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{               
        
        uchar* aWPtr = mRLAlphaData;
        
        if (mWidth==1)
        {
                memset(aWPtr,1,mHeight);
        }
        else
        {
                for (int aRow = 0; aRow < mHeight; aRow++)                      
                {
                        int aRCount = 1;
                        int aRLCount = 1;

                        int anAVal = NEXT_SRC_COLOR >> 24;
                        int aLastAClass = (anAVal == 0) ? 0 : (anAVal == 255) ? 1 : 2;

                        while (aRCount < mWidth)
                        {
                                aRCount++;                              

                                anAVal = NEXT_SRC_COLOR >> 24;
                                int aThisAClass = (anAVal == 0) ? 0 : (anAVal == 255) ? 1 : 2;

                                if ((aThisAClass != aLastAClass) || (aRCount == mWidth))
                                {
                                        if (aThisAClass == aLastAClass)
                                                aRLCount++;

                                        for (int i = aRLCount; i > 0; i--)
                                        {
                                                if (i >= 255)
                                                        *aWPtr++ = 255;
                                                else
                                                        *aWPtr++ = i;
                                        }                                       

                                        if ((aRCount == mWidth) && (aThisAClass != aLastAClass))
                                                *aWPtr++ = 1;

                                        aLastAClass = aThisAClass;
                                        aRLCount = 1;
                                }
                                else
                                {
                                        aRLCount++;
                                }
                        }
                }
        }
}