Macros
#define	SDL2_IMAGEFILTER_SCOPE extern

Functions
SDL2_IMAGEFILTER_SCOPE int	SDL_imageFilterMMXdetect (void)
	MMX detection routine (with override flag). More...

SDL2_IMAGEFILTER_SCOPE void	SDL_imageFilterMMXoff (void)
	Disable MMX check for filter functions and and force to use non-MMX C based code. More...

SDL2_IMAGEFILTER_SCOPE void	SDL_imageFilterMMXon (void)
	Enable MMX check for filter functions and use MMX code if available. More...

SDL2_IMAGEFILTER_SCOPE int	SDL_imageFilterAdd (unsigned char Src1, unsigned char Src2, unsigned char *Dest, unsigned int length)
	Filter using Add: D = saturation255(S1 + S2) More...

SDL2_IMAGEFILTER_SCOPE int	SDL_imageFilterMean (unsigned char Src1, unsigned char Src2, unsigned char *Dest, unsigned int length)
	Filter using Mean: D = S1/2 + S2/2. More...

SDL2_IMAGEFILTER_SCOPE int	SDL_imageFilterSub (unsigned char Src1, unsigned char Src2, unsigned char *Dest, unsigned int length)
	Filter using Sub: D = saturation0(S1 - S2) More...

SDL2_IMAGEFILTER_SCOPE int	SDL_imageFilterAbsDiff (unsigned char Src1, unsigned char Src2, unsigned char *Dest, unsigned int length)
	Filter using AbsDiff: D = \| S1 - S2 \|. More...

SDL2_IMAGEFILTER_SCOPE int	SDL_imageFilterMult (unsigned char Src1, unsigned char Src2, unsigned char *Dest, unsigned int length)
	Filter using Mult: D = saturation255(S1 * S2) More...

SDL2_IMAGEFILTER_SCOPE int	SDL_imageFilterMultNor (unsigned char Src1, unsigned char Src2, unsigned char *Dest, unsigned int length)
	Filter using MultNor: D = S1 * S2. More...

SDL2_IMAGEFILTER_SCOPE int	SDL_imageFilterMultDivby2 (unsigned char Src1, unsigned char Src2, unsigned char *Dest, unsigned int length)
	Filter using MultDivby2: D = saturation255(S1/2 * S2) More...

SDL2_IMAGEFILTER_SCOPE int	SDL_imageFilterMultDivby4 (unsigned char Src1, unsigned char Src2, unsigned char *Dest, unsigned int length)
	Filter using MultDivby4: D = saturation255(S1/2 * S2/2) More...

SDL2_IMAGEFILTER_SCOPE int	SDL_imageFilterBitAnd (unsigned char Src1, unsigned char Src2, unsigned char *Dest, unsigned int length)
	Filter using BitAnd: D = S1 & S2. More...

SDL2_IMAGEFILTER_SCOPE int	SDL_imageFilterBitOr (unsigned char Src1, unsigned char Src2, unsigned char *Dest, unsigned int length)
	Filter using BitOr: D = S1 \| S2. More...

SDL2_IMAGEFILTER_SCOPE int	SDL_imageFilterDiv (unsigned char Src1, unsigned char Src2, unsigned char *Dest, unsigned int length)
	Filter using Div: D = S1 / S2. More...

SDL2_IMAGEFILTER_SCOPE int	SDL_imageFilterBitNegation (unsigned char Src1, unsigned char Dest, unsigned int length)
	Filter using BitNegation: D = !S. More...

SDL2_IMAGEFILTER_SCOPE int	SDL_imageFilterAddByte (unsigned char Src1, unsigned char Dest, unsigned int length, unsigned char C)
	Filter using AddByte: D = saturation255(S + C) More...

SDL2_IMAGEFILTER_SCOPE int	SDL_imageFilterAddUint (unsigned char Src1, unsigned char Dest, unsigned int length, unsigned int C)
	Filter using AddUint: D = saturation255((S[i] + Cs[i % 4]), Cs=Swap32((uint)C) More...

SDL2_IMAGEFILTER_SCOPE int	SDL_imageFilterAddByteToHalf (unsigned char Src1, unsigned char Dest, unsigned int length, unsigned char C)
	Filter using AddByteToHalf: D = saturation255(S/2 + C) More...

SDL2_IMAGEFILTER_SCOPE int	SDL_imageFilterSubByte (unsigned char Src1, unsigned char Dest, unsigned int length, unsigned char C)
	Filter using SubByte: D = saturation0(S - C) More...

