[Bug 89416] UE4Editor crash after load project

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Wed Mar 4 12:28:05 PST 2015


https://bugs.freedesktop.org/show_bug.cgi?id=89416

--- Comment #6 from Matt Turner <mattst88 at gmail.com> ---
(In reply to Jason Ekstrand from comment #5)
> (In reply to Uriy Zhuravlev from comment #4)
> > Ok, alignment... maybe I can fix it.
> 
> Uriy,
> The problem here is that the code originally assumed that the destination
> would always be nicely aligned but the source may not.  When rgba8_copy
> function started getting used for texture *download* via ReadPixels and
> GetTexImage the assumption now fails and it is the source that is aligned
> and not the destination.  To fix this we need to do one of two things. 
> Either a) make the rgba8_copy function use unaligned reads (which would b
> slower) or b) make two versions of the rgba8_copy function: one for upload
> and one for download.

Basically, this all stems from the fact that there's no guarantee that the
pointer given to glReadPixels/glGetTexImage is suitably aligned?

Do you have time to fix this before the release on Friday? Trying to figure if
I need to work on this.

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