basesurf.cpp

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

            FillColorKey();
            m_nOldBltMode = HX_BASIC_BLT;

            m_bOffBecauseofShinking = FALSE;
        }
    }

    return TRUE;
}

/************************************************************************
 *  Method:
 *    IUnknown::QueryInterface
 */
STDMETHODIMP CBaseSurface::QueryInterface(REFIID riid, void** ppvObj)
{
    if (IsEqualIID(riid, IID_IHXVideoSurface))
    {
        AddRef();
        *ppvObj = (IUnknown*)(IHXVideoSurface*)this;
        return HXR_OK;
    }
    else if (IsEqualIID(riid, IID_IUnknown))
    {
        AddRef();
        *ppvObj = (IUnknown*)(IHXSite*)this;
        return HXR_OK;
    }

    else if (IsEqualIID(riid, IID_IHXVideoControl))
    {
        AddRef();
        *ppvObj = (IUnknown*)(IHXVideoControl*)this;
        return HXR_OK;
    }
    else if (IsEqualIID(riid, IID_IHXOverlayResponse))
    {
        AddRef();
        *ppvObj = (IUnknown*)(IHXOverlayResponse*)this;
        return HXR_OK;
    }

    *ppvObj = NULL;
    return HXR_NOINTERFACE;
}

/************************************************************************
 *  Method:
 *    IUnknown::AddRef
 */
STDMETHODIMP_(ULONG32) CBaseSurface::AddRef()
{
    return InterlockedIncrement(&m_lRefCount);
}

/************************************************************************
 *  Method:
 *    IUnknown::Release
 */
STDMETHODIMP_(ULONG32) CBaseSurface::Release()
{
    if (InterlockedDecrement(&m_lRefCount) > 0)
    {
        return m_lRefCount;
    }

    delete this;
    return 0;
}

BOOL  CBaseSurface::IsPixelTransparent(HXxPoint& point, INT32 nAlphaLevel )
{
    BOOL      retVal = FALSE;
    INT32     nCID   = -1;
    INT32     nPitch = 0;
    HXxPoint  origin = *(m_pSite->GetOrigin());

    //It can only be transparent if we are blt'ing ARGB32.
    nCID   = GETBITMAPCOLOR(&m_bmiLastBlt);
    nPitch = GETBITMAPPITCH(&m_bmiLastImage);

    if( nCID == CID_ARGB32 )
    {
        if( m_pucLastImage )
        {
            UINT32* pPixel=NULL;

            if( nPitch<0 )
            {
                pPixel = (UINT32*)(m_pucLastImage+m_bmiLastImage.biSizeImage+nPitch);
                pPixel -= (point.y-origin.y)*m_bmiLastImage.biWidth - (point.x-origin.x);
            }
            else
            {
                pPixel = (UINT32*)m_pucLastImage;
                pPixel += (point.y-origin.y)*m_bmiLastImage.biWidth + (point.x-origin.x);
            }

            if( pPixel>=(UINT32*)m_pucLastImage &&
                pPixel<(UINT32*)(m_pucLastImage+m_bmiLastImage.biSizeImage))
            {
                int alpha = (*pPixel&0xff000000)>>24;
                if( alpha > nAlphaLevel )
                {
                    retVal = TRUE;
                }
            }
        }
    }
    return retVal;
}

void CBaseSurface::_AlphaBlend( HXREGION*              pRegionToBlend, 
                                UCHAR*               pBottomImage,
                                HXBitmapInfoHeader* pbmiBottomImageInfo,
                                HXxPoint*            pBottomPosition,
                                UCHAR*               pTopImage,
                                HXBitmapInfoHeader* pbmiTopImageInfo,
                                HXxPoint*            pTopPosition
                                )
{
#ifdef _USE_MMX
    static const BOOL bMMXAvailable = (checkMmxAvailablity()&CPU_HAS_MMX)?1:0;
#else   
    static const BOOL bMMXAvailable = FALSE;
#endif 
   
#if defined(_DEBUG) && 0
    _DumpRegion(pRegionToBlend);
#endif
    if( pBottomImage == NULL || pTopImage == NULL )
    {
        return;
    }

    //Make sure we only try to alpha blend ARGB32 content.
    int nCIDBottom   = GETBITMAPCOLOR( pbmiBottomImageInfo );
    int nCIDTop      = GETBITMAPCOLOR( pbmiTopImageInfo );
    int nBottomPitch = GETBITMAPPITCH( pbmiBottomImageInfo );
    int nTopPitch    = GETBITMAPPITCH( pbmiTopImageInfo );

    if( nCIDTop != CID_ARGB32 || (nCIDBottom!=CID_ARGB32 && nCIDBottom!=CID_RGB32) )
    {
        HX_ASSERT( "Trying to alphablend unsupported type." );
        return;
    }

