Language dropdown with pixel flags in settings, title and login
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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// Pixel flags for the language dropdown: 12 x 9 pixels each, one letter per pixel
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// (see PALETTE). Simplified renditions; the coats of arms are a few pixels only.
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use macroquad::prelude::*;
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pub const FLAG_W: usize = 12;
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pub const FLAG_H: usize = 9;
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fn palette(c: char) -> Option<Color> {
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let rgb = |r: u8, g: u8, b: u8| Some(Color::from_rgba(r, g, b, 255));
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match c {
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'R' => rgb(206, 32, 41), // red
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'W' => rgb(240, 240, 240), // white
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'B' => rgb(0, 57, 166), // blue
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'N' => rgb(1, 33, 105), // navy (Union Jack)
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'Y' => rgb(255, 204, 0), // yellow
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'G' => rgb(0, 146, 70), // green
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'D' => rgb(0, 102, 0), // dark green (Portugal)
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'K' => rgb(16, 16, 16), // black
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'S' => rgb(0, 106, 167), // Swedish blue
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'F' => rgb(0, 47, 108), // Finnish blue
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'L' => rgb(13, 94, 175), // Greek blue
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'O' => rgb(170, 21, 27), // dark red (coats of arms)
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_ => None,
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}
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}
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// three horizontal stripes of three rows each
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macro_rules! tricolour {
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($a:literal, $b:literal, $c:literal) => {
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[$a, $a, $a, $b, $b, $b, $c, $c, $c]
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};
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}
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// the flag of a language code
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pub fn flag(code: &str) -> Option<[&'static str; FLAG_H]> {
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Some(match code {
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"de" => tricolour!("KKKKKKKKKKKK", "RRRRRRRRRRRR", "YYYYYYYYYYYY"),
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"nl" => tricolour!("RRRRRRRRRRRR", "WWWWWWWWWWWW", "BBBBBBBBBBBB"),
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"ru" => tricolour!("WWWWWWWWWWWW", "BBBBBBBBBBBB", "RRRRRRRRRRRR"),
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"hu" => tricolour!("RRRRRRRRRRRR", "WWWWWWWWWWWW", "GGGGGGGGGGGG"),
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"it" => ["GGGGWWWWRRRR"; FLAG_H],
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"ro" => ["BBBBYYYYRRRR"; FLAG_H],
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"en" => [
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"RWNNWRRWNNWR",
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"WRRWWRRWWRRW",
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"NNWRWRRWRWNN",
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"WWWWWRRWWWWW",
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"RRRRRRRRRRRR",
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"WWWWWRRWWWWW",
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"NNWRWRRWRWNN",
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"WRRWWRRWWRRW",
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"RWNNWRRWNNWR",
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],
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"es" => [
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"RRRRRRRRRRRR",
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"RRRRRRRRRRRR",
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"YYYYYYYYYYYY",
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"YYOOYYYYYYYY",
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"YYOROYYYYYYY",
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"YYOOYYYYYYYY",
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"YYYYYYYYYYYY",
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"RRRRRRRRRRRR",
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"RRRRRRRRRRRR",
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],
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"pt" => [
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"DDDDDRRRRRRR",
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"DDDDDRRRRRRR",
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"DDDDDRRRRRRR",
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"DDDYYYRRRRRR",
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"DDDYRYRRRRRR",
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"DDDYYYRRRRRR",
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"DDDDDRRRRRRR",
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"DDDDDRRRRRRR",
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"DDDDDRRRRRRR",
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],
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"da" => [
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"RRRWWRRRRRRR",
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"RRRWWRRRRRRR",
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"RRRWWRRRRRRR",
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"RRRWWRRRRRRR",
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"WWWWWWWWWWWW",
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"RRRWWRRRRRRR",
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"RRRWWRRRRRRR",
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"RRRWWRRRRRRR",
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"RRRWWRRRRRRR",
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],
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"sv" => [
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"SSSYYSSSSSSS",
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"SSSYYSSSSSSS",
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"SSSYYSSSSSSS",
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"SSSYYSSSSSSS",
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"YYYYYYYYYYYY",
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"SSSYYSSSSSSS",
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"SSSYYSSSSSSS",
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"SSSYYSSSSSSS",
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"SSSYYSSSSSSS",
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],
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"fi" => [
