cc/test/test_gpu_memory_buffer_manager.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 "cc/test/test_gpu_memory_buffer_manager.h"
   6
   7 #include "base/logging.h"
   8 #include "ui/gfx/gpu_memory_buffer.h"
   9
  10 namespace cc {
  11 namespace {
  12
  13 class GpuMemoryBufferImpl : public gfx::GpuMemoryBuffer {
  14  public:
  15   GpuMemoryBufferImpl(const gfx::Size& size, Format format)
  16       : size_(size),
  17         format_(format),
  18         pixels_(new uint8[size.GetArea() * BytesPerPixel(format)]),
  19         mapped_(false) {}
  20
  21   // Overridden from gfx::GpuMemoryBuffer:
  22   virtual void* Map() override {
  23     DCHECK(!mapped_);
  24     mapped_ = true;
  25     return pixels_.get();
  26   }
  27   virtual void Unmap() override {
  28     DCHECK(mapped_);
  29     mapped_ = false;
  30   }
  31   virtual bool IsMapped() const override { return mapped_; }
  32   virtual Format GetFormat() const override { return format_; }
  33   virtual uint32 GetStride() const override {
  34     return size_.width() * BytesPerPixel(format_);
  35   }
  36   virtual gfx::GpuMemoryBufferHandle GetHandle() const override {
  37     NOTREACHED();
  38     return gfx::GpuMemoryBufferHandle();
  39   }
  40   virtual ClientBuffer AsClientBuffer() override {
  41     return reinterpret_cast<ClientBuffer>(this);
  42   }
  43
  44  private:
  45   static size_t BytesPerPixel(Format format) {
  46     switch (format) {
  47       case RGBA_8888:
  48       case RGBX_8888:
  49       case BGRA_8888:
  50         return 4;
  51     }
  52
  53     NOTREACHED();
  54     return 0;
  55   }
  56
  57   const gfx::Size size_;
  58   gfx::GpuMemoryBuffer::Format format_;
  59   scoped_ptr<uint8[]> pixels_;
  60   bool mapped_;
  61 };
  62
  63 }  // namespace
  64
  65 TestGpuMemoryBufferManager::TestGpuMemoryBufferManager() {
  66 }
  67
  68 TestGpuMemoryBufferManager::~TestGpuMemoryBufferManager() {
  69 }
  70
  71 scoped_ptr<gfx::GpuMemoryBuffer>
  72 TestGpuMemoryBufferManager::AllocateGpuMemoryBuffer(
  73     const gfx::Size& size,
  74     gfx::GpuMemoryBuffer::Format format,
  75     gfx::GpuMemoryBuffer::Usage usage) {
  76   return make_scoped_ptr<gfx::GpuMemoryBuffer>(
  77       new GpuMemoryBufferImpl(size, format));
  78 }
  79
  80 gfx::GpuMemoryBuffer*
  81 TestGpuMemoryBufferManager::GpuMemoryBufferFromClientBuffer(
  82     ClientBuffer buffer) {
  83   return reinterpret_cast<gfx::GpuMemoryBuffer*>(buffer);
  84 }
  85
  86 }  // namespace cc