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 "gpu/command_buffer/common/capabilities.h"
   8 #include "ui/gl/gl_bindings.h"
   9
  10 namespace gpu {
  11
  12 ImageFactory::ImageFactory() {
  13 }
  14
  15 ImageFactory::~ImageFactory() {
  16 }
  17
  18 // static
  19 gfx::GpuMemoryBuffer::Format ImageFactory::ImageFormatToGpuMemoryBufferFormat(
  20     unsigned internalformat) {
  21   switch (internalformat) {
  22     case GL_RGB:
  23       return gfx::GpuMemoryBuffer::RGBX_8888;
  24     case GL_RGBA:
  25       return gfx::GpuMemoryBuffer::RGBA_8888;
  26     case GL_BGRA_EXT:
  27       return gfx::GpuMemoryBuffer::BGRA_8888;
  28     case GL_ATC_RGB_AMD:
  29       return gfx::GpuMemoryBuffer::ATC;
  30     case GL_ATC_RGBA_INTERPOLATED_ALPHA_AMD:
  31       return gfx::GpuMemoryBuffer::ATCIA;
  32     case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
  33       return gfx::GpuMemoryBuffer::DXT1;
  34     case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
  35       return gfx::GpuMemoryBuffer::DXT5;
  36     case GL_ETC1_RGB8_OES:
  37       return gfx::GpuMemoryBuffer::ETC1;
  38     default:
  39       NOTREACHED();
  40       return gfx::GpuMemoryBuffer::RGBA_8888;
  41   }
  42 }
  43
  44 // static
  45 gfx::GpuMemoryBuffer::Usage ImageFactory::ImageUsageToGpuMemoryBufferUsage(
  46     unsigned usage) {
  47   switch (usage) {
  48     case GL_MAP_CHROMIUM:
  49       return gfx::GpuMemoryBuffer::MAP;
  50     case GL_SCANOUT_CHROMIUM:
  51       return gfx::GpuMemoryBuffer::SCANOUT;
  52     default:
  53       NOTREACHED();
  54       return gfx::GpuMemoryBuffer::MAP;
  55   }
  56 }
  57
  58 // static
  59 bool ImageFactory::IsImageFormatCompatibleWithGpuMemoryBufferFormat(
  60     unsigned internalformat,
  61     gfx::GpuMemoryBuffer::Format format) {
  62   return ImageFormatToGpuMemoryBufferFormat(internalformat) == format;
  63 }
  64
  65 // static
  66 bool ImageFactory::IsGpuMemoryBufferFormatSupported(
  67     gfx::GpuMemoryBuffer::Format format,
  68     const gpu::Capabilities& capabilities) {
  69   switch (format) {
  70     case gfx::GpuMemoryBuffer::ATC:
  71     case gfx::GpuMemoryBuffer::ATCIA:
  72       return capabilities.texture_format_atc;
  73     case gfx::GpuMemoryBuffer::BGRA_8888:
  74       return capabilities.texture_format_bgra8888;
  75     case gfx::GpuMemoryBuffer::DXT1:
  76       return capabilities.texture_format_dxt1;
  77     case gfx::GpuMemoryBuffer::DXT5:
  78       return capabilities.texture_format_dxt5;
  79     case gfx::GpuMemoryBuffer::ETC1:
  80       return capabilities.texture_format_etc1;
  81     case gfx::GpuMemoryBuffer::RGBA_8888:
  82     case gfx::GpuMemoryBuffer::RGBX_8888:
  83       return true;
  84   }
  85
  86   NOTREACHED();
  87   return false;
  88 }
  89
  90 // static
  91 bool ImageFactory::IsImageSizeValidForGpuMemoryBufferFormat(
  92     const gfx::Size& size,
  93     gfx::GpuMemoryBuffer::Format format) {
  94   switch (format) {
  95     case gfx::GpuMemoryBuffer::ATC:
  96     case gfx::GpuMemoryBuffer::ATCIA:
  97     case gfx::GpuMemoryBuffer::DXT1:
  98     case gfx::GpuMemoryBuffer::DXT5:
  99     case gfx::GpuMemoryBuffer::ETC1:
 100       // Compressed images must have a width and height that's evenly divisible
 101       // by the block size.
 102       return size.width() % 4 == 0 && size.height() % 4 == 0;
 103     case gfx::GpuMemoryBuffer::RGBA_8888:
 104     case gfx::GpuMemoryBuffer::BGRA_8888:
 105     case gfx::GpuMemoryBuffer::RGBX_8888:
 106       return true;
 107   }
 108
 109   NOTREACHED();
 110   return false;
 111 }
 112
 113 }  // namespace gpu