diff options
Diffstat (limited to 'contrib/SDL-3.2.8/docs/hello.c')
| -rw-r--r-- | contrib/SDL-3.2.8/docs/hello.c | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/contrib/SDL-3.2.8/docs/hello.c b/contrib/SDL-3.2.8/docs/hello.c new file mode 100644 index 0000000..a825ea1 --- /dev/null +++ b/contrib/SDL-3.2.8/docs/hello.c | |||
| @@ -0,0 +1,68 @@ | |||
| 1 | /* | ||
| 2 | Copyright (C) 1997-2025 Sam Lantinga <slouken@libsdl.org> | ||
| 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 | |||
| 16 | static SDL_Window *window = NULL; | ||
| 17 | static SDL_Renderer *renderer = NULL; | ||
| 18 | |||
| 19 | /* This function runs once at startup. */ | ||
| 20 | SDL_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. */ | ||
| 31 | SDL_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. */ | ||
| 41 | SDL_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. */ | ||
| 65 | void SDL_AppQuit(void *appstate, SDL_AppResult result) | ||
| 66 | { | ||
| 67 | } | ||
| 68 | |||
