/* Pango/Font Explorer * * This example demonstrates support for OpenType font features with * Pango attributes. The attributes can be used manually or via Pango * markup. * * It can also be used to explore available features in OpenType fonts * and their effect. * * If the selected font supports OpenType font variations, then the * axes are also offered for customization. */ #include #include #include #include #include #include "open-type-layout.h" #include "fontplane.h" #include "script-names.h" #include "language-names.h" #define MAKE_TAG(a,b,c,d) (unsigned int)(((a) << 24) | ((b) << 16) | ((c) << 8) | (d)) static GtkWidget *the_label; static GtkWidget *settings; static GtkWidget *description; static GtkWidget *font; static GtkWidget *script_lang; static GtkWidget *resetbutton; static GtkWidget *stack; static GtkWidget *the_entry; static GtkWidget *variations_heading; static GtkWidget *variations_grid; static GtkWidget *instance_combo; static GtkWidget *edit_toggle; typedef struct { unsigned int tag; const char *name; GtkWidget *icon; GtkWidget *dflt; GtkWidget *feat; } FeatureItem; static GList *feature_items; typedef struct { unsigned int start; unsigned int end; PangoFontDescription *desc; char *features; PangoLanguage *language; } Range; static GList *ranges; static void add_font_variations (GString *s); static void free_range (gpointer data) { Range *range = data; if (range->desc) pango_font_description_free (range->desc); g_free (range->features); g_free (range); } static int compare_range (gconstpointer a, gconstpointer b) { const Range *ra = a; const Range *rb = b; if (ra->start < rb->start) return -1; else if (ra->start > rb->start) return 1; else if (ra->end < rb->end) return 1; else if (ra->end > rb->end) return -1; return 0; } static void ensure_range (unsigned int start, unsigned int end, PangoFontDescription *desc, const char *features, PangoLanguage *language) { GList *l; Range *range; for (l = ranges; l; l = l->next) { Range *r = l->data; if (r->start == start && r->end == end) { range = r; goto set; } } range = g_new0 (Range, 1); range->start = start; range->end = end; ranges = g_list_insert_sorted (ranges, range, compare_range); set: if (range->desc) pango_font_description_free (range->desc); if (desc) range->desc = pango_font_description_copy (desc); g_free (range->features); range->features = g_strdup (features); range->language = language; } static const char * get_feature_display_name (unsigned int tag) { int i; static char buf[5] = { 0, }; if (tag == MAKE_TAG ('x', 'x', 'x', 'x')) return _("Default"); for (i = 0; i < G_N_ELEMENTS (open_type_layout_features); i++) { if (tag == open_type_layout_features[i].tag) return g_dpgettext2 (NULL, "OpenType layout", open_type_layout_features[i].name); } hb_tag_to_string (tag, buf); g_warning ("unknown OpenType layout feature tag: %s", buf); return buf; } static void update_display (void); static void set_inconsistent (GtkCheckButton *button, gboolean inconsistent) { gtk_check_button_set_inconsistent (GTK_CHECK_BUTTON (button), inconsistent); gtk_widget_set_opacity (gtk_widget_get_first_child (GTK_WIDGET (button)), inconsistent ? 0.0 : 1.0); } static void feat_pressed (GtkGestureClick *gesture, int n_press, double x, double y, GtkWidget *feat) { const guint button = gtk_gesture_single_get_current_button (GTK_GESTURE_SINGLE (gesture)); if (button == GDK_BUTTON_PRIMARY) { g_signal_handlers_block_by_func (feat, feat_pressed, NULL); if (gtk_check_button_get_inconsistent (GTK_CHECK_BUTTON (feat))) { set_inconsistent (GTK_CHECK_BUTTON (feat), FALSE); gtk_check_button_set_active (GTK_CHECK_BUTTON (feat), TRUE); } g_signal_handlers_unblock_by_func (feat, feat_pressed, NULL); } else if (button == GDK_BUTTON_SECONDARY) { gboolean inconsistent = gtk_check_button_get_inconsistent (GTK_CHECK_BUTTON (feat)); set_inconsistent (GTK_CHECK_BUTTON (feat), !inconsistent); } } static void feat_toggled_cb (GtkCheckButton *check_button, gpointer data) { set_inconsistent (check_button, FALSE); } static void add_check_group (GtkWidget *box, const char *title, const char **tags) { GtkWidget *label; GtkWidget *group; PangoAttrList *attrs; int i; group = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0); gtk_widget_set_halign (group, GTK_ALIGN_START); label = gtk_label_new (title); gtk_label_set_xalign (GTK_LABEL (label), 0.0); gtk_widget_set_halign (label, GTK_ALIGN_START); g_object_set (label, "margin-top", 10, "margin-bottom", 10, NULL); attrs = pango_attr_list_new (); pango_attr_list_insert (attrs, pango_attr_weight_new (PANGO_WEIGHT_BOLD)); gtk_label_set_attributes (GTK_LABEL (label), attrs); pango_attr_list_unref (attrs); gtk_box_append (GTK_BOX (group), label); for (i = 0; tags[i]; i++) { unsigned int tag; GtkWidget *feat; FeatureItem *item; GtkGesture *gesture; tag = hb_tag_from_string (tags[i], -1); feat = gtk_check_button_new_with_label (get_feature_display_name (tag)); set_inconsistent (GTK_CHECK_BUTTON (feat), TRUE); g_signal_connect (feat, "notify::active", G_CALLBACK (update_display), NULL); g_signal_connect (feat, "notify::inconsistent", G_CALLBACK (update_display), NULL); g_signal_connect (feat, "toggled", G_CALLBACK (feat_toggled_cb), NULL); gesture = gtk_gesture_click_new (); gtk_gesture_single_set_button (GTK_GESTURE_SINGLE (gesture), GDK_BUTTON_SECONDARY); g_signal_connect (gesture, "pressed", G_CALLBACK (feat_pressed), feat); gtk_widget_add_controller (feat, GTK_EVENT_CONTROLLER (gesture)); gtk_box_append (GTK_BOX (group), feat); item = g_new (FeatureItem, 1); item->name = tags[i]; item->tag = tag; item->icon = NULL; item->dflt = NULL; item->feat = feat; feature_items = g_list_prepend (feature_items, item); } gtk_box_append (GTK_BOX (box), group); } static void add_radio_group (GtkWidget *box, const char *title, const char **tags) { GtkWidget *label; GtkWidget *group; int i; GtkWidget *group_button = NULL; PangoAttrList *attrs; group = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0); gtk_widget_set_halign (group, GTK_ALIGN_START); label = gtk_label_new (title); gtk_label_set_xalign (GTK_LABEL (label), 0.0); gtk_widget_set_halign (label, GTK_ALIGN_START); g_object_set (label, "margin-top", 10, "margin-bottom", 10, NULL); attrs = pango_attr_list_new (); pango_attr_list_insert (attrs, pango_attr_weight_new (PANGO_WEIGHT_BOLD)); gtk_label_set_attributes (GTK_LABEL (label), attrs); pango_attr_list_unref (attrs); gtk_box_append (GTK_BOX (group), label); for (i = 0; tags[i]; i++) { unsigned int tag; GtkWidget *feat; FeatureItem *item; const char *name; tag = hb_tag_from_string (tags[i], -1); name = get_feature_display_name (tag); feat = gtk_check_button_new_with_label (name ? name : _("Default")); if (group_button == NULL) group_button = feat; else gtk_check_button_set_group (GTK_CHECK_BUTTON (feat), GTK_CHECK_BUTTON (group_button)); g_signal_connect (feat, "notify::active", G_CALLBACK (update_display), NULL); g_object_set_data (G_OBJECT (feat), "default", group_button); gtk_box_append (GTK_BOX (group), feat); item = g_new (FeatureItem, 1); item->name = tags[i]; item->tag = tag; item->icon = NULL; item->dflt = NULL; item->feat = feat; feature_items = g_list_prepend (feature_items, item); } gtk_box_append (GTK_BOX (box), group); } static void update_display (void) { GString *s; const char *text; gboolean has_feature; GtkTreeIter iter; GtkTreeModel *model; PangoFontDescription *desc; GList *l; PangoAttrList *attrs; PangoAttribute *attr; int ins, bound; guint start, end; PangoLanguage *lang; char *font_desc; char *features; text = gtk_editable_get_text (GTK_EDITABLE (the_entry)); if (gtk_label_get_selection_bounds (GTK_LABEL (the_label), &ins, &bound)) { start = g_utf8_offset_to_pointer (text, ins) - text; end = g_utf8_offset_to_pointer (text, bound) - text; } else { start = PANGO_ATTR_INDEX_FROM_TEXT_BEGINNING; end = PANGO_ATTR_INDEX_TO_TEXT_END; } desc = gtk_font_chooser_get_font_desc (GTK_FONT_CHOOSER (font)); s = g_string_new (""); add_font_variations (s); if (s->len > 0) { pango_font_description_set_variations (desc, s->str); g_string_free (s, TRUE); } font_desc = pango_font_description_to_string (desc); s = g_string_new (""); has_feature = FALSE; for (l = feature_items; l; l = l->next) { FeatureItem *item = l->data; if (!gtk_widget_is_sensitive (item->feat)) continue; if (GTK_IS_CHECK_BUTTON (item->feat)) { if (g_object_get_data (G_OBJECT (item->feat), "default")) { if (gtk_check_button_get_active (GTK_CHECK_BUTTON (item->feat)) && strcmp (item->name, "xxxx") != 0) { if (has_feature) g_string_append (s, ", "); g_string_append (s, item->name); g_string_append (s, " 1"); has_feature = TRUE; } } else { if (gtk_check_button_get_inconsistent (GTK_CHECK_BUTTON (item->feat))) continue; if (has_feature) g_string_append (s, ", "); g_string_append (s, item->name); if (gtk_check_button_get_active (GTK_CHECK_BUTTON (item->feat))) g_string_append (s, " 1"); else g_string_append (s, " 0"); has_feature = TRUE; } } } features = g_string_free (s, FALSE); if (gtk_combo_box_get_active_iter (GTK_COMBO_BOX (script_lang), &iter)) { hb_tag_t lang_tag; model = gtk_combo_box_get_model (GTK_COMBO_BOX (script_lang)); gtk_tree_model_get (model, &iter, 3, &lang_tag, -1); lang = pango_language_from_string (hb_language_to_string (hb_ot_tag_to_language (lang_tag))); } else lang = NULL; ensure_range (start, end, desc, features, lang); attrs = pango_attr_list_new (); for (l = ranges; l; l = l->next) { Range *range = l->data; attr = pango_attr_font_desc_new (range->desc); attr->start_index = range->start; attr->end_index = range->end; pango_attr_list_insert (attrs, attr); attr = pango_attr_font_features_new (range->features); attr->start_index = range->start; attr->end_index = range->end; pango_attr_list_insert (attrs, attr); if (range->language) { attr = pango_attr_language_new (range->language); attr->start_index = range->start; attr->end_index = range->end; pango_attr_list_insert (attrs, attr); } } gtk_label_set_text (GTK_LABEL (description), font_desc); gtk_label_set_text (GTK_LABEL (settings), features); gtk_label_set_text (GTK_LABEL (the_label), text); gtk_label_set_attributes (GTK_LABEL (the_label), attrs); g_free (font_desc); pango_font_description_free (desc); g_free (features); pango_attr_list_unref (attrs); } static PangoFont * get_pango_font (void) { PangoFontDescription *desc; PangoContext *context; desc = gtk_font_chooser_get_font_desc (GTK_FONT_CHOOSER (font)); context = gtk_widget_get_pango_context (font); return pango_context_load_font (context, desc); } typedef struct { hb_tag_t script_tag; hb_tag_t lang_tag; unsigned int script_index; unsigned int lang_index; } TagPair; static guint tag_pair_hash (gconstpointer data) { const TagPair *pair = data; return pair->script_tag + pair->lang_tag; } static gboolean tag_pair_equal (gconstpointer a, gconstpointer b) { const TagPair *pair_a = a; const TagPair *pair_b = b; return pair_a->script_tag == pair_b->script_tag && pair_a->lang_tag == pair_b->lang_tag; } static int script_sort_func (GtkTreeModel *model, GtkTreeIter *a, GtkTreeIter *b, gpointer user_data) { char *sa, *sb; int ret; gtk_tree_model_get (model, a, 0, &sa, -1); gtk_tree_model_get (model, b, 0, &sb, -1); ret = strcmp (sa, sb); g_free (sa); g_free (sb); return ret; } static void update_script_combo (void) { GtkListStore *store; hb_font_t *hb_font; int i, j, k; PangoFont *pango_font; GHashTable *tags; GHashTableIter iter; TagPair *pair; char *lang; hb_tag_t active; GtkTreeIter active_iter; gboolean have_active = FALSE; lang = gtk_font_chooser_get_language (GTK_FONT_CHOOSER (font)); G_GNUC_BEGIN_IGNORE_DEPRECATIONS active = hb_ot_tag_from_language (hb_language_from_string (lang, -1)); G_GNUC_END_IGNORE_DEPRECATIONS g_free (lang); store = gtk_list_store_new (4, G_TYPE_STRING, G_TYPE_UINT, G_TYPE_UINT, G_TYPE_UINT); pango_font = get_pango_font (); hb_font = pango_font_get_hb_font (pango_font); tags = g_hash_table_new_full (tag_pair_hash, tag_pair_equal, g_free, NULL); pair = g_new (TagPair, 1); pair->script_tag = HB_OT_TAG_DEFAULT_SCRIPT; pair->lang_tag = HB_OT_TAG_DEFAULT_LANGUAGE; g_hash_table_add (tags, pair); if (hb_font) { hb_tag_t tables[2] = { HB_OT_TAG_GSUB, HB_OT_TAG_GPOS }; hb_face_t *hb_face; hb_face = hb_font_get_face (hb_font); for (i= 0; i < 2; i++) { hb_tag_t scripts[80]; unsigned int script_count = G_N_ELEMENTS (scripts); hb_ot_layout_table_get_script_tags (hb_face, tables[i], 0, &script_count, scripts); for (j = 0; j < script_count; j++) { hb_tag_t languages[80]; unsigned int language_count = G_N_ELEMENTS (languages); hb_ot_layout_script_get_language_tags (hb_face, tables[i], j, 0, &language_count, languages); for (k = 0; k < language_count; k++) { pair = g_new (TagPair, 1); pair->script_tag = scripts[j]; pair->lang_tag = languages[k]; pair->script_index = j; pair->lang_index = k; g_hash_table_add (tags, pair); } } } } g_object_unref (pango_font); g_hash_table_iter_init (&iter, tags); while (g_hash_table_iter_next (&iter, (gpointer *)&pair, NULL)) { const char *langname; char langbuf[5]; GtkTreeIter tree_iter; if (pair->lang_tag == HB_OT_TAG_DEFAULT_LANGUAGE) langname = NC_("Language", "Default"); else { langname = get_language_name_for_tag (pair->lang_tag); if (!langname) { hb_tag_to_string (pair->lang_tag, langbuf); langbuf[4] = 0; langname = langbuf; } } gtk_list_store_insert_with_values (store, &tree_iter, -1, 0, langname, 1, pair->script_index, 2, pair->lang_index, 3, pair->lang_tag, -1); if (pair->lang_tag == active) { have_active = TRUE; active_iter = tree_iter; } } g_hash_table_destroy (tags); gtk_tree_sortable_set_default_sort_func (GTK_TREE_SORTABLE (store), script_sort_func, NULL, NULL); gtk_tree_sortable_set_sort_column_id (GTK_TREE_SORTABLE (store), GTK_TREE_SORTABLE_DEFAULT_SORT_COLUMN_ID, GTK_SORT_ASCENDING); gtk_combo_box_set_model (GTK_COMBO_BOX (script_lang), GTK_TREE_MODEL (store)); if (have_active) gtk_combo_box_set_active_iter (GTK_COMBO_BOX (script_lang), &active_iter); else gtk_combo_box_set_active_iter (GTK_COMBO_BOX (script_lang), 0); } static void update_features (void) { int i, j; GtkTreeModel *model; GtkTreeIter iter; guint script_index, lang_index; PangoFont *pango_font; hb_font_t *hb_font; GList *l; for (l = feature_items; l; l = l->next) { FeatureItem *item = l->data; gtk_widget_hide (item->feat); gtk_widget_hide (gtk_widget_get_parent (item->feat)); if (strcmp (item->name, "xxxx") == 0) gtk_check_button_set_active (GTK_CHECK_BUTTON (item->feat), TRUE); } /* set feature presence checks from the font features */ if (!gtk_combo_box_get_active_iter (GTK_COMBO_BOX (script_lang), &iter)) return; model = gtk_combo_box_get_model (GTK_COMBO_BOX (script_lang)); gtk_tree_model_get (model, &iter, 1, &script_index, 2, &lang_index, -1); pango_font = get_pango_font (); hb_font = pango_font_get_hb_font (pango_font); if (hb_font) { hb_tag_t tables[2] = { HB_OT_TAG_GSUB, HB_OT_TAG_GPOS }; hb_face_t *hb_face; char *feat; hb_face = hb_font_get_face (hb_font); for (i = 0; i < 2; i++) { hb_tag_t features[80]; unsigned int count = G_N_ELEMENTS(features); hb_ot_layout_language_get_feature_tags (hb_face, tables[i], script_index, lang_index, 0, &count, features); for (j = 0; j < count; j++) { #if 0 char buf[5]; hb_tag_to_string (features[j], buf); buf[4] = 0; g_print ("%s present in %s\n", buf, i == 0 ? "GSUB" : "GPOS"); #endif for (l = feature_items; l; l = l->next) { FeatureItem *item = l->data; if (item->tag == features[j]) { gtk_widget_show (item->feat); gtk_widget_show (gtk_widget_get_parent (item->feat)); if (GTK_IS_CHECK_BUTTON (item->feat)) { GtkWidget *def = GTK_WIDGET (g_object_get_data (G_OBJECT (item->feat), "default")); if (def) { gtk_widget_show (def); gtk_widget_show (gtk_widget_get_parent (def)); gtk_check_button_set_active (GTK_CHECK_BUTTON (def), TRUE); } else set_inconsistent (GTK_CHECK_BUTTON (item->feat), TRUE); } } } } } feat = gtk_font_chooser_get_font_features (GTK_FONT_CHOOSER (font)); if (feat) { for (l = feature_items; l; l = l->next) { FeatureItem *item = l->data; char buf[5]; char *p; hb_tag_to_string (item->tag, buf); buf[4] = 0; p = strstr (feat, buf); if (p) { if (GTK_IS_CHECK_BUTTON (item->feat) && g_object_get_data (G_OBJECT (item->feat), "default")) { gtk_check_button_set_active (GTK_CHECK_BUTTON (item->feat), p[6] == '1'); } else if (GTK_IS_CHECK_BUTTON (item->feat)) { set_inconsistent (GTK_CHECK_BUTTON (item->feat), FALSE); gtk_check_button_set_active (GTK_CHECK_BUTTON (item->feat), p[6] == '1'); } } } g_free (feat); } } g_object_unref (pango_font); } #define FixedToFloat(f) (((float)(f))/65536.0) static void adjustment_changed (GtkAdjustment *adjustment, GtkEntry *entry) { char *str; str = g_strdup_printf ("%g", gtk_adjustment_get_value (adjustment)); gtk_editable_set_text (GTK_EDITABLE (entry), str); g_free (str); update_display (); } static void entry_activated (GtkEntry *entry, GtkAdjustment *adjustment) { double value; char *err = NULL; value = g_strtod (gtk_editable_get_text (GTK_EDITABLE (entry)), &err); if (err != NULL) gtk_adjustment_set_value (adjustment, value); } static void unset_instance (GtkAdjustment *adjustment); typedef struct { guint32 tag; GtkAdjustment *adjustment; } Axis; static GHashTable *axes; static void add_font_variations (GString *s) { GHashTableIter iter; Axis *axis; char buf[G_ASCII_DTOSTR_BUF_SIZE]; const char *sep = ""; g_hash_table_iter_init (&iter, axes); while (g_hash_table_iter_next (&iter, (gpointer *)NULL, (gpointer *)&axis)) { char tag[5]; double value; hb_tag_to_string (axis->tag, tag); tag[4] = '\0'; value = gtk_adjustment_get_value (axis->adjustment); g_string_append_printf (s, "%s%s=%s", sep, tag, g_ascii_dtostr (buf, sizeof (buf), value)); sep = ","; } } static guint axes_hash (gconstpointer v) { const Axis *p = v; return p->tag; } static gboolean axes_equal (gconstpointer v1, gconstpointer v2) { const Axis *p1 = v1; const Axis *p2 = v2; return p1->tag == p2->tag; } static void add_axis (hb_face_t *hb_face, hb_ot_var_axis_info_t *ax, float value, int i) { GtkWidget *axis_label; GtkWidget *axis_entry; GtkWidget *axis_scale; GtkAdjustment *adjustment; Axis *axis; char name[20]; unsigned int name_len = 20; hb_ot_name_get_utf8 (hb_face, ax->name_id, HB_LANGUAGE_INVALID, &name_len, name); axis_label = gtk_label_new (name); gtk_widget_set_halign (axis_label, GTK_ALIGN_START); gtk_widget_set_valign (axis_label, GTK_ALIGN_BASELINE); gtk_grid_attach (GTK_GRID (variations_grid), axis_label, 0, i, 1, 1); adjustment = gtk_adjustment_new (value, ax->min_value, ax->max_value, 1.0, 10.0, 0.0); axis_scale = gtk_scale_new (GTK_ORIENTATION_HORIZONTAL, adjustment); gtk_scale_add_mark (GTK_SCALE (axis_scale), ax->default_value, GTK_POS_TOP, NULL); gtk_widget_set_valign (axis_scale, GTK_ALIGN_BASELINE); gtk_widget_set_hexpand (axis_scale, TRUE); gtk_widget_set_size_request (axis_scale, 100, -1); gtk_scale_set_draw_value (GTK_SCALE (axis_scale), FALSE); gtk_grid_attach (GTK_GRID (variations_grid), axis_scale, 1, i, 1, 1); axis_entry = gtk_entry_new (); gtk_widget_set_valign (axis_entry, GTK_ALIGN_BASELINE); gtk_editable_set_width_chars (GTK_EDITABLE (axis_entry), 4); gtk_grid_attach (GTK_GRID (variations_grid), axis_entry, 2, i, 1, 1); axis = g_new (Axis, 1); axis->tag = ax->tag; axis->adjustment = adjustment; g_hash_table_add (axes, axis); adjustment_changed (adjustment, GTK_ENTRY (axis_entry)); g_signal_connect (adjustment, "value-changed", G_CALLBACK (adjustment_changed), axis_entry); g_signal_connect (adjustment, "value-changed", G_CALLBACK (unset_instance), NULL); g_signal_connect (axis_entry, "activate", G_CALLBACK (entry_activated), adjustment); } typedef struct { char *name; unsigned int index; } Instance; static guint instance_hash (gconstpointer v) { const Instance *p = v; return g_str_hash (p->name); } static gboolean instance_equal (gconstpointer v1, gconstpointer v2) { const Instance *p1 = v1; const Instance *p2 = v2; return g_str_equal (p1->name, p2->name); } static void free_instance (gpointer data) { Instance *instance = data; g_free (instance->name); g_free (instance); } static GHashTable *instances; static void add_instance (hb_face_t *face, unsigned int index, GtkWidget *combo, int pos) { Instance *instance; hb_ot_name_id_t name_id; char name[20]; unsigned int name_len = 20; instance = g_new0 (Instance, 1); name_id = hb_ot_var_named_instance_get_subfamily_name_id (face, index); hb_ot_name_get_utf8 (face, name_id, HB_LANGUAGE_INVALID, &name_len, name); instance->name = g_strdup (name); instance->index = index; g_hash_table_add (instances, instance); gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), instance->name); } static void unset_instance (GtkAdjustment *adjustment) { if (instance_combo) gtk_combo_box_set_active (GTK_COMBO_BOX (instance_combo), 0); } static void instance_changed (GtkComboBox *combo) { char *text; Instance *instance; Instance ikey; int i; unsigned int coords_length; float *coords = NULL; hb_ot_var_axis_info_t *ai = NULL; unsigned int n_axes; PangoFont *pango_font = NULL; hb_font_t *hb_font; hb_face_t *hb_face; text = gtk_combo_box_text_get_active_text (GTK_COMBO_BOX_TEXT (combo)); if (text[0] == '\0') goto out; ikey.name = text; instance = g_hash_table_lookup (instances, &ikey); if (!instance) { g_print ("did not find instance %s\n", text); goto out; } pango_font = get_pango_font (); hb_font = pango_font_get_hb_font (pango_font); hb_face = hb_font_get_face (hb_font); n_axes = hb_ot_var_get_axis_infos (hb_face, 0, NULL, NULL); ai = g_new (hb_ot_var_axis_info_t, n_axes); hb_ot_var_get_axis_infos (hb_face, 0, &n_axes, ai); coords = g_new (float, n_axes); hb_ot_var_named_instance_get_design_coords (hb_face, instance->index, &coords_length, coords); for (i = 0; i < n_axes; i++) { Axis *axis; Axis akey; double value; value = coords[ai[i].axis_index]; akey.tag = ai[i].tag; axis = g_hash_table_lookup (axes, &akey); if (axis) { g_signal_handlers_block_by_func (axis->adjustment, unset_instance, NULL); gtk_adjustment_set_value (axis->adjustment, value); g_signal_handlers_unblock_by_func (axis->adjustment, unset_instance, NULL); } } out: g_free (text); g_clear_object (&pango_font); g_free (ai); g_free (coords); } static gboolean matches_instance (hb_face_t *hb_face, unsigned int index, unsigned int n_axes, float *coords) { float *instance_coords; unsigned int coords_length; int i; instance_coords = g_new (float, n_axes); coords_length = n_axes; hb_ot_var_named_instance_get_design_coords (hb_face, index, &coords_length, instance_coords); for (i = 0; i < n_axes; i++) if (instance_coords[i] != coords[i]) return FALSE; return TRUE; } static void add_font_plane (int i) { GtkWidget *plane; Axis *weight_axis; Axis *width_axis; Axis key; key.tag = MAKE_TAG('w','g','h','t'); weight_axis = g_hash_table_lookup (axes, &key); key.tag = MAKE_TAG('w','d','t','h'); width_axis = g_hash_table_lookup (axes, &key); if (weight_axis && width_axis) { plane = gtk_font_plane_new (weight_axis->adjustment, width_axis->adjustment); gtk_widget_set_size_request (plane, 300, 300); gtk_widget_set_halign (plane, GTK_ALIGN_CENTER); gtk_grid_attach (GTK_GRID (variations_grid), plane, 0, i, 3, 1); } } /* FIXME: This doesn't work if the font has an avar table */ static float denorm_coord (hb_ot_var_axis_info_t *axis, int coord) { float