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::BufferFormat ImageFactory::DefaultBufferFormatForImageFormat(
  20     unsigned internalformat) {
  21   switch (internalformat) {
  22     case GL_R8:
  23       return gfx::BufferFormat::R_8;
  24     case GL_RGB:
  25       return gfx::BufferFormat::BGRX_8888;
  26     case GL_RGBA:
  27       return gfx::BufferFormat::RGBA_8888;
  28     case GL_BGRA_EXT:
  29       return gfx::BufferFormat::BGRA_8888;
  30     case GL_ATC_RGB_AMD:
  31       return gfx::BufferFormat::ATC;
  32     case GL_ATC_RGBA_INTERPOLATED_ALPHA_AMD:
  33       return gfx::BufferFormat::ATCIA;
  34     case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
  35       return gfx::BufferFormat::DXT1;
  36     case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
  37       return gfx::BufferFormat::DXT5;
  38     case GL_ETC1_RGB8_OES:
  39       return gfx::BufferFormat::ETC1;
  40     case GL_RGB_YUV_420_CHROMIUM:
  41       return gfx::BufferFormat::YUV_420;
  42     default:
  43       NOTREACHED();
  44       return gfx::BufferFormat::RGBA_8888;
  45   }
  46 }
  47
  48 // static
  49 gfx::BufferUsage ImageFactory::ImageUsageToGpuMemoryBufferUsage(
  50     unsigned usage) {
  51   switch (usage) {
  52     case GL_MAP_CHROMIUM:
  53       return gfx::BufferUsage::MAP;
  54     case GL_SCANOUT_CHROMIUM:
  55       return gfx::BufferUsage::SCANOUT;
  56     default:
  57       NOTREACHED();
  58       return gfx::BufferUsage::MAP;
  59   }
  60 }
  61
  62 // static
  63 bool ImageFactory::IsImageFormatCompatibleWithGpuMemoryBufferFormat(
  64     unsigned internalformat,
  65     gfx::BufferFormat format) {
  66   switch (format) {
  67     case gfx::BufferFormat::ATC:
  68     case gfx::BufferFormat::ATCIA:
  69     case gfx::BufferFormat::BGRA_8888:
  70     case gfx::BufferFormat::BGRX_8888:
  71     case gfx::BufferFormat::DXT1:
  72     case gfx::BufferFormat::DXT5:
  73     case gfx::BufferFormat::ETC1:
  74     case gfx::BufferFormat::R_8:
  75     case gfx::BufferFormat::RGBA_8888:
  76     case gfx::BufferFormat::YUV_420:
  77       return format == DefaultBufferFormatForImageFormat(internalformat);
  78     case gfx::BufferFormat::RGBA_4444:
  79       return internalformat == GL_RGBA;
  80     case gfx::BufferFormat::UYVY_422:
  81       return internalformat == GL_RGB;
  82   }
  83
  84   NOTREACHED();
  85   return false;
  86 }
  87
  88 // static
  89 bool ImageFactory::IsGpuMemoryBufferFormatSupported(
  90     gfx::BufferFormat format,
  91     const gpu::Capabilities& capabilities) {
  92   switch (format) {
  93     case gfx::BufferFormat::ATC:
  94     case gfx::BufferFormat::ATCIA:
  95       return capabilities.texture_format_atc;
  96     case gfx::BufferFormat::BGRA_8888:
  97       return capabilities.texture_format_bgra8888;
  98     case gfx::BufferFormat::DXT1:
  99       return capabilities.texture_format_dxt1;
 100     case gfx::BufferFormat::DXT5:
 101       return capabilities.texture_format_dxt5;
 102     case gfx::BufferFormat::ETC1:
 103       return capabilities.texture_format_etc1;
 104     case gfx::BufferFormat::R_8:
 105       return capabilities.texture_rg;
 106     case gfx::BufferFormat::RGBA_4444:
 107     case gfx::BufferFormat::RGBA_8888:
 108     case gfx::BufferFormat::BGRX_8888:
 109     case gfx::BufferFormat::YUV_420:
 110     case gfx::BufferFormat::UYVY_422:
 111       return true;
 112   }
 113
 114   NOTREACHED();
 115   return false;
 116 }
 117
 118 // static
 119 bool ImageFactory::IsImageSizeValidForGpuMemoryBufferFormat(
 120     const gfx::Size& size,
 121     gfx::BufferFormat format) {
 122   switch (format) {
 123     case gfx::BufferFormat::ATC:
 124     case gfx::BufferFormat::ATCIA:
 125     case gfx::BufferFormat::DXT1:
 126     case gfx::BufferFormat::DXT5:
 127     case gfx::BufferFormat::ETC1:
 128       // Compressed images must have a width and height that's evenly divisible
 129       // by the block size.
 130       return size.width() % 4 == 0 && size.height() % 4 == 0;
 131     case gfx::BufferFormat::R_8:
 132     case gfx::BufferFormat::RGBA_4444:
 133     case gfx::BufferFormat::RGBA_8888:
 134     case gfx::BufferFormat::BGRA_8888:
 135     case gfx::BufferFormat::BGRX_8888:
 136       return true;
 137     case gfx::BufferFormat::YUV_420:
 138       // U and V planes are subsampled by a factor of 2.
 139       return size.width() % 2 == 0 && size.height() % 2 == 0;
 140     case gfx::BufferFormat::UYVY_422:
 141       return size.width() % 2 == 0;
 142   }
 143
 144   NOTREACHED();
 145   return false;
 146 }
 147
 148 }  // namespace gpu