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make window test

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much of this is based on cross-referencing from
the sdl3 snake demo:
https://examples.libsdl.org/SDL3/demo/01-snake/

i need to work out an elegant system for logging.
probably involving macro wonk.
This commit is contained in:
cat 2025-05-24 19:14:51 +10:00
parent 10f98381cc
commit b320df0121
3 changed files with 64 additions and 8 deletions
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1
.gitignore vendored Normal file
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slutpet

5
dat.h Normal file
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typedef struct State State;
struct State {
SDL_Window *win;
SDL_Renderer *ren;
};

64
slutpet.c
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@ -1,27 +1,77 @@
#include <SDL3/SDL.h>
#define SDL_MAIN_USE_CALLBACKS #define SDL_MAIN_USE_CALLBACKS
#include <SDL3/SDL.h>
#include <SDL3/SDL_main.h> #include <SDL3/SDL_main.h>
#include "dat.h"
void void
SDL_AppQuit(void *appstate, SDL_AppResult result) SDL_AppQuit(void *as, SDL_AppResult res)
{ {
State *st;
st = as;
if (st) {
SDL_Log("destroy renderer...");
SDL_DestroyRenderer(st->ren);
SDL_Log("destroy window...");
SDL_DestroyWindow(st->win);
SDL_Log("free state...");
SDL_free(st);
}
SDL_Log("bye!");
return; return;
} }
SDL_AppResult SDL_AppResult
SDL_AppEvent(void *appstate, SDL_Event *event) SDL_AppEvent(void *as, SDL_Event *ev)
{ {
switch (ev->type) {
case SDL_EVENT_QUIT:
SDL_Log("quit requested");
return SDL_APP_SUCCESS; return SDL_APP_SUCCESS;
break; /* unreachable; here for visual symmetry */
}
return SDL_APP_CONTINUE;
} }
SDL_AppResult SDL_AppResult
SDL_AppIterate(void *appstate) SDL_AppIterate(void *as)
{ {
return SDL_APP_SUCCESS; return SDL_APP_CONTINUE;
} }
SDL_AppResult SDL_AppResult
SDL_AppInit(void **appstate, int argc, char **argv) SDL_AppInit(void **as, int argc, char **argv)
{ {
return SDL_APP_SUCCESS; State *st;
SDL_Log("init sdl...");
if (!SDL_Init(SDL_INIT_VIDEO)) {
SDL_LogCritical(SDL_LOG_CATEGORY_APPLICATION,
"sdl init fail: %s", SDL_GetError());
return SDL_APP_FAILURE;
}
SDL_Log("alloc state...");
st = SDL_calloc(1, sizeof(State));
if (!st) {
SDL_LogCritical(SDL_LOG_CATEGORY_APPLICATION,
"mem alloc fail: %s", SDL_GetError());
return SDL_APP_FAILURE;
}
*as = st;
SDL_Log("create win+render...");
if (!SDL_CreateWindowAndRenderer("slutpet", 320, 240,
SDL_WINDOW_TRANSPARENT | SDL_WINDOW_BORDERLESS,
&st->win, &st->ren)) {
SDL_LogCritical(SDL_LOG_CATEGORY_APPLICATION,
"win creation fail: %s", SDL_GetError());
return SDL_APP_FAILURE;
}
SDL_Log("it work");
return SDL_APP_CONTINUE;
} }