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_R8:
  23       return gfx::GpuMemoryBuffer::R_8;
  24     case GL_RGB:
  25       return gfx::GpuMemoryBuffer::RGBX_8888;
  26     case GL_RGBA:
  27       return gfx::GpuMemoryBuffer::RGBA_8888;
  28     case GL_BGRA_EXT:
  29       return gfx::GpuMemoryBuffer::BGRA_8888;
  30     case GL_ATC_RGB_AMD:
  31       return gfx::GpuMemoryBuffer::ATC;
  32     case GL_ATC_RGBA_INTERPOLATED_ALPHA_AMD:
  33       return gfx::GpuMemoryBuffer::ATCIA;
  34     case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
  35       return gfx::GpuMemoryBuffer::DXT1;
  36     case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
  37       return gfx::GpuMemoryBuffer::DXT5;
  38     case GL_ETC1_RGB8_OES:
  39       return gfx::GpuMemoryBuffer::ETC1;
  40     case GL_RGB_YUV_420_CHROMIUM:
  41       return gfx::GpuMemoryBuffer::YUV_420;
  42     default:
  43       NOTREACHED();
  44       return gfx::GpuMemoryBuffer::RGBA_8888;
  45   }
  46 }
  47
  48 // static
  49 gfx::GpuMemoryBuffer::Usage ImageFactory::ImageUsageToGpuMemoryBufferUsage(
  50     unsigned usage) {
  51   switch (usage) {
  52     case GL_MAP_CHROMIUM:
  53       return gfx::GpuMemoryBuffer::MAP;
  54     case GL_SCANOUT_CHROMIUM:
  55       return gfx::GpuMemoryBuffer::SCANOUT;
  56     default:
  57       NOTREACHED();
  58       return gfx::GpuMemoryBuffer::MAP;
  59   }
  60 }
  61
  62 // static
  63 bool ImageFactory::IsImageFormatCompatibleWithGpuMemoryBufferFormat(
  64     unsigned internalformat,
  65     gfx::GpuMemoryBuffer::Format format) {
  66   return ImageFormatToGpuMemoryBufferFormat(internalformat) == format;
  67 }
  68
  69 // static
  70 bool ImageFactory::IsGpuMemoryBufferFormatSupported(
  71     gfx::GpuMemoryBuffer::Format format,
  72     const gpu::Capabilities& capabilities) {
  73   switch (format) {
  74     case gfx::GpuMemoryBuffer::ATC:
  75     case gfx::GpuMemoryBuffer::ATCIA:
  76       return capabilities.texture_format_atc;
  77     case gfx::GpuMemoryBuffer::BGRA_8888:
  78       return capabilities.texture_format_bgra8888;
  79     case gfx::GpuMemoryBuffer::DXT1:
  80       return capabilities.texture_format_dxt1;
  81     case gfx::GpuMemoryBuffer::DXT5:
  82       return capabilities.texture_format_dxt5;
  83     case gfx::GpuMemoryBuffer::ETC1:
  84       return capabilities.texture_format_etc1;
  85     case gfx::GpuMemoryBuffer::R_8:
  86       return capabilities.texture_rg;
  87     case gfx::GpuMemoryBuffer::RGBA_8888:
  88     case gfx::GpuMemoryBuffer::RGBX_8888:
  89     case gfx::GpuMemoryBuffer::YUV_420:
  90       return true;
  91   }
  92
  93   NOTREACHED();
  94   return false;
  95 }
  96
  97 // static
  98 bool ImageFactory::IsImageSizeValidForGpuMemoryBufferFormat(
  99     const gfx::Size& size,
 100     gfx::GpuMemoryBuffer::Format format) {
 101   switch (format) {
 102     case gfx::GpuMemoryBuffer::ATC:
 103     case gfx::GpuMemoryBuffer::ATCIA:
 104     case gfx::GpuMemoryBuffer::DXT1:
 105     case gfx::GpuMemoryBuffer::DXT5:
 106     case gfx::GpuMemoryBuffer::ETC1:
 107       // Compressed images must have a width and height that's evenly divisible
 108       // by the block size.
 109       return size.width() % 4 == 0 && size.height() % 4 == 0;
 110     case gfx::GpuMemoryBuffer::R_8:
 111     case gfx::GpuMemoryBuffer::RGBA_8888:
 112     case gfx::GpuMemoryBuffer::BGRA_8888:
 113     case gfx::GpuMemoryBuffer::RGBX_8888:
 114       return true;
 115     case gfx::GpuMemoryBuffer::YUV_420:
 116       // U and V planes are subsampled by a factor of 2.
 117       return size.width() % 2 == 0 && size.height() % 2 == 0;
 118   }
 119
 120   NOTREACHED();
 121   return false;
 122 }
 123
 124 }  // namespace gpu