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emit_urb_writes() contains code to emit an EOT write with no actual data when there are no output varyings. This makes sense for the VS and TES stages, where it's called once at the end of the program. However, in the geometry shader stage, emit_urb_writes() is called once for every EmitVertex(). We explicitly emit a URB write with EOT set at the end of the shader, separately from this path. So we'd better not terminate the thread. This could get us into trouble for shaders which do EmitVertex() with no varyings followed by SSBO/image/atomic writes. It also caused us to emit multiple sends with EOT set, which apparently confuses the register allocator into not using g112-g127 for all but the first one. This caused EU validation failures in OglGSCloth shaders in shader-db. (The actual application was fine, but shader-db thinks there are no outputs because it doesn't understand transform feedback.) Cc: mesa-stable@lists.freedesktop.org Signed-off-by: Kenneth Graunke <kenneth@whitecape.org> Reviewed-by: Iago Toral Quiroga <itoral@igalia.com> |
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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.