+if with_osmesa != 'none'
+ if with_osmesa == 'classic' and not with_dri_swrast
+ error('OSMesa classic requires dri (classic) swrast.')
+ endif
+ if with_osmesa == 'gallium' and not with_gallium_softpipe
+ error('OSMesa gallium requires gallium softpipe or llvmpipe.')
+ endif
+ osmesa_lib_name = 'OSMesa'
+ osmesa_bits = get_option('osmesa-bits')
+ if osmesa_bits != '8'
+ if with_dri or with_glx != 'disabled'
+ error('OSMesa bits must be 8 if building glx or dir based drivers')
+ endif
+ osmesa_lib_name = osmesa_lib_name + osmesa_bits
+ pre_args += [
+ '-DCHAN_BITS=@0@'.format(osmesa_bits), '-DDEFAULT_SOFTWARE_DEPTH_BITS=31'
+ ]
+ endif
+endif