gpu/command_buffer/service/image_factory.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "gpu/command_buffer/service/image_factory.h"
   6
   7 #include "ui/gl/gl_bindings.h"
   8
   9 namespace gpu {
  10
  11 ImageFactory::ImageFactory() {
  12 }
  13
  14 ImageFactory::~ImageFactory() {
  15 }
  16
  17 // static
  18 gfx::GpuMemoryBuffer::Format ImageFactory::ImageFormatToGpuMemoryBufferFormat(
  19     unsigned internalformat) {
  20   switch (internalformat) {
  21     case GL_RGB:
  22       return gfx::GpuMemoryBuffer::RGBX_8888;
  23     case GL_RGBA:
  24       return gfx::GpuMemoryBuffer::RGBA_8888;
  25     default:
  26       NOTREACHED();
  27       return gfx::GpuMemoryBuffer::RGBA_8888;
  28   }
  29 }
  30
  31 // static
  32 gfx::GpuMemoryBuffer::Usage ImageFactory::ImageUsageToGpuMemoryBufferUsage(
  33     unsigned usage) {
  34   switch (usage) {
  35     case GL_MAP_CHROMIUM:
  36       return gfx::GpuMemoryBuffer::MAP;
  37     case GL_SCANOUT_CHROMIUM:
  38       return gfx::GpuMemoryBuffer::SCANOUT;
  39     default:
  40       NOTREACHED();
  41       return gfx::GpuMemoryBuffer::MAP;
  42   }
  43 }
  44
  45 // static
  46 bool ImageFactory::IsImageFormatCompatibleWithGpuMemoryBufferFormat(
  47     unsigned internalformat,
  48     gfx::GpuMemoryBuffer::Format format) {
  49   switch (internalformat) {
  50     case GL_RGB:
  51       switch (format) {
  52         case gfx::GpuMemoryBuffer::RGBX_8888:
  53           return true;
  54         case gfx::GpuMemoryBuffer::RGBA_8888:
  55         case gfx::GpuMemoryBuffer::BGRA_8888:
  56           return false;
  57       }
  58       NOTREACHED();
  59       return false;
  60     case GL_RGBA:
  61       switch (format) {
  62         case gfx::GpuMemoryBuffer::RGBX_8888:
  63           return false;
  64         case gfx::GpuMemoryBuffer::RGBA_8888:
  65         case gfx::GpuMemoryBuffer::BGRA_8888:
  66           return true;
  67       }
  68       NOTREACHED();
  69       return false;
  70     default:
  71       NOTREACHED();
  72       return false;
  73   }
  74 }
  75
  76 }  // namespace gpu