Pango is a library for layout and rendering of text, with an emphasis on internationalization. Pang

				/* Pango				 * pangocairo-fontmap.c: Cairo font handling, fontconfig backend				 *				 * Copyright (C) 2000-2005 Red Hat Software				 *				 * This library is free software; you can redistribute it and/or				 * modify it under the terms of the GNU Library General Public				 * License as published by the Free Software Foundation; either				 * version 2 of the License, or (at your option) any later version.				 *				 * This library 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				 * Library General Public License for more details.				 *				 * You should have received a copy of the GNU Library General Public				 * License along with this library; if not, write to the				 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,				 * Boston, MA 02111-1307, USA.				 */				#include 				#include 								#include "pangofc-fontmap.h"				#include "pangocairo.h"				#include "pangocairo-private.h"				#include "pangocairo-fc.h"								typedef struct _PangoCairoFcFontMapClass PangoCairoFcFontMapClass;								struct _PangoCairoFcFontMapClass				{				  PangoFcFontMapClass parent_class;				};								static void				pango_cairo_fc_font_map_set_resolution (PangoCairoFontMap *cfontmap,									double             dpi)				{				  PangoCairoFcFontMap *cffontmap = (PangoCairoFcFontMap *) (cfontmap);								  cffontmap->dpi = dpi;								  pango_fc_font_map_cache_clear ((PangoFcFontMap *) (cfontmap));				}								static double				pango_cairo_fc_font_map_get_resolution_cairo (PangoCairoFontMap *cfontmap)				{				  PangoCairoFcFontMap *cffontmap = (PangoCairoFcFontMap *) (cfontmap);								  return cffontmap->dpi;				}								static cairo_font_type_t				pango_cairo_fc_font_map_get_font_type (PangoCairoFontMap *cfontmap)				{				  return CAIRO_FONT_TYPE_FT;				}								static void				cairo_font_map_iface_init (PangoCairoFontMapIface *iface)				{				  iface->set_resolution = pango_cairo_fc_font_map_set_resolution;				  iface->get_resolution = pango_cairo_fc_font_map_get_resolution_cairo;				  iface->get_font_type  = pango_cairo_fc_font_map_get_font_type;				}								G_DEFINE_TYPE_WITH_CODE (PangoCairoFcFontMap, pango_cairo_fc_font_map, PANGO_TYPE_FC_FONT_MAP,				    { G_IMPLEMENT_INTERFACE (PANGO_TYPE_CAIRO_FONT_MAP, cairo_font_map_iface_init) })								static void				pango_cairo_fc_font_map_finalize (GObject *object)				{				  PangoCairoFcFontMap *cffontmap = (PangoCairoFcFontMap *) (object);								  FT_Done_FreeType (cffontmap->library);								  G_OBJECT_CLASS (pango_cairo_fc_font_map_parent_class)->finalize (object);				}								static void				pango_cairo_fc_font_map_context_substitute (PangoFcFontMap *fcfontmap,									    PangoContext   *context,									    FcPattern      *pattern)				{				  FcConfigSubstitute (NULL, pattern, FcMatchPattern);								  if (context)				    cairo_ft_font_options_substitute (_pango_cairo_context_get_merged_font_options (context),								      pattern);								  FcDefaultSubstitute (pattern);				}								static double				pango_cairo_fc_font_map_get_resolution_fc (PangoFcFontMap *fcfontmap,									   PangoContext   *context)				{				  PangoCairoFcFontMap *cffontmap = (PangoCairoFcFontMap *) (fcfontmap);				  double dpi;								  if (context)				    {				      dpi = pango_cairo_context_get_resolution (context);								      if (dpi 					dpi = cffontmap->dpi;				    }				  else				    dpi = cffontmap->dpi;								  return dpi;				}								static gconstpointer				pango_cairo_fc_font_map_context_key_get (PangoFcFontMap *fcfontmap,									 PangoContext   *context)				{				  return _pango_cairo_context_get_merged_font_options (context);				}								static gpointer				pango_cairo_fc_font_map_context_key_copy (PangoFcFontMap *fcfontmap,									  gconstpointer   key)				{				  return cairo_font_options_copy (key);				}								static void				pango_cairo_fc_font_map_context_key_free (PangoFcFontMap *fcfontmap,									  gpointer        key)				{				  cairo_font_options_destroy (key);				}												static guint32				pango_cairo_fc_font_map_context_key_hash (PangoFcFontMap *fcfontmap,									  gconstpointer        key)				{				  return (guint32)cairo_font_options_hash (key);				}								static gboolean				pango_cairo_fc_font_map_context_key_equal (PangoFcFontMap *fcfontmap,									   gconstpointer   key_a,									   gconstpointer   key_b)				{				  return cairo_font_options_equal (key_a, key_b);				}								static PangoFcFont *				pango_cairo_fc_font_map_create_font (PangoFcFontMap             *fcfontmap,								     PangoContext               *context,								     const PangoFontDescription *desc,								     FcPattern                  *pattern)				{				  return _pango_cairo_fc_font_new ((PangoCairoFcFontMap *) (fcfontmap),								   context, desc, pattern);				}								static void				pango_cairo_fc_font_map_class_init (PangoCairoFcFontMapClass *class)				{				  GObjectClass *gobject_class = G_OBJECT_CLASS (class);				  PangoFcFontMapClass *fcfontmap_class = PANGO_FC_FONT_MAP_CLASS (class);								  gobject_class->finalize  = pango_cairo_fc_font_map_finalize;								  fcfontmap_class->context_substitute = pango_cairo_fc_font_map_context_substitute;				  fcfontmap_class->get_resolution = pango_cairo_fc_font_map_get_resolution_fc;								  fcfontmap_class->context_key_get = pango_cairo_fc_font_map_context_key_get;				  fcfontmap_class->context_key_copy = pango_cairo_fc_font_map_context_key_copy;				  fcfontmap_class->context_key_free = pango_cairo_fc_font_map_context_key_free;				  fcfontmap_class->context_key_hash = pango_cairo_fc_font_map_context_key_hash;				  fcfontmap_class->context_key_equal = pango_cairo_fc_font_map_context_key_equal;								  fcfontmap_class->create_font = pango_cairo_fc_font_map_create_font;				}								static void				pango_cairo_fc_font_map_init (PangoCairoFcFontMap *cffontmap)				{				  FT_Error error;								  cffontmap->library = NULL;				  error = FT_Init_FreeType (&cffontmap->library);				  if (error != FT_Err_Ok)				    g_critical ("pango_cairo_font_map_init: Could not initialize freetype");								  cffontmap->dpi   = 96.0;				}								FT_Library				_pango_cairo_fc_font_map_get_library (PangoCairoFcFontMap *fontmap)				{				  g_return_val_if_fail (PANGO_IS_CAIRO_FC_FONT_MAP (fontmap), NULL);								  return fontmap->library;				}