bounding-box.lisp

   1 ;;; Copyright (c) 2006 Zachary Beane, All Rights Reserved
   2 ;;;
   3 ;;; Redistribution and use in source and binary forms, with or without
   4 ;;; modification, are permitted provided that the following conditions
   5 ;;; are met:
   6 ;;;
   7 ;;;   * Redistributions of source code must retain the above copyright
   8 ;;;     notice, this list of conditions and the following disclaimer.
   9 ;;;
  10 ;;;   * Redistributions in binary form must reproduce the above
  11 ;;;     copyright notice, this list of conditions and the following
  12 ;;;     disclaimer in the documentation and/or other materials
  13 ;;;     provided with the distribution.
  14 ;;;
  15 ;;; THIS SOFTWARE IS PROVIDED BY THE AUTHOR 'AS IS' AND ANY EXPRESSED
  16 ;;; OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  17 ;;; WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  18 ;;; ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  19 ;;; DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  20 ;;; DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
  21 ;;; GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  22 ;;; INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  23 ;;; WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  24 ;;; NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  25 ;;; SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26 ;;;;
  27 ;;;; Bounding boxes, which are common to both the overall font and
  28 ;;;; individual glyphs.
  29 ;;;;
  30 ;;;; $Id: bounding-box.lisp,v 1.2 2006/02/18 23:13:43 xach Exp $
  31
  32 (in-package :zpb-ttf)
  33
  34 (defgeneric bounding-box (object))
  35
  36 (macrolet ((bbox-accessor (name index)
  37              `(progn
  38                 (defgeneric ,name (object)
  39                   (:method (object)
  40                     (aref (bounding-box object) ,index)))
  41                 (defgeneric (setf ,name) (new-value object)
  42                   (:method (new-value object)
  43                     (setf (aref (bounding-box object) ,index) new-value))))))
  44   (bbox-accessor xmin 0)
  45   (bbox-accessor ymin 1)
  46   (bbox-accessor xmax 2)
  47   (bbox-accessor ymax 3))
  48
  49 (defmethod bounding-box ((object array))
  50   object)