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This pname is tricky. The spec states that an internal format should be returned, that is compatible with the passed internal format, and has at least the same precision. There is no clear API to resolve this. The closest we have (and what other drivers (i.e, NVidia proprietary) do, is to return the same internal format given as parameter. But we validate first that the passed internal format is supported by i965. To check for support, we have the TextureFormatSupported map'. But this map expects a 'mesa_format', which takes a format+typen. So, we must first "come up" with a generic type that is suited for this internal format, then get a mesa_format, and then do the validation. The cleanest solution here is to add a method that does exactly what the spec wants: a driver's preferred internal format from a given internal format. But at this point we lack a clear view of what defines this preference, and also there seems to be no API for it. Reviewed-by: Dave Airlie <airlied@redhat.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.