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35 lines
1.6 KiB
Racket
35 lines
1.6 KiB
Racket
#lang fontkit/racket
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(require restructure)
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(provide (all-defined-out))
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#|
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approximates
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https://github.com/mbutterick/fontkit/blob/master/src/tables/head.js
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|#
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(define-subclass RStruct (Rhead))
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(define head (make-object Rhead
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(dictify
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'version int32be ;; 0x00010000 (version 1.0)
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'revision int32be ;; set by font manufacturer
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'checkSumAdjustment uint32be
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'magicNumber uint32be ;; set to 0x5F0F3CF5
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'flags uint16be
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'unitsPerEm uint16be ;; range from 64 to 16384
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'created (make-object RArray int32be 2)
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'modified (make-object RArray int32be 2)
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'xMin int16be ;; for all glyph bounding boxes
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'yMin int16be ;; for all glyph bounding boxes
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'xMax int16be ;; for all glyph bounding boxes
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'yMax int16be ;; for all glyph bounding boxes
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'macStyle (make-object RBitfield uint16be '(bold italic underline outline shadow condensed extended))
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'lowestRecPPEM uint16be ;; smallest readable size in pixels
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'fontDirectionHint int16be
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'indexToLocFormat int16be ;; 0 for short offsets 1 for long
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'glyphDataFormat int16be ;; 0 for current format
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)))
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