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Surprising this bug survived so long, we were missing a clamp (in the linear filtering version). (Valgrind complained a lot about invalid reads with piglit texwrap, I've also seen spurios failures in this test which might have happened due to this. Valgrind probably didn't complain before the alignment reduction in llvmpipe to 4x4 since the test is using tiny textures so the reads were still always well within allocated area.) While here, also do an effective clamp (after half subtraction) of [0,length-0.5] instead of [0, length-1] which saves an instruction (the filtering weight could be different due to this, but only if both texels point to the same max texel so it doesn't matter). (Both changes are borrowed from PIPE_TEX_CLAMP_TO_EDGE case.) Note: This is a candidate for the stable branches. Reviewed-by: Jose Fonseca <jfonseca@vmware.com>
File: docs/README.WIN32 Last updated: 23 April 2011 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. 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.