037f68d81e
From Section 4.4.5 (Uniform and Shader Storage Block Layout Qualifiers) of the OpenGL 4.50 spec: "The align qualifier makes the start of each block member have a minimum byte alignment. It does not affect the internal layout within each member, which will still follow the std140 or std430 rules. The specified alignment must be a power of 2, or a compile-time error results. The actual alignment of a member will be the greater of the specified align alignment and the standard (e.g., std140) base alignment for the member's type. The actual offset of a member is computed as follows: If offset was declared, start with that offset, otherwise start with the next available offset. If the resulting offset is not a multiple of the actual alignment, increase it to the first offset that is a multiple of the actual alignment. This results in the actual offset the member will have. When align is applied to an array, it affects only the start of the array, not the array's internal stride. Both an offset and an align qualifier can be specified on a declaration. The align qualifier, when used on a block, has the same effect as qualifying each member with the same align value as declared on the block, and gets the same compile-time results and errors as if this had been done. As described in general earlier, an individual member can specify its own align, which overrides the block-level align, but just for that member. Reviewed-by: Ian Romanick <ian.d.romanick@intel.com> Reviewed-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com> |
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docs/README.WIN32
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.