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{
        ulong* anAlphaData = new ulong[mWidth*mHeight]; 

        if (theNumBits == 16)
        {
                for (int i = 0; i < mWidth*mHeight; i++)
                {
                        ulong val = NEXT_SRC_COLOR;

                        int anAlpha = val >> 24;

                        int r = ((val >> 16) & 0xFF) * anAlpha >> 8;
                        int g = ((val >> 8 ) & 0xFF) * anAlpha >> 8;
                        int b = ((val      ) & 0xFF) * anAlpha >> 8;

                        anAlphaData[i] =
                                ((((r * theRMask) >> 8) & theRMask) |
                                (((g * theGMask) >> 8) & theGMask) |
                                (((b * theBMask) >> 8) & theBMask) |
                                (anAlpha << 24));
                }
        }
        else if (theNumBits == 32)
        {
                for (int i = 0; i < mWidth*mHeight; i++)
                {
                        ulong val = NEXT_SRC_COLOR;

                        int anAlpha = val >> 24;                        

                        int r = (((val >> 16) & 0xFF) * anAlpha) >> 8;
                        int g = (((val >> 8 ) & 0xFF) * anAlpha) >> 8;
                        int b = (((val      ) & 0xFF) * anAlpha) >> 8;                  

                        anAlphaData[i] =
                                (((r * theRMask) >> 8) & theRMask) |
                                (((g * theGMask) >> 8) & theGMask) |
                                (((b * theBMask) >> 8) & theBMask) |
                                (anAlpha << 24);
                }
        }
        
        mNativeAlphaData = anAlphaData; 
}