diff options
Diffstat (limited to 'pango2/pango-hbface.c')
| -rw-r--r-- | pango2/pango-hbface.c | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/pango2/pango-hbface.c b/pango2/pango-hbface.c index dbe68e17..61be8b38 100644 --- a/pango2/pango-hbface.c +++ b/pango2/pango-hbface.c @@ -48,6 +48,10 @@ /* {{{ Utilities */ +static GQuark quark_default_palette; +static GQuark quark_light_palette; +static GQuark quark_dark_palette; + static void get_name_from_hb_face (hb_face_t *face, hb_ot_name_id_t name_id, @@ -314,6 +318,8 @@ pango2_hb_face_finalize (GObject *object) { Pango2HbFace *self = PANGO2_HB_FACE (object); + if (self->palettes) + g_array_unref (self->palettes); g_free (self->faceid); if (self->face) hb_face_destroy (self->face); @@ -483,6 +489,10 @@ pango2_hb_face_class_init (Pango2HbFaceClass *class) GObjectClass *object_class = G_OBJECT_CLASS (class); Pango2FontFaceClass *face_class = PANGO2_FONT_FACE_CLASS (class); + quark_default_palette = g_quark_from_static_string (PANGO2_COLOR_PALETTE_DEFAULT); + quark_light_palette = g_quark_from_static_string (PANGO2_COLOR_PALETTE_LIGHT); + quark_dark_palette = g_quark_from_static_string (PANGO2_COLOR_PALETTE_DARK); + object_class->finalize = pango2_hb_face_finalize; object_class->get_property = pango2_hb_face_get_property; @@ -627,6 +637,73 @@ pango2_hb_face_set_matrix (Pango2HbFace *self, pango2_matrix_scale (self->transform, 1./self->x_scale, 1./self->y_scale); } +static unsigned int +find_palette_index_by_flag (hb_face_t *hbface, + hb_ot_color_palette_flags_t flag) +{ + unsigned int n_palettes; + + n_palettes = hb_ot_color_palette_get_count (hbface); + for (unsigned int i = 0; i < n_palettes; i++) + { + if (hb_ot_color_palette_get_flags (hbface, i) & flag) + return i; + } + + return 0; +} + +unsigned int +pango2_hb_face_get_palette_index (Pango2HbFace *self, + GQuark palette) +{ + const char *name; + + if (palette == 0) + return 0; + + if (self->palettes) + { + for (unsigned int i = 0; i < self->palettes->len; i++) + { + PaletteMapEntry *entry = &g_array_index (self->palettes, PaletteMapEntry, i); + + if (entry->name == palette) + return entry->index; + } + } + + if (palette == quark_default_palette) + return 0; + + ensure_hb_face (self); + + if (!hb_ot_color_has_palettes (self->face)) + return 0; + + /* look for a name of the form "paletteN" */ + name = g_quark_to_string (palette); + if (g_str_has_prefix (name, "palette") && g_ascii_isdigit (name[strlen ("palette")])) + { + const char *p; + char *end; + unsigned int index; + + p = name + strlen ("palette"); + index = (unsigned int) g_ascii_strtoull (p, &end, 10); + if (*end == '\0') + return index; + } + + /* look for "light", "dark" */ + if (palette == quark_light_palette) + return find_palette_index_by_flag (self->face, HB_OT_COLOR_PALETTE_FLAG_USABLE_WITH_LIGHT_BACKGROUND); + else if (palette == quark_dark_palette) + return find_palette_index_by_flag (self->face, HB_OT_COLOR_PALETTE_FLAG_USABLE_WITH_DARK_BACKGROUND); + + return 0; +} + /* }}} */ /* {{{ Public API */ @@ -877,6 +954,104 @@ pango2_hb_face_get_transform (Pango2HbFace *self) return self->transform; } +static gboolean +name_is_valid (const char *name) +{ + if (!name) + return FALSE; + + /* First character must be a letter. */ + if ((name[0] < 'A' || name[0] > 'Z') && + (name[0] < 'a' || name[0] > 'z')) + return FALSE; + + for (const char *p = name; *p != 0; p++) + { + const char c = *p; + + if (c != '-' && c != '_' && + (c < '0' || c > '9') && + (c < 'A' || c > 'Z') && + (c < 'a' || c > 'z')) + return FALSE; + } + + return TRUE; +} + +/** + * pango2_hb_face_set_palette_name: + * @self: a `Pango2HbFace` + * @name: the palette name to set + * @index: index of the palette + * + * Sets up a palette name for one of the palettes of the `PangoHbFace`. + * + * After this call, using the name with a palette attribute + * or with [method@Pango2.Context.set_palette] will use the + * given palette index for @self. + */ +void +pango2_hb_face_set_palette_name (Pango2HbFace *self, + const char *name, + unsigned int index) +{ + PaletteMapEntry add; + + g_return_if_fail (PANGO2_IS_HB_FACE (self)); + g_return_if_fail (name_is_valid (name)); + + add.name = g_quark_from_string (name); + add.index = index; + + if (self->palettes == NULL) + self->palettes = g_array_new (FALSE, FALSE, sizeof (PaletteMapEntry)); + + for (int i = 0; i < self->palettes->len; i++) + { + PaletteMapEntry *entry = &g_array_index (self->palettes, PaletteMapEntry, i); + if (entry->index == add.index) + { + entry->name = add.name; + return; + } + } + + g_array_append_val (self->palettes, add); +} + +/** + * pango2_hb_face_get_palette_name: + * @self: a `PangoHbFace` + * @index: index of the palette + * + * Gets the name for the palette with the given index in @self. + * + * Note that this function only returns names that have been + * set up by a prior call of [method@Pang2.HbFace.set_palette_name]. + * It does not return the predefined "paletteN" names. + * + * Returns: (nullable): the palette name + */ +const char * +pango2_hb_face_get_palette_name (Pango2HbFace *self, + unsigned int index) +{ + g_return_val_if_fail (PANGO2_IS_HB_FACE (self), NULL); + + if (self->palettes == NULL) + return NULL; + + for (int i = 0; i < self->palettes->len; i++) + { + PaletteMapEntry *entry = &g_array_index (self->palettes, PaletteMapEntry, i); + if (entry->index == index) + return g_quark_to_string (entry->name); + } + + return NULL; +} + /* }}} */ /* {{{ Pango2HbFaceBuilder */ @@ -1025,6 +1200,7 @@ pango2_hb_face_builder_new (Pango2HbFace *face) builder->n_variations = face->n_variations; builder->name = g_strdup (font_face->name); builder->description = pango2_font_description_copy_static (font_face->description); + pango2_font_description_unset_fields (builder->description, PANGO2_FONT_MASK_FACEID); return builder; } @@ -1043,6 +1219,7 @@ pango2_hb_face_builder_get_face (Pango2HbFaceBuilder *builder) Pango2HbFace *self; self = g_object_new (PANGO2_TYPE_HB_FACE, NULL); + if (builder->face) { self->file = g_strdup (builder->face->file); @@ -1051,6 +1228,9 @@ pango2_hb_face_builder_get_face (Pango2HbFaceBuilder *builder) if (builder->face->face) self->face = hb_face_reference (builder->face->face); pango2_hb_face_set_language_set (self, builder->face->languages); + + if (builder->face->palettes) + self->palettes = g_array_copy (builder->face->palettes); } else if (builder->hb_face) { |