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For this we will need to move PrimitiveID information, delivered in the thread payload in r0.1, to a separate register (we use GS_OPCODE_SET_PRIMITIVE_ID for this), then map the corresponding varying slot to that register in the setup_payload() method. Notice that we cannot use a virtual register as the destination for the PrimitiveID because we need to map all input attributes to hardware registers in setup_payload(), which happens before virtual registers are mapped to hardware registers. We could work around that issue if we were able to compute the first non-payload register in emit_prolog() and move the PrimitiveID information to that register, but we can't because at that point we still don't know the final number uniforms that will be included in the payload. So, what we do is to place PrimitiveID information in r1, which is always delivered as part of the payload but its only populated with data relevant for transform feedback when we set GEN6_GS_SVBI_PAYLOAD_ENABLE in the 3DSTATE_GS state packet. When we implement transform feedback, we wil make sure to move the value of r1 to another register before we overwrite it with the PrimitiveID. Acked-by: Kenneth Graunke <kenneth@whitecape.org> Reviewed-by: Jordan Justen <jordan.l.justen@intel.com> |
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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. - 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.