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| 1 // Copyright 2015 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "cc/resources/gpu_rasterizer.h" | |
| 6 | |
| 7 #include <algorithm> | |
| 8 | |
| 9 #include "base/bind.h" | |
| 10 #include "base/metrics/histogram.h" | |
| 11 #include "base/trace_event/trace_event.h" | |
| 12 #include "cc/debug/devtools_instrumentation.h" | |
| 13 #include "cc/debug/frame_viewer_instrumentation.h" | |
| 14 #include "cc/output/context_provider.h" | |
| 15 #include "cc/resources/raster_buffer.h" | |
| 16 #include "cc/resources/raster_source.h" | |
| 17 #include "cc/resources/resource.h" | |
| 18 #include "cc/resources/resource_provider.h" | |
| 19 #include "cc/resources/scoped_gpu_raster.h" | |
| 20 #include "cc/resources/tile_manager.h" | |
| 21 #include "gpu/command_buffer/client/gles2_interface.h" | |
| 22 #include "third_party/skia/include/core/SkMultiPictureDraw.h" | |
| 23 #include "third_party/skia/include/core/SkPictureRecorder.h" | |
| 24 #include "third_party/skia/include/core/SkSurface.h" | |
| 25 #include "third_party/skia/include/gpu/GrContext.h" | |
| 26 | |
| 27 namespace cc { | |
| 28 | |
| 29 GpuRasterizer::GpuRasterizer(ContextProvider* context_provider, | |
| 30 ResourceProvider* resource_provider, | |
| 31 bool use_distance_field_text, | |
| 32 int msaa_sample_count) | |
| 33 : resource_provider_(resource_provider), | |
| 34 use_distance_field_text_(use_distance_field_text), | |
| 35 msaa_sample_count_(msaa_sample_count) { | |
| 36 } | |
| 37 | |
| 38 GpuRasterizer::~GpuRasterizer() { | |
| 39 } | |
| 40 | |
| 41 void GpuRasterizer::RasterizeSource( | |
| 42 ResourceProvider::ScopedWriteLockGr* write_lock, | |
| 43 const RasterSource* raster_source, | |
| 44 const gfx::Rect& rect, | |
| 45 float scale) { | |
| 46 // Play back raster_source into temp SkPicture. | |
| 47 SkPictureRecorder recorder; | |
| 48 gfx::Size size = write_lock->resource()->size; | |
| 49 const int flags = SkPictureRecorder::kComputeSaveLayerInfo_RecordFlag; | |
| 50 skia::RefPtr<SkCanvas> canvas = skia::SharePtr( | |
| 51 recorder.beginRecording(size.width(), size.height(), NULL, flags)); | |
| 52 canvas->save(); | |
| 53 raster_source->PlaybackToCanvas(canvas.get(), rect, scale); | |
| 54 canvas->restore(); | |
| 55 skia::RefPtr<SkPicture> picture = | |
| 56 skia::AdoptRef(recorder.endRecordingAsPicture()); | |
| 57 | |
| 58 // Turn on distance fields for layers that have ever animated. | |
| 59 bool use_distance_field_text = | |
| 60 use_distance_field_text_ || | |
| 61 raster_source->ShouldAttemptToUseDistanceFieldText(); | |
| 62 | |
| 63 // Playback picture into resource. | |
| 64 { | |
| 65 ScopedGpuRaster gpu_raster( | |
| 66 resource_provider_->output_surface()->worker_context_provider()); | |
| 67 write_lock->InitSkSurface(use_distance_field_text, | |
| 68 raster_source->CanUseLCDText(), | |
| 69 msaa_sample_count_); | |
| 70 | |
| 71 SkSurface* sk_surface = write_lock->sk_surface(); | |
| 72 | |
| 73 // Allocating an SkSurface will fail after a lost context. Pretend we | |
| 74 // rasterized, as the contents of the resource don't matter anymore. | |
| 75 if (!sk_surface) | |
| 76 return; | |
| 77 | |
| 78 SkMultiPictureDraw multi_picture_draw; | |
| 79 multi_picture_draw.add(sk_surface->getCanvas(), picture.get()); | |
| 80 multi_picture_draw.draw(msaa_sample_count_ > 0); | |
| 81 write_lock->ReleaseSkSurface(); | |
| 82 } | |
| 83 } | |
| 84 | |
| 85 } // namespace cc | |
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