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Previous to this patch, when using fixed function fragment shading, bit VARYING_BIT_POS of brw_wm_prog_key::proj_attrib_mask was being set differently during precompiles and normal usage. During precompiles it was being set only if the fragment shader reads from window position (which it never does), so it was always being set to 0. During normal usage it was being set if the vertex shader writes to all 4 components of gl_Position (which it usually does), so it was usually being set to 1. As a result, we were almost always doing an extra recompile for the fixed function fragment shader. The recompile was totally unnecessary, though, because brw_wm_prog_key::proj_attrib_mask is only consulted for fs_visitor::emit_general_interpolation(), which isn't used for VARYING_SLOT_POS. This patch avoids the unnecessary recompile by always setting bit VARYING_BIT_POS of brw_wm_prog_key::proj_attrib_mask to 1. Reviewed-by: Kenneth Graunke <kenneth@whitecape.org> |
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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.