basesurf.h

著名的 helix realplayer 基于手机 symbian 系统的 播放器全套源代码

        INT32    count;
        AlphaStruct* pAlphaList;
    } tFrameElement;

    //Color Access Functions/
    ColorFuncAccess*        zm_pColorAcc;
    CYUVInputFormatMngr*    m_pyuvInputMngr;
    CHWMemObj*              m_pHwMemObj;

    //Scroll bar support
    double        m_fScrollBarZoom;

    //Support for Alpha Blending.....
    UCHAR*              m_pucLastImage;
    HXBitmapInfoHeader m_bmiLastImage;
    HXBitmapInfoHeader m_bmiLastBlt;
    UINT32              m_ulLastBlendTime;

public:    

    CHXMapPtrToPtr m_YUVAImageList; //Maps site to YUVA image.
    CHXSimpleList  m_imageBlocks;   //List of YUV blended images to paint.

    CHXBaseSite* GetSite()  {return m_pSite;}
protected:
    CHXSimpleList  m_LinkedSites;   
    HXREGION*        m_pAdditionalColorKey;
    BOOL           m_bYUVBlending;
    BOOL           m_bVideoSurface2;
    BOOL           m_bOptimalVideoScheduler;
    
    //XXXgfw I am assuming now that I can use the below scaling for
    //XXXgfw my YUV optimized alphablending...
    double m_scaleFactorX;
    double m_scaleFactorY;
    
    HXxRect* m_paSrcRects;
    HXxRect* m_paDestRects;
    
    //paSrcRects and paDestRects need to be HX_FREEed when you are done
    //with them. internally a realloc is done so don't free then until
    //you are sure you are done or want to reclaim the memory.
    void _ConstructRects(HXxRect&  rSrcRectCopy,
                         HXxRect&  rDestRectCopy,
                         BOOL      bDoAlpha,
                         int&      nNumRects,
                         HXxRect** paSrcRects, 
                         HXxRect** paDestRects,
                         HXREGION*   pAdditionalRegion = NULL
                         );
    //This determines what is the best way to ask for system memory to
    //be filled in by rvrend under VidSurf2.  You must delete the
    //returned region.
    HXREGION* _DetermineBestRegion();

public:    
    //Returns if any blending is going to happen or not.
    BOOL _SetUpBlendRects( HXBitmapInfoHeader* pBitmapInfo = NULL,
                           UCHAR* pImageData = NULL);
protected:    
    BOOL _RecursiveYUVBlend( Image* pImage,
                             HXxRect boundingRect,
                             CBaseSurface* pSurface,
                             INT32 lXOffset,
                             INT32 lYOffset);
        
    //blends the rects and put the results into m_imageBlocks.
    BOOL _BlendYUVRects( AlphaStruct* pList, int nCount, UINT32 ulDestFourCC);
    BOOL _DoYUVRectsIntersect();
    
    void _RemoveYUVImageLists();
    CHXBaseSite* _SearchForYUV(CHXBaseSite* pSite);

    BOOL _AlphaSetupAndBlending(HXBitmapInfoHeader* pBitmapInfo,
                                UCHAR*               pImageData,
                                HXxRect&             rSrcRect,
                                HXxRect&             rDestRect
                                );
   
    void _AlphaBlend( HXREGION*              pRegionToBlend,    //window coords 
                      UCHAR*               pBottomImage,
                      HXBitmapInfoHeader* pbmiBottomImageInfo,
                      HXxPoint*            pBottomPosition,   //window coords
                      UCHAR*               pTopImage,
                      HXBitmapInfoHeader* pbmiTopImageInfo,
                      HXxPoint*            pTopPosition      //window coords
                      );
   
    //Returns whether or not this graphics device allows the shrinking of
    //overlays.
    virtual BOOL _AllowsOverlayShrinking();
    virtual void _WaitForFlush();
    BOOL m_bImageBlocksGood;

    void         AlignRect(HXxRect *pRect, int nMaxWidth, int nMaxHeight);

    virtual void CreateColorAccess(IUnknown* pUnk) {zm_pColorAcc = new ColorFuncAccess(pUnk);}
    virtual void CreateYuvInputMngr();

    BOOL    m_bAllocHook;   // Are we tracing mem allocs
   
public:
   
    //To test if a pixel is transparent or not.
    BOOL IsPixelTransparent(HXxPoint& point, INT32 alpha );

    HXBitmapInfo* GetLastBMI() { return (HXBitmapInfo*)&m_bmiLastBlt; }

    void InitSurface(IUnknown* pUnk);
      
    //Virtual Functions which must me implemented by each OS.

    /************************************************************************
     *  Method:
     *      _ReleaseSurface
     *  Purpose:
     *      Destroys pSurface
     */
    virtual void      _ReleaseSurface(CBaseRootSurface* pSurface) = 0;

    /************************************************************************
     *  Method:
     *      _DrawBlack
     *  Purpose:
     *      Fill the entire region with black
     */
    virtual void      _DrawBlack(void* pWindow) = 0;

    /************************************************************************
     *  Method:
     *      _BltToPrimary
     *  Purpose:
     *      Transfer data from offscreen memory to the primary surface.
     *      This may not be applicable on some platforms.
     */
    virtual HX_RESULT _BltToPrimary(REF(HXxRect) rDestRect, REF(HXxRect) rSrcRect) = 0;

