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sdl3: speed limiter and cmdline map selection

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erysdren 2024-10-13 10:09:02 -05:00
parent 35e58e9e13
commit 5ec96d087a
1 changed files with 37 additions and 5 deletions
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38
platform/sdl3/main.c
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@ -7,6 +7,8 @@
#include "game.h"
#include "maps.h"
#define MAXFPS (60)
static yeti_t yeti;
static u16 backbuffer[YETI_FRAMEBUFFER_WIDTH * YETI_FRAMEBUFFER_HEIGHT];
@ -18,6 +20,10 @@ static SDL_Surface *back = NULL;
static bool focused = true;
static Sint64 now = 0, then = 0;
static int requested_map = 0;
static void die(const char *fmt, ...)
{
static char error[1024];
@ -78,14 +84,29 @@ SDL_AppResult SDL_AppInit(void **appstate, int argc, char **argv)
yeti_init(&yeti, backbuffer, backbuffer, textures, palette);
yeti_init_lua(&yeti, YETI_GAMMA);
game_init(&yeti);
/* get requested map */
if (argc > 1)
requested_map = SDL_atoi(argv[1]);
SDL_Log("Loading map %d", requested_map);
if (requested_map >= 0)
game_load_map(&yeti, maps[requested_map]);
else
game_load_map(&yeti, &map_e1m1);
game_goto(&yeti.game, GAME_MODE_PLAY);
/* start counting time */
then = SDL_GetTicks();
return SDL_APP_CONTINUE;
}
SDL_AppResult SDL_AppIterate(void *appstate)
void do_frame(Sint64 dt)
{
static Sint64 frame_delta = 1000;
const bool *keys = SDL_GetKeyboardState(NULL);
yeti.keyboard.state.up = keys[SDL_SCANCODE_UP] || keys[SDL_SCANCODE_W];
@ -98,10 +119,21 @@ SDL_AppResult SDL_AppIterate(void *appstate)
yeti.keyboard.state.r = keys[SDL_SCANCODE_Z];
yeti.keyboard.state.select = keys[SDL_SCANCODE_ESCAPE];
SDL_FillSurfaceRect(back, NULL, 0);
SDL_FillSurfaceRect(front, NULL, 0);
frame_delta += dt;
if (frame_delta > (1000 / MAXFPS))
{
game_loop(&yeti);
frame_delta = 0;
}
}
SDL_AppResult SDL_AppIterate(void *appstate)
{
/* speed limiter */
now = SDL_GetTicks();
do_frame(now - then);
then = now;
SDL_BlitSurface(back, NULL, front, NULL);
SDL_UpdateTexture(texture, NULL, front->pixels, front->pitch);