On Tue, 29 Dec 2015 10:17:03 +0100, Enrico Weigelt, metux IT consult wrote: > case CAIRO_FORMAT_ARGB32: > + case CAIRO_FORMAT_RGB30: > cache->buffer.map0 = MAPSURF_32BIT | MT_32BIT_ARGB8888; Isn’t there a MT_32BIT_ARGB2101010 value you should be using for CAIRO_FORMAT_RGB30?