/usr/share/common-lisp/source/zpb-ttf/hhea.lisp is in cl-zpb-ttf 0.7-2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 | ;;; Copyright (c) 2006 Zachary Beane, All Rights Reserved
;;;
;;; Redistribution and use in source and binary forms, with or without
;;; modification, are permitted provided that the following conditions
;;; are met:
;;;
;;; * Redistributions of source code must retain the above copyright
;;; notice, this list of conditions and the following disclaimer.
;;;
;;; * Redistributions in binary form must reproduce the above
;;; copyright notice, this list of conditions and the following
;;; disclaimer in the documentation and/or other materials
;;; provided with the distribution.
;;;
;;; THIS SOFTWARE IS PROVIDED BY THE AUTHOR 'AS IS' AND ANY EXPRESSED
;;; OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
;;; WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
;;; ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
;;; DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
;;; DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
;;; GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
;;; INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
;;; WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
;;; NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
;;; SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
;;;
;;; Loading data from the "hhea" table.
;;;
;;; http://www.microsoft.com/OpenType/OTSpec/hhea.htm
;;; http://developer.apple.com/fonts/TTRefMan/RM06/Chap6hhea.html
;;;
;;; hhea.lisp,v 1.4 2006/02/18 23:13:43 xach Exp
(in-package #:zpb-ttf)
(defmethod load-hhea-info ((font-loader font-loader))
(seek-to-table "hhea" font-loader)
(with-slots (input-stream ascender descender line-gap)
font-loader
(let ((version (read-fixed input-stream)))
(check-version "\"hhea\" table" version #x00010000))
(setf ascender (read-fword input-stream)
descender (read-fword input-stream)
line-gap (read-fword input-stream))))
(defmethod horizontal-metrics-count ((font-loader font-loader))
(seek-to-table "hhea" font-loader)
(with-slots (input-stream) font-loader
;; Skip to the end, since all we care about is the last item
(advance-file-position input-stream 34)
(read-uint16 input-stream)))
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