src/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                                          const DestructionCallback& callback)
  14     : size_(size),
  15       internalformat_(internalformat),
  16       callback_(callback),
  17       mapped_(false) {
  18   DCHECK(IsFormatValid(internalformat));
  19 }
  20
  21 GpuMemoryBufferImpl::~GpuMemoryBufferImpl() {
  22   callback_.Run();
  23 }
  24
  25 // static
  26 bool GpuMemoryBufferImpl::IsFormatValid(unsigned internalformat) {
  27   switch (internalformat) {
  28     case GL_BGRA8_EXT:
  29     case GL_RGBA8_OES:
  30     case GL_RGB8_OES:
  31       return true;
  32     default:
  33       return false;
  34   }
  35 }
  36
  37 // static
  38 bool GpuMemoryBufferImpl::IsUsageValid(unsigned usage) {
  39   switch (usage) {
  40     case GL_IMAGE_MAP_CHROMIUM:
  41     case GL_IMAGE_SCANOUT_CHROMIUM:
  42       return true;
  43     default:
  44       return false;
  45   }
  46 }
  47
  48 // static
  49 size_t GpuMemoryBufferImpl::BytesPerPixel(unsigned internalformat) {
  50   switch (internalformat) {
  51     case GL_BGRA8_EXT:
  52     case GL_RGBA8_OES:
  53     case GL_RGB8_OES:
  54       return 4;
  55     default:
  56       NOTREACHED();
  57       return 0;
  58   }
  59 }
  60
  61 bool GpuMemoryBufferImpl::IsMapped() const { return mapped_; }
  62
  63 }  // namespace content