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[FILE BEGIN]
1/*
2  Copyright (C) 1997-2025 Sam Lantinga <[email protected]>
3
4  This software is provided 'as-is', without any express or implied
5  warranty.  In no event will the authors be held liable for any damages
6  arising from the use of this software.
7
8  Permission is granted to anyone to use this software for any purpose,
9  including commercial applications, and to alter it and redistribute it
10  freely.
11*/
12#define SDL_MAIN_USE_CALLBACKS 1  /* use the callbacks instead of main() */
13#include <SDL3/SDL.h>
14#include <SDL3/SDL_main.h>
15
16static SDL_Window *window = NULL;
17static SDL_Renderer *renderer = NULL;
18
19/* This function runs once at startup. */
20SDL_AppResult SDL_AppInit(void **appstate, int argc, char *argv[])
21{
22    /* Create the window */
23    if (!SDL_CreateWindowAndRenderer("Hello World", 800, 600, SDL_WINDOW_FULLSCREEN, &window, &renderer)) {
24        SDL_Log("Couldn't create window and renderer: %s", SDL_GetError());
25        return SDL_APP_FAILURE;
26    }
27    return SDL_APP_CONTINUE;
28}
29
30/* This function runs when a new event (mouse input, keypresses, etc) occurs. */
31SDL_AppResult SDL_AppEvent(void *appstate, SDL_Event *event)
32{
33    if (event->type == SDL_EVENT_KEY_DOWN ||
34        event->type == SDL_EVENT_QUIT) {
35        return SDL_APP_SUCCESS;  /* end the program, reporting success to the OS. */
36    }
37    return SDL_APP_CONTINUE;
38}
39
40/* This function runs once per frame, and is the heart of the program. */
41SDL_AppResult SDL_AppIterate(void *appstate)
42{
43    const char *message = "Hello World!";
44    int w = 0, h = 0;
45    float x, y;
46    const float scale = 4.0f;
47
48    /* Center the message and scale it up */
49    SDL_GetRenderOutputSize(renderer, &w, &h);
50    SDL_SetRenderScale(renderer, scale, scale);
51    x = ((w / scale) - SDL_DEBUG_TEXT_FONT_CHARACTER_SIZE * SDL_strlen(message)) / 2;
52    y = ((h / scale) - SDL_DEBUG_TEXT_FONT_CHARACTER_SIZE) / 2;
53
54    /* Draw the message */
55    SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
56    SDL_RenderClear(renderer);
57    SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255);
58    SDL_RenderDebugText(renderer, x, y, message);
59    SDL_RenderPresent(renderer);
60
61    return SDL_APP_CONTINUE;
62}
63
64/* This function runs once at shutdown. */
65void SDL_AppQuit(void *appstate, SDL_AppResult result)
66{
67}
68
69
[FILE END]
(C) 2025 0x4248
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