DEMO provide a running version of code in bug report in #34

tests/gh_bug32.py

@@ -0,0 +1,24 @@
+#! /usr/bin/env python
+"""Tests bug report #32 from github"""
+import os
+if not os.environ.get( 'PYOPENGL_PLATFORM' ):
+    os.environ['PYOPENGL_PLATFORM'] = 'osmesa'
+from math import pi, sin, cos
+import OpenGL
+OpenGL.USE_ACCELERATE = False
+from OpenGL.GL import *
+from OpenGL.GL.ARB.fragment_program import glGenProgramsARB
+from OpenGL.GLU import *
+from OpenGL.osmesa import *
+width = height = 300
+
+shared_win = None
+# Current OSMesa does not seem to support RGB, only RGBA,
+# note also the use of the OSMESA_* constants here, they
+# seem to match the GL constants, but can't be too careful.
+# Also see ./osdemo.py for a working sample of offscreen
+# rendering using OSMesa.
+ctx = OSMesaCreateContext(OSMESA_RGBA, shared_win)
+buf = arrays.GLubyteArray.zeros((height, width, 4))
+mesap = arrays.ArrayDatatype.dataPointer(buf)
+assert(OSMesaMakeCurrent(ctx, GLuint(mesap), GL_UNSIGNED_BYTE, width, height))