write_type_one_font.json

Le fichier JSON de l’exemple « Une page composée dans une police de 1990 ». Une police du plus ancien format d’Adobe, celle qu’une imprimerie achetait il y a vingt ans et que presque plus rien ne lit, réduite aux lettres que la page trace. Chaque chiffre que la page énonce à son sujet a été lu dans la police elle-même.

JSON 533 lignes

Ce fichier est une requête : une application l’envoie par le réseau au serveur, qui crée le PDF et le renvoie. Il crée la même page que les versions Rust et Python de cet exemple. Une requête nomme chaque fichier qu’elle emploie, jamais le contenu de ces fichiers ; l’appel transmet la requête et les fichiers ensemble. Une police que le serveur détient déjà, comme DejaVuSans, se nomme sans rien y joindre. Envoyez la requête à l’adresse que donne la page de l’API.

La requête contient la police elle-même, qui est une police propre au client : c’est donc la seule paire du site rendue pour un client autorisé à en envoyer une. Chaque chiffre que la page énonce sur cette police, la bibliothèque le lit dans la police au fil du travail — le nom qu’elle se donne, le fait qu’elle contient 62 formes dont 61 sont atteignables par un code, le rectangle qu’elle énonce, l’épaisseur de ses traits et à quelle profondeur sous la ligne elle veut un soulignement — et la requête les répète sous forme de chiffres écrits dedans. Deux poids les accompagnent : ce que la police pèse sur le disque et ce que pèse un document jetable que la bibliothèque écrit pour la peser. Tous bougent dès que la police est reconstruite ; ici ils sont saisis à la main, et il faudrait les ressaisir. Sur la seconde page, la requête recopie de la même façon ce que la bibliothèque lit dans la police forme par forme — sa matrice, son inclinaison et, pour chaque caractère d’une ligne, son code, sa forme et de combien il avance — ainsi que les deux largeurs que prend cette ligne. La ligne elle-même, que cette page compose deux fois dans la police, une fois aux largeurs que la police indique et une fois avec un fichier de métriques posé par-dessus qui élargit chaque forme d’un quart, n’est pas dans la requête : sa seconde page n’a rien là où se trouvent ces deux lignes. La bibliothèque pose aussi un gris avant la note de fin puis indique du noir dans la note elle-même, si bien que le gris ne peint rien ; la requête n’indique aucune couleur à cet endroit et trace la même page avec une instruction de moins.

À quoi sert cet exemple

Une imprimerie qui achète des polices depuis vingt ans détient une collection au premier format de police d’Adobe, achetée et payée, que presque plus rien ne lit. La remplacer, c’est racheter les mêmes polices et accepter qu’un retirage ne corresponde pas tout à fait au tirage d’origine. Ce moteur lit cette collection : elle continue donc de servir au lieu de devenir une raison de ne rien changer.

