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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/raster/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/playback/display_list_raster_source.h"
#include "cc/raster/raster_buffer.h"
#include "cc/raster/scoped_gpu_raster.h"
#include "cc/resources/resource.h"
#include "cc/resources/resource_provider.h"
#include "cc/tiles/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 {
GpuRasterizer::GpuRasterizer(ContextProvider* context_provider,
ResourceProvider* resource_provider,
bool use_distance_field_text,
int msaa_sample_count)
: resource_provider_(resource_provider),
use_distance_field_text_(use_distance_field_text),
msaa_sample_count_(msaa_sample_count) {
}
GpuRasterizer::~GpuRasterizer() {
}
void GpuRasterizer::RasterizeSource(
ResourceProvider::ScopedWriteLockGr* write_lock,
const DisplayListRasterSource* raster_source,
const gfx::Rect& raster_full_rect,
const gfx::Rect& playback_rect,
float scale) {
// Play back raster_source into temp SkPicture.
SkPictureRecorder recorder;
const gfx::Size size = write_lock->GetResourceSize();
const int flags = SkPictureRecorder::kComputeSaveLayerInfo_RecordFlag;
skia::RefPtr<SkCanvas> canvas = skia::SharePtr(
recorder.beginRecording(size.width(), size.height(), NULL, flags));
canvas->save();
raster_source->PlaybackToCanvas(canvas.get(), raster_full_rect, playback_rect,
scale);
canvas->restore();
skia::RefPtr<SkPicture> picture =
skia::AdoptRef(recorder.endRecordingAsPicture());
// Turn on distance fields for layers that have ever animated.
bool use_distance_field_text =
use_distance_field_text_ ||
raster_source->ShouldAttemptToUseDistanceFieldText();
// Playback picture into resource.
{
ScopedGpuRaster gpu_raster(
resource_provider_->output_surface()->worker_context_provider());
write_lock->InitSkSurface(use_distance_field_text,
raster_source->CanUseLCDText(),
msaa_sample_count_);
SkSurface* sk_surface = write_lock->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;
SkMultiPictureDraw multi_picture_draw;
multi_picture_draw.add(sk_surface->getCanvas(), picture.get());
multi_picture_draw.draw(false);
write_lock->ReleaseSkSurface();
}
}
} // namespace cc
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