src/w32bdf.h

   1 /* Definitions and header for handling BDF fonts on the Microsoft W32 API.
   2    Copyright (C) 1999 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Emacs.
   5
   6 GNU Emacs is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU Emacs is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Emacs; see the file COPYING.  If not, write to
  18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, USA.  */
  20
  21 /* Based heavily on code by H. Miyashita for Meadow (a descendant of
  22    MULE for W32). */
  23
  24 #ifndef EMACS_W32BDF_H
  25 #define EMACS_W32BDF_H
  26
  27 #define BDF_FIRST_OFFSET_TABLE 0x200
  28 #define BDF_SECOND_OFFSET_TABLE 0x80
  29 #define BDF_SECOND_OFFSET(x) ((x) & 0x7f)
  30 #define BDF_FIRST_OFFSET(x) (((x) >> 8) | (((x) & 0x80) << 1))
  31 #define BDF_CODEPOINT_MAX (BDF_FIRST_OFFSET_TABLE * BDF_SECOND_OFFSET_TABLE)
  32 #define BDF_CODEPOINT_RANGE_COVER_P(x) (((x) >= 0) && ((x) <= BDF_CODEPOINT_MAX))
  33
  34 #define BDF_FONT_CACHE_SIZE 3000
  35 #define BDF_FONT_CLEAR_SIZE 600
  36
  37 /*
  38    GLYPH METRIC (# ... character's reference point)
  39    ^
  40  y |              (urx, ury)
  41    |  ^ +----------------+
  42  a | b| |character       | <- font bounding Box
  43  x | b| |                |
  44  i | h| | #(bbox, bboy)  |
  45  s |  v +----------------+
  46    |   (llx, lly)
  47    |    <---------------->
  48    |           bbw
  49    +----------------------->
  50    origin     x axis
  51  */
  52
  53
  54
  55 /* Structure of glyph information of one character.  */
  56 typedef struct
  57 {
  58   int dwidth;                   /* width in pixels */
  59   int bbw, bbh, bbox, bboy;     /* bounding box in pixels */
  60 } glyph_metric;
  61
  62 typedef struct
  63 {
  64   glyph_metric metric;
  65   int row_byte_size;            /* size in bytes occupied by one row of the bitmap */
  66   int bitmap_size;              /* size in bytes of the following slots */
  67   unsigned char *bitmap;        /*  */
  68 } glyph_struct;
  69
  70 typedef struct fchar *pfont_char;
  71
  72 typedef struct
  73 {
  74   glyph_metric metric;
  75   pfont_char psrc;
  76   int row_byte_size;
  77   int bitmap_size;
  78   unsigned char *pbmp;
  79 } cache_bitmap;
  80
  81 typedef struct fchar
  82 {
  83   unsigned char *offset;
  84   cache_bitmap *pcbmp;
  85 } font_char;
  86
  87 typedef struct
  88 {
  89   char *filename;
  90   HANDLE hfile;
  91   HANDLE hfilemap;
  92   unsigned char *font;
  93   unsigned char *seeked;
  94   DWORD size;
  95   font_char *chtbl[BDF_FIRST_OFFSET_TABLE];
  96   int llx, lly, urx, ury;       /* Font bounding box */
  97
  98   int yoffset;
  99   int relative_compose;
 100   int default_ascent;
 101
 102   unsigned char *registry;
 103   unsigned char *encoding;
 104   unsigned char *slant;
 105 /*  unsigned char *width; */
 106
 107   int width;
 108   int height;
 109   int pixsz;
 110   int nchars;
 111 } bdffont;
 112
 113 #define BDF_FILE_SIZE_MAX 256*1024*1024 /* 256Mb */
 114 #define BDF_FONT_FILE(font) (((bdffont*)(font))->filename)
 115 #define MAKELENDSHORT(c1, c2) (unsigned short)((c1) | ((c2) << 8))
 116
 117 bdffont *w32_init_bdf_font (char *filename);
 118 void w32_free_bdf_font (bdffont *fontp);
 119 int w32_get_bdf_glyph (bdffont *fontp, int index, int size,
 120                        glyph_struct *glyph);
 121 int w32_BDF_TextOut (bdffont *fontp, HDC hdc, int left,
 122                      int top, unsigned char *text, int dim,
 123                      int bytelen, int fixed_pitch_size);
 124 int w32_BDF_to_x_font (char *file, char* xstr, int len);
 125
 126 #endif  /* EMACS_W32BDF_H */