107 lines
2.4 KiB
C
107 lines
2.4 KiB
C
/*
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testing some random funcs.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <math.h>
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#include "../floatimg.h"
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/* --------------------------------------------------------------------- */
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int fimg_test_pattern(FloatImg *fimg, int type, double dval)
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{
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int nio;
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int x, y, k;
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float fr, fg, fb, val;
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#if DEBUG_LEVEL
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fprintf(stderr, ">>> %s ( %p %d %g )\n", __func__, fimg, type, dval);
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#endif
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if (fimg->type != FIMG_TYPE_RGB) {
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fprintf(stderr, "%s need an rgb pic\n", __func__);
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return -6;
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}
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/* rampe de primaires dans le quart du haut */
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val = (float)dval;
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for (x=0; x<fimg->width; x++) {
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nio = x / (fimg->width / 8);
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switch(nio) {
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case 0: fr = 0.0, fg = 0.0, fb = 0.0; break;
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case 1: fr = val, fg = 0.0, fb = 0.0; break;
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case 2: fr = 0.0, fg = val, fb = 0.0; break;
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case 3: fr = val, fg = val, fb = 0.0; break;
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case 4: fr = 0.0, fg = 0.0, fb = val; break;
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case 5: fr = val, fg = 0.0, fb = val; break;
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case 6: fr = 0.0, fg = val, fb = val; break;
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case 7: fr = val, fg = val, fb = val; break;
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default:
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abort(); break;
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}
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for (y=0; y<fimg->height/4; y++)
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fimg_plot_rgb(fimg, x, y, fr, fg, fb);
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}
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k = fimg->height / 4;
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for (x=0; x<fimg->width; x++) {
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val = ((double)x / (double)fimg->width) * dval;
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for (y=0; y<20; y++) {
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fimg_plot_rgb(fimg, x, k+y, val, val, val);
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fimg_plot_rgb(fimg, x, k+y+20, dval-val, dval-val, dval-val);
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}
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// fprintf(stderr, " %6d %f\n", x, val);
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}
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return 0;
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}
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/* --------------------------------------------------------------------- */
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int fimg_draw_something(FloatImg *fimg)
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{
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int x, y;
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float fx, fy;
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#define K (3.14159*13.456)
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#define M 100.0
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for (x=0; x<fimg->width; x++) {
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fimg_plot_rgb(fimg, x, 0,
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(float)x,
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(float)x + 5.678,
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(float)x * 1.33333);
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}
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for (y=1; y<fimg->height; y++) {
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fy = (float)y / (float)fimg->height;
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for (x=0; x<fimg->width; x++) {
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fx = (float)x / (float)fimg->width;
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fimg_plot_rgb(fimg, x, y,
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M*(cos(fx*K)+1.2),
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M*(sin(fy*K)+1.4),
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M*(cos(fx*fy)+1.6));
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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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int fimg_multirandom(FloatImg *fimg)
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{
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int foo, x, y;
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#define RI ( (rand()/7) + (rand()/9) )
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#define RD ( (drand48()/7) + (drand48()/7) )
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for (foo=0; foo<100000000; foo++)
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{
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x = RI % fimg->width;
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y = RI % fimg->height;
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fimg_add_rgb(fimg, x, y, RD, RD, RD);
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}
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return 0;
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}
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/* --------------------------------------------------------------------- */
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