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/*
* utils.c
*
* Utility functions
*/
#include "graphics.h"
#include "grv.h"
/* Foreground color of a specific character */
int fg(int r, int c)
{
return screen1(r,c) & 15;
}
/* Background color of a specific character */
int bg(int r, int c)
{
return (screen1(r,c) >> 4) & 7;
}
/* Is there something at this screen location? */
int busy(int r, int c)
{
return (screen(r,c) != ' ') || (bg(r,c) == 0);
}
/* Format time elapsed in MM:SS.s format */
char *format_time(double t)
{
static char ts[10];
int ds = (int)(t*10.0); /* Deciseconds */
sprintf(ts, "%02d:%02d.%01d", ds/600, (ds%600)/10, ds%10);
return ts;
}
/* Standard callback routine to post a periodic user event */
/* (int)param is the event code */
Uint32 post_periodic(Uint32 interval, void *param)
{
SDL_Event event;
event.type = SDL_USEREVENT;
event.user.code = (size_t)param;
event.user.data1 = event.user.data2 = 0;
SDL_PushEvent(&event);
return interval;
}
/* Standard callback routine to post a periodic user event */
/* (int)param is the event code */
Uint32 post_oneshot(Uint32 interval, void *param)
{
SDL_Event event;
event.type = SDL_USEREVENT;
event.user.code = (size_t)param;
event.user.data1 = event.user.data2 = 0;
(void)interval;
SDL_PushEvent(&event);
return 0;
}
/* Very simple event handler which just posts a timer and handles
blink events until the timer expires */
void mymssleep(int ms)
{
SDL_TimerID mytimer = SDL_AddTimer(ms, post_oneshot, (void *)event_sleep);
SDL_Event event;
update_screen();
while ( SDL_WaitEvent(&event) ) {
if ( event.type == SDL_USEREVENT ) {
if ( event.user.code == event_sleep ) {
SDL_RemoveTimer(mytimer);
return;
} else if ( event.user.code == event_blink )
update_blink();
} else if ( event.type == SDL_KEYDOWN ) {
push_key(&event.key);
}
}
}
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