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From: | lhf+ft |
Subject: | [ft-devel] loss of precision in FT_Outline_Decompose |
Date: | Tue, 16 Jul 2013 09:36:55 -0300 |
User-agent: | Mutt/1.5.21 (2010-09-15) |
At two places in FT_Outline_Decompose there is a division by 2 that loses one bit of precision. A client walking manually through the contours of a glyph and mapping the control points to floats by dividing by 64 and then doing any required midpoint calculation for conics will get different results than one calling FT_Outline_Decompose. I was doing some tests generating outlines of fonts and come upon this because the .eps I generated were slightly different but gave apparently the same image. Is this loss of precision a problem or will it never be seen in an image?
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