[GEM-dev] [ pd-gem-Bugs-3570525 ] pix_resize doesn't work with yuv colourspace

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Bugs item #3570525, was opened at 2012-09-21 07:56
Message generated for change (Settings changed) made by zmoelnig
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Category: Pixes (pix_ objects)
Group: any operating system
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Nobody/Anonymous (nobody)
>Summary: pix_resize doesn't work with yuv colourspace

Initial Comment:
pix_resize donesn't resize an image with yuv colourspace. It still passes the image but with original size.

I dont know the Gem vertion but it is the one from Pd-Extended  0.43.1.extended-20120502



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Comment By: IOhannes m zmölnig (zmoelnig)
Date: 2013-01-20 10:06

Message:
nevertheless it would be interesting to know on which platform the problem
appears (or put otherwise: whether gluScaleImage() provides YUV-support on
OSX)

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Comment By: IOhannes m zmölnig (zmoelnig)
Date: 2013-01-20 10:06

Message:
Please provide as detailed information as possible including which
operating system (OS), CPU type, specific hardware, and the exact distro
and version of Pd itself, as well as the exact version of Gem, etc.
If you are using Pd-extended (which comes with Gem installed), you still
ought to provide the version-number of Gem (as printed out on the
Pd-console).

For example:
> Mac OS X 10.5.7/Intel
> Pd version 0.41.4-extended
> Gem 0.93.3 (as packaged with PdX)
> installed video backends: darwin, VLC
> installed movie backends: none
> installed image loaders: QT, ImageMagick

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Comment By: IOhannes m zmölnig (zmoelnig)
Date: 2013-01-20 10:05

Message:
that's most likely true.
[pix_resize] uses gluScaleImage() internally, which might not have support
for exotic colorspaces like YUV.
gluScaleImage() is probably not the most efficient scaler anyhow, so we
might want to consider replacing it with a self-written one, that supports
all of Gem's colorspaces.


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