ableOS_v1Change/ableos/src/vga_e.rs

use shadeable::pixel_format::Rgba64;

use crate::SCREEN_BUFFER;

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);
}

/// Draw a glyph on the screen at the given position
///
/// # Arguments
/// * `x` - the x position of the glyph
/// * `y` - the y position of the glyph
/// * `glyph` - the glyph to draw
/// * `color` - the color of the glyph
pub fn draw_char(x: u8, y: u8, character: char, color: Rgba64) {
    // let mode = *VGAE.lock();
    let mut mode = SCREEN_BUFFER.lock();

    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 mut q_glyph: Glyph = used_font.glyph_id(character).with_scale_and_position(
                20.0 * font_scale,
                ab_glyph::point(10.0 * font_scale, 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,
                            color,
                        );
                    }
                });
            }
        }
    }
}
pub fn num_to_vga16(num: u8) -> Color16 {
    use Color16::*;
    match num {
        0 => Black,
        1 => Blue,
        2 => Green,
        3 => Cyan,
        4 => Red,
        5 => Magenta,
        6 => Brown,
        7 => LightGrey,
        8 => DarkGrey,
        9 => LightBlue,
        10 => LightGreen,
        11 => LightCyan,
        12 => LightRed,
        13 => Pink,
        14 => Yellow,
        15 => White,
        // NOTE: Leasve the in
        _ => Color16::Pink,
    }
}