greymap.h File Reference

#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>

Go to the source code of this file.

Classes
struct	greymap_s

Macros
#define	gm_index(gm, x, y)   (&(gm)->map[(x)+(y)*(ptrdiff_t)(gm)->w])
#define	gm_safe(gm, x, y)   ((int)(x)>=0 && (int)(x)<(gm)->w && (int)(y)>=0 && (int)(y)<(gm)->h)
#define	gm_bound(x, m)   ((x)<0 ? 0 : (x)>=(m) ? (m)-1 : (x))
#define	GM_UGET(gm, x, y)   (*gm_index(gm, x, y))
#define	GM_UINC(gm, x, y, b)   (*gm_index(gm, x, y) += (short int)(b))
#define	GM_UINV(gm, x, y)   (*gm_index(gm, x, y) = 255 - *gm_index(gm, x, y))
#define	GM_UPUT(gm, x, y, b)   (*gm_index(gm, x, y) = (short int)(b))
#define	GM_GET(gm, x, y)   (gm_safe(gm, x, y) ? GM_UGET(gm, x, y) : 0)
#define	GM_INC(gm, x, y, b)   (gm_safe(gm, x, y) ? GM_UINC(gm, x, y, b) : 0)
#define	GM_INV(gm, x, y)   (gm_safe(gm, x, y) ? GM_UINV(gm, x, y) : 0)
#define	GM_PUT(gm, x, y, b)   (gm_safe(gm, x, y) ? GM_UPUT(gm, x, y, b) : 0)
#define	GM_BGET(gm, x, y)   GM_UGET(gm, gm_bound(x, gm->w), gm_bound(y, gm->h))
#define	GM_MODE_NONZERO   1
#define	GM_MODE_ODD   2
#define	GM_MODE_POSITIVE   3
#define	GM_MODE_NEGATIVE   4

Typedefs
typedef struct greymap_s	greymap_t

Functions
greymap_t *	gm_new (int w, int h)
greymap_t *	gm_dup (greymap_t *gm)
void	gm_free (greymap_t *gm)
void	gm_clear (greymap_t *gm, int b)
int	gm_read (FILE *f, greymap_t **gmp)
int	gm_writepgm (FILE *f, greymap_t *gm, char *comment, int raw, int mode, double gamma)
int	gm_print (FILE *f, greymap_t *gm)

Variables
char *	gm_read_error

Macro Definition Documentation

GM_BGET

#define GM_BGET	(		gm,
			x,
			y
	)		GM_UGET(gm, gm_bound(x, gm->w), gm_bound(y, gm->h))

Definition at line 38 of file greymap.h.

gm_bound

#define gm_bound	(		x,
			m
	)		((x)<0 ? 0 : (x)>=(m) ? (m)-1 : (x))

Definition at line 29 of file greymap.h.

GM_GET

#define GM_GET	(		gm,
			x,
			y
	)		(gm_safe(gm, x, y) ? GM_UGET(gm, x, y) : 0)

Definition at line 34 of file greymap.h.

GM_INC

#define GM_INC	(		gm,
			x,
			y,
			b
	)		(gm_safe(gm, x, y) ? GM_UINC(gm, x, y, b) : 0)

Definition at line 35 of file greymap.h.

gm_index

#define gm_index	(		gm,
			x,
			y
	)		(&(gm)->map[(x)+(y)*(ptrdiff_t)(gm)->w])

Definition at line 27 of file greymap.h.

GM_INV

#define GM_INV	(		gm,
			x,
			y
	)		(gm_safe(gm, x, y) ? GM_UINV(gm, x, y) : 0)

Definition at line 36 of file greymap.h.

GM_MODE_NEGATIVE

#define GM_MODE_NEGATIVE   4

Definition at line 47 of file greymap.h.

GM_MODE_NONZERO

#define GM_MODE_NONZERO   1

Definition at line 44 of file greymap.h.

GM_MODE_ODD

#define GM_MODE_ODD   2

Definition at line 45 of file greymap.h.

GM_MODE_POSITIVE

#define GM_MODE_POSITIVE   3

Definition at line 46 of file greymap.h.

GM_PUT

#define GM_PUT	(		gm,
			x,
			y,
			b
	)		(gm_safe(gm, x, y) ? GM_UPUT(gm, x, y, b) : 0)

Definition at line 37 of file greymap.h.

gm_safe

#define gm_safe	(		gm,
			x,
			y
	)		((int)(x)>=0 && (int)(x)<(gm)->w && (int)(y)>=0 && (int)(y)<(gm)->h)

Definition at line 28 of file greymap.h.

GM_UGET

#define GM_UGET	(		gm,
			x,
			y
	)		(*gm_index(gm, x, y))

Definition at line 30 of file greymap.h.

GM_UINC

#define GM_UINC	(		gm,
			x,
			y,
			b
	)		(*gm_index(gm, x, y) += (short int)(b))

Definition at line 31 of file greymap.h.

GM_UINV

#define GM_UINV	(		gm,
			x,
			y
	)		(*gm_index(gm, x, y) = 255 - *gm_index(gm, x, y))

Definition at line 32 of file greymap.h.

GM_UPUT

#define GM_UPUT	(		gm,
			x,
			y,
			b
	)		(*gm_index(gm, x, y) = (short int)(b))

Definition at line 33 of file greymap.h.

Typedef Documentation

greymap_t

typedef struct greymap_s greymap_t

Definition at line 22 of file greymap.h.

Function Documentation

gm_clear()

void gm_clear	(	greymap_t *	gm,
		int	b
	)

gm_dup()

greymap_t* gm_dup

(

greymap_t *

gm

)

gm_free()

void gm_free

(

greymap_t *

gm

)

gm_new()

greymap_t* gm_new	(	int	w,
		int	h
	)

gm_print()

int gm_print	(	FILE *	f,
		greymap_t *	gm
	)

gm_read()

int gm_read	(	FILE *	f,
		greymap_t **	gmp
	)

gm_writepgm()

int gm_writepgm	(	FILE *	f,
		greymap_t *	gm,
		char *	comment,
		int	raw,
		int	mode,
		double	gamma
	)

Variable Documentation

gm_read_error

char* gm_read_error