Skip to content

Instantly share code, notes, and snippets.

Embed
What would you like to do?
SDL2 sample
//SDL2 flashing random color example
//Should work on iOS/Android/Mac/Windows/Linux
#include <SDL.h>
#include <SDL_opengl.h>
#include <stdlib.h> //rand()
static bool quitting = false;
static float r = 0.0f;
static SDL_Window *window = NULL;
static SDL_GLContext gl_context;
void render() {
SDL_GL_MakeCurrent(window, gl_context);
r = static_cast <float> (rand()) / static_cast <float> (RAND_MAX);
glClearColor( r, 0.4f, 0.1f, 1.0f );
glClear( GL_COLOR_BUFFER_BIT );
SDL_GL_SwapWindow(window);
} //render
int SDLCALL watch(void *userdata, SDL_Event* event) {
if (event->type == SDL_APP_WILLENTERBACKGROUND) {
quitting = true;
}
return 1;
}
int main(int argc, char *argv[]) {
if (SDL_Init(SDL_INIT_VIDEO|SDL_INIT_EVENTS) != 0) {
SDL_Log("Failed to initialize SDL: %s", SDL_GetError());
return 1;
}
window = SDL_CreateWindow("title", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, 512, 512, SDL_WINDOW_OPENGL);
gl_context = SDL_GL_CreateContext(window);
SDL_AddEventWatch(watch, NULL);
while(!quitting) {
SDL_Event event;
while( SDL_PollEvent(&event) ) {
if(event.type == SDL_QUIT) {
quitting = true;
}
}
render();
SDL_Delay(2);
}
SDL_DelEventWatch(watch, NULL);
SDL_GL_DeleteContext(gl_context);
SDL_DestroyWindow(window);
SDL_Quit();
exit(0);
} //main
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
You can’t perform that action at this time.