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/* Pango
* pango-fontmap.c: Font handling
*
* Copyright (C) 2000 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 <config.h>
#include "pango-fontmap.h"
#include "pango-utils.h"
#include <stdlib.h>
static PangoFontset *pango_font_map_real_load_fontset (PangoFontMap *fontmap,
PangoContext *context,
const PangoFontDescription *desc,
PangoLanguage *language);
G_DEFINE_TYPE (PangoFontMap, pango_font_map, G_TYPE_OBJECT)
static void
pango_font_map_class_init (PangoFontMapClass *class)
{
class->load_fontset = pango_font_map_real_load_fontset;
}
static void
pango_font_map_init (PangoFontMap *fontmap)
{
}
/**
* pango_font_map_load_font:
* @fontmap: a #PangoFontMap
* @context: the #PangoContext the font will be used with
* @desc: a #PangoFontDescription describing the font to load
*
* Load the font in the fontmap that is the closest match for @desc.
*
* Returns the font loaded, or %NULL if no font matched.
**/
PangoFont *
pango_font_map_load_font (PangoFontMap *fontmap,
PangoContext *context,
const PangoFontDescription *desc)
{
g_return_val_if_fail (fontmap != NULL, NULL);
g_return_val_if_fail (pango_font_description_get_family (desc) != NULL, NULL);
return PANGO_FONT_MAP_GET_CLASS (fontmap)->load_font (fontmap, context, desc);
}
/**
* pango_font_map_list_families:
* @fontmap: a #PangoFontMap
* @families: location to store a pointer to an array of #PangoFontFamily *.
* This array should be freed with g_free().
* @n_families: location to store the number of elements in @families
*
* List all families for a fontmap.
**/
void
pango_font_map_list_families (PangoFontMap *fontmap,
PangoFontFamily ***families,
int *n_families)
{
g_return_if_fail (fontmap != NULL);
PANGO_FONT_MAP_GET_CLASS (fontmap)->list_families (fontmap, families, n_families);
}
/**
* pango_font_map_load_fontset:
* @fontmap: a #PangoFontMap
* @context: the #PangoContext the font will be used with
* @desc: a #PangoFontDescription describing the font to load
* @language: a #PangoLanguage the fonts will be used for
*
* Load a set of fonts in the fontmap that can be used to render
* a font matching @desc.
*
* Returns the fontset, or %NULL if no font matched.
**/
PangoFontset *
pango_font_map_load_fontset (PangoFontMap *fontmap,
PangoContext *context,
const PangoFontDescription *desc,
PangoLanguage *language)
{
g_return_val_if_fail (fontmap != NULL, NULL);
g_return_val_if_fail (pango_font_description_get_family (desc) != NULL, NULL);
return PANGO_FONT_MAP_GET_CLASS (fontmap)->load_fontset (fontmap, context, desc, language);
}
static void
pango_font_map_fontset_add_fonts (PangoFontMap *fontmap,
PangoContext *context,
PangoFontsetSimple *fonts,
PangoFontDescription *desc,
const char *family)
{
char **aliases;
int n_aliases;
int j;
PangoFont *font;
pango_lookup_aliases (family,
&aliases,
&n_aliases);
if (n_aliases)
{
for (j = 0; j < n_aliases; j++)
{
pango_font_description_set_family_static (desc, aliases[j]);
font = pango_font_map_load_font (fontmap, context, desc);
if (font)
pango_fontset_simple_append (fonts, font);
}
}
else
{
pango_font_description_set_family_static (desc, family);
font = pango_font_map_load_font (fontmap, context, desc);
if (font)
pango_fontset_simple_append (fonts, font);
}
}
static PangoFontset *
pango_font_map_real_load_fontset (PangoFontMap *fontmap,
PangoContext *context,
const PangoFontDescription *desc,
PangoLanguage *language)
{
PangoFontDescription *tmp_desc = pango_font_description_copy_static (desc);
char **families;
int i;
PangoFontsetSimple *fonts;
families = g_strsplit (pango_font_description_get_family (desc), ",", -1);
fonts = pango_fontset_simple_new (language);
for (i = 0; families[i]; i++)
pango_font_map_fontset_add_fonts (fontmap,
context,
fonts,
tmp_desc,
families[i]);
g_strfreev (families);
/* The font description was completely unloadable, try with
* family == "Sans"
*/
if (pango_fontset_simple_size (fonts) == 0)
{
char *ctmp1, *ctmp2;
pango_font_description_set_family_static (tmp_desc,
pango_font_description_get_family (desc));
ctmp1 = pango_font_description_to_string (desc);
pango_font_description_set_family_static (tmp_desc, "Sans");
ctmp2 = pango_font_description_to_string (tmp_desc);
g_warning ("Couldn't load font \"%s\" falling back to \"%s\"", ctmp1, ctmp2);
g_free (ctmp1);
g_free (ctmp2);
pango_font_map_fontset_add_fonts (fontmap,
context,
fonts,
tmp_desc,
"Sans");
}
/* We couldn't try with Sans and the specified style. Try Sans Normal
*/
if (pango_fontset_simple_size (fonts) == 0)
{
char *ctmp1, *ctmp2;
pango_font_description_set_family_static (tmp_desc, "Sans");
ctmp1 = pango_font_description_to_string (tmp_desc);
pango_font_description_set_style (tmp_desc, PANGO_STYLE_NORMAL);
pango_font_description_set_weight (tmp_desc, PANGO_WEIGHT_NORMAL);
pango_font_description_set_variant (tmp_desc, PANGO_VARIANT_NORMAL);
pango_font_description_set_stretch (tmp_desc, PANGO_STRETCH_NORMAL);
ctmp2 = pango_font_description_to_string (tmp_desc);
g_warning ("Couldn't load font \"%s\" falling back to \"%s\"", ctmp1, ctmp2);
g_free (ctmp1);
g_free (ctmp2);
pango_font_map_fontset_add_fonts (fontmap,
context,
fonts,
tmp_desc,
"Sans");
}
pango_font_description_free (tmp_desc);
/* Everything failed, we are screwed, there is no way to continue
*/
if (pango_fontset_simple_size (fonts) == 0)
g_critical ("All font fallbacks failed!!!!");
return PANGO_FONTSET (fonts);
}
/**
* pango_font_map_get_shape_engine_type:
* @fontmap: a #PangoFontMap
*
* Returns the render ID for shape engines for this fontmap.
* See the <structfield>render_type</structfield> field of
* #PangoEngineInfo.
*
* Return value: the ID string for shape engines for
* this fontmap. Owned by Pango, should not be modified
* or freed.
*
* Since: 1.4
**/
const char *
pango_font_map_get_shape_engine_type (PangoFontMap *fontmap)
{
g_return_val_if_fail (PANGO_IS_FONT_MAP (fontmap), NULL);
return PANGO_FONT_MAP_GET_CLASS (fontmap)->shape_engine_type;
}
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