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/* Shared GDI and Uniscribe Font backend declarations for the W32 API.
Copyright (C) 2007, 2008, 2009 Free Software Foundation, Inc.

This file is part of GNU Emacs.

GNU Emacs is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */

#ifndef EMACS_W32FONT_H
#define EMACS_W32FONT_H


/* Bit 17 of ntmFlags in NEWTEXTMETRIC is set for Postscript OpenType fonts,
bit 18 for Truetype OpenType fonts, bit 20 for Type1 fonts. */
#ifndef NTM_PS_OPENTYPE
#define NTM_PS_OPENTYPE 0x00020000
#endif
#ifndef NTM_TT_OPENTYPE
#define NTM_TT_OPENTYPE 0x00040000
#endif
#ifndef NTM_TYPE1
#define NTM_TYPE1 0x00100000
#endif

#define NTMFLAGS_OPENTYPE (NTM_PS_OPENTYPE | NTM_TT_OPENTYPE)

struct w32_metric_cache
{
  short lbearing, rbearing, width;
  unsigned char status;
};

#define W32METRIC_NO_ATTEMPT 0
#define W32METRIC_SUCCESS 1
#define W32METRIC_FAIL 2

/* The actual structure for a w32 font, that can be cast to struct font.
The Uniscribe backend extends this. */
struct w32font_info
{
  struct font font;
  TEXTMETRICW metrics;
  unsigned int glyph_idx;
  struct w32_metric_cache **cached_metrics;
  int n_cache_blocks;
  HFONT hfont;
};

/* Macros for getting OS specific information from a font struct. */
#define FONT_HANDLE(f) (((struct w32font_info *)(f))->hfont)
#define FONT_TEXTMETRIC(f) (((struct w32font_info *)(f))->metrics)

#define CACHE_BLOCKSIZE 128

Lisp_Object w32font_get_cache P_ ((FRAME_PTR fe));
Lisp_Object w32font_list_internal P_ ((Lisp_Object frame,
                                       Lisp_Object font_spec,
                                       int opentype_only));
Lisp_Object w32font_match_internal P_ ((Lisp_Object frame,
                                        Lisp_Object font_spec,
                                        int opentype_only));
int w32font_open_internal P_ ((FRAME_PTR f, Lisp_Object font_entity,
                               int pixel_size, Lisp_Object font_object));
void w32font_close P_ ((FRAME_PTR f, struct font *font));
int w32font_has_char P_ ((Lisp_Object entity, int c));
int w32font_text_extents P_ ((struct font *font, unsigned *code, int nglyphs,
                              struct font_metrics *metrics));
int w32font_draw P_ ((struct glyph_string *s, int from, int to,
                      int x, int y, int with_background));


int uniscribe_check_otf P_ ((LOGFONT *font, Lisp_Object otf_spec));

Lisp_Object intern_font_name P_ ((char *));

#endif

/* arch-tag: ef9d9675-a2a5-4d01-9526-815e9a3da7cb
(do not change this comment) */
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