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// gcc example/c/gl_sdl2.c build/src/gl.c -Ibuild/include `sdl2-config --libs --cflags` -ldl
#include <stdlib.h>
#include <stdio.h>
#include <glad/gl.h>
#include <SDL.h>
#include <SDL_opengl.h>
const GLuint WIDTH = 800, HEIGHT = 600;
int main(void) {
// code without checking for errors
SDL_Init(SDL_INIT_VIDEO);
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 2);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
SDL_Window *window = SDL_CreateWindow(
"[glad] GL with SDL",
SDL_WINDOWPOS_CENTERED,
SDL_WINDOWPOS_CENTERED,
WIDTH, HEIGHT,
SDL_WINDOW_OPENGL | SDL_WINDOW_SHOWN
);
SDL_GLContext context = SDL_GL_CreateContext(window);
int version = gladLoadGL((GLADloadfunc) SDL_GL_GetProcAddress);
printf("GL %d.%d\n", GLAD_VERSION_MAJOR(version), GLAD_VERSION_MINOR(version));
int exit = 0;
while(!exit) {
SDL_Event event;
while (SDL_PollEvent(&event)) {
switch(event.type) {
case SDL_QUIT:
exit = 1;
break;
case SDL_KEYUP:
if (event.key.keysym.sym == SDLK_ESCAPE) {
exit = 1;
}
break;
default:
break;
}
}
glClearColor(0.7f, 0.9f, 0.1f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT);
SDL_GL_SwapWindow(window);
SDL_Delay(1);
}
SDL_GL_DeleteContext(context);
SDL_DestroyWindow(window);
SDL_Quit();
return 0;
}
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