Roland Scheidegger
6f2cf5f3d0
Multiple scenes per context are meant to be used so a new scene can be built while another one is processed in rasterization. However, quite surprisingly, this does not actually work (and according to git log, possibly never did, though maybe it did at some point further back (5 years+) but was buggy) because we always wait immediately on the rasterizer to finish the scene when contexts (and hence setup/scene) is flushed. This means when we try to get an empty scene later, any old one is already empty again. Thus using multiple scenes is just a waste of memory (not too bad, since the additional scenes are guaranteed to be empty, which means their size ought to be one data block (64kB) plus the size of some structs), without actually really doing anything. (There is also quite some code for the whole concept of multiple scenes which doesn't really do much in practice, but keep it hoping the wait-on-scene-flush can be fixed some day.) Reviewed-by: Jose Fonseca <jfonseca@vmware.com>
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.