r = coord / 16384.0; if (coord < 0) return axis->default_value + r * (axis->default_value - axis->min_value); else return axis->default_value + r * (axis->max_value - axis->default_value); } static void update_font_variations (void) { GtkWidget *child; PangoFont *pango_font = NULL; hb_font_t *hb_font; hb_face_t *hb_face; unsigned int n_axes; hb_ot_var_axis_info_t *ai = NULL; float *design_coords = NULL; const int *coords; unsigned int length; int i; while ((child = gtk_widget_get_first_child (variations_grid))) gtk_grid_remove (GTK_GRID (variations_grid), child); instance_combo = NULL; g_hash_table_remove_all (axes); g_hash_table_remove_all (instances); pango_font = get_pango_font (); hb_font = pango_font_get_hb_font (pango_font); hb_face = hb_font_get_face (hb_font); n_axes = hb_ot_var_get_axis_infos (hb_face, 0, NULL, NULL); if (n_axes == 0) goto done; ai = g_new0 (hb_ot_var_axis_info_t, n_axes); design_coords = g_new (float, n_axes); hb_ot_var_get_axis_infos (hb_face, 0, &n_axes, ai); coords = hb_font_get_var_coords_normalized (hb_font, &length); for (i = 0; i < length; i++) design_coords[i] = denorm_coord (&ai[i], coords[i]); if (hb_ot_var_get_named_instance_count (hb_face) > 0) { GtkWidget *label; GtkWidget *combo; label = gtk_label_new ("Instance"); gtk_label_set_xalign (GTK_LABEL (label), 0); gtk_widget_set_halign (label, GTK_ALIGN_START); gtk_widget_set_valign (label, GTK_ALIGN_BASELINE); gtk_grid_attach (GTK_GRID (variations_grid), label, 0, -1, 2, 1); combo = gtk_combo_box_text_new (); gtk_widget_set_valign (combo, GTK_ALIGN_BASELINE); gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), ""); for (i = 0; i < hb_ot_var_get_named_instance_count (hb_face); i++) add_instance (hb_face, i, combo, i); for (i = 0; i < hb_ot_var_get_named_instance_count (hb_face); i++) { if (matches_instance (hb_face, i, n_axes, design_coords)) { gtk_combo_box_set_active (GTK_COMBO_BOX (combo), i + 1); break; } } gtk_grid_attach (GTK_GRID (variations_grid), combo, 1, -1, 2, 1); g_signal_connect (combo, "changed", G_CALLBACK (instance_changed), NULL); instance_combo = combo; } for (i = 0; i < n_axes; i++) add_axis (hb_face, &ai[i], design_coords[i], i); add_font_plane (n_axes); done: g_clear_object (&pango_font); g_free (ai); g_free (design_coords); } void font_features_font_changed (void) { update_script_combo (); update_features (); update_font_variations (); } void font_features_script_changed (void) { update_features (); update_display (); } void font_features_reset_features (void) { GList *l; gtk_label_select_region (GTK_LABEL (the_label), 0, 0); g_list_free_full (ranges, free_range); ranges = NULL; for (l = feature_items; l; l = l->next) { FeatureItem *item = l->data; if (GTK_IS_CHECK_BUTTON (item->feat)) { if (strcmp (item->name, "xxxx") == 0) gtk_check_button_set_active (GTK_CHECK_BUTTON (item->feat), TRUE); else { gtk_check_button_set_active (GTK_CHECK_BUTTON (item->feat), FALSE); set_inconsistent (GTK_CHECK_BUTTON (item->feat), TRUE); } } } } static char *text; static void switch_to_entry (void) { text = g_strdup (gtk_editable_get_text (GTK_EDITABLE (the_entry))); gtk_stack_set_visible_child_name (GTK_STACK (stack), "entry"); gtk_widget_grab_focus (the_entry); } static void switch_to_label (void) { g_free (text); text = NULL; gtk_stack_set_visible_child_name (GTK_STACK (stack), "label"); update_display (); } void font_features_toggle_edit (void) { if (strcmp (gtk_stack_get_visible_child_name (GTK_STACK (stack)), "label") == 0) switch_to_entry (); else switch_to_label (); } void font_features_stop_edit (void) { g_signal_emit_by_name (edit_toggle, "clicked"); } static gboolean entry_key_press (GtkEventController *controller, guint keyval, guint keycode, GdkModifierType modifiers, GtkEntry *entry) { if (keyval == GDK_KEY_Escape) { gtk_editable_set_text (GTK_EDITABLE (entry), text); font_features_stop_edit (); return GDK_EVENT_STOP; } return GDK_EVENT_PROPAGATE; } GtkWidget * do_font_features (GtkWidget *do_widget) { static GtkWidget *window = NULL; if (!window) { GtkBuilder *builder; GtkWidget *feature_list; GtkEventController *controller; builder = gtk_builder_new_from_resource ("/font_features/font-features.ui"); window = GTK_WIDGET (gtk_builder_get_object (builder, "window")); feature_list = GTK_WIDGET (gtk_builder_get_object (builder, "feature_list")); the_label = GTK_WIDGET (gtk_builder_get_object (builder, "label")); settings = GTK_WIDGET (gtk_builder_get_object (builder, "settings")); description = GTK_WIDGET (gtk_builder_get_object (builder, "description")); resetbutton = GTK_WIDGET (gtk_builder_get_object (builder, "reset")); font = GTK_WIDGET (gtk_builder_get_object (builder, "font")); script_lang = GTK_WIDGET (gtk_builder_get_object (builder, "script_lang")); stack = GTK_WIDGET (gtk_builder_get_object (builder, "stack")); the_entry = GTK_WIDGET (gtk_builder_get_object (builder, "entry")); edit_toggle = GTK_WIDGET (gtk_builder_get_object (builder, "edit_toggle")); controller = gtk_event_controller_key_new (); g_object_set_data_full (G_OBJECT (the_entry), "controller", g_object_ref (controller), g_object_unref); g_signal_connect (controller, "key-pressed", G_CALLBACK (entry_key_press), the_entry); gtk_widget_add_controller (the_entry, controller); add_check_group (feature_list, _("Kerning"), (const char *[]){ "kern", NULL }); add_check_group (feature_list, _("Ligatures"), (const char *[]){ "liga", "dlig", "hlig", "clig", "rlig", NULL }); add_check_group (feature_list, _("Letter Case"), (const char *[]){ "smcp", "c2sc", "pcap", "c2pc", "unic", "cpsp", "case",NULL }); add_radio_group (feature_list, _("Number Case"), (const char *[]){ "xxxx", "lnum", "onum", NULL }); add_radio_group (feature_list, _("Number Spacing"), (const char *[]){ "xxxx", "pnum", "tnum", NULL }); add_radio_group (feature_list, _("Fractions"), (const char *[]){ "xxxx", "frac", "afrc", NULL }); add_check_group (feature_list, _("Numeric Extras"), (const char *[]){ "zero", "nalt", "sinf", NULL }); add_check_group (feature_list, _("Character Alternatives"), (const char *[]){ "swsh", "cswh", "locl", "calt", "falt", "hist", "salt", "jalt", "titl", "rand", "subs", "sups", "ordn", "ltra", "ltrm", "rtla", "rtlm", "rclt", NULL }); add_check_group (feature_list, _("Positional Alternatives"), (const char *[]){ "init", "medi", "med2", "fina", "fin2", "fin3", "isol", NULL }); add_check_group (feature_list, _("Width Variants"), (const char *[]){ "fwid", "hwid", "halt", "pwid", "palt", "twid", "qwid", NULL }); add_check_group (feature_list, _("Alternative Stylistic Sets"), (const char *[]){ "ss01", "ss02", "ss03", "ss04", "ss05", "ss06", "ss07", "ss08", "ss09", "ss10", "ss11", "ss12", "ss13", "ss14", "ss15", "ss16", "ss17", "ss18", "ss19", "ss20", NULL }); add_check_group (feature_list, _("Mathematical"), (const char *[]){ "dtls", "flac", "mgrk", "ssty", NULL }); add_check_group (feature_list, _("Optical Bounds"), (const char *[]){ "opbd", "lfbd", "rtbd", NULL }); feature_items = g_list_reverse (feature_items); variations_heading = GTK_WIDGET (gtk_builder_get_object (builder, "variations_heading")); variations_grid = GTK_WIDGET (gtk_builder_get_object (builder, "variations_grid")); if (instances == NULL) instances = g_hash_table_new_full (instance_hash, instance_equal, NULL, free_instance); else g_hash_table_remove_all (instances); if (axes == NULL) axes = g_hash_table_new_full (axes_hash, axes_equal, NULL, g_free); else g_hash_table_remove_all (axes); font_features_font_changed (); g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window); g_object_unref (builder); update_display (); } if (!gtk_widget_get_visible (window)) gtk_window_present (GTK_WINDOW (window)); else gtk_window_destroy (GTK_WINDOW (window)); return window; }