tree 5c16f5e305cfb3a4f03af58dd0c3315d8284bf5d
parent e77ee789faaf5697143027452df6669afede0a57
author Werner Lemberg <wl@gnu.org> 1502436860 +0200
committer Werner Lemberg <wl@gnu.org> 1502436860 +0200

[sfnt, truetype] Improve handling of missing sbits.

Requested by Behdad.

Modern bitmap-only SFNTs like `NotoColorEmoji.ttf' don't contain
entries in the bitmap strike(s) for empty glyphs.  Instead, they
rely that a space glyph gets created from the font's metrics data.
This commit makes FreeType behave accordingly.

* include/freetype/fterrdef.h (FT_Err_Missing_Bitmap): New error
code.

* src/sfnt/ttsbit.c (tt_sbit_decoder_load_image): Change error codes
to make a distinction between a missing bitmap in a composite and a
simple missing bitmap.

* src/truetype/ttgload.c (TT_Load_Glyph): For a missing bitmap (in a
bitmap-only font), synthesize an empty bitmap glyph if metrics are
available.