Re: Pixmap performance

Here is one more requirement,

     In a window I am having (say) 100 pixmap images each of resolution
100x100.  I will be dragging each of them frequently. I am having  a celerom
300A PC with 128 MB RAM. What will be the performance in terms of speed, memory
and flickering.

The description given in "Memory Management" section of Gdk-Pixbuf API reference
was not satisfying.

I wanted to clarify all my doubts before I actually start., so that I can choose
a better design.

Deekshit M

"Cupitt, John" wrote:

> Deekshit Mantampady wrote:
> >        I have a small doubt regarding pixmap. I have a pixmap with
> resolution of
> >
> > 10000x10000 pixels. How fast the image will be rendered ? Assuming I
> have a
> > scrolled window of size 100x100. How about the scrolled
> performace(Will it be
> > smooth)..? If this is not the efficient way to display large images,
> is there
> > any better alternative for the same.
> Hi Deekshit, my app displays large images.
> I mmap() the image file and then for each expose event render just the
> exposed section from disc to the display. It's quite fast and smooth.
> I did my own code, but I think the new gdk-pixbuf library in gtk2 will
> render sections of images. The trick (if there is one) is just to not
> ever deal with the whole thing at once.

That is a better one.

> John


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