1Off-screen Rendering 2==================== 3 4Mesa's off-screen interface is used for rendering into user-allocated 5memory without any sort of window system or operating system 6dependencies. That is, the GL_FRONT colorbuffer is actually a buffer in 7main memory, rather than a window on your display. 8 9The OSMesa API provides three basic functions for making off-screen 10renderings: OSMesaCreateContext(), OSMesaMakeCurrent(), and 11OSMesaDestroyContext(). See the Mesa/include/GL/osmesa.h header for more 12information about the API functions. 13 14The OSMesa interface may be used with the gallium software renderers: 15 16#. llvmpipe - this is the high-performance Gallium LLVM driver 17#. softpipe - this is the reference Gallium software driver 18 19There are several examples of OSMesa in the mesa/demos repository. 20 21Building OSMesa 22--------------- 23 24Configure and build Mesa with something like: 25 26.. code-block:: console 27 28 meson builddir -Dosmesa=true -Dgallium-drivers=swrast -Ddri-drivers=[] -Dvulkan-drivers=[] -Dprefix=$PWD/builddir/install 29 ninja -C builddir install 30 31Make sure you have LLVM installed first if you want to use the llvmpipe 32driver. 33 34When the build is complete you should find: 35 36:: 37 38 $PWD/builddir/install/lib/libOSMesa.so 39 40Set your LD_LIBRARY_PATH to point to $PWD/builddir/install to use the 41libraries 42 43When you link your application, link with -lOSMesa 44