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Cache QTextLayout objects with Qt/Mac

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It seems that the internal Qt5 caching does not work well here,
especially in the case of ancient Hebrew documents.

(cherry picked from commit 5354c64b27)
This commit is contained in:
Jean-Marc Lasgouttes 2017-04-18 14:02:31 +02:00
parent 413de12adf
commit 04350ad288
2 changed files with 6 additions and 2 deletions
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3
src/frontends/qt4/GuiFontMetrics.cpp
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@ -58,7 +58,8 @@ namespace frontend {
int cache_metrics_width_size = 1 << 19;
int cache_metrics_breakat_size = 1 << 19;
// Qt 5.x already has its own caching of QTextLayout objects
#if (QT_VERSION < 0x050000)
// but it does not seem to work well on MacOS X.
#if (QT_VERSION < 0x050000) || defined(Q_OS_MAC)
int cache_metrics_qtextlayout_size = 500;
#else
int cache_metrics_qtextlayout_size = 0;

5
status.22x
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@ -55,7 +55,10 @@ What's new
- fixes to cursor positionning on mouse click for right-to-left text
(bug 10569).
- Fix metricsof full-width insets when paragraph endings are shown (bug #10537).
- Fix metrics of full-width insets when paragraph endings are shown
(bug #10537).
- Fix glacial performance with ancient Hebrew text on macOS.
* INTERNALS