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Almost all of the functions between the ARB and the EXT share the same GLX protocol because the functionality is, essentially, identical. However, there are some differences between the extensions: - In the ARB extension, names must come from glGenBuffers. - In the ARB extension, framebuffer objects are not shared (but they are in the EXT). For these reasons, glBindFramebuffer and glBindRenderbuffer have different GLX protocol opcodes than their EXT counterparts. Currently these functions alias each other in the dispatch table. This makes it impossible to be truly spec conformant. This patch enables fixing the conformance issue by splitting glBindFramebuffer / glBindFramebufferEXT and glBindRenderbuffer / glBindRenderbufferEXT into separate dispatch table entries. Patches will be available shortly to: - Fix the conformance issue. - Stop advertising the EXT in OpenGL 3.1 (or core profiles). HOWEVER, this does represent a compatibility break between the loader (libGL or the Xserver GLX module) and the driver. Mesa drivers compiled without this change will request a single dispatch table entry for glBindFramebuffer and glBindFramebufferEXT. Since the updated loader has different entries for each, the request will fail, and the driver will die in a fire. Drivers built with the change should continue to load fine on loaders without the change. In this case, the driver will separately ask for entries for glBindFramebuffer and glBindFramebufferEXT, and the loader will tell it the same location. Since the loader in the server's GLX module is not (yet) updated, this should not be a problem. We also do not advertise the ARB extension from the server, so, again, this should not be a problem for the server. HOWEVER, this means that DRI1 drivers (remember mga_dri.so?) will no longer load with libGL build hereafter. That means this patch will need to be back ported to the 8.0 branch. v2 (idr): Added missing GLX protocol opcodes for the EXT functions and corrected the opcodes for the ARB functions. Updated GLX indirect_api unit test and dispatch sanity unit test. Signed-off-by: Tomasz Lis <tomasz.lis@intel.com> Signed-off-by: Bartosz Zawistowski <bartosz.l.zawistowski@intel.com> Signed-off-by: Ian Romanick <ian.d.romanick@intel.com> Reviewed-by: Ian Romanick <ian.d.romanick@intel.com> [v1] |
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docs/README.WIN32
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.