/* Pango * pango-font.h: 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 #include #include #include #include #include "pango-fontmap.h" #include "pango-utils.h" #include "pangox-private.h" #define PANGO_TYPE_X_FONT_MAP (pango_x_font_map_get_type ()) #define PANGO_X_FONT_MAP(object) (G_TYPE_CHECK_INSTANCE_CAST ((object), PANGO_TYPE_X_FONT_MAP, PangoXFontMap)) #define PANGO_X_FONT_MAP_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), PANGO_TYPE_X_FONT_MAP, PangoXFontMapClass)) #define PANGO_X_IS_FONT_MAP(object) (G_TYPE_CHECK_INSTANCE_TYPE ((object), PANGO_TYPE_X_FONT_MAP)) #define PANGO_X_IS_FONT_MAP_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), PANGO_TYPE_X_FONT_MAP)) #define PANGO_X_FONT_MAP_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), PANGO_TYPE_X_FONT_MAP, PangoXFontMapClass)) typedef struct _PangoXFamilyEntry PangoXFamilyEntry; typedef struct _PangoXFontMap PangoXFontMap; typedef struct _PangoXFontMapClass PangoXFontMapClass; typedef struct _PangoXSizeInfo PangoXSizeInfo; /* Number of freed fonts */ #define MAX_FREED_FONTS 16 /* This is the largest field length we will accept. If a fontname has a field larger than this we will skip it. */ #define XLFD_MAX_FIELD_LEN 64 #define MAX_FONTS 32767 /* These are the field numbers in the X Logical Font Description fontnames, e.g. -adobe-courier-bold-o-normal--25-180-100-100-m-150-iso8859-1 */ typedef enum { XLFD_FOUNDRY = 0, XLFD_FAMILY = 1, XLFD_WEIGHT = 2, XLFD_SLANT = 3, XLFD_SET_WIDTH = 4, XLFD_ADD_STYLE = 5, XLFD_PIXELS = 6, XLFD_POINTS = 7, XLFD_RESOLUTION_X = 8, XLFD_RESOLUTION_Y = 9, XLFD_SPACING = 10, XLFD_AVERAGE_WIDTH = 11, XLFD_CHARSET = 12, XLFD_NUM_FIELDS } FontField; struct _PangoXFontMap { PangoFontMap parent_instance; Display *display; PangoXFontCache *font_cache; GQueue *freed_fonts; GHashTable *families; GHashTable *size_infos; int n_fonts; double resolution; /* (points / pixel) * PANGO_SCALE */ }; struct _PangoXFontMapClass { PangoFontMapClass parent_class; }; struct _PangoXFamilyEntry { char *family_name; GSList *font_entries; }; struct _PangoXFontEntry { char *xlfd; PangoFontDescription description; PangoCoverage *coverage; GSList *cached_fonts; }; struct _PangoXSizeInfo { char *identifier; GSList *xlfds; }; const struct { const gchar *text; PangoWeight value; } weights_map[] = { { "light", 300 }, { "regular", 400 }, { "book", 400 }, { "medium", 500 }, { "semibold", 600 }, { "demibold", 600 }, { "bold", 700 }, { "extrabold", 800 }, { "ultrabold", 800 }, { "heavy", 900 }, { "black", 900 } }; const struct { const gchar *text; PangoStyle value; } styles_map[] = { { "r", PANGO_STYLE_NORMAL }, { "i", PANGO_STYLE_ITALIC }, { "o", PANGO_STYLE_OBLIQUE } }; const struct { const gchar *text; PangoStretch value; } stretches_map[] = { { "normal", PANGO_STRETCH_NORMAL }, { "semicondensed", PANGO_STRETCH_SEMI_CONDENSED }, { "condensed", PANGO_STRETCH_CONDENSED }, }; static GType pango_x_font_map_get_type (void); static void pango_x_font_map_init (PangoXFontMap *fontmap); static void pango_x_font_map_class_init (PangoXFontMapClass *class); static void pango_x_font_map_finalize (GObject *object); static PangoFont *pango_x_font_map_load_font (PangoFontMap *fontmap, const PangoFontDescription *description); static void pango_x_font_map_list_fonts (PangoFontMap *fontmap, const gchar *family, PangoFontDescription ***descs, int *n_descs); static void pango_x_font_map_list_families (PangoFontMap *fontmap, gchar ***families, int *n_families); static void pango_x_fontmap_cache_clear (PangoXFontMap *xfontmap); static void pango_x_font_map_read_aliases (PangoXFontMap *xfontmap); static gint pango_x_get_size (PangoXFontMap *fontmap, const char *fontname); static void pango_x_insert_font (PangoXFontMap *fontmap, const char *fontname); static gboolean pango_x_is_xlfd_font_name (const char *fontname); static char * pango_x_get_xlfd_field (const char *fontname, FontField field_num, char *buffer); static char * pango_x_get_identifier (const char *fontname); static PangoFontClass *parent_class; /* Parent class structure for PangoXFontMap */ static GType pango_x_font_map_get_type (void) { static GType object_type = 0; if (!object_type) { static const GTypeInfo object_info = { sizeof (PangoXFontMapClass), (GBaseInitFunc) NULL, (GBaseFinalizeFunc) NULL, (GClassInitFunc) pango_x_font_map_class_init, NULL, /* class_finalize */ NULL, /* class_data */ sizeof (PangoXFontMap), 0, /* n_preallocs */ (GInstanceInitFunc) pango_x_font_map_init, }; object_type = g_type_register_static (PANGO_TYPE_FONT_MAP, "PangoXFontMap", &object_info); } return object_type; } static void pango_x_font_map_init (PangoXFontMap *xfontmap) { xfontmap->families = g_hash_table_new (g_str_hash, g_str_equal); xfontmap->size_infos = g_hash_table_new (g_str_hash, g_str_equal); xfontmap->n_fonts = 0; } static void pango_x_font_map_class_init (PangoXFontMapClass *class) { GObjectClass *object_class = G_OBJECT_CLASS (class); PangoFontMapClass *font_map_class = PANGO_FONT_MAP_CLASS (class); parent_class = g_type_class_peek_parent (class); object_class->finalize = pango_x_font_map_finalize; font_map_class->load_font = pango_x_font_map_load_font; font_map_class->list_fonts = pango_x_font_map_list_fonts; font_map_class->list_families = pango_x_font_map_list_families; } static GList *fontmaps = NULL; PangoFontMap * pango_x_font_map_for_display (Display *display) { PangoXFontMap *xfontmap; GList *tmp_list = fontmaps; char **xfontnames; int num_fonts, i; int screen; g_return_val_if_fail (display != NULL, NULL); /* Make sure that the type system is initialized */ g_type_init(); while (tmp_list) { xfontmap = tmp_list->data; if (xfontmap->display == display) return PANGO_FONT_MAP (xfontmap); } xfontmap = (PangoXFontMap *)g_type_create_instance (PANGO_TYPE_X_FONT_MAP); xfontmap->display = display; xfontmap->font_cache = pango_x_font_cache_new (display); xfontmap->freed_fonts = g_queue_new (); /* Get a maximum of MAX_FONTS fontnames from the X server. Use "-*" as the pattern rather than "-*-*-*-*-*-*-*-*-*-*-*-*-*-*" since the latter may result in fonts being returned which don't actually exist. xlsfonts also uses "*" so I think it's OK. "-*" gets rid of aliases. */ xfontnames = XListFonts (xfontmap->display, "-*", MAX_FONTS, &num_fonts); if (num_fonts == MAX_FONTS) g_warning("MAX_FONTS exceeded. Some fonts may be missing."); /* Insert the font families into the main table */ for (i = 0; i < num_fonts; i++) { if (pango_x_is_xlfd_font_name (xfontnames[i])) pango_x_insert_font (xfontmap, xfontnames[i]); } XFreeFontNames (xfontnames); pango_x_font_map_read_aliases (xfontmap); fontmaps = g_list_prepend (fontmaps, xfontmap); /* This is a little screwed up, since different screens on the same display * might have different resolutions */ screen = DefaultScreen (xfontmap->display); xfontmap->resolution = (PANGO_SCALE * 72.27 / 25.4) * ((double) DisplayWidthMM (xfontmap->display, screen) / DisplayWidth (xfontmap->display, screen)); return PANGO_FONT_MAP (xfontmap); } /** * pango_x_shutdown_display: * @display: an X #Display * * Free cached resources for the given X display structure. **/ void pango_x_shutdown_display (Display *display) { GList *tmp_list; g_return_if_fail (display != NULL); tmp_list = fontmaps; while (tmp_list) { PangoXFontMap *xfontmap = tmp_list->data; if (xfontmap->display == display) { fontmaps = g_list_delete_link (fontmaps, tmp_list); pango_x_fontmap_cache_clear (xfontmap); g_object_unref (G_OBJECT (xfontmap)); return; } tmp_list = tmp_list->next; } } static void pango_x_font_map_finalize (GObject *object) { PangoXFontMap *xfontmap = PANGO_X_FONT_MAP (object); g_list_foreach (xfontmap->freed_fonts->head, (GFunc)g_object_unref, NULL); g_queue_free (xfontmap->freed_fonts); pango_x_font_cache_free (xfontmap->font_cache); /* FIXME: Lots more here */ fontmaps = g_list_remove (fontmaps, xfontmap); G_OBJECT_CLASS (parent_class)->finalize (object); } typedef struct { int n_found; PangoFontDescription **descs; } ListFontsInfo; static void list_fonts_foreach (gpointer key, gpointer value, gpointer user_data) { PangoXFamilyEntry *entry = value; ListFontsInfo *info = user_data; GSList *tmp_list = entry->font_entries; while (tmp_list) { PangoXFontEntry *font_entry = tmp_list->data; info->descs[info->n_found++] = pango_font_description_copy (&font_entry->description); tmp_list = tmp_list->next; } } static void pango_x_font_map_list_fonts (PangoFontMap *fontmap, const gchar *family, PangoFontDescription ***descs, int *n_descs) { PangoXFontMap *xfontmap = (PangoXFontMap *)fontmap; ListFontsInfo info; if (!n_descs) return; if (family) { PangoXFamilyEntry *entry = g_hash_table_lookup (xfontmap->families, family); if (entry) { *n_descs = g_slist_length (entry->font_entries); if (descs) { *descs = g_new (PangoFontDescription *, *n_descs); info.descs = *descs; info.n_found = 0; list_fonts_foreach ((gpointer)family, (gpointer)entry, &info); } } else { *n_descs = 0; if (descs) *descs = NULL; } } else { *n_descs = xfontmap->n_fonts; if (descs) { *descs = g_new (PangoFontDescription *, xfontmap->n_fonts); info.descs = *descs; info.n_found = 0; g_hash_table_foreach (xfontmap->families, list_fonts_foreach, &info); } } } static void list_families_foreach (gpointer key, gpointer value, gpointer user_data) { GSList **list = user_data; *list = g_slist_prepend (*list, key); } static void pango_x_font_map_list_families (PangoFontMap *fontmap, gchar ***families, int *n_families) { GSList *family_list = NULL; GSList *tmp_list; PangoXFontMap *xfontmap = (PangoXFontMap *)fontmap; if (!n_families) return; g_hash_table_foreach (xfontmap->families, list_families_foreach, &family_list); *n_families = g_slist_length (family_list); if (families) { int i = 0; *families = g_new (gchar *, *n_families); tmp_list = family_list; while (tmp_list) { (*families)[i] = g_strdup (tmp_list->data); i++; tmp_list = tmp_list->next; } } g_slist_free (family_list); } static PangoXFamilyEntry * pango_x_get_family_entry (PangoXFontMap *xfontmap, const char *family_name) { PangoXFamilyEntry *family_entry = g_hash_table_lookup (xfontmap->families, family_name); if (!family_entry) { family_entry = g_new (PangoXFamilyEntry, 1); family_entry->family_name = g_strdup (family_name); family_entry->font_entries = NULL; g_hash_table_insert (xfontmap->families, family_entry->family_name, family_entry); } return family_entry; } static PangoFont * pango_x_font_map_load_font (PangoFontMap *fontmap, const PangoFontDescription *description) { PangoXFontMap *xfontmap = (PangoXFontMap *)fontmap; PangoXFamilyEntry *family_entry; PangoFont *result = NULL; GSList *tmp_list; gchar *name; g_return_val_if_fail (description != NULL, NULL); g_return_val_if_fail (description->size > 0, NULL); name = g_strdup (description->family_name); g_strdown (name); family_entry = g_hash_table_lookup (xfontmap->families, name); if (family_entry) { PangoXFontEntry *best_match = NULL; tmp_list = family_entry->font_entries; while (tmp_list) { PangoXFontEntry *font_entry = tmp_list->data; if (font_entry->description.style == description->style && font_entry->description.variant == description->variant && font_entry->description.stretch == description->stretch) { int distance = abs(font_entry->description.weight - description->weight); int old_distance = best_match ? abs(best_match->description.weight - description->weight) : G_MAXINT; if (distance < old_distance) { best_match = font_entry; } } tmp_list = tmp_list->next; } if (best_match) { GSList *tmp_list = best_match->cached_fonts; while (tmp_list) { PangoXFont *xfont = tmp_list->data; if (xfont->size == description->size) { result = (PangoFont *)xfont; g_object_ref (G_OBJECT (result)); if (xfont->in_cache) pango_x_fontmap_cache_remove (fontmap, xfont); break; } tmp_list = tmp_list->next; } if (!result) { PangoXFont *xfont = pango_x_font_new (fontmap, best_match->xlfd, description->size); xfont->fontmap = fontmap; xfont->entry = best_match; best_match->cached_fonts = g_slist_prepend (best_match->cached_fonts, xfont); result = (PangoFont *)xfont; } } } g_free (name); return result; } static gboolean get_style (GString *str, PangoFontDescription *desc) { if (str->len == 0) return FALSE; switch (str->str[0]) { case 'n': case 'N': if (strncasecmp (str->str, "normal", str->len) == 0) { desc->style = PANGO_STYLE_NORMAL; return TRUE; } break; case 'i': if (strncasecmp (str->str, "italic", str->len) == 0) { desc->style = PANGO_STYLE_ITALIC; return TRUE; } break; case 'o': if (strncasecmp (str->str, "oblique", str->len) == 0) { desc->style = PANGO_STYLE_OBLIQUE; return TRUE; } break; } g_warning ("Style must be normal, italic, or oblique"); return FALSE; } static gboolean get_variant (GString *str, PangoFontDescription *desc) { if (str->len == 0) return FALSE; switch (str->str[0]) { case 'n': case 'N': if (strncasecmp (str->str, "normal", str->len) == 0) { desc->variant = PANGO_VARIANT_NORMAL; return TRUE; } break; case 's': case 'S': if (strncasecmp (str->str, "small_caps", str->len) == 0) { desc->variant = PANGO_VARIANT_SMALL_CAPS; return TRUE; } break; } g_warning ("Variant must be normal, or small_caps"); return FALSE; } static gboolean get_weight (GString *str, PangoFontDescription *desc) { if (str->len == 0) return FALSE; switch (str->str[0]) { case 'n': case 'N': if (strncasecmp (str->str, "normal", str->len) == 0) { desc->weight = PANGO_WEIGHT_NORMAL; return TRUE; } break; case 'b': case 'B': if (strncasecmp (str->str, "bold", str->len) == 0) { desc->weight = PANGO_WEIGHT_BOLD; return TRUE; } break; case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': { char *numstr, *end; numstr = g_strndup (str->str, str->len); desc->weight = strtol (numstr, &end, 0); if (*end != '\0') { g_warning ("Cannot parse numerical weight '%s'", numstr); g_free (numstr); return FALSE; } g_free (numstr); return TRUE; } } g_warning ("Weight must be normal, bold, or an integer"); return FALSE; } static gboolean get_stretch (GString *str, PangoFontDescription *desc) { if (str->len == 0) return FALSE; switch (str->str[0]) { case 'c': case 'C': if (strncasecmp (str->str, "condensed", str->len) == 0) { desc->stretch = PANGO_STRETCH_CONDENSED; return TRUE; } break; case 'e': case 'E': if (strncasecmp (str->str, "extra_condensed", str->len) == 0) { desc->stretch = PANGO_STRETCH_EXTRA_CONDENSED; return