compile.zig

fn compileShader(file: var, shader_type: c_uint) !c.GLuint {
    std.debug.warn("shader loading file: {}\n", .{file});

    const source = try std.fs.cwd().readFileAlloc(std.heap.c_allocator, file, 1000000);
    defer std.heap.c_allocator.free(source);

    var shader = c.glCreateShader(shader_type);
    c.glShaderSource(shader, 1, &(&source[0]), null);
    c.glCompileShader(shader);
    // check for shader compile errors
    var success: c.GLint = 0;
    var infoLog = [_]u8{0} ** 512;

    c.glGetShaderiv(shader, c.GL_COMPILE_STATUS, &success);
    if (success == 0) {
        c.glGetShaderInfoLog(shader, 512, null, &infoLog);
        std.debug.warn("error compiling shader: {}\n", .{infoLog});
        return error.ShaderCompilerError;
    }

    return shader;
}