src/glut/dos/util.c

   1 /*
   2  * DOS/DJGPP Mesa Utility Toolkit
   3  * Version:  1.0
   4  *
   5  * Copyright (C) 2005  Daniel Borca   All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * DANIEL BORCA BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
  21  * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25
  26 #include "internal.h"
  27
  28
  29 extern GLUTStrokeFont glutStrokeRoman, glutStrokeMonoRoman;
  30 extern GLUTBitmapFont glutBitmap8By13, glutBitmap9By15, glutBitmapTimesRoman10, glutBitmapTimesRoman24, glutBitmapHelvetica10, glutBitmapHelvetica12, glutBitmapHelvetica18;
  31
  32 /* To get around the fact that DJGPP DXEs only allow functions
  33    to be exported and no data addresses (as Unix DSOs support), the
  34    GLUT API constants such as GLUT_STROKE_ROMAN have to get passed
  35    through a case statement to get mapped to the actual data structure
  36    address. */
  37 void *
  38 _glut_font (void *font)
  39 {
  40    switch ((int)font) {
  41       case (int)GLUT_STROKE_ROMAN:
  42          return &glutStrokeRoman;
  43       case (int)GLUT_STROKE_MONO_ROMAN:
  44          return &glutStrokeMonoRoman;
  45       case (int)GLUT_BITMAP_9_BY_15:
  46          return &glutBitmap9By15;
  47       case (int)GLUT_BITMAP_8_BY_13:
  48          return &glutBitmap8By13;
  49       case (int)GLUT_BITMAP_TIMES_ROMAN_10:
  50          return &glutBitmapTimesRoman10;
  51       case (int)GLUT_BITMAP_TIMES_ROMAN_24:
  52          return &glutBitmapTimesRoman24;
  53       case (int)GLUT_BITMAP_HELVETICA_10:
  54          return &glutBitmapHelvetica10;
  55       case (int)GLUT_BITMAP_HELVETICA_12:
  56          return &glutBitmapHelvetica12;
  57       case (int)GLUT_BITMAP_HELVETICA_18:
  58          return &glutBitmapHelvetica18;
  59       default:
  60          if ((font == &glutStrokeRoman) ||
  61              (font == &glutStrokeMonoRoman) ||
  62              (font == &glutBitmap9By15) ||
  63              (font == &glutBitmap8By13) ||
  64              (font == &glutBitmapTimesRoman10) ||
  65              (font == &glutBitmapTimesRoman24) ||
  66              (font == &glutBitmapHelvetica10) ||
  67              (font == &glutBitmapHelvetica12) ||
  68              (font == &glutBitmapHelvetica18)) {
  69             return font;
  70          }
  71          _glut_fatal("bad font!");
  72          return NULL;
  73    }
  74 }