SDL2_IMAGEFILTER_SCOPE int	SDL_imageFilterSubUint (unsigned char Src1, unsigned char Dest, unsigned int length, unsigned int C)
	Filter using SubUint: D = saturation0(S[i] - Cs[i % 4]), Cs=Swap32((uint)C) More...

SDL2_IMAGEFILTER_SCOPE int	SDL_imageFilterShiftRight (unsigned char Src1, unsigned char Dest, unsigned int length, unsigned char N)
	Filter using ShiftRight: D = saturation0(S >> N) More...

SDL2_IMAGEFILTER_SCOPE int	SDL_imageFilterShiftRightUint (unsigned char Src1, unsigned char Dest, unsigned int length, unsigned char N)
	Filter using ShiftRightUint: D = saturation0((uint)S[i] >> N) More...

SDL2_IMAGEFILTER_SCOPE int	SDL_imageFilterMultByByte (unsigned char Src1, unsigned char Dest, unsigned int length, unsigned char C)
	Filter using MultByByte: D = saturation255(S * C) More...

SDL2_IMAGEFILTER_SCOPE int	SDL_imageFilterShiftRightAndMultByByte (unsigned char Src1, unsigned char Dest, unsigned int length, unsigned char N, unsigned char C)
	Filter using ShiftRightAndMultByByte: D = saturation255((S >> N) * C) More...

SDL2_IMAGEFILTER_SCOPE int	SDL_imageFilterShiftLeftByte (unsigned char Src1, unsigned char Dest, unsigned int length, unsigned char N)
	Filter using ShiftLeftByte: D = (S << N) More...

SDL2_IMAGEFILTER_SCOPE int	SDL_imageFilterShiftLeftUint (unsigned char Src1, unsigned char Dest, unsigned int length, unsigned char N)
	Filter using ShiftLeftUint: D = ((uint)S << N) More...

SDL2_IMAGEFILTER_SCOPE int	SDL_imageFilterShiftLeft (unsigned char Src1, unsigned char Dest, unsigned int length, unsigned char N)
	Filter ShiftLeft: D = saturation255(S << N) More...

SDL2_IMAGEFILTER_SCOPE int	SDL_imageFilterBinarizeUsingThreshold (unsigned char Src1, unsigned char Dest, unsigned int length, unsigned char T)
	Filter using BinarizeUsingThreshold: D = (S >= T) ? 255:0. More...

SDL2_IMAGEFILTER_SCOPE int	SDL_imageFilterClipToRange (unsigned char Src1, unsigned char Dest, unsigned int length, unsigned char Tmin, unsigned char Tmax)
	Filter using ClipToRange: D = (S >= Tmin) & (S <= Tmax) S:Tmin \| Tmax. More...

SDL2_IMAGEFILTER_SCOPE int	SDL_imageFilterNormalizeLinear (unsigned char Src, unsigned char Dest, unsigned int length, int Cmin, int Cmax, int Nmin, int Nmax)
	Filter using NormalizeLinear: D = saturation255((Nmax - Nmin)/(Cmax - Cmin)*(S - Cmin) + Nmin) More...

Macro Definition Documentation

◆ SDL2_IMAGEFILTER_SCOPE

#define SDL2_IMAGEFILTER_SCOPE extern

Definition at line 50 of file SDL2_imageFilter.h.

Function Documentation

◆ SDL_imageFilterAbsDiff()

SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterAbsDiff	(	unsigned char *	Src1,
		unsigned char *	Src2,
		unsigned char *	Dest,
		unsigned int	length
	)

Filter using AbsDiff: D = | S1 - S2 |.

Parameters

Src1	Pointer to the start of the first source byte array (S1).
Src2	Pointer to the start of the second source byte array (S2).
Dest	Pointer to the start of the destination byte array (D).
length	The number of bytes in the source arrays.

Returns: Returns 0 for success or -1 for error.

Definition at line 542 of file SDL2_imageFilter.c.

◆ SDL_imageFilterAdd()

SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterAdd	(	unsigned char *	Src1,
		unsigned char *	Src2,
		unsigned char *	Dest,
		unsigned int	length
	)

Filter using Add: D = saturation255(S1 + S2)

Parameters

Src1	Pointer to the start of the first source byte array (S1).
Src2	Pointer to the start of the second source byte array (S2).
Dest	Pointer to the start of the destination byte array (D).
length	The number of bytes in the source arrays.

