/**
 * Minimal 8x8 bitmap font for baking captions onto screenshot composites.
 *
 * Glyphs are the public-domain `font8x8_basic` set (Daniel Hepper's font8x8,
 * https://github.com/dhepper/font8x8 — public domain / "do whatever you want"),
 * printable ASCII 0x20–0x7E, plus a custom middle-dot (·, 0xB7) used as the label
 * separator. Public domain, so fine to embed under our GPLv3.
 *
 * Each glyph is 8 row-bytes (top→bottom). Within a row byte, bit `c` (LSB = 0) is
 * column `c`, left→right: pixel (c,row) is set iff `(byte >> c) & 1`.
 */

// prettier-ignore
const GLYPHS: Record<string, number[]> = {
    ' ': [0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00],
    '!': [0x18, 0x3c, 0x3c, 0x18, 0x18, 0x00, 0x18, 0x00],
    '"': [0x36, 0x36, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00],
    '#': [0x36, 0x36, 0x7f, 0x36, 0x7f, 0x36, 0x36, 0x00],
    '$': [0x0c, 0x3e, 0x03, 0x1e, 0x30, 0x1f, 0x0c, 0x00],
    '%': [0x00, 0x63, 0x33, 0x18, 0x0c, 0x66, 0x63, 0x00],
    '&': [0x1c, 0x36, 0x1c, 0x6e, 0x3b, 0x33, 0x6e, 0x00],
    "'": [0x06, 0x06, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00],
    '(': [0x18, 0x0c, 0x06, 0x06, 0x06, 0x0c, 0x18, 0x00],
    ')': [0x06, 0x0c, 0x18, 0x18, 0x18, 0x0c, 0x06, 0x00],
    '*': [0x00, 0x66, 0x3c, 0xff, 0x3c, 0x66, 0x00, 0x00],
    '+': [0x00, 0x0c, 0x0c, 0x3f, 0x0c, 0x0c, 0x00, 0x00],
    ',': [0x00, 0x00, 0x00, 0x00, 0x00, 0x0c, 0x0c, 0x06],
    '-': [0x00, 0x00, 0x00, 0x3f, 0x00, 0x00, 0x00, 0x00],
    '.': [0x00, 0x00, 0x00, 0x00, 0x00, 0x0c, 0x0c, 0x00],
    '/': [0x60, 0x30, 0x18, 0x0c, 0x06, 0x03, 0x01, 0x00],
    '0': [0x3e, 0x63, 0x73, 0x7b, 0x6f, 0x67, 0x3e, 0x00],
    '1': [0x0c, 0x0e, 0x0c, 0x0c, 0x0c, 0x0c, 0x3f, 0x00],
    '2': [0x1e, 0x33, 0x30, 0x1c, 0x06, 0x33, 0x3f, 0x00],
    '3': [0x1e, 0x33, 0x30, 0x1c, 0x30, 0x33, 0x1e, 0x00],
    '4': [0x38, 0x3c, 0x36, 0x33, 0x7f, 0x30, 0x78, 0x00],
    '5': [0x3f, 0x03, 0x1f, 0x30, 0x30, 0x33, 0x1e, 0x00],
    '6': [0x1c, 0x06, 0x03, 0x1f, 0x33, 0x33, 0x1e, 0x00],
    '7': [0x3f, 0x33, 0x30, 0x18, 0x0c, 0x0c, 0x0c, 0x00],
    '8': [0x1e, 0x33, 0x33, 0x1e, 0x33, 0x33, 0x1e, 0x00],
    '9': [0x1e, 0x33, 0x33, 0x3e, 0x30, 0x18, 0x0e, 0x00],
    ':': [0x00, 0x0c, 0x0c, 0x00, 0x00, 0x0c, 0x0c, 0x00],
