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Note that we really want to _never_ reach the bottom of the function, which resorts to AoS fetch. Half floats can be handled just like other formats which fit into 32bit vectors (so, only 1x16 and 2x16 formats, albeit with more channels things are not THAT bad), with minimal plumbing. I've seen code size go down nearly by a factor of 3 for a complete texture sampling function (including bilinear filtering) using R16F. (What we should do for everything not special cased is to do AoS gather, shuffle/shift things into SoA vectors, and then do the conversion there. Otherwise it's particularly bad with 1 or 2 channel formats - that r16f format with either 4 or 8-wide vectors was still doing one element at a time, essentially doing exactly the same work as for rgba16f. Also replacing the channels with SWIZZLE0/1 (particularly the latter) adds even more work, as it has to be done per aos vector, and not just straightforward at the end with the SoA vector.) 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.