Returns: Returns 0 for success or -1 for error.

Definition at line 173 of file SDL2_imageFilter.c.

◆ SDL_imageFilterAddByte()

SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterAddByte	(	unsigned char *	Src1,
		unsigned char *	Dest,
		unsigned int	length,
		unsigned char	C
	)

Filter using AddByte: D = saturation255(S + C)

Parameters

Src1	Pointer to the start of the source byte array (S).
Dest	Pointer to the start of the destination byte array (D).
length	The number of bytes in the source array.
C	Constant value to add (C).

Returns: Returns 0 for success or -1 for error.

Definition at line 1791 of file SDL2_imageFilter.c.

◆ SDL_imageFilterAddByteToHalf()

SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterAddByteToHalf	(	unsigned char *	Src1,
		unsigned char *	Dest,
		unsigned int	length,
		unsigned char	C
	)

Filter using AddByteToHalf: D = saturation255(S/2 + C)

Parameters

Src1	Pointer to the start of the source byte array (S).
Dest	Pointer to the start of the destination byte array (D).
length	The number of bytes in the source array.
C	Constant to add (C).

Returns: Returns 0 for success or -1 for error.

Definition at line 2068 of file SDL2_imageFilter.c.

◆ SDL_imageFilterAddUint()

SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterAddUint	(	unsigned char *	Src1,
		unsigned char *	Dest,
		unsigned int	length,
		unsigned int	C
	)

Filter using AddUint: D = saturation255((S[i] + Cs[i % 4]), Cs=Swap32((uint)C)

Parameters

Src1	Pointer to the start of the source byte array (S).
Dest	Pointer to the start of the destination byte array (D).
length	The number of bytes in the source array.
C	Constant to add (C).

Returns: Returns 0 for success or -1 for error.

Definition at line 1919 of file SDL2_imageFilter.c.

◆ SDL_imageFilterBinarizeUsingThreshold()

SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterBinarizeUsingThreshold	(	unsigned char *	Src1,
		unsigned char *	Dest,
		unsigned int	length,
		unsigned char	T
	)

Filter using BinarizeUsingThreshold: D = (S >= T) ? 255:0.

Parameters

Src1	Pointer to the start of the source byte array (S).
Dest	Pointer to the start of the destination byte array (D).
length	The number of bytes in the source array.
T	The threshold boundary (inclusive).

Returns: Returns 0 for success or -1 for error.

Definition at line 3534 of file SDL2_imageFilter.c.

◆ SDL_imageFilterBitAnd()

SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterBitAnd	(	unsigned char *	Src1,
		unsigned char *	Src2,
		unsigned char *	Dest,
		unsigned int	length
	)

Filter using BitAnd: D = S1 & S2.

Parameters

Src1	Pointer to the start of the first source byte array (S1).
Src2	Pointer to the start of the second source byte array (S2).
Dest	Pointer to the start of the destination byte array (D).
length	The number of bytes in the source arrays.

Returns: Returns 0 for success or -1 for error.

Definition at line 1278 of file SDL2_imageFilter.c.

◆ SDL_imageFilterBitNegation()

SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterBitNegation	(	unsigned char *	Src1,
		unsigned char *	Dest,
		unsigned int	length
	)

Filter using BitNegation: D = !S.

Parameters

Src1	Pointer to the start of the source byte array (S).
Dest	Pointer to the start of the destination byte array (D).
length	The number of bytes in the source array.

Returns: Returns 0 for success or -1 for error.

Definition at line 1671 of file SDL2_imageFilter.c.

◆ SDL_imageFilterBitOr()

SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterBitOr	(	unsigned char *	Src1,
		unsigned char *	Src2,
		unsigned char *	Dest,
		unsigned int	length
	)

Filter using BitOr: D = S1 | S2.

Parameters

Src1	Pointer to the start of the first source byte array (S1).
Src2	Pointer to the start of the second source byte array (S2).
Dest	Pointer to the start of the destination byte array (D).
length	The number of bytes in the source arrays.

Returns: Returns 0 for success or -1 for error.

Definition at line 1392 of file SDL2_imageFilter.c.

◆ SDL_imageFilterClipToRange()

SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterClipToRange	(	unsigned char *	Src1,
		unsigned char *	Dest,
		unsigned int	length,
		unsigned char	Tmin,
		unsigned char	Tmax
	)

Filter using ClipToRange: D = (S >= Tmin) & (S <= Tmax) S:Tmin | Tmax.

