Paul Berry
7d2ff0bf0b
This patch enables rasterizer discard functionality (a part of transform feedback) in Gen6, by generating an alternate GS program when rasterizer discard is active. Instead of forwarding vertices down the pipeline, the alternate GS program uses a URB Write message to deallocate the URB entry that was allocated by FF sync and terminate the thread. Note: parts of the Sandy Bridge PRM seem to imply that we could do this more efficiently, by clearing the GEN6_GS_RENDERING_ENABLE bit, and not allocating a URB entry at all. However, it's not clear how we are supposed to terminate the thread if we do that. Volume 2 part 1, section 4.5.4, says "GS threads must terminate by sending a URB_WRITE message with the EOT and Complete bits set.", and my experiments so far confirm that. Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
File: docs/README.WIN32 Last updated: 23 April 2011 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. 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.