[IMP]register custom fonts once only

bzr revid: tony@wonderland-20101220055040-lti41w3qq5xi3dtp

bin/report/render/rml2pdf/trml2pdf.py

@@ -65,7 +65,7 @@ def _open_image(filename, path=None):
         except IOError:
             pass
     raise IOError("File %s cannot be found in image path" % filename)
-    
+
 class NumberedCanvas(canvas.Canvas):
     def __init__(self, *args, **kwargs):
         canvas.Canvas.__init__(self, *args, **kwargs)
@@ -243,7 +243,8 @@ class _rml_doc(object):
             for font in node.findall('registerFont'):
                 name = font.get('fontName').encode('ascii')
                 fname = font.get('fontFile').encode('ascii')
-                pdfmetrics.registerFont(TTFont(name, fname ))
+                if name not in pdfmetrics._fonts:
+                    pdfmetrics.registerFont(TTFont(name, fname ))
                 addMapping(name, 0, 0, name)    #normal
                 addMapping(name, 0, 1, name)    #italic
                 addMapping(name, 1, 0, name)    #bold
@@ -254,6 +255,8 @@ class _rml_doc(object):
         from reportlab.pdfbase import pdfmetrics
         from reportlab.pdfbase.ttfonts import TTFont
 
+        if fontname not in pdfmetrics._fonts:
+            pdfmetrics.registerFont(TTFont(name, fname ))
         pdfmetrics.registerFont(TTFont(fontname, filename ))
         if (mode == 'all'):
             addMapping(face, 0, 0, fontname)    #normal