[cairo] how to draw sharp curves?

[Salman Jeelani]

hi,
i want to know how to draw sharp curves. i have drawn some curves and export it to png file and seen that its edges are bit stingy not a sharp straight line. And when i enlarge the png file image got more blurred. i really appreciate any suggestion for this issue.
please find attach a sample image file.
Regards,M Salman 


      
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