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[truetype] Do not set any ClearType flags in v40 monochrome mode. 

This fixes weird behavior of instructions that resulted in rendering
differences between v35 and v40 in monochrome mode, e.g., in
`timesbi.ttf'.

* src/truetype/ttinterp.c (Ins_GETINFO)
[TT_SUPPORT_SUBPIXEL_HINTING_MINIMAL]: Check
`subpixel_hinting_lean'.
This commit is contained in:
Nikolaus Waxweiler 2017-08-03 06:15:30 +02:00 committed by Werner Lemberg
parent 7e50824288
commit 7f44c2db24
2 changed files with 17 additions and 1 deletions
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12
ChangeLog
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@ -1,3 +1,15 @@
2017-08-03 Nikolaus Waxweiler <madigens@gmail.com>
[truetype] Do not set any ClearType flags in v40 monochrome mode.
This fixes weird behavior of instructions that resulted in rendering
differences between v35 and v40 in monochrome mode, e.g., in
`timesbi.ttf'.
* src/truetype/ttinterp.c (Ins_GETINFO)
[TT_SUPPORT_SUBPIXEL_HINTING_MINIMAL]: Check
`subpixel_hinting_lean'.
2017-08-01 Werner Lemberg <wl@gnu.org>
* src/truetype/ttgxvar.c (TT_Get_MM_Var): Fix thinko.

6
src/truetype/ttinterp.c
View File

@ -7357,7 +7357,11 @@
K |= 1 << 12;
#ifdef TT_SUPPORT_SUBPIXEL_HINTING_MINIMAL
if ( SUBPIXEL_HINTING_MINIMAL )
/* Toggle the following flags only outside of monochrome mode. */
/* Otherwise, instructions may behave weirdly and rendering results */
/* may differ between v35 and v40 mode, e.g., in `Times New Roman */
/* Bold Italic'. */
if ( SUBPIXEL_HINTING_MINIMAL && exc->subpixel_hinting_lean )
{
/********************************/
/* HINTING FOR SUBPIXEL */