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                 generation => 0,
   8         },
   9         gif => {
  10                 name => '<abbr title="Graphics Interchange Format">GIF</abbr>',
  11                 available => 1987,
  12                 generation => 0,
  13         },
  14         png => {
  15                 name => '<abbr title="Portable Network Graphics">PNG</abbr>',
  16                 available => 1996,
  17                 generation => 1,
  18         },
  19         jp2k => {
  20                 name => 'JPEG 2000',
  21                 available => 2000,
  22                 generation => 1,
  23         },
  24         webp => {
  25                 name => 'WebP',
  26                 available => 2010,
  27                 generation => 1,
  28         },
  29         heic => {
  30                 name => '<abbr title="High Efficiency Image Container (HEVC in HEIF)">HEIC</abbr>',
  31                 available => 2015,
  32                 generation => 2,
  33         },
  34         avif => {
  35                 name => '<abbr title="AV1 Image File Format">AVIF</abbr>',
  36                 available => 2019,
  37                 generation => 2,
  38         },
  39         jxl => {
  40                 name => 'JPEG XL',
  41                 available => 2021,
  42                 generation => 2,
  43         },
  44         pnm => {
  45                 name => '<abbr title="Portable aNyMap">PNM</abbr>',
  46                 available => 1988,
  47                 generation => 0,
  48         },
  49 },
  50 feature => {
  51         default => {
  52                 children => [qw( quality_photo quality_art speed limits features royalties overhead support )],
  53         },
  54         quality_photo => {
  55                 name => 'compression (photo)',
  56                 score => {
  57                         jpeg => 3,
  58                         pnm  => 'n',
  59                         gif  => 1,
  60                         png  => 1,
  61                         jp2k => 4,
  62                         webp => 3,
  63                         heic => 5,
  64                         avif => 5,
  65                         jxl  => 5,
  66                 },
  67                 children => [qw( quality_photo_1 quality_photo_2 quality_photo_3 quality_photo_ll )],
  68         },
  69         quality_photo_1 => {
  70                 parent => 'quality_photo',
  71                 name => 'thumbnails',
  72                 score => {
  73                         jpeg => 2,
  74                         pnm  => 1,
  75                         gif  => 1,
  76                         png  => 1,
  77                         jp2k => 3,
  78                         webp => 4,
  79                         heic => 5,
  80                         avif => 5,
  81                         jxl  => 3,
  82                 },
  83         },
  84         quality_photo_2 => {
  85                 parent => 'quality_photo',
  86                 name => 'medium fidelity',
  87                 score => {
  88                         jpeg => 3,
  89                         pnm  => 1,
  90                         gif  => 1,
  91                         png  => 1,
  92                         jp2k => 4,
  93                         webp => 3,
  94                         heic => 4,
  95                         avif => 5,
  96                         jxl  => 5,
  97                 },
  98         },
  99         quality_photo_3 => {
 100                 parent => 'quality_photo',
 101                 name => 'high fidelity',
 102                 score => {
 103                         jpeg => 3,
 104                         pnm  => 1,
 105                         gif  => 1,
 106                         png  => 2,
 107                         jp2k => 4,
 108                         webp => 2,
 109                         heic => 3,
 110                         avif => 4,
 111                         jxl  => 5,
 112                 },
 113         },
 114         quality_photo_ll => {
 115                 parent => 'quality_photo',
 116                 name => 'lossless',
 117                 score => {
 118                         jpeg => 1,
 119                         pnm  => 1,
 120                         gif  => 1,
 121                         png  => 2,
 122                         jp2k => 4,
 123                         webp => 3,
 124                         heic => 3,
 125                         avif => 3,
 126                         jxl  => 5,
 127                 },
 128         },
 129         quality_art => {
 130                 name => 'compression (other images)',
 131                 score => {
 132                         jpeg => 2,
 133                         pnm  => 'n',
 134                         gif  => 1,
 135                         png  => 3,
 136                         jp2k => 2,
 137                         webp => 4,
 138                         heic => 3,
 139                         avif => 4.5,
 140                         jxl  => 5,
 141                 },
 142                 children => [qw( quality_art_2 quality_art_ll quality_art_mixed )],
 143         },
 144         quality_art_2 => {
 145                 name => 'lossy non-photographic',
 146                 score => {
 147                         jpeg => 2,
 148                         pnm  => 1,
 149                         gif  => 2,
