/* Pango * pangox-fontmap.c: X 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 #include #include #include #include #include /* For XExtSetCloseDisplay */ #include #include "pango-engine-private.h" #include "pango-fontmap.h" #include "pango-impl-utils.h" #include "modules.h" #undef PANGO_DISABLE_DEPRECATED #include "pangox-private.h" typedef struct _PangoXFamily PangoXFamily; 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 _PangoXFamily { PangoFontFamily parent_instance; char *family_name; GSList *font_entries; }; struct _PangoXFace { PangoFontFace parent_instance; char *xlfd; PangoFontDescription *description; PangoCoverage *coverage; char *face_name; GSList *cached_fonts; }; struct _PangoXSizeInfo { char *identifier; GSList *xlfds; }; static const struct { const gchar text[12]; 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 } }; static const struct { const gchar text[4]; PangoStyle value; } styles_map[] = { { "r", PANGO_STYLE_NORMAL }, { "i", PANGO_STYLE_ITALIC }, { "o", PANGO_STYLE_OBLIQUE } }; static const struct { const gchar text[16]; PangoStretch value; } stretches_map[] = { { "normal", PANGO_STRETCH_NORMAL }, { "semicondensed", PANGO_STRETCH_SEMI_CONDENSED }, { "condensed", PANGO_STRETCH_CONDENSED }, }; static void pango_x_font_map_init (PangoXFontMap *fontmap); static void pango_x_font_map_class_init (PangoFontMapClass *class); static void pango_x_font_map_finalize (GObject *object); static PangoFont *pango_x_font_map_load_font (PangoFontMap *fontmap, PangoContext *context, const PangoFontDescription *description); static void pango_x_font_map_list_families (PangoFontMap *fontmap, PangoFontFamily ***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); #define PANGO_X_TYPE_FAMILY (pango_x_family_get_type ()) #define PANGO_X_FAMILY(object) (G_TYPE_CHECK_INSTANCE_CAST ((object), PANGO_X_TYPE_FAMILY, PangoXFamily)) #define PANGO_X_IS_FAMILY(object) (G_TYPE_CHECK_INSTANCE_TYPE ((object), PANGO_X_TYPE_FAMILY)) GType pango_x_family_get_type (void); #define PANGO_X_TYPE_FACE (pango_x_face_get_type ()) #define PANGO_X_FACE(object) (G_TYPE_CHECK_INSTANCE_CAST ((object), PANGO_X_TYPE_FACE, PangoXFace)) #define PANGO_X_IS_FACE(object) (G_TYPE_CHECK_INSTANCE_TYPE ((object), PANGO_X_TYPE_FACE)) GType pango_x_face_get_type (void); static PangoFontClass *font_map_parent_class; /* Parent class structure for PangoXFontMap */ GType pango_x_font_map_get_type (void) { static GType object_type = 0; if (G_UNLIKELY (!object_type)) { const GTypeInfo object_info = { sizeof (PangoFontMapClass), (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, NULL /* value_table */ }; object_type = g_type_register_static (PANGO_TYPE_FONT_MAP, I_("PangoXFontMap"), &object_info, 0); } 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->to_atom_cache = g_hash_table_new (g_str_hash, g_str_equal); xfontmap->from_atom_cache = g_hash_table_new (g_direct_hash, g_direct_equal); xfontmap->n_fonts = 0; } static void pango_x_font_map_class_init (PangoFontMapClass *class) { GObjectClass *object_class = G_OBJECT_CLASS (class); font_map_parent_class = g_type_class_peek_parent (class); object_class->finalize = pango_x_font_map_finalize; class->load_font = pango_x_font_map_load_font; class->list_families = pango_x_font_map_list_families; class->shape_engine_type = PANGO_RENDER_TYPE_X; } /* * Hackery to set up notification when a Display is closed */ static GSList *registered_displays; static int close_display_cb (Display *display, XExtCodes *extcodes G_GNUC_UNUSED) { pango_x_shutdown_display (display); registered_displays = g_slist_remove (registered_displays, display); return 0; } static void register_display (Display *display) { XExtCodes *extcodes; GSList *tmp_list; for (tmp_list = registered_displays; tmp_list; tmp_list = tmp_list->next) { if (tmp_list->data == display) return; } registered_displays = g_slist_prepend (registered_displays, display); extcodes = XAddExtension (display); XESetCloseDisplay (display, extcodes->extension, close_display_cb); } static GList *fontmaps = NULL; /** * pango_x_font_map_for_display: * @display: an X #Display. * * Returns a #PangoXFontMap for @display. Font maps are cached and should * not be freed. If the font map for a display is no longer needed, it can * be released with pango_x_shutdown_display(). * * Return value: a #PangoXFontMap for @display. **/ PangoFontMap * pango_x_font_map_for_display (Display *display) { PangoXFontMap *xfontmap; GList *tmp_list = fontmaps; char **xfontnames; int num_fonts, i; int screen; static gboolean registered_modules = FALSE; g_return_val_if_fail (display != NULL, NULL); if (!registered_modules) { registered_modules = TRUE; for (i = 0; _pango_included_x_modules[i].list; i++) pango_module_register (&_pango_included_x_modules[i]); } /* 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); tmp_list = tmp_list->next; } xfontmap = g_object_new (PANGO_TYPE_X_FONT_MAP, NULL); 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)); register_display (xfontmap->display); 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 (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: None of these hashtables free their key/values g_hash_table_destroy (xfontmap->families); g_hash_table_destroy (xfontmap->size_infos); g_hash_table_destroy (xfontmap->to_atom_cache); g_hash_table_destroy (xfontmap->from_atom_cache); */ fontmaps = g_list_remove (fontmaps, xfontmap); G_OBJECT_CLASS (font_map_parent_class)->finalize (object); } static void list_families_foreach (gpointer key G_GNUC_UNUSED, gpointer value, gpointer user_data) { GSList **list = user_data; *list = g_slist_prepend (*list, value); } static void pango_x_font_map_list_families (PangoFontMap *fontmap, PangoFontFamily ***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 (PangoFontFamily *, *n_families); tmp_list = family_list; while (tmp_list) { (*families)[i] = tmp_list->data; i++; tmp_list = tmp_list->next; } } g_slist_free (family_list); } static PangoXFamily * pango_x_get_font_family (PangoXFontMap *xfontmap, const char *family_name) { PangoXFamily *font_family = g_hash_table_lookup (xfontmap->families, family_name); if (!font_family) { font_family = g_object_new (PANGO_X_TYPE_FAMILY, NULL); font_family->family_name = g_strdup (family_name); font_family->font_entries = NULL; g_hash_table_insert (xfontmap->families, font_family->family_name, font_family); } return font_family; } static PangoFont * pango_x_font_map_load_font (PangoFontMap *fontmap, PangoContext *context G_GNUC_UNUSED, const PangoFontDescription *description) { PangoXFontMap *xfontmap = (PangoXFontMap *)fontmap; PangoXFamily *font_family; PangoFont *result = NULL; GSList *tmp_list; const gchar *family; gchar *name; gint size; g_return_val_if_fail (description != NULL, NULL); family = pango_font_description_get_family (description); name = g_ascii_strdown (family ? family : "", -1); size = pango_font_description_get_size (description); if (size < 0) return NULL; font_family = g_hash_table_lookup (xfontmap->families, name); if (font_family) { PangoXFace *best_match = NULL; tmp_list = font_family->font_entries; while (tmp_list) { PangoXFace *font_entry = tmp_list->data; if (pango_font_description_better_match (description, best_match ? best_match->description : NULL, font_entry->description)) 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 == size) { result = (PangoFont *)xfont; g_object_ref (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, size); xfont->xface = best_match; best_match->cached_fonts = g_slist_prepend (best_match->cached_fonts, xfont); result = (PangoFont *)xfont; } } } g_free (name); return result; } /************************ * Coverage Map Caching * ************************/ /* We need to be robust against errors accessing the