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-rw-r--r--trunk/pango/pango-fontmap.c269
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diff --git a/trunk/pango/pango-fontmap.c b/trunk/pango/pango-fontmap.c
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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-impl-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;
+ static GHashTable *warned_fonts = NULL;
+
+ 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");
+
+ if (!warned_fonts || !g_hash_table_lookup (warned_fonts, ctmp1))
+ {
+ if (!warned_fonts)
+ warned_fonts = g_hash_table_new (g_str_hash, g_str_equal);
+
+ g_hash_table_insert (warned_fonts, g_strdup (ctmp1), GINT_TO_POINTER (1));
+
+ ctmp2 = pango_font_description_to_string (tmp_desc);
+ g_warning ("couldn't load font \"%s\", falling back to \"%s\", "
+ "expect ugly output.", ctmp1, ctmp2);
+ g_free (ctmp2);
+ }
+ g_free (ctmp1);
+
+ 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);
+
+ if (!warned_fonts || !g_hash_table_lookup (warned_fonts, ctmp1))
+ {
+ g_hash_table_insert (warned_fonts, g_strdup (ctmp1), GINT_TO_POINTER (1));
+
+ ctmp2 = pango_font_description_to_string (tmp_desc);
+
+ g_warning ("couldn't load font \"%s\", falling back to \"%s\", "
+ "expect ugly output.", ctmp1, ctmp2);
+ g_free (ctmp2);
+ }
+
+ g_free (ctmp1);
+
+ 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,
+ * but lets just not crash here.
+ */
+ if (pango_fontset_simple_size (fonts) == 0)
+ g_warning ("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
+ **/
+G_CONST_RETURN 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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