diff options
Diffstat (limited to 'src/opengl')
-rw-r--r-- | src/opengl/gl2paintengineex/qgl2pexvertexarray.cpp | 55 | ||||
-rw-r--r-- | src/opengl/gl2paintengineex/qgl2pexvertexarray_p.h | 2 |
2 files changed, 17 insertions, 40 deletions
diff --git a/src/opengl/gl2paintengineex/qgl2pexvertexarray.cpp b/src/opengl/gl2paintengineex/qgl2pexvertexarray.cpp index 1fe3999..e70b75e 100644 --- a/src/opengl/gl2paintengineex/qgl2pexvertexarray.cpp +++ b/src/opengl/gl2paintengineex/qgl2pexvertexarray.cpp @@ -120,8 +120,7 @@ void QGL2PEXVertexArray::addPath(const QVectorPath &path, GLfloat curveInverseSc // qDebug("QVectorPath has element types"); for (int i=1; i<path.elementCount(); ++i) { - const QPainterPath::ElementType elementType = elements[i]; - switch (elementType) { + switch (elements[i]) { case QPainterPath::MoveToElement: if (!outline) addClosingLine(lastMoveTo); @@ -137,11 +136,22 @@ void QGL2PEXVertexArray::addPath(const QVectorPath &path, GLfloat curveInverseSc // qDebug("element[%d] is a LineToElement", i); lineToArray(points[i].x(), points[i].y()); break; - case QPainterPath::CurveToElement: -// qDebug("element[%d] is a CurveToElement", i); - curveToArray(points[i], points[i+1], points[i+2], curveInverseScale); - i+=2; - break; + case QPainterPath::CurveToElement: { + QBezier b = QBezier::fromPoints(*(((const QPointF *) points) + i - 1), + points[i], + points[i+1], + points[i+2]); + QRectF bounds = b.bounds(); + // threshold based on same algorithm as in qtriangulatingstroker.cpp + int threshold = qMin<float>(64, qMax(bounds.width(), bounds.height()) * 3.14f / (curveInverseScale * 8)); + if (threshold < 3) threshold = 3; + qreal one_over_threshold_minus_1 = 1.f / (threshold - 1); + for (int t=0; t<threshold; ++t) { + QPointF pt = b.pointAt(t * one_over_threshold_minus_1); + lineToArray(pt.x(), pt.y()); + } + i += 2; + break; } default: break; } @@ -167,35 +177,4 @@ void QGL2PEXVertexArray::lineToArray(const GLfloat x, const GLfloat y) minY = y; } -void QGL2PEXVertexArray::curveToArray(const QGLPoint &cp1, const QGLPoint &cp2, const QGLPoint &ep, GLfloat inverseScale) -{ - qreal inverseScaleHalf = inverseScale / 2; - - QBezier beziers[32]; - beziers[0] = QBezier::fromPoints(vertexArray.last(), cp1, cp2, ep); - QBezier *b = beziers; - while (b >= beziers) { - // check if we can pop the top bezier curve from the stack - qreal l = qAbs(b->x4 - b->x1) + qAbs(b->y4 - b->y1); - qreal d; - if (l > inverseScale) { - d = qAbs( (b->x4 - b->x1)*(b->y1 - b->y2) - (b->y4 - b->y1)*(b->x1 - b->x2) ) - + qAbs( (b->x4 - b->x1)*(b->y1 - b->y3) - (b->y4 - b->y1)*(b->x1 - b->x3) ); - d /= l; - } else { - d = qAbs(b->x1 - b->x2) + qAbs(b->y1 - b->y2) + - qAbs(b->x1 - b->x3) + qAbs(b->y1 - b->y3); - } - if (d < inverseScaleHalf || b == beziers + 31) { - // good enough, we pop it off and add the endpoint - lineToArray(b->x4, b->y4); - --b; - } else { - // split, second half of the polygon goes lower into the stack - b->split(b+1, b); - ++b; - } - } -} - QT_END_NAMESPACE diff --git a/src/opengl/gl2paintengineex/qgl2pexvertexarray_p.h b/src/opengl/gl2paintengineex/qgl2pexvertexarray_p.h index 719904f..c53ef11 100644 --- a/src/opengl/gl2paintengineex/qgl2pexvertexarray_p.h +++ b/src/opengl/gl2paintengineex/qgl2pexvertexarray_p.h @@ -123,8 +123,6 @@ private: GLfloat minY; bool boundingRectDirty; - inline void curveToArray(const QGLPoint &cp1, const QGLPoint &cp2, const QGLPoint &ep, GLfloat inverseScale); - void addClosingLine(int index); void addCentroid(const QVectorPath &path, int subPathIndex); }; |