// VGUI_Surface
// draw_set_color - 15 | draw_filled_rect_fade - 123
void draw_gradient_rect(int x, int y, int w, int h, color c, color c_, bool horizontal = false) {
draw_set_color(c.red, c.green, c.blue, c.alpha);
draw_filled_rect_fade(x, y, w, h, 255, 0, horizontal);
draw_set_color(c_.red, c_.green, c_.blue, c_.alpha);
draw_filled_rect_fade(x, y, w, h, 0, 255, horizontal);
}