 150                         png  => 3,
 151                         jp2k => 2,
 152                         webp => 4,
 153                         heic => 3,
 154                         avif => 5,
 155                         jxl  => 5,
 156                 },
 157         },
 158         quality_art_ll => {
 159                 name => 'lossless non-photographic',
 160                 score => {
 161                         jpeg => 1,
 162                         pnm  => 1,
 163                         gif  => 1,
 164                         png  => 4,
 165                         jp2k => 2,
 166                         webp => 5,
 167                         heic => 2,
 168                         avif => 3,
 169                         jxl  => 5,
 170                 },
 171         },
 172         quality_art_mixed => {
 173                 name => 'mixed photo/nonphoto',
 174                 score => {
 175                         jpeg => 2,
 176                         pnm  => 1,
 177                         gif  => 1,
 178                         png  => 2,
 179                         jp2k => 2,
 180                         webp => 3,
 181                         heic => 3,
 182                         avif => 5,
 183                         jxl  => 5,
 184                 },
 185         },
 186         speed => {
 187                 score => {
 188                         jpeg => 5,
 189                         pnm  => 5,
 190                         gif  => 4,
 191                         png  => 4,
 192                         jp2k => 3,
 193                         webp => 4,
 194                         heic => 3,
 195                         avif => 3,
 196                         jxl  => 5,
 197                 },
 198                 children => [qw( speed_encode speed_decode speed_parallel )],
 199         },
 200         speed_encode => {
 201                 parent => 'speed',
 202                 name => 'single-core encode',
 203                 score => {
 204                         jpeg => 5,
 205                         pnm  => 0,
 206                         gif  => 3, # palette conversion
 207                         png  => 3,
 208                         jp2k => 4,
 209                         webp => 4,
 210                         heic => 3,
 211                         avif => 2,
 212                         jxl  => 5,
 213                 },
 214         },
 215         speed_decode => {
 216                 parent => 'speed',
 217                 name => 'single-core decode',
 218                 score => {
 219                         jpeg => 5,
 220                         pnm  => 0,
 221                         gif  => 5,
 222                         png  => 5,
 223                         jp2k => 4,
 224                         webp => 5,
 225                         heic => 3,
 226                         avif => 3,
 227                         jxl  => 5,
 228                 },
 229         },
 230         speed_parallel => {
 231                 parent => 'speed',
 232                 name => 'pararellizable',
 233                 score => {
 234                         jpeg => 2,
 235                         pnm  => 0,
 236                         gif  => 2,
 237                         png  => 2,
 238                         jp2k => 4,
 239                         webp => 2,
 240                         heic => 4,
 241                         avif => 4,
 242                         jxl  => 5,
 243                 },
 244         },
 245         limits => {
 246                 score => {
 247                         jpeg => 3,
 248                         pnm  => 3,
 249                         gif  => 2,
 250                         png  => 4,
 251                         jp2k => 5,
 252                         webp => 2,
 253                         heic => 4,
 254                         avif => 4.5,
 255                         jxl  => 5,
 256                 },
 257                 children => [qw( max_dimensions max_bitdepth color_444 hdr max_channels  )],
 258         },
 259         max_dimensions => {
 260                 parent => 'limits',
 261                 name => 'maximum image dimensions',
 262                 score => {
 263                         jpeg => [3, '65k²'],   # 2**16
 264                         pnm  => [5,    '∞'],
 265                         gif  => [3, '65k²'],   # 2**16
 266                         png  => [4,  '2G²'],   # 2**31
 267                         jp2k => [4,  '4G²'],   # 2**32
 268                         webp => [1, '16k²'],   # 2**14
 269                         heic => [2,'8k×4k+', 'tilable, only 512×512 on Apple'], # 8193x4320
 270                         avif => [3, '65k²+', 'tilable, 7680×4320 with Advanced profile'], # 2**16
 271                         jxl  => [4,  '1G²'],   # 2**30
 272                 },
 273         },
 274         max_bitdepth => {
 275                 parent => 'limits',
 276                 name => 'precision (max. bit depth)',
 277                 score => {
 278                         jpeg => [2,  8],
 279                         pnm  => [2,  8, 'unofficial PFM extension for 32-bit'],
 280                         gif  => [1,  8, '256 colour palette per frame'],
 281                         png  => [4, 16],
 282                         jp2k => [5, 38],
 283                         webp => [2,  8],
 284                         heic => [3, 10], #TODO 16?
