content/common/gpu/client/gpu_memory_buffer_impl.cc

   1 // Copyright 2013 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 "content/common/gpu/client/gpu_memory_buffer_impl.h"
   6
   7 #include "ui/gl/gl_bindings.h"
   8
   9 namespace content {
  10
  11 GpuMemoryBufferImpl::GpuMemoryBufferImpl(const gfx::Size& size,
  12                                          unsigned internalformat)
  13     : size_(size), internalformat_(internalformat), mapped_(false) {
  14   DCHECK(IsFormatValid(internalformat));
  15 }
  16
  17 GpuMemoryBufferImpl::~GpuMemoryBufferImpl() {}
  18
  19 // static
  20 bool GpuMemoryBufferImpl::IsFormatValid(unsigned internalformat) {
  21   switch (internalformat) {
  22     case GL_BGRA8_EXT:
  23     case GL_RGBA8_OES:
  24       return true;
  25     default:
  26       return false;
  27   }
  28 }
  29
  30 // static
  31 bool GpuMemoryBufferImpl::IsUsageValid(unsigned usage) {
  32   switch (usage) {
  33     case GL_IMAGE_MAP_CHROMIUM:
  34     case GL_IMAGE_SCANOUT_CHROMIUM:
  35       return true;
  36     default:
  37       return false;
  38   }
  39 }
  40
  41 // static
  42 size_t GpuMemoryBufferImpl::BytesPerPixel(unsigned internalformat) {
  43   switch (internalformat) {
  44     case GL_BGRA8_EXT:
  45     case GL_RGBA8_OES:
  46       return 4;
  47     default:
  48       NOTREACHED();
  49       return 0;
  50   }
  51 }
  52
  53 bool GpuMemoryBufferImpl::IsMapped() const { return mapped_; }
  54
  55 }  // namespace content