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/*
SDL_imageFilter - bytes-image "filter" routines
(uses inline x86 MMX optimizations if available)
LGPL (c) A. Schiffler
*/
#ifndef _SDL_imageFilter_h
#define _SDL_imageFilter_h
/* Set up for C function definitions, even when using C++ */
#ifdef __cplusplus
extern "C" {
#endif
/* ------ Function Prototypes ------ */
#ifdef WIN32
#ifdef BUILD_DLL
#define DLLINTERFACE __declspec(dllexport)
#else
#define DLLINTERFACE __declspec(dllimport)
#endif
#else
#define DLLINTERFACE
#endif
/* Comments: */
/* 1.) MMX functions work best if all data blocks are aligned on a 32 bytes boundary. */
/* 2.) Data that is not within an 8 byte boundary is processed using the C routine. */
/* 3.) Convolution routines do not have C routines at this time. */
// Detect MMX capability in CPU
DLLINTERFACE int SDL_imageFilterMMXdetect(void);
// Force use of MMX off (or turn possible use back on)
DLLINTERFACE void SDL_imageFilterMMXoff(void);
DLLINTERFACE void SDL_imageFilterMMXon(void);
//
// All routines return:
// 0 OK
// -1 Error (internal error, parameter error)
//
// SDL_imageFilterAdd: D = saturation255(S1 + S2)
DLLINTERFACE int SDL_imageFilterAdd(unsigned char *Src1, unsigned char *Src2, unsigned char *Dest, int length);
// SDL_imageFilterMean: D = S1/2 + S2/2
DLLINTERFACE int SDL_imageFilterMean(unsigned char *Src1, unsigned char *Src2, unsigned char *Dest, int length);
// SDL_imageFilterSub: D = saturation0(S1 - S2)
DLLINTERFACE int SDL_imageFilterSub(unsigned char *Src1, unsigned char *Src2, unsigned char *Dest, int length);
// SDL_imageFilterAbsDiff: D = | S1 - S2 |
DLLINTERFACE int SDL_imageFilterAbsDiff(unsigned char *Src1, unsigned char *Src2, unsigned char *Dest, int length);
// SDL_imageFilterMult: D = saturation(S1 * S2)
DLLINTERFACE int SDL_imageFilterMult(unsigned char *Src1, unsigned char *Src2, unsigned char *Dest, int length);
// SDL_imageFilterMultNor: D = S1 * S2 (non-MMX)
DLLINTERFACE int SDL_imageFilterMultNor(unsigned char *Src1, unsigned char *Src2, unsigned char *Dest, int length);
// SDL_imageFilterMultDivby2: D = saturation255(S1/2 * S2)
DLLINTERFACE int SDL_imageFilterMultDivby2(unsigned char *Src1, unsigned char *Src2, unsigned char *Dest,
int length);
// SDL_imageFilterMultDivby4: D = saturation255(S1/2 * S2/2)
DLLINTERFACE int SDL_imageFilterMultDivby4(unsigned char *Src1, unsigned char *Src2, unsigned char *Dest,
int length);
// SDL_imageFilterBitAnd: D = S1 & S2
DLLINTERFACE int SDL_imageFilterBitAnd(unsigned char *Src1, unsigned char *Src2, unsigned char *Dest, int length);
// SDL_imageFilterBitOr: D = S1 | S2
DLLINTERFACE int SDL_imageFilterBitOr(unsigned char *Src1, unsigned char *Src2, unsigned char *Dest, int length);
// SDL_imageFilterDiv: D = S1 / S2 (non-MMX)
DLLINTERFACE int SDL_imageFilterDiv(unsigned char *Src1, unsigned char *Src2, unsigned char *Dest, int length);
// SDL_imageFilterBitNegation: D = !S
DLLINTERFACE int SDL_imageFilterBitNegation(unsigned char *Src1, unsigned char *Dest, int length);
// SDL_imageFilterAddByte: D = saturation255(S + C)
DLLINTERFACE int SDL_imageFilterAddByte(unsigned char *Src1, unsigned char *Dest, int length, unsigned char C);
// SDL_imageFilterAddByteToHalf: D = saturation255(S/2 + C)
DLLINTERFACE int SDL_imageFilterAddByteToHalf(unsigned char *Src1, unsigned char *Dest, int length,
unsigned char C);
// SDL_imageFilterSubByte: D = saturation0(S - C)
DLLINTERFACE int SDL_imageFilterSubByte(unsigned char *Src1, unsigned char *Dest, int length, unsigned char C);
// SDL_imageFilterShiftRight: D = saturation0(S >> N)
DLLINTERFACE int SDL_imageFilterShiftRight(unsigned char *Src1, unsigned char *Dest, int length, unsigned char N);
// SDL_imageFilterMultByByte: D = saturation255(S * C)
DLLINTERFACE int SDL_imageFilterMultByByte(unsigned char *Src1, unsigned char *Dest, int length, unsigned char C);
