X-Git-Url: http://git.shiar.nl/sheet.git/blobdiff_plain/9918b9a0fe4c8ddb0a78cc4639959b2463c1f4dd..e1c15e98e78002475bc637d1a5848b45414b9e41:/codec-image.inc.pl

diff --git a/codec-image.inc.pl b/codec-image.inc.pl
new file mode 100644
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+++ b/codec-image.inc.pl
@@ -0,0 +1,504 @@
+use utf8;
++{
+codec => {
+	jpeg => {
+		name => '<abbr title="Joint Photographic Experts Group">JPEG</abbr>',
+		available => 1992,
+	},
+	gif => {
+		name => '<abbr title="Graphics Interchange Format">GIF</abbr>',
+		available => 1987,
+	},
+	png => {
+		name => '<abbr title="Portable Network Graphics">PNG</abbr>',
+		available => 1996,
+	},
+	jp2k => {
+		name => 'JPEG 2000',
+		available => 2000,
+	},
+	webp => {
+		name => 'WebP',
+		available => 2010,
+	},
+	heic => {
+		name => '<abbr title="High Efficiency Image Container (HEVC in HEIF)">HEIC</abbr>',
+		available => 2015,
+	},
+	avif => {
+		name => '<abbr title="AV1 Image File Format">AVIF</abbr>',
+		available => 2019,
+	},
+	jxl => {
+		name => 'JPEG XL',
+		available => 2021,
+	},
+	pnm => {
+		name => '<abbr title="Portable aNyMap">PNM</abbr>',
+		available => 1988,
+	},
+},
+feature => {
+	default => {
+		children => [qw( quality_photo quality_art speed limits features royalties overhead support )],
+	},
+	quality_photo => {
+		name => 'compression (photo)',
+		score => {
+			jpeg => 3,
+			pnm  => 'n',
+			gif  => 1,
+			png  => 1,
+			jp2k => 4,
+			webp => 3,
+			heic => 5,
+			avif => 5,
+			jxl  => 5,
+		},
+		children => [qw( quality_photo_1 quality_photo_2 quality_photo_3 quality_photo_ll )],
+	},
+	quality_photo_1 => {
+		parent => 'quality_photo',
+		name => 'thumbnails',
+		score => {
+			jpeg => 2,
+			pnm  => 1,
+			gif  => 1,
+			png  => 1,
+			jp2k => 3,
+			webp => 4,
+			heic => 5,
+			avif => 5,
+			jxl  => 3,
+		},
+	},
+	quality_photo_2 => {
+		parent => 'quality_photo',
+		name => 'medium fidelity',
+		score => {
+			jpeg => 3,
+			pnm  => 1,
+			gif  => 1,
+			png  => 1,
+			jp2k => 4,
+			webp => 3,
+			heic => 4,
+			avif => 5,
+			jxl  => 5,
+		},
+	},
+	quality_photo_3 => {
+		parent => 'quality_photo',
+		name => 'high fidelity',
+		score => {
+			jpeg => 3,
+			pnm  => 1,
+			gif  => 1,
+			png  => 2,
+			jp2k => 4,
+			webp => 2,
+			heic => 3,
+			avif => 4,
+			jxl  => 5,
+		},
+	},
+	quality_photo_ll => {
+		parent => 'quality_photo',
+		name => 'lossless',
+		score => {
+			jpeg => 1,
+			pnm  => 1,
+			gif  => 1,
+			png  => 2,
+			jp2k => 4,
+			webp => 3,
+			heic => 3,
+			avif => 3,
+			jxl  => 5,
+		},
+	},
+	quality_art => {
+		name => 'compression (other images)',
+		score => {
+			jpeg => 2,
+			pnm  => 'n',
+			gif  => 1,
+			png  => 3,
+			jp2k => 2,
+			webp => 4,
+			heic => 3,
+			avif => 4.5,
+			jxl  => 5,
+		},
+		children => [qw( quality_art_2 quality_art_ll quality_art_mixed )],
+	},
+	quality_art_2 => {
+		name => 'lossy non-photographic',
+		score => {
+			jpeg => 2,
+			pnm  => 1,
+			gif  => 2,
+			png  => 3,
+			jp2k => 2,
+			webp => 4,
+			heic => 3,
+			avif => 5,
+			jxl  => 5,
+		},
+	},
+	quality_art_ll => {
+		name => 'lossless non-photographic',
+		score => {
+			jpeg => 1,
+			pnm  => 1,
+			gif  => 1,
+			png  => 4,
+			jp2k => 2,
+			webp => 5,
+			heic => 2,
+			avif => 3,
+			jxl  => 5,
+		},
+	},
+	quality_art_mixed => {
+		name => 'mixed photo/nonphoto',
+		score => {
+			jpeg => 2,
+			pnm  => 1,
+			gif  => 1,
+			png  => 2,
+			jp2k => 2,
+			webp => 3,
+			heic => 3,
+			avif => 5,
+			jxl  => 5,
+		},
+	},
+	speed => {
+		score => {
+			jpeg => 5,
+			pnm  => 5,