TRUE; } if (strncasecmp (str->str, "extra_expanded", str->len) == 0) { desc->stretch = PANGO_STRETCH_EXTRA_EXPANDED; return TRUE; } if (strncasecmp (str->str, "expanded", str->len) == 0) { desc->stretch = PANGO_STRETCH_EXPANDED; return TRUE; } break; case 'n': case 'N': if (strncasecmp (str->str, "normal", str->len) == 0) { desc->stretch = PANGO_STRETCH_NORMAL; return TRUE; } break; case 's': case 'S': if (strncasecmp (str->str, "semi_condensed", str->len) == 0) { desc->stretch = PANGO_STRETCH_SEMI_CONDENSED; return TRUE; } if (strncasecmp (str->str, "semi_expanded", str->len) == 0) { desc->stretch = PANGO_STRETCH_SEMI_EXPANDED; return TRUE; } break; case 'u': case 'U': if (strncasecmp (str->str, "ultra_condensed", str->len) == 0) { desc->stretch = PANGO_STRETCH_ULTRA_CONDENSED; return TRUE; } if (strncasecmp (str->str, "ultra_expanded", str->len) == 0) { desc->variant = PANGO_STRETCH_ULTRA_EXPANDED; return TRUE; } break; } g_warning ("Stretch must be ultra_condensed, extra_condensed, condensed, semi_condensed, normal, semi_expanded, expanded, extra_expanded, or ultra_expanded"); return FALSE; } static void pango_x_font_map_read_alias_file (PangoXFontMap *xfontmap, const char *filename) { FILE *infile; char **xlfds; int lineno = 0; int i; PangoXFontEntry *font_entry = NULL; infile = fopen (filename, "r"); if (infile) { GString *line_buf = g_string_new (NULL); GString *tmp_buf = g_string_new (NULL); while (pango_read_line (infile, line_buf)) { PangoXFamilyEntry *family_entry; const char *p = line_buf->str; lineno++; if (!pango_skip_space (&p)) continue; if (!pango_scan_string (&p, tmp_buf)) goto error; font_entry = g_new (PangoXFontEntry, 1); font_entry->xlfd = NULL; font_entry->description.family_name = g_strdup (tmp_buf->str); g_strdown (font_entry->description.family_name); if (!pango_scan_string (&p, tmp_buf)) goto error; if (!get_style (tmp_buf, &font_entry->description)) goto error; if (!pango_scan_string (&p, tmp_buf)) goto error; if (!get_variant (tmp_buf, &font_entry->description)) goto error; if (!pango_scan_string (&p, tmp_buf)) goto error; if (!get_weight (tmp_buf, &font_entry->description)) goto error; if (!pango_scan_string (&p, tmp_buf)) goto error; if (!get_stretch (tmp_buf, &font_entry->description)) goto error; if (!pango_scan_string (&p, tmp_buf)) goto error; /* Remove excess whitespace and check for complete fields */ xlfds = g_strsplit (tmp_buf->str, ",", -1); for (i=0; xlfds[i]; i++) { char *trimmed = pango_trim_string (xlfds[i]); g_free (xlfds[i]); xlfds[i] = trimmed; if (!pango_x_is_xlfd_font_name (xlfds[i])) { g_warning ("XLFD '%s' must be complete (14 fields)", xlfds[i]); g_strfreev (xlfds); goto error; } } font_entry->xlfd = g_strjoinv (",", xlfds); g_strfreev (xlfds); /* Insert the font entry into our structures */ family_entry = pango_x_get_family_entry (xfontmap, font_entry->description.family_name); family_entry->font_entries = g_slist_prepend (family_entry->font_entries, font_entry); xfontmap->n_fonts++; g_free (font_entry->description.family_name); font_entry->description.family_name = family_entry->family_name; font_entry->cached_fonts = NULL; font_entry->coverage = NULL; } if (ferror (infile)) g_warning ("Error reading '%s': %s", filename, g_strerror(errno)); goto out; error: if (font_entry) { if (font_entry->xlfd) g_free (font_entry->xlfd); if (font_entry->description.family_name) g_free (font_entry->description.family_name); g_free (font_entry); } g_warning ("Error parsing line %d of alias file '%s'", lineno, filename); out: g_string_free (tmp_buf, TRUE); g_string_free (line_buf, TRUE); fclose (infile); } } static void pango_x_font_map_read_aliases (PangoXFontMap *xfontmap) { char **files; char *files_str = pango_config_key_get ("PangoX/AliasFiles"); int n; if (!files_str) files_str = g_strdup ("~/.pangox_aliases:" SYSCONFDIR "/pango/pangox.aliases"); files = pango_split_file_list (files_str); n = 0; while (files[n]) n++; while (n-- > 0) pango_x_font_map_read_alias_file (xfontmap, files[n]); g_strfreev (files); g_free (files_str); } /* * Returns TRUE if the fontname is a valid XLFD. * (It just checks if the number of dashes is 14, and that each * field < XLFD_MAX_FIELD_LEN characters long - that's not in the XLFD but it * makes it easier for me). */ static gboolean pango_x_is_xlfd_font_name (const char *fontname) { int i = 0; int field_len = 0; while (*fontname) { if (*fontname++ == '-') { if (field_len > XLFD_MAX_FIELD_LEN) return FALSE; field_len = 0; i++; } else field_len++; } return (i == 14) ? TRUE : FALSE; } static int pango_x_get_size (PangoXFontMap *xfontmap, const char *fontname) { char size_buffer[XLFD_MAX_FIELD_LEN]; int size; if (!pango_x_get_xlfd_field (fontname, XLFD_PIXELS, size_buffer)) return -1; size = atoi (size_buffer); if (size != 0) { return (int)(0.5 + size * xfontmap->resolution); } else { /* We use the trick that scaled bitmaps have a non-zero RESOLUTION_X, while * actual scaleable fonts have a zero RESOLUTION_X */ if (!pango_x_get_xlfd_field (fontname, XLFD_RESOLUTION_X, size_buffer)) return -1; if (atoi (size_buffer) == 0) return 0; else return -1; } } static char * pango_x_get_identifier (const char *fontname) { const char *p = fontname; const char *start; int n_dashes = 0; while (n_dashes < 2) { if (*p == '-') n_dashes++; p++; } start = p; while (n_dashes < 6) { if (*p == '-') n_dashes++; p++; } return g_strndup (start, (p - 1 - start)); } /* * This fills the buffer with the specified field from the X Logical Font * Description name, and returns it. If fontname is NULL or the field is * longer than XFLD_MAX_FIELD_LEN it returns NULL. * Note: For the charset field, we also return the encoding, e.g. 'iso8859-1'. */ static char* pango_x_get_xlfd_field (const char *fontname, FontField field_num, char *buffer) { const char *t1, *t2; int countdown, len, num_dashes; if (!fontname) return NULL; /* we assume this is a valid fontname...that is, it has 14 fields */ countdown = field_num; t1 = fontname; while (*t1 && (countdown >= 0)) if (*t1++ == '-') countdown--; num_dashes = (field_num == XLFD_CHARSET) ? 2 : 1; for (t2 = t1; *t2; t2++) { if (*t2 == '-' && --num_dashes == 0) break; } if (t1 != t2) { /* Check we don't overflow the buffer */ len = (long) t2 - (long) t1; if (len > XLFD_MAX_FIELD_LEN - 1) return NULL; strncpy (buffer, t1, len); buffer[len] = 0; /* Convert to lower case. */ g_strdown (buffer); } else strcpy(buffer, "(nil)"); return buffer; } /* This inserts the given fontname into the FontInfo table. If a FontInfo already exists with the same family and foundry, then the fontname is added to the FontInfos list of fontnames, else a new FontInfo is created and inserted in alphabetical order in the table. */ static void pango_x_insert_font (PangoXFontMap *xfontmap, const char *fontname) { PangoFontDescription description; char family_buffer[XLFD_MAX_FIELD_LEN]; char weight_buffer[XLFD_MAX_FIELD_LEN]; char slant_buffer[XLFD_MAX_FIELD_LEN]; char set_width_buffer[XLFD_MAX_FIELD_LEN]; GSList *tmp_list; PangoXFamilyEntry *family_entry; PangoXFontEntry *font_entry; PangoXSizeInfo *size_info; char *identifier; int i; description.size = 0; /* First insert the XLFD