    ';': [0x00, 0x0c, 0x0c, 0x00, 0x00, 0x0c, 0x0c, 0x06],
    '<': [0x18, 0x0c, 0x06, 0x03, 0x06, 0x0c, 0x18, 0x00],
    '=': [0x00, 0x00, 0x3f, 0x00, 0x00, 0x3f, 0x00, 0x00],
    '>': [0x06, 0x0c, 0x18, 0x30, 0x18, 0x0c, 0x06, 0x00],
    '?': [0x1e, 0x33, 0x30, 0x18, 0x0c, 0x00, 0x0c, 0x00],
    '@': [0x3e, 0x63, 0x7b, 0x7b, 0x7b, 0x03, 0x1e, 0x00],
    'A': [0x0c, 0x1e, 0x33, 0x33, 0x3f, 0x33, 0x33, 0x00],
    'B': [0x3f, 0x66, 0x66, 0x3e, 0x66, 0x66, 0x3f, 0x00],
    'C': [0x3c, 0x66, 0x03, 0x03, 0x03, 0x66, 0x3c, 0x00],
    'D': [0x1f, 0x36, 0x66, 0x66, 0x66, 0x36, 0x1f, 0x00],
    'E': [0x7f, 0x46, 0x16, 0x1e, 0x16, 0x46, 0x7f, 0x00],
    'F': [0x7f, 0x46, 0x16, 0x1e, 0x16, 0x06, 0x0f, 0x00],
    'G': [0x3c, 0x66, 0x03, 0x03, 0x73, 0x66, 0x7c, 0x00],
    'H': [0x33, 0x33, 0x33, 0x3f, 0x33, 0x33, 0x33, 0x00],
    'I': [0x1e, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x1e, 0x00],
    'J': [0x78, 0x30, 0x30, 0x30, 0x33, 0x33, 0x1e, 0x00],
    'K': [0x67, 0x66, 0x36, 0x1e, 0x36, 0x66, 0x67, 0x00],
    'L': [0x0f, 0x06, 0x06, 0x06, 0x46, 0x66, 0x7f, 0x00],
    'M': [0x63, 0x77, 0x7f, 0x7f, 0x6b, 0x63, 0x63, 0x00],
    'N': [0x63, 0x67, 0x6f, 0x7b, 0x73, 0x63, 0x63, 0x00],
    'O': [0x1c, 0x36, 0x63, 0x63, 0x63, 0x36, 0x1c, 0x00],
    'P': [0x3f, 0x66, 0x66, 0x3e, 0x06, 0x06, 0x0f, 0x00],
    'Q': [0x1e, 0x33, 0x33, 0x33, 0x3b, 0x1e, 0x38, 0x00],
    'R': [0x3f, 0x66, 0x66, 0x3e, 0x36, 0x66, 0x67, 0x00],
    'S': [0x1e, 0x33, 0x07, 0x0e, 0x38, 0x33, 0x1e, 0x00],
    'T': [0x3f, 0x2d, 0x0c, 0x0c, 0x0c, 0x0c, 0x1e, 0x00],
    'U': [0x33, 0x33, 0x33, 0x33, 0x33, 0x33, 0x3f, 0x00],
    'V': [0x33, 0x33, 0x33, 0x33, 0x33, 0x1e, 0x0c, 0x00],
    'W': [0x63, 0x63, 0x63, 0x6b, 0x7f, 0x77, 0x63, 0x00],
    'X': [0x63, 0x63, 0x36, 0x1c, 0x1c, 0x36, 0x63, 0x00],
    'Y': [0x33, 0x33, 0x33, 0x1e, 0x0c, 0x0c, 0x1e, 0x00],
    'Z': [0x7f, 0x63, 0x31, 0x18, 0x4c, 0x66, 0x7f, 0x00],
    '[': [0x1e, 0x06, 0x06, 0x06, 0x06, 0x06, 0x1e, 0x00],
    '\\': [0x03, 0x06, 0x0c, 0x18, 0x30, 0x60, 0x40, 0x00],
    ']': [0x1e, 0x18, 0x18, 0x18, 0x18, 0x18, 0x1e, 0x00],
    '^': [0x08, 0x1c, 0x36, 0x63, 0x00, 0x00, 0x00, 0x00],
    '_': [0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff],
    '`': [0x0c, 0x0c, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00],
