324 lines
7.3 KiB
C
324 lines
7.3 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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#include "sfx.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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/* nouveau du 27 decembre 2020, un soir de grand froid... */
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int octotree_classif(FloatImg *pimg, int notused)
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{
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int foo;
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float mm[6], means[4];
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fprintf(stderr, ">>> %s ( %p %d )\n", __func__, pimg, notused);
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foo = fimg_meanvalues(pimg, means);
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if (foo) {
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fprintf(stderr, "oups %d in meanvalues\n", foo);
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return foo;
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}
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fprintf(stderr, "means: %11f %11f %11f\n", means[0], means[1], means[2]);
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foo = fimg_get_minmax_rgb(pimg, mm);
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if (foo) {
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fprintf(stderr, "oups %d in get minmax\n", foo);
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return foo;
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}
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fimg_print_minmax(mm, __func__);
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/*
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* compute the height center points */
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return -1;
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}
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/* -------------------------------------------------------------- */
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/* nouveau du 19 decembre 2020, pour le grand ecran de da Scritch */
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int upside_down(FloatImg *pimg)
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{
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float *rowpix;
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float *Ps, *Pd;
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int Os, Od; /* offset of lines */
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int wsz;
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int ya, y2;
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if (verbosity>1) fprintf(stderr, "%s: image width is %d\n",
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__func__, pimg->width);
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rowpix = calloc(pimg->width, sizeof(float));
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if (NULL==rowpix) {
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fprintf(stderr, "%s : memory full\n", __func__);
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exit(1);
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}
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wsz = pimg->width * sizeof(float);
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if (verbosity>1) fprintf(stderr, "%s: wsx = %d\n", __func__, wsz);
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for (ya=0; ya<pimg->height/2; ya++) {
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y2 = pimg->height - (ya+1);
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Os = (pimg->width * ya);
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Od = (pimg->width * y2);
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/* let's go, crash coredumping... */
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Ps = pimg->R + Os;
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Pd = pimg->R + Od;
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memcpy(rowpix, Ps, wsz);
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memcpy(Ps, Pd, wsz);
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memcpy(Pd, rowpix, wsz);
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Ps = pimg->G + Os;
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Pd = pimg->G + Od;
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memcpy(rowpix, Ps, wsz);
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memcpy(Ps, Pd, wsz);
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memcpy(Pd, rowpix, wsz);
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Ps = pimg->B + Os;
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Pd = pimg->B + Od;
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memcpy(rowpix, Ps, wsz);
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memcpy(Ps, Pd, wsz);
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memcpy(Pd, rowpix, wsz);
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}
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free(rowpix);
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return 0;
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}
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/* -------------------------------------------------------------- */
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/* nouveau du 9 decembre 2020, en ecoutant le Fermion raconter du
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superbe portnawak */
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int bouger_les_pixels(FloatImg *pimg, int intensite)
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{
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int x, y, nx, ny;
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float rgb[3];
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#if DEBUG_LEVEL
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fprintf(stderr, ">>> %s ( %p %d )\n", __func__, pimg, intensite);
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#endif
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if (intensite < 1) {
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fprintf(stderr, "%s: %d bad intensity\n", __func__, intensite);
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return -1;
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}
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for (x=0; x<pimg->width; x++) {
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for (y=0; y<pimg->height; y++) {
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nx = x+(rand()%intensite)-(intensite/2);
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ny = y+(rand()%intensite)-(intensite/2);
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if ( nx<0 || ny<0 || nx>=pimg->width
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|| ny>=pimg->height )
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continue;
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fimg_get_rgb(pimg, nx, ny, rgb);
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fimg_put_rgb(pimg, x, y, rgb);
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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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/* nouveau du 9 decembre 2020, en ecoutant les Cernettes */
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int mirror_split(FloatImg *pimg, int kaboo)
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{
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int line, x, xs, xd;
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#if DEBUG_LEVEL
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fprintf(stderr, ">>> %s ( %p %d )\n", __func__, pimg, kaboo);
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#endif
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for (line=0; line<pimg->height; line++) {
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for (x=0; x<pimg->width/2; x++) {
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xs = (pimg->width * line) + x;
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xd = (pimg->width * line) + (pimg->width -x);
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pimg->R[xd] = pimg->R[xs];
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pimg->G[xd] = pimg->G[xs];
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pimg->B[xd] = pimg->B[xs];
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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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/* nouveau du 20 novembre 2020, pour encoder une vidz du vernissage
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* du festival Sauvageonnes de Mixart-Myrys */
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int des_bords_sombres_a(FloatImg *pimg, int offset)
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{
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float coef;
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int xpos, xp2, lidx, y;
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#if DEBUG_LEVEL
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fprintf(stderr, ">>> %s ( %p %d )\n", __func__, pimg, offset);
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#endif
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if (offset<0 || offset>=pimg->width) {
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fprintf(stderr, "%s offset %d is bad\n", __func__, offset);
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return -66;
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}
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for (y=0; y<pimg->height; y++) {
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lidx = y * pimg->width; /* start of the
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'y' line */
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for (xpos=0; xpos<offset; xpos++) {
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coef = (float)xpos / (float)offset;
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pimg->R[xpos+lidx] *= coef;
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pimg->G[xpos+lidx] *= coef;
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pimg->B[xpos+lidx] *= coef;
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xp2 = pimg->width-xpos;
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pimg->R[xp2+lidx] *= coef;
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pimg->G[xp2+lidx] *= coef;
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pimg->B[xp2+lidx] *= coef;
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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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int trinarize(FloatImg *pimg, int notused)
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{
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float mm[6], mRa, mGa, mBa, mRb, mGb, mBb;
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float *fptr;
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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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mRa = (mm[1] - mm[0]) * 0.33333;
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mGa = (mm[3] - mm[2]) * 0.33333;
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mBa = (mm[5] - mm[4]) * 0.33333;
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mRb = (mm[1] - mm[0]) * 0.66666;
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mGb = (mm[3] - mm[2]) * 0.66666;
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mBb = (mm[5] - mm[4]) * 0.66666;
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size = pimg->width * pimg->height;
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for (foo=0; foo<size; foo++) {
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fptr = pimg->R;
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if (fptr[foo] < mRa || fptr[foo] > mRb)
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fptr[foo] = mm[0];
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else
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fptr[foo] = mm[1];
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fptr = pimg->G;
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if (fptr[foo] < mGa || fptr[foo] > mGb)
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fptr[foo] = mm[2];
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else
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fptr[foo] = mm[3];
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fptr = pimg->B;
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if (fptr[foo] < mBa || fptr[foo] > mBb)
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fptr[foo] = mm[4];
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else
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fptr[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 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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