mirror of
https://github.com/isometimes/rpi4-osdev
synced 2024-11-24 19:20:40 +00:00
97 lines
2.4 KiB
C
97 lines
2.4 KiB
C
#include "include/wgt.h"
|
|
#include "include/mem.h"
|
|
|
|
// ######## REQUIRED FUNCTIONS ########
|
|
|
|
unsigned long state0 = 1000;
|
|
unsigned long state1 = 2000;
|
|
|
|
unsigned long rand(void)
|
|
{
|
|
unsigned long s1 = state0;
|
|
unsigned long s0 = state1;
|
|
|
|
state0 = s0;
|
|
s1 ^= s1 << 23;
|
|
s1 ^= s1 >> 17;
|
|
s1 ^= s0;
|
|
s1 ^= s0 >> 26;
|
|
state1 = s1;
|
|
|
|
return state0 + state1;
|
|
}
|
|
|
|
// ######## STUB FUNCTIONS ########
|
|
|
|
unsigned int kb = 0;
|
|
|
|
unsigned int kbhit(void) {
|
|
kb++;
|
|
return kb / 500;
|
|
}
|
|
|
|
void getch(void) {
|
|
wait_msec(0x500000);
|
|
kb = 0;
|
|
}
|
|
|
|
// ######## WGT EXAMPLES ########
|
|
|
|
void wgt29()
|
|
{
|
|
color p[256]; /* Our palette */
|
|
block sprites[1001]; /* Pointers to blocks */
|
|
|
|
char *scrolltext="THIS IS A SMALL TEXT SCROLLER CREATED WITH THE WCOPYSCREEN COMMAND. PRESS A KEY TO END THIS SCROLLER... ";
|
|
|
|
int scrnum; /* Counter for current letter of scroller */
|
|
int nextlet, i, j; /* Counters */
|
|
|
|
set_clock_rate(get_max_clock());
|
|
mem_init();
|
|
vga256 (); /* Initialize graphics mode */
|
|
|
|
for (i = 0; i < 180; i++) /* Draws a background for the screen */
|
|
{
|
|
wsetcolor (vgapal[i]);
|
|
wline (0, 0, 319, i);
|
|
wline (319, 199, 0, 180 - i);
|
|
}
|
|
|
|
wsetcolor (vgapal[0]); /* Draw with black */
|
|
wbar (0, 189, 319, 199); /* Clear area off bottom for scroller */
|
|
|
|
extern unsigned char _binary_bin_letters_spr_start[];
|
|
unsigned char *lettersspr = &_binary_bin_letters_spr_start[0];
|
|
wloadsprites (p, lettersspr, sprites, 0, 1000); // Load our blocks
|
|
|
|
do {
|
|
scrnum = 0; /* Start at first character of scroller string */
|
|
do {
|
|
/* Find pixel width of current letter in string */
|
|
nextlet = wgetblockwidth (sprites[scrolltext[scrnum] + 1]);
|
|
for (j = 0; j <= nextlet + 1; j += 2)
|
|
{
|
|
wbar (318, 189, 319, 199); /* Erase right-hand side of scroller area */
|
|
|
|
/* Now copy the last letter on at the end of the string */
|
|
wputblock (319 - j, 189, sprites[scrolltext[scrnum] + 1], 0);
|
|
|
|
/* Wait for monitor to finish vertical retrace */
|
|
wait_msec(0x3E9F); // Ugly - this needs to sync better... could use the timer I suppose... NITV!
|
|
|
|
/* Shift scroller to the left */
|
|
wcopyscreen (2, 189, 319, 199, NULL, 0, 189, NULL);
|
|
}
|
|
scrnum++; /* Advance to next letter */
|
|
} while (scrolltext[scrnum + 1] != 0);
|
|
} while (1);
|
|
|
|
wfreesprites (sprites, 0, 1000); /* Free our sprites */
|
|
}
|
|
|
|
void main()
|
|
{
|
|
wgt29();
|
|
while (1);
|
|
}
|