/*
 *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */

#include "engine_configurations.h"

#if defined(CARBON_RENDERING)

#ifndef WEBRTC_MODULES_VIDEO_RENDER_MAIN_SOURCE_MAC_VIDEO_RENDER_AGL_H_
#define WEBRTC_MODULES_VIDEO_RENDER_MAIN_SOURCE_MAC_VIDEO_RENDER_AGL_H_


#include "video_render_defines.h"


#define NEW_HIVIEW_PARENT_EVENT_HANDLER 1
#define NEW_HIVIEW_EVENT_HANDLER		1
#define USE_STRUCT_RGN

#include <AGL/agl.h>
#include <Carbon/Carbon.h>
#include <OpenGL/OpenGL.h>
#include <OpenGL/glu.h>
#include <OpenGL/glext.h>
#include <list>
#include <map>

class VideoRenderAGL;

namespace webrtc {
class CriticalSectionWrapper;
class EventWrapper;
class ThreadWrapper;

class VideoChannelAGL : public VideoRenderCallback
{
public:

	VideoChannelAGL(AGLContext& aglContext, int iId, VideoRenderAGL* owner);
    virtual ~VideoChannelAGL();
    virtual int FrameSizeChange(int width, int height, int numberOfStreams);
    virtual int DeliverFrame(unsigned char* buffer, int bufferSize, unsigned int timeStame90kHz);    
    virtual int UpdateSize(int width, int height);
    int SetStreamSettings(int streamId, float startWidth, float startHeight, float stopWidth, float stopHeight);
    int SetStreamCropSettings(int streamId, float startWidth, float startHeight, float stopWidth, float stopHeight);
    int RenderOffScreenBuffer();
    int IsUpdated(bool& isUpdated);
	virtual int UpdateStretchSize(int stretchHeight, int stretchWidth);
	virtual WebRtc_Word32 RenderFrame(const WebRtc_UWord32 streamId, VideoFrame& videoFrame);
    
    
private:
	
	AGLContext      _aglContext;
	int				_id;
    VideoRenderAGL* _owner;
    int             _width;
    int             _height;
	int				_stretchedWidth;
	int				_stretchedHeight;
    float           _startHeight;
    float           _startWidth;
    float           _stopWidth;
    float           _stopHeight;
    int				_xOldWidth;
	int				_yOldHeight;
	int				_oldStretchedHeight;
	int				_oldStretchedWidth;
	unsigned char*  _buffer;
    int             _bufferSize;
    int             _incommingBufferSize;
    bool            _bufferIsUpdated;
	bool			_sizeInitialized;
    int             _numberOfStreams;
	bool			_bVideoSizeStartedChanging;
	GLenum          _pixelFormat;
    GLenum          _pixelDataType;
    unsigned int    _texture;	
};


class VideoRenderAGL
{
public:
    VideoRenderAGL(WindowRef windowRef, bool fullscreen, int iId);
    VideoRenderAGL(HIViewRef windowRef, bool fullscreen, int iId);
    ~VideoRenderAGL();

    int		Init();
    VideoChannelAGL* CreateAGLChannel(int channel, int zOrder, float startWidth, float startHeight, float stopWidth, float stopHeight);
    VideoChannelAGL* ConfigureAGLChannel(int channel, int zOrder, float startWidth, float startHeight, float stopWidth, float stopHeight);
    int		DeleteAGLChannel(int channel);
    int		DeleteAllAGLChannels();
    int		StopThread();
    bool	IsFullScreen();
    bool	HasChannels();
    bool	HasChannel(int channel);
    int		GetChannels(std::list<int>& channelList);
    void	LockAGLCntx();    
    void	UnlockAGLCntx();
	
	static int GetOpenGLVersion(int& aglMajor, int& aglMinor);
	
	// ********** new module functions ************ //
	int ChangeWindow(void* newWindowRef);
	WebRtc_Word32 ChangeUniqueID(WebRtc_Word32 id);
	WebRtc_Word32 StartRender();
	WebRtc_Word32 StopRender();
	WebRtc_Word32 DeleteAGLChannel(const WebRtc_UWord32 streamID);
	WebRtc_Word32 GetChannelProperties(const WebRtc_UWord16 streamId,
									 WebRtc_UWord32& zOrder,
									 float& left,
									 float& top,
									 float& right,
									 float& bottom);

protected:
    static bool ScreenUpdateThreadProc(void* obj);
    bool ScreenUpdateProcess();
    int GetWindowRect(Rect& rect);
	
private:
    int		CreateMixingContext();
    int		RenderOffScreenBuffers();
    int		SwapAndDisplayBuffers();
	int		UpdateClipping();
    int		CalculateVisibleRegion(ControlRef control, RgnHandle &visibleRgn, bool clipChildren);
    bool	CheckValidRegion(RgnHandle rHandle);
    void	ParentWindowResized(WindowRef window);

    // Carbon GUI event handlers
    static pascal OSStatus sHandleWindowResized (EventHandlerCallRef nextHandler, EventRef theEvent, void* userData);
    static pascal OSStatus sHandleHiViewResized (EventHandlerCallRef nextHandler, EventRef theEvent, void* userData);

    HIViewRef                       _hiviewRef;
	WindowRef                       _windowRef;
    bool                            _fullScreen;
	int								_id;
    webrtc::CriticalSectionWrapper&            _renderCritSec;
    webrtc::ThreadWrapper*                     _screenUpdateThread;
    webrtc::EventWrapper*                      _screenUpdateEvent;
	bool                            _isHIViewRef; 
    AGLContext                      _aglContext;
    int                             _windowWidth;
    int                             _windowHeight;
    int                             _lastWindowWidth;
    int                             _lastWindowHeight;
    int                             _lastHiViewWidth;
    int                             _lastHiViewHeight;
	int								_currentParentWindowHeight;
	int								_currentParentWindowWidth;
	Rect							_currentParentWindowBounds;
	bool							_windowHasResized;
	Rect							_lastParentWindowBounds;
	Rect							_currentHIViewBounds;
	Rect							_lastHIViewBounds;
    Rect                            _windowRect;
    std::map<int, VideoChannelAGL*> _aglChannels;
    std::multimap<int, int>			_zOrderToChannel;
	EventHandlerRef					_hiviewEventHandlerRef;
	EventHandlerRef					_windowEventHandlerRef;
	HIRect							_currentViewBounds;
	HIRect							_lastViewBounds;
	bool							_renderingIsPaused;
	unsigned int					_threadID;
	
	
};

} //namespace webrtc


#endif   // WEBRTC_MODULES_VIDEO_RENDER_MAIN_SOURCE_MAC_VIDEO_RENDER_AGL_H_

#endif // CARBON_RENDERING