    BOOL  bFade=FALSE;
    int   completeness = 0;
    if( (m_pSite->m_fpTransitionEffect == Crossfade ||
         m_pSite->m_fpTransitionEffect == FadeToColor ||
         m_pSite->m_fpTransitionEffect == FadeFromColor )
        && m_pSite->m_nTransitionState!= 1000 )
    {
        completeness = m_pSite->m_nTransitionState;
      
        if((m_pSite->m_fpTransitionEffect != Crossfade &&
            m_pSite->m_bTransitionReversed) ||
           (m_pSite->m_fpTransitionEffect == Crossfade &&
            (!m_pSite->m_bTransitionTranIn ^
             m_pSite->m_bTransitionReversed)))
        {
            completeness = 1000 - completeness;
        }
      

        if( m_pSite->m_fpTransitionEffect== FadeFromColor)
        {
            completeness = 1000 - completeness;
        }
      
      
        //Map [0,1000] --> [0,1024] for fixed point fade math.
        completeness = (int)((float)completeness*1024.0/1000.0);
        bFade=TRUE;
    }
   

    if( !HXEmptyRegion(pRegionToBlend) )
    {
        int nBottomOffset = 0;
        int nTopOffset    = 0;
        int nBotPosX      = 0;
        int nBotPosY      = 0;
        int nTopPosX      = 0;
        int nTopPosY      = 0;

      
        for(int i =0; i< pRegionToBlend->numRects; i++)
        {
            //We need to alpha blend each rect in the region.
            int topX=0, topY = 0;
            int botX=0, botY = 0;
            topX = pRegionToBlend->rects[i].x1;
            topY = pRegionToBlend->rects[i].y1;
            botX = pRegionToBlend->rects[i].x2;
            botY = pRegionToBlend->rects[i].y2;

            if( nBottomPitch<0 )
                nBottomOffset = -(pbmiBottomImageInfo->biWidth+(botX-topX));
            else
                nBottomOffset = pbmiBottomImageInfo->biWidth-(botX-topX);

            if( nTopPitch<0 )
                nTopOffset = -(pbmiTopImageInfo->biWidth+(botX-topX));
            else
                nTopOffset = pbmiTopImageInfo->biWidth-(botX-topX);
     
            nTopPosX = pTopPosition->x;
            nTopPosY = pTopPosition->y;
            nBotPosX = pBottomPosition->x;
            nBotPosY = pBottomPosition->y;
         
            //blend this rect.
            UINT32* pulBotPixel=NULL;
            UINT32* pulTopPixel=NULL;

            if( nBottomPitch<0 )
            {
                pulBotPixel = (UINT32*)(pBottomImage+pbmiBottomImageInfo->biSizeImage+nBottomPitch);
                pulBotPixel -= ((topY-nBotPosY)*pbmiBottomImageInfo->biWidth - (topX-nBotPosX));
            }
            else
            {
                pulBotPixel = (UINT32*)pBottomImage;
                pulBotPixel += ((topY-nBotPosY)*pbmiBottomImageInfo->biWidth + (topX-nBotPosX));
            }
         
     
            if( nTopPitch<0 )
            {
                pulTopPixel = (UINT32*)(pTopImage+pbmiTopImageInfo->biSizeImage+nTopPitch);
                pulTopPixel -= ((topY-nTopPosY)*pbmiTopImageInfo->biWidth    - (topX-nTopPosX));
            }
            else
            {
                pulTopPixel = (UINT32*)pTopImage;
                pulTopPixel += ((topY-nTopPosY)*pbmiTopImageInfo->biWidth    + (topX-nTopPosX));

            }

            int alpha     = 0;
            int alphasave = 0;

