gpu: Add IOSurface backed GpuMemoryBuffer implementation.

content/common/gpu/client/gpu_memory_buffer_impl.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/common/gpu/client/gpu_memory_buffer_impl.h"
 
 #include "ui/gl/gl_bindings.h"
 
 namespace content {
 
 GpuMemoryBufferImpl::GpuMemoryBufferImpl(
-    scoped_ptr<base::SharedMemory> shared_memory,
-    size_t width,
-    size_t height,
-    unsigned internalformat)
-    : shared_memory_(shared_memory.Pass()),
-      size_(gfx::Size(width, height)),
+    gfx::Size size, unsigned internalformat)
+    : size_(size),
       internalformat_(internalformat),
       mapped_(false) {
-  DCHECK(!shared_memory_->memory());
   DCHECK(IsFormatValid(internalformat));
 }
 
 GpuMemoryBufferImpl::~GpuMemoryBufferImpl() {
 }
 
-void GpuMemoryBufferImpl::Map(AccessMode mode, void** vaddr) {
-  DCHECK(!mapped_);
-  *vaddr = NULL;
-  if (!shared_memory_->Map(size_.GetArea() * BytesPerPixel(internalformat_)))
-    return;
-  *vaddr = shared_memory_->memory();
-  mapped_ = true;
-}
-
-void GpuMemoryBufferImpl::Unmap() {
-  DCHECK(mapped_);
-  shared_memory_->Unmap();
-  mapped_ = false;
-}
-
-bool GpuMemoryBufferImpl::IsMapped() const {
-  return mapped_;
-}
-
-uint32 GpuMemoryBufferImpl::GetStride() const {
-  return size_.width() * BytesPerPixel(internalformat_);
-}
-
-gfx::GpuMemoryBufferHandle GpuMemoryBufferImpl::GetHandle() const {
-  gfx::GpuMemoryBufferHandle handle;
-  handle.type = gfx::SHARED_MEMORY_BUFFER;
-  handle.handle = shared_memory_->handle();
-  return handle;
-}
-
 // static
 bool GpuMemoryBufferImpl::IsFormatValid(unsigned internalformat) {
   switch (internalformat) {
     case GL_BGRA8_EXT:
     case GL_RGBA8_OES:
       return true;
     default:
       return false;
   }
 }
 
 // static
 size_t GpuMemoryBufferImpl::BytesPerPixel(unsigned internalformat) {
   switch (internalformat) {
     case GL_BGRA8_EXT:
     case GL_RGBA8_OES:
       return 4;
     default:
       NOTREACHED();
       return 0;
   }
 }
 
+bool GpuMemoryBufferImpl::IsMapped() const {
+  return mapped_;
+}
+
+uint32 GpuMemoryBufferImpl::GetStride() const {
+  return size_.width() * BytesPerPixel(internalformat_);
+}
+
 }  // namespace content