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The SPIR-V spec doesn’t specify a size requirement for these and the equivalent functions in the GLSL spec have explicit alternatives for doubles. Refract is a little bit more complicated due to the fact that the final argument is always supposed to be a scalar 32- or 16- bit float regardless of the other operands. However in practice it seems there is a bug in glslang that makes it convert the argument to 64-bit if you actually try to pass it a 32-bit value while the other arguments are 64-bit. This adds an optional conversion of the final argument in order to support any type. These have been tested against the automatically generated tests of glsl-4.00/execution/built-in-functions using the ARB_gl_spirv branch which tests it with quite a large range of combinations. The issue with glslang has been filed here: https://github.com/KhronosGroup/glslang/issues/1279 v2: Convert the eta operand of Refract from any size in order to make it eventually cope with 16-bit floats. Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
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.