143 lines
7.4 KiB
C
143 lines
7.4 KiB
C
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//////////////////////////////////////////////////////////////////////////////
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//
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// this code dither a 256 color DIB bitmap down to the VGA 16 colors.
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//
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//////////////////////////////////////////////////////////////////////////////
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typedef void (FAR PASCAL *DITHERPROC)(
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LPBITMAPINFOHEADER biDst, // --> BITMAPINFO of the dest
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LPVOID lpDst, // --> to destination bits
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int DstX, // Destination origin - x coordinate
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int DstY, // Destination origin - y coordinate
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int DstXE, // x extent of the BLT
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int DstYE, // y extent of the BLT
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LPBITMAPINFOHEADER biSrc, // --> BITMAPINFO of the source
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LPVOID lpSrc, // --> to source bits
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int SrcX, // Source origin - x coordinate
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int SrcY, // Source origin - y coordinate
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LPVOID lpDitherTable); // dither table.
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//
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// call DitherInit() to set up the 16k dither table.
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// you need to call DitherInit() whenever the source colors
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// change. DitherInit() returns a pointer to the dither table
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//
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extern LPVOID VFWAPI DitherInit(LPBITMAPINFOHEADER lpbiIn, LPBITMAPINFOHEADER lpbiOut, DITHERPROC FAR *lpDitherProc, LPVOID lpDitherTable);
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extern void VFWAPI DitherTerm(LPVOID lpDitherTable);
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extern LPVOID FAR PASCAL Dither8Init(LPBITMAPINFOHEADER lpbi, LPBITMAPINFOHEADER lpbiOut, DITHERPROC FAR *lpDitherProc, LPVOID lpDitherTable);
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extern void FAR PASCAL Dither8Term(LPVOID lpDitherTable);
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extern LPVOID FAR PASCAL DitherDeviceInit(LPBITMAPINFOHEADER lpbi, LPBITMAPINFOHEADER lpbiOut, DITHERPROC FAR *lpDitherProc, LPVOID lpDitherTable);
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extern LPVOID FAR PASCAL Dither16Init(LPBITMAPINFOHEADER lpbi, LPBITMAPINFOHEADER lpbiOut, DITHERPROC FAR *lpDitherProc, LPVOID lpDitherTable);
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extern void FAR PASCAL Dither16Term(LPVOID lpDitherTable);
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extern LPVOID FAR PASCAL Dither24Init(LPBITMAPINFOHEADER lpbi, LPBITMAPINFOHEADER lpbiOut, DITHERPROC FAR *lpDitherProc, LPVOID lpDitherTable);
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extern void FAR PASCAL Dither24Term(LPVOID lpDitherTable);
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extern LPVOID FAR PASCAL Dither32Init(LPBITMAPINFOHEADER lpbi, LPBITMAPINFOHEADER lpbiOut, DITHERPROC FAR *lpDitherProc, LPVOID lpDitherTable);
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extern void FAR PASCAL Dither32Term(LPVOID lpDitherTable);
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extern void FAR PASCAL DitherTableFree(void);
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//extern HPALETTE FAR CreateDith775Palette(void); // (in dith775.c)
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//
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// call this to actualy do the dither. (in dither8.asm)
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//
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extern void FAR PASCAL Dither8(
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LPBITMAPINFOHEADER biDst, // --> BITMAPINFO of the dest
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LPVOID lpDst, // --> to destination bits
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int DstX, // Destination origin - x coordinate
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int DstY, // Destination origin - y coordinate
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int DstXE, // x extent of the BLT
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int DstYE, // y extent of the BLT
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LPBITMAPINFOHEADER biSrc, // --> BITMAPINFO of the source
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LPVOID lpSrc, // --> to source bits
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int SrcX, // Source origin - x coordinate
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int SrcY, // Source origin - y coordinate
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LPVOID lpDitherTable); // dither table.
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//
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// call this to actualy do the dither. (in dither.c)
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//
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extern void FAR PASCAL Dither8C(
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LPBITMAPINFOHEADER biDst, // --> BITMAPINFO of the dest
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LPVOID lpDst, // --> to destination bits
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int DstX, // Destination origin - x coordinate
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int DstY, // Destination origin - y coordinate
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int DstXE, // x extent of the BLT
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int DstYE, // y extent of the BLT
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LPBITMAPINFOHEADER biSrc, // --> BITMAPINFO of the source
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LPVOID lpSrc, // --> to source bits
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int SrcX, // Source origin - x coordinate
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int SrcY, // Source origin - y coordinate
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LPVOID lpDitherTable); // dither table.
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//
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// call this to actualy do the dither. (in dith775.c)
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//
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extern void FAR PASCAL Dither16(
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LPBITMAPINFOHEADER biDst, // --> BITMAPINFO of the dest
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LPVOID lpDst, // --> to destination bits
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int DstX, // Destination origin - x coordinate
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int DstY, // Destination origin - y coordinate
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int DstXE, // x extent of the BLT
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int DstYE, // y extent of the BLT
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LPBITMAPINFOHEADER biSrc, // --> BITMAPINFO of the source
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LPVOID lpSrc, // --> to source bits
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int SrcX, // Source origin - x coordinate
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int SrcY, // Source origin - y coordinate
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LPVOID lpDitherTable); // dither table.
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//
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// call this to actualy do the dither. (in dith775.c)
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//
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extern void FAR PASCAL Dither24(
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LPBITMAPINFOHEADER biDst, // --> BITMAPINFO of the dest
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LPVOID lpDst, // --> to destination bits
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int DstX, // Destination origin - x coordinate
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int DstY, // Destination origin - y coordinate
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int DstXE, // x extent of the BLT
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int DstYE, // y extent of the BLT
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LPBITMAPINFOHEADER biSrc, // --> BITMAPINFO of the source
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LPVOID lpSrc, // --> to source bits
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int SrcX, // Source origin - x coordinate
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int SrcY, // Source origin - y coordinate
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LPVOID lpDitherTable); // dither table.
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//
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// call this to map 16 bpp DIBs to 24bit (in mapa.asm)
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//
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extern void FAR PASCAL Map16to24(
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LPBITMAPINFOHEADER biDst, // --> BITMAPINFO of the dest
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LPVOID lpDst, // --> to destination bits
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int DstX, // Destination origin - x coordinate
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int DstY, // Destination origin - y coordinate
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int DstXE, // x extent of the BLT
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int DstYE, // y extent of the BLT
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LPBITMAPINFOHEADER biSrc, // --> BITMAPINFO of the source
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LPVOID lpSrc, // --> to source bits
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int SrcX, // Source origin - x coordinate
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int SrcY, // Source origin - y coordinate
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LPVOID lpDitherTable); // dither table.
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//
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// call this to map 32 bpp DIBs to 24bit (in mapa.asm)
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//
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extern void FAR PASCAL Map32to24(
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LPBITMAPINFOHEADER biDst, // --> BITMAPINFO of the dest
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LPVOID lpDst, // --> to destination bits
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int DstX, // Destination origin - x coordinate
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int DstY, // Destination origin - y coordinate
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int DstXE, // x extent of the BLT
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int DstYE, // y extent of the BLT
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LPBITMAPINFOHEADER biSrc, // --> BITMAPINFO of the source
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LPVOID lpSrc, // --> to source bits
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int SrcX, // Source origin - x coordinate
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int SrcY, // Source origin - y coordinate
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LPVOID lpDitherTable); // dither table.
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