codec-image.inc.pl

   1 use utf8;
   2 +{
   3 codec => {
   4         jpeg => {
   5                 name => '<abbr title="Joint Photographic Experts Group">JPEG</abbr>',
   6                 available => 1992,
   7         },
   8         gif => {
   9                 name => '<abbr title="Graphics Interchange Format">GIF</abbr>',
  10                 available => 1987,
  11         },
  12         png => {
  13                 name => '<abbr title="Portable Network Graphics">PNG</abbr>',
  14                 available => 1996,
  15         },
  16         jp2k => {
  17                 name => 'JPEG 2000',
  18                 available => 2000,
  19         },
  20         webp => {
  21                 name => 'WebP',
  22                 available => 2010,
  23         },
  24         heic => {
  25                 name => '<abbr title="High Efficiency Image Container (HEVC in HEIF)">HEIC</abbr>',
  26                 available => 2015,
  27         },
  28         avif => {
  29                 name => '<abbr title="AV1 Image File Format">AVIF</abbr>',
  30                 available => 2019,
  31         },
  32         jxl => {
  33                 name => 'JPEG XL',
  34                 available => 2021,
  35         },
  36         pnm => {
  37                 name => '<abbr title="Portable aNyMap">PNM</abbr>',
  38                 available => 1988,
  39         },
  40 },
  41 feature => {
  42         default => {
  43                 children => [qw( quality_photo quality_art speed limits features royalties overhead support )],
  44         },
  45         quality_photo => {
  46                 name => 'compression (photo)',
  47                 score => {
  48                         jpeg => 3,
  49                         pnm  => 'n',
  50                         gif  => 1,
  51                         png  => 1,
  52                         jp2k => 4,
  53                         webp => 3,
  54                         heic => 5,
  55                         avif => 5,
  56                         jxl  => 5,
  57                 },
  58                 children => [qw( quality_photo_1 quality_photo_2 quality_photo_3 quality_photo_ll )],
  59         },
  60         quality_photo_1 => {
  61                 parent => 'quality_photo',
  62                 name => 'thumbnails',
  63                 score => {
  64                         jpeg => 2,
  65                         pnm  => 1,
  66                         gif  => 1,
  67                         png  => 1,
  68                         jp2k => 3,
  69                         webp => 4,
  70                         heic => 5,
  71                         avif => 5,
  72                         jxl  => 3,
  73                 },
  74         },
  75         quality_photo_2 => {
  76                 parent => 'quality_photo',
  77                 name => 'medium fidelity',
  78                 score => {
  79                         jpeg => 3,
  80                         pnm  => 1,
  81                         gif  => 1,
  82                         png  => 1,
  83                         jp2k => 4,
  84                         webp => 3,
  85                         heic => 4,
  86                         avif => 5,
  87                         jxl  => 5,
  88                 },
  89         },
  90         quality_photo_3 => {
  91                 parent => 'quality_photo',
  92                 name => 'high fidelity',
  93                 score => {
  94                         jpeg => 3,
  95                         pnm  => 1,
  96                         gif  => 1,
  97                         png  => 2,
  98                         jp2k => 4,
  99                         webp => 2,
 100                         heic => 3,
 101                         avif => 4,
 102                         jxl  => 5,
 103                 },
 104         },
 105         quality_photo_ll => {
 106                 parent => 'quality_photo',
 107                 name => 'lossless',
 108                 score => {
 109                         jpeg => 1,
 110                         pnm  => 1,
 111                         gif  => 1,
 112                         png  => 2,
 113                         jp2k => 4,
 114                         webp => 3,
 115                         heic => 3,
 116                         avif => 3,
 117                         jxl  => 5,
 118                 },
 119         },
 120         quality_art => {
 121                 name => 'compression (other images)',
 122                 score => {
 123                         jpeg => 2,
 124                         pnm  => 'n',
 125                         gif  => 1,
 126                         png  => 3,
 127                         jp2k => 2,
 128                         webp => 4,
 129                         heic => 3,
 130                         avif => 4.5,
 131                         jxl  => 5,
 132                 },
 133                 children => [qw( quality_art_2 quality_art_ll quality_art_mixed )],
 134         },
 135         quality_art_2 => {
 136                 name => 'lossy non-photographic',
 137                 score => {
 138                         jpeg => 2,
 139                         pnm  => 1,
 140                         gif  => 2,
 141                         png  => 3,
 142                         jp2k => 2,
