51 lines
1.6 KiB
C
51 lines
1.6 KiB
C
/*
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* This file contains the source of a program used to demonstrate BTUI's 24-bit
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* color support by printing a rapidfire rainbow.
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*/
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#include <stdio.h>
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#include <math.h>
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#include "btui.h"
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int main(void)
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{
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btui_t *bt = btui_enable();
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if (!bt) return 1;
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int done = 0;
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double t = 0;
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double a = 1.13, b = 1.23, c = 1.37;
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double dt = 0.1;
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char buf[1<<20];
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setvbuf(bt->out, buf, _IOFBF, sizeof(buf));
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btui_puts(bt, T_OFF(T_WRAP));
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const char *title = " 24 BIT COLOR SUPPORT! ";
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while (!done) {
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int y = bt->height-1;
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btui_move_cursor(bt, 0, y);
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for (int x = 0; x < bt->width; x++) {
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int r = (int)(255.0 * (0.5 + 0.5*sin(t*a + (double)(x) / 50.0)));
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int g = (int)(255.0 * (0.5 + 0.5*sin(0.8 + t*b + (double)(x) / 50.0)));
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int b = (int)(255.0 * (0.5 + 0.5*sin(1.3 + t*c + (double)(x) / 50.0)));
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btui_set_bg(bt,
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(r < 0 ? 0 : (r > 255 ? 255 : r)),
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(g < 0 ? 0 : (g > 255 ? 255 : g)),
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(b < 0 ? 0 : (b > 255 ? 255 : b)));
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btui_puts(bt, " ");
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}
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btui_puts(bt, "\n");
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btui_move_cursor(bt, (bt->width - (int)strlen(title)) / 2, 0);
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btui_set_attributes(bt, BTUI_NORMAL | BTUI_BOLD);
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btui_puts(bt, title);
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btui_flush(bt);
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usleep(10000);
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t += dt;
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int mouse_x = -1, mouse_y = -1;
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int key = btui_getkey(bt, 0, &mouse_x, &mouse_y);
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switch (key) {
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case 'q': case KEY_CTRL_C: done = 1; break;
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}
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}
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btui_disable(bt);
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return 0;
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}
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