Kenneth Graunke
066fb237e6
ARB_transform_feedback3 allows applications to insert blank space between interleaved varyings by adding fake 1, 2, 3, or 4-component varyings named gl_SkipComponents[1234]. Mesa's core data structures don't explicitly track these, instead simply tracking the buffer offset for each real varying. If there is padding due to gl_SkipComponents, these will not be contiguous. Our hardware takes the specification quite literally. Instead of specifying offsets for each varying, it assumes they're all contiguous and requires you to program fake varyings for each "hole". This patch adds support for emitting SO_DECL structures for these holes. Although we've lost the information about exactly how the application specified their padding (i.e. gl_SkipComponents2, gl_SkipComponents2 vs. a single gl_SkipComponents4), it shouldn't matter. We just need to emit the right amount of space. This patch emits the minimal number of hole SO_DECL structures. Signed-off-by: Kenneth Graunke <kenneth@whitecape.org> Reviewed-by: Ian Romanick <ian.d.romanick@intel.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.