{"id":12791,"date":"2026-10-02T01:00:00","date_gmt":"2026-10-01T16:00:00","guid":{"rendered":"https:\/\/www.webcyou.com\/?p=12791"},"modified":"2026-09-25T01:03:38","modified_gmt":"2026-09-24T16:03:38","slug":"%e3%80%90r-chr%e3%80%91rust-egui-%e3%81%a7%e3%83%95%e3%82%a1%e3%83%9f%e3%82%b3%e3%83%b3%e7%94%a8%e3%82%b9%e3%83%97%e3%83%a9%e3%82%a4%e3%83%88%e3%82%a8%e3%83%87%e3%82%a3%e3%82%bf%e3%82%92%e4%bd%9c-6","status":"publish","type":"post","link":"https:\/\/www.webcyou.com\/?p=12791","title":{"rendered":"\u3010R-CHR\u3011Rust + egui \u3067\u30d5\u30a1\u30df\u30b3\u30f3\u7528\u30b9\u30d7\u30e9\u30a4\u30c8\u30a8\u30c7\u30a3\u30bf\u3092\u4f5c\u3063\u305f\u8a71 \u305d\u306e6 PNG \u30a4\u30f3\u30dd\u30fc\u30c8\u3068 3 \u3064\u306e\u30de\u30c3\u30d4\u30f3\u30b0\u6226\u7565"},"content":{"rendered":"\n

\u3069\u3082\u3067\u3059\u3002<\/p>\n

\u524d\u56de\u307e\u3067\u3067\u3001\u30a8\u30c7\u30a3\u30bf\u306e\u4e2d\u3067\u30c9\u30c3\u30c8\u3092\u63cf\u304f\u6a5f\u80fd\u306f\u4e00\u901a\u308a\u63c3\u3044\u307e\u3057\u305f\u3002\u305f\u3060\u3001\u6b63\u76f4\u306a\u3068\u3053\u308d\u3001\u672c\u683c\u7684\u306b\u30c9\u30c3\u30c8\u7d75\u3092\u63cf\u304f\u306a\u3089 Aseprite \u306e\u3088\u3046\u306a\u5c02\u7528\u30c4\u30fc\u30eb\u306e\u307b\u3046\u304c\u5727\u5012\u7684\u306b\u63cf\u304d\u3084\u3059\u3044\u308f\u3051\u3067\u3057\u3066\u3002<\/p>\n

\u3060\u3063\u305f\u3089\u300c\u5916\u3067\u63cf\u3044\u305f PNG \u3092\u305d\u306e\u307e\u307e CHR \u306b\u653e\u308a\u8fbc\u3081\u308b<\/strong>\u300d\u3088\u3046\u306b\u3059\u308c\u3070\u826f\u3044\u306e\u3067\u306f\u3001\u3068\u3002YY-CHR \u306b\u3082\u300cPaste Image\u300d\u306f\u3042\u308b\u306e\u3067\u3059\u304c\u3001\u5bfe\u5fdc\u3057\u3066\u3044\u308b\u306e\u304c 8bpp \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u30ab\u30e9\u30fc\u306e BMP \/ PNG \u3060\u3051\u3067\u3001\u3053\u3053\u3067\u3044\u3064\u3082\u4e00\u624b\u9593\u304b\u304b\u3063\u3066\u3044\u305f\u3093\u3067\u3059\u3088\u306d\u3002<\/p>\n

\u3068\u3044\u3046\u3053\u3068\u3067\u3001\u4eca\u56de\u306f R-CHR \u306e PNG \u30a4\u30f3\u30dd\u30fc\u30c8<\/strong>\u306e\u5b9f\u88c5\u3001\u7279\u306b\u300cPNG \u306e\u8272\u3092\u3069\u3046\u3084\u3063\u3066 0\u301c3 \u306e\u8272\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306b\u843d\u3068\u3059\u304b<\/strong>\u300d\u3068\u3044\u3046 3 \u3064\u306e\u30de\u30c3\u30d4\u30f3\u30b0\u6226\u7565<\/strong>\u3068\u900f\u904e\u51e6\u7406\u3092\u307e\u3068\u3081\u305f\u5f62\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n

\u9023\u8f09\u306e\u76ee\u6b21<\/h4>\n
    \n
  1. \u6982\u8981\u3068\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3<\/li>\n
  2. NES \u306e CHR \u30d5\u30a9\u30fc\u30de\u30c3\u30c8\uff082BPP\uff09\u3068 iNES \u30d8\u30c3\u30c0\u3001\u30d1\u30ec\u30c3\u30c8<\/li>\n
  3. egui \u3067\u7d44\u3080 3 \u30d1\u30cd\u30eb UI \u3068\u30d0\u30f3\u30af\u30d3\u30e5\u30fc<\/li>\n
  4. \u30c9\u30c3\u30c8\u30a8\u30c7\u30a3\u30bf\u306e\u57fa\u790e\u3068\u30a2\u30f3\u30c9\u30a5\u8a2d\u8a08<\/li>\n
  5. \u56f3\u5f62\u30c4\u30fc\u30eb\uff08Bresenham\u30fb\u6955\u5186\u30fb\u5857\u308a\u3064\u3076\u3057\u30fb\u30b9\u30bf\u30f3\u30d7\uff09<\/li>\n
  6. PNG \u30a4\u30f3\u30dd\u30fc\u30c8\u3068 3 \u3064\u306e\u30de\u30c3\u30d4\u30f3\u30b0\u6226\u7565\uff08\u3053\u306e\u8a18\u4e8b\uff09<\/strong><\/li>\n
  7. macOS \u30cd\u30a4\u30c6\u30a3\u30d6\u30e1\u30cb\u30e5\u30fc\u30fb\u591a\u8a00\u8a9e\u5bfe\u5fdc\u30fbGitHub Actions \u3067\u306e\u30ea\u30ea\u30fc\u30b9<\/li>\n<\/ol>\n

    \u5bfe\u5fdc\u30d5\u30a9\u30fc\u30de\u30c3\u30c8<\/h4>\n

    R-CHR \u304c\u53d7\u3051\u4ed8\u3051\u308b PNG \u306f\u3053\u308c\u3060\u3051\u3042\u308a\u307e\u3059\u3002<\/p>\n

      \n
    • \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u30ab\u30e9\u30fc PNG\uff081-bit \/ 2-bit \/ 4-bit \/ 8-bit\uff09<\/li>\n
    • \u30d5\u30eb\u30ab\u30e9\u30fc PNG\uff08RGB \/ RGBA\uff09<\/li>\n
    • \u900f\u904e\u4ed8\u304d PNG\uff08tRNS \u30c1\u30e3\u30f3\u30af \/ \u30a2\u30eb\u30d5\u30a1\u30c1\u30e3\u30f3\u30cd\u30eb\uff09<\/li>\n<\/ul>\n

      \u52a0\u3048\u3066 BMP \u3082\u8aad\u3081\u307e\u3059\uff08\u3053\u3061\u3089\u306f RGB \u8fd1\u4f3c\u306e\u307f\uff09\u3002<\/p>\n

      \u300c\u306a\u3093\u3067\u3082\u653e\u308a\u8fbc\u3081\u308b\u300d\u306e\u304c\u76ee\u6a19\u3060\u3063\u305f\u306e\u3067\u3001\u30d5\u30eb\u30ab\u30e9\u30fc\u306e PNG \u3084\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8\u3067\u3082\u3001\u8fd1\u4f3c\u306b\u306f\u306a\u308a\u307e\u3059\u304c\u3068\u308a\u3042\u3048\u305a CHR \u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n

      \u5168\u4f53\u306e\u6d41\u308c<\/h4>\n
      File \u2192 Import PNG\u2026 \/ \u30c9\u30e9\u30c3\u30b0 & \u30c9\u30ed\u30c3\u30d7\n  \u2193\n\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u307f \u2192 import_png(bytes, DAT, \u30bb\u30c3\u30c8, \u30de\u30b9\u30bf\u30fc, None)   \u2026 \u6226\u7565\u306f\u81ea\u52d5\u9078\u629e\n  \u2193\nPngImportDialog \u3092\u958b\u304f\uff08\u30d7\u30ec\u30d3\u30e5\u30fc\u30c6\u30af\u30b9\u30c1\u30e3\u751f\u6210\uff09\n  \u2193\n\u30e9\u30b8\u30aa\u30dc\u30bf\u30f3\u3067\u6226\u7565\u3092\u5909\u66f4 \u2192 import_png(..., Some(strategy)) \u3067\u518d\u5909\u63db \u2192 \u30d7\u30ec\u30d3\u30e5\u30fc\u66f4\u65b0\n  \u2193\n\u300c\u8cbc\u308a\u4ed8\u3051\u300d\u2192 apply_png_import()\n  \u2193 \u5f71\u97ff\u30bf\u30a4\u30eb\u5168\u90e8\u3092\u30b9\u30ca\u30c3\u30d7\u30b7\u30e7\u30c3\u30c8 \u2192 push_undo_batch()\n  \u2193 write_to_chr() \u3067 encode_dot() \u3092 1 \u30c9\u30c3\u30c8\u305a\u3064<\/pre>\n
