https://bugs.freedesktop.org/show_bug.cgi?id=46631
Neil Roberts <[email protected]> changed: What |Removed |Added ---------------------------------------------------------------------------- Attachment #57646|0 |1 is obsolete| | --- Comment #4 from Neil Roberts <[email protected]> 2012-02-26 09:11:06 PST --- Created attachment 57666 --> https://bugs.freedesktop.org/attachment.cgi?id=57666 readpix: Don't use the fast path for luminance types When deciding whether to use the fast memcpy path for the fallback implementation of glReadPixels, it now explicitly ignores luminance types because in that case the conversion to and from RGB does not end up with exactly the same values. Although it seems counter-intuitive, the spec implies that even when the source and dest formats are a luminance type, it will temporarily convert to RGB by storing the luminance value in every component and then convert back to luminance by adding all of the components together. This effectively means the luminance values must be multiplied by three to conform to the spec. -- Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug. _______________________________________________ mesa-dev mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/mesa-dev
