cogl-pango/cogl-pango-glyph-cache.h

   1 /*
   2  * Clutter.
   3  *
   4  * An OpenGL based 'interactive canvas' library.
   5  *
   6  * Authored By Matthew Allum  <mallum@openedhand.com>
   7  *
   8  * Copyright (C) 2008 OpenedHand
   9  *
  10  * This library is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU Lesser General Public
  12  * License as published by the Free Software Foundation; either
  13  * version 2 of the License, or (at your option) any later version.
  14  *
  15  * This library is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * Lesser General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU Lesser General Public
  21  * License along with this library. If not, see <http://www.gnu.org/licenses/>.
  22  */
  23
  24 #ifndef __COGL_PANGO_GLYPH_CACHE_H__
  25 #define __COGL_PANGO_GLYPH_CACHE_H__
  26
  27 #include <glib.h>
  28 #include <cogl/cogl.h>
  29 #include <pango/pango-font.h>
  30
  31 G_BEGIN_DECLS
  32
  33 typedef struct _CoglPangoGlyphCache      CoglPangoGlyphCache;
  34 typedef struct _CoglPangoGlyphCacheValue CoglPangoGlyphCacheValue;
  35
  36 struct _CoglPangoGlyphCacheValue
  37 {
  38   CoglTexture *texture;
  39
  40   float tx1;
  41   float ty1;
  42   float tx2;
  43   float ty2;
  44
  45   int tx_pixel;
  46   int ty_pixel;
  47
  48   int draw_x;
  49   int draw_y;
  50   int draw_width;
  51   int draw_height;
  52
  53   /* This will be set to TRUE when the glyph atlas is reorganized
  54      which means the glyph will need to be redrawn */
  55   gboolean   dirty;
  56 };
  57
  58 typedef void (* CoglPangoGlyphCacheDirtyFunc) (PangoFont *font,
  59                                                PangoGlyph glyph,
  60                                                CoglPangoGlyphCacheValue *value);
  61
  62 CoglPangoGlyphCache *
  63 cogl_pango_glyph_cache_new (gboolean use_mipmapping);
  64
  65 void
  66 cogl_pango_glyph_cache_free (CoglPangoGlyphCache *cache);
  67
  68 CoglPangoGlyphCacheValue *
  69 cogl_pango_glyph_cache_lookup (CoglPangoGlyphCache *cache,
  70                                gboolean             create,
  71                                PangoFont           *font,
  72                                PangoGlyph           glyph);
  73
  74 void
  75 cogl_pango_glyph_cache_clear (CoglPangoGlyphCache *cache);
  76
  77 void
  78 _cogl_pango_glyph_cache_add_reorganize_callback (CoglPangoGlyphCache *cache,
  79                                                  GHookFunc func,
  80                                                  void *user_data);
  81
  82 void
  83 _cogl_pango_glyph_cache_remove_reorganize_callback (CoglPangoGlyphCache *cache,
  84                                                     GHookFunc func,
  85                                                     void *user_data);
  86
  87 void
  88 _cogl_pango_glyph_cache_set_dirty_glyphs (CoglPangoGlyphCache *cache,
  89                                           CoglPangoGlyphCacheDirtyFunc func);
  90
  91 G_END_DECLS
  92
  93 #endif /* __COGL_PANGO_GLYPH_CACHE_H__ */