      \u5909\u63db\u30ed\u30b8\u30c3\u30af\u306f io\/png.rs<\/code>\u3001\u30c0\u30a4\u30a2\u30ed\u30b0 UI \u306f editor\/png_import.rs<\/code> \u306b\u5206\u304b\u308c\u3066\u3044\u307e\u3059\u3002io\/png.rs<\/code> \u306f egui \u306b\u4f9d\u5b58\u3057\u3066\u3044\u306a\u3044\u306e\u3067\u3001\u5358\u4f53\u3067\u30c6\u30b9\u30c8\u3057\u305f\u308a CLI \u30c4\u30fc\u30eb\u306b\u6d41\u7528\u3057\u305f\u308a\u3082\u3067\u304d\u308b\u5f62\u3067\u3059\u3002<\/p>\n
      \u5909\u63db\u7d50\u679c\u306f\u3053\u306e\u69cb\u9020\u4f53\u306b\u5165\u308a\u307e\u3059\u3002<\/p>\n
      pub struct PngImportResult {\n    \/\/\/ \u753b\u50cf\u5e45\uff08\u30d4\u30af\u30bb\u30eb\uff09\n    pub width: usize,\n    \/\/\/ \u753b\u50cf\u9ad8\u3055\uff08\u30d4\u30af\u30bb\u30eb\uff09\n    pub height: usize,\n    \/\/\/ CHR \u30ab\u30e9\u30fc\u30a4\u30f3\u30c7\u30c3\u30af\u30b9 [y][x] = 0\u301c3\n    pub pixels: Vec<vec>,\n    \/\/\/ \u5b9f\u969b\u306b\u4f7f\u7528\u3057\u305f\u30de\u30c3\u30d4\u30f3\u30b0\u6226\u7565\n    pub strategy: MappingStrategy,\n    \/\/\/ \u8b66\u544a\u30ea\u30b9\u30c8\uff08\u8a00\u8a9e\u975e\u4f9d\u5b58\uff09\n    pub warnings: Vec,\n}<\/vec<\/pre>\n
      \u8981\u306f\u300c\u753b\u50cf\u3068\u540c\u3058\u30b5\u30a4\u30ba\u306e 0\u301c3 \u306e 2 \u6b21\u5143\u914d\u5217\u300d\u3067\u3059\u3002\u3053\u3053\u307e\u3067\u843d\u3068\u305b\u308c\u3070\u3001\u3042\u3068\u306f\u524d\u56de\u307e\u3067\u3068\u540c\u3058 encode_dot()<\/code> \u3067\u66f8\u304f\u3060\u3051\u3002<\/p>\n
      PNG \u306e\u30e1\u30bf\u60c5\u5831\u3092\u8aad\u3080\uff1apng \u30af\u30ec\u30fc\u30c8<\/h4>\n
      \u307e\u305a PNG \u304b\u3089\u5fc5\u8981\u306a\u60c5\u5831\u3092\u53d6\u308a\u51fa\u3057\u307e\u3059\u3002\u3053\u3053\u3067\u306f image<\/code> \u30af\u30ec\u30fc\u30c8\u3067\u306f\u306a\u304f\u3001\u3088\u308a\u4f4e\u30ec\u30d9\u30eb\u306a png<\/code> \u30af\u30ec\u30fc\u30c8<\/strong>\u3092\u4f7f\u3063\u3066\u3044\u307e\u3059\u3002\u7406\u7531\u306f\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u30ab\u30e9\u30fc PNG \u306e PLTE\uff08\u30d1\u30ec\u30c3\u30c8\uff09\u30c1\u30e3\u30f3\u30af<\/strong>\u3068 tRNS\uff08\u900f\u904e\uff09\u30c1\u30e3\u30f3\u30af<\/strong>\u306e\u4e2d\u8eab\u3092\u76f4\u63a5\u898b\u305f\u3044\u304b\u3089\u3067\u3059\u3002image<\/code> \u30af\u30ec\u30fc\u30c8\u306f\u4fbf\u5229\u306a\u306e\u3067\u3059\u304c\u3001\u8aad\u307f\u8fbc\u3093\u3060\u6642\u70b9\u3067 RGBA \u306b\u5c55\u958b\u3055\u308c\u3066\u3057\u307e\u3063\u3066\u3001\u5143\u306e\u30d1\u30ec\u30c3\u30c8\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u5206\u304b\u3089\u306a\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n
      fn read_png_meta(data: &[u8]) -> Result<pngmeta, string=\"\"> {\n    use png::{BitDepth, ColorType};\n\n    let decoder = png::Decoder::new(std::io::Cursor::new(data));\n    let mut reader = decoder.read_info().map_err(|e| format!(\"PNG \u89e3\u6790\u5931\u6557: {e}\"))?;\n    let mut buf = vec![0u8; reader.output_buffer_size()];\n    let info = reader.next_frame(&mut buf).map_err(|e| format!(\"PNG \u30d5\u30ec\u30fc\u30e0\u8aad\u307f\u8fbc\u307f\u5931\u6557: {e}\"))?;\n\n    let is_indexed = matches!(info.color_type, ColorType::Indexed);\n    let palette = reader\n        .info()\n        .palette\n        .as_deref()\n        .unwrap_or(&[])\n        .chunks_exact(3)\n        .map(|c| , c[1], c[2]])\n        .collect();\n    \/\/ tRNS \u30c1\u30e3\u30f3\u30af: \u30a4\u30f3\u30c7\u30c3\u30af\u30b9 PNG \u3067\u306f\u5404\u30d1\u30ec\u30c3\u30c8\u30a8\u30f3\u30c8\u30ea\u306e\u30a2\u30eb\u30d5\u30a1\u5024\n    let transparency = reader\n        .info()\n        .trns\n        .as_deref()\n        .unwrap_or(&[])\n        .to_vec();\n    \/\/ ...\n}<\/pngmeta,><\/pre>\n
      \u30d3\u30c3\u30c8\u6df1\u5ea6\u306e\u5c55\u958b<\/h5>\n
      \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u30ab\u30e9\u30fc PNG \u306f\u3001\u30d3\u30c3\u30c8\u6df1\u5ea6\u304c 8 \u672a\u6e80\u3060\u3068 1 \u30d0\u30a4\u30c8\u306b\u8907\u6570\u30d4\u30af\u30bb\u30eb\u304c\u8a70\u307e\u3063\u3066\u3044\u307e\u3059<\/strong>\u30024-bit \u306a\u3089 1 \u30d0\u30a4\u30c8\u306b 2 \u30d4\u30af\u30bb\u30eb\u30012-bit \u306a\u3089 4 \u30d4\u30af\u30bb\u30eb\u30011-bit \u306a\u3089 8 \u30d4\u30af\u30bb\u30eb\u3002<\/p>\n
      \u5f8c\u6bb5\u306e\u30b3\u30fc\u30c9\u3067 [y * w + x]<\/code> \u3068\u7d20\u76f4\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u3088\u3046\u306b\u3001\u3053\u3053\u3067 1 \u30d0\u30a4\u30c8 = 1 \u30d4\u30af\u30bb\u30eb<\/strong>\u306b\u5c55\u958b\u3057\u3066\u304a\u304d\u307e\u3059\u30022-bit \u306e\u5834\u5408\u306f\u3053\u3093\u306a\u611f\u3058\u3067\u3059\u3002<\/p>\n
      BitDepth::Two => {\n    let mut pixels = Vec::with_capacity(w * h);\n    for y in 0..h {\n        let row = &raw[y * info.line_size..];\n        for x in 0..w {\n            let byte = row[x \/ 4];\n            let shift = (3 - (x % 4)) * 2;\n            pixels.push((byte >> shift) & 0x03);\n        }\n    }\n    pixels\n}<\/pre>\n
      \u300c1 \u30d0\u30a4\u30c8\u306b 4 \u30d4\u30af\u30bb\u30eb\u3001\u5de6\u306e\u30d4\u30af\u30bb\u30eb\u304c\u4e0a\u4f4d\u30d3\u30c3\u30c8<\/strong>\u300d\u3068\u3044\u3046 PNG \u306e\u4ed5\u69d8\u306b\u5f93\u3063\u3066\u3001x \/ 4<\/code> \u3067\u30d0\u30a4\u30c8\u3001(3 - x % 4) * 2<\/code> \u3067\u30b7\u30d5\u30c8\u91cf\u3092\u6c42\u3081\u3066\u30de\u30b9\u30af\u3057\u3066\u3044\u307e\u3059\u3002\u884c\u306e\u5148\u982d\u306f info.line_size<\/code> \u5358\u4f4d\u3067\u63c3\u3063\u3066\u3044\u308b\u306e\u3067\u3001\u884c\u3054\u3068\u306b row<\/code> \u3092\u5207\u308a\u76f4\u3057\u3066\u3044\u308b\u306e\u3082\u5730\u5473\u306b\u5927\u4e8b\u306a\u3068\u3053\u308d\u3067\u3059\uff08\u884c\u672b\u306e\u30d1\u30c7\u30a3\u30f3\u30b0\u3092\u8e0f\u307e\u306a\u3044\u3088\u3046\u306b\uff09\u3002<\/p>\n
