Re: Gdk::Pixbuf::create_from_data strange behaviour

[Paul Davis <pjdavis engineering uiowa edu>]

Paul Davis wrote:

> Aurélien KAMEL wrote:
>
> > Hello,
> >
> > I'm creating a pixbuf from a pixel array like this :
> >
> > Glib::RefPtr<Gdk::Pixbuf> =
> >     Gdk::Pixbuf::create_from_data(array,Gdk::COLORSPACE_RGB,false, 
> > 8,sizeX,sizeY,sizeX*3);
> >
> > The problem is that if after this call to create_from_data() I do a  
> > free() on the pixel array then the program crash when I try to use  
> > the Pixbuf... If I don't free() the pixel array then I can use my  
> > Pixbuf normally, display it etc.
> It sure doesn't.  Which in some cases is a good thing.
>
> If you're worried about freeing the memmory, you can use this form:
> file:///usr/share/doc/libgtkmm-2.4-doc/reference/html/classGdk_1_1Pixbuf.html#e3 

It'd help if I referenced the online docs:
http://www.gtkmm.org/docs/gtkmm-2.4/docs/reference/html/classGdk_1_1Pixbuf.html#526129d481ff04e8953c18b0b12c4c55

> and pass it a functor to delete the data when the pixbuf dies.
>
> > So, create_from_data() don't copy the pixel array in the Pixbuf ?
> >
> > And, I see that there is a create_from_inline() which take as  
> > argument a bool copy_pixels ? Can I use this function (how?) so that  
> > I can free() the pixel array after Pixbuf was created ?
> Judging from the docs, this is meant for use with things like XPM 
> data.  The actual image data gets compiled into the program.  Which 
> chances are is not what you want.
>
> > Thanks for your help :)
> >
> > Aurelien
> >
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