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It turns out that noone actually cares if the address computations overflow, be it the stride mul or the offset adds. Wrap around seems to be explicitly permitted even by some other API (which is a _very_ surprising result, as these overflow computations were added just for that and made some tests pass at that time - I suspect some later fixes fixed the actual root cause...). So the requirements in that other api were actually sane there all along after all... Still need to make sure the computed buffer size needed is valid, of course. This ditches the shiny new widening mul from these codepaths, ah well... And now that I really understand this, change the fishy min limiting indices to what it really should have done. Which is simply to prevent fetching more values than valid for the last loop iteration. (This makes the code path in the loop minimally more complex for the non-indexed case as we have to skip the optimization combining two adds. I think it should be safe to skip this actually there, but I don't care much about this especially since skipping that optimization actually makes the code easier to read elsewhere.) 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 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.