// Copyright (c) 2011 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.

#import <OpenGL/OpenGL.h>

#include "content/plugin/webplugin_accelerated_surface_proxy_mac.h"

#include "base/bind.h"
#include "content/plugin/webplugin_proxy.h"
#include "ui/gfx/surface/accelerated_surface_mac.h"
#include "ui/gfx/surface/transport_dib.h"

WebPluginAcceleratedSurfaceProxy::WebPluginAcceleratedSurfaceProxy(
    WebPluginProxy* plugin_proxy,
    gfx::GpuPreference gpu_preference)
        : plugin_proxy_(plugin_proxy),
          window_handle_(NULL) {
  surface_ = new AcceleratedSurface;
  // It's possible for OpenGL to fail to initialze (e.g., if an incompatible
  // mode is forced via flags), so handle that gracefully.
  if (!surface_->Initialize(NULL, true, gpu_preference)) {
    delete surface_;
    surface_ = NULL;
    return;
  }

  // Only used for 10.5 support, but harmless on 10.6+.
  surface_->SetTransportDIBAllocAndFree(
      base::Bind(&WebPluginProxy::AllocSurfaceDIB,
          base::Unretained(plugin_proxy)),
      base::Bind(&WebPluginProxy::FreeSurfaceDIB,
          base::Unretained(plugin_proxy)));
}

WebPluginAcceleratedSurfaceProxy::~WebPluginAcceleratedSurfaceProxy() {
  if (surface_) {
    surface_->Destroy();
    delete surface_;
    surface_ = NULL;
  }
}

void WebPluginAcceleratedSurfaceProxy::SetWindowHandle(
    gfx::PluginWindowHandle window) {
  window_handle_ = window;
}

void WebPluginAcceleratedSurfaceProxy::SetSize(const gfx::Size& size) {
  if (!surface_)
    return;

  uint64 io_surface_id = surface_->SetSurfaceSize(size);
  if (io_surface_id) {
    plugin_proxy_->SetAcceleratedSurface(window_handle_, size, io_surface_id);
  } else {
    TransportDIB::Handle transport_dib = surface_->SetTransportDIBSize(size);
    if (TransportDIB::is_valid_handle(transport_dib)) {
      plugin_proxy_->SetAcceleratedDIB(window_handle_, size, transport_dib);
    }
  }
}

CGLContextObj WebPluginAcceleratedSurfaceProxy::context() {
  return surface_ ? surface_->context() : NULL;
}

void WebPluginAcceleratedSurfaceProxy::StartDrawing() {
  if (!surface_)
    return;

  surface_->MakeCurrent();
  surface_->Clear(gfx::Rect(surface_->GetSize()));
}

void WebPluginAcceleratedSurfaceProxy::EndDrawing() {
  if (!surface_)
    return;

  surface_->SwapBuffers();
  plugin_proxy_->AcceleratedFrameBuffersDidSwap(
      window_handle_, surface_->GetSurfaceId());
}