view release on metacpan or  search on metacpan

src/Source/LibJXR/jxrgluelib/JXRGlueJxr.c  view on Meta::CPAN

	if (pID->WMP.wmiI.cThumbnailWidth > 0)
	{
		while(cThumbnailScale * pID->WMP.wmiI.cThumbnailWidth < pID->uWidth)
			cThumbnailScale <<= 1;
	}
    // note the following implementation can't handle fractional linesperMBRow limiting
    // us to >= 1/256 thumbnail which is unfortunate, but all the PS plugin needs is 1/256
    // and I didn't care to get into floating point or a bunch of conditional tests or
    // other rewrite for a case not needed nor tested by PS plugin.  sorry.
    linesperMBRow = 16 / cThumbnailScale;

#ifdef REENTRANT_MODE
    if (0 == pID->WMP.DecoderCurrMBRow) 
    {
#endif // REENTRANT_MODE
    // Set the fPaddedUserBuffer if the following conditions are met
    if (0 == ((size_t)pb % 128) &&    // Frame buffer is aligned to 128-byte boundary
        0 == (pRect->Height % 16) &&        // Horizontal resolution is multiple of 16
        0 == (pRect->Width % 16) &&        // Vertical resolution is multiple of 16
        0 == (cbStride % 128))              // Stride is a multiple of 128 bytes
    {
        pID->WMP.wmiI.fPaddedUserBuffer = TRUE;
        // Note that there are additional conditions in strdec_x86.c's strDecOpt
        // which could prevent optimization from being engaged
    }
#ifdef REENTRANT_MODE
    }
#endif // REENTRANT_MODE
    //if(pID->WMP.wmiSCP.uAlphaMode != 1)
    if((!pID->WMP.bHasAlpha) || (pID->WMP.wmiSCP.uAlphaMode != 1))
    {
        if(pID->WMP.bHasAlpha)//planar alpha
        {
            tempAlphaMode = pID->WMP.wmiSCP.uAlphaMode;
            pID->WMP.wmiSCP.uAlphaMode = 0;
        }
        pID->WMP.wmiSCP.fMeasurePerf = TRUE;
#ifdef REENTRANT_MODE
        if (0 == pID->WMP.DecoderCurrMBRow) 
        {
            Call(pID->WMP.wmiSCP.pWStream->GetPos(pID->WMP.wmiSCP.pWStream, &(pID->WMP.cMarker)));
            FailIf(ICERR_OK != ImageStrDecInit(&pID->WMP.wmiI, &pID->WMP.wmiSCP, &pID->WMP.ctxSC), WMP_errFail);
        }
        // Re-entrant mode incurs 1 MBR delay, so to get 0th MBR, we have to ask for 1st MBR
        cMBRow = ((U32) pID->WMP.cLinesCropped + pRect->Y + pRect->Height +          
            (pRect->Y + pRect->Height >= (I32) pID->WMP.wmiI.cROIHeight ? linesperMBRow - 1 : 0)) / // round up if last MBR
            linesperMBRow + 1;
        cMBRowStart = ((U32) pID->WMP.cLinesCropped + pRect->Y) / linesperMBRow + 1;
        // if current request starts before current state, then rewind.
        if (cMBRowStart < pID->WMP.DecoderCurrMBRow) 
        {
            pID->WMP.DecoderCurrMBRow = 0;
            pID->WMP.cLinesDecoded = 0;
            pID->WMP.cLinesCropped = 0;
            pID->WMP.fFirstNonZeroDecode = FALSE;
            FailIf(ICERR_OK != ImageStrDecTerm(pID->WMP.ctxSC), WMP_errFail);   
            Call(pID->WMP.wmiSCP.pWStream->SetPos(pID->WMP.wmiSCP.pWStream, pID->WMP.cMarker));
            FailIf(ICERR_OK != ImageStrDecInit(&pID->WMP.wmiI, &pID->WMP.wmiSCP, &pID->WMP.ctxSC), WMP_errFail);
        }