 143                         webp => 4,
 144                         heic => 3,
 145                         avif => 5,
 146                         jxl  => 5,
 147                 },
 148         },
 149         quality_art_ll => {
 150                 name => 'lossless non-photographic',
 151                 score => {
 152                         jpeg => 1,
 153                         pnm  => 1,
 154                         gif  => 1,
 155                         png  => 4,
 156                         jp2k => 2,
 157                         webp => 5,
 158                         heic => 2,
 159                         avif => 3,
 160                         jxl  => 5,
 161                 },
 162         },
 163         quality_art_mixed => {
 164                 name => 'mixed photo/nonphoto',
 165                 score => {
 166                         jpeg => 2,
 167                         pnm  => 1,
 168                         gif  => 1,
 169                         png  => 2,
 170                         jp2k => 2,
 171                         webp => 3,
 172                         heic => 3,
 173                         avif => 5,
 174                         jxl  => 5,
 175                 },
 176         },
 177         speed => {
 178                 score => {
 179                         jpeg => 5,
 180                         pnm  => 5,
 181                         gif  => 4,
 182                         png  => 4,
 183                         jp2k => 3,
 184                         webp => 4,
 185                         heic => 3,
 186                         avif => 3,
 187                         jxl  => 5,
 188                 },
 189                 children => [qw( speed_encode speed_decode speed_parallel )],
 190         },
 191         speed_encode => {
 192                 parent => 'speed',
 193                 name => 'single-core encode',
 194                 score => {
 195                         jpeg => 5,
 196                         pnm  => 0,
 197                         gif  => 3, # palette conversion
 198                         png  => 3,
 199                         jp2k => 4,
 200                         webp => 4,
 201                         heic => 3,
 202                         avif => 2,
 203                         jxl  => 5,
 204                 },
 205         },
 206         speed_decode => {
 207                 parent => 'speed',
 208                 name => 'single-core decode',
 209                 score => {
 210                         jpeg => 5,
 211                         pnm  => 0,
 212                         gif  => 5,
 213                         png  => 5,
 214                         jp2k => 4,
 215                         webp => 5,
 216                         heic => 3,
 217                         avif => 3,
 218                         jxl  => 5,
 219                 },
 220         },
 221         speed_parallel => {
 222                 parent => 'speed',
 223                 name => 'pararellizable',
 224                 score => {
 225                         jpeg => 2,
 226                         pnm  => 0,
 227                         gif  => 2,
 228                         png  => 2,
 229                         jp2k => 4,
 230                         webp => 2,
 231                         heic => 4,
 232                         avif => 4,
 233                         jxl  => 5,
 234                 },
 235         },
 236         limits => {
 237                 score => {
 238                         jpeg => 3,
 239                         pnm  => 3,
 240                         gif  => 2,
 241                         png  => 4,
 242                         jp2k => 5,
 243                         webp => 2,
 244                         heic => 4,
 245                         avif => 4.5,
 246                         jxl  => 5,
 247                 },
 248                 children => [qw( max_dimensions max_bitdepth color_444 hdr max_channels  )],
 249         },
 250         max_dimensions => {
 251                 parent => 'limits',
 252                 name => 'maximum image dimensions',
 253                 score => {
 254                         jpeg => [3, '65k²'],   # 2**16
 255                         pnm  => [5,    '∞'],
 256                         gif  => [3, '65k²'],   # 2**16
 257                         png  => [4,  '2G²'],   # 2**31
 258                         jp2k => [4,  '4G²'],   # 2**32
 259                         webp => [1, '16k²'],   # 2**14
 260                         heic => [2,'8k×4k+', 'tilable, only 512×512 on Apple'], # 8193x4320
 261                         avif => [3, '65k²+', 'tilable, 7680×4320 with Advanced profile'], # 2**16
 262                         jxl  => [4,  '1G²'],   # 2**30
 263                 },
 264         },
 265         max_bitdepth => {
 266                 parent => 'limits',
 267                 name => 'precision (max. bit depth)',
 268                 score => {
 269                         jpeg => [2,  8],
 270                         pnm  => [2,  8, 'unofficial PFM extension for 32-bit'],
 271                         gif  => [1,  8, '256 colour palette per frame'],
 272                         png  => [4, 16],
 273                         jp2k => [5, 38],
 274                         webp => [2,  8],
 275                         heic => [3, 10], #TODO 16?