      \u3061\u306a\u307f\u306b 2-bit \u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u30ab\u30e9\u30fc PNG \u306f\u3001\u30d5\u30a1\u30df\u30b3\u30f3\u306e 4 \u8272\u3068\u3074\u3063\u305f\u308a\u5bfe\u5fdc\u3059\u308b\u306e\u3067\u3001Aseprite \u304b\u3089\u306e\u66f8\u304d\u51fa\u3057\u3067\u306f\u5272\u3068\u3088\u304f\u51fa\u3066\u304f\u308b\u5f62\u5f0f\u3067\u3059\u3002<\/p>\n
      3 \u3064\u306e\u30de\u30c3\u30d4\u30f3\u30b0\u6226\u7565<\/h4>\n
      \u3055\u3066\u672c\u984c\u3002PNG \u306e\u30d4\u30af\u30bb\u30eb\u3092 0\u301c3 \u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306b\u3059\u308b\u65b9\u6cd5\u3068\u3057\u3066\u30013 \u3064\u306e\u6226\u7565\u3092\u7528\u610f\u3057\u307e\u3057\u305f\u3002<\/p>\n
      \/\/\/ \u30d4\u30af\u30bb\u30eb\u3092 CHR \u30ab\u30e9\u30fc\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\uff080\u301c3\uff09\u3078\u5909\u63db\u3059\u308b\u6226\u7565\n#[derive(Clone, Copy, PartialEq, Eq)]\npub enum MappingStrategy {\n    \/\/\/ \u30a4\u30f3\u30c7\u30c3\u30af\u30b9 PNG \u306e\u30d4\u30af\u30bb\u30eb\u5024\u3092 mod 4 \u3059\u308b\uff08\u30d1\u30ec\u30c3\u30c8\u5148\u982d 4 \u8272 = CHR 0\u301c3\uff09\n    IndexDirect,\n    \/\/\/ \u30a4\u30f3\u30c7\u30c3\u30af\u30b9 PNG \u306e PLTE \u3092 NES \u30de\u30b9\u30bf\u30fc\u30d1\u30ec\u30c3\u30c8\u306b\u7167\u5408\u3057 DAT \u30bb\u30c3\u30c8\u306e 0\u301c3 \u306b\u5909\u63db\n    PaletteMatch,\n    \/\/\/ \u30d5\u30eb\u30ab\u30e9\u30fc PNG \u306e\u5404\u30d4\u30af\u30bb\u30eb\u3092 DAT \u30d1\u30ec\u30c3\u30c8\u30bb\u30c3\u30c8 4 \u8272\u306b RGB \u8fd1\u4f3c\u30de\u30c3\u30d4\u30f3\u30b0\n    RgbApprox,\n}<\/pre>\n
      \u3069\u308c\u3092\u4f7f\u3046\u304b\u306f\u3001\u30d5\u30a1\u30a4\u30eb\u306e\u7a2e\u985e\u304b\u3089\u81ea\u52d5\u3067\u9078\u3070\u308c\u307e\u3059<\/strong>\u3002\u30c0\u30a4\u30a2\u30ed\u30b0\u306e\u30e9\u30b8\u30aa\u30dc\u30bf\u30f3\u3067\u624b\u52d5\u3067\u5909\u3048\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n
      \/\/ \u6226\u7565\u3092\u81ea\u52d5\u9078\u629e\uff08\u30d2\u30f3\u30c8\u304c\u3042\u308c\u3070\u305d\u308c\u3092\u4f7f\u3046\uff09\nlet strategy = match strategy_hint {\n    Some(s) => s,\n    None => {\n        if meta.is_indexed && !meta.palette.is_empty() {\n            MappingStrategy::PaletteMatch\n        } else if meta.is_indexed {\n            MappingStrategy::IndexDirect\n        } else {\n            MappingStrategy::RgbApprox\n        }\n    }\n};<\/pre>\n\n\n\n\n\n\n\n
      \u6761\u4ef6<\/th>\n\u81ea\u52d5\u9078\u629e\u3055\u308c\u308b\u6226\u7565<\/th>\n<\/tr>\n<\/thead>\n
      \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u30ab\u30e9\u30fc + PLTE \u3042\u308a<\/td>\n\u30d1\u30ec\u30c3\u30c8\u7167\u5408\uff08Palette Match\uff09<\/td>\n<\/tr>\n
      \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u30ab\u30e9\u30fc + PLTE \u306a\u3057<\/td>\n\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u76f4\u63a5\uff08Index Direct\uff09<\/td>\n<\/tr>\n
      \u30d5\u30eb\u30ab\u30e9\u30fc\uff08RGB \/ RGBA\uff09<\/td>\nRGB \u8fd1\u4f3c\uff08RGB Approx\uff09<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
      \u8272\u306e\u8ddd\u96e2<\/h5>\n
      3 \u3064\u3068\u3082\u300c\u8fd1\u3044\u8272\u3092\u63a2\u3059\u300d\u51e6\u7406\u304c\u51fa\u3066\u304f\u308b\u306e\u3067\u3001\u8272\u306e\u8ddd\u96e2\u95a2\u6570\u3092\u5171\u901a\u3067\u6301\u3063\u3066\u3044\u307e\u3059\u3002RGB \u7a7a\u9593\u306e\u30e6\u30fc\u30af\u30ea\u30c3\u30c9\u8ddd\u96e2\u306e 2 \u4e57\u3067\u3059\u3002<\/p>\n
      fn color_distance(a: [u8; 3], b: [u8; 3]) -> u32 {\n    let dr = a[0] as i32 - b[0] as i32;\n    let dg = a[1] as i32 - b[1] as i32;\n    let db = a[2] as i32 - b[2] as i32;\n    (dr * dr + dg * dg + db * db) as u32\n}\n\n\/\/\/ RGB \u3092 DAT \u30d1\u30ec\u30c3\u30c8\u30bb\u30c3\u30c8 4 \u8272\u306e\u4e2d\u3067\u6700\u8fd1\u508d\u306e\u8272\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\uff080\u301c3\uff09\u306b\u5909\u63db\nfn nearest_dat_index(rgb: [u8; 3], dat: &DatPalette, set: usize, master: &MasterPalette) -> u8 {\n    (0u8..4)\n        .min_by_key(|&i| color_distance(rgb, dat.color_rgb(set as usize, i as usize, master)))\n        .unwrap_or(0)\n}<\/pre>\n
      \u4eba\u9593\u306e\u77e5\u899a\u306b\u5408\u308f\u305b\u305f\u8272\u5dee\uff08CIE \u306e \u0394E \u3068\u304b\uff09\u3092\u4f7f\u3046\u624b\u3082\u3042\u308a\u307e\u3059\u304c\u3001\u6bd4\u8f03\u5bfe\u8c61\u304c\u9ad8\u3005 4 \u8272\u3084 64 \u8272\u306a\u306e\u3067\u3001\u5358\u7d14\u306a RGB \u8ddd\u96e2\u3067\u5341\u5206\u5b9f\u7528\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u5e73\u65b9\u6839\u3092\u53d6\u3089\u306a\u3044\u306e\u306f\u6bd4\u8f03\u306b\u3057\u304b\u4f7f\u308f\u306a\u3044\u304b\u3089\u3067\u3059\u306d\u3002<\/p>\n
      \u6226\u7565 1\uff1a\u30d1\u30ec\u30c3\u30c8\u7167\u5408\uff08Palette Match\uff09<\/h5>\n
      Aseprite \u3068\u306e\u9023\u643a\u3092\u60f3\u5b9a\u3057\u305f\u6226\u7565\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n
      PLTE[i] \u306e RGB\n  \u2192 NES \u30de\u30b9\u30bf\u30fc\u30d1\u30ec\u30c3\u30c8 64 \u8272\u306e\u4e2d\u3067\u6700\u8fd1\u508d\u3092\u63a2\u3059\n  \u2192 \u305d\u306e\u8272\u306b\u4e00\u756a\u8fd1\u3044\u3001\u73fe\u5728\u306e DAT \u30d1\u30ec\u30c3\u30c8\u30bb\u30c3\u30c8 4 \u8272\u306e\u4e2d\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u9078\u3076\n  \u2192 CHR \u30a4\u30f3\u30c7\u30c3\u30af\u30b9 0\u301c3<\/pre>\n
