102 lines
2.1 KiB
C
102 lines
2.1 KiB
C
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/*
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* SPECIAL EFFECTS
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*
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* Du code bien cracra / tTh / Tetalab
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*/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <malloc.h>
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#include <floatimg.h>
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#include "fonctions.h"
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/* -------------------------------------------------------------- */
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/* global vars from main
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*/
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extern int verbosity;
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/* -------------------------------------------------------------- */
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int brotche_rand48(FloatImg *fimg, float ratio, float mval)
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{
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int nbpix, todo, foo;
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int x, y;
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float fval;
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nbpix = fimg->width * fimg->height;
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todo = (int)((float)nbpix * ratio);
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if (verbosity > 1)
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fprintf(stderr, "ratio %f nbpix %d todo %d\n", ratio, nbpix, todo);
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for (foo=0; foo<todo; foo++)
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{
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fval = (float)drand48() * mval;
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x = rand() % fimg->width;
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y = rand() % fimg->height;
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fimg_plot_rgb(fimg, x, y, fval, fval, fval);
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}
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return 0;
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}
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/* -------------------------------------------------------------- */
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int brotche_rand48_b(FloatImg *fimg, float ratio, float mval)
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{
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int nbpix, todo, foo;
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int x, y;
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float fval;
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nbpix = fimg->width * fimg->height;
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todo = (int)((float)nbpix * ratio);
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if (verbosity > 1) {
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fprintf(stderr, "ratio %f nbpix %d todo %d\n",
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ratio, nbpix, todo);
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}
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for (foo=0; foo<todo; foo++)
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{
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fval = (float)drand48() * mval;
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x = 1 + (rand() % (fimg->width-2));
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y = rand() % fimg->height;
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fimg_plot_rgb(fimg, x-1, y, fval, 0.0, 0.0);
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fimg_plot_rgb(fimg, x , y, 0.0, 0.0, fval);
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fimg_plot_rgb(fimg, x+1, y, 0.0, fval, 0.0);
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}
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return 0;
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}
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/* -------------------------------------------------------------- */
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/*
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* OMG ! a Color Graphic Adaptor emulator :)
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*/
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int kill_colors_a(FloatImg *fimg, float fval)
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{
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int nbpix, foo;
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if (FIMG_TYPE_RGB != fimg->type) {
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fprintf(stderr, "%s: bad src type %d on %p\n", __func__,
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fimg->type, fimg);
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return -8;
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}
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nbpix = fimg->width * fimg->height;
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for (foo=0; foo<nbpix; foo++) {
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if (fimg->R[foo] > fimg->G[foo])
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fimg->B[foo] = fimg->R[foo];
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else
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fimg->B[foo] = fimg->G[foo];
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}
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return 0;
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}
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/* -------------------------------------------------------------- */
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/* -------------------------------------------------------------- */
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