RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-26 11:27:34 +00:00
Code Issues Activity Actions

LibPDF: Mark text rendering matrix dirty after changing it in text_begin

Browse source 
A certain PDF was drawing some text used `9 0 0 9 474.54 700.6801 Tm`
to set the text matrix to a matrix that scaled by 9 in one text object.

Then, after ending that text object, it had the following new text
object which contained nothing that invalidated the text matrix:

```
BT
/F1 7 Tf
/DeviceRGB CS
0 0 0 SC
10 TL
86.37849 21.908 Td
(Authorized licensed use limited to: ...) Tj
ET
```

`BT` did reset it as required, but since we didn't mark the matrix
as dirty, we never recomputed it and drew the additional text scaled
up 9x.
This commit is contained in:
Nico Weber 2024-01-10 09:45:23 -05:00 • committed by Andreas Kling
parent 5af02a914c
commit df5451a889
1 changed files with 1 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

1
Userland/Libraries/LibPDF/Renderer.cpp
View file

@ -416,6 +416,7 @@ RENDERER_HANDLER(text_begin)
{
m_text_matrix = Gfx::AffineTransform();
m_text_line_matrix = Gfx::AffineTransform();
m_text_rendering_matrix_is_dirty = true;
return {};
}