coverage * cache window, since it is not our window. So we temporarily * set this error handler while accessing it. The error_occurred * global allows us to tell whether an error occurred for * XChangeProperty */ static gboolean error_occurred; static int ignore_error (Display *d G_GNUC_UNUSED, XErrorEvent *e G_GNUC_UNUSED) { return 0; } /* Retrieve the coverage window for the given display. * We look for a property on the root window, and then * check that the window that property points to also * has the same property pointing to itself. The second * check allows us to make sure that a stale property * isn't just pointing to some other apps window */ static Window pango_x_real_get_coverage_win (Display *display) { Atom type; int format; gulong n_items; gulong bytes_after; guchar *data; Window retval = None; int (*old_handler) (Display *, XErrorEvent *); Atom coverage_win_atom = XInternAtom (display, "PANGO_COVERAGE_WIN", False); XGetWindowProperty (display, DefaultRootWindow (display), coverage_win_atom, 0, 4, False, XA_WINDOW, &type, &format, &n_items, &bytes_after, &data); if (type == XA_WINDOW) { if (format == 32 && n_items == 1 && bytes_after == 0) retval = *(Atom *)data; XFree (data); } old_handler= XSetErrorHandler (ignore_error); if (XGetWindowProperty (display, retval, coverage_win_atom, 0, 4, False, XA_WINDOW, &type, &format, &n_items, &bytes_after, &data) == Success && type == XA_WINDOW) { if (format != 32 || n_items != 1 || bytes_after != 0 || *(Atom *)data != retval) retval = None; XFree (data); } else retval = None; XSync (display, False); XSetErrorHandler (old_handler); return retval; } /* Find or create the persistent window for caching font coverage * information. * * To assure atomic creation, we first look for the window, then if we * don't find it, grab the server, look for it again, and then if that * still didn't find it, create it and ungrab. */ static Window pango_x_get_coverage_win (PangoXFontMap *xfontmap) { if (!xfontmap->coverage_win) xfontmap->coverage_win = pango_x_real_get_coverage_win (xfontmap->display); if (!xfontmap->coverage_win) { Display *persistant_display; persistant_display = XOpenDisplay (DisplayString (xfontmap->display)); if (!persistant_display) { g_warning ("Cannot create or retrieve display for font coverage cache"); return None; } XGrabServer (persistant_display); xfontmap->coverage_win = pango_x_real_get_coverage_win (xfontmap->display); if (!xfontmap->coverage_win) { XSetWindowAttributes attr; attr.override_redirect = True; XSetCloseDownMode (persistant_display, RetainPermanent); xfontmap->coverage_win = XCreateWindow (persistant_display, DefaultRootWindow (persistant_display), -100, -100, 10, 10, 0, 0, InputOnly, (Visual *)CopyFromParent, CWOverrideRedirect, &attr); XChangeProperty (persistant_display, DefaultRootWindow (persistant_display), XInternAtom (persistant_display, "PANGO_COVERAGE_WIN", FALSE), XA_WINDOW, 32, PropModeReplace, (guchar *)&xfontmap->coverage_win, 1); XChangeProperty (persistant_display, xfontmap->coverage_win, XInternAtom (persistant_display, "PANGO_COVERAGE_WIN", FALSE), XA_WINDOW, 32, PropModeReplace, (guchar *)&xfontmap->coverage_win, 1); } XUngrabServer (persistant_display); XSync (persistant_display, False); XCloseDisplay (persistant_display); } return xfontmap->coverage_win; } /* Find the cached value for the coverage map on the * coverage cache window, if it exists. *atom is set * to the interned value of str for later use in storing * the property if the lookup fails */ static PangoCoverage * pango_x_get_cached_coverage (PangoXFontMap *xfontmap, const char *str, Atom *atom) { int (*old_handler) (Display *, XErrorEvent *); Window coverage_win; PangoCoverage *result = NULL; Atom type; int format; int tries = 5; gulong n_items; gulong bytes_after; guchar *data; *atom = XInternAtom (xfontmap->display, str, False); while (tries--) { coverage_win = pango_x_get_coverage_win (xfontmap); if (!coverage_win) return NULL; old_handler= XSetErrorHandler (ignore_error); if (XGetWindowProperty (xfontmap->display, coverage_win, *atom, 0, G_MAXLONG, False, XA_STRING, &type, &format, &n_items, &bytes_after, &data) == Success && type == XA_STRING) { if (format == 8 && bytes_after == 0) result = pango_coverage_from_bytes (data, n_items); XSetErrorHandler (old_handler); XFree (data); break; } else { /* Window disappeared out from under us */ XSetErrorHandler (old_handler); xfontmap->coverage_win = None; } } return result; } /* Store the given coverage map on the coverage cache window. * atom is the intern'ed value of the string that identifies * the cache entry. */ static void pango_x_store_cached_coverage (PangoXFontMap *xfontmap, Atom atom, PangoCoverage *coverage) { int (*old_handler) (Display *, XErrorEvent *); guchar *bytes; gint size; int tries = 5; pango_coverage_to_bytes (coverage, &bytes, &size); while (tries--) { Window coverage_win = pango_x_get_coverage_win (xfontmap); if (!coverage_win) break; old_handler = XSetErrorHandler (ignore_error); error_occurred = False; XChangeProperty (xfontmap->display, coverage_win, atom, XA_STRING, 8, PropModeReplace, bytes, size); XSync (xfontmap->display, False); XSetErrorHandler (old_handler); if (!error_occurred) break; else { /* Window disappeared out from under us */ XSetErrorHandler (old_handler); xfontmap->coverage_win = None; } } g_free (bytes); } static void pango_x_font_map_read_alias_file (PangoXFontMap *xfontmap, const char *filename) { FILE *infile; char **xlfds; int lineno = 0; int i; PangoXFace *xface = NULL; infile = fopen (filename, "r"); if (infile) { GString *line_buf = g_string_new (NULL); GString *tmp_buf = g_string_new (NULL); gint lines_read; while ((lines_read = pango_read_line (infile, line_buf))) { PangoXFamily *font_family; PangoStyle style; PangoVariant variant; PangoWeight weight; PangoStretch stretch; const char *p = line_buf->str; lineno += lines_read; if (!pango_skip_space (&p)) continue; if (!pango_scan_string (&p, tmp_buf)) goto error; xface = g_object_new (PANGO_X_TYPE_FACE, NULL); xface->xlfd = NULL; xface->description = pango_font_description_new (); g_string_ascii_down (tmp_buf); pango_font_description_set_family (xface->description, tmp_buf->str); if (!pango_scan_string (&p, tmp_buf)) goto error; if (!pango_parse_style (tmp_buf->str, &style, TRUE)) goto error; pango_font_description_set_style (xface->description, style); if (!pango_scan_string (&p, tmp_buf)) goto error; if (!pango_parse_variant (tmp_buf->str, &variant, TRUE)) goto error; pango_font_description_set_variant (xface->description, variant); if (!pango_scan_string (&p, tmp_buf)) goto error; if (!pango_parse_weight (tmp_buf->str, &weight, TRUE)) goto error; pango_font_description_set_weight (xface->description, weight); if (!pango_scan_string (&p, tmp_buf)) goto error; if (!pango_parse_stretch (tmp_buf->str, &stretch, TRUE)) goto error; pango_font_description_set_stretch (xface->description, stretch); 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; } } xface->xlfd = g_strjoinv (",", xlfds); g_strfreev (xlfds); /* Insert the font entry into our structures */ font_family = pango_x_get_font_family (xfontmap, pango_font_description_get_family (xface->description)); font_family->font_entries = g_slist_prepend (font_family->font_entries, xface); xfontmap->n_fonts++; /* Save space by consolidating duplicated string */ pango_font_description_set_family_static (xface->description, font_family->family_name); xface->cached_fonts = NULL; xface->coverage = NULL; } if (ferror (infile)) g_warning ("Error reading '%s': %s", filename, g_strerror(errno)); goto out; error: if (xface) { g_free (xface->xlfd); if (xface->description) pango_font_description_free (xface->description); g_free (xface); } 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; char *p; 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. */ for (p = buffer; *p; p++) *p = g_ascii_tolower (*p); } 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_name; PangoStyle style; PangoVariant variant; PangoWeight weight; PangoStretch stretch; 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; PangoXFamily *font_family; PangoXFace *xface; PangoXSizeInfo *size_info; char *identifier; unsigned int i; /* 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_slice_new (PangoXSizeInfo); 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 */ family_name = pango_x_get_xlfd_field (fontname, XLFD_FAMILY, family_buffer); if (!family_name) return; style = PANGO_STYLE_NORMAL; if (pango_x_get_xlfd_field (fontname, XLFD_SLANT, slant_buffer)) { for (i=0; ifont_entries; while (tmp_list) { xface = tmp_list->data; if (pango_font_description_get_style (xface->description) == style && pango_font_description_get_weight (xface->description) == weight && pango_font_description_get_stretch (xface->description) == stretch && pango_font_description_get_variant (xface->description) == variant) return; tmp_list = tmp_list->next; } description = pango_font_description_new (); pango_font_description_set_family_static (description, font_family->family_name); pango_font_description_set_style (description, style); pango_font_description_set_weight (description, weight); pango_font_description_set_stretch (description, stretch); pango_font_description_set_variant (description, variant); xface = g_object_new (PANGO_X_TYPE_FACE, NULL); xface->description = description; xface->cached_fonts = NULL; xface->coverage = NULL; xface->xlfd = g_strconcat ("-*-", family_buffer, "-", weight_buffer, "-", slant_buffer, "-", set_width_buffer, "--*-*-*-*-*-*-*-*", NULL); font_family->font_entries = g_slist_append (font_family->font_entries, xface); xfontmap->n_fonts++; } /* Compare the tail of a to b */ static gboolean match_end (const char *a, const 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; 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++; } 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; } /** * pango_x_font_map_get_font_cache: * @font_map: a #PangoXFontMap. * * Obtains the font cache associated with the given font map. * * Return value: the #PangoXFontCache of @font_map. **/ 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 (old_font); } g_object_ref (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 (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; } Atom pango_x_fontmap_atom_from_name (PangoFontMap *fontmap, const char *atomname) { PangoXFontMap *xfm = PANGO_X_FONT_MAP(fontmap); gpointer found; Atom atom; found = g_hash_table_lookup (xfm->to_atom_cache, atomname); if (found) return (Atom)(GPOINTER_TO_UINT(found)); atom = XInternAtom (xfm->display, atomname, FALSE); g_hash_table_insert (xfm->to_atom_cache, g_strdup (atomname), (gpointer)atom); return atom; } G_CONST_RETURN char * pango_x_fontmap_name_from_atom (PangoFontMap *fontmap, Atom atom) { PangoXFontMap *xfm = PANGO_X_FONT_MAP(fontmap); gpointer found; char *name, *name2; found = g_hash_table_lookup (xfm->from_atom_cache, GUINT_TO_POINTER(atom)); if (found) return (const char *)found; name = XGetAtomName (xfm->display, atom); name2 = g_strdup (name); XFree (name); g_hash_table_insert (xfm->from_atom_cache, (gpointer)atom, name2); return name2; } /* * PangoXFace */ static PangoFontDescription * pango_x_face_describe (PangoFontFace *face) { PangoXFace *xface = PANGO_X_FACE (face); return pango_font_description_copy (xface->description); } static const char * pango_x_face_get_face_name (PangoFontFace *face) { PangoXFace *xface = PANGO_X_FACE (face); if (!xface->face_name) { PangoFontDescription *desc = pango_font_face_describe (face); pango_font_description_unset_fields (desc, PANGO_FONT_MASK_FAMILY | PANGO_FONT_MASK_SIZE); xface->face_name = pango_font_description_to_string (desc); pango_font_description_free (desc); } return xface->face_name; } static void pango_x_face_class_init (PangoFontFaceClass *class) { class->describe = pango_x_face_describe; class->get_face_name = pango_x_face_get_face_name; } GType pango_x_face_get_type (void) { static GType object_type = 0; if (G_UNLIKELY (!object_type)) { const GTypeInfo object_info = { sizeof (PangoFontFaceClass), (GBaseInitFunc) NULL, (GBaseFinalizeFunc) NULL, (GClassInitFunc) pango_x_face_class_init, NULL, /* class_finalize */ NULL, /* class_data */ sizeof (PangoXFace), 0, /* n_preallocs */ (GInstanceInitFunc) NULL, NULL /* value_table */ }; object_type = g_type_register_static (PANGO_TYPE_FONT_FACE, I_("PangoXFace"), &object_info, 0); } return object_type; } /* Cut and paste here to avoid an inter-module dependency */ static PangoCoverageLevel engine_shape_covers (PangoEngineShape *engine, PangoFont *font, PangoLanguage *language, gunichar wc) { g_return_val_if_fail (PANGO_IS_ENGINE_SHAPE (engine), PANGO_COVERAGE_NONE); g_return_val_if_fail (PANGO_IS_FONT (font), PANGO_COVERAGE_NONE); return PANGO_ENGINE_SHAPE_GET_CLASS (engine)->covers (engine, font, language, wc); } PangoCoverage * pango_x_face_get_coverage (PangoXFace *xface, PangoFont *font, PangoLanguage *language) { PangoXFont *xfont; PangoXFontMap *xfontmap = NULL; /* Quiet gcc */ PangoCoverage *result = NULL; Atom atom = None; if (xface) { if (xface->coverage) { pango_coverage_ref (xface->coverage); return xface->coverage; } xfont = (PangoXFont *)font; xfontmap = (PangoXFontMap *)pango_x_font_map_for_display (xfont->display); if (xface->xlfd) { const char *lang_str = language ? pango_language_to_string (language) : "*"; char *str = g_strconcat (lang_str, "|", xface->xlfd, NULL); result = pango_x_get_cached_coverage (xfontmap, str, &atom); g_free (str); } } if (!result) { PangoMap *shape_map; PangoEngineShape *engine; gunichar wc; result = pango_coverage_new (); shape_map = pango_x_get_shaper_map (language); engine = (PangoEngineShape *)pango_map_get_engine (shape_map, PANGO_SCRIPT_COMMON); for (wc = 0; wc < 65536; wc++) { PangoCoverageLevel level; level = engine_shape_covers (engine, font, language, wc); if (level != PANGO_COVERAGE_NONE) pango_coverage_set (result, wc, level); } if (atom) pango_x_store_cached_coverage (xfontmap, atom, result); } if (xface) { xface->coverage = result; pango_coverage_ref (result); } return result; } void pango_x_face_remove (PangoXFace *xface, PangoFont *font) { xface->cached_fonts = g_slist_remove (xface->cached_fonts, font); } /* * PangoXFontFamily */ static void pango_x_family_list_faces (PangoFontFamily *family, PangoFontFace ***faces, int *n_faces) { PangoXFamily *xfamily = PANGO_X_FAMILY (family); *n_faces = g_slist_length (xfamily->font_entries); if (faces) { GSList *tmp_list; int i = 0; *faces = g_new (PangoFontFace *, *n_faces); tmp_list = xfamily->font_entries; while (tmp_list) { (*faces)[i++] = tmp_list->data; tmp_list = tmp_list->next; } } } static G_CONST_RETURN char * pango_x_family_get_name (PangoFontFamily *family) { PangoXFamily *xfamily = PANGO_X_FAMILY (family); return xfamily->family_name; } static void pango_x_family_class_init (PangoFontFamilyClass *class) { class->list_faces = pango_x_family_list_faces; class->get_name = pango_x_family_get_name; } GType pango_x_family_get_type (void) { static GType object_type = 0; if (G_UNLIKELY (!object_type)) { const GTypeInfo object_info = { sizeof (PangoFontFamilyClass), (GBaseInitFunc) NULL, (GBaseFinalizeFunc) NULL, (GClassInitFunc) pango_x_family_class_init, NULL, /* class_finalize */ NULL, /* class_data */ sizeof (PangoXFamily), 0, /* n_preallocs */ (GInstanceInitFunc) NULL, NULL /* value_table */ }; object_type = g_type_register_static (PANGO_TYPE_FONT_FAMILY, I_("PangoXFamily"), &object_info, 0); } return object_type; }