[cairo] SVG to EMF quality

[Adrian Johnson]

Jan Struyf wrote:
> Dear Shixin Zeng,
> 
>> I've produced some pictures with matplotlib for my paper, which 
>> prefers enhanced MetaFile (EMF). However, current maplotlib 
>> doesn't support EMF output, but svg. So I tried to convert svg 
>> to emf via cairo, as mentioned in this 
>> thread:http://lists.cairographics.org/archives/cairo/2009-January/016215.html
>>
>> But the problem is that the quality of the output emf file is 
>> pretty low. Is this caused by my badly programming or the 
>> limitation of this method itself? Thanks
> 
> I think the Cairo Win32 backend converts most operations to 
> bitmaps, which causes the poor quality EMF files.

The example code is using the win32 printing backend which uses GDI 
vector operations as much as possible.