      \u30dd\u30a4\u30f3\u30c8\u306f\u3001\u5909\u63db\u3092\u30d4\u30af\u30bb\u30eb\u3054\u3068\u3067\u306f\u306a\u304f PLTE \u306e\u30a8\u30f3\u30c8\u30ea\u3054\u3068<\/strong>\u306b\u3084\u3063\u3066\u3044\u308b\u3053\u3068\u3067\u3059\u3002PLTE \u304c 16 \u8272\u306a\u3089 16 \u56de\u3060\u3051\u6700\u8fd1\u508d\u63a2\u7d22\u3092\u3057\u3066\u300cPLTE \u30a4\u30f3\u30c7\u30c3\u30af\u30b9 \u2192 CHR \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u300d\u306e\u5bfe\u5fdc\u8868\u3092\u4f5c\u308a\u3001\u3042\u3068\u306f\u30d4\u30af\u30bb\u30eb\u5024\u3067\u305d\u306e\u8868\u3092\u5f15\u304f\u3060\u3051\u3002<\/p>\n
      MappingStrategy::PaletteMatch => {\n    \/\/ ...\n    let plte_len = meta.palette.len();\n    let mut plte_to_chr = vec![0u8; plte_len];\n    let mut unmatched_count = 0usize;\n    let mut transparent_entries = 0usize;\n\n    for (i, &rgb) in meta.palette.iter().enumerate() {\n        if is_transparent_entry(i) {\n            plte_to_chr[i] = 0; \/\/ \u900f\u660e \u2192 CHR 0\n            transparent_entries += 1;\n            continue;\n        }\n\n        \/\/ NES \u30de\u30b9\u30bf\u30fc\u30d1\u30ec\u30c3\u30c8\uff0864 \u8272\uff09\u306b\u6700\u8fd1\u508d\u30de\u30c3\u30c1\n        let nes_idx = (0usize..64)\n            .min_by_key(|&j| color_distance(rgb, master.colors[j]))\n            .unwrap_or(0);\n        let nes_rgb = master.colors[nes_idx];\n\n        \/\/ DAT \u30d1\u30ec\u30c3\u30c8\u30bb\u30c3\u30c8\u5185\u3067\u6700\u8fd1\u508d\u306e\u8272\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u63a2\u3059\n        let mut best_chr = 0u8;\n        let mut best_dist = u32::MAX;\n        for c in 0u8..4 {\n            let dat_rgb = dat.color_rgb(palette_set, c as usize, master);\n            let d = color_distance(nes_rgb, dat_rgb);\n            if d < best_dist {\n                best_dist = d;\n                best_chr = c;\n            }\n        }\n        plte_to_chr[i] = best_chr;\n        if best_dist > 0 {\n            unmatched_count += 1;\n        }\n    }\n    \/\/ ...\n    for y in 0..h {\n        for x in 0..w {\n            let idx = meta.raw_pixels[y * w + x] as usize;\n            pixels[y][x] = if idx < plte_len { plte_to_chr[idx] } else { 0 };\n        }\n    }\n}<\/pre>\n
      \u300c\u4e00\u5ea6 NES \u306e 64 \u8272\u306b\u4e38\u3081\u3066\u304b\u3089 DAT \u30bb\u30c3\u30c8\u3068\u6bd4\u8f03\u3059\u308b<\/strong>\u300d\u3068\u3044\u3046 2 \u6bb5\u968e\u306b\u3057\u3066\u3044\u308b\u306e\u306f\u3001Aseprite \u5074\u3067 rchr.pal<\/code> \u306e 64 \u8272\u3092\u30d1\u30ec\u30c3\u30c8\u3068\u3057\u3066\u4f7f\u3063\u3066\u3044\u308b\u60f3\u5b9a\u3060\u304b\u3089\u3067\u3059\u3002\u3053\u306e\u5834\u5408 PLTE \u306e\u8272\u306f NES \u306e 64 \u8272\u306e\u3069\u308c\u304b\u306b\u5b8c\u5168\u4e00\u81f4\u3059\u308b\u306e\u3067\u30011 \u6bb5\u76ee\u3067\u6b63\u78ba\u306a NES \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u53d6\u308c\u30012 \u6bb5\u76ee\u3067\u300c\u4eca\u306e\u30d1\u30ec\u30c3\u30c8\u30bb\u30c3\u30c8\u306b\u305d\u306e\u8272\u304c\u3042\u308b\u304b\u300d\u3092\u898b\u308b<\/strong>\u3001\u3068\u3044\u3046\u6d41\u308c\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
      best_dist > 0<\/code> \u306e\u3068\u304d\u3001\u3064\u307e\u308a\u5b8c\u5168\u4e00\u81f4\u3057\u306a\u304b\u3063\u305f\u30a8\u30f3\u30c8\u30ea\u306f\u6570\u3048\u3066\u304a\u3044\u3066\u3001\u30c0\u30a4\u30a2\u30ed\u30b0\u3067\u300c3 \u8272\u304c\u8fd1\u4f3c\u3055\u308c\u307e\u3057\u305f\u300d\u306e\u3088\u3046\u306a\u8b66\u544a\u3092\u51fa\u3057\u307e\u3059\u3002<\/p>\n
      \u6226\u7565 2\uff1a\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u76f4\u63a5\uff08Index Direct\uff09<\/h5>\n
      \u4e00\u756a\u5358\u7d14\u3067\u3001\u30d4\u30af\u30bb\u30eb\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u5024\u3092 4 \u3067\u5272\u3063\u305f\u4f59\u308a<\/strong>\u3092\u305d\u306e\u307e\u307e CHR \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306b\u3057\u307e\u3059\u3002<\/p>\n
      pixels[y][x] = (idx % 4) as u8;<\/pre>\n
      \u300c\u30d1\u30ec\u30c3\u30c8\u306e 0\u301c3 \u756a\u3092\u610f\u56f3\u7684\u306b CHR \u306e 0\u301c3 \u306b\u5bfe\u5fdc\u3055\u305b\u3066\u63cf\u3044\u3066\u3044\u308b\u300d\u5834\u5408\u5411\u3051\u3067\u3059\u3002PLTE \u304c\u7121\u3044\u30a4\u30f3\u30c7\u30c3\u30af\u30b9 PNG \u3067\u81ea\u52d5\u9078\u629e\u3055\u308c\u307e\u3059\u304c\u3001PLTE \u304c\u3042\u3063\u3066\u3082\u624b\u52d5\u3067\u9078\u3079\u307e\u3059\u3002\u900f\u660e\u30a8\u30f3\u30c8\u30ea\u3092\u9664\u3044\u305f\u6700\u5927\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c 4 \u4ee5\u4e0a\u3060\u3063\u305f\u5834\u5408\u306f\u300c4 \u4ee5\u4e0a\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u3042\u308a\u307e\u3059\u300d\u3068\u8b66\u544a\u3092\u51fa\u3057\u307e\u3059\u3002<\/p>\n
      \u6226\u7565 3\uff1aRGB \u8fd1\u4f3c\uff08RGB Approx\uff09<\/h5>\n
      \u30d5\u30eb\u30ab\u30e9\u30fc PNG \u3084\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8\u7528\u3067\u3059\u3002\u5404\u30d4\u30af\u30bb\u30eb\u306e RGB \u3092\u3001\u73fe\u5728\u306e DAT \u30d1\u30ec\u30c3\u30c8\u30bb\u30c3\u30c8 4 \u8272\u306e\u4e2d\u3067\u4e00\u756a\u8fd1\u3044\u8272\u306b<\/strong>\u30de\u30c3\u30d4\u30f3\u30b0\u3057\u307e\u3059\u3002<\/p>\n
