Raster PictureLayerTiling with fractional translation

cc/raster/one_copy_raster_buffer_provider.cc

 // 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.
 
 #include "cc/raster/one_copy_raster_buffer_provider.h"
 
 #include <stdint.h>
 
 #include <algorithm>
 #include <limits>
@@ skipping 39 matching lines @@
 
 OneCopyRasterBufferProvider::RasterBufferImpl::~RasterBufferImpl() {
   client_->pending_raster_buffers_.erase(this);
 }
 
 void OneCopyRasterBufferProvider::RasterBufferImpl::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 ScaleTranslate2d& transform,
     const RasterSource::PlaybackSettings& playback_settings) {
   TRACE_EVENT0("cc", "OneCopyRasterBuffer::Playback");
   client_->PlaybackAndCopyOnWorkerThread(
       resource_, &lock_, sync_token_, raster_source, raster_full_rect,
-      raster_dirty_rect, scale, playback_settings, previous_content_id_,
+      raster_dirty_rect, transform, playback_settings, previous_content_id_,
       new_content_id);
 }
 
 OneCopyRasterBufferProvider::OneCopyRasterBufferProvider(
     base::SequencedTaskRunner* task_runner,
     ContextProvider* compositor_context_provider,
     ContextProvider* worker_context_provider,
     ResourceProvider* resource_provider,
     int max_copy_texture_chromium_size,
     bool use_partial_raster,
@@ skipping 132 matching lines @@
   pending_raster_buffers_.clear();
 }
 
 void OneCopyRasterBufferProvider::PlaybackAndCopyOnWorkerThread(
     const Resource* resource,
     ResourceProvider::ScopedWriteLockGL* resource_lock,
     const gpu::SyncToken& sync_token,
     const RasterSource* raster_source,
     const gfx::Rect& raster_full_rect,
     const gfx::Rect& raster_dirty_rect,
-    float scale,
+    const ScaleTranslate2d& transform,
     const RasterSource::PlaybackSettings& playback_settings,
     uint64_t previous_content_id,
     uint64_t new_content_id) {
   if (async_worker_context_enabled_) {
     // Early out if sync token is invalid. This happens if the compositor
     // context was lost before ScheduleTasks was called.
     if (!sync_token.HasData())
       return;
     ContextProvider::ScopedContextLock scoped_context(worker_context_provider_);
     gpu::gles2::GLES2Interface* gl = scoped_context.ContextGL();
     DCHECK(gl);
     // Synchronize with compositor.
     gl->WaitSyncTokenCHROMIUM(sync_token.GetConstData());
   }
 
   std::unique_ptr<StagingBuffer> staging_buffer =
       staging_pool_.AcquireStagingBuffer(resource, previous_content_id);
 
   PlaybackToStagingBuffer(
       staging_buffer.get(), resource, raster_source, raster_full_rect,
-      raster_dirty_rect, scale, resource_lock->color_space_for_raster(),
+      raster_dirty_rect, transform, resource_lock->color_space_for_raster(),
       playback_settings, previous_content_id, new_content_id);
 
   CopyOnWorkerThread(staging_buffer.get(), resource_lock, sync_token,
                      raster_source, previous_content_id, new_content_id);
 
   staging_pool_.ReleaseStagingBuffer(std::move(staging_buffer));
 }
 
 void OneCopyRasterBufferProvider::PlaybackToStagingBuffer(
     StagingBuffer* staging_buffer,
     const Resource* resource,
     const RasterSource* raster_source,
     const gfx::Rect& raster_full_rect,
     const gfx::Rect& raster_dirty_rect,
-    float scale,
+    const ScaleTranslate2d& transform,
     const gfx::ColorSpace& dst_color_space,
     const RasterSource::PlaybackSettings& playback_settings,
     uint64_t previous_content_id,
     uint64_t new_content_id) {
   // Allocate GpuMemoryBuffer if necessary. If using partial raster, we
   // must allocate a buffer with BufferUsage CPU_READ_WRITE_PERSISTENT.
   if (!staging_buffer->gpu_memory_buffer) {
     staging_buffer->gpu_memory_buffer =
         resource_provider_->gpu_memory_buffer_manager()->CreateGpuMemoryBuffer(
             staging_buffer->size, BufferFormat(resource->format()),
@@ skipping 29 matching lines @@
     DCHECK(rv);
     DCHECK(buffer->memory(0));
     // RasterBufferProvider::PlaybackToMemory only supports unsigned strides.
     DCHECK_GE(buffer->stride(0), 0);
 
     DCHECK(!playback_rect.IsEmpty())
         << "Why are we rastering a tile that's not dirty?";
     RasterBufferProvider::PlaybackToMemory(
         buffer->memory(0), resource->format(), staging_buffer->size,
         buffer->stride(0), raster_source, raster_full_rect, playback_rect,
-        scale, dst_color_space, playback_settings);
+        transform, dst_color_space, playback_settings);
     buffer->Unmap();
     staging_buffer->content_id = new_content_id;
   }
 }
 
 void OneCopyRasterBufferProvider::CopyOnWorkerThread(
     StagingBuffer* staging_buffer,
     ResourceProvider::ScopedWriteLockGL* resource_lock,
     const gpu::SyncToken& sync_token,
     const RasterSource* raster_source,
@@ skipping 109 matching lines @@
   resource_lock->set_synchronized(!async_worker_context_enabled_);
 }
 
 gfx::BufferUsage OneCopyRasterBufferProvider::StagingBufferUsage() const {
   return use_partial_raster_
              ? gfx::BufferUsage::GPU_READ_CPU_READ_WRITE_PERSISTENT
              : gfx::BufferUsage::GPU_READ_CPU_READ_WRITE;
 }
 
 }  // namespace cc