a new function : fimg_desaturate
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1b2355f046
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@ -2,7 +2,7 @@
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* floatimg.h
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*/
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#define FIMG_VERSION 87
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#define FIMG_VERSION 88
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/*
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* in memory descriptor
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@ -57,7 +57,6 @@ int fimg_print_version(int k);
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void fimg_printhead(FloatImg *h);
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int fimg_describe(FloatImg *head, char *txt);
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char *fimg_str_type(int type);
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int fimg_fileinfo(char *fname, int *datas);
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int fimg_plot_rgb (FloatImg *head, int x, int y, float r, float g, float b);
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int fimg_clear(FloatImg *fimg);
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int fimg_add_rgb(FloatImg *head, int x, int y, float r, float g, float b);
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@ -91,6 +90,7 @@ int fimg_cos_01(FloatImg *s, FloatImg *d, double maxval);
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int fimg_cos_010(FloatImg *s, FloatImg *d, double maxval);
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int fimg_mk_gray_from(FloatImg *src, FloatImg*dst, int k);
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int fimg_desaturate(FloatImg *src, FloatImg *dst, int k);
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/* module funcs/rampes.c */
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int fimg_hdeg_a(FloatImg *img, double dcoef);
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@ -52,6 +52,28 @@ for (foo=0; foo<nbb; foo++) {
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return 0;
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}
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/* --------------------------------------------------------------------- */
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int fimg_desaturate(FloatImg *src, FloatImg *dst, int k)
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{
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int foo, nbb;
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float fval;
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/* we must check the validity of our parameters */
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if (FIMG_TYPE_RGB != src->type || FIMG_TYPE_RGB != dst->type) {
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fprintf(stderr, "%s : bad image type\n", __func__, src->type, src);
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return -18;
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}
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/* entering the main processing loop */
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nbb = src->width * src->height;
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for (foo=0; foo<nbb; foo++) {
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dst->R[foo] = dst->G[foo] = dst->B[foo] =
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(src->R[foo] + src->G[foo] + src->B[foo]) / 3.0;
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}
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return -99;
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}
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/* --------------------------------------------------------------------- */
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