            for( int y=topY ; y<=botY-1 ; y++ )
            {
                //XXXgfw this blows! We need a version of our MMX version
                //for doing fades as well.
                if( !bMMXAvailable || bFade )
                {
                    for( int x=topX ; x<=botX-1 ; x++ )
                    {
                        //Blend it.
                        //We *MUST* preserve the alpha channel in the top image.
                        //This is needed for hit testing on transparent pixels.
                        if( !bFade )
                        {
                            alpha = 255-((*pulTopPixel & 0xff000000)>>24);
                            alphasave = *pulTopPixel & 0xff000000; 
                            alpha = alpha>128 ? alpha + 1 : alpha;
                        }
                        else
                        {
                            if( m_pSite->m_fpTransitionEffect == Crossfade )
                            {
                                //fixed point version of (comp/1000 * alpha )
                                alpha = (*pulTopPixel & 0xff000000)>>24;
                                if( GETBITMAPCOLOR(&m_bmiLastBlt) != CID_ARGB32 )
                                    alpha = 0x00;
                                alpha = ((completeness*(255-alpha)+512))>>10;
                                alphasave = (255-alpha)<<24;
                            }
                            else if( m_pSite->m_fpTransitionEffect == FadeToColor ||
                                     m_pSite->m_fpTransitionEffect == FadeFromColor)
                            {
                                //Not only affect alpha but also fading to color.
                                alpha = (completeness*255+512)>>10;
                                UINT32 fadeColor = (m_pSite->m_ulTransitionFadeColor&0x00ffffff)|(alpha<<24);
                                int a1 = 255-((*pulTopPixel&0xff000000)>>24);
                                *pulTopPixel =
                                    (((alpha*( (fadeColor&0x00ff0000)-(*pulTopPixel&0x00ff0000))+((*pulTopPixel&0x00ff0000)<<8))>>8)&0x00ff0000)|
                                    (((alpha*( (fadeColor&0x0000ff00)-(*pulTopPixel&0x0000ff00))+((*pulTopPixel&0x0000ff00)<<8))>>8)&0x0000ff00)|
                                    (((alpha*( (fadeColor&0x000000ff)-(*pulTopPixel&0x000000ff))+((*pulTopPixel&0x000000ff)<<8))>>8)&0x000000ff);

                        
                                if( alpha<a1 )
                                    alpha = a1;
                                //Now make sure the rest of the blending uses the
                                //new alpha channel from the FadeToColor state.
                                alphasave = *pulTopPixel & ((255-alpha)<<24);

                                //OK, we never alpha blend if a renderer outputs in plain old
                                //RGB, only if they output in ARGB. Now, some renderer blt'ing in
                                //RGB32 output random numbers, all zeros or all 0xFF in the alpha
                                //channel. That can screw us up, so we will just set it here to not
                                //have an alpha channel.
                                if( GETBITMAPCOLOR(&m_bmiLastBlt) != CID_ARGB32 )
                                    alpha = 0xFF;
                            }
                        }
                        *pulTopPixel =
                            (((alpha*( (*pulTopPixel&0x00ff0000)-(*pulBotPixel&0x00ff0000))+((*pulBotPixel&0x00ff0000)<<8))>>8)&0x00ff0000)|
                            (((alpha*( (*pulTopPixel&0x0000ff00)-(*pulBotPixel&0x0000ff00))+((*pulBotPixel&0x0000ff00)<<8))>>8)&0x0000ff00)|
                            (((alpha*( (*pulTopPixel&0x000000ff)-(*pulBotPixel&0x000000ff))+((*pulBotPixel&0x000000ff)<<8))>>8)&0x000000ff);
                        *pulTopPixel = *pulTopPixel|alphasave;

                        //Next pixel
                        pulBotPixel++;
                        pulTopPixel++;
                    }
               
                    //Next row.
                    pulBotPixel += nBottomOffset;
                    pulTopPixel += nTopOffset;
                }
                else
                {
#ifdef _USE_MMX
                    //Use MMX version of blender
                    AlphaBlendMMX( pulTopPixel,
                                   pulBotPixel,
                                   (botX-topX)
                                   );
                    //Next row.
                    pulBotPixel += nBottomOffset+(botX-topX);
                    pulTopPixel += nTopOffset+(botX-topX);
#endif         
                }
            }
#ifdef _USE_MMX
            //Do our emms instruction here so we don't have do it each
            //line. It is a expensive operation.
#ifdef _WIN32
            __asm emms
#elif defined(_LINUX)
                __asm__ __volatile__ ( "emms" );
#endif                    
#endif
         
        }
    }
}

#if 0
void CBaseSurface::DrawCheckerBoard(UCHAR *pY, UCHAR *pU, UCHAR *pV,
                                    INT32 nYPitch, INT32 nUPitch, INT32 nVPitch,
                                    INT32 nImageWidth, INT32 nImageHeight)
{
    const int COLS = 5;
    const int ROWS = 5;
    int Y[2] = {255, 0};
    int Cb = 128;
    int Cr = 128;
    
    int nColWidth = nImageWidth/COLS;
    int nRowWidth = nImageHeight/ROWS;
    
    IHXPreferences* pPreferences = NULL;
    IHXBuffer* pBuffer = NULL;