Hello list, I'm trying to use XShmCreatePixmap() in combination with XCopyArea() to achieve something resembling an XShmGetSubImage() for copying damaged areas piecemeal out of the root window into a shmseg for a screencap tool.
It seems like no matter what I do, the XCopyArea() never actually writes to the shmseg. If instead I use XShmGetImage() with the same source drawable (root) and an XShmImage created from the very same shminfo as the XShmPixmap, my shmseg gets written to just fine - but it fills the entire XShmImage on every update which I'd like to avoid. Does this sound familiar to anyone experienced using XShmCreatePixmap() with XCopyArea()? Do I need to do something special with the GC to make things happen? I'm using the DefaultGC from the same root window as the CopyArea source, which is also the drawable supplied to XShmCreatePixmap(). I'm not seeing any errors, the XCopyArea() seems to be happening, but the shmseg just isn't being modified. My server reports ZPixmap as the supported XShmPixmapFormat(), it's a garden variety xorg-modesetting on i915. Thanks, Vito Caputo _______________________________________________ xorg-devel@lists.x.org: X.Org development Archives: http://lists.x.org/archives/xorg-devel Info: https://lists.x.org/mailman/listinfo/xorg-devel