Parameters

Src1	Pointer to the start of the source byte array (S).
Dest	Pointer to the start of the destination byte array (D).
length	The number of bytes in the source array.
Tmin	Lower (inclusive) boundary of the clipping range.
Tmax	Upper (inclusive) boundary of the clipping range.

Returns: Returns 0 for success or -1 for error.

Definition at line 3691 of file SDL2_imageFilter.c.

◆ SDL_imageFilterDiv()

SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterDiv	(	unsigned char *	Src1,
		unsigned char *	Src2,
		unsigned char *	Dest,
		unsigned int	length
	)

Filter using Div: D = S1 / S2.

Parameters

Src1	Pointer to the start of the first source byte array (S1).
Src2	Pointer to the start of the second source byte array (S2).
Dest	Pointer to the start of the destination byte array (D).
length	The number of bytes in the source arrays.

Returns: Returns 0 for success or -1 for error.

Definition at line 1549 of file SDL2_imageFilter.c.

◆ SDL_imageFilterMean()

SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterMean	(	unsigned char *	Src1,
		unsigned char *	Src2,
		unsigned char *	Dest,
		unsigned int	length
	)

Filter using Mean: D = S1/2 + S2/2.

Parameters

Src1	Pointer to the start of the first source byte array (S1).
Src2	Pointer to the start of the second source byte array (S2).
Dest	Pointer to the start of the destination byte array (D).
length	The number of bytes in the source arrays.

Returns: Returns 0 for success or -1 for error.

Definition at line 308 of file SDL2_imageFilter.c.

◆ SDL_imageFilterMMXdetect()

SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterMMXdetect ( void )

MMX detection routine (with override flag).

Returns: 1 of MMX was detected, 0 otherwise.

Definition at line 80 of file SDL2_imageFilter.c.

◆ SDL_imageFilterMMXoff()

SDL2_IMAGEFILTER_SCOPE void SDL_imageFilterMMXoff ( void )

Disable MMX check for filter functions and and force to use non-MMX C based code.

Definition at line 93 of file SDL2_imageFilter.c.

◆ SDL_imageFilterMMXon()

SDL2_IMAGEFILTER_SCOPE void SDL_imageFilterMMXon ( void )

Enable MMX check for filter functions and use MMX code if available.

Definition at line 101 of file SDL2_imageFilter.c.

◆ SDL_imageFilterMult()

SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterMult	(	unsigned char *	Src1,
		unsigned char *	Src2,
		unsigned char *	Dest,
		unsigned int	length
	)

Filter using Mult: D = saturation255(S1 * S2)

Parameters

Src1	Pointer to the start of the first source byte array (S1).
Src2	Pointer to the start of the second source byte array (S2).
Dest	Pointer to the start of the destination byte array (D).
length	The number of bytes in the source arrays.

Returns: Returns 0 for success or -1 for error.

Definition at line 729 of file SDL2_imageFilter.c.

◆ SDL_imageFilterMultByByte()

SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterMultByByte	(	unsigned char *	Src1,
		unsigned char *	Dest,
		unsigned int	length,
		unsigned char	C
	)

Filter using MultByByte: D = saturation255(S * C)

Parameters

Src1	Pointer to the start of the source byte array (S).
Dest	Pointer to the start of the destination byte array (D).
length	The number of bytes in the source arrays.
C	Constant to multiply with (C).

Returns: Returns 0 for success or -1 for error.

Definition at line 2790 of file SDL2_imageFilter.c.

◆ SDL_imageFilterMultDivby2()

SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterMultDivby2	(	unsigned char *	Src1,
		unsigned char *	Src2,
		unsigned char *	Dest,
		unsigned int	length
	)

Filter using MultDivby2: D = saturation255(S1/2 * S2)

Parameters

Src1	Pointer to the start of the first source byte array (S1).
Src2	Pointer to the start of the second source byte array (S2).
Dest	Pointer to the start of the destination byte array (D).
length	The number of bytes in the source arrays.

Returns: Returns 0 for success or -1 for error.

Definition at line 1000 of file SDL2_imageFilter.c.

◆ SDL_imageFilterMultDivby4()

SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterMultDivby4	(	unsigned char *	Src1,
		unsigned char *	Src2,
		unsigned char *	Dest,
		unsigned int	length
	)

Filter using MultDivby4: D = saturation255(S1/2 * S2/2)

Parameters

Src1	Pointer to the start of the first source byte array (S1).
Src2	Pointer to the start of the second source byte array (S2).
Dest	Pointer to the start of the destination byte array (D).
length	The number of bytes in the source arrays.