      MappingStrategy::RgbApprox => {\n    \/\/ image \u30af\u30ec\u30fc\u30c8\u3067 RGBA \u306b\u5c55\u958b\uff08\u30a2\u30eb\u30d5\u30a1\u30c1\u30e3\u30f3\u30cd\u30eb\u3092\u4fdd\u6301\u3059\u308b\u305f\u3081\uff09\n    let img = image::load_from_memory(png_data)\n        .map_err(|e| format!(\"Image decode failed: {e}\"))?\n        .into_rgba8();\n    \/\/ ...\n    for y in 0..h {\n        for x in 0..w {\n            let px = img.get_pixel(x as u32, y as u32);\n            \/\/ \u30a2\u30eb\u30d5\u30a1 < 128 \u306f\u900f\u660e\u6271\u3044 \u2192 CHR \u30a4\u30f3\u30c7\u30c3\u30af\u30b9 0\n            if px[3] < 128 {\n                pixels[y][x] = 0;\n                transparent_count += 1;\n                continue;\n            }\n            let rgb = [px[0], px[1], px[2]];\n            let chr_idx = nearest_dat_index(rgb, dat, palette_set, master);\n            let expected_rgb = dat.color_rgb(palette_set, chr_idx as usize, master);\n            if expected_rgb != rgb { approx_count += 1; }\n            pixels[y][x] = chr_idx;\n        }\n    }\n}<\/pre>\n
      \u3053\u3061\u3089\u306f image<\/code> \u30af\u30ec\u30fc\u30c8\u3067 RGBA \u306b\u5c55\u958b\u3057\u3066\u3044\u307e\u3059\u3002\u30a2\u30eb\u30d5\u30a1\u30c1\u30e3\u30f3\u30cd\u30eb\u3092\u305d\u306e\u307e\u307e\u6271\u3044\u305f\u3044\u306e\u3067\u3001\u3053\u3063\u3061\u306e\u307b\u3046\u304c\u697d\u306a\u3093\u3067\u3059\u3088\u306d\u3002\u540c\u3058 PNG \u3092 png<\/code> \u30af\u30ec\u30fc\u30c8\u3068 image<\/code> \u30af\u30ec\u30fc\u30c8\u306e\u4e21\u65b9\u3067\u8aad\u3080\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u304c\u3001\u30b5\u30a4\u30ba\u306e\u6574\u5408\u6027\u3060\u3051\u30c1\u30a7\u30c3\u30af\u3057\u3066\u826f\u3057\u3068\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
      \u5f53\u7136\u306a\u304c\u3089\u518d\u73fe\u5ea6\u306f\u300c\u8fd1\u4f3c\u300d\u3067\u3057\u3066\u3001DAT \u30d1\u30ec\u30c3\u30c8\u304c\u5143\u7d75\u306e\u8272\u306b\u8fd1\u3044\u307b\u3069\u826f\u3044\u7d50\u679c\u306b\u306a\u308a\u307e\u3059\u3002\u9006\u306b\u8a00\u3046\u3068\u3001\u30d1\u30ec\u30c3\u30c8\u30bb\u30c3\u30c8\u3092\u5148\u306b\u5143\u7d75\u306b\u5408\u308f\u305b\u3066\u304a\u3051\u3070\u3001\u30d5\u30eb\u30ab\u30e9\u30fc PNG \u304b\u3089\u3067\u3082\u304b\u306a\u308a\u7dba\u9e97\u306b\u53d6\u308a\u8fbc\u3081\u307e\u3059\u3002<\/p>\n
      \u900f\u904e\u30d4\u30af\u30bb\u30eb\u306f\u30a4\u30f3\u30c7\u30c3\u30af\u30b9 0 \u306b<\/h4>\n
      \u900f\u904e\u306e\u6271\u3044\u306f 3 \u6226\u7565\u3068\u3082\u5171\u901a\u3067\u3001\u900f\u660e\u306a\u30d4\u30af\u30bb\u30eb\u306f CHR \u30a4\u30f3\u30c7\u30c3\u30af\u30b9 0 \u306b\u30de\u30c3\u30d4\u30f3\u30b0<\/strong>\u3057\u307e\u3059\u3002<\/p>\n\n\n\n\n\n\n
      \u5f62\u5f0f<\/th>\n\u900f\u660e\u306e\u5224\u5b9a<\/th>\n<\/tr>\n<\/thead>\n
      \u30a4\u30f3\u30c7\u30c3\u30af\u30b9 PNG\uff08tRNS \u3042\u308a\uff09<\/td>\ntRNS \u3067\u30a2\u30eb\u30d5\u30a1 = 0 \u306e\u30d1\u30ec\u30c3\u30c8\u30a8\u30f3\u30c8\u30ea<\/td>\n<\/tr>\n
      RGBA PNG<\/td>\n\u30a2\u30eb\u30d5\u30a1\u5024 < 128 \u306e\u30d4\u30af\u30bb\u30eb<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
      NES \u3067\u306f\u30a4\u30f3\u30c7\u30c3\u30af\u30b9 0 \u304c\u80cc\u666f\u8272\u3067\u3001\u30b9\u30d7\u30e9\u30a4\u30c8\u306e\u5834\u5408\u306f\u300c\u900f\u660e\u8272\u300d\u3068\u3057\u3066\u6271\u308f\u308c\u307e\u3059\u3002\u306a\u306e\u3067\u3001\u7d75\u3092\u63cf\u304f\u3068\u304d\u306b\u900f\u660e\u306b\u3057\u305f\u90e8\u5206\u304c\u305d\u306e\u307e\u307e\u30b9\u30d7\u30e9\u30a4\u30c8\u306e\u629c\u304d\u306b\u306a\u308b\u3001\u3068\u3044\u3046\u306e\u304c\u81ea\u7136\u306a\u6319\u52d5\u304b\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n
      tRNS \u306e\u5224\u5b9a\u306f\u30af\u30ed\u30fc\u30b8\u30e3\u3067\u5c0f\u3055\u304f\u307e\u3068\u3081\u3066\u3044\u307e\u3059\u3002<\/p>\n
      \/\/ tRNS: \u30d1\u30ec\u30c3\u30c8\u30a8\u30f3\u30c8\u30ea\u306e\u30a2\u30eb\u30d5\u30a1\u5024\uff08\u672a\u8a18\u8f09\u30a8\u30f3\u30c8\u30ea\u306f 255 = \u4e0d\u900f\u660e\uff09\nlet transparency = &meta.transparency;\nlet is_transparent_entry = |idx: usize| -> bool {\n    transparency.get(idx).copied().unwrap_or(255) == 0\n};<\/pre>\n
      tRNS \u30c1\u30e3\u30f3\u30af\u306f\u300cPLTE \u306e\u5148\u982d\u304b\u3089\u9806\u306b\u30a2\u30eb\u30d5\u30a1\u5024\u3092\u4e26\u3079\u305f\u3082\u306e\u300d\u3067\u3001\u9014\u4e2d\u3067\u6253\u3061\u5207\u3063\u3066\u826f\u3044\u4ed5\u69d8\u306a\u306e\u3067\u3001\u8a18\u8f09\u304c\u7121\u3044\u30a8\u30f3\u30c8\u30ea\u306f\u4e0d\u900f\u660e\uff08255\uff09\u3068\u3057\u3066\u6271\u3044\u307e\u3059\u3002<\/p>\n
      \u8b66\u544a\u306f\u8a00\u8a9e\u975e\u4f9d\u5b58\u306e enum \u3067\u6301\u3064<\/h4>\n
      \u30a4\u30f3\u30dd\u30fc\u30c8\u6642\u306e\u8b66\u544a\uff08\u8fd1\u4f3c\u3055\u308c\u305f\u8272\u6570\u3001\u900f\u660e\u30d4\u30af\u30bb\u30eb\u6570\u306a\u3069\uff09\u306f\u3001io\/png.rs<\/code> \u306e\u4e2d\u3067\u6587\u5b57\u5217\u306b\u305b\u305a\u3001enum \u306e\u307e\u307e<\/strong>\u8fd4\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
      \/\/\/ \u30a4\u30f3\u30dd\u30fc\u30c8\u6642\u306b\u767a\u751f\u3057\u305f\u8b66\u544a\uff08\u8a00\u8a9e\u975e\u4f9d\u5b58\u306e\u69cb\u9020\u4f53\uff09\n#[derive(Debug, Clone)]\npub enum PngWarning {\n    \/\/\/ \u900f\u660e\u30d4\u30af\u30bb\u30eb\u304c\u30a4\u30f3\u30c7\u30c3\u30af\u30b9 0 \u306b\u30de\u30c3\u30d4\u30f3\u30b0\u3055\u308c\u305f\uff08px \u6570\uff09\n    TransparentPixels(usize),\n    \/\/\/ \u900f\u660e\u30d1\u30ec\u30c3\u30c8\u30a8\u30f3\u30c8\u30ea\u304c\u30a4\u30f3\u30c7\u30c3\u30af\u30b9 0 \u306b\u30de\u30c3\u30d4\u30f3\u30b0\u3055\u308c\u305f\uff08\u30a8\u30f3\u30c8\u30ea\u6570\uff09\n    TransparentPaletteEntries(usize),\n    \/\/\/ \u30d1\u30ec\u30c3\u30c8\u7167\u5408\u3067\u8fd1\u4f3c\u3055\u308c\u305f\u8272\u6570\n    ApproxColors(usize),\n    \/\/\/ RGB \u8fd1\u4f3c\u3055\u308c\u305f\u30d4\u30af\u30bb\u30eb\u6570\n    ApproxPixels(usize),\n    \/\/\/ IndexDirect \u3067\u6700\u5927\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c 3 \u3092\u8d85\u3048\u305f\n    IndexMaxExceeded(u8),\n}<\/pre>\n