        // In "Low Memory mode", we don't have full frame buffer. We therefore cannot rotate the image.
        // We can flip H, V and HV, but no rotations.
        FailIf(pID->WMP.wmiI.oOrientation >= O_RCW, WMP_errFail);

        // In low-memory mode, the full frame buffer is unavailable. This doesn't seem to
        // matter in O_NONE and O_FLIPH, but for O_FLIPV and O_FLIPVH, outputMBRow tries to write to
        // the bottom of full-frame buffer. Adjust the buffer pointer to compensate.
        if (O_FLIPV == pID->WMP.wmiI.oOrientation || O_FLIPVH == pID->WMP.wmiI.oOrientation)
        {
            I32 iActualY2 = pRect->Y + pRect->Height;
            pbLowMemAdj = pb - (pID->WMP.wmiI.cROIHeight - (iActualY2 - pID->WMP.cLinesCropped)) * cbStride;
        }
        else
        {
            pbLowMemAdj = pb - pRect->Y * cbStride;
        }
        wmiBI.pv = pbLowMemAdj;

        for (i = (U32)pID->WMP.DecoderCurrMBRow; i < cMBRow; i++)
        {
            size_t cLinesDecoded;
            wmiBI.uiFirstMBRow = i;
            wmiBI.uiLastMBRow = i;
            FailIf(ICERR_OK != ImageStrDecDecode(pID->WMP.ctxSC, &wmiBI, &cLinesDecoded), WMP_errFail);
            pID->WMP.cLinesDecoded = cLinesDecoded;
            if (FALSE == pID->WMP.fFirstNonZeroDecode && cLinesDecoded > 0)
            {
                pID->WMP.cLinesCropped += (linesperMBRow - cLinesDecoded);
                pID->WMP.fFirstNonZeroDecode = TRUE;
                // update cMBRow if partial MB row cropped
                cMBRow = ((U32) pID->WMP.cLinesCropped + pRect->Y + pRect->Height +          
                    (pRect->Y + pRect->Height >= (I32) pID->WMP.wmiI.cROIHeight ? linesperMBRow - 1 : 0)) / // round up if last MBR
                    linesperMBRow + 1;
            }

            if (0 == cLinesDecoded && i > 0)
            {
                pID->WMP.cLinesCropped += linesperMBRow;
                // update cMBRow if whole MB row cropped
                cMBRow++;
            }
        }
        wmiBI.pv = pbLowMemAdj;

        // If we're past the top of the image, then we're done, so terminate.
        if (linesperMBRow * (cMBRow - 1) >= (U32) pID->WMP.cLinesCropped + pID->WMP.wmiI.cROIHeight) {
            FailIf(ICERR_OK != ImageStrDecTerm(pID->WMP.ctxSC), WMP_errFail);        
        }
        pID->WMP.DecoderCurrMBRow = cMBRow; // Set to next possible MBRow that is decodable

#else
        FailIf(ICERR_OK != ImageStrDecInit(&pID->WMP.wmiI, &pID->WMP.wmiSCP, &pID->WMP.ctxSC), WMP_errFail);
        FailIf(ICERR_OK != ImageStrDecDecode(pID->WMP.ctxSC, &wmiBI), WMP_errFail);
        FailIf(ICERR_OK != ImageStrDecTerm(pID->WMP.ctxSC), WMP_errFail);
#endif //REENTRANT_MODE

        if(pID->WMP.bHasAlpha)//planar alpha
        {
            pID->WMP.wmiSCP.uAlphaMode = tempAlphaMode;
        }
    }

//    if(pID->WMP.bHasAlpha && pID->WMP.wmiSCP.uAlphaMode == 2)
//    if(pID->WMP.bHasAlpha && pID->WMP.wmiSCP.uAlphaMode != 1)
    if(pID->WMP.bHasAlpha && pID->WMP.wmiSCP.uAlphaMode != 0)
    {
        pID->WMP.wmiI_Alpha = pID->WMP.wmiI;