+			gif  => 4,
+			png  => 4,
+			jp2k => 3,
+			webp => 4,
+			heic => 3,
+			avif => 3,
+			jxl  => 5,
+		},
+		children => [qw( speed_encode speed_decode speed_parallel )],
+	},
+	speed_encode => {
+		parent => 'speed',
+		name => 'single-core encode',
+		score => {
+			jpeg => 5,
+			pnm  => 0,
+			gif  => 3, # palette conversion
+			png  => 3,
+			jp2k => 4,
+			webp => 4,
+			heic => 3,
+			avif => 2,
+			jxl  => 5,
+		},
+	},
+	speed_decode => {
+		parent => 'speed',
+		name => 'single-core decode',
+		score => {
+			jpeg => 5,
+			pnm  => 0,
+			gif  => 5,
+			png  => 5,
+			jp2k => 4,
+			webp => 5,
+			heic => 3,
+			avif => 3,
+			jxl  => 5,
+		},
+	},
+	speed_parallel => {
+		parent => 'speed',
+		name => 'pararellizable',
+		score => {
+			jpeg => 2,
+			pnm  => 0,
+			gif  => 2,
+			png  => 2,
+			jp2k => 4,
+			webp => 2,
+			heic => 4,
+			avif => 4,
+			jxl  => 5,
+		},
+	},
+	limits => {
+		score => {
+			jpeg => 3,
+			pnm  => 3,
+			gif  => 2,
+			png  => 4,
+			jp2k => 5,
+			webp => 2,
+			heic => 4,
+			avif => 4.5,
+			jxl  => 5,
+		},
+		children => [qw( max_dimensions max_bitdepth color_444 hdr max_channels  )],
+	},
+	max_dimensions => {
+		parent => 'limits',
+		name => 'maximum image dimensions',
+		score => {
+			jpeg => [3, '65k²'],   # 2**16
+			pnm  => [5,    '∞'],
+			gif  => [3, '65k²'],   # 2**16
+			png  => [4,  '2G²'],   # 2**31
+			jp2k => [4,  '4G²'],   # 2**32
+			webp => [1, '16k²'],   # 2**14
+			heic => [2,'8k×4k+', 'tilable, only 512×512 on Apple'], # 8193x4320
+			avif => [3, '65k²+', 'tilable, 7680×4320 with Advanced profile'], # 2**16
+			jxl  => [4,  '1G²'],   # 2**30
+		},
+	},
+	max_bitdepth => {
+		parent => 'limits',
+		name => 'precision (max. bit depth)',
+		score => {
+			jpeg => [2,  8],
+			pnm  => [2,  8, 'unofficial PFM extension for 32-bit'],
+			gif  => [1,  8, '256 colour palette per frame'],
+			png  => [4, 16],
+			jp2k => [5, 38],
+			webp => [2,  8],
+			heic => [3, 10], #TODO 16?
+			avif => [3, 12, '8, 10, 12 bit'],
+			jxl  => [5, 32, '24-bit integer or 32-bit float'],
+		},
+	},
+	color_444 => {
+		parent => 'limits',
+		name => 'chroma subsampling',
+		score => {
+			jpeg => ['y', undef, '4:2:0, 4:2:2, 4:4:4'],
+			pnm  => [4, '✘'],
+			gif  => [4, '✘'],
+			png  => [4, '✘'],
+			jp2k => 'y',
+			webp => [1, '4:2:0'],
+			heic => [1, '4:2:0'],
+			avif => ['y', undef, '4:2:0, 4:2:2, 4:4:4'],
+			jxl  => ['y', undef, 'for JPEG compatibility'],
+		},
+	},
+	hdr => {
+		parent => 'limits',
+		name => 'wide gamut/HDR',
+		score => {
+			jpeg => 'n',
+			pnm  => 'n',
+			gif  => 'n',
+			png  => 'y',
+			jp2k => 'y',
+			webp => 'n',
+			heic => 'y',
+			avif => 'y',
+			jxl  => 'y',
+		},
+	},
+	max_channels => {
+		parent => 'limits',
+		name => 'maximum number of channels',
+		score => {
+			jpeg => [3, 4, 'RGB or CMYK'],
+			pnm  => [3, 3, 'RGB'],
+			gif  => [3, 3, 'RGB palette'],
+			png  => [3, 4, 'RGBA'],
+			jp2k => [5, 2**15],
+			webp => [3, 4, 'RGBA'],
+			heic => [3, 3, 'RGB, separate alpha and depth'],
+			avif => [3, 3, 'RGB, separate alpha and depth'],
+			jxl  => [4, 4099, 'native XYB'],
+		},
+	},
+	features => {
+		score => {
+			jpeg => 2,
+			pnm  => [2, undef, 'great for simplicity and ASCII storage'],
+			gif  => 2,
+			png  => 3,
+			jp2k => 4,
+			webp => 2,
+			heic => 4,
+			avif => 4,
+			jxl  => 5,
+		},
+		children => [qw( animation progressive alpha depthmap overlays authoring reencode compat_jpeg )],
+	},
+	animation => {
+		parent => 'features',
+		name => 'supports animation',
+		score => {
+			jpeg => [2, 'MJPEG'],
+			pnm  => 'n',
