blob: 85a77c201b3e62858684bcaae2729df63f4e35dd [file] [log] [blame]
// Copyright 2014 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 "cc/raster/gpu_raster_buffer_provider.h"
#include <stdint.h>
#include <algorithm>
#include "base/macros.h"
#include "base/memory/ptr_util.h"
#include "base/metrics/histogram_macros.h"
#include "base/trace_event/trace_event.h"
#include "cc/base/histograms.h"
#include "cc/playback/image_hijack_canvas.h"
#include "cc/playback/raster_source.h"
#include "cc/raster/scoped_gpu_raster.h"
#include "cc/resources/resource.h"
#include "gpu/command_buffer/client/gles2_interface.h"
#include "third_party/skia/include/core/SkMultiPictureDraw.h"
#include "third_party/skia/include/core/SkPictureRecorder.h"
#include "third_party/skia/include/core/SkSurface.h"
#include "third_party/skia/include/gpu/GrContext.h"
namespace cc {
namespace {
static sk_sp<SkPicture> PlaybackToPicture(
const RasterSource* raster_source,
bool resource_has_previous_content,
const gfx::Size& resource_size,
const gfx::Rect& raster_full_rect,
const gfx::Rect& raster_dirty_rect,
float scale,
const RasterSource::PlaybackSettings& playback_settings) {
// GPU raster doesn't do low res tiles, so should always include images.
DCHECK(!playback_settings.skip_images);
gfx::Rect playback_rect = raster_full_rect;
if (resource_has_previous_content) {
playback_rect.Intersect(raster_dirty_rect);
}
DCHECK(!playback_rect.IsEmpty())
<< "Why are we rastering a tile that's not dirty?";
// Log a histogram of the percentage of pixels that were saved due to
// partial raster.
const char* client_name = GetClientNameForMetrics();
float full_rect_size = raster_full_rect.size().GetArea();
if (full_rect_size > 0 && client_name) {
float fraction_partial_rastered =
static_cast<float>(playback_rect.size().GetArea()) / full_rect_size;
float fraction_saved = 1.0f - fraction_partial_rastered;
UMA_HISTOGRAM_PERCENTAGE(
base::StringPrintf("Renderer4.%s.PartialRasterPercentageSaved.Gpu",
client_name),
100.0f * fraction_saved);
}
// Play back raster_source into temp SkPicture.
SkPictureRecorder recorder;
sk_sp<SkCanvas> canvas = sk_ref_sp(
recorder.beginRecording(resource_size.width(), resource_size.height()));
canvas->save();
// The GPU image decode controller assumes that Skia is done with an image
// when playback is complete. However, in this case, where we play back to a
// picture, we don't actually finish with the images until the picture is
// rasterized later. This can cause lifetime issues in the GPU image decode
// controller. To avoid this, we disable the image hijack canvas (and image
// decode controller) for this playback step, instead enabling it for the
// later picture rasterization.
RasterSource::PlaybackSettings settings = playback_settings;
settings.use_image_hijack_canvas = false;
raster_source->PlaybackToCanvas(canvas.get(), raster_full_rect, playback_rect,
scale, settings);
canvas->restore();
return recorder.finishRecordingAsPicture();
}
static void RasterizePicture(SkPicture* picture,
ContextProvider* context_provider,
ResourceProvider::ScopedWriteLockGL* resource_lock,
bool async_worker_context_enabled,
bool use_distance_field_text,
bool can_use_lcd_text,
int msaa_sample_count,
ImageDecodeController* image_decode_controller,
bool use_image_hijack_canvas) {
ScopedGpuRaster gpu_raster(context_provider);
ResourceProvider::ScopedSkSurfaceProvider scoped_surface(
context_provider, resource_lock, async_worker_context_enabled,
use_distance_field_text, can_use_lcd_text, msaa_sample_count);
SkSurface* sk_surface = scoped_surface.sk_surface();
// Allocating an SkSurface will fail after a lost context. Pretend we
// rasterized, as the contents of the resource don't matter anymore.
if (!sk_surface)
return;
// As we did not use the image hijack canvas during the initial playback to
// |picture| (see PlaybackToPicture), we must enable it here if requested.
SkCanvas* canvas = sk_surface->getCanvas();
std::unique_ptr<ImageHijackCanvas> hijack_canvas;
if (use_image_hijack_canvas) {
DCHECK(image_decode_controller);
const SkImageInfo& info = canvas->imageInfo();
hijack_canvas.reset(new ImageHijackCanvas(info.width(), info.height(),
image_decode_controller));
SkIRect raster_bounds;
canvas->getClipDeviceBounds(&raster_bounds);
hijack_canvas->clipRect(SkRect::MakeFromIRect(raster_bounds));
hijack_canvas->setMatrix(canvas->getTotalMatrix());
hijack_canvas->addCanvas(canvas);
// Replace canvas with our ImageHijackCanvas which is wrapping it.
