cc: Refactor TileTaskWorkerPool.

cc/raster/zero_copy_tile_task_worker_pool.cc

-// Copyright 2013 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/zero_copy_tile_task_worker_pool.h"
-
-#include <stdint.h>
-
-#include <algorithm>
-
-#include "base/macros.h"
-#include "base/memory/ptr_util.h"
-#include "base/strings/stringprintf.h"
-#include "base/trace_event/trace_event.h"
-#include "base/trace_event/trace_event_argument.h"
-#include "cc/debug/traced_value.h"
-#include "cc/resources/platform_color.h"
-#include "cc/resources/resource.h"
-#include "ui/gfx/buffer_format_util.h"
-#include "ui/gfx/gpu_memory_buffer.h"
-
-namespace cc {
-namespace {
-
-class RasterBufferImpl : public RasterBuffer {
- public:
-  RasterBufferImpl(ResourceProvider* resource_provider,
-                   const Resource* resource)
-      : lock_(resource_provider, resource->id()), resource_(resource) {}
-
-  // 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,
-      float scale,
-      const RasterSource::PlaybackSettings& playback_settings) override {
-    gfx::GpuMemoryBuffer* buffer = lock_.GetGpuMemoryBuffer();
-    if (!buffer)
-      return;
-
-    DCHECK_EQ(1u, gfx::NumberOfPlanesForBufferFormat(buffer->GetFormat()));
-    bool rv = buffer->Map();
-    DCHECK(rv);
-    DCHECK(buffer->memory(0));
-    // TileTaskWorkerPool::PlaybackToMemory only supports unsigned strides.
-    DCHECK_GE(buffer->stride(0), 0);
-
-    // TODO(danakj): Implement partial raster with raster_dirty_rect.
-    TileTaskWorkerPool::PlaybackToMemory(
-        buffer->memory(0), resource_->format(), resource_->size(),
-        buffer->stride(0), raster_source, raster_full_rect, raster_full_rect,
-        scale, playback_settings);
-    buffer->Unmap();
-  }
-
- private:
-  ResourceProvider::ScopedWriteLockGpuMemoryBuffer lock_;
-  const Resource* resource_;
-
-  DISALLOW_COPY_AND_ASSIGN(RasterBufferImpl);
-};
-
-}  // namespace
-
-// static
-std::unique_ptr<TileTaskWorkerPool> ZeroCopyTileTaskWorkerPool::Create(
-    base::SequencedTaskRunner* task_runner,
-    TaskGraphRunner* task_graph_runner,
-    ResourceProvider* resource_provider,
-    ResourceFormat preferred_tile_format) {
-  return base::WrapUnique<TileTaskWorkerPool>(
-      new ZeroCopyTileTaskWorkerPool(task_runner, task_graph_runner,
-                                     resource_provider, preferred_tile_format));
-}
-
-ZeroCopyTileTaskWorkerPool::ZeroCopyTileTaskWorkerPool(
-    base::SequencedTaskRunner* task_runner,
-    TaskGraphRunner* task_graph_runner,
-    ResourceProvider* resource_provider,
-    ResourceFormat preferred_tile_format)
-    : task_runner_(task_runner),
-      task_graph_runner_(task_graph_runner),
-      namespace_token_(task_graph_runner->GetNamespaceToken()),
-      resource_provider_(resource_provider),
-      preferred_tile_format_(preferred_tile_format) {}
-
-ZeroCopyTileTaskWorkerPool::~ZeroCopyTileTaskWorkerPool() {
-}
-
-void ZeroCopyTileTaskWorkerPool::Shutdown() {
-  TRACE_EVENT0("cc", "ZeroCopyTileTaskWorkerPool::Shutdown");
-
-  TaskGraph empty;
-  task_graph_runner_->ScheduleTasks(namespace_token_, &empty);
-  task_graph_runner_->WaitForTasksToFinishRunning(namespace_token_);
-}
-
-void ZeroCopyTileTaskWorkerPool::ScheduleTasks(TaskGraph* graph) {
-  TRACE_EVENT0("cc", "ZeroCopyTileTaskWorkerPool::ScheduleTasks");
-
-  ScheduleTasksOnOriginThread(this, graph);
-  task_graph_runner_->ScheduleTasks(namespace_token_, graph);
-}
-
-void ZeroCopyTileTaskWorkerPool::CheckForCompletedTasks() {
-  TRACE_EVENT0("cc", "ZeroCopyTileTaskWorkerPool::CheckForCompletedTasks");
-
-  task_graph_runner_->CollectCompletedTasks(namespace_token_,
-                                            &completed_tasks_);
-  for (Task::Vector::const_iterator it = completed_tasks_.begin();
-       it != completed_tasks_.end(); ++it) {
-    TileTask* task = static_cast<TileTask*>(it->get());
-
-    task->WillComplete();
-    task->CompleteOnOriginThread(this);
-    task->DidComplete();
-  }
-  completed_tasks_.clear();
-}
-
-ResourceFormat ZeroCopyTileTaskWorkerPool::GetResourceFormat(
-    bool must_support_alpha) const {
-  if (resource_provider_->IsResourceFormatSupported(preferred_tile_format_) &&
-      (DoesResourceFormatSupportAlpha(preferred_tile_format_) ||
-       !must_support_alpha)) {
-    return preferred_tile_format_;
-  }
-
-  return resource_provider_->best_texture_format();
-}
-
-bool ZeroCopyTileTaskWorkerPool::GetResourceRequiresSwizzle(
-    bool must_support_alpha) const {
-  return ResourceFormatRequiresSwizzle(GetResourceFormat(must_support_alpha));
-}
-
-RasterBufferProvider* ZeroCopyTileTaskWorkerPool::AsRasterBufferProvider() {
-  return this;
-}
-
-std::unique_ptr<RasterBuffer>
-ZeroCopyTileTaskWorkerPool::AcquireBufferForRaster(
-    const Resource* resource,
-    uint64_t resource_content_id,
-    uint64_t previous_content_id) {
-  return base::WrapUnique<RasterBuffer>(
-      new RasterBufferImpl(resource_provider_, resource));
-}
-
-void ZeroCopyTileTaskWorkerPool::ReleaseBufferForRaster(
-    std::unique_ptr<RasterBuffer> buffer) {
-  // Nothing to do here. RasterBufferImpl destructor cleans up after itself.
-}
-
-}  // namespace cc