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-rw-r--r--src/gui/painting/qstroker.cpp40
1 files changed, 21 insertions, 19 deletions
diff --git a/src/gui/painting/qstroker.cpp b/src/gui/painting/qstroker.cpp
index 448c972..de56490 100644
--- a/src/gui/painting/qstroker.cpp
+++ b/src/gui/painting/qstroker.cpp
@@ -668,26 +668,28 @@ template <class Iterator> bool qt_stroke_side(Iterator *it,
#endif
QLineF line(qt_fixed_to_real(prev.x), qt_fixed_to_real(prev.y),
qt_fixed_to_real(e.x), qt_fixed_to_real(e.y));
- QLineF normal = line.normalVector();
- normal.setLength(offset);
- line.translate(normal.dx(), normal.dy());
-
- // If we are starting a new subpath, move to correct starting point.
- if (first) {
- if (capFirst)
- stroker->joinPoints(prev.x, prev.y, line, stroker->capStyleMode());
- else
- stroker->emitMoveTo(qt_real_to_fixed(line.x1()), qt_real_to_fixed(line.y1()));
- *startTangent = line;
- first = false;
- } else {
- stroker->joinPoints(prev.x, prev.y, line, stroker->joinStyleMode());
- }
+ if (line.p1() != line.p2()) {
+ QLineF normal = line.normalVector();
+ normal.setLength(offset);
+ line.translate(normal.dx(), normal.dy());
+
+ // If we are starting a new subpath, move to correct starting point.
+ if (first) {
+ if (capFirst)
+ stroker->joinPoints(prev.x, prev.y, line, stroker->capStyleMode());
+ else
+ stroker->emitMoveTo(qt_real_to_fixed(line.x1()), qt_real_to_fixed(line.y1()));
+ *startTangent = line;
+ first = false;
+ } else {
+ stroker->joinPoints(prev.x, prev.y, line, stroker->joinStyleMode());
+ }
- // Add the stroke for this line.
- stroker->emitLineTo(qt_real_to_fixed(line.x2()),
- qt_real_to_fixed(line.y2()));
- prev = e;
+ // Add the stroke for this line.
+ stroker->emitLineTo(qt_real_to_fixed(line.x2()),
+ qt_real_to_fixed(line.y2()));
+ prev = e;
+ }
// CurveToElement
} else if (e.isCurveTo()) {