RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-28 02:07:35 +00:00
Code Issues Activity Actions

LibGfx: Fix off-by-one in opentype cmap format 6 parsing

Browse source 
Fixes asserts when rendering 0000037.pdf, 0000116.pdf, 0000463.pdf,
0000483.pdf, 0000506.pdf, and 0000938.pdf in 0000.zip from the
pdfa dataset.
This commit is contained in:
Nico Weber 2023-10-26 08:37:41 -07:00 • committed by Andreas Kling
parent 2ef24e883c
commit 88bd7d83ad
1 changed files with 1 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

2
Userland/Libraries/LibGfx/Font/OpenType/Cmap.cpp
View file

@ -144,7 +144,7 @@ u32 Cmap::Subtable::glyph_id_for_code_point_table_6(u32 code_point) const
u32 entry_count = be_u16(m_slice.offset((u32)Table6Offsets::EntryCount));
u32 code_offset = code_point - first_code;
if (code_offset > entry_count)
if (code_offset >= entry_count)
return 0;
return be_u16(m_slice.offset((u32)Table6Offsets::GlyphIdArray + code_offset * 2));