android_webview: changes to support Android GraphicBuffers

android_webview/browser/graphic_buffer_impl.cc

+// Copyright (c) 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 "android_webview/browser/graphic_buffer_impl.h"
+
+#include "android_webview/browser/graphic_buffer_factory_impl.h"
+#include "android_webview/common/graphic_buffer_factory_proxy.h"
+#include "android_webview/public/browser/draw_gl.h"
+#include "base/bind.h"
+#include "base/logging.h"
+#include "cc/resources/graphic_buffer.h"
+#include "ui/gfx/size.h"
+
+namespace android_webview {
+
+// Provides hardware rendering functions from the Android glue layer.
+AwDrawGLFunctionTable* g_gl_draw_functions = NULL;
+
+GraphicBufferImpl::GraphicBufferImpl(const gfx::Size& size)
+    : buffer_id_(g_gl_draw_functions->create_graphic_buffer(
+          size.width(), size.height())),
+      size_(size) {
+}
+
+GraphicBufferImpl::~GraphicBufferImpl() {
+  DCHECK(buffer_id_ != 0);
+  g_gl_draw_functions->release_graphic_buffer(buffer_id_);
+  buffer_id_ = 0;
+}
+
+bool GraphicBufferImpl::LockForRead(void** vaddr) {
+  DCHECK(buffer_id_ != 0);
+  return g_gl_draw_functions->lock_for_read(buffer_id_, vaddr) == 0;
+}
+
+bool GraphicBufferImpl::LockForWrite(void** vaddr) {
+  DCHECK(buffer_id_ != 0);
+  return g_gl_draw_functions->lock_for_write(buffer_id_, vaddr) == 0;
+}
+
+bool GraphicBufferImpl::Unlock() {
+  DCHECK(buffer_id_ != 0);
+  return g_gl_draw_functions->unlock(buffer_id_) == 0;
+}
+
+gfx::Size GraphicBufferImpl::GetSize() {
+  return size_;
+}
+
+void* GraphicBufferImpl::GetNativeBuffer() {
+  DCHECK(buffer_id_ != 0);
+  return g_gl_draw_functions->get_native_buffer(buffer_id_);
+}
+
+uint32 GraphicBufferImpl::GetStride() {
+  DCHECK(buffer_id_ != 0);
+  return g_gl_draw_functions->get_stride(buffer_id_);
+}
+
+// static
+void GraphicBufferImpl::SetAwDrawGLFunctionTable(
+    AwDrawGLFunctionTable* table) {
+  g_gl_draw_functions = table;
+  SetGraphicBufferFactoryProxy(base::Bind(&CreateGraphicBuffer));
+}
+
+}  // namespace android_webview