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[Octave-bug-tracker] [bug #33118] FLTK and Qt: text rotation fails for a
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From: |
Rik |
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Subject: |
[Octave-bug-tracker] [bug #33118] FLTK and Qt: text rotation fails for angles other than 90 degrees |
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Date: |
Tue, 20 Dec 2016 21:46:47 +0000 (UTC) |
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User-agent: |
Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:43.0) Gecko/20100101 Firefox/43.0 |
Follow-up Comment #10, bug #33118 (project octave):
I'm adding Pantxo to the CC list for this 5-year old bug because he often has
a good understanding of OpenGL. In this case, the issue seems to have been
traced back to the function
ft_text_renderer::render (text_element *elt, Matrix& box, int rotation)
which is in libinter/corefcn/ft-text-renderer.cc:1113.
It seems that as a first take, we could just calculate a rotation matrix (R)
and then use
pixels = R * pixels;
since the multiplication operator should be defined for uint8NDArray types.
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