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// Copyright 2015 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/resources/gpu_rasterizer.h"
#include <algorithm>
#include "base/bind.h"
#include "base/metrics/histogram.h"
#include "base/trace_event/trace_event.h"
#include "cc/debug/devtools_instrumentation.h"
#include "cc/debug/frame_viewer_instrumentation.h"
#include "cc/output/context_provider.h"
#include "cc/resources/raster_buffer.h"
#include "cc/resources/raster_source.h"
#include "cc/resources/resource.h"
#include "cc/resources/resource_provider.h"
#include "cc/resources/scoped_gpu_raster.h"
#include "cc/resources/tile_manager.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 {
// static
scoped_ptr<GpuRasterizer> GpuRasterizer::Create(
ContextProvider* context_provider,
ResourceProvider* resource_provider,
bool use_distance_field_text,
bool threaded_gpu_rasterization_enabled,
int msaa_sample_count) {
return make_scoped_ptr<GpuRasterizer>(new GpuRasterizer(
context_provider, resource_provider, use_distance_field_text,
threaded_gpu_rasterization_enabled, msaa_sample_count));
}
GpuRasterizer::GpuRasterizer(ContextProvider* context_provider,
ResourceProvider* resource_provider,
bool use_distance_field_text,
bool threaded_gpu_rasterization_enabled,
int msaa_sample_count)
: context_provider_(context_provider),
resource_provider_(resource_provider),
use_distance_field_text_(use_distance_field_text),
threaded_gpu_rasterization_enabled_(threaded_gpu_rasterization_enabled),
msaa_sample_count_(msaa_sample_count) {
DCHECK(context_provider_);
}
GpuRasterizer::~GpuRasterizer() {
}
PrepareTilesMode GpuRasterizer::GetPrepareTilesMode() {
return PrepareTilesMode::PREPARE_NONE;
}
void GpuRasterizer::RasterizeTiles(
const TileVector& tiles,
ResourcePool* resource_pool,
ResourceFormat resource_format,
const UpdateTileDrawInfoCallback& update_tile_draw_info) {
ScopedGpuRaster gpu_raster(context_provider_);
ScopedResourceWriteLocks locks;
for (Tile* tile : tiles) {
RasterSource::SolidColorAnalysis analysis;
if (tile->use_picture_analysis())
PerformSolidColorAnalysis(tile, &analysis);
scoped_ptr<ScopedResource> resource;
if (!analysis.is_solid_color) {
resource = resource_pool->AcquireResource(tile->desired_texture_size(),
resource_format);
AddToMultiPictureDraw(tile, resource.get(), &locks);
}
update_tile_draw_info.Run(tile, resource.Pass(), analysis);
}
// If MSAA is enabled, tell Skia to resolve each render target after draw.
multi_picture_draw_.draw(msaa_sample_count_ > 0);
}
void GpuRasterizer::PerformSolidColorAnalysis(
const Tile* tile,
RasterSource::SolidColorAnalysis* analysis) {
const void* tile_id = static_cast<const void*>(tile);
frame_viewer_instrumentation::ScopedAnalyzeTask analyze_task(
tile_id, tile->combined_priority().resolution,
tile->source_frame_number(), tile->layer_id());
DCHECK(tile->raster_source());
tile->raster_source()->PerformSolidColorAnalysis(
tile->content_rect(), tile->contents_scale(), analysis);
// Record the solid color prediction.
UMA_HISTOGRAM_BOOLEAN("Renderer4.SolidColorTilesAnalyzed",
analysis->is_solid_color);
}
void GpuRasterizer::AddToMultiPictureDraw(const Tile* tile,
const ScopedResource* resource,
ScopedResourceWriteLocks* locks) {
const void* tile_id = static_cast<const void*>(tile);
frame_viewer_instrumentation::ScopedRasterTask raster_task(
tile_id, tile->combined_priority().resolution,
tile->source_frame_number(), tile->layer_id());
DCHECK(tile->raster_source());
// Turn on distance fields for layers that have ever animated.
bool use_distance_field_text =
use_distance_field_text_ ||
tile->raster_source()->ShouldAttemptToUseDistanceFieldText();
scoped_ptr<ResourceProvider::ScopedWriteLockGr> lock(
new ResourceProvider::ScopedWriteLockGr(
resource_provider_, resource->id(), use_distance_field_text,
tile->raster_source()->CanUseLCDText(), msaa_sample_count_));
SkSurface* sk_surface = lock->get_sk_surface();
if (!sk_surface)
return;
locks->push_back(lock.Pass());
SkRTreeFactory factory;
SkPictureRecorder recorder;
gfx::Size size = resource->size();
const int flags = SkPictureRecorder::kComputeSaveLayerInfo_RecordFlag;
skia::RefPtr<SkCanvas> canvas = skia::SharePtr(
recorder.beginRecording(size.width(), size.height(), &factory, flags));
canvas->save();
tile->raster_source()->PlaybackToCanvas(canvas.get(), tile->content_rect(),
tile->contents_scale());
canvas->restore();
// Add the canvas and recorded picture to |multi_picture_draw_|.
skia::RefPtr<SkPicture> picture = skia::AdoptRef(recorder.endRecording());
multi_picture_draw_.add(sk_surface->getCanvas(), picture.get());
}
} // namespace cc
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