On 2012-01-23 21:16:01 -0600 Eric Wasylishen <[email protected]>
wrote:
Thanks for the info.. this is bad because it sounds like the
NSCopyBits is
causing flickering.
I have another debugging request:
-update gui/back again
-verify the flickering is back.
-open back/Source/cairo/CairoContext.m
and change this section:
//# define _CAIRO_SURFACE_CLASSNAME XGCairoSurface
//# include "cairo/XGCairoSurface.h"
//# define _CAIRO_SURFACE_CLASSNAME XGCairoXImageSurface
//# include "cairo/XGCairoXImageSurface.h"
# define _CAIRO_SURFACE_CLASSNAME XGCairoModernSurface
# include "cairo/XGCairoModernSurface.h"
to this:
//# define _CAIRO_SURFACE_CLASSNAME XGCairoSurface
//# include "cairo/XGCairoSurface.h"
# define _CAIRO_SURFACE_CLASSNAME XGCairoXImageSurface
# include "cairo/XGCairoXImageSurface.h"
//# define _CAIRO_SURFACE_CLASSNAME XGCairoModernSurface
//# include "cairo/XGCairoModernSurface.h"
-make and install back, and try fisicalab again.
This change solves the problem.
I'm assuing you're using the cairo backend. I'm curious if changing
from
XGCairoModernSurface to XGCairoXImageSurface will fix the problem.
Also it
might be worth trying art or xlib, and see if you still get the same
flickering.
Yes, I'm using cairo. And with xlib and art all works fine. The
problem is only with
cairo. I don't understand this problem. But, for example, the
fisicalab's chalkboard
works fine. Even when is basically the same. An NSView with a lot of
buttons that
can display images. The only difference is that its content isn't
copied from another
window. And why this problem occurs only when I move the scrollbar to
down?
Thanks.
Thanks
Eric
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