pxgifrnd.cpp

linux下的一款播放器

                                  ((ulBgAlpha << 24)   & 0xFF000000);
        }
        // Do we need to update the display buffer
        if (bUpdateNeeded && !m_bImageBombed)
        {
            // If we haven't received our first time sync yet
            // (m_bFirstTimeSync == TRUE), then all we need to do
            // is redraw the transparent background color into the
            // the display buffer. If we have already received our
            // first time sync, then we need to redraw the entire buffer,
            // including redrawing the frames
            if (m_bFirstTimeSync)
            {
                // We haven't draw any frames into our display buffer
                // yet, so all we have to do is redraw a transparent
                // background color into the buffer.
                DrawBackgroundColor();
                // We definitely will be using the alpha channel
                m_bUsesAlphaChannel = TRUE;
            }
            else
            {
                if (m_pGIFCodec && m_pOutputBuffer)
                {
                    // Compute the current frame we are on (note that
                    // m_ulCurImg contains the index of the NEXT frame
                    // that we are about to draw
                    UINT32 ulCurFrame = (m_ulCurImg > 0 ? m_ulCurImg - 1 : 0);
                    // Update the buffer
                    // XXXMEH - optimization for later. In some cases if we 
                    // just changed the media opacity, then it may not be necessary
                    // to start back at the beginning and rebuild the frame buffer
                    // from the first frame.
                    m_pGIFCodec->GetRGBImageEx(-1,
                                               ulCurFrame,
                                               m_pOutputBuffer->GetBuffer(),
                                               m_pGIFCodec->GetLogicalScreenWidth(),
                                               m_pGIFCodec->GetLogicalScreenHeight(),
                                               m_ulPadWidth,
                                               m_ulBytesPerPixel,
                                               m_bRowsInverted,
                                               m_bRGBOrdering,
                                               m_ulBackgroundColor,
                                               (m_ulMediaOpacity == 255 ? FALSE : TRUE),
                                               m_ulMediaOpacity,
                                               m_bMediaChromaKeySpecified,
                                               m_ulMediaChromaKey,
                                               m_ulMediaChromaKeyTolerance,
                                               m_ulMediaChromaKeyOpacity);
                    // XXXMEH - do dumb assignment for now. We should later check
                    // chroma key to find if any colors were actually encountered.
                    if (m_ulBackgroundOpacity < 255 ||
                        m_ulMediaOpacity < 255      ||
                        m_bMediaChromaKeySpecified)
                    {
                        m_bUsesAlphaChannel = TRUE;
                    }
                }
            }
        }
        retVal = m_pValues->SetPropertyCString(pName, pVal);
    }

    return retVal;
}

STDMETHODIMP CGIFRenderer::GetPropertyCString(const char* pName, REF(IHXBuffer*) rpVal)
{
    HX_RESULT retVal = HXR_FAIL;

    if (m_pValues)
    {
        retVal = m_pValues->GetPropertyCString(pName, rpVal);
    }

    return retVal;
}

STDMETHODIMP CGIFRenderer::GetFirstPropertyCString(REF(const char*) rpName, REF(IHXBuffer*) rpVal)
{
    HX_RESULT retVal = HXR_FAIL;

    if (m_pValues)
    {
        retVal = m_pValues->GetFirstPropertyCString(rpName, rpVal);
    }

    return retVal;
}

STDMETHODIMP CGIFRenderer::GetNextPropertyCString(REF(const char*) rpName, REF(IHXBuffer*) rpVal)
{
    HX_RESULT retVal = HXR_FAIL;

    if (m_pValues)
    {
        retVal = m_pValues->GetNextPropertyCString(rpName, rpVal);
    }

    return retVal;
}

STDMETHODIMP CGIFRenderer::UpdatePacketTimeOffset(INT32 lTimeOffset)
{
    HX_RESULT retVal = HXR_OK;

    // Save the time offset
    // XXXMEH - should this be negative
    m_lTimeOffset = -lTimeOffset;

    return retVal;
}

/************************************************************************
 *	Method:
 *	    IHXUpdateProperties::UpdatePlayTimes
 *	Purpose:
 *	    Call this method to update the playtime attributes
 */
STDMETHODIMP
CGIFRenderer::UpdatePlayTimes(IHXValues* pProps)
{
    return HXR_OK;
}

