[gdal-dev] Setting "INIT_DEST" to nan on windows

[Even Rouault]

Selon Kyle Shannon <ksshannon at gmail.com>:

> I did have to set the padfNoDataImag array as well, so I am one step
> closer.  My new issue is ownership of my psWarpOptions.  I assume that since
> I create it, and the warp api tutorial implies that is it mine, I destroy it
> with GDALDestroyWarpOptions().  My problem is that AutoCreateWarpedVRT
> appears to be stepping on my warp options when it destroys it's own copy.
>
> I call AutoCreateWarpedVRT() and that function calls
> GDALCloneWarpOptions().  When AutoCreateWarpedVRT destroys the copy it owns,
> it appears to be stepping on my copy, and when I call
> GDALDestroyWarpOptions(), I get a seg fault.  Am I doing something wrong?

Difficult to say without seeing your code. Could you post a small
self-sufficient code snippet that demonstrates your issue ?

By reviewing the code, one potential issue would be if you try to free the
pTransformerArg field by yourself, as it is freed by the destructor of the
VRTWarpedDataset. But if you just use GDALDestroyWarpOptions(), it should work
OK

>
> kss
>
>
>
> /**
>  *
>  * Kyle Shannon
>  * ksshannon at gmail.com
>  *
>  */
>
>
>
>
> On Mon, May 9, 2011 at 15:43, Even Rouault
> <even.rouault at mines-paris.org>wrote:
>
> > Le lundi 09 mai 2011 23:30:05, Kyle Shannon a écrit :
> > > Thanks Even,
> > > If that is the case, are there other values in psWarpOptions I *have* to
> > > set?  I can't find docs discussing that.
> >
> > I don't think so, but you'll just have to try... I'm not  surprised the
> > docs
> > don't talk about NaN. It is a corner case, and likely not really well
> > supported in all places.
> >
>