Add R_8 GPU memory buffers format.

cc/test/test_gpu_memory_buffer_manager.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/test/test_gpu_memory_buffer_manager.h"
 
 #include "base/logging.h"
 #include "ui/gfx/gpu_memory_buffer.h"
 
 namespace cc {
 namespace {
 
 size_t NumberOfPlanesForGpuMemoryBufferFormat(
     gfx::GpuMemoryBuffer::Format format) {
   switch (format) {
     case gfx::GpuMemoryBuffer::Format::ATC:
     case gfx::GpuMemoryBuffer::Format::ATCIA:
     case gfx::GpuMemoryBuffer::Format::DXT1:
     case gfx::GpuMemoryBuffer::Format::DXT5:
     case gfx::GpuMemoryBuffer::Format::ETC1:
+    case gfx::GpuMemoryBuffer::Format::R_8:
     case gfx::GpuMemoryBuffer::Format::RGBA_8888:
     case gfx::GpuMemoryBuffer::Format::RGBX_8888:
     case gfx::GpuMemoryBuffer::Format::BGRA_8888:
       return 1;
     case gfx::GpuMemoryBuffer::Format::YUV_420:
       return 3;
   }
   NOTREACHED();
   return 0;
 }
 
 size_t SubsamplingFactor(gfx::GpuMemoryBuffer::Format format, int plane) {
   switch (format) {
     case gfx::GpuMemoryBuffer::ATC:
     case gfx::GpuMemoryBuffer::ATCIA:
     case gfx::GpuMemoryBuffer::DXT1:
     case gfx::GpuMemoryBuffer::DXT5:
     case gfx::GpuMemoryBuffer::ETC1:
+    case gfx::GpuMemoryBuffer::R_8:
     case gfx::GpuMemoryBuffer::RGBA_8888:
     case gfx::GpuMemoryBuffer::RGBX_8888:
     case gfx::GpuMemoryBuffer::BGRA_8888:
       return 1;
     case gfx::GpuMemoryBuffer::YUV_420: {
       static size_t factor[] = {1, 2, 2};
       DCHECK_LT(static_cast<size_t>(plane), arraysize(factor));
       return factor[plane];
     }
   }
   NOTREACHED();
   return 0;
 }
 
 size_t StrideInBytes(size_t width,
                      gfx::GpuMemoryBuffer::Format format,
                      int plane) {
   switch (format) {
     case gfx::GpuMemoryBuffer::ATCIA:
     case gfx::GpuMemoryBuffer::DXT5:
       DCHECK_EQ(plane, 0);
       return width;
     case gfx::GpuMemoryBuffer::ATC:
     case gfx::GpuMemoryBuffer::DXT1:
     case gfx::GpuMemoryBuffer::ETC1:
       DCHECK_EQ(plane, 0);
       DCHECK_EQ(width % 2, 0U);
       return width / 2;
+    case gfx::GpuMemoryBuffer::R_8:
+      return (width + 3) & ~0x3;
     case gfx::GpuMemoryBuffer::RGBA_8888:
     case gfx::GpuMemoryBuffer::RGBX_8888:
     case gfx::GpuMemoryBuffer::BGRA_8888:
       DCHECK_EQ(plane, 0);
       return width * 4;
     case gfx::GpuMemoryBuffer::YUV_420:
       return width / SubsamplingFactor(format, plane);
   }
   NOTREACHED();
   return 0;
@@ skipping 90 matching lines @@
     ClientBuffer buffer) {
   return reinterpret_cast<gfx::GpuMemoryBuffer*>(buffer);
 }
 
 void TestGpuMemoryBufferManager::SetDestructionSyncPoint(
     gfx::GpuMemoryBuffer* buffer,
     uint32 sync_point) {
 }
 
 }  // namespace cc