[Poppler-bugs] [Bug 22138] [PATCH] Image quality worse compared to Adobe Reader

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=22138

Adrian Johnson <ajohnson at redneon.com> changed:

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--- Comment #39 from Adrian Johnson <ajohnson at redneon.com> ---
Created attachment 70423
  --> https://bugs.freedesktop.org/attachment.cgi?id=70423&action=edit
Implement bilinear image scaling in splash

Here's the updated patch that switches between bilinear and nearest depending
on the interpolate flag and scale factor.

This fixes the regression in altona_technical_1v2_x3.pdf and 
http://bugsfiles.kde.org/attachment.cgi?id=12083.

I have not been able to figure out how to fix
https://bugs.freedesktop.org/attachment.cgi?id=70393. It seems to be caused by
an smask with a transfer function. The transfer function messes up the smooth
interpolation introduced by the bilinear scaling. The output is very similar to
acroread so I'm not really sure what else I can do.

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