Timothy Arceri
11fc7ad62e
Even if re-linking fails rendering shouldn't fail as the previous
succesfully linked program will still be available. It also shouldn't
be possible to have an unlinked program as part of the current rendering
state.
This fixes a subtest in:
ES31-CTS.sepshaderobjs.StateInteraction
This change should improve performance on CPU limited benchmarks as noted
in commit d6c6b186cf.
>From Section 7.3 (Program Objects) of the OpenGL 4.5 spec:
"If a program object that is active for any shader stage is re-linked
unsuccessfully, the link status will be set to FALSE, but any existing
executables and associated state will remain part of the current rendering
state until a subsequent call to UseProgram, UseProgramStages, or
BindProgramPipeline removes them from use. If such a program is attached to
any program pipeline object, the existing executables and associated state
will remain part of the program pipeline object until a subsequent call to
UseProgramStages removes them from use. An unsuccessfully linked program may
not be made part of the current rendering state by UseProgram or added to
program pipeline objects by UseProgramStages until it is successfully
re-linked."
"void UseProgram(uint program);
...
An INVALID_OPERATION error is generated if program has not been linked, or
was last linked unsuccessfully. The current rendering state is not modified."
V2: apply the rule to both core and compat.
Cc: Tapani Pälli <tapani.palli@intel.com>
Cc: Brian Paul <brianp@vmware.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.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 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.