Update code to use cairocffi/pycairo compatible API to determine if

mdboom · mdboom · commit b81313a437fc · 2014-01-27T13:31:00.000-05:00
PDF/PS/SVG backends are available.
diff --git a/lib/matplotlib/backends/backend_cairo.py b/lib/matplotlib/backends/backend_cairo.py
@@ -468,17 +468,17 @@ def _save (self, fo, format, **kwargs):
                                                  width_in_points)
 
         if format == 'ps':
-            if not cairo.HAS_PS_SURFACE:
+            if not hasattr(cairo, 'PSSurface'):
                 raise RuntimeError ('cairo has not been compiled with PS '
                                     'support enabled')
             surface = cairo.PSSurface (fo, width_in_points, height_in_points)
         elif format == 'pdf':
-            if not cairo.HAS_PDF_SURFACE:
+            if not hasattr(cairo, 'PDFSurface'):
                 raise RuntimeError ('cairo has not been compiled with PDF '
                                     'support enabled')
             surface = cairo.PDFSurface (fo, width_in_points, height_in_points)
         elif format in ('svg', 'svgz'):
-            if not cairo.HAS_SVG_SURFACE:
+            if not hasattr(cairo, 'SVGSurface'):
                 raise RuntimeError ('cairo has not been compiled with SVG '
                                     'support enabled')
             if format == 'svgz':
