Fixed Metal backend with high_dpi = false

[birhburh]

Example code

use macroquad::prelude::*;

fn window_conf() -> Conf {
    Conf {
        window_title: "Heavy Metal Example".to_owned(),
        platform: miniquad::conf::Platform {
            blocking_event_loop: true,
            apple_gfx_api: miniquad::conf::AppleGfxApi::Metal,
            ..Default::default()
        },
        // high_dpi: true,
        ..Default::default()
    }
}

#[macroquad::main(window_conf)]
async fn main() {
    macroquad::miniquad::window::schedule_update();
    loop {
        clear_background(LIGHTGRAY);
        draw_line(
            0.,
            screen_height() / 2.,
            screen_width(),
            screen_height() / 2.,
            2.,
            BLACK,
        );
        draw_line(
            screen_width() / 2.,
            0.,
            screen_width() / 2.,
            screen_height(),
            2.,
            BLACK,
        );

        let rect_width = screen_width() / 2. - 2.;
        let rect_height = screen_height() / 2. - 2.;

        let font_size = 72.;
        {
            let text = "1";
            let text_size = measure_text(text, None, font_size as _, 1.0);

            draw_text(
                text,
                rect_width / 2. - text_size.width / 2.,
                rect_height / 2. + text_size.height / 2.,
                font_size,
                RED,
            );
        }
        {
            let text = "2";
            let text_size = measure_text(text, None, font_size as _, 1.0);

            draw_text(
                text,
                rect_width + rect_width / 2. - text_size.width / 2.,
                rect_height / 2. + text_size.height / 2.,
                font_size,
                GREEN,
            );
        }
        {
            let text = "3";
            let text_size = measure_text(text, None, font_size as _, 1.0);

            draw_text(
                text,
                rect_width / 2. - text_size.width / 2.,
                rect_height + rect_height / 2. + text_size.height / 2.,
                font_size,
                BLUE,
            );
        }
        {
            let text = "4";
            let text_size = measure_text(text, None, font_size as _, 1.0);

            draw_text(
                text,
                rect_width + rect_width / 2. - text_size.width / 2.,
                rect_height + rect_height / 2. + text_size.height / 2.,
                font_size,
                BLACK,
            );
        }
        next_frame().await
    }
}

For Metal/high_dpi=false it looked like this:

For other combinations (Opengl/high_dpi=false, Opengl/high_dpi=true, Metal/high_dpi=true) it looked like this:

Now it looks as above for Metal/high_dpi=false also

[not-fl3]

Thanks for all your PRs, great work!