shader->brightness_uniform = glGetUniformLocation(shader->program, "bright");
shader->saturation_uniform = glGetUniformLocation(shader->program, "saturation");
shader->color_uniform = glGetUniformLocation(shader->program, "color");
shader->brightness_uniform = glGetUniformLocation(shader->program, "bright");
shader->saturation_uniform = glGetUniformLocation(shader->program, "saturation");
shader->color_uniform = glGetUniformLocation(shader->program, "color");