Ce que montre cet exemple

Télécharger le fichier Le même exemple en Rust Le même exemple en Python Voir ce qu’il crée 
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{
  "type1_fonts": [
    {
      "name": "stroke",
      "part": "HqfStroke.pfb",
      "metrics": "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"
    },
    {
      "name": "stroke_bare",
      "part": "HqfStroke.pfb"
    },
    {
      "name": "stroke_widened",
      "part": "HqfStroke.pfb",
      "metrics": "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"
    }
  ],
  "font_variants": [
    {
      "name": "stroke_kerned",
      "from": "stroke",
      "kerning": true
    }
  ],
  "items": [
    {
      "type": "flow",
      "rect": {
        "llx": 72.0,
        "lly": 702.4,
        "urx": 672.0,
        "ury": 738.4
      },
      "content": "A page set in a Type 1 font",
      "font": "DejaVuSans",
      "font_size": 18.0,
      "first_baseline": {
        "points": 0
      },
      "pages": [
        1
      ]
    },
    {
      "type": "flow",
      "rect": {
        "llx": 72.0,
        "lly": 628.4,
        "urx": 522.0,
        "ury": 724.4
      },
      "content": "The three lines below are drawn from a font program in Adobe's first format. It is not a font file with tables to look a glyph up in: it is a PostScript program, its glyphs ciphered one by one, and the library reads it to find out which code reaches each of them. Each glyph is set as wide as the text metrics file that comes with the program says, or, without one, as the program itself says. The program is then carried into this file cut down to the glyphs this page draws, and reading software draws them from those very bytes.",
      "font": "DejaVuSans",
      "font_size": 10.0,
      "leading": 12.0,
      "pages": [
        1
      ]
    },
    {
      "type": "flow",
      "rect": {
        "llx": 72.0,
        "lly": 578.0,
        "urx": 672.0,
        "ury": 602.0
      },
      "content": "Drawn from the program",
      "font": "DejaVuSans",
      "font_size": 12.0,
      "first_baseline": {
        "points": 0
      },
      "pages": [
        1
      ]
    },
    {
      "type": "flow",
      "rect": {
        "llx": 72.0,
        "lly": 540.0,
        "urx": 672.0,
        "ury": 570.0
      },
      "content": "HQF DEVELOPMENT",
      "font": "stroke",
      "font_size": 15.0,
      "first_baseline": {
        "points": 0
      },
      "pages": [
        1
      ]
    },
    {
      "type": "flow",
      "rect": {
        "llx": 72.0,
        "lly": 512.0,
        "urx": 672.0,
        "ury": 542.0
      },
      "content": "ABCDEFGHIJKLM NOPQRSTUVWXYZ 0123456789",
      "font": "stroke",
      "font_size": 15.0,
      "first_baseline": {
        "points": 0
      },
      "pages": [
        1
      ]
    },
    {
      "type": "flow",
      "rect": {
        "llx": 72.0,
        "lly": 484.0,
        "urx": 672.0,
        "ury": 514.0
      },
      "content": "A STROKE FACE, READ AND CUT TO SIZE.",
      "font": "stroke",
      "font_size": 15.0,
      "first_baseline": {
        "points": 0
      },
      "pages": [
        1
      ]
    },
    {
      "type": "flow",
      "rect": {
        "llx": 72.0,
        "lly": 451.6,
        "urx": 672.0,
        "ury": 475.6
      },
      "content": "What the program states about itself",
      "font": "DejaVuSans",
      "font_size": 12.0,
      "first_baseline": {
        "points": 0
      },
      "pages": [
        1
      ]
    },
    {
      "type": "flow",
      "rect": {
        "llx": 72.0,
        "lly": 405.6,
        "urx": 522.0,
        "ury": 465.6
      },
      "content": "It calls itself HqfStroke and holds 62 glyphs, of which 61 are reached by a code. Every glyph stands in one box, whose corners are 34 · -238 and 647 · 967; a vertical stem is 80 thousandths of an em thick, and an underline sits 120 below the line. Not one of those figures is written into this page: each is read out of the program.",
      "font": "DejaVuSans",
      "font_size": 10.0,
      "leading": 12.0,
      "pages": [
        1
      ]
    },
    {
      "type": "flow",
      "rect": {
        "llx": 72.0,
        "lly": 359.2,
        "urx": 672.0,
        "ury": 383.2
      },
      "content": "What it weighs",
      "font": "DejaVuSans",
      "font_size": 12.0,
      "first_baseline": {
