#!/usr/bin/env python

import gc
import math
import random

import cairo

print 'gc.isenabled() = ', gc.isenabled()
gc.set_debug(gc.DEBUG_LEAK)

surface = cairo.PDFSurface("testsurfaceA.pdf", 1000, 1400)
cr = cairo.Context(surface)

while 1:
  x     = random.uniform(0, 1000)
  y     = random.uniform(0, 1400)
  angle = random.uniform(0, math.pi * 2)
  n     = random.uniform(0, 1000)

  try:
    cr.set_source_rgb(0,0,0)
    cr.set_font_size(2.0)
    m = cr.get_font_matrix()  # new Matrix object
    m.rotate(angle)
    cr.set_font_matrix(m)
    cr.move_to(x, y)
    cr.show_text("%0.2f" % n)
  except MemoryError:
    print "Mem error, aborting. Iteration #%d" % i
    break

  gc.collect()

  print 'len(gc.get_objects())', len(gc.get_objects())
  #print 'gc.get_objects()', gc.get_objects()

  # gc.garbage - a list of uncollectable objects
  print 'len(gc.garbage) =', len(gc.garbage)
  print 'gc.garbage:', gc.garbage

"""
Interpreting the output
-----------------------
if 'len(gc.get_objects()) increases on each loop
  there is a possible memory leak (?)
if len(gc.garbage) increases on each loop
  there is a memory leak
"""