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 "base/numerics/safe_conversions.h"
   9 #include "ui/gfx/buffer_format_util.h"
  10 #include "ui/gfx/gpu_memory_buffer.h"
  11
  12 namespace cc {
  13 namespace {
  14
  15 class GpuMemoryBufferImpl : public gfx::GpuMemoryBuffer {
  16  public:
  17   GpuMemoryBufferImpl(const gfx::Size& size,
  18                       gfx::BufferFormat format,
  19                       scoped_ptr<base::SharedMemory> shared_memory)
  20       : size_(size),
  21         format_(format),
  22         shared_memory_(shared_memory.Pass()),
  23         mapped_(false) {}
  24
  25   // Overridden from gfx::GpuMemoryBuffer:
  26   bool Map(void** data) override {
  27     DCHECK(!mapped_);
  28     if (!shared_memory_->Map(gfx::BufferSizeForBufferFormat(size_, format_)))
  29       return false;
  30     mapped_ = true;
  31     size_t offset = 0;
  32     int num_planes =
  33         static_cast<int>(gfx::NumberOfPlanesForBufferFormat(format_));
  34     for (int i = 0; i < num_planes; ++i) {
  35       data[i] = reinterpret_cast<uint8*>(shared_memory_->memory()) + offset;
  36       offset +=
  37           gfx::RowSizeForBufferFormat(size_.width(), format_, i) *
  38           (size_.height() / gfx::SubsamplingFactorForBufferFormat(format_, i));
  39     }
  40     return true;
  41   }
  42   void Unmap() override {
  43     DCHECK(mapped_);
  44     shared_memory_->Unmap();
  45     mapped_ = false;
  46   }
  47   bool IsMapped() const override { return mapped_; }
  48   gfx::BufferFormat GetFormat() const override { return format_; }
  49   void GetStride(int* stride) const override {
  50     int num_planes =
  51         static_cast<int>(gfx::NumberOfPlanesForBufferFormat(format_));
  52     for (int i = 0; i < num_planes; ++i)
  53       stride[i] = base::checked_cast<int>(
  54           gfx::RowSizeForBufferFormat(size_.width(), format_, i));
  55   }
  56   gfx::GpuMemoryBufferId GetId() const override {
  57     NOTREACHED();
  58     return gfx::GpuMemoryBufferId(0);
  59   }
  60   gfx::GpuMemoryBufferHandle GetHandle() const override {
  61     gfx::GpuMemoryBufferHandle handle;
  62     handle.type = gfx::SHARED_MEMORY_BUFFER;
  63     handle.handle = shared_memory_->handle();
  64     return handle;
  65   }
  66   ClientBuffer AsClientBuffer() override {
  67     return reinterpret_cast<ClientBuffer>(this);
  68   }
  69
  70  private:
  71   const gfx::Size size_;
  72   gfx::BufferFormat format_;
  73   scoped_ptr<base::SharedMemory> shared_memory_;
  74   bool mapped_;
  75 };
  76
  77 }  // namespace
  78
  79 TestGpuMemoryBufferManager::TestGpuMemoryBufferManager() {
  80 }
  81
  82 TestGpuMemoryBufferManager::~TestGpuMemoryBufferManager() {
  83 }
  84
  85 scoped_ptr<gfx::GpuMemoryBuffer>
  86 TestGpuMemoryBufferManager::AllocateGpuMemoryBuffer(const gfx::Size& size,
  87                                                     gfx::BufferFormat format,
  88                                                     gfx::BufferUsage usage) {
  89   scoped_ptr<base::SharedMemory> shared_memory(new base::SharedMemory);
  90   const size_t buffer_size = gfx::BufferSizeForBufferFormat(size, format);
  91   if (!shared_memory->CreateAnonymous(buffer_size))
  92     return nullptr;
  93   return make_scoped_ptr<gfx::GpuMemoryBuffer>(
  94       new GpuMemoryBufferImpl(size, format, shared_memory.Pass()));
  95 }
  96
  97 gfx::GpuMemoryBuffer*
  98 TestGpuMemoryBufferManager::GpuMemoryBufferFromClientBuffer(
  99     ClientBuffer buffer) {
 100   return reinterpret_cast<gfx::GpuMemoryBuffer*>(buffer);
 101 }
 102
 103 void TestGpuMemoryBufferManager::SetDestructionSyncPoint(
 104     gfx::GpuMemoryBuffer* buffer,
 105     uint32 sync_point) {
 106 }
 107
 108 }  // namespace cc