Path: blob/21.2-virgl/docs/drivers/openswr/usage.rst
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Usage ===== Requirements ^^^^^^^^^^^^ * An x86 processor with AVX or above * LLVM version 3.9 or later * C++14 capable compiler Building ^^^^^^^^ To build with GNU automake, select building the swr driver at configure time, for example: :: configure --with-gallium-drivers=swrast,swr Using ^^^^^ On Linux, building with autotools will create a drop-in alternative for libGL.so into:: lib/gallium/libGL.so lib/gallium/libswrAVX.so lib/gallium/libswrAVX2.so To use it set the LD_LIBRARY_PATH environment variable accordingly. **IMPORTANT:** Mesa will default to using llvmpipe or softpipe as the default software renderer. To select the OpenSWR driver, set the GALLIUM_DRIVER environment variable appropriately: :: GALLIUM_DRIVER=swr To verify OpenSWR is being used, check to see if a message like the following is printed when the application is started: :: SWR detected AVX2