cc/raster/gpu_raster_buffer_provider.h

// 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.

#ifndef CC_RASTER_GPU_RASTER_BUFFER_PROVIDER_H_
#define CC_RASTER_GPU_RASTER_BUFFER_PROVIDER_H_

#include <stdint.h>

#include "base/macros.h"
#include "cc/raster/raster_buffer_provider.h"
#include "cc/resources/layer_tree_resource_provider.h"
#include "gpu/command_buffer/common/sync_token.h"

namespace viz {
class ContextProvider;
class RasterContextProvider;
}  // namespace viz

namespace cc {

class CC_EXPORT GpuRasterBufferProvider : public RasterBufferProvider {
 public:
  GpuRasterBufferProvider(viz::ContextProvider* compositor_context_provider,
                          viz::RasterContextProvider* worker_context_provider,
                          LayerTreeResourceProvider* resource_provider,
                          bool use_distance_field_text,
                          int gpu_rasterization_msaa_sample_count,
                          viz::ResourceFormat preferred_tile_format,
                          bool enable_oop_rasterization);
  ~GpuRasterBufferProvider() override;

  // Overridden from RasterBufferProvider:
  std::unique_ptr<RasterBuffer> AcquireBufferForRaster(
      const ResourcePool::InUsePoolResource& resource,
      uint64_t resource_content_id,
      uint64_t previous_content_id) override;
  void OrderingBarrier() override;
  void Flush() override;
  viz::ResourceFormat GetResourceFormat(bool must_support_alpha) const override;
  bool IsResourceSwizzleRequired(bool must_support_alpha) const override;
  bool CanPartialRasterIntoProvidedResource() const override;
  bool IsResourceReadyToDraw(
      const ResourcePool::InUsePoolResource& resource) const override;
  uint64_t SetReadyToDrawCallback(
      const std::vector<const ResourcePool::InUsePoolResource*>& resources,
      const base::Closure& callback,
      uint64_t pending_callback_id) const override;
  void Shutdown() override;

  void PlaybackOnWorkerThread(
      LayerTreeResourceProvider::ScopedWriteLockRaster* 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,
      const gfx::AxisTransform2d& transform,
      const RasterSource::PlaybackSettings& playback_settings);

 private:
  class RasterBufferImpl : public RasterBuffer {
   public:
    RasterBufferImpl(GpuRasterBufferProvider* client,
                     LayerTreeResourceProvider* resource_provider,
                     viz::ResourceId resource_id,
                     bool resource_has_previous_content);
    ~RasterBufferImpl() override;

    // Overridden from RasterBuffer:
    void Playback(
        const RasterSource* raster_source,
        const gfx::Rect& raster_full_rect,
        const gfx::Rect& raster_dirty_rect,
        uint64_t new_content_id,
        const gfx::AxisTransform2d& transform,
        const RasterSource::PlaybackSettings& playback_settings) override;

    void set_sync_token(const gpu::SyncToken& sync_token) {
      sync_token_ = sync_token;
    }

   private:
    GpuRasterBufferProvider* const client_;
    LayerTreeResourceProvider::ScopedWriteLockRaster lock_;
    const bool resource_has_previous_content_;

    gpu::SyncToken sync_token_;

    DISALLOW_COPY_AND_ASSIGN(RasterBufferImpl);
  };

  viz::ContextProvider* const compositor_context_provider_;
  viz::RasterContextProvider* const worker_context_provider_;
  LayerTreeResourceProvider* const resource_provider_;
  const bool use_distance_field_text_;
  const int msaa_sample_count_;
  const viz::ResourceFormat preferred_tile_format_;
  const bool enable_oop_rasterization_;

  std::set<RasterBufferImpl*> pending_raster_buffers_;

  DISALLOW_COPY_AND_ASSIGN(GpuRasterBufferProvider);
};

}  // namespace cc

#endif  // CC_RASTER_GPU_RASTER_BUFFER_PROVIDER_H_