85 lines
2.0 KiB
C
85 lines
2.0 KiB
C
/* Internal header for random common utility functions. */
|
|
|
|
#ifndef GD_INTERN_H
|
|
#define GD_INTERN_H
|
|
|
|
#include <limits.h>
|
|
|
|
#ifndef MAXPATHLEN
|
|
# ifdef PATH_MAX
|
|
# define MAXPATHLEN PATH_MAX
|
|
# elif defined(MAX_PATH)
|
|
# define MAXPATHLEN MAX_PATH
|
|
# else
|
|
# if defined(__GNU__)
|
|
# define MAXPATHLEN 4096
|
|
# else
|
|
# define MAXPATHLEN 256 /* Should be safe for any weird systems that do not define it */
|
|
# endif
|
|
# endif
|
|
#endif
|
|
|
|
#ifdef HAVE_STDINT_H
|
|
# include <stdint.h>
|
|
#else
|
|
# if defined(HAVE_INTTYPES_H)
|
|
# include <inttypes.h>
|
|
# else
|
|
# include "msinttypes/inttypes.h"
|
|
# endif
|
|
#endif
|
|
|
|
#include "gd.h"
|
|
|
|
#define MIN(a,b) ((a)<(b)?(a):(b))
|
|
#define MIN3(a,b,c) ((a)<(b)?(MIN(a,c)):(MIN(b,c)))
|
|
#define MAX(a,b) ((a)<(b)?(b):(a))
|
|
#define MAX3(a,b,c) ((a)<(b)?(MAX(b,c)):(MAX(a,c)))
|
|
#define CLAMP(x, low, high) (((x) > (high)) ? (high) : (((x) < (low)) ? (low) : (x)))
|
|
|
|
typedef enum {
|
|
HORIZONTAL,
|
|
VERTICAL,
|
|
} gdAxis;
|
|
|
|
/* Convert a double to an unsigned char, rounding to the nearest
|
|
* integer and clamping the result between 0 and max. The absolute
|
|
* value of clr must be less than the maximum value of an unsigned
|
|
* short. */
|
|
static inline unsigned char
|
|
uchar_clamp(double clr, unsigned char max) {
|
|
unsigned short result;
|
|
|
|
//assert(fabs(clr) <= SHRT_MAX);
|
|
|
|
/* Casting a negative float to an unsigned short is undefined.
|
|
* However, casting a float to a signed truncates toward zero and
|
|
* casting a negative signed value to an unsigned of the same size
|
|
* results in a bit-identical value (assuming twos-complement
|
|
* arithmetic). This is what we want: all legal negative values
|
|
* for clr will be greater than 255. */
|
|
|
|
/* Convert and clamp. */
|
|
result = (unsigned short)(short)(clr + 0.5);
|
|
if (result > max) {
|
|
result = (clr < 0) ? 0 : max;
|
|
}/* if */
|
|
|
|
return result;
|
|
}/* uchar_clamp*/
|
|
|
|
|
|
/* Internal prototypes: */
|
|
|
|
/* gd_rotate.c */
|
|
gdImagePtr gdImageRotate90(gdImagePtr src, int ignoretransparent);
|
|
gdImagePtr gdImageRotate180(gdImagePtr src, int ignoretransparent);
|
|
gdImagePtr gdImageRotate270(gdImagePtr src, int ignoretransparent);
|
|
|
|
|
|
|
|
|
|
|
|
|
|
#endif
|