112 lines
2.5 KiB
C
112 lines
2.5 KiB
C
/*
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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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/* here are global vars exported by the main module
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*/
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extern int verbosity;
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/* -------------------------------------------------------------- */
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int trinarize(FloatImg *pimg, int notused)
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{
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fprintf(stderr, "the function '%s' is not implemented\n", __func__);
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exit(2);
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return -1;
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}
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/* -------------------------------------------------------------- */
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int binarize(FloatImg *pimg, int notused)
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{
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float mm[6], mR, mG, mB;
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int foo, size;
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#if DEBUG_LEVEL
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fprintf(stderr, ">>> %s ( %p %d )\n", __func__, pimg, notused);
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#endif
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foo = fimg_get_minmax_rgb(pimg, mm);
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mR = (mm[1] - mm[0]) / 2.0;
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mG = (mm[3] - mm[2]) / 2.0;
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mB = (mm[5] - mm[4]) / 2.0;
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if (verbosity > 1)
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fprintf(stderr, "%s: %f %f %f\n", __func__, mR, mG, mB);
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size = pimg->width * pimg->height;
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for (foo=0; foo<size; foo++) {
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if (pimg->R[foo] < mR) pimg->R[foo] = mm[0];
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else pimg->R[foo] = mm[1];
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if (pimg->G[foo] < mG) pimg->G[foo] = mm[2];
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else pimg->G[foo] = mm[3];
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if (pimg->B[foo] < mB) pimg->B[foo] = mm[4];
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else pimg->B[foo] = mm[5];
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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_a(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, "%s: ratio %f nbpix %d todo %d\n", __func__,
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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 = 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, "%s: ratio %f nbpix %d todo %d\n", __func__,
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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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