Returns: Returns 0 for success or -1 for error.

Definition at line 1141 of file SDL2_imageFilter.c.

◆ SDL_imageFilterMultNor()

SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterMultNor	(	unsigned char *	Src1,
		unsigned char *	Src2,
		unsigned char *	Dest,
		unsigned int	length
	)

Filter using MultNor: D = S1 * S2.

Parameters

Src1	Pointer to the start of the first source byte array (S1).
Src2	Pointer to the start of the second source byte array (S2).
Dest	Pointer to the start of the destination byte array (D).
length	The number of bytes in the source arrays.

Returns: Returns 0 for success or -1 for error.

Definition at line 862 of file SDL2_imageFilter.c.

◆ SDL_imageFilterNormalizeLinear()

SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterNormalizeLinear	(	unsigned char *	Src,
		unsigned char *	Dest,
		unsigned int	length,
		int	Cmin,
		int	Cmax,
		int	Nmin,
		int	Nmax
	)

Filter using NormalizeLinear: D = saturation255((Nmax - Nmin)/(Cmax - Cmin)*(S - Cmin) + Nmin)

Parameters

Src	Pointer to the start of the source byte array (S).
Dest	Pointer to the start of the destination byte array (D).
length	The number of bytes in the source array.
Cmin	Normalization constant.
Cmax	Normalization constant.
Nmin	Normalization constant.
Nmax	Normalization constant.

Returns: Returns 0 for success or -1 for error.

Definition at line 3909 of file SDL2_imageFilter.c.

◆ SDL_imageFilterShiftLeft()

SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterShiftLeft	(	unsigned char *	Src1,
		unsigned char *	Dest,
		unsigned int	length,
		unsigned char	N
	)

Filter ShiftLeft: D = saturation255(S << N)

Parameters

Src1	Pointer to the start of the source byte array (S1).
Dest	Pointer to the start of the destination byte array (D).
length	The number of bytes in the source array.
N	Number of bit-positions to shift (N). Valid range is 0 to 8.

Returns: Returns 0 for success or -1 for error.

Definition at line 3393 of file SDL2_imageFilter.c.

◆ SDL_imageFilterShiftLeftByte()

SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterShiftLeftByte	(	unsigned char *	Src1,
		unsigned char *	Dest,
		unsigned int	length,
		unsigned char	N
	)

Filter using ShiftLeftByte: D = (S << N)

Parameters

Src1	Pointer to the start of the source byte array (S).
Dest	Pointer to the start of the destination byte array (D).
length	The number of bytes in the source arrays.
N	Number of bit-positions to shift (N). Valid range is 0 to 8.

Returns: Returns 0 for success or -1 for error.

Definition at line 3093 of file SDL2_imageFilter.c.

◆ SDL_imageFilterShiftLeftUint()

SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterShiftLeftUint	(	unsigned char *	Src1,
		unsigned char *	Dest,
		unsigned int	length,
		unsigned char	N
	)

Filter using ShiftLeftUint: D = ((uint)S << N)

Parameters

Src1	Pointer to the start of the source byte array (S).
Dest	Pointer to the start of the destination byte array (D).
length	The number of bytes in the source array.
N	Number of bit-positions to shift (N). Valid range is 0 to 32.

Returns: Returns 0 for success or -1 for error.

Definition at line 3210 of file SDL2_imageFilter.c.

◆ SDL_imageFilterShiftRight()

SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterShiftRight	(	unsigned char *	Src1,
		unsigned char *	Dest,
		unsigned int	length,
		unsigned char	N
	)

Filter using ShiftRight: D = saturation0(S >> N)

Parameters

Src1	Pointer to the start of the source byte array (S).
Dest	Pointer to the start of the destination byte array (D).
length	The number of bytes in the source array.
N	Number of bit-positions to shift (N). Valid range is 0 to 8.

Returns: Returns 0 for success or -1 for error.

Definition at line 2476 of file SDL2_imageFilter.c.

