Add multi-planar functions to GpuMemoryBuffer

cc/resources/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/resources/zero_copy_tile_task_worker_pool.h"
 
 #include <algorithm>
 
 #include "base/strings/stringprintf.h"
 #include "base/trace_event/trace_event.h"
@@ skipping 13 matching lines @@
       : lock_(resource_provider, resource->id()), resource_(resource) {}
 
   // Overridden from RasterBuffer:
   void Playback(const RasterSource* raster_source,
                 const gfx::Rect& rect,
                 float scale) override {
     gfx::GpuMemoryBuffer* gpu_memory_buffer = lock_.GetGpuMemoryBuffer();
     if (!gpu_memory_buffer)
       return;
 
-    TileTaskWorkerPool::PlaybackToMemory(
-        gpu_memory_buffer->Map(), resource_->format(), resource_->size(),
-        gpu_memory_buffer->GetStride(), raster_source, rect, scale);
+    size_t num_buffers = gpu_memory_buffer->GetNumberOfPlanes();

[reveman, 2015/03/23 22:24:00]

Same here. No need to support multi-plane formats.

[reveman, 2015/03/23 22:24:01]

Same here. This code can assume one plane.

[emircan, 2015/03/24 16:52:26]

Done.

+    DCHECK_EQ(num_buffers, 1u);
+
+    void* mapped_buffers[num_buffers];
+    bool map_completed = gpu_memory_buffer->Map(mapped_buffers);
+    DCHECK(map_completed);
+
+    uint32 strides[num_buffers];
+    bool getStride_completed = gpu_memory_buffer->GetStride(strides);
+    DCHECK(getStride_completed);
+
+    TileTaskWorkerPool::PlaybackToMemory(mapped_buffers[0], resource_->format(),
+                                         resource_->size(), strides[0],
+                                         raster_source, rect, scale);
     gpu_memory_buffer->Unmap();
   }
 
  private:
   ResourceProvider::ScopedWriteLockGpuMemoryBuffer lock_;
   const Resource* resource_;
 
   DISALLOW_COPY_AND_ASSIGN(RasterBufferImpl);
 };
 
@@ skipping 155 matching lines @@
       new base::trace_event::TracedValue();
 
   state->BeginArray("tasks_pending");
   for (TaskSet task_set = 0; task_set < kNumberOfTaskSets; ++task_set)
     state->AppendBoolean(tasks_pending_[task_set]);
   state->EndArray();
   return state;
 }
 
 }  // namespace cc