FloatImg/funcs/sfx3.c

100 lines
2.1 KiB
C

/*
* FLOATIMG - a kluge from tTh
* ---------------------------
*
* some strange effects on floating pictures, made in
* the batcave of "Le Bib", in Montpellier.
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdint.h>
#include <sys/time.h>
#include "../floatimg.h"
extern int verbosity;
/* -------------------------------------------------------------- */
/* new Sun 29 Jan 2023 10:01:39 PM CET
*/
int fimg_make_rndfluffy_lines(FloatImg *src, FloatImg *dst, int rndt)
{
int x, y, ol;
float accu;
#if DEBUG_LEVEL
fprintf(stderr, ">>> %s ( '%p' '%p' %d )\n", __func__,
src, dst, rndt);
#endif
if (fimg_images_not_compatible(src, dst)) {
/* be hard for the lamers */
fprintf(stderr, "compatibility OUPS in %s\n", __func__);
abort();
}
for (y=0; y<src->height; y++) {
ol = y * src->width;
if (rndt < (rand() % 100)) {
accu = 0.0;
for (x=0; x<src->width; x++) accu += src->R[ol + x];
accu /= (float)src->width;
for (x=0; x<src->width; x++) dst->R[ol + x] = accu;
}
else {
for (x=0; x<src->width; x++) {
dst->R[ol+x] = src->R[ol+x];
dst->G[ol+x] = src->G[ol+x];
dst->B[ol+x] = src->B[ol+x];
}
}
}
return 0;
}
/* -------------------------------------------------------------- */
int fimg_crump_hard(FloatImg *src, FloatImg *dst, float kval, int notused)
{
float halfval;
float rgb[3];
int x, y, foo;
#if DEBUG_LEVEL
fprintf(stderr, ">>> %s ( %p %p %f 0x%04x )\n", __func__,
src, dst, kval, notused);
#endif
if (notused) {
fprintf(stderr, "%s: notused was %d, must be 0\n",
__func__, notused);
}
halfval = fimg_get_maxvalue(src) / 2.0;
if (verbosity > 1) {
fprintf(stderr, "%s: kval=%f & halfval=%f\n", __func__,
kval, halfval);
}
for (y=0; y<src->height; y++) {
for (x=0; x<src->width; x++) {
foo = fimg_get_rgb(src, x, y, rgb);
if (foo) return foo;
if (rgb[0] > halfval) rgb[0] /= 2.0;
if (rgb[1] > halfval) rgb[1] /= 2.0;
if (rgb[2] > halfval) rgb[2] /= 2.0;
foo = fimg_put_rgb(dst, x, y, rgb);
if (foo) return foo;
}
}
return 0;
}
/* -------------------------------------------------------------- */