GL_ARB_shader_draw_parameters DONE (i965, nvc0, radeonsi)
GL_ARB_shader_group_vote DONE (nvc0, radeonsi)
GL_ARB_shader_stencil_export DONE (i965/gen9+, radeonsi, softpipe, llvmpipe, swr)
GL_ARB_shader_draw_parameters DONE (i965, nvc0, radeonsi)
GL_ARB_shader_group_vote DONE (nvc0, radeonsi)
GL_ARB_shader_stencil_export DONE (i965/gen9+, radeonsi, softpipe, llvmpipe, swr)