[Bug 891457] uneven emulated Bold/Slant for subsetted large fonts

[bugzilla at redhat.com]

Product: Fedora
https://bugzilla.redhat.com/show_bug.cgi?id=891457

Hin-Tak Leung <htl10 at users.sourceforge.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #683564|0                           |1
        is obsolete|                            |

--- Comment #35 from Hin-Tak Leung <htl10 at users.sourceforge.net> ---
Created attachment 689537
  --> https://bugzilla.redhat.com/attachment.cgi?id=689537&action=edit
back ported fix to 2.4.11

backported full fix to 2.4.11 (obsoleting the last attachment).

Deal with overflows and underflows.

The equivalent were committed to freetype head as

commit 610ee58e07090ead529849b2a454bb6c503b4995
    [base] Fix broken emboldening at small sizes.
commit da11e5e7647b668dee46fd0418ea5ecbc33ae3b2
    [base] Fix integer overflow. 
commit e1a2ac1900f2f16ec48fb4840a6b7965a8373c2b
    [base] Fix integer overflow.

and part of 
commit 869fb8c49ddf292d6daf4826172a308973d3e11f
    [base] Split out MSB function.

Thanks Alexei and Werner (and me for part of
da11e5e7647b668dee46fd0418ea5ecbc33ae3b2) for providing the fixes.

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