// SDL_imageFilterShiftRightAndMultByByte: D = saturation255((S >> N) * C)
DLLINTERFACE int SDL_imageFilterShiftRightAndMultByByte(unsigned char *Src1, unsigned char *Dest, int length,
unsigned char N, unsigned char C);
// SDL_imageFilterShiftLeftByte: D = (S << N)
DLLINTERFACE int SDL_imageFilterShiftLeftByte(unsigned char *Src1, unsigned char *Dest, int length,
unsigned char N);
// SDL_imageFilterShiftLeft: D = saturation255(S << N)
DLLINTERFACE int SDL_imageFilterShiftLeft(unsigned char *Src1, unsigned char *Dest, int length, unsigned char N);
// SDL_imageFilterBinarizeUsingThreshold: D = S >= T ? 255:0
DLLINTERFACE int SDL_imageFilterBinarizeUsingThreshold(unsigned char *Src1, unsigned char *Dest, int length,
unsigned char T);
// SDL_imageFilterClipToRange: D = (S >= Tmin) & (S <= Tmax) 255:0
DLLINTERFACE int SDL_imageFilterClipToRange(unsigned char *Src1, unsigned char *Dest, int length,
unsigned char Tmin, unsigned char Tmax);
// SDL_imageFilterNormalizeLinear: D = saturation255((Nmax - Nmin)/(Cmax - Cmin)*(S - Cmin) + Nmin)
DLLINTERFACE int SDL_imageFilterNormalizeLinear(unsigned char *Src1, unsigned char *Dest, int length, int Cmin,
int Cmax, int Nmin, int Nmax);
/* !!! NO C-ROUTINE FOR THESE FUNCTIONS YET !!! */
// SDL_imageFilterConvolveKernel3x3Divide: Dij = saturation0and255( ... )
DLLINTERFACE int SDL_imageFilterConvolveKernel3x3Divide(unsigned char *Src, unsigned char *Dest, int rows,
int columns, signed short *Kernel, unsigned char Divisor);
// SDL_imageFilterConvolveKernel5x5Divide: Dij = saturation0and255( ... )
DLLINTERFACE int SDL_imageFilterConvolveKernel5x5Divide(unsigned char *Src, unsigned char *Dest, int rows,
int columns, signed short *Kernel, unsigned char Divisor);
// SDL_imageFilterConvolveKernel7x7Divide: Dij = saturation0and255( ... )
DLLINTERFACE int SDL_imageFilterConvolveKernel7x7Divide(unsigned char *Src, unsigned char *Dest, int rows,
int columns, signed short *Kernel, unsigned char Divisor);
// SDL_imageFilterConvolveKernel9x9Divide: Dij = saturation0and255( ... )
DLLINTERFACE int SDL_imageFilterConvolveKernel9x9Divide(unsigned char *Src, unsigned char *Dest, int rows,
int columns, signed short *Kernel, unsigned char Divisor);
// SDL_imageFilterConvolveKernel3x3ShiftRight: Dij = saturation0and255( ... )
DLLINTERFACE int SDL_imageFilterConvolveKernel3x3ShiftRight(unsigned char *Src, unsigned char *Dest, int rows,
int columns, signed short *Kernel,
unsigned char NRightShift);
// SDL_imageFilterConvolveKernel5x5ShiftRight: Dij = saturation0and255( ... )
DLLINTERFACE int SDL_imageFilterConvolveKernel5x5ShiftRight(unsigned char *Src, unsigned char *Dest, int rows,
int columns, signed short *Kernel,
unsigned char NRightShift);
// SDL_imageFilterConvolveKernel7x7ShiftRight: Dij = saturation0and255( ... )
DLLINTERFACE int SDL_imageFilterConvolveKernel7x7ShiftRight(unsigned char *Src, unsigned char *Dest, int rows,
int columns, signed short *Kernel,
unsigned char NRightShift);
// SDL_imageFilterConvolveKernel9x9ShiftRight: Dij = saturation0and255( ... )
DLLINTERFACE int SDL_imageFilterConvolveKernel9x9ShiftRight(unsigned char *Src, unsigned char *Dest, int rows,
int columns, signed short *Kernel,
unsigned char NRightShift);
// SDL_imageFilterSobelX: Dij = saturation255( ... )
DLLINTERFACE int SDL_imageFilterSobelX(unsigned char *Src, unsigned char *Dest, int rows, int columns);
// SDL_imageFilterSobelXShiftRight: Dij = saturation255( ... )
DLLINTERFACE int SDL_imageFilterSobelXShiftRight(unsigned char *Src, unsigned char *Dest, int rows, int columns,
unsigned char NRightShift);
// Align/restore stack to 32 byte boundary -- Functionality untested! --
DLLINTERFACE void SDL_imageFilterAlignStack(void);
DLLINTERFACE void SDL_imageFilterRestoreStack(void);
/* Ends C function definitions when using C++ */
#ifdef __cplusplus
}
#endif
#endif /* _SDL_imageFilter_h */
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