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LibGfx/OpenType: Undo minor deletion in #23225

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Check if we have a cmap before dereferencing it again.

Fixes a crash on page 8 of 0000188.pdf now that the font no
longer fails to load to due to a missing name table.

Looks like this is a Type2 truetype font, where we don't provide
an external cmap. How this font is supposed to work without a cmap
I don't know -- but for now, we no longer crash on it, and draw
some of the text with the previous font (which happens to work
fine in this particular case).
This commit is contained in:
Nico Weber 2024-02-20 12:33:13 -05:00 • committed by Andreas Kling
parent 08381b20e0
commit e8133c8297
1 changed files with 2 additions and 0 deletions
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Userland/Libraries/LibGfx/Font/OpenType/Font.cpp
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@ -278,6 +278,8 @@ ErrorOr<NonnullRefPtr<Font>> Font::try_load_from_offset(ReadonlyBytes buffer, u3
hmtx = TRY(Hmtx::from_slice(opt_hmtx_slice.value(), maxp.num_glyphs(), hhea.number_of_h_metrics()));
}
if (!options.external_cmap && !opt_cmap_slice.has_value())
return Error::from_string_literal("Font is missing Cmap");
NonnullOwnPtr<CharCodeToGlyphIndex> cmap = options.external_cmap ? options.external_cmap.release_nonnull() : TRY(CmapCharCodeToGlyphIndex::from_slice(opt_cmap_slice.value()));
Optional<Loca> loca;