into the list of XLFDs for the "identifier" - which * is the 2-4th fields of the XLFD */ identifier = pango_x_get_identifier (fontname); size_info = g_hash_table_lookup (xfontmap->size_infos, identifier); if (!size_info) { size_info = g_new (PangoXSizeInfo, 1); size_info->identifier = identifier; size_info->xlfds = NULL; g_hash_table_insert (xfontmap->size_infos, identifier, size_info); } else g_free (identifier); size_info->xlfds = g_slist_prepend (size_info->xlfds, g_strdup (fontname)); /* Convert the XLFD into a PangoFontDescription */ description.family_name = pango_x_get_xlfd_field (fontname, XLFD_FAMILY, family_buffer); g_strdown (description.family_name); if (!description.family_name) return; description.style = PANGO_STYLE_NORMAL; if (pango_x_get_xlfd_field (fontname, XLFD_SLANT, slant_buffer)) { for (i=0; ifont_entries; while (tmp_list) { font_entry = tmp_list->data; if (font_entry->description.style == description.style && font_entry->description.variant == description.variant && font_entry->description.weight == description.weight && font_entry->description.stretch == description.stretch) return; tmp_list = tmp_list->next; } font_entry = g_new (PangoXFontEntry, 1); font_entry->description = description; font_entry->description.family_name = family_entry->family_name; font_entry->cached_fonts = NULL; font_entry->coverage = NULL; font_entry->xlfd = g_strconcat ("-*-", family_buffer, "-", weight_buffer, "-", slant_buffer, "-", set_width_buffer, "--*-*-*-*-*-*-*-*", NULL); family_entry->font_entries = g_slist_append (family_entry->font_entries, font_entry); xfontmap->n_fonts++; } /* Compare the tail of a to b */ static gboolean match_end (char *a, char *b) { size_t len_a = strlen (a); size_t len_b = strlen (b); if (len_b > len_a) return FALSE; else return (strcmp (a + len_a - len_b, b) == 0); } /* Given a xlfd, charset and size, find the best matching installed X font. * The XLFD must be a full XLFD (14 fields) */ char * pango_x_make_matching_xlfd (PangoFontMap *fontmap, char *xlfd, const char *charset, int size) { PangoXFontMap *xfontmap; GSList *tmp_list; PangoXSizeInfo *size_info; char *identifier; char *closest_match = NULL; gint match_distance = 0; gboolean match_scaleable = FALSE; char *result = NULL; char *dash_charset; xfontmap = PANGO_X_FONT_MAP (fontmap); dash_charset = g_strconcat ("-", charset, NULL); if (!match_end (xlfd, "-*-*") && !match_end (xlfd, dash_charset)) { g_free (dash_charset); return NULL; } identifier = pango_x_get_identifier (xlfd); size_info = g_hash_table_lookup (xfontmap->size_infos, identifier); g_free (identifier); if (!size_info) { g_free (dash_charset); return NULL; } tmp_list = size_info->xlfds; while (tmp_list) { char *tmp_xlfd = tmp_list->data; if (match_end (tmp_xlfd, dash_charset)) { int font_size = pango_x_get_size (xfontmap, tmp_xlfd); if (size != -1) { int new_distance = (font_size == 0) ? 0 : abs (font_size - size); if (!closest_match || new_distance < match_distance || (new_distance < PANGO_SCALE && match_scaleable && font_size != 0)) { closest_match = tmp_xlfd; match_scaleable = (font_size == 0); match_distance = new_distance; } } } tmp_list = tmp_list->next; } if (closest_match) { if (match_scaleable) { char *prefix_end, *p; char *size_end; int n_dashes = 0; int target_size; char *prefix; /* OK, we have a match; let's modify it to fit this size and charset */ p = closest_match; while (n_dashes < 6) { if (*p == '-') n_dashes++; p++; } prefix_end = p - 1; while (n_dashes < 9) { if (*p == '-') n_dashes++; p++; } size_end = p - 1; target_size = (int)((double)size / xfontmap->resolution + 0.5); prefix = g_strndup (closest_match, prefix_end - closest_match); result = g_strdup_printf ("%s--%d-*-*-*-*-*-%s", prefix, target_size, charset); g_free (prefix); } else { result = g_strdup (closest_match); } } g_free (dash_charset); return result; } static void free_coverages_foreach (gpointer key, gpointer value, gpointer data) { pango_coverage_unref (value); } PangoCoverage * pango_x_font_entry_get_coverage (PangoXFontEntry *entry, PangoFont *font, const char *lang) { guint32 ch; PangoMap *shape_map; PangoCoverage *coverage; PangoCoverage *result; PangoCoverageLevel font_level; PangoMapEntry *map_entry; GHashTable *coverage_hash; if (entry) if (entry->coverage) { pango_coverage_ref (entry->coverage); return entry->coverage; } result = pango_coverage_new (); coverage_hash = g_hash_table_new (g_str_hash, g_str_equal); shape_map = pango_x_get_shaper_map (lang); for (ch = 0; ch < 65536; ch++) { map_entry = pango_map_get_entry (shape_map, ch); if (map_entry->info) { coverage = g_hash_table_lookup (coverage_hash, map_entry->info->id); if (!coverage) { PangoEngineShape *engine = (PangoEngineShape *)pango_map_get_engine (shape_map, ch); coverage = engine->get_coverage (font, lang); g_hash_table_insert (coverage_hash, map_entry->info->id, coverage); } font_level = pango_coverage_get (coverage, ch); if (font_level == PANGO_COVERAGE_EXACT && !map_entry->is_exact) font_level = PANGO_COVERAGE_APPROXIMATE; if (font_level != PANGO_COVERAGE_NONE) pango_coverage_set (result, ch, font_level); } } g_hash_table_foreach (coverage_hash, free_coverages_foreach, NULL); g_hash_table_destroy (coverage_hash); if (entry) { entry->coverage = result; pango_coverage_ref (result); } return result; } void pango_x_font_entry_remove (PangoXFontEntry *entry, PangoFont *font) { entry->cached_fonts = g_slist_remove (entry->cached_fonts, font); } PangoXFontCache * pango_x_font_map_get_font_cache (PangoFontMap *font_map) { g_return_val_if_fail (font_map != NULL, NULL); g_return_val_if_fail (PANGO_X_IS_FONT_MAP (font_map), NULL); return PANGO_X_FONT_MAP (font_map)->font_cache; } Display * pango_x_fontmap_get_display (PangoFontMap *fontmap) { g_return_val_if_fail (fontmap != NULL, NULL); g_return_val_if_fail (PANGO_X_IS_FONT_MAP (fontmap), NULL); return PANGO_X_FONT_MAP (fontmap)->display; } void pango_x_fontmap_cache_add (PangoFontMap *fontmap, PangoXFont *xfont) { PangoXFontMap *xfontmap = PANGO_X_FONT_MAP (fontmap); if (xfontmap->freed_fonts->length == MAX_FREED_FONTS) { PangoXFont *old_font = g_queue_pop_tail (xfontmap->freed_fonts); g_object_unref (G_OBJECT (old_font)); } g_object_ref (G_OBJECT (xfont)); g_queue_push_head (xfontmap->freed_fonts, xfont); xfont->in_cache = TRUE; } void pango_x_fontmap_cache_remove (PangoFontMap *fontmap, PangoXFont *xfont) { PangoXFontMap *xfontmap = PANGO_X_FONT_MAP (fontmap); GList *link = g_list_find (xfontmap->freed_fonts->head, xfont); if (link == xfontmap->freed_fonts->tail) { xfontmap->freed_fonts->tail = xfontmap->freed_fonts->tail->prev; if (xfontmap->freed_fonts->tail) xfontmap->freed_fonts->tail->next = NULL; } xfontmap->freed_fonts->head = g_list_delete_link (xfontmap->freed_fonts->head, link); xfontmap->freed_fonts->length--; xfont->in_cache = FALSE; g_object_unref (G_OBJECT (xfont)); } static void pango_x_fontmap_cache_clear (PangoXFontMap *xfontmap) { g_list_foreach (xfontmap->freed_fonts->head, (GFunc)g_object_unref, NULL); g_list_free (xfontmap->freed_fonts->head); xfontmap->freed_fonts->head = NULL; xfontmap->freed_fonts->tail = NULL; xfontmap->freed_fonts->length = 0; }