#!/usr/bin/env python
"""Python version of cairo-demo/cairo_snippets/cairo_snippets_png.c
"""

from __future__ import division
from math import pi as M_PI  # used by many snippets
import sys

import cairo
if not (cairo.HAS_IMAGE_SURFACE and cairo.HAS_PNG_FUNCTIONS):
  raise SystemExit ('cairo was not compiled with ImageSurface and PNG support')

from snippets import snip_list, snippet_normalize


width, height = 256, 256 # used by snippet_normalize()


def do_snippet (snippet):
  if verbose_mode:
    print 'processing %s' % snippet,

  surface = cairo.ImageSurface (cairo.FORMAT_ARGB32, width, height)
  cr = cairo.Context (surface)

  cr.save()
  try:
    execfile ('snippets/%s.py' % snippet, globals(), locals())
  except:
#    exc_type, exc_value = sys.exc_info()[:2]
#    print >> sys.stderr, exc_type, exc_value
    raise
  else:
    cr.restore()
    surface.write_to_png ('snippets/%s.png' % snippet)

  if verbose_mode:
    print

if __name__ == '__main__':
  verbose_mode = True
  if len(sys.argv) > 1 and sys.argv[1] == '-s':
    verbose_mode = False
    del sys.argv[1]

  if len(sys.argv) > 1: # do specified snippets
    snippet_list = sys.argv[1:]
  else:                 # do all snippets
    snippet_list = snip_list

  for s in snippet_list:
    do_snippet (s)