    /************************************************************************
     *  Method:
     *      _CreateBuffer
     *  Purpose:
     *      Create an offscreen (non-overlay) video buffer.  This is used
     *      when overlay is not available .
     *      This may not be applicable on some platforms.
     */
    virtual void      _CreateBuffer() = 0;

    /************************************************************************
     *  Method:
     *      _GetCaps
     *  Purpose:
     *      Query the current display device's drawing capabilities.  See
     *      the list of display caps at the top of this file.
     */
    virtual HX_RESULT _GetCaps(UINT32 *pfSurfaceCaps) = 0;

    /************************************************************************
     *  Method:
     *      _CreateOverlay
     *  Purpose:
     *      Create a video surface of type cid at dimenstions x,y.  If
     *      bOverlay is TRUE, the surface must be overlay.
     */
    virtual HX_RESULT _CreateOverlay(BOOL bOverlay, int cid, int x, int y) = 0; 

    /************************************************************************
     *  Method:
     *      _LockInternalSurface
     *  Purpose:
     *      Obtain a writable pointer to the allocated video surface and
     *      prepare to write to it.
     */
    virtual HX_RESULT _LockInternalSurface(UCHAR** ppSurfPtr, LONG32* pnSurfPitch, REF(HXxSize) srcSize) = 0;

    /************************************************************************
     *  Method:
     *      _UnlockInternalSurface
     *  Purpose:
     *      Inform the video surface that you are finished writing to it.
     */
    virtual HX_RESULT _UnlockInternalSurface(UCHAR* pSurfPtr) = 0;

    
    /************************************************************************
     *  Method:
     *      _SetupDCObjects
     *  Purpose:
     *      Set the current display context with a specific brush and pen.
     *      This may not be applicable on some platforms.
     */
    virtual void      _SetupDCObjects(HXxDC hxxDC,
                                      void** phOldBrush,
                                      void** phOldPen) = 0;
    /************************************************************************
     *  Method:
     *      _FillRectangle
     *  Purpose:
     *      Fill the specified rectangle with the current brush.
     */
    virtual void      _FillRectangle(HXxDC hxxDC,
                                     UINT32 left,
                                     UINT32 top,
                                     UINT32 right,
                                     UINT32 bottom) = 0;
    
    /************************************************************************
     *  Method:
     *      _RestoreDCObjects
     *  Purpose:
     *      Restore the default pen and brush of the display context.
     *      This may not be applicable on some platforms.
     */
    virtual void  _RestoreDCObjects(HXxDC hxxDC, void* hOldBrush, void* hOldPen) = 0;

    /************************************************************************
     *  Method:
     *      _GetCompositionSurfaceHXxDC
     *  Purpose:
     *      Get the display context of the composition surface.
     *      This may not be applicable on some platforms.
     */
    virtual void  _GetCompositionSurfaceHXxDC(HXxDC *hdc) = 0;

    /************************************************************************
     *  Method:
     *      _ReleaseCompositionSurfaceHXxDC
     *  Purpose:
     *      Release the display context of the composition surface.
     *      This may not be applicable on some platforms.
     */
    virtual void  _ReleaseCompositionSurfaceHXxDC(HXxDC hdc) = 0;

    /************************************************************************
     *  Method:
     *      _InsureColorMatch
     *  Purpose:
     *      Match inColor with that of the current display device.
     *      This may not be applicable on some platforms.
     */
    virtual INT32 _InsureColorMatch(INT32 InColor) = 0;

    /************************************************************************
     *  Method:
     *      _SetColorKey
     *  Purpose:
     *      Set the color of the overlay's colorkey.
     *      This may not be applicable on some platforms.
     */
    virtual void  _SetColorKey(INT32 nColorSpaceLowValue, INT32 nColorSpaceHighValue) = 0;


    /************************************************************************
     *  Method:
     *      _UpdateOverlay
     *  Purpose:
     *      Update the position, size, and mode of the overaly.
     *      This may not be applicable on some platforms.
     */
    virtual void  _UpdateOverlay(HXxRect* src, HXxRect* dest, INT32 inFlags) = 0;

    /************************************************************************
     *  Method:
     *      _IsSurfaceVisible
     *  Purpose:
     *      Is the current video surface visible.
     */
    virtual BOOL  _IsSurfaceVisible() = 0;

    /************************************************************************
     *  Method:
     *      _ReleaseSurface
     *  Purpose:
     *      Destroys the allocated video surface
     */
    virtual void  _ReleaseSurface() = 0;

    /************************************************************************
     *  Method:
     *      _GetDC
     *  Purpose:
     *      Get the display context for the site that owns this surface.
     *      This may not be applicable on some platforms.
     */
    virtual HXxDC _GetDC(HXxWindow*) = 0;

    /************************************************************************
     *  Method:
     *      _ReleaseDC
     *  Purpose:
     *      Release the display context for the site that owns this surface.
     *      This may not be applicable on some platforms.
     */
    virtual void  _ReleaseDC(HXxWindow*, HXxDC) = 0;
    
    virtual void  _ColorWindows();
    virtual BOOL  UsingOverlay();

    virtual void _LockBlitter() {};
    virtual void _UnlockBlitter() {};
    virtual void _FlushSurfaces() {};
    virtual void _WaitForQueuedFrames() {};

    virtual HX_RESULT _ScheduleFrameForDisplay(void* pOsData,
                                               tFrameElement* pItem,
                                               UINT32 nResolution);
    virtual void CreateHWMemObj(int cid) {};
};

#endif  /* _BASESURF_H_ */