* In particular, FT_Get_Advance() without the NO_HINTING flag seems to be
* buggy.
*
+ * FreeType works in 26.6 mode. Clients can decide to use that mode, and everything
+ * would work fine. However, we also abuse this API for performing in font-space,
+ * but don't pass the correct flags to FreeType. We just abuse the no-hinting mode
+ * for that, such that no rounding etc happens. As such, we don't set ppem, and
+ * pass NO_HINTING around. This seems to work best, until we go ahead and add a full
+ * load_flags API.
+ *
* - We don't handle / allow for emboldening / obliqueing.
*
* - In the future, we should add constructors to create fonts in font space?
{
FT_Face ft_face = (FT_Face) font_data;
-#ifdef HAVE_FT_FACE_GETCHARVARIANTINDEX
if (unlikely (variation_selector)) {
*glyph = FT_Face_GetCharVariantIndex (ft_face, unicode, variation_selector);
return *glyph != 0;
}
-#endif
*glyph = FT_Get_Char_Index (ft_face, unicode);
return *glyph != 0;
if (unlikely (FT_Get_Advance (ft_face, glyph, load_flags, &v)))
return 0;
+ if (font->x_scale < 0)
+ v = -v;
+
return (v + (1<<9)) >> 10;
}
if (unlikely (FT_Get_Advance (ft_face, glyph, load_flags, &v)))
return 0;
+ if (font->y_scale < 0)
+ v = -v;
+
/* Note: FreeType's vertical metrics grows downward while other FreeType coordinates
* have a Y growing upward. Hence the extra negation. */
return (-v + (1<<9)) >> 10;
void *user_data HB_UNUSED)
{
FT_Face ft_face = (FT_Face) font_data;
- int load_flags = FT_LOAD_DEFAULT;
+ int load_flags = FT_LOAD_DEFAULT | FT_LOAD_NO_HINTING;
if (unlikely (FT_Load_Glyph (ft_face, glyph, load_flags)))
return false;
*x = ft_face->glyph->metrics.horiBearingX - ft_face->glyph->metrics.vertBearingX;
*y = ft_face->glyph->metrics.horiBearingY - (-ft_face->glyph->metrics.vertBearingY);
+ if (font->x_scale < 0)
+ *x = -*x;
+ if (font->y_scale < 0)
+ *y = -*y;
+
return true;
}
void *user_data HB_UNUSED)
{
FT_Face ft_face = (FT_Face) font_data;
- int load_flags = FT_LOAD_DEFAULT;
+ int load_flags = FT_LOAD_DEFAULT | FT_LOAD_NO_HINTING;
if (unlikely (FT_Load_Glyph (ft_face, glyph, load_flags)))
return false;
blob = hb_blob_create ((const char *) ft_face->stream->base,
(unsigned int) ft_face->stream->size,
- /* TODO: We assume that it's mmap()'ed, but FreeType code
- * suggests that there are cases we reach here but font is
- * not mmapped. For example, when mmap() fails. No idea
- * how to deal with it better here. */
- HB_MEMORY_MODE_READONLY_MAY_MAKE_WRITABLE,
+ HB_MEMORY_MODE_READONLY,
ft_face, destroy);
face = hb_face_create (blob, ft_face->face_index);
hb_blob_destroy (blob);
return face;
}
+/**
+ * hb_ft_face_create_referenced:
+ * @ft_face:
+ *
+ *
+ *
+ * Return value: (transfer full):
+ * Since: 1.0
+ **/
+hb_face_t *
+hb_ft_face_create_referenced (FT_Face ft_face)
+{
+ FT_Reference_Face (ft_face);
+ return hb_ft_face_create (ft_face, (hb_destroy_func_t) FT_Done_Face);
+}
+
static void
hb_ft_face_finalize (FT_Face ft_face)
{
hb_font_set_scale (font,
(int) (((uint64_t) ft_face->size->metrics.x_scale * (uint64_t) ft_face->units_per_EM + (1<<15)) >> 16),
(int) (((uint64_t) ft_face->size->metrics.y_scale * (uint64_t) ft_face->units_per_EM + (1<<15)) >> 16));
+#if 0 /* hb-ft works in no-hinting model */
hb_font_set_ppem (font,
ft_face->size->metrics.x_ppem,
ft_face->size->metrics.y_ppem);
+#endif
return font;
}
+/**
+ * hb_ft_font_create_referenced:
+ * @ft_face:
+ *
+ *
+ *
+ * Return value: (transfer full):
+ * Since: 1.0
+ **/
+hb_font_t *
+hb_ft_font_create_referenced (FT_Face ft_face)
+{
+ FT_Reference_Face (ft_face);
+ return hb_ft_font_create (ft_face, (hb_destroy_func_t) FT_Done_Face);
+}
+
/* Thread-safe, lock-free, FT_Library */
static FT_Library ft_library;
-static inline
+#ifdef HB_USE_ATEXIT
+static
void free_ft_library (void)
{
FT_Done_FreeType (ft_library);
}
+#endif
static FT_Library
get_ft_library (void)
FT_Select_Charmap (ft_face, FT_ENCODING_UNICODE);
- assert (font->y_scale >= 0);
FT_Set_Char_Size (ft_face,
- font->x_scale, font->y_scale,
+ abs (font->x_scale), abs (font->y_scale),
0, 0);
#if 0
font->x_ppem * 72 * 64 / font->x_scale,
font->y_ppem * 72 * 64 / font->y_scale);
#endif
+ if (font->x_scale < 0 || font->y_scale < 0)
+ {
+ FT_Matrix matrix = { font->x_scale < 0 ? -1 : +1, 0,
+ 0, font->y_scale < 0 ? -1 : +1};
+ FT_Set_Transform (ft_face, &matrix, NULL);
+ }
ft_face->generic.data = blob;
ft_face->generic.finalizer = (FT_Generic_Finalizer) _release_blob;