        "points": 0
      },
      "pages": [
        1
      ]
    },
    {
      "type": "flow",
      "rect": {
        "llx": 72.0,
        "lly": 325.2,
        "urx": 522.0,
        "ury": 373.2
      },
      "content": "The program itself is 8 117 bytes on disk, and a page setting the three lines above in it weighs 6 859 bytes, the program cut down to the glyphs those lines draw. Both figures are measured by the program that created this page, not written in by hand.",
      "font": "DejaVuSans",
      "font_size": 10.0,
      "leading": 12.0,
      "pages": [
        1
      ]
    },
    {
      "type": "flow",
      "rect": {
        "llx": 72.0,
        "lly": 278.8,
        "urx": 672.0,
        "ury": 302.8
      },
      "content": "What travels with it",
      "font": "DejaVuSans",
      "font_size": 12.0,
      "first_baseline": {
        "points": 0
      },
      "pages": [
        1
      ]
    },
    {
      "type": "flow",
      "rect": {
        "llx": 72.0,
        "lly": 148.8,
        "urx": 522.0,
        "ury": 292.8
      },
      "content": "Like every other kind of font this library carries, a Type 1 program travels light: only the glyphs a page actually draws go into the file, so a page that says one word carries the letters of that word and not a whole alphabet. The format makes that a piece of work of its own: each glyph is ciphered on its own inside the program, so the library deciphers the program, rewrites its list of glyphs to hold only .notdef, the glyphs drawn and the glyphs an accented letter is built from, and ciphers it again. Each glyph kept is copied byte for byte, still under its own cipher, and the pieces of outline several glyphs share are kept whole. The font's description then names every glyph the file holds. On a face of a few dozen glyphs that saves little; on a large one it is most of the program: a face of sixty thousand bytes set in three words carries the glyphs of those three words and not the rest.",
      "font": "DejaVuSans",
      "font_size": 10.0,
      "leading": 12.0,
      "pages": [
        1
      ]
    },
    {
      "type": "flow",
      "rect": {
        "llx": 72.0,
        "lly": 97.6,
        "urx": 522.0,
        "ury": 140.8
      },
      "content": "A Type 1 font is a simple font: its codes are one byte, so at most 256 of its glyphs are reachable at a time and it never sets text down the page. Which code reaches which glyph is the program's own business — this file repeats the program's own names for them.",
      "font": "DejaVuSans",
      "font_size": 9.0,
      "leading": 10.8,
      "pages": [
        1
      ]
    },
    {
      "type": "flow",
      "rect": {
        "llx": 72.0,
        "lly": 702.4,
        "urx": 672.0,
        "ury": 738.4
      },
      "content": "The program, glyph by glyph",
      "font": "DejaVuSans",
      "font_size": 18.0,
      "first_baseline": {
        "points": 0
      },
      "pages": [
        2
      ]
    },
    {
      "type": "flow",
      "rect": {
        "llx": 72.0,
        "lly": 688.4,
        "urx": 522.0,
        "ury": 724.4
      },
      "content": "Its matrix is [0.001 0 0 0.001 0 0]; it slants 0°; each glyph has a width of its own; it spells out its own codes, 61 of them.",
      "font": "DejaVuSans",
      "font_size": 10.0,
      "leading": 12.0,
      "pages": [
        2
      ]
    },
    {
      "type": "flow",
      "rect": {
        "llx": 72.0,
        "lly": 658.0,
        "urx": 672.0,
        "ury": 677.0
      },
      "content": "H is reached by code 72, the glyph H, which advances 680",
      "font": "DejaVuSans",
      "font_size": 9.5,
      "first_baseline": {
        "points": 0
      },
      "pages": [
        2
      ]
    },
    {
      "type": "flow",
      "rect": {
        "llx": 72.0,
        "lly": 644.6,
        "urx": 672.0,
        "ury": 663.6
      },
      "content": "Q is reached by code 81, the glyph Q, which advances 680",
      "font": "DejaVuSans",
      "font_size": 9.5,
      "first_baseline": {
        "points": 0
      },
      "pages": [
        2
      ]
    },
    {
      "type": "flow",
      "rect": {
        "llx": 72.0,
        "lly": 631.2,
        "urx": 672.0,
        "ury": 650.2
      },
      "content": "F is reached by code 70, the glyph F, which advances 680",
      "font": "DejaVuSans",
