diff options
| -rw-r--r-- | src/openvg/qpaintengine_vg.cpp | 30 |
1 files changed, 23 insertions, 7 deletions
diff --git a/src/openvg/qpaintengine_vg.cpp b/src/openvg/qpaintengine_vg.cpp index bff3328..6813d2f 100644 --- a/src/openvg/qpaintengine_vg.cpp +++ b/src/openvg/qpaintengine_vg.cpp @@ -1544,7 +1544,28 @@ void QVGPaintEngine::stroke(const QVectorPath &path, const QPen &pen) static inline bool clipTransformIsSimple(const QTransform& transform) { QTransform::TransformationType type = transform.type(); - return (type == QTransform::TxNone || type == QTransform::TxTranslate); + if (type == QTransform::TxNone || type == QTransform::TxTranslate) + return true; + if (type == QTransform::TxRotate) { + // Check for 0, 90, 180, and 270 degree rotations. + // (0 might happen after 4 rotations of 90 degrees). + qreal m11 = transform.m11(); + qreal m12 = transform.m12(); + qreal m21 = transform.m21(); + qreal m22 = transform.m22(); + if (m11 == 0.0f && m22 == 0.0f) { + if (m12 == 1.0f && m21 == -1.0f) + return true; // 90 degrees. + else if (m12 == -1.0f && m21 == 1.0f) + return true; // 270 degrees. + } else if (m12 == 0.0f && m21 == 0.0f) { + if (m11 == -1.0f && m22 == -1.0f) + return true; // 180 degrees. + else if (m11 == 1.0f && m22 == 1.0f) + return true; // 0 degrees. + } + } + return false; } #if defined(QVG_SCISSOR_CLIP) @@ -2351,12 +2372,7 @@ bool QVGPaintEngine::clearRect(const QRectF &rect, const QColor &color) Q_D(QVGPaintEngine); QVGPainterState *s = state(); if (!s->clipEnabled || s->clipOperation == Qt::NoClip) { - // The transform will either be identity or a simple translation, - // so do a simpler version of "r = d->transform.map(rect).toRect()". - QRect r = QRect(qRound(rect.x() + d->transform.dx()), - qRound(rect.y() + d->transform.dy()), - qRound(rect.width()), - qRound(rect.height())); + QRect r = d->transform.mapRect(rect).toRect(); int height = paintDevice()->height(); if (d->clearColor != color || d->clearOpacity != s->opacity) { VGfloat values[4]; |