040894391a
Unigine Heaven (at least) has a bug where it incorrectly uses the GL_ARB_blend_func_extended extension. Dual source blending allows two color outputs per render target; individual shader outputs can be assigned to be either the first or second blending input by setting the 'index' via one of two methods: - An API call: glBindFragDataLocationIndexed() - The GLSL 'layout' qualifier provided by GL_ARB_explicit_attrib_location Both of these only work on user defined fragment shader outputs; it's an error to use either on built-in outputs like gl_FragData. Unigine uses gl_FragData and gl_FragColor exclusively, and doesn't even attempt to use either method to set index == 1. However, it does set the blending function to SRC1 enums, which requires a fragment shader output with index == 1 or else rendering is undefined. In other words, enabling ARB_blend_func_extended causes Unigine to render incorrectly, resulting in an apparent regression, even though our driver code (as far as I can tell) is perfectly fine. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=50291 Signed-off-by: Kenneth Graunke <kenneth@whitecape.org> Reviewed-by: Chad Versace <chad.versace@linux.intel.com> Reviewed-by: Eric Anholt <eric@anholt.net> |
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docs/README.WIN32
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.