mirror of
https://github.com/isometimes/rpi4-osdev
synced 2024-11-25 11:40:40 +00:00
86 lines
1.9 KiB
C
86 lines
1.9 KiB
C
#include "include/wgt.h"
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#include "include/mem.h"
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// ######## REQUIRED FUNCTIONS ########
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unsigned long state0 = 1000;
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unsigned long state1 = 2000;
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unsigned long rand(void)
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{
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unsigned long s1 = state0;
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unsigned long s0 = state1;
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state0 = s0;
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s1 ^= s1 << 23;
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s1 ^= s1 >> 17;
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s1 ^= s0;
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s1 ^= s0 >> 26;
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state1 = s1;
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return state0 + state1;
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}
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// ######## STUB FUNCTIONS ########
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unsigned int kb = 0;
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unsigned int kbhit(void) {
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kb++;
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return kb / 500;
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}
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void getch(void) {
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wait_msec(0x500000);
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kb = 0;
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}
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// ######## WGT EXAMPLES ########
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#define NUM_IN 5 /* number of random points */
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#define NUM_OUT 30 /* number of points of bezier curve */
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/* Fewer points will make more chunky line */
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void wgt33()
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{
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tpolypoint inpoint[NUM_IN]; /* Array with the normal curve points */
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tpolypoint outpoint[NUM_OUT]; /* Array with smooth curve points */
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block other; /* Pointer to our second screen */
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int i; /* Loop counter */
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set_clock_rate(get_max_clock());
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mem_init();
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vga256 (); /* Initialize graphics mode */
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other = wnewblock (0, 0, 319, 199); /* Allocate second screen */
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wsetcolor (vgapal[15]); /* Draw with white */
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do {
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wsetscreen (other); /* We'll draw on the hidden screen */
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wcls (vgapal[0]); /* Clear it with black */
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for (i = 0; i < NUM_IN; i++) /* Randomize the BEZIER control pts */
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{
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inpoint[i].x = rand() % 320;
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inpoint[i].y = rand() % 200;
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}
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wbezier (inpoint, NUM_IN, outpoint, NUM_OUT); /* Generate line */
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whollowpoly (outpoint, NUM_OUT, 0, 0, OPEN_POLY);
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/* draw the smooth curve */
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wnormscreen (); /* Reset drawing to visual screen */
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wputblock (0, 0, other, 0); /* Show the screen */
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getch();
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} while (1);
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wfreeblock (other); /* Free our screen buffer */
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}
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void main()
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{
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wgt33();
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while (1);
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}
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