Roland Scheidegger
f3bbf65929
d3d10 requires per-pixel lod calculations for explicit lod, lod bias and explicit derivatives, and we should probably do it for OpenGL too - at least if they are used from vertex or geometry shaders (so doesn't apply to lod bias) this doesn't just affect neighboring pixels. Some code was already there to handle this so fix it up and enable it. There will no doubt be a performance hit unfortunately, we could do better if we'd knew we had a real vector shift instruction (with variable shift count) but this requires AVX2 on x86 (or a AMD Bulldozer family cpu). Don't do anything for lod bias and explicit derivatives yet, though no special magic should be needed for them neither. Likewise, the size query is still broken just the same. v2: Use information if lod is a (broadcast) scalar or not. The idea would be to base this on the actual value, for now just pretend it's a scalar in fs and not a scalar otherwise (so, per-pixel lod is only used in gs/vs but same code is generated for fs as before). 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 osmesa mesagdi to build classic mesa Windows GDI drivers; or 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. 1) install python 2.7 2) install scons (latest) 3) install mingw, flex, and bison 4) install libxml2 from here: http://www.lfd.uci.edu/~gohlke/pythonlibs get libxml2-python-2.9.1.win-amd64-py2.7.exe 5) install pywin32 from here: http://www.lfd.uci.edu/~gohlke/pythonlibs get pywin32-218.4.win-amd64-py2.7.exe 6) install git 7) download mesa from git see http://www.mesa3d.org/repository.html 8) 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.