    'a': [0x00, 0x00, 0x1e, 0x30, 0x3e, 0x33, 0x6e, 0x00],
    'b': [0x07, 0x06, 0x06, 0x3e, 0x66, 0x66, 0x3b, 0x00],
    'c': [0x00, 0x00, 0x1e, 0x33, 0x03, 0x33, 0x1e, 0x00],
    'd': [0x38, 0x30, 0x30, 0x3e, 0x33, 0x33, 0x6e, 0x00],
    'e': [0x00, 0x00, 0x1e, 0x33, 0x3f, 0x03, 0x1e, 0x00],
    'f': [0x1c, 0x36, 0x06, 0x0f, 0x06, 0x06, 0x0f, 0x00],
    'g': [0x00, 0x00, 0x6e, 0x33, 0x33, 0x3e, 0x30, 0x1f],
    'h': [0x07, 0x06, 0x36, 0x6e, 0x66, 0x66, 0x67, 0x00],
    'i': [0x0c, 0x00, 0x0e, 0x0c, 0x0c, 0x0c, 0x1e, 0x00],
    'j': [0x30, 0x00, 0x30, 0x30, 0x30, 0x33, 0x33, 0x1e],
    'k': [0x07, 0x06, 0x66, 0x36, 0x1e, 0x36, 0x67, 0x00],
    'l': [0x0e, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x1e, 0x00],
    'm': [0x00, 0x00, 0x33, 0x7f, 0x7f, 0x6b, 0x63, 0x00],
    'n': [0x00, 0x00, 0x1f, 0x33, 0x33, 0x33, 0x33, 0x00],
    'o': [0x00, 0x00, 0x1e, 0x33, 0x33, 0x33, 0x1e, 0x00],
    'p': [0x00, 0x00, 0x3b, 0x66, 0x66, 0x3e, 0x06, 0x0f],
    'q': [0x00, 0x00, 0x6e, 0x33, 0x33, 0x3e, 0x30, 0x78],
    'r': [0x00, 0x00, 0x3b, 0x6e, 0x66, 0x06, 0x0f, 0x00],
    's': [0x00, 0x00, 0x3e, 0x03, 0x1e, 0x30, 0x1f, 0x00],
    't': [0x08, 0x0c, 0x3e, 0x0c, 0x0c, 0x2c, 0x18, 0x00],
    'u': [0x00, 0x00, 0x33, 0x33, 0x33, 0x33, 0x6e, 0x00],
    'v': [0x00, 0x00, 0x33, 0x33, 0x33, 0x1e, 0x0c, 0x00],
    'w': [0x00, 0x00, 0x63, 0x6b, 0x7f, 0x7f, 0x36, 0x00],
    'x': [0x00, 0x00, 0x63, 0x36, 0x1c, 0x36, 0x63, 0x00],
    'y': [0x00, 0x00, 0x33, 0x33, 0x33, 0x3e, 0x30, 0x1f],
    'z': [0x00, 0x00, 0x3f, 0x19, 0x0c, 0x26, 0x3f, 0x00],
    '{': [0x38, 0x0c, 0x0c, 0x07, 0x0c, 0x0c, 0x38, 0x00],
    '|': [0x18, 0x18, 0x18, 0x00, 0x18, 0x18, 0x18, 0x00],
    '}': [0x07, 0x0c, 0x0c, 0x38, 0x0c, 0x0c, 0x07, 0x00],
    '~': [0x6e, 0x3b, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00],
    '·': [0x00, 0x00, 0x00, 0x18, 0x18, 0x00, 0x00, 0x00], // custom middle-dot separator
};

const BLANK = GLYPHS[' '];

/** 8 row-bytes for a character; falls back to a blank cell for anything unmapped. */
export function glyphFor(ch: string): number[] {
    return GLYPHS[ch] ?? BLANK;
}

/** Whether a character has a real glyph (used for width estimation / fitting). */
export function hasGlyph(ch: string): boolean {
    return ch in GLYPHS;
}