[Bf-committers] Windows (XP) refuses to allocate > 1 GB

[Ilyes Gouta]

Hi!

You can use the VirtualAlloc class of functions or better use a memory
mapped region through CreateFileMapping and MapViewOfFile. Please note
that the former will allocate the memory on the swap file then the
latter will map that to a memory pointer so that you can access it as
a normal memory block. It doesn't matter how much you have RAM, this
will work providing you have enough disk space.

Regards,
Ilyes Gouta (blenderx)

On 6/29/06, Ton Roosendaal <ton at blender.org> wrote:
> Hi,
>
> See the thread here:
> http://projects.blender.org/tracker/?
> func=detail&atid=264&aid=4539&group_id=9
>
> And with some googling I found this:
> http://www.stata.com/support/faqs/win/winmemory.html
>
> Apparently XP with SP2 refuses to give larger blocks than a gig. With
> our floatbuffer approach that limits rendering to a resulution of about
> 6000x9000 pixels.
>
> So... is this true? Should we move to a tilebased image structure or
> so? That was something I had in mind anyway, for example to be able to
> cache images (textures, shadowbuffers) to files while rendering.
>
> -Ton-
>
> ------------------------------------------------------------------------
> --
> Ton Roosendaal  Blender Foundation ton at blender.org
> http://www.blender.org
>
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