◆ SDL_imageFilterShiftRightAndMultByByte()

SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterShiftRightAndMultByByte	(	unsigned char *	Src1,
		unsigned char *	Dest,
		unsigned int	length,
		unsigned char	N,
		unsigned char	C
	)

Filter using ShiftRightAndMultByByte: D = saturation255((S >> N) * C)

Parameters

Src1	Pointer to the start of the source byte array (S).
Dest	Pointer to the start of the destination byte array (D).
length	The number of bytes in the source array.
N	Number of bit-positions to shift (N). Valid range is 0 to 8.
C	Constant to multiply with (C).

Returns: Returns 0 for success or -1 for error.

Definition at line 2943 of file SDL2_imageFilter.c.

◆ SDL_imageFilterShiftRightUint()

SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterShiftRightUint	(	unsigned char *	Src1,
		unsigned char *	Dest,
		unsigned int	length,
		unsigned char	N
	)

Filter using ShiftRightUint: D = saturation0((uint)S[i] >> N)

Parameters

Src1	Pointer to the start of the source byte array (S1).
Dest	Pointer to the start of the destination byte array (D).
length	The number of bytes in the source array.
N	Number of bit-positions to shift (N). Valid range is 0 to 32.

Returns: Returns 0 for success or -1 for error.

Definition at line 2594 of file SDL2_imageFilter.c.

◆ SDL_imageFilterSub()

SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterSub	(	unsigned char *	Src1,
		unsigned char *	Src2,
		unsigned char *	Dest,
		unsigned int	length
	)

Filter using Sub: D = saturation0(S1 - S2)

Parameters

Src1	Pointer to the start of the first source byte array (S1).
Src2	Pointer to the start of the second source byte array (S2).
Dest	Pointer to the start of the destination byte array (D).
length	The number of bytes in the source arrays.

Returns: Returns 0 for success or -1 for error.

Definition at line 422 of file SDL2_imageFilter.c.

◆ SDL_imageFilterSubByte()

SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterSubByte	(	unsigned char *	Src1,
		unsigned char *	Dest,
		unsigned int	length,
		unsigned char	C
	)

Filter using SubByte: D = saturation0(S - C)

Parameters

Src1	Pointer to the start of the source byte array (S).
Dest	Pointer to the start of the destination byte array (D).
length	The number of bytes in the source arrays.
C	Constant to subtract (C).

Returns: Returns 0 for success or -1 for error.

Definition at line 2196 of file SDL2_imageFilter.c.

◆ SDL_imageFilterSubUint()

SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterSubUint	(	unsigned char *	Src1,
		unsigned char *	Dest,
		unsigned int	length,
		unsigned int	C
	)

Filter using SubUint: D = saturation0(S[i] - Cs[i % 4]), Cs=Swap32((uint)C)

Parameters

Src1	Pointer to the start of the source byte array (S1).
Dest	Pointer to the start of the destination byte array (D).
length	The number of bytes in the source array.
C	Constant to subtract (C).

Returns: Returns 0 for success or -1 for error.

Definition at line 2325 of file SDL2_imageFilter.c.

Macros

Functions

Macro Definition Documentation

◆ SDL2_IMAGEFILTER_SCOPE

Function Documentation

◆ SDL_imageFilterAbsDiff()

◆ SDL_imageFilterAdd()

◆ SDL_imageFilterAddByte()

◆ SDL_imageFilterAddByteToHalf()

◆ SDL_imageFilterAddUint()

◆ SDL_imageFilterBinarizeUsingThreshold()

◆ SDL_imageFilterBitAnd()

◆ SDL_imageFilterBitNegation()

◆ SDL_imageFilterBitOr()

◆ SDL_imageFilterClipToRange()

◆ SDL_imageFilterDiv()

◆ SDL_imageFilterMean()

◆ SDL_imageFilterMMXdetect()

◆ SDL_imageFilterMMXoff()

◆ SDL_imageFilterMMXon()

◆ SDL_imageFilterMult()

◆ SDL_imageFilterMultByByte()

◆ SDL_imageFilterMultDivby2()

◆ SDL_imageFilterMultDivby4()

◆ SDL_imageFilterMultNor()

◆ SDL_imageFilterNormalizeLinear()

◆ SDL_imageFilterShiftLeft()

◆ SDL_imageFilterShiftLeftByte()

◆ SDL_imageFilterShiftLeftUint()

◆ SDL_imageFilterShiftRight()

◆ SDL_imageFilterShiftRightAndMultByByte()

◆ SDL_imageFilterShiftRightUint()

◆ SDL_imageFilterSub()

◆ SDL_imageFilterSubByte()

◆ SDL_imageFilterSubUint()