cc/raster/one_copy_raster_buffer_provider.h

// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CC_RASTER_ONE_COPY_RASTER_BUFFER_PROVIDER_H_
#define CC_RASTER_ONE_COPY_RASTER_BUFFER_PROVIDER_H_

#include <stdint.h>

#include <memory>
#include <vector>

#include "base/memory/raw_ptr.h"
#include "base/task/sequenced_task_runner.h"
#include "cc/raster/raster_buffer.h"
#include "cc/raster/raster_buffer_provider.h"
#include "cc/raster/staging_buffer_pool.h"
#include "components/viz/client/client_resource_provider.h"
#include "gpu/command_buffer/common/sync_token.h"

class GURL;

namespace viz {
class RasterContextProvider;
}  // namespace viz

namespace cc {
struct StagingBuffer;
class StagingBufferPool;

class CC_EXPORT OneCopyRasterBufferProvider : public RasterBufferProvider {
 public:
  OneCopyRasterBufferProvider(
      scoped_refptr<gpu::SharedImageInterface> sii,
      scoped_refptr<base::SequencedTaskRunner> task_runner,
      viz::RasterContextProvider* compositor_context_provider,
      viz::RasterContextProvider* worker_context_provider,
      bool use_partial_raster,
      int max_staging_buffer_usage_in_bytes,
      bool is_overlay_candidate);
  OneCopyRasterBufferProvider(const OneCopyRasterBufferProvider&) = delete;
  ~OneCopyRasterBufferProvider() override;

  OneCopyRasterBufferProvider& operator=(const OneCopyRasterBufferProvider&) =
      delete;

  // Overridden from RasterBufferProvider:
  std::unique_ptr<RasterBuffer> AcquireBufferForRaster(
      const ResourcePool::InUsePoolResource& resource,
      uint64_t resource_content_id,
      uint64_t previous_content_id,
      bool depends_on_at_raster_decodes,
      bool depends_on_hardware_accelerated_jpeg_candidates,
      bool depends_on_hardware_accelerated_webp_candidates) override;
  bool CanPartialRasterIntoProvidedResource() const override;
  bool IsResourceReadyToDraw(
      const ResourcePool::InUsePoolResource& resource) override;
  uint64_t SetReadyToDrawCallback(
      const std::vector<const ResourcePool::InUsePoolResource*>& resources,
      base::OnceClosure callback,
      uint64_t pending_callback_id) override;
  void Shutdown() override;

  // Playback raster source and copy result into |resource|.
  gpu::SyncToken PlaybackAndCopyOnWorkerThread(
      ResourcePool::Backing* backing,
      bool mailbox_texture_is_overlay_candidate,
      const gpu::SyncToken& sync_token,
      const RasterSource* raster_source,
      const gfx::Rect& raster_full_rect,
      const gfx::Rect& raster_dirty_rect,
      const gfx::AxisTransform2d& transform,
      const RasterSource::PlaybackSettings& playback_settings,
      uint64_t previous_content_id,
      uint64_t new_content_id,
      bool& should_destroy_shared_image);

 protected:
  void Flush() override;

 private:
  class RasterBufferImpl : public RasterBuffer {
   public:
    RasterBufferImpl(OneCopyRasterBufferProvider* client,
                     const ResourcePool::InUsePoolResource& in_use_resource,
                     uint64_t previous_content_id);
    RasterBufferImpl(const RasterBufferImpl&) = delete;
    ~RasterBufferImpl() override;

    RasterBufferImpl& operator=(const RasterBufferImpl&) = delete;

    // 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,
                  const GURL& url) override;
    bool SupportsBackgroundThreadPriority() const override;

   private:
    // These fields are safe to access on both the compositor and worker thread.
    const raw_ptr<OneCopyRasterBufferProvider> client_;
    raw_ptr<ResourcePool::Backing> backing_;

    // These fields are for use on the worker thread.
    const uint64_t previous_content_id_;
    gpu::SyncToken before_raster_sync_token_;
    bool mailbox_texture_is_overlay_candidate_;
    // A SyncToken to be returned from the worker thread, and waited on before
    // using the rastered resource.
    gpu::SyncToken after_raster_sync_token_;
    bool should_destroy_shared_image_ = false;
  };

  // Returns true if data has successfully put in the staging buffer.
  bool PlaybackToStagingBuffer(
      StagingBuffer* staging_buffer,
      const RasterSource* raster_source,
      const gfx::Rect& raster_full_rect,
      const gfx::Rect& raster_dirty_rect,
      const gfx::AxisTransform2d& transform,
      viz::SharedImageFormat format,
      const gfx::ColorSpace& dst_color_space,
      const RasterSource::PlaybackSettings& playback_settings,
      uint64_t previous_content_id,
      uint64_t new_content_id);
  gpu::SyncToken CopyOnWorkerThread(StagingBuffer* staging_buffer,
                                    const RasterSource* raster_source,
                                    const gfx::Rect& rect_to_copy,
                                    ResourcePool::Backing* backing,
                                    bool mailbox_texture_is_overlay_candidate,
                                    const gpu::SyncToken& sync_token);

  const scoped_refptr<gpu::SharedImageInterface> sii_;
  const raw_ptr<viz::RasterContextProvider> compositor_context_provider_;
  const raw_ptr<viz::RasterContextProvider> worker_context_provider_;
  const bool use_partial_raster_;
  const bool tile_overlay_candidate_;

  StagingBufferPool staging_pool_;
};

}  // namespace cc

#endif  // CC_RASTER_ONE_COPY_RASTER_BUFFER_PROVIDER_H_