Hi Robert and Christian,
Thank you for your answers. Now I understand why my expectations on
using the shallow copy were not working.
So I will just share the same osg::Image.
Also thanks for pointing out the allocation mode, it can be very useful
if I want to manually manage the _data pointer.
Thanks for your help,
Cheers
Pierre-Jean
Le 16/08/2016 à 13:21, Robert Osfield a écrit :
Hi Pierre-Jean,
The osg::Image constructor doesn't support shallow copy for the
internal image data, it will allocated a new image block and copy
across the data. This means for the image data itself it's effective
a deep copy.
A shallow copy would be technically possible by would force one to
start reference counting the image data. However, this doesn't make
any sense in the context of an osg::Image, if you want to share the
image data then you should be sharing the osg::Image object not the
internal data it holds.
My recommendation is not to do a shallow copy at all, but just share
the osg::Image.
Robert.
On 16 August 2016 at 10:27, Pierre-Jean Petitprez
<pierre-jean.petitp...@inria.fr> wrote:
Hi,
In my application I have two osg::Images, the second one is a shallow copy of
the first one thanks to the copy constructor.
Is it safe to delete the first image and keep only the second one, or should I
use deep copy instead?
My tests showed me that the data is still reachable but when looking at the
image destructor it clearly deallocates the data.
Thanks for enlightening me,
Cheers,
Pierre-Jean
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=68380#68380
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