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Until now were validating in/out blocks by listing the inputs in the consumer stage and then, for each output of the producer, we checked that it was a match if it was consumed. This method does not catch the case where the consumer has an input that is not present as an output in the producer stage, because it only generates link errors for outputs present in the producer stage that don't match the inputs in the consumer stage. The current method does catch the case were an output from the producer stage is not consumed, which is irrelevant and is ignored. By reversing the way we do this, we can detect this situation, so this patch lists the outputs of the producer stage and then validates inputs of the consumer stage against them. If we see an input in the consumer for which there is no associated output in the producer, we produce a link error. The only exception to this is the special built-in input block gl_in[], since this is implicitly generated for geometry and tessellation stages, but we don't generate it if the producer stage does not write to any of the pre-defined outputs (for example, if the vertex shader does not write to gl_Position, etc). Since writing to these is not mandatory, do not produce a link error in that case. There is a CTS tessellation test (GL45-CTS.tessellation_shader.program_object_properties) that has an empty vertex shader (so it does not produce gl_in[]) and would fail to link if we don't do this. This fixes the following dEQP test: dEQP-GLES31.functional.shaders.linkage.io_block.missing_output_block Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=98245 Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com> |
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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.