canvas = hijack_canvas.get();
}
SkMultiPictureDraw multi_picture_draw;
multi_picture_draw.add(canvas, picture);
multi_picture_draw.draw(false);
}
} // namespace
GpuRasterBufferProvider::RasterBufferImpl::RasterBufferImpl(
GpuRasterBufferProvider* client,
ResourceProvider* resource_provider,
ResourceId resource_id,
bool async_worker_context_enabled,
bool resource_has_previous_content)
: client_(client),
lock_(resource_provider, resource_id, async_worker_context_enabled),
resource_has_previous_content_(resource_has_previous_content) {
client_->pending_raster_buffers_.insert(this);
}
GpuRasterBufferProvider::RasterBufferImpl::~RasterBufferImpl() {
client_->pending_raster_buffers_.erase(this);
}
void GpuRasterBufferProvider::RasterBufferImpl::Playback(
const RasterSource* raster_source,
const gfx::Rect& raster_full_rect,
const gfx::Rect& raster_dirty_rect,
uint64_t new_content_id,
float scale,
const RasterSource::PlaybackSettings& playback_settings) {
TRACE_EVENT0("cc", "GpuRasterBuffer::Playback");
client_->PlaybackOnWorkerThread(&lock_, sync_token_,
resource_has_previous_content_, raster_source,
raster_full_rect, raster_dirty_rect,
new_content_id, scale, playback_settings);
}
GpuRasterBufferProvider::GpuRasterBufferProvider(
ContextProvider* compositor_context_provider,
ContextProvider* worker_context_provider,
ResourceProvider* resource_provider,
bool use_distance_field_text,
int gpu_rasterization_msaa_sample_count,
bool async_worker_context_enabled)
: compositor_context_provider_(compositor_context_provider),
worker_context_provider_(worker_context_provider),
resource_provider_(resource_provider),
use_distance_field_text_(use_distance_field_text),
msaa_sample_count_(gpu_rasterization_msaa_sample_count),
async_worker_context_enabled_(async_worker_context_enabled) {
DCHECK(compositor_context_provider);
DCHECK(worker_context_provider);
}
GpuRasterBufferProvider::~GpuRasterBufferProvider() {
DCHECK(pending_raster_buffers_.empty());
}
std::unique_ptr<RasterBuffer> GpuRasterBufferProvider::AcquireBufferForRaster(
const Resource* resource,
uint64_t resource_content_id,
uint64_t previous_content_id) {
bool resource_has_previous_content =
resource_content_id && resource_content_id == previous_content_id;
return base::MakeUnique<RasterBufferImpl>(
this, resource_provider_, resource->id(), async_worker_context_enabled_,
resource_has_previous_content);
}
void GpuRasterBufferProvider::ReleaseBufferForRaster(
std::unique_ptr<RasterBuffer> buffer) {
// Nothing to do here. RasterBufferImpl destructor cleans up after itself.
}
void GpuRasterBufferProvider::OrderingBarrier() {
TRACE_EVENT0("cc", "GpuRasterBufferProvider::OrderingBarrier");
gpu::gles2::GLES2Interface* gl = compositor_context_provider_->ContextGL();
if (async_worker_context_enabled_) {
GLuint64 fence = gl->InsertFenceSyncCHROMIUM();
gl->OrderingBarrierCHROMIUM();
gpu::SyncToken sync_token;
gl->GenUnverifiedSyncTokenCHROMIUM(fence, sync_token.GetData());
DCHECK(sync_token.HasData() ||
gl->GetGraphicsResetStatusKHR() != GL_NO_ERROR);
for (RasterBufferImpl* buffer : pending_raster_buffers_)
buffer->set_sync_token(sync_token);
} else {
gl->OrderingBarrierCHROMIUM();
}
pending_raster_buffers_.clear();
}
ResourceFormat GpuRasterBufferProvider::GetResourceFormat(
bool must_support_alpha) const {
return resource_provider_->best_render_buffer_format();
}
bool GpuRasterBufferProvider::IsResourceSwizzleRequired(
bool must_support_alpha) const {
// This doesn't require a swizzle because we rasterize to the correct format.
return false;
}
bool GpuRasterBufferProvider::CanPartialRasterIntoProvidedResource() const {
// Partial raster doesn't support MSAA, as the MSAA resolve is unaware of clip
// rects.
// TODO(crbug.com/629683): See if we can work around this limitation.
return msaa_sample_count_ == 0;
}
void GpuRasterBufferProvider::Shutdown() {
pending_raster_buffers_.clear();
}
void GpuRasterBufferProvider::PlaybackOnWorkerThread(
ResourceProvider::ScopedWriteLockGL* resource_lock,
const gpu::SyncToken& sync_token,
bool resource_has_previous_content,
const RasterSource* raster_source,
const gfx::Rect& raster_full_rect,
const gfx::Rect& raster_dirty_rect,
uint64_t new_content_id,
float scale,
const RasterSource::PlaybackSettings& playback_settings) {
ContextProvider::ScopedContextLock scoped_context(worker_context_provider_);
gpu::gles2::GLES2Interface* gl = scoped_context.ContextGL();
DCHECK(gl);
if (async_worker_context_enabled_) {
// Early out if sync token is invalid. This happens if the compositor
// context was lost before ScheduleTasks was called.
if (!sync_token.HasData())
return;
// Synchronize with compositor.
gl->WaitSyncTokenCHROMIUM(sync_token.GetConstData());
}
sk_sp<SkPicture> picture = PlaybackToPicture(
raster_source, resource_has_previous_content, resource_lock->size(),
raster_full_rect, raster_dirty_rect, scale, playback_settings);
// Turn on distance fields for layers that have ever animated.
bool use_distance_field_text =
use_distance_field_text_ ||
raster_source->ShouldAttemptToUseDistanceFieldText();
RasterizePicture(picture.get(), worker_context_provider_, resource_lock,
async_worker_context_enabled_, use_distance_field_text,
raster_source->CanUseLCDText(), msaa_sample_count_,
raster_source->image_decode_controller(),
playback_settings.use_image_hijack_canvas);
const uint64_t fence_sync = gl->InsertFenceSyncCHROMIUM();
// Barrier to sync worker context output to cc context.
gl->OrderingBarrierCHROMIUM();
// Generate sync token after the barrier for cross context synchronization.
gpu::SyncToken resource_sync_token;
gl->GenUnverifiedSyncTokenCHROMIUM(fence_sync, resource_sync_token.GetData());
resource_lock->set_sync_token(resource_sync_token);
resource_lock->set_synchronized(!async_worker_context_enabled_);
}
} // namespace cc