gui: Pass large types by const-ref

sizeof:

Operator            : 144
QTransform          : 88
QGlyphLayout        : 48
QTextFrame::Iterator: 32
QRectF              : 32
QCss::Value         : 24

(Linux/x86_64)

Change-Id: I4965bf0959683c0bc8909428fca86d66851af92c
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/src/gui/text/qtextengine.cpp b/src/gui/text/qtextengine.cpp
index f5df6fd60b..7708157697 100644
--- a/src/gui/text/qtextengine.cpp
+++ b/src/gui/text/qtextengine.cpp
@@ -843,7 +843,7 @@ enum JustificationClass {
     Adds an inter character justification opportunity after the number or letter
     character and a space justification opportunity after the space character.
 */
-static inline void qt_getDefaultJustificationOpportunities(const ushort *string, int length, QGlyphLayout g, ushort *log_clusters, int spaceAs)
+static inline void qt_getDefaultJustificationOpportunities(const ushort *string, int length, const QGlyphLayout &g, ushort *log_clusters, int spaceAs)
 {
     int str_pos = 0;
     while (str_pos < length) {
@@ -877,7 +877,7 @@ static inline void qt_getDefaultJustificationOpportunities(const ushort *string,
     }
 }
 
-static inline void qt_getJustificationOpportunities(const ushort *string, int length, const QScriptItem &si, QGlyphLayout g, ushort *log_clusters)
+static inline void qt_getJustificationOpportunities(const ushort *string, int length, const QScriptItem &si, const QGlyphLayout &g, ushort *log_clusters)
 {
     Q_ASSERT(length > 0 && g.numGlyphs > 0);
 
@@ -3509,7 +3509,7 @@ QTextItemInt QTextItemInt::midItem(QFontEngine *fontEngine, int firstGlyphIndex,
 }
 
 
-QTransform qt_true_matrix(qreal w, qreal h, QTransform x)
+QTransform qt_true_matrix(qreal w, qreal h, const QTransform &x)
 {
     QRectF rect = x.mapRect(QRectF(0, 0, w, h));
     return x * QTransform::fromTranslate(-rect.x(), -rect.y());