iris
206dcdedf1
git-subtree-dir: external/SDL git-subtree-split: 4d17b99d0a1c33c5257063b098f883c669ade40b
69 lines
2.2 KiB
C
69 lines
2.2 KiB
C
/*
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Copyright (C) 1997-2026 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely.
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*/
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#define SDL_MAIN_USE_CALLBACKS 1 /* use the callbacks instead of main() */
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#include <SDL3/SDL.h>
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#include <SDL3/SDL_main.h>
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static SDL_Window *window = NULL;
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static SDL_Renderer *renderer = NULL;
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/* This function runs once at startup. */
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SDL_AppResult SDL_AppInit(void **appstate, int argc, char *argv[])
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{
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/* Create the window */
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if (!SDL_CreateWindowAndRenderer("Hello World", 800, 600, SDL_WINDOW_FULLSCREEN, &window, &renderer)) {
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SDL_Log("Couldn't create window and renderer: %s", SDL_GetError());
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return SDL_APP_FAILURE;
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}
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return SDL_APP_CONTINUE;
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}
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/* This function runs when a new event (mouse input, keypresses, etc) occurs. */
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SDL_AppResult SDL_AppEvent(void *appstate, SDL_Event *event)
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{
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if (event->type == SDL_EVENT_KEY_DOWN ||
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event->type == SDL_EVENT_QUIT) {
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return SDL_APP_SUCCESS; /* end the program, reporting success to the OS. */
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}
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return SDL_APP_CONTINUE;
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}
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/* This function runs once per frame, and is the heart of the program. */
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SDL_AppResult SDL_AppIterate(void *appstate)
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{
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const char *message = "Hello World!";
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int w = 0, h = 0;
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float x, y;
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const float scale = 4.0f;
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/* Center the message and scale it up */
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SDL_GetRenderOutputSize(renderer, &w, &h);
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SDL_SetRenderScale(renderer, scale, scale);
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x = ((w / scale) - SDL_DEBUG_TEXT_FONT_CHARACTER_SIZE * SDL_strlen(message)) / 2;
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y = ((h / scale) - SDL_DEBUG_TEXT_FONT_CHARACTER_SIZE) / 2;
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/* Draw the message */
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SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
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SDL_RenderClear(renderer);
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SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255);
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SDL_RenderDebugText(renderer, x, y, message);
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SDL_RenderPresent(renderer);
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return SDL_APP_CONTINUE;
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}
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/* This function runs once at shutdown. */
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void SDL_AppQuit(void *appstate, SDL_AppResult result)
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{
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}
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