code.delx.au - gnu-emacs/blob - src/w32bdf.h

   1 /* Definitions and header for handling BDF fonts on the Microsoft W32 API.
   2    Copyright (C) 1999, 2002, 2003, 2004, 2005,
   3                  2006 Free Software Foundation, Inc.
   4
   5 This file is part of GNU Emacs.
   6
   7 GNU Emacs is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GNU Emacs is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU Emacs; see the file COPYING.  If not, write to
  19 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  20 Boston, MA 02110-1301, USA.  */
  21
  22 /* Based heavily on code by H. Miyashita for Meadow (a descendant of
  23    MULE for W32). */
  24
  25 #ifndef EMACS_W32BDF_H
  26 #define EMACS_W32BDF_H
  27
  28 #define BDF_FIRST_OFFSET_TABLE 0x200
  29 #define BDF_SECOND_OFFSET_TABLE 0x80
  30 #define BDF_SECOND_OFFSET(x) ((x) & 0x7f)
  31 #define BDF_FIRST_OFFSET(x) (((x) >> 8) | (((x) & 0x80) << 1))
  32 #define BDF_CODEPOINT_MAX (BDF_FIRST_OFFSET_TABLE * BDF_SECOND_OFFSET_TABLE)
  33 #define BDF_CODEPOINT_RANGE_COVER_P(x) (((x) >= 0) && ((x) <= BDF_CODEPOINT_MAX))
  34
  35 #define BDF_FONT_CACHE_SIZE 3000
  36 #define BDF_FONT_CLEAR_SIZE 600
  37
  38 /*
  39    GLYPH METRIC (# ... character's reference point)
  40    ^
  41  y |              (urx, ury)
  42    |  ^ +----------------+
  43  a | b| |character       | <- font bounding Box
  44  x | b| |                |
  45  i | h| | #(bbox, bboy)  |
  46  s |  v +----------------+
  47    |   (llx, lly)
  48    |    <---------------->
  49    |           bbw
  50    +----------------------->
  51    origin     x axis
  52  */
  53
  54
  55
  56 /* Structure of glyph information of one character.  */
  57 typedef struct
  58 {
  59   int dwidth;                   /* width in pixels */
  60   int bbw, bbh, bbox, bboy;     /* bounding box in pixels */
  61 } glyph_metric;
  62
  63 typedef struct
  64 {
  65   glyph_metric metric;
  66   int row_byte_size;            /* size in bytes occupied by one row of the bitmap */
  67   int bitmap_size;              /* size in bytes of the following slots */
  68   unsigned char *bitmap;        /*  */
  69 } glyph_struct;
  70
  71 typedef struct fchar *pfont_char;
  72
  73 typedef struct
  74 {
  75   glyph_metric metric;
  76   pfont_char psrc;
  77   int row_byte_size;
  78   int bitmap_size;
  79   unsigned char *pbmp;
  80 } cache_bitmap;
  81
  82 typedef struct fchar
  83 {
  84   unsigned char *offset;
  85   cache_bitmap *pcbmp;
  86 } font_char;
  87
  88 typedef struct
  89 {
  90   char *filename;
  91   HANDLE hfile;
  92   HANDLE hfilemap;
  93   unsigned char *font;
  94   unsigned char *seeked;
  95   DWORD size;
  96   font_char *chtbl[BDF_FIRST_OFFSET_TABLE];
  97   int llx, lly, urx, ury;       /* Font bounding box */
  98
  99   int yoffset;
 100   int relative_compose;
 101   int default_ascent;
 102
 103   unsigned char *registry;
 104   unsigned char *encoding;
 105   unsigned char *slant;
 106 /*  unsigned char *width; */
 107
 108   int width;
 109   int height;
 110   int pixsz;
 111   int nchars;
 112 } bdffont;
 113
 114 #define BDF_FILE_SIZE_MAX 256*1024*1024 /* 256Mb */
 115 #define BDF_FONT_FILE(font) (((bdffont*)(font))->filename)
 116 #define MAKELENDSHORT(c1, c2) (unsigned short)((c1) | ((c2) << 8))
 117
 118 bdffont *w32_init_bdf_font (char *filename);
 119 void w32_free_bdf_font (bdffont *fontp);
 120 int w32_get_bdf_glyph (bdffont *fontp, int index, int size,
 121                        glyph_struct *glyph);
 122 int w32_BDF_TextOut (bdffont *fontp, HDC hdc, int left,
 123                      int top, unsigned char *text, int dim,
 124                      int bytelen, int fixed_pitch_size);
 125 int w32_BDF_to_x_font (char *file, char* xstr, int len);
 126
 127 #endif  /* EMACS_W32BDF_H */
 128
 129 /* arch-tag: 7499e9f2-197e-44cc-9274-373f00b51eec
 130    (do not change this comment) */