diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/cairo-ft-font.c | 38 |
1 files changed, 30 insertions, 8 deletions
diff --git a/src/cairo-ft-font.c b/src/cairo-ft-font.c index 1e2a18ee..f9ff0b10 100644 --- a/src/cairo-ft-font.c +++ b/src/cairo-ft-font.c @@ -543,8 +543,10 @@ _cairo_ft_unscaled_font_destroy (void *abstract_font) /* See comments in _ft_font_face_destroy about the "zombie" state * for a _ft_font_face. */ - if (unscaled->faces && !unscaled->faces->unscaled) + if (unscaled->faces && unscaled->faces->unscaled == NULL) { + assert (unscaled->faces->next == NULL); cairo_font_face_destroy (&unscaled->faces->base); + } } else { _font_map_release_face_lock_held (font_map, unscaled); } @@ -2233,9 +2235,10 @@ _cairo_ft_font_face_destroy (void *abstract_face) if (font_face == NULL) return; - /* When destroying the face created by cairo_ft_font_face_create_for_ft_face, + /* When destroying a face created by cairo_ft_font_face_create_for_ft_face, * we have a special "zombie" state for the face when the unscaled font - * is still alive but there are no public references to the font face. + * is still alive but there are no other references to a font face with + * the same FT_Face. * * We go from: * @@ -2249,6 +2252,8 @@ _cairo_ft_font_face_destroy (void *abstract_face) if (font_face->unscaled && font_face->unscaled->from_face && + font_face->next == NULL && + font_face->unscaled->faces == font_face && CAIRO_REFERENCE_COUNT_GET_VALUE (&font_face->unscaled->base.ref_count) > 1) { cairo_font_face_reference (&font_face->base); @@ -2394,12 +2399,21 @@ _cairo_ft_font_face_create (cairo_ft_unscaled_font_t *unscaled, font_face->ft_options.extra_flags == ft_options->extra_flags && cairo_font_options_equal (&font_face->ft_options.base, &ft_options->base)) { - if (font_face->base.status == CAIRO_STATUS_SUCCESS) - return cairo_font_face_reference (&font_face->base); + if (font_face->base.status) { + /* The font_face has been left in an error state, abandon it. */ + *prev_font_face = font_face->next; + break; + } - /* The font_face has been left in an error state, abandon it. */ - *prev_font_face = font_face->next; - break; + if (font_face->unscaled == NULL) { + /* Resurrect this "zombie" font_face (from + * _cairo_ft_font_face_destroy), switching its unscaled_font + * from owner to ownee. */ + font_face->unscaled = unscaled; + _cairo_unscaled_font_reference (&unscaled->base); + return &font_face->base; + } else + return cairo_font_face_reference (&font_face->base); } } @@ -2415,6 +2429,14 @@ _cairo_ft_font_face_create (cairo_ft_unscaled_font_t *unscaled, font_face->ft_options = *ft_options; + if (unscaled->faces && unscaled->faces->unscaled == NULL) { + /* This "zombie" font_face (from _cairo_ft_font_face_destroy) + * is no longer needed. */ + assert (unscaled->from_face && unscaled->faces->next == NULL); + cairo_font_face_destroy (&unscaled->faces->base); + unscaled->faces = NULL; + } + font_face->next = unscaled->faces; unscaled->faces = font_face; |