Kenneth Graunke
b6f250d7f2
STATE_BASE_ADDRESS stalls the whole pipeline, and the documentation cautions us to emit it as little as possible for better performance. We recently put some hacks in BLORP to try and avoid emitting it if it was already set correctly. However, this wasn't quite minimal: if BLORP is the first operation (i.e. glClear()), then it would emit it, and subsequent draw calls would emit it again. This caused a small drop in performance in GPUTest Triangle when switching from Meta to BLORP. Unlike most packets, STATE_BASE_ADDRESS isn't influenced by GL state: it needs to be emitted once per batch, before most other commands, or whenever we change the program cache BO. It's also valid in both the 3D and compute pipelines, which makes it even more unique. This patch removes it from the atom mechanism and instead directly calls it as part of every draw, compute dispatch, or BLORP operation. We introduce a new flag indicating that STATE_BASE_ADDRESS has already been emitted this batch, and if so, skip doing it again. When we make a new program cache BO, we simply reset the flag, so the next operation will emit it again. When we flush/reset the batch, we reset the flag. This guarantees that we'll emit STATE_BASE_ADDRESS only when we have to. It's also less code than the old atom mechanism. Signed-off-by: Kenneth Graunke <kenneth@whitecape.org> Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
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.