      \u6587\u5b57\u5217\u5316\u306f\u30c0\u30a4\u30a2\u30ed\u30b0\u5074\u3067\u3001\u73fe\u5728\u306e\u8868\u793a\u8a00\u8a9e\u306b\u5408\u308f\u305b\u3066\u884c\u3044\u307e\u3059\u3002<\/p>\n
      for w in &dialog.result.warnings {\n    let msg = match w {\n        PngWarning::TransparentPixels(n)         => lang.fmt_transparent_px(*n),\n        PngWarning::TransparentPaletteEntries(n) => lang.fmt_transparent_pal(*n),\n        PngWarning::ApproxColors(n)              => lang.fmt_approx_colors(*n),\n        PngWarning::ApproxPixels(n)              => lang.fmt_approx_pixels(*n),\n        PngWarning::IndexMaxExceeded(n)          => lang.fmt_idx_warn(*n),\n    };\n    ui.colored_label(egui::Color32::YELLOW, format!(\"⚠ {msg}\"));\n}<\/pre>\n
      \u6700\u521d\u306f Vec<\/code> \u3067\u65e5\u672c\u8a9e\u306e\u6587\u8a00\u3092\u76f4\u63a5\u5165\u308c\u3066\u3044\u305f\u306e\u3067\u3059\u304c\u3001\u5f8c\u304b\u3089\u82f1\u8a9e UI \u3092\u8db3\u3057\u305f\u3068\u304d\u306b\u300cio<\/code> \u5c64\u304c UI \u306e\u8a00\u8a9e\u3092\u77e5\u3063\u3066\u3044\u308b\u300d\u306e\u306f\u304a\u304b\u3057\u3044\u3088\u306a\u3041\u3001\u3068\u306a\u3063\u3066 enum \u306b\u5207\u308a\u66ff\u3048\u305f\u7d4c\u7def\u304c\u3042\u308a\u307e\u3059\u3002\u30c7\u30fc\u30bf\u51e6\u7406\u5c64\u306f\u4e8b\u5b9f\u3060\u3051\u3092\u8fd4\u3057\u3066\u3001\u8868\u73fe\u306f UI \u5c64\u3067\u3001\u3068\u3044\u3046\u3084\u3064\u3067\u3059\u306d\u3002<\/p>\n
      \u30a4\u30f3\u30dd\u30fc\u30c8\u30c0\u30a4\u30a2\u30ed\u30b0<\/h4>\n
      \u30c0\u30a4\u30a2\u30ed\u30b0\u306f egui::Window<\/code> \u3067\u51fa\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
      \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\n\u2502  \u753b\u50cf\u30a4\u30f3\u30dd\u30fc\u30c8                                        \u2502\n\u2502                                                        \u2502\n\u2502  \u30d5\u30a1\u30a4\u30eb: sprite.png  (32\u00d732 px = 4\u00d74 \u30bf\u30a4\u30eb)          \u2502\n\u2502                                                        \u2502\n\u2502  \u30de\u30c3\u30d4\u30f3\u30b0\u6226\u7565:                                       \u2502\n\u2502  \u25cf \u30d1\u30ec\u30c3\u30c8\u7167\u5408 (\u63a8\u5968)  \u25cb \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u76f4\u63a5  \u25cb RGB \u8fd1\u4f3c  \u2502\n\u2502                                                        \u2502\n\u2502  ⚠ 3 \u8272\u304c\u30d1\u30ec\u30c3\u30c8\u306b\u5b8c\u5168\u4e00\u81f4\u305b\u305a\u8fd1\u4f3c\u3055\u308c\u307e\u3057\u305f          \u2502\n\u2502  ⚠ \u900f\u660e\u30d1\u30ec\u30c3\u30c8\u30a8\u30f3\u30c8\u30ea 1 \u8272 \u2192 \u30a4\u30f3\u30c7\u30c3\u30af\u30b9 0 \u306b\u5909\u63db    \u2502\n\u2502                                                        \u2502\n\u2502  \u30d7\u30ec\u30d3\u30e5\u30fc (\u5909\u63db\u5f8c):                                  \u2502\n\u2502  [\u5909\u63db\u5f8c\u306e CHR \u8272\u3067\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3057\u305f\u30d7\u30ec\u30d3\u30e5\u30fc]          \u2502\n\u2502                                                        \u2502\n\u2502  \u8cbc\u308a\u4ed8\u3051\u5148: \u30bf\u30a4\u30eb 0 (0x000000) \u304b\u3089                  \u2502\n\u2502                                                        \u2502\n\u2502         [\u30ad\u30e3\u30f3\u30bb\u30eb]      [\u8cbc\u308a\u4ed8\u3051]                   \u2502\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518<\/pre>\n
      \u30d7\u30ec\u30d3\u30e5\u30fc\u306f\u3001\u5909\u63db\u7d50\u679c\u306e 0\u301c3 \u3092\u73fe\u5728\u306e\u30d1\u30ec\u30c3\u30c8\u3067 RGB \u306b\u3057\u3066\u3001\u30d0\u30f3\u30af\u30d3\u30e5\u30fc\u3068\u540c\u3058\u3088\u3046\u306b ctx.load_texture()<\/code> \u3067\u30c6\u30af\u30b9\u30c1\u30e3\u306b\u3057\u3066\u3044\u307e\u3059\u3002\u30e9\u30b8\u30aa\u30dc\u30bf\u30f3\u3067\u6226\u7565\u3092\u5207\u308a\u66ff\u3048\u308b\u3068 preview_dirty<\/code> \u304c\u7acb\u3063\u3066\u518d\u751f\u6210\u3055\u308c\u308b\u306e\u3067\u3001\u5909\u63db\u7d50\u679c\u3092\u305d\u306e\u5834\u3067\u898b\u6bd4\u3079\u306a\u304c\u3089\u9078\u3079\u307e\u3059<\/strong>\u3002<\/p>\n
      \u30c0\u30a4\u30a2\u30ed\u30b0\u306e\u72b6\u614b\u306f Option<\/code> \u3067\u6301\u3063\u3066\u3044\u3066\u3001Some<\/code> \u306e\u9593\u3060\u3051\u63cf\u753b\u3001\u9589\u3058\u305f\u3089 None<\/code>\u3002\u5373\u6642\u30e2\u30fc\u30c9\u3060\u3068\u30e2\u30fc\u30c0\u30eb\u30c0\u30a4\u30a2\u30ed\u30b0\u3082\u3053\u306e\u7a0b\u5ea6\u3067\u6e08\u307f\u307e\u3059\u3002<\/p>\n
      pub(super) struct PngImportDialog {\n    \/\/\/ \u8aad\u307f\u8fbc\u3093\u3060\u753b\u50cf\u306e\u751f\u30d0\u30a4\u30c8\uff08\u518d\u30de\u30c3\u30d4\u30f3\u30b0\u7528\uff09\n    png_bytes: Vec,\n    \/\/\/ \u30d5\u30a1\u30a4\u30eb\u540d\uff08\u8868\u793a\u7528\uff09\n    file_name: String,\n    \/\/\/ PNG \u306a\u3089 true\u3001BMP \u306a\u3089 false\uff08false \u306e\u5834\u5408\u306f RgbApprox \u306e\u307f\u4f7f\u7528\u53ef\uff09\n    is_png: bool,\n    \/\/\/ \u73fe\u5728\u306e\u30de\u30c3\u30d4\u30f3\u30b0\u6226\u7565\n    strategy: MappingStrategy,\n    \/\/\/ \u73fe\u5728\u306e\u5909\u63db\u7d50\u679c\n    result: PngImportResult,\n    \/\/\/ \u30d7\u30ec\u30d3\u30e5\u30fc\u30c6\u30af\u30b9\u30c1\u30e3\uff08\u5909\u63db\u5f8c CHR \u8272\u3067\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\uff09\n    preview_texture: Option,\n    \/\/\/ \u30d7\u30ec\u30d3\u30e5\u30fc\u30c6\u30af\u30b9\u30c1\u30e3\u304c\u53e4\u304f\u306a\u3063\u3066\u3044\u308b\u304b\n    preview_dirty: bool,\n}<\/pre>\n
