static cairo_status_t
_cairo_sub_font_map_glyph (cairo_sub_font_t *sub_font,
unsigned long scaled_font_glyph_index,
const char *text_utf8,
int text_utf8_len,
cairo_scaled_font_subsets_glyph_t *subset_glyph)
{
cairo_sub_font_glyph_t key, *sub_font_glyph;
cairo_status_t status;
_cairo_sub_font_glyph_init_key (&key, scaled_font_glyph_index);
sub_font_glyph = _cairo_hash_table_lookup (sub_font->sub_font_glyphs,
&key.base);
if (sub_font_glyph == NULL) {
uint32_t font_unicode;
char *font_utf8;
int font_utf8_len;
cairo_bool_t is_latin;
int latin_character;
status = _cairo_sub_font_glyph_lookup_unicode (sub_font->scaled_font,
scaled_font_glyph_index,
&font_unicode,
&font_utf8,
&font_utf8_len);
if (unlikely(status))
return status;
/* If the supplied utf8 is a valid single character, use it
* instead of the font lookup */
if (text_utf8 != NULL && text_utf8_len > 0) {
uint32_t *ucs4;
int ucs4_len;
status = _cairo_utf8_to_ucs4 (text_utf8, text_utf8_len,
&ucs4, &ucs4_len);
if (status == CAIRO_STATUS_SUCCESS) {
if (ucs4_len == 1) {
font_unicode = ucs4[0];
free (font_utf8);
font_utf8 = malloc (text_utf8_len + 1);
if (font_utf8 == NULL) {
free (ucs4);
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
}
memcpy (font_utf8, text_utf8, text_utf8_len);
font_utf8[text_utf8_len] = 0;
font_utf8_len = text_utf8_len;
}
free (ucs4);
}
}
/* If glyph is in the winansi encoding and font is not a user
* font, put glyph in the latin subset. If glyph is .notdef
* the latin subset is preferred but only if the latin subset
* already contains at least one glyph. We don't want to
* create a separate subset just for the .notdef glyph.
*/
is_latin = FALSE;
latin_character = -1;
if (sub_font->use_latin_subset &&
(! _cairo_font_face_is_user (sub_font->scaled_font->font_face)))
{
latin_character = _cairo_unicode_to_winansi (font_unicode);
if (latin_character > 0 ||
(latin_character == 0 && sub_font->num_glyphs_in_latin_subset > 0))
{
if (!sub_font->latin_char_map[latin_character]) {
sub_font->latin_char_map[latin_character] = TRUE;
is_latin = TRUE;
}
}
}
status = _cairo_sub_font_add_glyph (sub_font,
scaled_font_glyph_index,
is_latin,
latin_character,
font_unicode,
font_utf8,
font_utf8_len,
&sub_font_glyph);
if (unlikely(status))
return status;
}
subset_glyph->font_id = sub_font->font_id;
subset_glyph->subset_id = sub_font_glyph->subset_id;
if (sub_font_glyph->is_latin)
subset_glyph->subset_glyph_index = sub_font_glyph->latin_character;
else
subset_glyph->subset_glyph_index = sub_font_glyph->subset_glyph_index;
subset_glyph->is_scaled = sub_font->is_scaled;
subset_glyph->is_composite = sub_font->is_composite;
subset_glyph->is_latin = sub_font_glyph->is_latin;
subset_glyph->x_advance = sub_font_glyph->x_advance;
subset_glyph->y_advance = sub_font_glyph->y_advance;
status = _cairo_sub_font_glyph_map_to_unicode (sub_font_glyph,
text_utf8, text_utf8_len,
&subset_glyph->utf8_is_mapped);
subset_glyph->unicode = sub_font_glyph->unicode;
return status;
}
static cairo_status_t
_cairo_sub_font_map_glyph (cairo_sub_font_t *sub_font,
unsigned long scaled_font_glyph_index,
const char *utf8,
int utf8_len,
cairo_scaled_font_subsets_glyph_t *subset_glyph)
{
cairo_sub_font_glyph_t key, *sub_font_glyph;
cairo_status_t status;
_cairo_sub_font_glyph_init_key (&key, scaled_font_glyph_index);
sub_font_glyph = _cairo_hash_table_lookup (sub_font->sub_font_glyphs,
&key.base);
if (sub_font_glyph == NULL) {
cairo_scaled_glyph_t *scaled_glyph;
if (sub_font->num_glyphs_in_current_subset == sub_font->max_glyphs_per_subset)
{
cairo_scaled_font_subsets_glyph_t tmp_subset_glyph;
sub_font->current_subset++;
sub_font->num_glyphs_in_current_subset = 0;
/* Reserve first glyph in subset for the .notdef glyph
* except for Type 3 fonts */
if (! _cairo_font_face_is_user (sub_font->scaled_font->font_face)) {
status = _cairo_sub_font_map_glyph (sub_font, 0, NULL, -1, &tmp_subset_glyph);
if (unlikely (status))
return status;
}
}
_cairo_scaled_font_freeze_cache (sub_font->scaled_font);
status = _cairo_scaled_glyph_lookup (sub_font->scaled_font,
scaled_font_glyph_index,
CAIRO_SCALED_GLYPH_INFO_METRICS,
&scaled_glyph);
assert (status != CAIRO_INT_STATUS_UNSUPPORTED);
if (unlikely (status)) {
_cairo_scaled_font_thaw_cache (sub_font->scaled_font);
return status;
}
sub_font_glyph = _cairo_sub_font_glyph_create (scaled_font_glyph_index,
sub_font->current_subset,
sub_font->num_glyphs_in_current_subset,
scaled_glyph->metrics.x_advance,
scaled_glyph->metrics.y_advance);
_cairo_scaled_font_thaw_cache (sub_font->scaled_font);
if (unlikely (sub_font_glyph == NULL))
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
status = _cairo_sub_font_glyph_lookup_unicode (sub_font_glyph,
sub_font->scaled_font,
scaled_font_glyph_index);
if (unlikely (status)) {
_cairo_sub_font_glyph_destroy (sub_font_glyph);
return status;
}
status = _cairo_hash_table_insert (sub_font->sub_font_glyphs, &sub_font_glyph->base);
if (unlikely (status)) {
_cairo_sub_font_glyph_destroy (sub_font_glyph);
return status;
}
sub_font->num_glyphs_in_current_subset++;
if (sub_font->is_scaled) {
if (sub_font->num_glyphs_in_current_subset > sub_font->parent->max_glyphs_per_scaled_subset_used)
sub_font->parent->max_glyphs_per_scaled_subset_used = sub_font->num_glyphs_in_current_subset;
} else {
if (sub_font->num_glyphs_in_current_subset > sub_font->parent->max_glyphs_per_unscaled_subset_used)
sub_font->parent->max_glyphs_per_unscaled_subset_used = sub_font->num_glyphs_in_current_subset;
}
}
subset_glyph->font_id = sub_font->font_id;
subset_glyph->subset_id = sub_font_glyph->subset_id;
subset_glyph->subset_glyph_index = sub_font_glyph->subset_glyph_index;
subset_glyph->is_scaled = sub_font->is_scaled;
subset_glyph->is_composite = sub_font->is_composite;
subset_glyph->x_advance = sub_font_glyph->x_advance;
subset_glyph->y_advance = sub_font_glyph->y_advance;
status = _cairo_sub_font_glyph_map_to_unicode (sub_font_glyph,
utf8, utf8_len,
&subset_glyph->utf8_is_mapped);
subset_glyph->unicode = sub_font_glyph->unicode;
return status;
}
