src/w32font.h

   1 /* Shared GDI and Uniscribe Font backend declarations for the W32 API.
   2    Copyright (C) 2007, 2008 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 3, 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., 51 Franklin Street, Fifth Floor,
  19 Boston, MA 02110-1301, USA.  */
  20
  21 #ifndef EMACS_W32FONT_H
  22 #define EMACS_W32FONT_H
  23
  24
  25 /* Bit 17 of ntmFlags in NEWTEXTMETRIC is set for Postscript OpenType fonts,
  26    bit 18 for Truetype OpenType fonts, bit 20 for Type1 fonts.  */
  27 #ifndef NTM_PS_OPENTYPE
  28 #define NTM_PS_OPENTYPE 0x00020000
  29 #endif
  30 #ifndef NTM_TT_OPENTYPE
  31 #define NTM_TT_OPENTYPE 0x00040000
  32 #endif
  33 #ifndef NTM_TYPE1
  34 #define NTM_TYPE1 0x00100000
  35 #endif
  36
  37 #define NTMFLAGS_OPENTYPE (NTM_PS_OPENTYPE | NTM_TT_OPENTYPE)
  38
  39 struct w32_metric_cache
  40 {
  41   short lbearing, rbearing, width;
  42   unsigned char status;
  43 };
  44
  45 #define W32METRIC_NO_ATTEMPT 0
  46 #define W32METRIC_SUCCESS 1
  47 #define W32METRIC_FAIL 2
  48
  49 /* The actual structure for a w32 font, that can be cast to struct font.
  50    The Uniscribe backend extends this.  */
  51 struct w32font_info
  52 {
  53   struct font font;
  54   TEXTMETRIC metrics;
  55   unsigned int glyph_idx;
  56   struct w32_metric_cache **cached_metrics;
  57   int n_cache_blocks;
  58 };
  59
  60 #define CACHE_BLOCKSIZE 128
  61
  62 Lisp_Object w32font_get_cache P_ ((FRAME_PTR fe));
  63 Lisp_Object w32font_list_internal P_ ((Lisp_Object frame,
  64                                        Lisp_Object font_spec,
  65                                        int opentype_only));
  66 Lisp_Object w32font_match_internal P_ ((Lisp_Object frame,
  67                                         Lisp_Object font_spec,
  68                                         int opentype_only));
  69 int w32font_open_internal P_ ((FRAME_PTR f, Lisp_Object font_entity,
  70                                int pixel_size, struct w32font_info *w32_font));
  71 void w32font_close P_ ((FRAME_PTR f, struct font *font));
  72 int w32font_has_char P_ ((Lisp_Object entity, int c));
  73 int w32font_text_extents P_ ((struct font *font, unsigned *code, int nglyphs,
  74                               struct font_metrics *metrics));
  75 int w32font_draw P_ ((struct glyph_string *s, int from, int to,
  76                       int x, int y, int with_background));
  77
  78
  79 int uniscribe_check_otf P_ ((LOGFONT *font, Lisp_Object otf_spec));
  80
  81 #endif
  82
  83 /* arch-tag: ef9d9675-a2a5-4d01-9526-815e9a3da7cb
  84    (do not change this comment) */