90 lines
1.8 KiB
C
90 lines
1.8 KiB
C
/*
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* FLOATIMG
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* effets spéciaux àlc sur les couleurs
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*/
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#include <stdio.h>
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#include <string.h>
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#include "../floatimg.h"
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/* --------------------------------------------------------------------- */
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/*
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* OMG ! a Color Graphic Adaptor emulator :)
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*/
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int fimg_killcolors_a(FloatImg *fimg, float fval)
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{
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int nbpix, foo;
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if (FIMG_TYPE_RGB != fimg->type) {
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fprintf(stderr, "%s: bad src type %d on %p\n", __func__,
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fimg->type, fimg);
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return -8;
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}
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nbpix = fimg->width * fimg->height;
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for (foo=0; foo<nbpix; foo++) {
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if (fimg->R[foo] > fimg->G[foo])
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fimg->B[foo] = fimg->R[foo];
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else
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fimg->B[foo] = fimg->G[foo];
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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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* parameter fval is not used, why ?
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*/
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int fimg_killcolors_b(FloatImg *fimg, float fval)
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{
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int nbpix, foo;
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if (FIMG_TYPE_RGB != fimg->type) {
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fprintf(stderr, "%s: bad src type %d on %p\n", __func__,
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fimg->type, fimg);
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return -8;
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}
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nbpix = fimg->width * fimg->height;
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for (foo=0; foo<nbpix; foo++) {
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if (fimg->R[foo] > fimg->B[foo])
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fimg->G[foo] = fimg->R[foo];
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else
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fimg->G[foo] = fimg->B[foo];
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}
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return 0;
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}
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/* --------------------------------------------------------------------- */
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int fimg_colors_mixer_a(FloatImg *fimg, float fval)
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{
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int nbpix, foo;
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float R, G, B;
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if (FIMG_TYPE_RGB != fimg->type) {
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fprintf(stderr, "%s: bad src type %d on %p\n", __func__,
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fimg->type, fimg);
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#if MUST_ABORT
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abort();
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#endif
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return -8;
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}
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nbpix = fimg->width * fimg->height;
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for (foo=0; foo<nbpix; foo++) {
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R = (fimg->G[foo] + fimg->B[foo]) / fval;
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G = (fimg->R[foo] + fimg->B[foo]) / fval;
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B = (fimg->R[foo] + fimg->G[foo]) / fval;
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fimg->R[foo] = R;
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fimg->G[foo] = G;
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fimg->B[foo] = B;
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}
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return 0;
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}
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/* --------------------------------------------------------------------- */
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