STDMETHODIMP CGIFRenderer::HandleCallback(UINT32 ulSchedulerTime, UINT32 ulInstance)
{
    HX_RESULT retVal = HXR_OK;
    
    if (!m_bPaused)
    {
        // Get the current scheduler time
        HXTimeval cTime = m_pScheduler->GetCurrentSchedulerTime();
        // Compute the difference in scheduler time
        UINT32 ulSchedDiff = GetTimevalDiff(m_tSchedulerTimeBase, cTime);
        // Compute the time in our timeline
        UINT32 ulTime = m_ulTimeAtSchedulerTimeBase + ulSchedDiff;
        // Update the display (if necessary)
        retVal = UpdateDisplay(ulTime);
    }

    return retVal;
}

STDMETHODIMP CGIFRenderer::CASOnPosLength(UINT32 ulPosition, UINT32 ulLength)
{
    HX_RESULT retVal = HXR_OK;

    // XXXMEH
//    char szDbgStr[128];
//    DEBUGPRINTF(szDbgStr, "CGIFRenderer::CASOnPosLength(%lu,%lu) tick=%lu\n",
//                ulPosition, ulLength, HX_GET_BETTERTICKCOUNT());

    if (m_bPaused)
    {
        // Clear the paused flag
        m_bPaused = FALSE;
        // Adjust the time according to the
        // offset passed in through OnPacket()
        INT32  lAdjustedTime  = ((INT32) ulPosition) + m_lTimeOffset;
        UINT32 ulAdjustedTime = (UINT32) (lAdjustedTime >= 0 ? lAdjustedTime : 0);
        // Set the current scheduler time base
        if (m_pScheduler)
        {
            // Compute time in milliseconds
            m_tSchedulerTimeBase = m_pScheduler->GetCurrentSchedulerTime();
            m_ulTimeAtSchedulerTimeBase = ulAdjustedTime;
        }
        // Update the display
        UpdateDisplay(ulAdjustedTime);
    }

    return retVal;
}

STDMETHODIMP CGIFRenderer::CASOnPresentationOpened()
{
    HX_RESULT retVal = HXR_OK;

    return retVal;
}

STDMETHODIMP CGIFRenderer::CASOnPresentationClosed()
{
    HX_RESULT retVal = HXR_OK;

    return retVal;
}

STDMETHODIMP CGIFRenderer::CASOnStatisticsChanged()
{
    HX_RESULT retVal = HXR_OK;

    return retVal;
}

STDMETHODIMP CGIFRenderer::CASOnPreSeek(ULONG32 ulOldTime, ULONG32 ulNewTime)
{
    HX_RESULT retVal = HXR_OK;

    return retVal;
}

STDMETHODIMP CGIFRenderer::CASOnPostSeek(ULONG32 ulOldTime, ULONG32 ulNewTime)
{
    HX_RESULT retVal = HXR_OK;

    return retVal;
}

STDMETHODIMP CGIFRenderer::CASOnStop()
{
    HX_RESULT retVal = HXR_OK;

    return retVal;
}

STDMETHODIMP CGIFRenderer::CASOnPause(ULONG32 ulTime)
{
    MLOG_MISC(m_pErrorMessages,
              "0x%08x::CASOnPause(%lu)\n",
              this, ulTime);
    HX_RESULT retVal = HXR_OK;

    m_bPaused = TRUE;

    return retVal;
}

STDMETHODIMP CGIFRenderer::CASOnBegin(ULONG32 ulTime)
{
    MLOG_MISC(m_pErrorMessages,
              "0x%08x::CASOnBegin(%lu)\n",
              this, ulTime);
    HX_RESULT retVal = HXR_OK;

    return retVal;
}

STDMETHODIMP CGIFRenderer::CASOnBuffering(ULONG32 ulFlags, UINT16 unPercentComplete)
{
    HX_RESULT retVal = HXR_OK;

    return retVal;
}

STDMETHODIMP CGIFRenderer::CASOnContacting(const char* pHostName)
{
    HX_RESULT retVal = HXR_OK;

    return retVal;
}

void CGIFRenderer::OnMouseMove(INT16 fwKeys, INT16 xPos, INT16 yPos)
{
    // Make sure we're up and running
    if (!m_pGIFCodec)
    {
        return;
    }

    // don't do anything if the x/y coordinates have changed from the
    // last call to OnMouseMove - this is needed because the call to
    // IHXStatusMessage::SetStatus() results in a WM_MOUSEMOVE event
    if(xPos == m_sOldMouseX && yPos == m_sOldMouseY)
    {
        return;
    }
    m_sOldMouseX = xPos;
    m_sOldMouseY = yPos;