 285                         avif => [3, 12, '8, 10, 12 bit'],
 286                         jxl  => [5, 32, '24-bit integer or 32-bit float'],
 287                 },
 288         },
 289         color_444 => {
 290                 parent => 'limits',
 291                 name => 'chroma subsampling',
 292                 score => {
 293                         jpeg => ['y', undef, '4:2:0, 4:2:2, 4:4:4'],
 294                         pnm  => [4, '✘'],
 295                         gif  => [4, '✘'],
 296                         png  => [4, '✘'],
 297                         jp2k => 'y',
 298                         webp => [1, '4:2:0'],
 299                         heic => [1, '4:2:0'],
 300                         avif => ['y', undef, '4:2:0, 4:2:2, 4:4:4'],
 301                         jxl  => ['y', undef, 'for JPEG compatibility'],
 302                 },
 303         },
 304         hdr => {
 305                 parent => 'limits',
 306                 name => 'wide gamut/HDR',
 307                 score => {
 308                         jpeg => 'n',
 309                         pnm  => 'n',
 310                         gif  => 'n',
 311                         png  => 'y',
 312                         jp2k => 'y',
 313                         webp => 'n',
 314                         heic => 'y',
 315                         avif => 'y',
 316                         jxl  => 'y',
 317                 },
 318         },
 319         max_channels => {
 320                 parent => 'limits',
 321                 name => 'maximum number of channels',
 322                 score => {
 323                         jpeg => [3, 4, 'RGB or CMYK'],
 324                         pnm  => [3, 3, 'RGB'],
 325                         gif  => [3, 3, 'RGB palette'],
 326                         png  => [3, 4, 'RGBA'],
 327                         jp2k => [5, 2**15],
 328                         webp => [3, 4, 'RGBA'],
 329                         heic => [3, 3, 'RGB, separate alpha and depth'],
 330                         avif => [3, 3, 'RGB, separate alpha and depth'],
 331                         jxl  => [4, 4099, 'native XYB'],
 332                 },
 333         },
 334         features => {
 335                 score => {
 336                         jpeg => 2,
 337                         pnm  => [2, undef, 'great for simplicity and ASCII storage'],
 338                         gif  => 2,
 339                         png  => 3,
 340                         jp2k => 4,
 341                         webp => 2,
 342                         heic => 4,
 343                         avif => 4,
 344                         jxl  => 5,
 345                 },
 346                 children => [qw( animation progressive alpha depthmap overlays authoring reencode compat_jpeg )],
 347         },
 348         animation => {
 349                 parent => 'features',
 350                 name => 'supports animation',
 351                 score => {
 352                         jpeg => [2, 'MJPEG'],
 353                         pnm  => 'n',
 354                         gif  => 'y',
 355                         png  => [4, 'APNG', 'later backwards-compatible extension'],
 356                         jp2k => [2, 'MJP2'],
 357                         webp => 'y',
 358                         heic => 'y',
 359                         avif => 'y',
 360                         jxl  => 'y',
 361                 },
 362         },
 363         progressive => {
 364                 parent => 'features',
 365                 name => 'progressive decoding',
 366                 score => {
 367                         jpeg => 4,
 368                         pnm  => 'n',
 369                         gif  => 2,
 370                         png  => 2,
 371                         jp2k => 5,
 372                         webp => 'n',
 373                         heic => 'n',
 374                         avif => 'n',
 375                         jxl  => 5,
 376                 },
 377         },
 378         alpha => {
 379                 parent => 'features',
 380                 name => 'alpha transparency',
 381                 score => {
 382                         jpeg => 'n',
 383                         pnm  => ['n', undef, 'PAM extension'],
 384                         gif  => [3, '1 bit'],
 385                         png  => 'y',
 386                         jp2k => 'y',
 387                         webp => 'y',
 388                         heic => 'y',
 389                         avif => 'y',
 390                         jxl  => 'y',
 391                 },
 392         },
 393         depthmap => {
 394                 parent => 'features',
 395                 name => 'depth map',
 396                 score => {
 397                         jpeg => 'n',
 398                         pnm  => 'n',
 399                         gif  => 'n',
 400                         png  => 'n',
 401                         jp2k => 'n',
 402                         webp => 'n',
