103 lines
2.1 KiB
C
103 lines
2.1 KiB
C
/*
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* P I X E L I Z E
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include "../floatimg.h"
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extern int verbosity;
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/* -------------------------------------------------------------- */
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/* nouveau 10 octobre 2021 dans la roulotte de Terreblanque */
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#define LARGEUR 16
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int fimg_pixelize_h_0(FloatImg *psrc, FloatImg *pdst, int largeur)
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{
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int line, col, loop, idx;
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float cr, cg, cb; /* cumuls */
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#if DEBUG_LEVEL
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fprintf(stderr, ">>> %s ( %p %p %d )\n", __func__, psrc, pdst, largeur);
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#endif
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if (fimg_images_not_compatible(psrc, pdst)) {
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fprintf(stderr, "%s: err compatibility\n", __func__);
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return -8;
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}
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switch(largeur) {
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case 8: case 16: case 32:
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break;
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default:
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fprintf(stderr, "pixeliz bad width %d\n", largeur);
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return -77;
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}
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for (line=0; line<psrc->height; line++) {
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for (col=0; col<psrc->width; col+=largeur) {
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cr = cg = cb = 0.0;
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idx = line * psrc->width + col;
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for (loop=0; loop<largeur; loop++) {
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cr += psrc->R[idx+loop];
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cg += psrc->G[idx+loop];
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cb += psrc->B[idx+loop];
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}
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for (loop=0; loop<largeur; loop++) {
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pdst->R[idx+loop] = cr / (float)largeur;
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pdst->G[idx+loop] = cg / (float)largeur;
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pdst->B[idx+loop] = cb / (float)largeur;
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}
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}
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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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* un essai dans la roulotte :)
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* 11 oct 2021 : premier jet, essai concluant, mais nécessite
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* du travail sur les rand() pour être plus 'noisy'
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*
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*/
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int fimg_pixelize_h_rnd(FloatImg *psrc, FloatImg *pdst, int largeur)
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{
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static int count = 0;
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static int flag = 0;
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int foo;
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if (0==count) {
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if (flag) {
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count = irand2(5, 10);
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flag = ! flag;
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}
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else {
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count = irand2(20, 40);
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flag = ! flag;
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}
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if (verbosity) {
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fprintf(stderr, "%s c=%d f=%c\n", __func__,
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count, flag?'T':'F');
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}
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}
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if (verbosity) {
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fprintf(stderr, "%s: count=%d flag=%d\n", __func__, count, flag);
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}
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foo = fimg_pixelize_h_0(psrc, pdst, flag ? 8 : 32);
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if (foo) {
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fprintf(stderr, "PANIC in %s\n", __func__);
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abort();
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}
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count--; /* nice trick bro */
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return 0;
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}
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/* -------------------------------------------------------------- */
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