Pull gpu CmdBuf service/client shared GpuMemoryBuffer code to common

gpu/command_buffer/common/gpu_memory_buffer_support.cc

-// Copyright 2014 The Chromium Authors. All rights reserved.
+// Copyright 2016 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/gpu_memory_buffer_support.h"
 
+#include "base/logging.h"
 #include "gpu/command_buffer/common/capabilities.h"
 #include "ui/gl/gl_bindings.h"
 
 namespace gpu {
 
 namespace {
+
 gfx::BufferFormat BufferFormatForInternalFormat(unsigned internalformat) {
   switch (internalformat) {
     case GL_RED:
       return gfx::BufferFormat::R_8;
     case GL_RGB:
       return gfx::BufferFormat::BGRX_8888;
     case GL_RGBA:
       return gfx::BufferFormat::RGBA_8888;
     case GL_BGRA_EXT:
       return gfx::BufferFormat::BGRA_8888;
@@ skipping 14 matching lines @@
     case GL_RGB_YCBCR_422_CHROMIUM:
       return gfx::BufferFormat::UYVY_422;
     default:
       NOTREACHED();
       return gfx::BufferFormat::RGBA_8888;
   }
 }
 
 }  // namespace
 
-ImageFactory::ImageFactory() {
-}
-
-ImageFactory::~ImageFactory() {
-}
-
-// static
-gfx::BufferFormat ImageFactory::DefaultBufferFormatForImageFormat(
-    unsigned internalformat) {
+gfx::BufferFormat DefaultBufferFormatForImageFormat(unsigned internalformat) {
   switch (internalformat) {
     case GL_RGB:
       return gfx::BufferFormat::BGRX_8888;
     case GL_RGBA:
       return gfx::BufferFormat::RGBA_8888;
     default:
       NOTREACHED();
       return gfx::BufferFormat::RGBA_8888;
   }
 }
 
-// static
-bool ImageFactory::IsImageFormatCompatibleWithGpuMemoryBufferFormat(
+bool IsImageFormatCompatibleWithGpuMemoryBufferFormat(
     unsigned internalformat,
     gfx::BufferFormat format) {
   switch (format) {
     case gfx::BufferFormat::ATC:
     case gfx::BufferFormat::ATCIA:
     case gfx::BufferFormat::BGRA_8888:
     case gfx::BufferFormat::BGRX_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:
     case gfx::BufferFormat::YUV_420_BIPLANAR:
     case gfx::BufferFormat::UYVY_422:
       return format == BufferFormatForInternalFormat(internalformat);
     case gfx::BufferFormat::RGBA_4444:
       return internalformat == GL_RGBA;
   }
 
   NOTREACHED();
   return false;
 }
 
-// static
-bool ImageFactory::IsGpuMemoryBufferFormatSupported(
-    gfx::BufferFormat format,
-    const gpu::Capabilities& capabilities) {
+bool IsGpuMemoryBufferFormatSupported(gfx::BufferFormat format,
+                                      const gpu::Capabilities& capabilities) {
   switch (format) {
     case gfx::BufferFormat::ATC:
     case gfx::BufferFormat::ATCIA:
       return capabilities.texture_format_atc;
     case gfx::BufferFormat::BGRA_8888:
     case gfx::BufferFormat::BGRX_8888:
       return capabilities.texture_format_bgra8888;
     case gfx::BufferFormat::DXT1:
       return capabilities.texture_format_dxt1;
     case gfx::BufferFormat::DXT5:
@@ skipping 10 matching lines @@
     case gfx::BufferFormat::YUV_420:
       return true;
     case gfx::BufferFormat::YUV_420_BIPLANAR:
       return capabilities.image_ycbcr_420v;
   }
 
   NOTREACHED();
   return false;
 }
 
-// static
-bool ImageFactory::IsImageSizeValidForGpuMemoryBufferFormat(
-    const gfx::Size& size,
-    gfx::BufferFormat format) {
+bool IsImageSizeValidForGpuMemoryBufferFormat(const gfx::Size& size,
+                                              gfx::BufferFormat format) {
   switch (format) {
     case gfx::BufferFormat::ATC:
     case gfx::BufferFormat::ATCIA:
     case gfx::BufferFormat::DXT1:
     case gfx::BufferFormat::DXT5:
     case gfx::BufferFormat::ETC1:
       // Compressed images must have a width and height that's evenly divisible
       // by the block size.
       return size.width() % 4 == 0 && size.height() % 4 == 0;
     case gfx::BufferFormat::R_8:
     case gfx::BufferFormat::RGBA_4444:
     case gfx::BufferFormat::RGBA_8888:
     case gfx::BufferFormat::RGBX_8888:
     case gfx::BufferFormat::BGRA_8888:
     case gfx::BufferFormat::BGRX_8888:
       return true;
     case gfx::BufferFormat::YUV_420:
     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;
     case gfx::BufferFormat::UYVY_422:
       return size.width() % 2 == 0;
   }
 
   NOTREACHED();
   return false;
 }
 
 }  // namespace gpu