 276                         avif => [3, 12, '8, 10, 12 bit'],
 277                         jxl  => [5, 32, '24-bit integer or 32-bit float'],
 278                 },
 279         },
 280         color_444 => {
 281                 parent => 'limits',
 282                 name => 'chroma subsampling',
 283                 score => {
 284                         jpeg => ['y', undef, '4:2:0, 4:2:2, 4:4:4'],
 285                         pnm  => [4, '✘'],
 286                         gif  => [4, '✘'],
 287                         png  => [4, '✘'],
 288                         jp2k => 'y',
 289                         webp => [1, '4:2:0'],
 290                         heic => [1, '4:2:0'],
 291                         avif => ['y', undef, '4:2:0, 4:2:2, 4:4:4'],
 292                         jxl  => ['y', undef, 'for JPEG compatibility'],
 293                 },
 294         },
 295         hdr => {
 296                 parent => 'limits',
 297                 name => 'wide gamut/HDR',
 298                 score => {
 299                         jpeg => 'n',
 300                         pnm  => 'n',
 301                         gif  => 'n',
 302                         png  => 'y',
 303                         jp2k => 'y',
 304                         webp => 'n',
 305                         heic => 'y',
 306                         avif => 'y',
 307                         jxl  => 'y',
 308                 },
 309         },
 310         max_channels => {
 311                 parent => 'limits',
 312                 name => 'maximum number of channels',
 313                 score => {
 314                         jpeg => [3, 4, 'RGB or CMYK'],
 315                         pnm  => [3, 3, 'RGB'],
 316                         gif  => [3, 3, 'RGB palette'],
 317                         png  => [3, 4, 'RGBA'],
 318                         jp2k => [5, 2**15],
 319                         webp => [3, 4, 'RGBA'],
 320                         heic => [3, 3, 'RGB, separate alpha and depth'],
 321                         avif => [3, 3, 'RGB, separate alpha and depth'],
 322                         jxl  => [4, 4099, 'native XYB'],
 323                 },
 324         },
 325         features => {
 326                 score => {
 327                         jpeg => 2,
 328                         pnm  => [2, undef, 'great for simplicity and ASCII storage'],
 329                         gif  => 2,
 330                         png  => 3,
 331                         jp2k => 4,
 332                         webp => 2,
 333                         heic => 4,
 334                         avif => 4,
 335                         jxl  => 5,
 336                 },
 337                 children => [qw( animation progressive alpha depthmap overlays authoring reencode compat_jpeg )],
 338         },
 339         animation => {
 340                 parent => 'features',
 341                 name => 'supports animation',
 342                 score => {
 343                         jpeg => [2, 'MJPEG'],
 344                         pnm  => 'n',
 345                         gif  => 'y',
 346                         png  => [4, 'APNG', 'later backwards-compatible extension'],
 347                         jp2k => [2, 'MJP2'],
 348                         webp => 'y',
 349                         heic => 'y',
 350                         avif => 'y',
 351                         jxl  => 'y',
 352                 },
 353         },
 354         progressive => {
 355                 parent => 'features',
 356                 name => 'progressive decoding',
 357                 score => {
 358                         jpeg => 4,
 359                         pnm  => 'n',
 360                         gif  => 2,
 361                         png  => 2,
 362                         jp2k => 5,
 363                         webp => 'n',
 364                         heic => 'n',
 365                         avif => 'n',
 366                         jxl  => 5,
 367                 },
 368         },
 369         alpha => {
 370                 parent => 'features',
 371                 name => 'alpha transparency',
 372                 score => {
 373                         jpeg => 'n',
 374                         pnm  => ['n', undef, 'PAM extension'],
 375                         gif  => [3, '1 bit'],
 376                         png  => 'y',
 377                         jp2k => 'y',
 378                         webp => 'y',
 379                         heic => 'y',
 380                         avif => 'y',
 381                         jxl  => 'y',
 382                 },
 383         },
 384         depthmap => {
 385                 parent => 'features',
 386                 name => 'depth map',
 387                 score => {
 388                         jpeg => 'n',
 389                         pnm  => 'n',
 390                         gif  => 'n',
 391                         png  => 'n',
 392                         jp2k => 'n',
 393                         webp => 'n',
