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