Scan-out capable buffers (aka ui::NativePixmap) for Mus

components/mus/gles2/mojo_gpu_memory_buffer.cc

 // Copyright 2015 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 "components/mus/gles2/mojo_gpu_memory_buffer.h"
 
 #include <stdint.h>
 
 #include "base/logging.h"
 #include "base/memory/shared_memory.h"
 #include "base/numerics/safe_conversions.h"
 #include "build/build_config.h"
 #include "ui/gfx/buffer_format_util.h"
 
 namespace mus {
 
 MojoGpuMemoryBufferImpl::MojoGpuMemoryBufferImpl(
     const gfx::Size& size,
     gfx::BufferFormat format,
     scoped_ptr<base::SharedMemory> shared_memory)
-    : size_(size),
-      format_(format),
-      shared_memory_(std::move(shared_memory)),
-      mapped_(false) {}
+    : GpuMemoryBufferImpl(gfx::GenericSharedMemoryId(0), size, format),
+      shared_memory_(std::move(shared_memory)) {}
 
+// TODO(rjkroege): Support running a destructor callback as necessary.
 MojoGpuMemoryBufferImpl::~MojoGpuMemoryBufferImpl() {}
 
 scoped_ptr<gfx::GpuMemoryBuffer> MojoGpuMemoryBufferImpl::Create(
     const gfx::Size& size,
     gfx::BufferFormat format,
     gfx::BufferUsage usage) {
   size_t bytes = gfx::BufferSizeForBufferFormat(size, format);
   scoped_ptr<base::SharedMemory> shared_memory(new base::SharedMemory);
 
 #if defined(OS_MACOSX)
@@ skipping 33 matching lines @@
   return reinterpret_cast<uint8_t*>(shared_memory_->memory()) +
          gfx::BufferOffsetForBufferFormat(size_, format_, plane);
 }
 
 void MojoGpuMemoryBufferImpl::Unmap() {
   DCHECK(mapped_);
   shared_memory_->Unmap();
   mapped_ = false;
 }
 
-gfx::Size MojoGpuMemoryBufferImpl::GetSize() const {
-  return size_;
-}
-
-gfx::BufferFormat MojoGpuMemoryBufferImpl::GetFormat() const {
-  return format_;
-}
-
 int MojoGpuMemoryBufferImpl::stride(size_t plane) const {
   DCHECK_LT(plane, gfx::NumberOfPlanesForBufferFormat(format_));
   return base::checked_cast<int>(gfx::RowSizeForBufferFormat(
       size_.width(), format_, static_cast<int>(plane)));
 }
 
-gfx::GpuMemoryBufferId MojoGpuMemoryBufferImpl::GetId() const {
-  return gfx::GpuMemoryBufferId(0);
-}
-
 gfx::GpuMemoryBufferHandle MojoGpuMemoryBufferImpl::GetHandle() const {
   gfx::GpuMemoryBufferHandle handle;
   handle.type = gfx::SHARED_MEMORY_BUFFER;
   handle.handle = shared_memory_->handle();
   handle.offset = 0;
   handle.stride = static_cast<int32_t>(
       gfx::RowSizeForBufferFormat(size_.width(), format_, 0));
+
   return handle;
 }
 
-ClientBuffer MojoGpuMemoryBufferImpl::AsClientBuffer() {
-  return reinterpret_cast<ClientBuffer>(this);
+gfx::GpuMemoryBufferType MojoGpuMemoryBufferImpl::GetBufferType() const {
+  return gfx::SHARED_MEMORY_BUFFER;
 }
 
 }  // namespace mus