      "font_size": 9.5,
      "first_baseline": {
        "points": 0
      },
      "pages": [
        2
      ]
    },
    {
      "type": "flow",
      "rect": {
        "llx": 72.0,
        "lly": 617.8,
        "urx": 672.0,
        "ury": 636.8
      },
      "content": "2 is reached by code 50, the glyph two, which advances 680",
      "font": "DejaVuSans",
      "font_size": 9.5,
      "first_baseline": {
        "points": 0
      },
      "pages": [
        2
      ]
    },
    {
      "type": "flow",
      "rect": {
        "llx": 72.0,
        "lly": 604.4,
        "urx": 672.0,
        "ury": 623.4
      },
      "content": "0 is reached by code 48, the glyph zero, which advances 680",
      "font": "DejaVuSans",
      "font_size": 9.5,
      "first_baseline": {
        "points": 0
      },
      "pages": [
        2
      ]
    },
    {
      "type": "flow",
      "rect": {
        "llx": 72.0,
        "lly": 591.0,
        "urx": 672.0,
        "ury": 610.0
      },
      "content": "3 is reached by code 51, the glyph three, which advances 680",
      "font": "DejaVuSans",
      "font_size": 9.5,
      "first_baseline": {
        "points": 0
      },
      "pages": [
        2
      ]
    },
    {
      "type": "flow",
      "rect": {
        "llx": 72.0,
        "lly": 577.6,
        "urx": 672.0,
        "ury": 596.6
      },
      "content": "8 is reached by code 56, the glyph eight, which advances 680",
      "font": "DejaVuSans",
      "font_size": 9.5,
      "first_baseline": {
        "points": 0
      },
      "pages": [
        2
      ]
    },
    {
      "type": "flow",
      "rect": {
        "llx": 72.0,
        "lly": 530.6,
        "urx": 672.0,
        "ury": 560.6
      },
      "content": "HQF 2038",
      "font": "stroke_bare",
      "font_size": 15.0,
      "first_baseline": {
        "points": 0
      },
      "pages": [
        2
      ]
    },
    {
      "type": "flow",
      "rect": {
        "llx": 72.0,
        "lly": 504.6,
        "urx": 672.0,
        "ury": 534.6
      },
      "content": "HQF 2038",
      "font": "stroke_widened",
      "font_size": 15.0,
      "first_baseline": {
        "points": 0
      },
      "pages": [
        2
      ]
    },
    {
      "type": "flow",
      "rect": {
        "llx": 72.0,
        "lly": 470.6,
        "urx": 522.0,
        "ury": 518.6
      },
      "content": "The line above is set once from the widths the program states, and once with a metrics file written over it that widens every glyph by a quarter: at 15 points it runs 76.8 points, then 96.0.",
      "font": "DejaVuSans",
      "font_size": 10.0,
      "leading": 12.0,
      "pages": [
        2
      ]
    },
    {
      "type": "flow",
      "rect": {
        "llx": 72.0,
        "lly": 721.6,
        "urx": 672.0,
        "ury": 745.6
      },
      "content": "Kerned from its metrics file",
      "font": "DejaVuSans",
      "font_size": 12.0,
      "first_baseline": {
        "points": 0
      },
      "pages": [
        3
      ]
    },
    {
      "type": "flow",
      "rect": {
        "llx": 72.0,
        "lly": 683.6,
        "urx": 672.0,
        "ury": 713.6
      },
      "content": "AT AV AW AY FA LT LV LW LY PA TA VA WA YA",
      "font": "stroke",
      "font_size": 15.0,
      "first_baseline": {
        "points": 0
      },
      "pages": [
        3
      ]
    },
    {
      "type": "flow",
      "rect": {
        "llx": 72.0,
        "lly": 655.6,
        "urx": 672.0,
        "ury": 685.6
      },
      "content": "AT AV AW AY FA LT LV LW LY PA TA VA WA YA",
      "font": "stroke_kerned",
      "font_size": 15.0,
      "first_baseline": {
        "points": 0
      },
      "pages": [
        3
      ]
    },
    {
      "type": "flow",
      "rect": {
        "llx": 72.0,
        "lly": 593.6,
        "urx": 522.0,
        "ury": 665.6
      },
      "content": "The same pairs twice: the first line is set without kerning, the second kerned on the pairs of the text metrics file the library reads beside the program. Each pair whose facing sides slant or stand open is brought together, by as much as a quarter of an em, and the move is written into the line itself, so every reader draws the letters where they were set.",
      "font": "DejaVuSans",
      "font_size": 10.0,
      "leading": 12.0,
      "pages": [
        3
      ]
    }
  ]
}