akern-gkgoat-fork/ableos/src/vga_e.rs

use {
    ab_glyph::{Font, FontRef, Glyph},
    vga::{
        colors::Color16,
        writers::{Graphics640x480x16, GraphicsWriter},
    },
};

lazy_static::lazy_static! {
    pub static ref VGAE: spin::Mutex<Graphics640x480x16> = {
        let xyz =  Graphics640x480x16::new();
        xyz.set_mode();
        spin::Mutex::new(xyz)
    };
     pub static ref VGAE_BUFF_OFFSET_X: spin::Mutex<u8> = spin::Mutex::new(0);
     pub static ref VGAE_BUFF_OFFSET_Y: spin::Mutex<u8> = spin::Mutex::new(0);
}

pub fn test_it_fucko() {
    let mode = Graphics640x480x16::new();
    mode.set_mode();
    mode.clear_screen(Color16::Black);

    mode.draw_line((80, 60), (80, 420), Color16::White);
    mode.draw_line((80, 60), (540, 60), Color16::White);

    {
        let offset = 110;
        mode.draw_character(offset - 15 - 4, 60 + 15 - 4, 'x', Color16::Red);

        mode.draw_line(
            (offset.try_into().unwrap(), 60),
            (offset.try_into().unwrap(), 90),
            Color16::White,
        );
    }

    mode.draw_line((80, 420), (540, 420), Color16::White);
    mode.draw_line((540, 420), (540, 60), Color16::White);
    mode.draw_line((80, 90), (540, 90), Color16::White);

    for (offset, character) in "ableOS".chars().enumerate() {
        mode.draw_character(270 + offset * 8, 72, character, Color16::White)
    }
}

pub trait GraphicsAPI {
    fn add_shader() {}
}

pub fn draw_char(character: char, _offset: usize) {
    let mode = *VGAE.lock();
    let mut offset_x = VGAE_BUFF_OFFSET_X.lock();
    let mut offset_y = VGAE_BUFF_OFFSET_Y.lock();

    if *offset_x == 39 {
        *offset_x = 0;
        *offset_y += 1;
    }

    let font = FontRef::try_from_slice(include_bytes!(
        "../../ableos/assets/fonts/unifont-14.0.01.ttf"
    ))
    .unwrap();

    let font2 = FontRef::try_from_slice(include_bytes!(
        "../../ableos/assets/fonts/unifont_upper-14.0.01.ttf"
    ))
    .unwrap();

    let mut has_char = false;
    for x in font.codepoint_ids() {
        if x.1 == character {
            has_char = true;
            break;
        }
    }

    let used_font;
    match has_char {
        true => used_font = font,
        false => used_font = font2,
    }

    let font_scale = 1.6;

    match character {
        '\n' => {}
        _ => {
            let q_glyph: Glyph = used_font.glyph_id(character).with_scale_and_position(
                20.0 * font_scale,
                ab_glyph::point(
                    *offset_x as f32 * (10.0 * font_scale),
                    *offset_y as f32 + (18.0 * font_scale),
                ),
            );
            if let Some(q) = used_font.outline_glyph(q_glyph) {
                q.draw(|x, y, c| {
                    if c > 0.015 {
                        let corner = q.px_bounds().min;
                        mode.set_pixel(
                            x as usize + corner.x as usize,
                            y as usize + corner.y as usize,
                            Color16::Green,
                        );
                    }
                });
            }

            *offset_x += 1;
        }
    }
}