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Instead of handling all of the complexity at the end, we choose to decorate types a bit more cleverly. When we have a row-major matrix type, we give it the stride of a single vector and give it's array element type (which represents a column) the actual matrix stride. Previously, we were using stop_at_matrix and handling everything from matrix on down as special cases but now we walk the access chain all the way to the end and then load. Even though this looks like it may lead to a significant functional change, it doesn't. The reason why we needed to do stop_at_matrix before was to handle row-major properly since the offsets and strides would be all out-of-order. Now that row major matrix types have the small stride on the matrix and the large stride on the vector, offsetting to a single column of a row-major matrix works fine. The load/store code simply picks up on the fact that the stride isn't the type size and does multiple loads. The generated code from these methods should be the same. Reviewed-by: Connor Abbott <cwabbott0@gmail.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 https://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.