Re: [GtkGLExt] display lists sharing problem with texturing enabled

[Luca Cappa <luca cappa i-medlab com>]

Hello,


Florent Teichteil wrote:

> Hi,
>
> I have too problems with gtkglextmm.
>
> 1) The gtkglextmm widget is not invalidated (redrawn) if the size of the
> gtkglextmm area is too small. I use this instruction (from the
> gtkglextmm examples): get_window()->invalidate_rect(get_allocation(),
> false);
>  

I think you should instead use this code to accomplish that:

   Gdk::Rectangle lRect = get_allocation ();
   get_window ()->invalidate_rect (Gdk::Rectangle (0, 0, 
lRect.get_width (), lRect.get_height ()),
       false);

> 2) I have multiple gtkglextmm widgets that share the same display lists
> and textures. In fact, textures are compiled in display lists so that I
> only call display lists to draw the scene. All work fine, but if I
> enable texturing and at the time I am switching to the view where the
> display lists were initialized, I get the following message in the console:
>
> Couldn't alloc placeholder sz 40000 ofs 7c0000
> Memory heap 0x8e11ac0:
>  Offset:00000000, Size:00040000, U.
>  Offset:00040000, Size:00040000, U.
>  Offset:00080000, Size:00040000, U.
>  Offset:000c0000, Size:00040000, U.
>  Offset:00100000, Size:00040000, U.
>  Offset:00140000, Size:00040000, U.
>  Offset:00180000, Size:00040000, U.
>  Offset:001c0000, Size:00040000, U.
>  Offset:00200000, Size:00040000, U.
>  Offset:00240000, Size:00040000, U.
>  Offset:00280000, Size:00040000, U.
>  Offset:002c0000, Size:00040000, U.
>  Offset:00300000, Size:00040000, U.
>  Offset:00340000, Size:00040000, U.
>  Offset:00380000, Size:00040000, U.
>  Offset:003c0000, Size:00040000, U.
>  Offset:00400000, Size:00400000, U.
>  Offset:00800000, Size:00040000, U.
>  Offset:00840000, Size:00040000, U.
>  Offset:00880000, Size:00040000, U.
>  Offset:008c0000, Size:00040000, U.
>  Offset:00900000, Size:00040000, U.
> End of memory blocks
> No segmentation fault happens and the program just goes on. Note that
>  
>
> this problem does not occur if I disable texturing.
>
> Any ideas ?
>  
Try using BUGLE to track down the problem. It is hard to say why that 
happen :-)


Gretings,
Luca