gistfile1.txt

#include <iostream>
#include <cstdint>
#include <GL/glew.h>

#include "SDL.h"

#define INITIAL_WINDOW_WIDTH    600
#define INITIAL_WINDOW_HEIGHT   600

static inline void bailSDL(char *msg) {
    std::cerr << msg << " : SDL Error: " << SDL_GetError() << std::endl;
    SDL_Quit();
}

static SDL_Window * setupSDL() {
    if (SDL_Init(SDL_INIT_VIDEO) < 0) 
        return bailSDL("Accidentally the entire SDL_Init"), NULL;

    SDL_Window *sdlWin = SDL_CreateWindow("goddamnit conan", 
        SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
        INITIAL_WINDOW_WIDTH, INITIAL_WINDOW_HEIGHT,
        SDL_WINDOW_OPENGL);

    if (sdlWin == NULL)
        return bailSDL("SDL_CreateWindow()"), NULL;

    return sdlWin;
}

void initGL(SDL_GLContext gl, SDL_Window* sdlWin) {
    glClearColor(0, 0, 1, 1);
}

void updateGL(SDL_GLContext gl, SDL_Window* sdlWin) {
    int w, h;
    SDL_GetWindowSize(sdlWin, &w, &h);

    glViewport(0, 0, w, h);
    glClear(GL_COLOR_BUFFER_BIT);
}

int main(int argc, char* argv[]) {
    std::cout << "Hello, World!" << std::endl;

    SDL_Window* sdlWindow = setupSDL();
    SDL_GLContext gl = SDL_GL_CreateContext(sdlWindow);

    initGL(gl, sdlWindow);

    bool running = true;
    while (running) {
        SDL_Event ev;

        // Empty the SDL event queue before talking to the GL
        //
        // Because that will never bite us in the ass or stall frames
        // *facepalm*
        while (SDL_PollEvent(&ev) && running)
        {
            if (ev.type == SDL_KEYDOWN)
            {
                switch (ev.key.keysym.sym)
                {
                case SDLK_ESCAPE:
                case SDLK_q:
                    running = false;
                    break;
                default:
                    break;
                }
            }
            else if (ev.type == SDL_QUIT)
            {
                running = false;
            }
        }

        if (running) {
            updateGL(gl, sdlWindow);
            SDL_GL_SwapWindow(sdlWindow);
        }
    }
    SDL_Quit();
    std::cout << "I don't believe that worked." << std::endl;
    return 0;
}