 403                         heic => 'y',
 404                         avif => 'y',
 405                         jxl  => 'y',
 406                 },
 407         },
 408         overlays => {
 409                 parent => 'features',
 410                 name => 'overlays (layers)',
 411                 score => {
 412                         jpeg => 'n',
 413                         pnm  => 'n',
 414                         gif  => 'y',
 415                         png  => 'n',
 416                         jp2k => 'n',
 417                         webp => 'n',
 418                         heic => 'y',
 419                         avif => 'y',
 420                         jxl  => 'y',
 421                 },
 422         },
 423         authoring => {
 424                 parent => 'features',
 425                 name => 'authoring workflow suitability',
 426                 score => {
 427                         jpeg => 2,
 428                         pnm  => 2,
 429                         gif  => 2,
 430                         png  => 3,
 431                         jp2k => 3,
 432                         webp => 2,
 433                         heic => 2,
 434                         avif => 2,
 435                         jxl  => 5,
 436                 },
 437         },
 438         reencode => {
 439                 parent => 'features',
 440                 name => 'generation loss resilience',
 441                 score => {
 442                         jpeg => 4,
 443                         pnm  => 0,
 444                         png  => 0,
 445                         gif  => 0,
 446                         jp2k => 3,
 447                         webp => 2,
 448                         heic => 3,
 449                         avif => 3,
 450                         jxl  => 4,
 451                 },
 452         },
 453         compat_jpeg => {
 454                 parent => 'features',
 455                 name => 'lossless JPEG recompression',
 456                 score => {
 457                         jpeg => 0,
 458                         pnm  => 'n',
 459                         gif  => 'n',
 460                         png  => 'n',
 461                         jp2k => 'n',
 462                         webp => 'n',
 463                         heic => 'n',
 464                         avif => 'n',
 465                         jxl  => 'y',
 466                 },
 467         },
 468         royalties => {
 469                 name => 'royalty-free',
 470                 score => {
 471                         jpeg => 5,
 472                         pnm  => 5,
 473                         gif  => [5, undef, 'patented before 2003'],
 474                         png  => 5,
 475                         jp2k => [3, undef, 'ISO specification not freely available'],
 476                         webp => [4, undef, 'free format, low remaining risk of patent trolls'],
 477                         heic => ['n', undef, 'heavily patented'],
 478                         avif => [4, undef, 'free format, risk of patent trolls'],
 479                         jxl  => [4, undef, 'free format, risk of patent trolls'],
 480                 },
 481                 children => [],
 482         },
 483         support => {
 484                 score => {
 485                         jpeg => 5,
 486                         pnm  => [2, undef],
 487                         gif  => 5,
 488                         png  => 5,
 489                         jp2k => [2, undef, 'Apple only'],
 490                         webp => [4, undef, 'modern browsers'],
 491                         heic => [1, undef, 'stored by latest cameras, no browser support'],
 492                         avif => [3, undef, 'all modern browsers except Safari and Edge'],
 493                         jxl  => [2, undef, 'upcoming in most browsers'],
 494                 },
 495         },
 496         overhead => {
 497                 name => 'container overhead (file size)',
 498                 score => {
 499                         png  => [3,  67, 'upto 70 bytes for specific RGBA'],
 500                         jpeg => [2, 160, '159 bytes minimum for gray, 288 for specific colours'],
 501                         gif  => [4,  35, '43 bytes for transparent'],
 502                         webp => [4,  34, 'black or transparent lossless; 44-92 bytes lossy'],
 503                         bpg  => [4,  31, 'lossy 29-62 bytes, lossless 37-160'],
 504                         flif => [5,  14, 'black or transparent; 20 bytes for specific RGBA'],
 505                         pnm  => [5,   8, 'monochrome text PBM; 12 bytes PPM; 69 bytes PAM'],
 506                         jxl  => [5,  12, '512×256 black pixels'],
 507                         avif => [1, 282, 'container overhead; 457 bytes with alpha'],
 508                         jp2k => [2, 123, 'experimental results, likely not optimal'],
 509                         heic => [1, 386],
 510                 },
 511         },
 512 },
 513 }