feat: run example project with SDL3

.gitignore

@@ -1,3 +1,6 @@
+# Build outputs
+out/
+
 # Prerequisites
 *.d
 

Makefile

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+compile:
+	gcc -W -Wall -Wextra -pedantic -o out/main src/main.c -Iinclude -lpthread -Llib -lSDL3
+
+
+run:
+	make compile	
+	./out/main

src/main.c

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+/*
+ * This example code creates an SDL window and renderer, and then clears the
+ * window to a different color every frame, so you'll effectively get a window
+ * that's smoothly fading between colors.
+ *
+ * This code is public domain. Feel free to use it for any purpose!
+ */
+
+#define SDL_MAIN_USE_CALLBACKS 1 /* use the callbacks instead of main() */
+#include <SDL3/SDL.h>
+#include <SDL3/SDL_main.h>
+
+/* We will use this renderer to draw into this window every frame. */
+static SDL_Window *window = NULL;
+static SDL_Renderer *renderer = NULL;
+
+/* This function runs once at startup. */
+SDL_AppResult SDL_AppInit(void **appstate, int argc, char *argv[]) {
+    SDL_SetAppMetadata("Example Renderer Clear", "1.0",
+                       "com.example.renderer-clear");
+
+    if (!SDL_Init(SDL_INIT_VIDEO)) {
+        SDL_Log("Couldn't initialize SDL: %s", SDL_GetError());
+        return SDL_APP_FAILURE;
+    }
+
+    if (!SDL_CreateWindowAndRenderer("examples/renderer/clear", 640, 480, 0,
+                                     &window, &renderer)) {
+        SDL_Log("Couldn't create window/renderer: %s", SDL_GetError());
+        return SDL_APP_FAILURE;
+    }
+
+    return SDL_APP_CONTINUE; /* carry on with the program! */
+}
+
+/* This function runs when a new event (mouse input, keypresses, etc) occurs. */
+SDL_AppResult SDL_AppEvent(void *appstate, SDL_Event *event) {
+    if ((event->type == SDL_EVENT_KEY_UP &&
+         event->key.scancode == SDL_SCANCODE_ESCAPE) ||
+        event->type == SDL_EVENT_QUIT) {
+        return SDL_APP_SUCCESS; /* end the program, reporting success to the OS.
+                                 */
+    }
+    return SDL_APP_CONTINUE; /* carry on with the program! */
+}
+
+/* This function runs once per frame, and is the heart of the program. */
+SDL_AppResult SDL_AppIterate(void *appstate) {
+    const double now = ((double)SDL_GetTicks()) /
+                       1000.0; /* convert from milliseconds to seconds. */
+    /* choose the color for the frame we will draw. The sine wave trick makes it
+     * fade between colors smoothly. */
+    const float red = (float)(0.5 + 0.5 * SDL_sin(now));
+    const float green = (float)(0.5 + 0.5 * SDL_sin(now + SDL_PI_D * 2 / 3));
+    const float blue = (float)(0.5 + 0.5 * SDL_sin(now + SDL_PI_D * 4 / 3));
+    SDL_SetRenderDrawColorFloat(
+        renderer, red, green, blue,
+        SDL_ALPHA_OPAQUE_FLOAT); /* new color, full alpha. */
+
+    /* clear the window to the draw color. */
+    SDL_RenderClear(renderer);
+
+    /* put the newly-cleared rendering on the screen. */
+    SDL_RenderPresent(renderer);
+
+    return SDL_APP_CONTINUE; /* carry on with the program! */
+}
+
+/* This function runs once at shutdown. */
+void SDL_AppQuit(void *appstate, SDL_AppResult result) {
+    /* SDL will clean up the window/renderer for us. */
+}