Mario Kleiner
ad8b0e8bf6
Prevent calls to glXGetSyncValuesOML() and glXWaitForMscOML() from overwriting the (ust,msc) values of the last successfull swapbuffers call (PresentPixmapCompleteNotify event), as glXWaitForSbcOML() relies on those values corresponding to the most recent completed swap, not to whatever was last returned from the server. Problematic call sequence without this patch would have been, e.g., glXSwapBuffers() ... wait ... swap completes -> PresentPixmapComplete event -> (ust,msc) updated to reflect swap completion time and count. ... wait for at least 1 video refresh cycle/vblank increment. glXGetSyncValuesOML() -> PresentNotifyMsc event overwrites (ust,msc) of swap completion with (ust,msc) of most recent vblank glXWaitForSbcOML() -> Returns sbc of last completed swap but (ust,msc) of last completed vblank, not of last completed swap. -> Client is confused. Do this by tracking a separate set of (ust, msc) for the dri3_wait_for_msc() call than for the dri3_wait_for_sbc() call. This makes the glXWaitForSbcOML() call robust again and restores consistent behaviour with the DRI2 implementation. Fixes applications originally written and tested against DRI2 which also rely on this not regressing under DRI3/Present, e.g., Neuro-Science software like Psychtoolbox-3. This patch fixes the problem. v2: Rename vblank_msc/ust to notify_msc/ust as suggested by Axel Davy for better clarity. Cc: "10.3 10.4" <mesa-stable@lists.freedesktop.org> Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com> Reviewed-by: Axel Davy <axel.davy@ens.fr>
File: docs/README.WIN32 Last updated: 21 June 2013 Quick Start ----- ----- Windows drivers are build with SCons. Makefiles or Visual Studio projects are no longer shipped or supported. Run scons osmesa mesagdi to build classic mesa Windows GDI drivers; or scons libgl-gdi to build gallium based GDI driver. This will work both with MSVS or Mingw. Windows Drivers ------- ------- At this time, only the gallium GDI driver is known to work. Source code also exists in the tree for other drivers in src/mesa/drivers/windows, but the status of this code is unknown. Recipe ------ Building on windows requires several open-source packages. These are steps that work as of this writing. - install python 2.7 - install scons (latest) - install mingw, flex, and bison - install pywin32 from here: http://www.lfd.uci.edu/~gohlke/pythonlibs get pywin32-218.4.win-amd64-py2.7.exe - install git - download mesa from git see http://www.mesa3d.org/repository.html - run scons General ------- After building, you can copy the above DLL files to a place in your PATH such as $SystemRoot/SYSTEM32. If you don't like putting things in a system directory, place them in the same directory as the executable(s). Be careful about accidentially overwriting files of the same name in the SYSTEM32 directory. The DLL files are built so that the external entry points use the stdcall calling convention. Static LIB files are not built. The LIB files that are built with are the linker import files associated with the DLL files. The si-glu sources are used to build the GLU libs. This was done mainly to get the better tessellator code. If you have a Windows-related build problem or question, please post to the mesa-dev or mesa-users list.