Bibliothèque de traitements d'images en virgule flottante.
http://la.buvette.org/photos/cumul/
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385 lines
8.9 KiB
385 lines
8.9 KiB
/*
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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 <math.h>
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#include "../floatimg.h"
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#include "fifo.h"
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#include "metriques.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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/*
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* please, add some parameters !
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*/
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int incrustation_vignette(FloatImg *src, FloatImg *dst, int k)
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{
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int x, y, x4, y4;
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float rgb[3];
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#if DEBUG_LEVEL
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fprintf(stderr, ">>> %s ( %p %p %d )\n", __func__, src, dst, k);
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#endif
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x4 = dst->width / 4, y4 = dst->height / 4;
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for (y=0; y<y4; y++) {
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for (x=0; x<x4; x++) {
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fimg_get_rgb(src, x*4, y*4, rgb);
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fimg_put_rgb(dst, x+39, y+39, rgb);
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}
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}
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return -1;
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}
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/* -------------------------------------------------------------- */
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/* nouveau du premier dimanche de 2020 'nextgen' */
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static int pixel_trinitron(FloatImg *pimg, int pos[4], float *fvals)
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{
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int x, y, pline, off;
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for (y=pos[1]; y<pos[1]+pos[3]; y++) {
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pline = y*pimg->width;
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for (x=pos[0]+2; x<pos[0]+pos[2]-2; x++) {
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off = pline + x;
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pimg->R[off] = fvals[0];
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pimg->G[off] = fvals[1];
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pimg->B[off] = fvals[2];
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}
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}
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return 0;
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}
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int trinitron(FloatImg *pimg, int notused)
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{
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int x, y, coo[4], foo;
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float vals[3];
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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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#define STP 16 /* stepd for x & y axex */
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coo[2] = coo[3] = STP;
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for (y=0; y<pimg->height; y+=STP) {
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coo[1] = y;
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for (x=0; x<pimg->width; x+=STP) {
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coo[0] = x;
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foo = stat_zone(pimg, coo, vals);
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if (foo) abort();
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/* next step : plot the datas */
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pixel_trinitron(pimg, coo, vals);
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}
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}
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#undef STP
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return 0;
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}
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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, float kdist, int notused)
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{
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int foo;
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float mm[6], delta[3];
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float r, g, b, kr, kg, kb, dp, trig;
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int idx, sz, n8, count;
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typedef struct {
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float x, y, z;
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} ptc_t;
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ptc_t ptc[8];
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#if DEBUG_LEVEL
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fprintf(stderr, ">>> %s ( %p %f %d )\n", __func__,
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pimg, kdist, notused);
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#endif
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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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if (verbosity>1) fimg_print_minmax(mm, " input pic ");
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/*
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* compute the 8 center points
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*/
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delta[0] = mm[1] - mm[0]; /* R */
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delta[1] = mm[3] - mm[2]; /* G */
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delta[2] = mm[5] - mm[4]; /* B */
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// fprintf(stderr, "delta: %11.3f %11.3f %11.3f\n",
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// delta[0], delta[1], delta[2]);
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for (idx=0; idx<8; idx++) {
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kr = 0.25 * ((idx & 0x4) ? 1 : 3);
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kg = 0.25 * ((idx & 0x2) ? 1 : 3);
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kb = 0.25 * ((idx & 0x1) ? 1 : 3);
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// fprintf(stderr, "%6d %.2f %.2f %.2f\n", idx, kr, kg, kb);
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ptc[idx].x = (delta[0] * kr) + mm[0];
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ptc[idx].y = (delta[1] * kg) + mm[2];
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ptc[idx].z = (delta[2] * kb) + mm[4];
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// fprintf(stderr, "%6d %.3f %.3f %.3f\n", idx,
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// ptc[idx].x, ptc[idx].y, ptc[idx].z);
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}
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sz = pimg->width * pimg->height;
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trig = kdist * ((mm[1] + mm[3] + mm[5])/6.0);
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// fprintf(stderr, "trig value %f\n", trig);
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count = 0;
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#define X(a,b) ( ((a)-(b)) * ((a)-(b)) )
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for (idx=0; idx<sz; idx++) {
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r = pimg->R[idx]; g = pimg->G[idx]; b = pimg->B[idx];
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for (n8=0; n8<8; n8++) {
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dp = sqrt(X(r,ptc[n8].x)+X(g,ptc[n8].y)+X(b,ptc[n8].z));
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if (dp < trig) {
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pimg->R[idx] = ptc[n8].x;
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pimg->G[idx] = ptc[n8].y;
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pimg->B[idx] = ptc[n8].z;
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count++;
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break;
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}
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else {
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pimg->R[idx]=pimg->G[idx]=pimg->B[idx]=0.0;
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}
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}
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}
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if (verbosity > 1) {
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fprintf(stderr, "%s: %d/%d pixels, ratio %f\n", __func__, count, sz,
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(float)count/(float)sz);
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}
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return 0;
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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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/* XXX optimize here ? */
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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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/* nouveau Mon 10 May 2021 08:46:02 PM CEST
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* chez Eric 1KA */
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int des_bords_sombres_b(FloatImg *pimg, int offset)
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{
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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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return -1;
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}
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/* -------------------------------------------------------------- */
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/*
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* int binarize(FloatImg *pimg, int notused) was now in
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* funcs/sfx2.c
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* same move for trinarize.
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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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