Zig SDL2 Template

main.zig

const std = @import("std");

// import the C headers here:
const c = @cImport({
    @cInclude("SDL.h");
    @cInclude("SDL_image.h");
});

/// game entry point which may return an error.
/// if the error is error.SdlError, SDL_GetError() will be called
/// and the message will be displayed.
pub fn gameMain() !void {
    if (c.SDL_Init(c.SDL_INIT_VIDEO) < 0)
        return error.SdlError;
    defer c.SDL_Quit();

    var window = c.SDL_CreateWindow(
        c"My SDL2 Application",
        c.SDL_WINDOWPOS_CENTERED_MASK,
        c.SDL_WINDOWPOS_CENTERED_MASK,
        1280,
        720,
        c.SDL_WINDOW_SHOWN,
    ) orelse return error.SdlError;
    defer c.SDL_DestroyWindow(window);

    var renderer = c.SDL_CreateRenderer(
        window,
        -1,
        c.SDL_RENDERER_ACCELERATED,
    ) orelse return error.SdlError;
    defer c.SDL_DestroyRenderer(renderer);

    mainLoop: while (true) {
        var ev: c.SDL_Event = undefined;
        while (c.SDL_PollEvent(&ev) != 0) {
            switch (ev.type) {
                c.SDL_QUIT => {
                    break :mainLoop;
                },

                else => {},
            }
        }

        _ = c.SDL_RenderClear(renderer);

        _ = c.SDL_RenderPresent(renderer);
    }
}

/// wraps gameMain, so we can react to an SdlError and print
/// its error message
pub fn main() !void {
    gameMain() catch |err| switch (err) {
        error.SdlError => {
            std.debug.warn("SDL Failure: {c}", c.SDL_GetError());
            return err;
        },
        else => return err,
    };
}