[cairo] Bug in _cairo_xlib_surface_create_similar
cworth at cworth.org
Thu May 18 14:27:59 PDT 2006
On Fri, 19 May 2006 08:26:08 +1200, Robert O'Callahan wrote:
> My response was (and is) that the patch doesn't do that. If we can't
> match the visual and depth, we fall back to
> _cairo_xlib_surface_create_similar_with_format, i.e. the existing
Sorry about that. I should have looked closer at the patch and seen
that that is obviously the case.
I've now pushed the patch out.
Author: Robert O'Callahan <rocallahan at novell.com>
Date: Fri May 19 08:26:08 2006 +1200
[xlib] Have create_similar try harder to create the right surface
I recently discovered that cairo_create_similar on a 16-bit xlib surface
creates a surface backed by a 24-bit pixmap. This results in absymal
performance --- I can actually watch a copy from the similar to the
original move down the screen, on my dual Xeon, NVidia vendor driver
machine. It also means xlib-based code like GTK themes can't render to
the surface because it doesn't match the screen depth.
The attached patch makes _cairo_xlib_surface_create_similar match the
characteristics of the input surface as closely as I know how, and fixes
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