#if defined(_WINDOWS)
    HCURSOR hCurrentCursor = GetCursor();
#endif

    if (xPos >= 0 && xPos < (INT16) m_pGIFCodec->GetLogicalScreenWidth()  &&
        yPos >= 0 && yPos < (INT16) m_pGIFCodec->GetLogicalScreenHeight() &&
        m_cURL.length() > 0) // we have a link
    {
        // We ARE over a hyperlink
#if defined(_WINDOWS)
        if(!m_hHyperlinkCursor)
        {
            m_hHyperlinkCursor = LoadCursor(g_hInstance, MAKEINTRESOURCE(HANDCURSOR));
            if(!m_hHyperlinkCursor)
            {
                m_hHyperlinkCursor = LoadCursor(NULL, IDC_UPARROW);
            }
        }

        if(m_hHyperlinkCursor && hCurrentCursor != m_hHyperlinkCursor)
        {
            // We're over a link and the cursor is NOT already the hyperlink cursor,
            // so change it. This will happen when we get a WM_SETCURSOR event
            m_bSetHyperlinkCursor = TRUE;
        }
#elif defined(_MACINTOSH)
        if (m_hHyperlinkCursor)
        {
            ::SetCursor(*m_hHyperlinkCursor);
            m_eCurrentCursor = CURSOR_HYPERLINK;
        }
#elif defined(_UNIX) && defined(USE_XWINDOWS)
    if (m_hCurrentCursor == -1 && m_pDisplay && m_Window && m_hHyperlinkCursor != -1)
    {
	XLockDisplay(m_pDisplay);
        XDefineCursor(m_pDisplay, m_Window, m_hHyperlinkCursor);
	XUnlockDisplay(m_pDisplay);
        m_hCurrentCursor = m_hHyperlinkCursor;
    }
#endif
    if (m_pStatusMessage)
    {
	m_bStatusMsgWillNeedErasing = TRUE;
        m_pStatusMessage->SetStatus(m_cURL.c_str());
    }
    }
    else
    {
        // We are NOT over a hyperlink
#if defined(_WINDOWS)
        if(hCurrentCursor == m_hHyperlinkCursor)
        {
            // We are not over a hyperlink and out cursor IS the hyperlink cursor,
            // so we need to change it back. This will happen when we get a WM_SETCURSOR event
            m_bSetHyperlinkCursor = FALSE;
        }
#elif defined(_MACINTOSH)
        if (m_eCurrentCursor == CURSOR_HYPERLINK)
        {
            ::InitCursor();
            m_eCurrentCursor = CURSOR_ARROW;
        }
#elif defined(_UNIX) && defined(USE_XWINDOWS)
    if (m_hCurrentCursor == m_hHyperlinkCursor)
    {
        if (m_pDisplay && m_Window)
        {
	XLockDisplay(m_pDisplay);
        XUndefineCursor(m_pDisplay, m_Window);
	XUnlockDisplay(m_pDisplay);
        m_hCurrentCursor = -1;
        }
    }
#endif
	if (m_pStatusMessage  &&
		// /Fixes PR 65008 (GIF version): only set this to NULL if we
		// have recently set the status message, otherwise we may
		// cause SMIL's setting of the status message to be
		// overwritten with NULL, i.e., erased:
		m_bStatusMsgWillNeedErasing)
	{
	    m_bStatusMsgWillNeedErasing = FALSE;
	    m_pStatusMessage->SetStatus(NULL);
	}
    }
}

STDMETHODIMP CGIFRenderer::HandleEvent(HXxEvent* pEvent)
{
    HX_RESULT retVal = HXR_OK;

    if (pEvent)
    {
        // Set defaults
        pEvent->handled = FALSE;
        pEvent->result  = 0;
        // Switch based on event type
        switch (pEvent->event)
        {
            case HX_SURFACE_UPDATE:
                {
                    if (m_pOutputBuffer)
                    {
                        IHXVideoSurface *pSurface = (IHXVideoSurface *) (pEvent->param1);
                        HXxSize           size;
                        m_pMISUSSite->GetSize(size);
                        DrawToRMASurface(pSurface, 0, 0, size);
                    }
#if defined(_UNIX) && defined(USE_XWINDOWS)
                    {
                        HXxWindow *pWnd = (HXxWindow*)pEvent->param2;
                        if (pWnd) 
                        {
                            m_pDisplay = (Display*)pWnd->display;
                            m_Window = (Window)pWnd->window;
                            if (m_pDisplay && m_hHyperlinkCursor == -1)
			    {
				    XLockDisplay(m_pDisplay);
				    m_hHyperlinkCursor = XCreateFontCursor(m_pDisplay, 
                                                   XC_hand2);
				    XUnlockDisplay(m_pDisplay);
			    }
                        }
                    }
#endi