From 91015cb41d8f56777f93394f5a60914bc0c0f330 Mon Sep 17 00:00:00 2001 From: Alexei Podtelezhnikov Date: Sat, 21 Oct 2017 22:57:43 -0400 Subject: [PATCH] [smooth] Improve complex rendering at high ppem. At large sizes almost but not exactly horizontal segments can quickly drain the rendering pool. This patch at least avoids filling the pool with trivial cells. Beyond this, we can only increase the pool size. Reported, analyzed, and tested by Colin Fahey. * src/smooth/ftgrays.c (gray_set_cell): Do not record trivial cells. --- ChangeLog | 14 +++++++++++++- src/smooth/ftgrays.c | 4 ++-- 2 files changed, 15 insertions(+), 3 deletions(-) diff --git a/ChangeLog b/ChangeLog index 7340978ce..afe63fc84 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,15 @@ +2017-10-20 Alexei Podtelezhnikov + + [smooth] Improve complex rendering at high ppem. + + At large sizes almost but not exactly horizontal segments can quickly + drain the rendering pool. This patch at least avoids filling the pool + with trivial cells. Beyond this, we can only increase the pool size. + + Reported, analyzed, and tested by Colin Fahey. + + * src/smooth/ftgrays.c (gray_set_cell): Do not record trivial cells. + 2017-10-20 Alexei Podtelezhnikov [base] Improve tracing in FT_Load_Glyph, FT_*_Size. @@ -43,7 +55,7 @@ 2017-10-14 Alexei Podtelezhnikov * builds/windows/ftdebug.c (FT_Message): Print to stderr. - * builds/wince/ftdebug.c (FT_Message): Ditto. + * builds/wince/ftdebug.c (FT_Message): Ditto. 2017-10-14 Behdad Esfahbod diff --git a/src/smooth/ftgrays.c b/src/smooth/ftgrays.c index e84e38d85..fa488ecb9 100644 --- a/src/smooth/ftgrays.c +++ b/src/smooth/ftgrays.c @@ -582,8 +582,8 @@ typedef ptrdiff_t FT_PtrDist; if ( ex < ras.min_ex ) ex = ras.min_ex - 1; - /* record the current one if it is valid */ - if ( !ras.invalid ) + /* record the current one if it is substantial and valid */ + if ( ( ras.area || ras.cover ) && !ras.invalid ) gray_record_cell( RAS_VAR ); ras.area = 0;