bugThe FreeType Project - Bugs: bug #20476, linearHoriAdvance is snapped to...

 
 

bug #20476: linearHoriAdvance is snapped to some integer value with monospaced fonts

Submitted by:  None
Submitted on:  Fri 13 Jul 2007 03:05:52 PM UTC  
 
Severity: 3 - NormalItem Group: Incorrect behaviour
Status: NonePrivacy: Public
Assigned to: David Turner <freetype>Open/Closed: Open
Planned Release: None

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Fri 13 Jul 2007 03:05:52 PM UTC, original submission:

In TT font Courier New (windows file cour.ttf) linearHoriAdvance, should be accurate and strictly proportional to the sub-pixel height you set. However, it is snapped to some value.

Font: cour.ttf from WinXP
Hinting: FT_LOAD_NO_HINTING
Then you set:
FT_Set_Char_Size(face, 0, height, 72, 72);
where "heights" are:
7.02, 7.80, 8.58, 9.36, 10.14, 10.92, 11.70, 12.48,
13.26, 14.04, 14.82, 15.60
(in the corresponding 26.6 units of course)

It results in the following picture using linearHoriAdvance:
http://antigrain.com/stuff/12cour.png
With any proportional font there's no such effect and the text width is proportional to the given height.

Anonymous

 

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Attached Files
file #13329:  12cour.png added by None (38kB - image/png)

 

Depends on the following items: None found

Items that depend on this one: None found

 

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  • -unavailable- added by wl (Updated the item)
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    Follow 2 latest changes.

    Date Changed By Updated Field Previous Value => Replaced By
    Fri 13 Jul 2007 09:23:41 PM UTCwlAssigned toNone=>freetype
    Fri 13 Jul 2007 03:05:53 PM UTCNoneAttached File-=>Added 12cour.png, #13329

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