Opened 14 years ago

Last modified 9 years ago

#22531 new defect

libdevil scaling filters do not work when reducing images

Reported by: jrmair@… Owned by: ryandesign (Ryan Carsten Schmidt)
Priority: Normal Milestone:
Component: ports Version: 1.8.1
Keywords: Cc:
Port: libdevil

Description

Hi,

The following code should generate a high-quality thumbnail (I am using the lanczos3 filter): http://gist.github.com/234637

However, the resulting thumbnail is of very poor quality, it is almost indistinguishable from the nearest neighbor algorithm.

This is particualrly strange behavior because in Debian Linux using the libdevil1c2 / libdevil-dev package the thumbnail quality is very high, as expected.

What is the difference between the Debian package and the macports libdevil package such that the filters work in Debian but not on macports?

It is very important that the high-quality filters work properly as thumbnailing is a very common application of DevIL.

Change History (5)

comment:1 Changed 14 years ago by jrmair@…

Cc: jrmair@… added

Cc Me!

comment:2 Changed 14 years ago by nerdling (Jeremy Lavergne)

Cc: jrmair@… removed
Owner: changed from macports-tickets@… to simon@…

comment:3 Changed 14 years ago by simon@…

Owner: changed from simon@… to macports-tickets@…

comment:5 Changed 9 years ago by jmroot (Joshua Root)

Owner: changed from macports-tickets@… to ryandesign@…
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