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244 chris 1 
{
2 
	double aCos = cos(theRot);
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	double aSin = sin(theRot);
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	int aCosLong = (int) (aCos * 0x10000);
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	int aSinLong = (int) (aSin * 0x10000);
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	ulong* aDestPixelsRow = GetBits() + ((int)aDestRect.mY * mWidth) + (int)aDestRect.mX;
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	int aDestPixelsPitch = mWidth;
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	if (theColor == Color::White)
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	{
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		#define DEST_PIXEL_TYPE ulong
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		#define WRITE_PIXEL\
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		{\
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			int a = a1+a2+a3+a4;			\
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			if(a==0) /* transparent */ \
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				aDestPixels++; \
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			else \
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			{ \
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				ulong r = (((((src1&0xFF0000)*a1)) + (((src2&0xFF0000)*a2)) + (((src3&0xFF0000)*a3)) + (((src4&0xFF0000)*a4)))&0xFF000000); \
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				ulong g = (((((src1&0x00FF00)*a1)) + (((src2&0x00FF00)*a2)) + (((src3&0x00FF00)*a3)) + (((src4&0x00FF00)*a4)))&0x00FF0000); \
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				ulong b = (((((src1&0x0000FF)*a1)) + (((src2&0x0000FF)*a2)) + (((src3&0x0000FF)*a3)) + (((src4&0x0000FF)*a4)))&0x0000FF00); \
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				if(a > 250) /* opaque */ \
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					*aDestPixels++ = 0xFF000000 | (r>>8) | (g>>8) | (b>>8);\
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				else /* blend */ \
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				{\
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					ulong destPixel = *aDestPixels; \
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					ulong da = destPixel >> 24;\
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					\
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					ulong dr = (((destPixel&0xFF0000)*da)>>8) & 0xFF0000;\
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					ulong dg = (((destPixel&0x00FF00)*da)>>8) & 0x00FF00;\
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					ulong db = (((destPixel&0x0000FF)*da)>>8) & 0x0000FF;\
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					\
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					int finalAlpha = 256 - (((256 - a)*(256 - da))>>8);\
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					r = ((r + (256-a)*dr)/finalAlpha) & 0xFF0000;\
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					g = ((g + (256-a)*dg)/finalAlpha) & 0x00FF00;\
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					b = ((b + (256-a)*db)/finalAlpha) & 0x0000FF;\
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					\
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					*aDestPixels++ = ((finalAlpha-1)<<24) | r | g | b;					\
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				}\
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			}	\
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		}
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		#include "BltRotatedHelper.inc"
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		#undef WRITE_PIXEL
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		#undef DEST_PIXEL_TYPE
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	}
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	else
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	{
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		int ca = theColor.mAlpha;
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		int cr = theColor.mRed + 1;
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		int cg = theColor.mGreen + 1;
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		int cb = theColor.mBlue + 1;
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		#define DEST_PIXEL_TYPE ulong
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		#define WRITE_PIXEL\
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		{\
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			a1 = (a1*ca)>>8; a2 = (a2*ca)>>8; a3 = (a3*ca)>>8; a4 = (a4*ca)>>8; \
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			int a = a1+a2+a3+a4;			\
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			\
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			if(a==0) /* transparent */ \
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				aDestPixels++; \
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			else \
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			{ \
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				ulong r = (cr * (((((src1&0xFF0000)*a1)) + (((src2&0xFF0000)*a2)) + (((src3&0xFF0000)*a3)) + (((src4&0xFF0000)*a4)))>>8)) & 0xFF000000 ; \
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				ulong g = ((((((src1&0x00FF00)*a1)) + (((src2&0x00FF00)*a2)) + (((src3&0x00FF00)*a3)) + (((src4&0x00FF00)*a4)))&0x00FF0000) * cg) & 0xFF000000; \
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				ulong b = ((((((src1&0x0000FF)*a1)) + (((src2&0x0000FF)*a2)) + (((src3&0x0000FF)*a3)) + (((src4&0x0000FF)*a4)))&0x0000FF00) * cb) & 0x00FF0000; \
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				if(a > 250) /* opaque */ \
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					*aDestPixels++ = 0xFF000000 | (r>>8) | (g>>16) | (b>>16);\
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				else /* blend */ \
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				{\
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					ulong destPixel = *aDestPixels; \
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					ulong da = destPixel >> 24;\
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					\
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					ulong dr = (((destPixel&0xFF0000)*da)>>8) & 0xFF0000;\
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					ulong dg = (((destPixel&0x00FF00)*da)>>8) & 0x00FF00;\
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					ulong db = (((destPixel&0x0000FF)*da)>>8) & 0x0000FF;\
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					\
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					int finalAlpha = 256 - (((256 - a)*(256 - da))>>8);\
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					r = ((r + (256-a)*dr)/finalAlpha) & 0xFF0000;\
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					g = (((g>>8) + (256-a)*dg)/finalAlpha) & 0x00FF00;\
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					b = (((b>>8) + (256-a)*db)/finalAlpha) & 0x0000FF;\
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					\
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					*aDestPixels++ = ((finalAlpha-1)<<24) | r | g | b;					\
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				}\
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			}	\
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		}
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		#include "BltRotatedHelper.inc"
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96 
		#undef WRITE_PIXEL
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		#undef DEST_PIXEL_TYPE
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99 
 
100 
	}
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}