[Mesa3d-users] what's the difference between glReadPixels and OSMesaGetDepthBuffer ?

[Wei F. <wei...@gm...>]

hi, all

      using osmesa to do off screen render, i noticed that glReadPixels and
OSMesaGetDepthBuffer can both get the depth buffer. so what's the difference
between those two functions. is OSMesaGetDepthBuffer faster?

      and another question: how to convert the data getting from
OSMesaGetDepthBuffer to float? according to osmesa.h, it's 16bit float. how
to convert it to 32bit float?

      thanks in advance.