Add better support for RGBA_4444 textures.

gpu/command_buffer/service/image_factory.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 "gpu/command_buffer/service/image_factory.h"
 
 #include "gpu/command_buffer/common/capabilities.h"
 #include "ui/gl/gl_bindings.h"
 
 namespace gpu {
@@ skipping 45 matching lines @@
     default:
       NOTREACHED();
       return gfx::BufferUsage::MAP;
   }
 }
 
 // static
 bool ImageFactory::IsImageFormatCompatibleWithGpuMemoryBufferFormat(
     unsigned internalformat,
     gfx::BufferFormat format) {
-  return ImageFormatToGpuMemoryBufferFormat(internalformat) == format;
+  switch (format) {
+    case gfx::BufferFormat::ATC:
+    case gfx::BufferFormat::ATCIA:
+    case gfx::BufferFormat::BGRA_8888:
+    case gfx::BufferFormat::DXT1:
+    case gfx::BufferFormat::DXT5:
+    case gfx::BufferFormat::ETC1:
+    case gfx::BufferFormat::R_8:
+    case gfx::BufferFormat::RGBA_8888:
+    case gfx::BufferFormat::RGBX_8888:
+    case gfx::BufferFormat::YUV_420:
+      return ImageFormatToGpuMemoryBufferFormat(internalformat) == format;
+    case gfx::BufferFormat::RGBA_4444:
+      return internalformat == GL_RGBA;
+    case gfx::BufferFormat::YUV_420_BIPLANAR:
+      return false;
+  }
+
+  NOTREACHED();
+  return false;
 }
 
 // static
 bool ImageFactory::IsGpuMemoryBufferFormatSupported(
     gfx::BufferFormat format,
     const gpu::Capabilities& capabilities) {
   switch (format) {
     case gfx::BufferFormat::ATC:
     case gfx::BufferFormat::ATCIA:
       return capabilities.texture_format_atc;
@@ skipping 42 matching lines @@
     case gfx::BufferFormat::YUV_420_BIPLANAR:
       // U and V planes are subsampled by a factor of 2.
       return size.width() % 2 == 0 && size.height() % 2 == 0;
   }
 
   NOTREACHED();
   return false;
 }
 
 }  // namespace gpu