gpu: Remove Create/DeleteImage IPC by adding an X11_PIXMAP_BUFFER GpuMemoryBuffer type.

content/common/gpu/client/gpu_memory_buffer_impl_shm.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_shm.h"
-
-#include "base/numerics/safe_math.h"
-#include "ui/gl/gl_bindings.h"
-
-namespace content {
-
-GpuMemoryBufferImplShm::GpuMemoryBufferImplShm(const gfx::Size& size,
-                                               unsigned internalformat)
-    : GpuMemoryBufferImpl(size, internalformat) {}
-
-GpuMemoryBufferImplShm::~GpuMemoryBufferImplShm() {}
-
-// static
-void GpuMemoryBufferImplShm::AllocateSharedMemoryForChildProcess(
-    const gfx::Size& size,
-    unsigned internalformat,
-    base::ProcessHandle child_process,
-    const AllocationCallback& callback) {
-  DCHECK(IsLayoutSupported(size, internalformat));
-  gfx::GpuMemoryBufferHandle handle;
-  base::SharedMemory shared_memory;
-  if (!shared_memory.CreateAnonymous(size.GetArea() *
-                                     BytesPerPixel(internalformat))) {
-    handle.type = gfx::EMPTY_BUFFER;
-    return;
-  }
-  handle.type = gfx::SHARED_MEMORY_BUFFER;
-  shared_memory.GiveToProcess(child_process, &handle.handle);
-  callback.Run(handle);
-}
-
-// static
-bool GpuMemoryBufferImplShm::IsLayoutSupported(const gfx::Size& size,
-                                               unsigned internalformat) {
-  base::CheckedNumeric<int> buffer_size = size.width();
-  buffer_size *= size.height();
-  buffer_size *= BytesPerPixel(internalformat);
-  return buffer_size.IsValid();
-}
-
-// static
-bool GpuMemoryBufferImplShm::IsUsageSupported(unsigned usage) {
-  switch (usage) {
-    case GL_IMAGE_MAP_CHROMIUM:
-      return true;
-    default:
-      return false;
-  }
-}
-
-// static
-bool GpuMemoryBufferImplShm::IsConfigurationSupported(const gfx::Size& size,
-                                                      unsigned internalformat,
-                                                      unsigned usage) {
-  return IsLayoutSupported(size, internalformat) && IsUsageSupported(usage);
-}
-
-bool GpuMemoryBufferImplShm::Initialize() {
-  DCHECK(IsLayoutSupported(size_, internalformat_));
-  scoped_ptr<base::SharedMemory> shared_memory(new base::SharedMemory());
-  if (!shared_memory->CreateAnonymous(size_.GetArea() *
-                                      BytesPerPixel(internalformat_)))
-    return false;
-  shared_memory_ = shared_memory.Pass();
-  DCHECK(!shared_memory_->memory());
-  return true;
-}
-
-bool GpuMemoryBufferImplShm::InitializeFromHandle(
-    gfx::GpuMemoryBufferHandle handle) {
-  DCHECK(IsLayoutSupported(size_, internalformat_));
-  if (!base::SharedMemory::IsHandleValid(handle.handle))
-    return false;
-  shared_memory_.reset(new base::SharedMemory(handle.handle, false));
-  DCHECK(!shared_memory_->memory());
-  return true;
-}
-
-void* GpuMemoryBufferImplShm::Map() {
-  DCHECK(!mapped_);
-  if (!shared_memory_->Map(size_.GetArea() * BytesPerPixel(internalformat_)))
-    return NULL;
-  mapped_ = true;
-  return shared_memory_->memory();
-}
-
-void GpuMemoryBufferImplShm::Unmap() {
-  DCHECK(mapped_);
-  shared_memory_->Unmap();
-  mapped_ = false;
-}
-
-uint32 GpuMemoryBufferImplShm::GetStride() const {
-  return size_.width() * BytesPerPixel(internalformat_);
-}
-
-gfx::GpuMemoryBufferHandle GpuMemoryBufferImplShm::GetHandle() const {
-  gfx::GpuMemoryBufferHandle handle;
-  handle.type = gfx::SHARED_MEMORY_BUFFER;
-  handle.handle = shared_memory_->handle();
-  return handle;
-}
-
-}  // namespace content