, TexStorage2DEXT,
WGC3Denum, WGC3Dint, WGC3Duint, WGC3Dint, WGC3Dint)
WebGLId WebGraphicsContext3DInProcessImpl::createQueryEXT()
{
makeContextCurrent();
GLuint o = 0;
glGenQueriesARB(1, &o);
return o;
}
void WebGraphicsContext3DInProcessImpl::deleteQueryEXT(WebGLId query)
{
makeContextCurrent();
glDeleteQueriesARB(1, &query);
}
DELEGATE_TO_GL_1R(isQueryEXT, IsQueryARB, WebGLId, WGC3Dboolean)
DELEGATE_TO_GL_2(beginQueryEXT, BeginQueryARB, WGC3Denum, WebGLId)
DELEGATE_TO_GL_1(endQueryEXT, EndQueryARB, WGC3Denum)
DELEGATE_TO_GL_3(getQueryivEXT, GetQueryivARB, WGC3Denum, WGC3Denum, WGC3Dint*)
DELEGATE_TO_GL_3(getQueryObjectuivEXT, GetQueryObjectuivARB,
WebGLId, WGC3Denum, WGC3Duint*)
#if WEBKIT_USING_SKIA
GrGLInterface* WebGraphicsContext3DInProcessImpl::onCreateGrGLInterface() {
return gfx::CreateInProcessSkiaGLBinding();
}
#endif
bool WebGraphicsContext3DInProcessImpl::AngleCreateCompilers() {
if (!ShInitialize())
return false;
ShBuiltInResources resources;
ShInitBuiltInResources(&resources);
getIntegerv(GL_MAX_VERTEX_ATTRIBS, &resources.MaxVertexAttribs);
getIntegerv(MAX_VERTEX_UNIFORM_VECTORS, &resources.MaxVertexUniformVectors);
getIntegerv(MAX_VARYING_VECTORS, &resources.MaxVaryingVectors);
getIntegerv(GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS,
&resources.MaxVertexTextureImageUnits);
getIntegerv(GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS,
&resources.MaxCombinedTextureImageUnits);
getIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS, &resources.MaxTextureImageUnits);
getIntegerv(MAX_FRAGMENT_UNIFORM_VECTORS,
&resources.MaxFragmentUniformVectors);
// Always set to 1 for OpenGL ES.
resources.MaxDrawBuffers = 1;
fragment_compiler_ = ShConstructCompiler(
SH_FRAGMENT_SHADER, SH_WEBGL_SPEC,
is_gles2_ ? SH_ESSL_OUTPUT : SH_GLSL_OUTPUT, &resources);
vertex_compiler_ = ShConstructCompiler(
SH_VERTEX_SHADER, SH_WEBGL_SPEC,
is_gles2_ ? SH_ESSL_OUTPUT : SH_GLSL_OUTPUT, &resources);
return (fragment_compiler_ && vertex_compiler_);
}
void WebGraphicsContext3DInProcessImpl::AngleDestroyCompilers() {
if (fragment_compiler_) {
ShDestruct(fragment_compiler_);
fragment_compiler_ = 0;
}
if (vertex_compiler_) {
ShDestruct(vertex_compiler_);
vertex_compiler_ = 0;
}
}
bool WebGraphicsContext3DInProcessImpl::AngleValidateShaderSource(
ShaderSourceEntry* entry) {
entry->is_valid = false;
entry->translated_source.reset();
entry->log.reset();
ShHandle compiler = 0;
switch (entry->type) {
case GL_FRAGMENT_SHADER:
compiler = fragment_compiler_;
break;
case GL_VERTEX_SHADER:
compiler = vertex_compiler_;
break;
}
if (!compiler)
return false;
char* source = entry->source.get();
if (!ShCompile(compiler, &source, 1, SH_OBJECT_CODE)) {
int logSize = 0;
ShGetInfo(compiler, SH_INFO_LOG_LENGTH, &logSize);
if (logSize > 1) {
entry->log.reset(new char[logSize]);
ShGetInfoLog(compiler, entry->log.get());
}
return false;
}
int length = 0;
ShGetInfo(compiler, SH_OBJECT_CODE_LENGTH, &length);
if (length > 1) {
entry->translated_source.reset(new char[length]);
ShGetObjectCode(compiler, entry->translated_source.get());
}
entry->is_valid = true;
return true;
}
} // namespace gpu
} // namespace webkit