Add new chain pdf_to_png using ImageMagick

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@35623 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/PortalTransforms/transforms/pdf_to_png.py

+# -*- coding: utf-8 -*-
+from Products.PortalTransforms.libtransforms.imagemagick_transform import ImageMagickTransforms
+
+class pdf_to_png(ImageMagickTransforms):
+    __name__  = "pdf_to_png"
+    inputs    = ('application/pdf', )
+    output   = 'image/png'
+    format  = 'png'
+
+def register():
+    return pdf_to_png()