forked from tTh/FloatImg
adding HSV->RGB functions, expect garbage
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parent
44165c0a03
commit
8b4603fa21
50
funcs/hsv.c
50
funcs/hsv.c
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@ -27,7 +27,11 @@ return (fabsf(a-b)<0.00000000000001); // UGLY HACK ???
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}
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/* --------------------------------------------------------------------- */
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/*
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* WARNING : ALL THIS CODE IS SHIT
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* WARNING : ALL THIS CODE IS STRANGE
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*
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www.tutorialspoint.com/c-program-to-change-rgb-color-model-to-hsv-color-model
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*/
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int fimg_rgb2hsv(float rgb[3], float hsv[3], float scale)
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{
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@ -62,6 +66,50 @@ fprintf(stderr, "cmin/cmax %f %f\n", cmin, cmax);
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return 0;
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}
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/* --------------------------------------------------------------------- */
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int fimg_hsv2rgb(float hsv[3], float rgb[3], float scale)
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{
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float hh, ff, p, q, t;
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long i;
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if(hsv[1] <= 0.0) { // < is bogus, just shuts up warnings
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rgb[0] = rgb[1] = rgb[2] = hsv[2];
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return 0;
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}
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hh = hsv[0];
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if(hh >= 360.0) hh = 0.0;
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hh /= 60.0;
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i = (long)hh;
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ff = hh - i;
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p = hsv[2] * (1.0 - hsv[1]);
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q = hsv[2] * (1.0 - (hsv[1] * ff));
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t = hsv[2] * (1.0 - (hsv[1] * (1.0 - ff)));
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switch(i) {
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case 0:
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rgb[0] = hsv[2]; rgb[1] = t; rgb[2] = p;
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break;
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case 1:
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rgb[0] = q; rgb[1] = hsv[2]; rgb[2] = p;
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break;
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case 2:
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rgb[0] = p; rgb[1] = hsv[2]; rgb[2] = t;
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break;
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case 3:
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rgb[0] = p; rgb[1] = q; rgb[2] = hsv[2];
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break;
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case 4:
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rgb[0] = t; rgb[1] = p; rgb[2] = hsv[2];
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break;
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case 5:
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default:
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rgb[0] = hsv[2]; rgb[1] = p; rgb[2] = q;
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break;
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}
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return 0;
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}
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/* --------------------------------------------------------------------- */
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int fimg_essai_hsv(char *fname)
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{
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