content/common/gpu/client/gpu_memory_buffer_impl_io_surface.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_io_surface.h"
   6
   7 #include "base/logging.h"
   8
   9 namespace content {
  10
  11 GpuMemoryBufferImplIOSurface::GpuMemoryBufferImplIOSurface(
  12     gfx::GpuMemoryBufferId id,
  13     const gfx::Size& size,
  14     Format format,
  15     const DestructionCallback& callback,
  16     IOSurfaceRef io_surface)
  17     : GpuMemoryBufferImpl(id, size, format, callback), io_surface_(io_surface) {
  18 }
  19
  20 GpuMemoryBufferImplIOSurface::~GpuMemoryBufferImplIOSurface() {
  21 }
  22
  23 // static
  24 scoped_ptr<GpuMemoryBufferImpl> GpuMemoryBufferImplIOSurface::CreateFromHandle(
  25     const gfx::GpuMemoryBufferHandle& handle,
  26     const gfx::Size& size,
  27     Format format,
  28     const DestructionCallback& callback) {
  29   base::ScopedCFTypeRef<IOSurfaceRef> io_surface(
  30       IOSurfaceLookup(handle.io_surface_id));
  31   if (!io_surface)
  32     return scoped_ptr<GpuMemoryBufferImpl>();
  33
  34   return make_scoped_ptr<GpuMemoryBufferImpl>(new GpuMemoryBufferImplIOSurface(
  35       handle.id, size, format, callback, io_surface.release()));
  36 }
  37
  38 bool GpuMemoryBufferImplIOSurface::Map(void** data) {
  39   DCHECK(!mapped_);
  40   IOSurfaceLock(io_surface_, 0, NULL);
  41   mapped_ = true;
  42   *data = IOSurfaceGetBaseAddress(io_surface_);
  43   return true;
  44 }
  45
  46 void GpuMemoryBufferImplIOSurface::Unmap() {
  47   DCHECK(mapped_);
  48   IOSurfaceUnlock(io_surface_, 0, NULL);
  49   mapped_ = false;
  50 }
  51
  52 void GpuMemoryBufferImplIOSurface::GetStride(int* stride) const {
  53   *stride = IOSurfaceGetBytesPerRow(io_surface_);
  54 }
  55
  56 gfx::GpuMemoryBufferHandle GpuMemoryBufferImplIOSurface::GetHandle() const {
  57   gfx::GpuMemoryBufferHandle handle;
  58   handle.type = gfx::IO_SURFACE_BUFFER;
  59   handle.id = id_;
  60   handle.io_surface_id = IOSurfaceGetID(io_surface_);
  61   return handle;
  62 }
  63
  64 }  // namespace content