Nicolai Hähnle
6b057f8ecc
Some games developers are unaware that an index buffer in a VBO still needs to be read by the CPU if some varying data comes from a user pointer (unless glDrawRangeElements and friends are used). This is particularly bad when they tell us that the index buffer should live in VRAM. This cache helps, e.g. lifting This War Of Mine (a particularly bad offender) from under 10fps to slightly over 20fps on a Carrizo. Note that there is nothing prohibiting a user from rendering from multiple threads simultaneously with the same index buffer, hence the locking. (The internal buffer map taken for the buffer still leads to a race, but at least the locks are a move in the right direction.) v2: disable the cache on USAGE_TEXTURE_BUFFER as well (Chris Forbes) v3: - use bool instead of GLboolean for MinMaxCacheDirty (Ian Romanick) - replace the sticky USAGE_PERSISTENT_WRITE_MAP bit by a direct AccessFlags check Reviewed-by: Chris Forbes <chrisf@ijw.co.nz> (v2) Reviewed-by: Marek Olšák <marek.olsak@amd.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 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.