Paul Berry
626495d269
Both 3DSTATE_VS and 3DSTATE_GS have a dispatch_grf_start_reg control, which determines the register where the hardware delivers data sourced from the URB (push constants followed by per-vertex input data). For vertex shaders, we always set dispatch_grf_start_reg to 1, since R1 is always the first register available for push constants in vertex shaders. For geometry shaders, we'll need the flexibility to set dispatch_grf_start_reg to different values depending on the behvaiour of the geometry shader; if it accesses gl_PrimitiveIDIn, we'll need to set it to 2 to allow the primitive ID to be delivered to the thread in R1. This patch eliminates the assumption that dispatch_grf_start_reg is always 1. In vec4_visitor, we record the regnum that was passed to vec4_visitor::setup_uniforms() in prog_data for later use. In vec4_generator, we consult this value when converting an abstract UNIFORM register to a concrete hardware register. And in the code that emits 3DSTATE_VS, we set dispatch_grf_start_reg based on the value recorded in prog_data. This will allow us to set dispatch_grf_start_reg to the appropriate value when compiling geometry shaders. Vertex shaders will continue to always use a dispatch_grf_start_reg of 1. v2: Make dispatch_grf_start_reg "unsigned" rather than "GLuint". Reviewed-by: Ian Romanick <ian.d.romanick@intel.com> Reviewed-by: Kenneth Graunke <kenneth@whitecape.org> Reviewed-by: Matt Turner <mattst88@gmail.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.