 394                         heic => 'y',
 395                         avif => 'y',
 396                         jxl  => 'y',
 397                 },
 398         },
 399         overlays => {
 400                 parent => 'features',
 401                 name => 'overlays (layers)',
 402                 score => {
 403                         jpeg => 'n',
 404                         pnm  => 'n',
 405                         gif  => 'y',
 406                         png  => 'n',
 407                         jp2k => 'n',
 408                         webp => 'n',
 409                         heic => 'y',
 410                         avif => 'y',
 411                         jxl  => 'y',
 412                 },
 413         },
 414         authoring => {
 415                 parent => 'features',
 416                 name => 'authoring workflow suitability',
 417                 score => {
 418                         jpeg => 2,
 419                         pnm  => 2,
 420                         gif  => 2,
 421                         png  => 3,
 422                         jp2k => 3,
 423                         webp => 2,
 424                         heic => 2,
 425                         avif => 2,
 426                         jxl  => 5,
 427                 },
 428         },
 429         reencode => {
 430                 parent => 'features',
 431                 name => 'generation loss resilience',
 432                 score => {
 433                         jpeg => 4,
 434                         pnm  => 0,
 435                         png  => 0,
 436                         gif  => 0,
 437                         jp2k => 3,
 438                         webp => 2,
 439                         heic => 3,
 440                         avif => 3,
 441                         jxl  => 4,
 442                 },
 443         },
 444         compat_jpeg => {
 445                 parent => 'features',
 446                 name => 'lossless JPEG recompression',
 447                 score => {
 448                         jpeg => 0,
 449                         pnm  => 'n',
 450                         gif  => 'n',
 451                         png  => 'n',
 452                         jp2k => 'n',
 453                         webp => 'n',
 454                         heic => 'n',
 455                         avif => 'n',
 456                         jxl  => 'y',
 457                 },
 458         },
 459         royalties => {
 460                 name => 'royalty-free',
 461                 score => {
 462                         jpeg => 5,
 463                         pnm  => 5,
 464                         gif  => [5, undef, 'patented before 2003'],
 465                         png  => 5,
 466                         jp2k => [3, undef, 'ISO specification not freely available'],
 467                         webp => [4, undef, 'free format, low remaining risk of patent trolls'],
 468                         heic => ['n', undef, 'heavily patented'],
 469                         avif => [4, undef, 'free format, risk of patent trolls'],
 470                         jxl  => [4, undef, 'free format, risk of patent trolls'],
 471                 },
 472                 children => [],
 473         },
 474         support => {
 475                 score => {
 476                         jpeg => 5,
 477                         pnm  => [2, undef],
 478                         gif  => 5,
 479                         png  => 5,
 480                         jp2k => [2, undef, 'Apple only'],
 481                         webp => [4, undef, 'modern browsers'],
 482                         heic => [1, undef, 'stored by latest cameras, no browser support'],
 483                         avif => [3, undef, 'all modern browsers except Safari and Edge'],
 484                         jxl  => [2, undef, 'upcoming in most browsers'],
 485                 },
 486         },
 487         overhead => {
 488                 name => 'container overhead (file size)',
 489                 score => {
 490                         png  => [3,  67, 'upto 70 bytes for specific RGBA'],
 491                         jpeg => [2, 160, '159 bytes minimum for gray, 288 for specific colours'],
 492                         gif  => [4,  35, '43 bytes for transparent'],
 493                         webp => [4,  34, 'black or transparent lossless; 44-92 bytes lossy'],
 494                         bpg  => [4,  31, 'lossy 29-62 bytes, lossless 37-160'],
 495                         flif => [5,  14, 'black or transparent; 20 bytes for specific RGBA'],
 496                         pnm  => [5,   8, 'monochrome text PBM; 12 bytes PPM; 69 bytes PAM'],
 497                         jxl  => [5,  12, '512×256 black pixels'],
 498                         avif => [1, 282, 'container overhead; 457 bytes with alpha'],
 499                         jp2k => [2, 123, 'experimental results, likely not optimal'],
 500                         heic => [1, 386],
 501                 },
 502         },
 503 },
 504 }