64 lines
1.3 KiB
C
64 lines
1.3 KiB
C
/*
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* FLOATIMG
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* rampes diverses, trucs etranges
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*/
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#include <stdio.h>
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#include "../floatimg.h"
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/* --------------------------------------------------------------------- */
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int fimg_hdeg_a(FloatImg *img, double dcoef)
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{
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int x, y;
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float value;
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#if DEBUG_LEVEL
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fprintf(stderr, ">>> %s ( %p %f )\n", __func__, img, dcoef);
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#endif
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if (FIMG_TYPE_RGB != img->type) {
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fprintf(stderr, "%s bad type\n", __func__);
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return -6;
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}
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for (x=0; x<img->width; x++)
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{
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value = (float)x / (float)img->width;
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value *= dcoef;
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for (y=0; y<img->height; y++) {
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fimg_plot_rgb(img, x, y, value, value, value);
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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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/*
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* To have the black at the bottom, use a negative dcoef
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*/
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int fimg_vdeg_a(FloatImg *img, double dcoef)
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{
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int x, y;
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float value;
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#if DEBUG_LEVEL
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fprintf(stderr, ">>> %s ( %p %f )\n", __func__, img, dcoef);
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#endif
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if (FIMG_TYPE_RGB != img->type) {
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fprintf(stderr, "%s bad type\n", __func__);
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return -6;
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}
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for (y=0; y<img->height; y++)
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{
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value = (float)y / (float)img->height;
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value *= dcoef;
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for (x=0; x<img->width; x++) {
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fimg_plot_rgb(img, x, y, value, value, value);
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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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