105 lines
2.1 KiB
C
105 lines
2.1 KiB
C
/*
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* qsort_rgb.c
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <math.h>
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#include "../floatimg.h"
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int verbosity;
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/* --------------------------------------------------------------------- */
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/* nouveau 7 octobre 2020, juste avant sonoptic de la pluie craignos */
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static int compare_a(const void *p1, const void *p2)
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{
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return ( *(float *)p1 < *(float *)p2 );
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}
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int fimg_qsort_rgb_a(FloatImg *psrc, FloatImg *pdst, int notused)
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{
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int foo, szimg;
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#if DEBUG_LEVEL
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fprintf(stderr, ">>> %s ( %p %p %d )\n", __func__, psrc, pdst, notused);
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#endif
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foo = fimg_copy_data(psrc, pdst);
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szimg = pdst->width * pdst->height;
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fprintf(stderr, "%s : %d pixels\n", __func__, szimg);
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qsort(pdst->R, szimg, sizeof(float), compare_a);
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qsort(pdst->G, szimg, sizeof(float), compare_a);
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qsort(pdst->B, szimg, sizeof(float), compare_a);
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return 0;
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}
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/* --------------------------------------------------------------------- */
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typedef struct {
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float sum;
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float r, g, b;
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} pix;
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static compare_b(const void *p1, const void *p2)
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{
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pix *s1, *s2;
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s1 = (pix *)p1;
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s2 = (pix *)p2;
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return ( s1->sum < s2->sum );
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}
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int fimg_qsort_rgb_b(FloatImg *psrc, FloatImg *pdst, int notused)
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{
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int x, y, szimg;
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pix *ppix, *ptr;
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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__, psrc, pdst, notused);
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#endif
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szimg = pdst->width * pdst->height;
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fprintf(stderr, "%s : %d pixels\n", __func__, szimg);
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ppix = calloc(szimg, sizeof(pix));
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ptr = ppix; /* mobile pointer */
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for (y=0; y<psrc->height; y++) {
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for (x=0; x<psrc->width; x++) {
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fimg_get_rgb(psrc, x, y, rgb);
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ptr->sum = rgb[0] + rgb[1] + rgb[2];
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ptr->r = rgb[0];
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ptr->g = rgb[1];
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ptr->b = rgb[2];
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ptr++; /* next pixel */
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}
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}
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qsort(ppix, szimg, sizeof(pix), compare_b);
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ptr = ppix; /* mobile pointer */
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for (y=0; y<psrc->height; y++) {
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for (x=0; x<psrc->width; x++) {
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rgb[0] = ptr->r;
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rgb[1] = ptr->g;
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rgb[2] = ptr->b;
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fimg_put_rgb(pdst, x, y, rgb);
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ptr++; /* next pixel */
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}
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}
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free(ppix);
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return 0;
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}
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/* --------------------------------------------------------------------- */
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