Re: Re-drawing GtkDrawingArea surface on motion-notify-event

[Joël Krähemann <jkraehemann gmail com>]

Hi

If you do it using cairo you might be interested in the following function.

cairo_image_surface_get_data()

You get the pixels stored in your picture. It can be restored using memcpy()
what is actually quiet fast.

Bests,
Joël


On Tue, Mar 21, 2017 at 8:26 AM, F.Reiter <franz reiter cadcam co at> wrote:
> Hallo,
> for lightning-fast, xor, rubberbanding, zooming, clipping ..
> why not consider Open-GL ?
> Franz
> (https://github.com/gcad3d/gcad3d)
>
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