      \u5143\u306e PNG \u30d0\u30a4\u30c8\u5217\u3092\u6301\u3063\u3066\u3044\u308b\u306e\u306f\u3001\u6226\u7565\u3092\u5909\u3048\u305f\u3068\u304d\u306b\u518d\u5909\u63db\u3059\u308b\u305f\u3081\u3067\u3059\u3002<\/p>\n
      \u8cbc\u308a\u4ed8\u3051\uff1a\u30a2\u30f3\u30c9\u30a5\u5bfe\u5fdc\u3067 CHR \u306b\u66f8\u304f<\/h4>\n
      \u300c\u8cbc\u308a\u4ed8\u3051\u300d\u3092\u62bc\u3059\u3068\u3001\u30d0\u30f3\u30af\u30d3\u30e5\u30fc\u3067\u9078\u629e\u4e2d\u306e\u30bf\u30a4\u30eb\u3092\u5de6\u4e0a\u3068\u3057\u3066\u66f8\u304d\u8fbc\u307f\u307e\u3059\u3002<\/p>\n
      pub(super) fn apply_png_import(&mut self) {\n    if self.png_import_dialog.is_none() || self.rom.is_none() { return }\n    let top_left_tile = self.selected_tile.unwrap_or(0);\n    let chr_len = self.rom.as_ref().unwrap().chr_data().len();\n\n    \/\/ Undo \u7528: \u5f71\u97ff\u7bc4\u56f2\u306e\u5168\u30bf\u30a4\u30eb\u3092\u4fdd\u5b58\uff08rom \u306e\u501f\u7528\u3092\u5148\u306b\u89e3\u653e\uff09\n    let (tw, th, top_row, top_col) = {\n        let d = self.png_import_dialog.as_ref().unwrap();\n        (d.result.tile_width(), d.result.tile_height(),\n         top_left_tile \/ 16, top_left_tile % 16)\n    };\n    let mut batch: Vec<(usize, [u8; 16])> = Vec::new();\n    for by in 0..th {\n        for bx in 0..tw {\n            let offset = ((top_row + by) * 16 + (top_col + bx)) * 16;\n            if offset + 16 <= chr_len {\n                let saved: [u8; 16] = self.rom.as_ref().unwrap().chr_data()\n                    [offset..offset + 16].try_into().unwrap();\n                batch.push((offset, saved));\n            }\n        }\n    }\n    self.push_undo_batch(batch);\n\n    \/\/ CHR \u3078\u66f8\u304d\u8fbc\u307f\n    {\n        let dialog = self.png_import_dialog.as_ref().unwrap();\n        crate::io::png::write_to_chr(\n            self.rom.as_mut().unwrap().chr_data_mut(),\n            &dialog.result,\n            top_left_tile,\n            16,\n        );\n    }\n\n    self.is_modified = true;\n    self.texture_dirty = true;\n    \/\/ ...\n}<\/pre>\n
      \u753b\u50cf\u304c\u5360\u3081\u308b\u30bf\u30a4\u30eb\u6570\u306f (width + 7) \/ 8<\/code> \u3067\u5207\u308a\u4e0a\u3052\u3002\u305d\u306e\u7bc4\u56f2\u306e\u30bf\u30a4\u30eb\u3092\u5168\u90e8\u30b9\u30ca\u30c3\u30d7\u30b7\u30e7\u30c3\u30c8\u3057\u3066\u304b\u3089\u66f8\u304f\u306e\u3067\u300132\u00d732 \u306e\u753b\u50cf\u3092\u8cbc\u3063\u3066\u3082 Cmd+Z \u4e00\u767a\u3067\u623b\u305b\u307e\u3059\u3002<\/p>\n
      write_to_chr()<\/code> \u306f\u3001\u753b\u50cf\u306e\u5404\u30d4\u30af\u30bb\u30eb\u3092\u30bf\u30a4\u30eb\u30aa\u30d5\u30bb\u30c3\u30c8\u3068\u30bf\u30a4\u30eb\u5185\u5ea7\u6a19\u306b\u5206\u89e3\u3057\u3066 encode_dot()<\/code> \u3092\u547c\u3076\u3060\u3051\u3067\u3059\u3002CHR \u306e\u672b\u5c3e\u3092\u8d85\u3048\u308b\u90e8\u5206\u306f\u30b9\u30ad\u30c3\u30d7\u3057\u307e\u3059\u3002<\/p>\n
      pub fn write_to_chr(\n    chr_data: &mut [u8],\n    result: &PngImportResult,\n    top_left_tile: usize,\n    tiles_per_row: usize,\n) {\n    use crate::io::chr::encode_dot;\n\n    let top_row = top_left_tile \/ tiles_per_row;\n    let top_col = top_left_tile % tiles_per_row;\n\n    for py in 0..result.height {\n        for px in 0..result.width {\n            let tile_col = top_col + px \/ 8;\n            let tile_row = top_row + py \/ 8;\n            let tile_global = tile_row * tiles_per_row + tile_col;\n            let tile_offset = tile_global * 16;\n            if tile_offset + 16 > chr_data.len() {\n                continue; \/\/ CHR \u672b\u5c3e\u3092\u8d85\u3048\u305f\u3089\u30b9\u30ad\u30c3\u30d7\n            }\n            encode_dot(\n                &mut chr_data[tile_offset..tile_offset + 16],\n                px % 8,\n                py % 8,\n                result.pixels[px],\n            );\n        }\n    }\n}<\/pre>\n
      \u3053\u3053\u3067\u3082\u7d50\u5c40 encode_dot()<\/code> \u306b\u8fbf\u308a\u7740\u304f\u308f\u3051\u3067\u3001\u7b2c 2 \u56de\u3067\u300c\u5168\u3066\u306e\u66f8\u304d\u8fbc\u307f\u306e\u6700\u7d42\u51fa\u53e3\u300d\u3068\u8a00\u3063\u305f\u610f\u5473\u304c\u5206\u304b\u3063\u3066\u3044\u305f\u3060\u3051\u308b\u304b\u3068\u3002<\/p>\n
      Aseprite \u304b\u3089\u306e\u5b9f\u969b\u306e\u6d41\u308c<\/h4>\n
      \u6700\u5f8c\u306b\u3001\u81ea\u5206\u304c\u666e\u6bb5\u3084\u3063\u3066\u3044\u308b\u30ef\u30fc\u30af\u30d5\u30ed\u30fc\u3092\u3002<\/p>\n
        \n
      1. Aseprite \u3067 \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u30ab\u30e9\u30fc\u30e2\u30fc\u30c9<\/strong>\u306e\u30b9\u30d7\u30e9\u30a4\u30c8\u3092\u4f5c\u308b<\/li>\n
      2. \u30d1\u30ec\u30c3\u30c8\u3092 rchr.pal<\/code>\uff08\u307e\u305f\u306f\u5bfe\u8c61\u30b2\u30fc\u30e0\u306e\u5b9f\u969b\u306e NES \u30d1\u30ec\u30c3\u30c8\uff09\u304b\u3089\u8aad\u307f\u8fbc\u3080<\/li>\n
      3. File \u2192 Export<\/strong> \u3067 PNG \u66f8\u304d\u51fa\u3057\uff08\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u30ab\u30e9\u30fc\u306e\u307e\u307e\uff09<\/li>\n
      4. R-CHR \u3067\u5bfe\u8c61\u306e .nes<\/code> \u3092\u958b\u304d\u3001\u8cbc\u308a\u4ed8\u3051\u5148\u306e\u30bf\u30a4\u30eb\u3092\u9078\u629e<\/li>\n
