src/w32bdf.h

   1 /* Definitions and header for handling BDF fonts on the Microsoft W32 API.
   2    Copyright (C) 1999, 2001, 2002, 2003, 2004, 2005,
   3                  2006, 2007, 2008  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 3 of the License, or
  10 (at your option) 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.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 /* Based heavily on code by H. Miyashita for Meadow (a descendant of
  21    MULE for W32). */
  22
  23 #ifndef EMACS_W32BDF_H
  24 #define EMACS_W32BDF_H
  25
  26 #define BDF_FIRST_OFFSET_TABLE 0x200
  27 #define BDF_SECOND_OFFSET_TABLE 0x80
  28 #define BDF_SECOND_OFFSET(x) ((x) & 0x7f)
  29 #define BDF_FIRST_OFFSET(x) (((x) >> 8) | (((x) & 0x80) << 1))
  30 #define BDF_CODEPOINT_MAX (BDF_FIRST_OFFSET_TABLE * BDF_SECOND_OFFSET_TABLE)
  31 #define BDF_CODEPOINT_RANGE_COVER_P(x) (((x) >= 0) && ((x) <= BDF_CODEPOINT_MAX))
  32
  33 #define BDF_FONT_CACHE_SIZE 3000
  34 #define BDF_FONT_CLEAR_SIZE 600
  35
  36 /*
  37    GLYPH METRIC (# ... character's reference point)
  38    ^
  39  y |              (urx, ury)
  40    |  ^ +----------------+
  41  a | b| |character       | <- font bounding Box
  42  x | b| |                |
  43  i | h| | #(bbox, bboy)  |
  44  s |  v +----------------+
  45    |   (llx, lly)
  46    |    <---------------->
  47    |           bbw
  48    +----------------------->
  49    origin     x axis
  50  */
  51
  52
  53
  54 /* Structure of glyph information of one character.  */
  55 typedef struct
  56 {
  57   int dwidth;                   /* width in pixels */
  58   int bbw, bbh, bbox, bboy;     /* bounding box in pixels */
  59 } glyph_metric;
  60
  61 typedef struct
  62 {
  63   glyph_metric metric;
  64   int row_byte_size;            /* size in bytes occupied by one row of the bitmap */
  65   int bitmap_size;              /* size in bytes of the following slots */
  66   unsigned char *bitmap;        /*  */
  67 } glyph_struct;
  68
  69 typedef struct fchar *pfont_char;
  70
  71 typedef struct
  72 {
  73   glyph_metric metric;
  74   pfont_char psrc;
  75   int row_byte_size;
  76   int bitmap_size;
  77   unsigned char *pbmp;
  78 } cache_bitmap;
  79
  80 typedef struct fchar
  81 {
  82   unsigned char *offset;
  83   cache_bitmap *pcbmp;
  84 } font_char;
  85
  86 typedef struct
  87 {
  88   char *filename;
  89   HANDLE hfile;
  90   HANDLE hfilemap;
  91   unsigned char *font;
  92   unsigned char *seeked;
  93   DWORD size;
  94   font_char *chtbl[BDF_FIRST_OFFSET_TABLE];
  95   int llx, lly, urx, ury;       /* Font bounding box */
  96
  97   int yoffset;
  98   int relative_compose;
  99   int default_ascent;
 100
 101   unsigned char *registry;
 102   unsigned char *encoding;
 103   unsigned char *slant;
 104 /*  unsigned char *width; */
 105
 106   int width;
 107   int height;
 108   int pixsz;
 109   int nchars;
 110 } bdffont;
 111
 112 #define BDF_FILE_SIZE_MAX 256*1024*1024 /* 256Mb */
 113 #define BDF_FONT_FILE(font) (((bdffont*)(font))->filename)
 114 #define MAKELENDSHORT(c1, c2) (unsigned short)((c1) | ((c2) << 8))
 115
 116 bdffont *w32_init_bdf_font (char *filename);
 117 void w32_free_bdf_font (bdffont *fontp);
 118 int w32_get_bdf_glyph (bdffont *fontp, int index, int size,
 119                        glyph_struct *glyph);
 120 int w32_BDF_TextOut (bdffont *fontp, HDC hdc, int left,
 121                      int top, unsigned char *text, int dim,
 122                      int bytelen, int fixed_pitch_size);
 123 int w32_BDF_to_x_font (char *file, char* xstr, int len);
 124
 125 #endif  /* EMACS_W32BDF_H */
 126
 127 /* arch-tag: 7499e9f2-197e-44cc-9274-373f00b51eec
 128    (do not change this comment) */