[Ozone-DRI] Adding ScanoutBuffer interface

ui/ozone/platform/dri/dri_buffer.cc

 // Copyright 2014 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 "ui/ozone/platform/dri/dri_buffer.h"
 
 #include "base/logging.h"
 #include "ui/ozone/platform/dri/dri_wrapper.h"
 
 namespace ui {
@@ skipping 61 matching lines @@
 
   surface_ = skia::AdoptRef(SkSurface::NewRasterDirect(info, pixels, stride_));
   if (!surface_) {
     VLOG(2) << "Cannot install Skia pixels for drm buffer";
     return false;
   }
 
   return true;
 }
 
+SkCanvas* DriBuffer::GetCanvas() const {
+  return surface_->getCanvas();
+}
+
+uint32_t DriBuffer::GetFramebufferId() const {
+  return framebuffer_;
+}
+
+uint32_t DriBuffer::GetHandle() const {
+  return handle_;
+}
+
+gfx::Size DriBuffer::GetSize() const {
+  return gfx::Size(surface_->width(), surface_->height());
+}
+
+DriBufferGenerator::DriBufferGenerator(DriWrapper* dri) : dri_(dri) {}
+
+DriBufferGenerator::~DriBufferGenerator() {}
+
+scoped_refptr<ScanoutBuffer> DriBufferGenerator::Create(const gfx::Size& size) {
+  scoped_refptr<DriBuffer> buffer(new DriBuffer(dri_));
+  SkImageInfo info = SkImageInfo::MakeN32Premul(size.width(), size.height());
+  if (!buffer->Initialize(info))
+    return NULL;
+
+  return buffer;
+}
+
 }  // namespace ui