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#!/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:
fName = 'snippets/%s.py' % snippet
code = open(fName).read()
exec (code, 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)
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