+			gif  => 'y',
+			png  => [4, 'APNG', 'later backwards-compatible extension'],
+			jp2k => [2, 'MJP2'],
+			webp => 'y',
+			heic => 'y',
+			avif => 'y',
+			jxl  => 'y',
+		},
+	},
+	progressive => {
+		parent => 'features',
+		name => 'progressive decoding',
+		score => {
+			jpeg => 4,
+			pnm  => 'n',
+			gif  => 2,
+			png  => 2,
+			jp2k => 5,
+			webp => 'n',
+			heic => 'n',
+			avif => 'n',
+			jxl  => 5,
+		},
+	},
+	alpha => {
+		parent => 'features',
+		name => 'alpha transparency',
+		score => {
+			jpeg => 'n',
+			pnm  => ['n', undef, 'PAM extension'],
+			gif  => [3, '1 bit'],
+			png  => 'y',
+			jp2k => 'y',
+			webp => 'y',
+			heic => 'y',
+			avif => 'y',
+			jxl  => 'y',
+		},
+	},
+	depthmap => {
+		parent => 'features',
+		name => 'depth map',
+		score => {
+			jpeg => 'n',
+			pnm  => 'n',
+			gif  => 'n',
+			png  => 'n',
+			jp2k => 'n',
+			webp => 'n',
+			heic => 'y',
+			avif => 'y',
+			jxl  => 'y',
+		},
+	},
+	overlays => {
+		parent => 'features',
+		name => 'overlays (layers)',
+		score => {
+			jpeg => 'n',
+			pnm  => 'n',
+			gif  => 'y',
+			png  => 'n',
+			jp2k => 'n',
+			webp => 'n',
+			heic => 'y',
+			avif => 'y',
+			jxl  => 'y',
+		},
+	},
+	authoring => {
+		parent => 'features',
+		name => 'authoring workflow suitability',
+		score => {
+			jpeg => 2,
+			pnm  => 2,
+			gif  => 2,
+			png  => 3,
+			jp2k => 3,
+			webp => 2,
+			heic => 2,
+			avif => 2,
+			jxl  => 5,
+		},
+	},
+	reencode => {
+		parent => 'features',
+		name => 'generation loss resilience',
+		score => {
+			jpeg => 4,
+			pnm  => 0,
+			png  => 0,
+			gif  => 0,
+			jp2k => 3,
+			webp => 2,
+			heic => 3,
+			avif => 3,
+			jxl  => 4,
+		},
+	},
+	compat_jpeg => {
+		parent => 'features',
+		name => 'lossless JPEG recompression',
+		score => {
+			jpeg => 0,
+			pnm  => 'n',
+			gif  => 'n',
+			png  => 'n',
+			jp2k => 'n',
+			webp => 'n',
+			heic => 'n',
+			avif => 'n',
+			jxl  => 'y',
+		},
+	},
+	royalties => {
+		name => 'royalty-free',
+		score => {
+			jpeg => 5,
+			pnm  => 5,
+			gif  => [5, undef, 'patented before 2003'],
+			png  => 5,
+			jp2k => [3, undef, 'ISO specification not freely available'],
+			webp => [4, undef, 'free format, low remaining risk of patent trolls'],
+			heic => ['n', undef, 'heavily patented'],
+			avif => [4, undef, 'free format, risk of patent trolls'],
+			jxl  => [4, undef, 'free format, risk of patent trolls'],
+		},
+		children => [],
+	},
+	support => {
+		score => {
+			jpeg => 5,
+			pnm  => [2, undef],
+			gif  => 5,
+			png  => 5,
+			jp2k => [2, undef, 'Apple only'],
+			webp => [4, undef, 'modern browsers'],
+			heic => [1, undef, 'stored by latest cameras, no browser support'],
+			avif => [3, undef, 'all modern browsers except Safari and Edge'],
+			jxl  => [2, undef, 'upcoming in most browsers'],
+		},
+	},
+	overhead => {
+		name => 'container overhead (file size)',
+		score => {
+			png  => [3,  67, 'upto 70 bytes for specific RGBA'],
+			jpeg => [2, 160, '159 bytes minimum for gray, 288 for specific colours'],
+			gif  => [4,  35, '43 bytes for transparent'],
+			webp => [4,  34, 'black or transparent lossless; 44-92 bytes lossy'],
+			bpg  => [4,  31, 'lossy 29-62 bytes, lossless 37-160'],
+			flif => [5,  14, 'black or transparent; 20 bytes for specific RGBA'],
+			pnm  => [5,   8, 'monochrome text PBM; 12 bytes PPM; 69 bytes PAM'],
+			jxl  => [5,  12, '512×256 black pixels'],
+			avif => [1, 282, 'container overhead; 457 bytes with alpha'],
+			jp2k => [2, 123, 'experimental results, likely not optimal'],
+			heic => [1, 386],
+		},
+	},
+},
+}