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"WWWFFWWWWWWW",
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"WWWFFWWWWWWW",
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"WWWFFWWWWWWW",
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"FFFFFFFFFFFF",
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"FFFFFFFFFFFF",
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"WWWFFWWWWWWW",
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"WWWFFWWWWWWW",
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"WWWFFWWWWWWW",
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"WWWFFWWWWWWW",
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],
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"no" => [
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"RRRWNWRRRRRR",
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"RRRWNWRRRRRR",
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"RRRWNWRRRRRR",
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"WWWWNWWWWWWW",
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"NNNNNNNNNNNN",
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"WWWWNWWWWWWW",
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"RRRWNWRRRRRR",
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"RRRWNWRRRRRR",
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"RRRWNWRRRRRR",
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],
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"hr" => [
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"RRRRRRRRRRRR",
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"RRRRRRRRRRRR",
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"RRRRRRRRRRRR",
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"WWWWRWRWWWWW",
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"WWWWWRWRWWWW",
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"WWWWRWRWWWWW",
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"BBBBWRWRBBBB",
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"BBBBBWRBBBBB",
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"BBBBBBBBBBBB",
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],
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"sr" => [
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"RRRRRRRRRRRR",
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"RRRYYRRRRRRR",
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"RROWWORRRRRR",
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"BBOWWOBBBBBB",
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"BBOWWOBBBBBB",
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"BBBOOBBBBBBB",
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"WWWWWWWWWWWW",
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"WWWWWWWWWWWW",
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"WWWWWWWWWWWW",
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],
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"sk" => [
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"WWWWWWWWWWWW",
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"WWWWWWWWWWWW",
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"WWRRRRRWWWWW",
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"BBRRWRRBBBBB",
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"BBRWWWRBBBBB",
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"BBRRWRRBBBBB",
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"RRRBBBRRRRRR",
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"RRRRBRRRRRRR",
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"RRRRRRRRRRRR",
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],
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"cs" => [
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"BWWWWWWWWWWW",
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"BBWWWWWWWWWW",
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"BBBWWWWWWWWW",
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"BBBBWWWWWWWW",
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"BBBBBRRRRRRR",
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"BBBBRRRRRRRR",
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"BBBRRRRRRRRR",
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"BBRRRRRRRRRR",
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"BRRRRRRRRRRR",
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],
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"el" => [
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"LLWLLWWWWWWW",
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"LLWLLLLLLLLL",
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"WWWWWWWWWWWW",
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"LLWLLLLLLLLL",
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"LLWLLWWWWWWW",
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"LLLLLLLLLLLL",
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"WWWWWWWWWWWW",
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"LLLLLLLLLLLL",
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"WWWWWWWWWWWW",
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],
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_ => return None,
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})
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}
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// draws a flag with its top-left corner at (x, y), px screen pixels per flag pixel
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pub fn draw_flag(code: &str, x: f32, y: f32, px: f32) {
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let rows = flag(code).unwrap_or(["WWWWWWWWWWWW"; FLAG_H]);
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for (r, row) in rows.iter().enumerate() {
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for (k, ch) in row.chars().enumerate() {
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if let Some(c) = palette(ch) {
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draw_rectangle(x + k as f32 * px, y + r as f32 * px, px, px, c);
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}
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}
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}
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draw_rectangle_lines(x - 1.0, y - 1.0, FLAG_W as f32 * px + 2.0, FLAG_H as f32 * px + 2.0, 1.0, Color::new(0.0, 0.0, 0.0, 0.6));
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn every_language_has_a_complete_flag() {
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for code in ["de", "en", "es", "pt", "nl", "da", "no", "sv", "fi", "ru", "hr", "hu", "sr", "ro", "sk", "cs", "it", "el"] {
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let f = flag(code).unwrap_or_else(|| panic!("{} has a flag", code));
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for row in f.iter() {
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assert_eq!(row.chars().count(), FLAG_W, "{}: {}", code, row);
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assert!(row.chars().all(|c| palette(c).is_some()), "{}: {}", code, row);
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}
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}
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}
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}
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