bugThe FreeType Project - Bugs: bug #43510, Regression in subpixel...

 
 

bug #43510: Regression in subpixel rendering/sharpness, 2.5.3 looks terrible

Submitted by:  Lauri Kasanen <cand>
Submitted on:  Fri 31 Oct 2014 07:03:55 PM UTC  
 
Severity: 3 - NormalItem Group: Incorrect behaviour
Status: InvalidPrivacy: Public
Assigned to: Werner LEMBERG <wl>Open/Closed: Closed
Planned Release: None

Add a New Comment(Rich Markup)
   

You are not logged in

Please log in, so followups can be emailed to you.

 

Sat 01 Nov 2014 10:48:41 AM UTC, comment #2:

Well, the font height change was necessary for compatibility with the MS rasterizer, IIRC.

Will close the bug now.

Werner LEMBERG <wl>
Project AdministratorIn charge of this item.
Sat 01 Nov 2014 09:16:43 AM UTC, comment #1:

After bisecting it I see there were two regressions. The font height was intentionally changed in 2.4.6 (I really dislike the new look btw), but the color fringing/fuzziness was the fault of the new experimental cleartype subpixel hinting feature. Disabling it only leaves the font height bad.

Anyway, the main issue was my configuration mistake. This bug can be closed now, I can't seem to be able to close it myself?

Lauri Kasanen <cand>
Fri 31 Oct 2014 07:03:55 PM UTC, original submission:

When updating Freetype from 2.4.4 to 2.5.3, the looks of every font regressed pretty badly. This includes Bitstream fonts, MS fonts like Arial, Apple fonts like Aquabase.

Every font is blurrier, and there is visible color fringing. All using the same settings for both freetype versions (rgb, lcdlegacy).

I tried all possible options for hinting, autohinting, rgba, and lcdfilter to fix it, but couldn't find a working combination. Please see the screenshot for an example of this.

I will bisect this on the weekend to find the exact commit.

Lauri Kasanen <cand>

 

(Note: upload size limit is set to 16384 kB, after insertion of the required escape characters.)

Attach File(s):
   
   
Comment:
   

Attached Files
file #32349:  freetype-regression.png added by cand (15KiB - image/png)

 

Depends on the following items: None found

Items that depend on this one: None found

 

Carbon-Copy List
  • -unavailable- added by wl (Posted a comment)
  • -unavailable- added by cand (Submitted the item)
  •  

    Do you think this task is very important?
    If so, you can click here to add your encouragement to it.
    This task has 0 encouragements so far.

    Only logged-in users can vote.

     

    Please enter the title of George Orwell's famous dystopian book (it's a date):

     

     

    Follow 4 latest changes.

    Date Changed By Updated Field Previous Value => Replaced By
    Sat 01 Nov 2014 10:48:41 AM UTCwlStatusNone=>Invalid
      Assigned toNone=>wl
      Open/ClosedOpen=>Closed
    Fri 31 Oct 2014 07:03:55 PM UTCcandAttached File-=>Added freetype-regression.png, #32349

    Back to the top


    Powered by Savane 3.1-cleanup1