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Merged show() and gameloop()

This commit is contained in:
Devine Lu Linvega 2023-07-25 14:56:26 -07:00
parent db2117ee0a
commit 12509b7e6b
1 changed files with 26 additions and 36 deletions
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62
src/uxnemu.c
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@ -42,7 +42,6 @@ WITH REGARD TO THIS SOFTWARE.
#define WIDTH 64 * 8
#define HEIGHT 40 * 8
#define TIMEOUT_MS 334
#define BENCH 0
static SDL_Window *emu_window;
static SDL_Texture *emu_texture;
@ -443,41 +442,10 @@ handle_events(Uxn *u)
}
static int
gameloop(Uxn *u)
run(Uxn *u)
{
Uint64 next_refresh = 0;
Uint64 now;
Uint64 frame_interval = SDL_GetPerformanceFrequency() / 60;
for(;;) {
Uint16 screen_vector;
/* .System/halt */
if(u->dev[0x0f])
return system_error("Run", "Ended.");
now = SDL_GetPerformanceCounter();
exec_deadline = now + deadline_interval;
if(!handle_events(u))
return 0;
screen_vector = PEEK2(&u->dev[0x20]);
if(BENCH || now >= next_refresh) {
now = SDL_GetPerformanceCounter();
next_refresh = now + frame_interval;
uxn_eval(u, screen_vector);
if(uxn_screen.x2)
emu_redraw();
}
if(BENCH) {
/* no delay */
} else if(screen_vector || uxn_screen.x2) {
Uint64 delay_ms = (next_refresh - now) / ms_interval;
if(delay_ms > 0) SDL_Delay(delay_ms);
} else
SDL_WaitEvent(NULL);
}
}
int
show(void)
{
window_created = 1;
emu_window = SDL_CreateWindow("Uxn", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, uxn_screen.width * zoom, uxn_screen.height * zoom, SDL_WINDOW_SHOWN | SDL_WINDOW_ALLOW_HIGHDPI);
if(emu_window == NULL)
@ -486,7 +454,30 @@ show(void)
if(emu_renderer == NULL)
return system_error("sdl_renderer", SDL_GetError());
emu_resize(uxn_screen.width, uxn_screen.height);
return 1;
/* game loop */
for(;;) {
Uint16 screen_vector;
Uint64 now = SDL_GetPerformanceCounter();
/* .System/halt */
if(u->dev[0x0f])
return system_error("Run", "Ended.");
exec_deadline = now + deadline_interval;
if(!handle_events(u))
return 0;
screen_vector = PEEK2(&u->dev[0x20]);
if(now >= next_refresh) {
now = SDL_GetPerformanceCounter();
next_refresh = now + frame_interval;
uxn_eval(u, screen_vector);
if(uxn_screen.x2)
emu_redraw();
}
if(screen_vector || uxn_screen.x2) {
Uint64 delay_ms = (next_refresh - now) / ms_interval;
if(delay_ms > 0) SDL_Delay(delay_ms);
} else
SDL_WaitEvent(NULL);
}
}
int
@ -512,8 +503,7 @@ main(int argc, char **argv)
console_input(&u, '\n', i == argc - 1 ? CONSOLE_END : CONSOLE_EOA);
}
/* start rom */
show();
gameloop(&u);
run(&u);
/* finished */
#ifdef _WIN32
#pragma GCC diagnostic ignored "-Wint-to-pointer-cast"