      5. PNG \u3092\u30a6\u30a3\u30f3\u30c9\u30a6\u306b\u30c9\u30e9\u30c3\u30b0 & \u30c9\u30ed\u30c3\u30d7 \u2192 \u300c\u30d1\u30ec\u30c3\u30c8\u7167\u5408\u300d\u304c\u81ea\u52d5\u9078\u629e\u3055\u308c\u308b<\/li>\n
      6. \u30d7\u30ec\u30d3\u30e5\u30fc\u3092\u78ba\u8a8d\u3057\u3066\u300c\u8cbc\u308a\u4ed8\u3051\u300d<\/li>\n<\/ol>\n
        Aseprite \u5074\u3067\u900f\u660e\u306b\u3057\u305f\u90e8\u5206\u306f tRNS \u306b\u4e57\u3063\u3066\u304f\u308b\u306e\u3067\u3001\u305d\u306e\u307e\u307e CHR \u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9 0 \u306b\u306a\u308a\u307e\u3059\u3002\u3053\u306e\u6d41\u308c\u304c\u6574\u3063\u3066\u304b\u3089\u306f\u3001R-CHR \u5074\u3067\u76f4\u63a5\u63cf\u304f\u306e\u306f\u7d30\u304b\u3044\u4fee\u6b63\u3060\u3051\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n
        \u307e\u3068\u3081<\/h4>\n
          \n
        • PNG \u30a4\u30f3\u30dd\u30fc\u30c8\u306f\u300c\u753b\u50cf \u2192 0\u301c3 \u306e 2 \u6b21\u5143\u914d\u5217\u300d\u306b\u843d\u3068\u3059\u5909\u63db\u5c64\uff08io\/png.rs<\/code>\uff09\u3068\u3001\u30c0\u30a4\u30a2\u30ed\u30b0 UI\uff08editor\/png_import.rs<\/code>\uff09\u306b\u5206\u96e2<\/li>\n
        • PLTE \/ tRNS \u3092\u76f4\u63a5\u898b\u305f\u3044\u306e\u3067 png<\/code> \u30af\u30ec\u30fc\u30c8\u3067\u4f4e\u30ec\u30d9\u30eb\u306b\u8aad\u307f\u3001\u30d3\u30c3\u30c8\u6df1\u5ea6\u306f 1 \u30d0\u30a4\u30c8 \/ \u30d4\u30af\u30bb\u30eb\u306b\u5c55\u958b<\/li>\n
        • \u6226\u7565\u306f 3 \u3064\u3002\u30d1\u30ec\u30c3\u30c8\u7167\u5408\uff08PLTE \u2192 NES 64 \u8272 \u2192 DAT \u30bb\u30c3\u30c8\uff09\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u76f4\u63a5\uff08mod 4\uff09\u3001RGB \u8fd1\u4f3c\uff08\u5404\u30d4\u30af\u30bb\u30eb \u2192 DAT \u30bb\u30c3\u30c8 4 \u8272\uff09<\/li>\n
        • \u30d5\u30a1\u30a4\u30eb\u7a2e\u5225\u3067\u81ea\u52d5\u9078\u629e\u3001\u30c0\u30a4\u30a2\u30ed\u30b0\u3067\u624b\u52d5\u5207\u308a\u66ff\u3048 + \u30d7\u30ec\u30d3\u30e5\u30fc<\/li>\n
        • \u900f\u660e\u30d4\u30af\u30bb\u30eb\u306f\u30a4\u30f3\u30c7\u30c3\u30af\u30b9 0\uff08\u30b9\u30d7\u30e9\u30a4\u30c8\u306e\u900f\u660e\u8272\uff09\u306b<\/li>\n
        • \u8b66\u544a\u306f\u8a00\u8a9e\u975e\u4f9d\u5b58\u306e enum \u3067\u8fd4\u3057\u3001UI \u5c64\u3067\u6587\u5b57\u5217\u5316<\/li>\n
        • \u8cbc\u308a\u4ed8\u3051\u306f\u5f71\u97ff\u30bf\u30a4\u30eb\u5168\u90e8\u3092\u30b9\u30ca\u30c3\u30d7\u30b7\u30e7\u30c3\u30c8\u3057\u3066\u304b\u3089 encode_dot()<\/code> \u3067\u66f8\u304f\u306e\u3067\u3001\u30a2\u30f3\u30c9\u30a5\u53ef\u80fd<\/li>\n<\/ul>\n
          \u3053\u308c\u3067 R-CHR \u306e\u6a5f\u80fd\u9762\u306e\u89e3\u8aac\u306f\u307b\u307c\u5168\u90e8\u3067\u3059\u3002\u6b21\u56de\u306f\u6700\u7d42\u56de\u3001macOS \u306e\u30cd\u30a4\u30c6\u30a3\u30d6\u30e1\u30cb\u30e5\u30fc\u3001\u65e5\u672c\u8a9e \/ \u82f1\u8a9e\u306e\u5207\u308a\u66ff\u3048\u3001\u305d\u3057\u3066 GitHub Actions \u3067 3 OS \u5411\u3051\u306b\u30d3\u30eb\u30c9\u3057\u3066\u30ea\u30ea\u30fc\u30b9\u3059\u308b\u4ed5\u7d44\u307f<\/strong>\u306b\u3064\u3044\u3066\u307e\u3068\u3081\u307e\u3059\u3002egui \u3060\u3051\u3067\u306f\u8db3\u308a\u306a\u304b\u3063\u305f\u90e8\u5206\u3092\u3069\u3046\u57cb\u3081\u305f\u304b\u3001\u3068\u3044\u3046\u8a71\u3067\u3059\u306d\u3002<\/p>\n
          \u3067\u306f\u3067\u306f\u3041\u3002<\/p>\n
          \u307e\u305f\u307e\u305f\u3041\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
          \u3069\u3082\u3067\u3059\u3002 \u524d\u56de\u307e\u3067\u3067\u3001\u30a8\u30c7\u30a3\u30bf\u306e\u4e2d\u3067\u30c9\u30c3\u30c8\u3092\u63cf\u304f\u6a5f\u80fd\u306f\u4e00\u901a\u308a\u63c3\u3044\u307e\u3057\u305f\u3002\u305f\u3060\u3001\u6b63\u76f4\u306a\u3068\u3053\u308d\u3001\u672c\u683c\u7684\u306b\u30c9\u30c3\u30c8\u7d75\u3092\u63cf\u304f\u306a\u3089 Aseprite \u306e\u3088\u3046\u306a\u5c02\u7528\u30c4\u30fc\u30eb\u306e\u307b\u3046\u304c\u5727\u5012\u7684\u306b\u63cf\u304d\u3084\u3059\u3044\u308f\u3051\u3067\u3057\u3066\u3002 \u3060\u3063\u305f\u3089\u300c\u5916\u3067\u63cf\u3044\u305f  […]<\/p>\n","protected":false},"author":1,"featured_media":12827,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[299],"tags":[308,169,381,39,390,389,388,78,118],"class_list":["post-12791","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-rust","tag-gui","tag-mac","tag-nes","tag-39","tag-390","tag-389","tag-388","tag-78","tag-118"],"_links":{"self":[{"href":"https:\/\/www.webcyou.com\/index.php?rest_route=\/wp\/v2\/posts\/12791","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.webcyou.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.webcyou.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.webcyou.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.webcyou.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=12791"}],"version-history":[{"count":4,"href":"https:\/\/www.webcyou.com\/index.php?rest_route=\/wp\/v2\/posts\/12791\/revisions"}],"predecessor-version":[{"id":12835,"href":"https:\/\/www.webcyou.com\/index.php?rest_route=\/wp\/v2\/posts\/12791\/revisions\/12835"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.webcyou.com\/index.php?rest_route=\/wp\/v2\/media\/12827"}],"wp:attachment":[{"href":"https:\/\/www.webcyou.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=12791"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.webcyou.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=12791"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.webcyou.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=12791"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}