chiropterm 0.2.0

bat-themed fake terminal in the style of libtcod
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use euclid::size2;

use crate::{aliases::*, drawing::Brushable, formatting::FChar};

use super::{cell::SemanticContent, sprite::{Tile, TileSet}};

const BITMAP: &'static [u8; 0x1000] = include_bytes!("font.bin");
const BITMAP_SMALL: &'static [u8; 0x800] = include_bytes!("font_small.bin");
const BITMAP_FAT: &'static [u8; 0x2000] = include_bytes!("font_fat.bin");

const FONT: TileSet<'static> = TileSet {
    buf: BITMAP,
    overall_size: PixelSize::new(256, 128),
};

const FONT_SMALL: TileSet<'static> = TileSet {
    buf: BITMAP_SMALL,
    overall_size: PixelSize::new(128, 128),
};

const FONT_FAT: TileSet<'static> = TileSet {
    buf: BITMAP_FAT,
    overall_size: PixelSize::new(256, 256),
};

#[derive(Clone, Copy)]
pub enum Font {
    Normal,
    Small,
    Set,
    Fat,
}

impl Font {
    pub fn char_size(&self) -> CellSize {
        match self {
            Font::Normal => size2(1, 2),
            Font::Small => size2(1, 1),
            Font::Set => size2(2, 2),
            Font::Fat => size2(2, 2),
        }
    }

    pub(crate) fn draw_char(&self, at: CellPoint, f: FChar, stamp: &mut impl Brushable) {
        match self {
            Font::Normal => {
                stamp.draw(at + vec2(0, 0), f.sem(SemanticContent::TopHalf));
                stamp.draw(at + vec2(0, 1), f.sem(SemanticContent::BottomHalf));
            }
            Font::Small => {
                stamp.draw(at + vec2(0, 0), f.sem(SemanticContent::Small))
            }
            Font::Set => {
                stamp.draw(at + vec2(0, 0), f.sem(SemanticContent::SetTL));
                stamp.draw(at + vec2(0, 1), f.sem(SemanticContent::SetBL));
                stamp.draw(at + vec2(1, 0), f.sem(SemanticContent::SetTR));
                stamp.draw(at + vec2(1, 1), f.sem(SemanticContent::SetBR));
            }
            Font::Fat => {
                stamp.draw(at + vec2(0, 0), f.sem(SemanticContent::FatTL));
                stamp.draw(at + vec2(0, 1), f.sem(SemanticContent::FatBL));
                stamp.draw(at + vec2(1, 0), f.sem(SemanticContent::FatTR));
                stamp.draw(at + vec2(1, 1), f.sem(SemanticContent::FatBR));
            }
        }
    }
}

pub fn eval(content: SemanticContent) -> Tile {
    match content {
        SemanticContent::Blank => { Tile([0; 8]) }
        SemanticContent::TopHalf(u) => { FONT.tile((u as usize) * 2) }
        SemanticContent::BottomHalf(u) => { FONT.tile((u as usize) * 2 + 1) }

        SemanticContent::Small(u) => { FONT_SMALL.tile(u as usize) }
        
        SemanticContent::SetTL(u) => { FONT.tile((u as usize) * 2).left() }
        SemanticContent::SetTR(u) => { FONT.tile((u as usize) * 2).right() }
        SemanticContent::SetBL(u) => { FONT.tile((u as usize) * 2 + 1).left() }
        SemanticContent::SetBR(u) => { FONT.tile((u as usize) * 2 + 1).right() }

        SemanticContent::FatTL(u) => { FONT_FAT.tile((u as usize) * 4) }
        SemanticContent::FatTR(u) => { FONT_FAT.tile((u as usize) * 4 + 1) }
        SemanticContent::FatBL(u) => { FONT_FAT.tile((u as usize) * 4 + 2) }
        SemanticContent::FatBR(u) => { FONT_FAT.tile((u as usize) * 4 + 3) }

        SemanticContent::SmallPizza1(u1, u2) => {
            Tile(
                from_u64(
                    to_u64(FONT_SMALL.tile(u1 as usize).0) & (!0b11111110_11111100_11111000_11110000_11100000_11000000_10000000_00000000) |
                    to_u64(FONT_SMALL.tile(u2 as usize).0) & ( 0b11111110_11111100_11111000_11110000_11100000_11000000_10000000_00000000)
                )
            )
        }
        SemanticContent::SmallPizza2(u1, u2) => {
            Tile(
                from_u64(
                    to_u64(FONT_SMALL.tile(u1 as usize).0) & (!0b01111111_00111111_00011111_00001111_00000111_00000011_00000001_00000000) |
                    to_u64(FONT_SMALL.tile(u2 as usize).0) & ( 0b01111111_00111111_00011111_00001111_00000111_00000011_00000001_00000000)
                )
            )
        }
    }
}

const fn to_u64(u8s: [u8; 8]) -> u64 {
    u64::from_le_bytes(u8s)
}

const fn from_u64(u: u64) -> [u8; 8] {
    u64::to_le_bytes(u)
}