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     case GL_ATC_RGB_AMD:
  26       return gfx::GpuMemoryBuffer::ATC;
  27     case GL_ATC_RGBA_INTERPOLATED_ALPHA_AMD:
  28       return gfx::GpuMemoryBuffer::ATCIA;
  29     case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
  30       return gfx::GpuMemoryBuffer::DXT1;
  31     case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
  32       return gfx::GpuMemoryBuffer::DXT5;
  33     case GL_ETC1_RGB8_OES:
  34       return gfx::GpuMemoryBuffer::ETC1;
  35     default:
  36       NOTREACHED();
  37       return gfx::GpuMemoryBuffer::RGBA_8888;
  38   }
  39 }
  40
  41 // static
  42 gfx::GpuMemoryBuffer::Usage ImageFactory::ImageUsageToGpuMemoryBufferUsage(
  43     unsigned usage) {
  44   switch (usage) {
  45     case GL_MAP_CHROMIUM:
  46       return gfx::GpuMemoryBuffer::MAP;
  47     case GL_SCANOUT_CHROMIUM:
  48       return gfx::GpuMemoryBuffer::SCANOUT;
  49     default:
  50       NOTREACHED();
  51       return gfx::GpuMemoryBuffer::MAP;
  52   }
  53 }
  54
  55 // static
  56 bool ImageFactory::IsImageFormatCompatibleWithGpuMemoryBufferFormat(
  57     unsigned internalformat,
  58     gfx::GpuMemoryBuffer::Format format) {
  59   switch (internalformat) {
  60     case GL_RGB:
  61       switch (format) {
  62         case gfx::GpuMemoryBuffer::ATC:
  63         case gfx::GpuMemoryBuffer::ATCIA:
  64         case gfx::GpuMemoryBuffer::DXT1:
  65         case gfx::GpuMemoryBuffer::DXT5:
  66         case gfx::GpuMemoryBuffer::ETC1:
  67         case gfx::GpuMemoryBuffer::RGBX_8888:
  68           return true;
  69         case gfx::GpuMemoryBuffer::RGBA_8888:
  70         case gfx::GpuMemoryBuffer::BGRA_8888:
  71           return false;
  72       }
  73       NOTREACHED();
  74       return false;
  75     case GL_RGBA:
  76       switch (format) {
  77         case gfx::GpuMemoryBuffer::RGBX_8888:
  78           return false;
  79         case gfx::GpuMemoryBuffer::ATC:
  80         case gfx::GpuMemoryBuffer::ATCIA:
  81         case gfx::GpuMemoryBuffer::DXT1:
  82         case gfx::GpuMemoryBuffer::DXT5:
  83         case gfx::GpuMemoryBuffer::ETC1:
  84         case gfx::GpuMemoryBuffer::RGBA_8888:
  85         case gfx::GpuMemoryBuffer::BGRA_8888:
  86           return true;
  87       }
  88       NOTREACHED();
  89       return false;
  90     default:
  91       NOTREACHED();
  92       return false;
  93   }
  94 }
  95
  96 }  // namespace gpu