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dcf2feadc3
gather is defined in terms of bilinear filtering, just without the filtering part. However, there's actually some subtle differences required in our implementation, because we use some tricks to simplify coord wrapping for the two coords per direction. For bilinear filtering, we don't care if we end up with an incorrect texel, as long as the filter weight is 0.0 for it. Likewise, the order of the texels doesn't actually matter (as long as they still have the correct filter weight). But for gather, these tricks lead to incorrect results. Fix this for CLAMP_TO_EDGE, and add some comments to the other wrap functions which look broken (the 3 mirror_clamp plus mirror_repeat) (too complex to fix right now, and noone really seems to care...). Reviewed-by: Brian Paul <brianp@vmware.com> Reviewed-by: Jose Fonseca <jfonseca@vmware.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 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.