Kenneth Graunke
0235757422
This fixes Piglit's ARB_transform_feedback2/change-objects-while-paused GLES 3.0 test. When resuming the transform feedback object, we need to reset the SVBI counters so we continue writing at the correct point in the buffer. Instead of SO_WRITE_OFFSET counters (with a DWord offset), we have the Streamed Vertex Buffer Index (SVBI) counters, which contain a count of vertices emitted. Unfortunately, there's no straightforward way to store the current SVBI counter values to a buffer. They're not available in a register. You can use a bit in the 3DSTATE_SVB_INDEX packet to copy them to another internal counter which 3DPRIMITIVE can use...but there's no good way to extract that either. So, once again, we use SO_NUM_PRIMS_WRITTEN to calculate the vertex numbers. Thankfully, we can reuse most of the existing Gen7+ code. Signed-off-by: Kenneth Graunke <kenneth@whitecape.org> Reviewed-by: Iago Toral Quiroga <itoral@igalia.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 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 https://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.