use super::canvas::Canvas;
const ON: u8 = 0xFF;
const THIRD: f64 = 1.0 / 3.0;
const TWO_THIRDS: f64 = 2.0 / 3.0;
pub fn draw(cp: u32, canvas: &mut Canvas) -> bool {
match cp {
0x1FB00..=0x1FB3B => sextant(cp, canvas),
0x1CD00..=0x1CDE5 => octant(OCTANT_PATTERNS[(cp & 0xFF) as usize], canvas),
0x1CEA0 => octant(0b1000_0000, canvas), 0x1CEA3 => octant(0b0100_0000, canvas), 0x1CEA8 => octant(0b0000_0001, canvas), 0x1CEAB => octant(0b0000_0010, canvas), 0x1FBE6 => octant(0b0001_0100, canvas), 0x1FBE7 => octant(0b0010_1000, canvas), _ => return false,
}
true
}
fn sextant(cp: u32, canvas: &mut Canvas) {
let idx = cp - 0x1FB00;
let pattern = (idx + idx / 0x14 + 1) as u8;
let cells = [
(0x01u8, 0.0, 0.5, 0.0, THIRD), (0x02, 0.5, 1.0, 0.0, THIRD), (0x04, 0.0, 0.5, THIRD, TWO_THIRDS), (0x08, 0.5, 1.0, THIRD, TWO_THIRDS), (0x10, 0.0, 0.5, TWO_THIRDS, 1.0), (0x20, 0.5, 1.0, TWO_THIRDS, 1.0), ];
for (mask, x0, x1, y0, y1) in cells {
if pattern & mask != 0 {
canvas.fill_fraction(x0, x1, y0, y1, ON);
}
}
}
fn octant(pattern: u8, canvas: &mut Canvas) {
const Q: [f64; 5] = [0.0, 0.25, 0.5, 0.75, 1.0];
for bit in 0..8u8 {
if pattern & (1u8 << bit) != 0 {
let col = bit % 2;
let row = (bit / 2) as usize;
let (x0, x1) = if col == 0 { (0.0, 0.5) } else { (0.5, 1.0) };
canvas.fill_fraction(x0, x1, Q[row], Q[row + 1], ON);
}
}
}
const OCTANT_PATTERNS: [u8; 230] = [
0b00000100, 0b00000110, 0b00000111, 0b00001000, 0b00001001, 0b00001011, 0b00001100, 0b00001101, 0b00001110, 0b00010000, 0b00010001, 0b00010010, 0b00010011, 0b00010101, 0b00010110, 0b00010111, 0b00011000, 0b00011001, 0b00011010, 0b00011011, 0b00011100, 0b00011101, 0b00011110, 0b00011111, 0b00100000, 0b00100001, 0b00100010, 0b00100011, 0b00100100, 0b00100101, 0b00100110, 0b00100111, 0b00101001, 0b00101010, 0b00101011, 0b00101100, 0b00101101, 0b00101110, 0b00101111, 0b00110000, 0b00110001, 0b00110010, 0b00110011, 0b00110100, 0b00110101, 0b00110110, 0b00110111, 0b00111000, 0b00111001, 0b00111010, 0b00111011, 0b00111100, 0b00111101, 0b00111110, 0b01000001, 0b01000010, 0b01000011, 0b01000100, 0b01000101, 0b01000110, 0b01000111, 0b01001000, 0b01001001, 0b01001010, 0b01001011, 0b01001100, 0b01001101, 0b01001110, 0b01001111, 0b01010001, 0b01010010, 0b01010011, 0b01010100, 0b01010110, 0b01010111, 0b01011000, 0b01011001, 0b01011011, 0b01011100, 0b01011101, 0b01011110, 0b01100000, 0b01100001, 0b01100010, 0b01100011, 0b01100100, 0b01100101, 0b01100110, 0b01100111, 0b01101000, 0b01101001, 0b01101010, 0b01101011, 0b01101100, 0b01101101, 0b01101110, 0b01101111, 0b01110000, 0b01110001, 0b01110010, 0b01110011, 0b01110100, 0b01110101, 0b01110110, 0b01110111, 0b01111000, 0b01111001, 0b01111010, 0b01111011, 0b01111100, 0b01111101, 0b01111110, 0b01111111, 0b10000001, 0b10000010, 0b10000011, 0b10000100, 0b10000101, 0b10000110, 0b10000111, 0b10001000, 0b10001001, 0b10001010, 0b10001011, 0b10001100, 0b10001101, 0b10001110, 0b10001111, 0b10010000, 0b10010001, 0b10010010, 0b10010011, 0b10010100, 0b10010101, 0b10010110, 0b10010111, 0b10011000, 0b10011001, 0b10011010, 0b10011011, 0b10011100, 0b10011101, 0b10011110, 0b10011111, 0b10100001, 0b10100010, 0b10100011, 0b10100100, 0b10100110, 0b10100111, 0b10101000, 0b10101001, 0b10101011, 0b10101100, 0b10101101, 0b10101110, 0b10110000, 0b10110001, 0b10110010, 0b10110011, 0b10110100, 0b10110101, 0b10110110, 0b10110111, 0b10111000, 0b10111001, 0b10111010, 0b10111011, 0b10111100, 0b10111101, 0b10111110, 0b10111111, 0b11000001, 0b11000010, 0b11000011, 0b11000100, 0b11000101, 0b11000110, 0b11000111, 0b11001000, 0b11001001, 0b11001010, 0b11001011, 0b11001100, 0b11001101, 0b11001110, 0b11001111, 0b11010000, 0b11010001, 0b11010010, 0b11010011, 0b11010100, 0b11010101, 0b11010110, 0b11010111, 0b11011000, 0b11011001, 0b11011010, 0b11011011, 0b11011100, 0b11011101, 0b11011110, 0b11011111, 0b11100000, 0b11100001, 0b11100010, 0b11100011, 0b11100100, 0b11100101, 0b11100110, 0b11100111, 0b11101000, 0b11101001, 0b11101010, 0b11101011, 0b11101100, 0b11101101, 0b11101110, 0b11101111, 0b11110001, 0b11110010, 0b11110011, 0b11110100, 0b11110110, 0b11110111, 0b11111000, 0b11111001, 0b11111011, 0b11111101, 0b11111110, ];