diff options
Diffstat (limited to 'WebCore/platform/graphics/qt/PathQt.cpp')
| -rw-r--r-- | WebCore/platform/graphics/qt/PathQt.cpp | 80 |
1 files changed, 72 insertions, 8 deletions
diff --git a/WebCore/platform/graphics/qt/PathQt.cpp b/WebCore/platform/graphics/qt/PathQt.cpp index bd0192c..a8a3ea2 100644 --- a/WebCore/platform/graphics/qt/PathQt.cpp +++ b/WebCore/platform/graphics/qt/PathQt.cpp @@ -1,6 +1,7 @@ /* - * Copyright (C) 2006 Zack Rusin <zack@kde.org> - * 2006 Rob Buis <buis@kde.org> + * Copyright (C) 2006 Zack Rusin <zack@kde.org> + * 2006 Rob Buis <buis@kde.org> + * 2009 Dirk Schulze <krit@webkit.org> * * All rights reserved. * @@ -36,7 +37,7 @@ #include "PlatformString.h" #include "StrokeStyleApplier.h" #include <QPainterPath> -#include <QMatrix> +#include <QTransform> #include <QString> #define _USE_MATH_DEFINES @@ -108,7 +109,7 @@ bool Path::strokeContains(StrokeStyleApplier* applier, const FloatPoint& point) void Path::translate(const FloatSize& size) { - QMatrix matrix; + QTransform matrix; matrix.translate(size.width(), size.height()); *m_path = (*m_path) * matrix; } @@ -161,9 +162,72 @@ void Path::addBezierCurveTo(const FloatPoint& cp1, const FloatPoint& cp2, const void Path::addArcTo(const FloatPoint& p1, const FloatPoint& p2, float radius) { - //FIXME: busted - qWarning("arcTo is busted"); - m_path->arcTo(p1.x(), p1.y(), p2.x(), p2.y(), radius, 90); + FloatPoint p0(m_path->currentPosition()); + + if ((p1.x() == p0.x() && p1.y() == p0.y()) || (p1.x() == p2.x() && p1.y() == p2.y()) || radius == 0.f) { + m_path->lineTo(p1); + return; + } + + FloatPoint p1p0((p0.x() - p1.x()),(p0.y() - p1.y())); + FloatPoint p1p2((p2.x() - p1.x()),(p2.y() - p1.y())); + float p1p0_length = sqrtf(p1p0.x() * p1p0.x() + p1p0.y() * p1p0.y()); + float p1p2_length = sqrtf(p1p2.x() * p1p2.x() + p1p2.y() * p1p2.y()); + + double cos_phi = (p1p0.x() * p1p2.x() + p1p0.y() * p1p2.y()) / (p1p0_length * p1p2_length); + // all points on a line logic + if (cos_phi == -1) { + m_path->lineTo(p1); + return; + } + if (cos_phi == 1) { + // add infinite far away point + unsigned int max_length = 65535; + double factor_max = max_length / p1p0_length; + FloatPoint ep((p0.x() + factor_max * p1p0.x()), (p0.y() + factor_max * p1p0.y())); + m_path->lineTo(ep); + return; + } + + float tangent = radius / tan(acos(cos_phi) / 2); + float factor_p1p0 = tangent / p1p0_length; + FloatPoint t_p1p0((p1.x() + factor_p1p0 * p1p0.x()), (p1.y() + factor_p1p0 * p1p0.y())); + + FloatPoint orth_p1p0(p1p0.y(), -p1p0.x()); + float orth_p1p0_length = sqrt(orth_p1p0.x() * orth_p1p0.x() + orth_p1p0.y() * orth_p1p0.y()); + float factor_ra = radius / orth_p1p0_length; + + // angle between orth_p1p0 and p1p2 to get the right vector orthographic to p1p0 + double cos_alpha = (orth_p1p0.x() * p1p2.x() + orth_p1p0.y() * p1p2.y()) / (orth_p1p0_length * p1p2_length); + if (cos_alpha < 0.f) + orth_p1p0 = FloatPoint(-orth_p1p0.x(), -orth_p1p0.y()); + + FloatPoint p((t_p1p0.x() + factor_ra * orth_p1p0.x()), (t_p1p0.y() + factor_ra * orth_p1p0.y())); + + // calculate angles for addArc + orth_p1p0 = FloatPoint(-orth_p1p0.x(), -orth_p1p0.y()); + float sa = acos(orth_p1p0.x() / orth_p1p0_length); + if (orth_p1p0.y() < 0.f) + sa = 2 * piDouble - sa; + + // anticlockwise logic + bool anticlockwise = false; + + float factor_p1p2 = tangent / p1p2_length; + FloatPoint t_p1p2((p1.x() + factor_p1p2 * p1p2.x()), (p1.y() + factor_p1p2 * p1p2.y())); + FloatPoint orth_p1p2((t_p1p2.x() - p.x()),(t_p1p2.y() - p.y())); + float orth_p1p2_length = sqrtf(orth_p1p2.x() * orth_p1p2.x() + orth_p1p2.y() * orth_p1p2.y()); + float ea = acos(orth_p1p2.x() / orth_p1p2_length); + if (orth_p1p2.y() < 0) + ea = 2 * piDouble - ea; + if ((sa > ea) && ((sa - ea) < piDouble)) + anticlockwise = true; + if ((sa < ea) && ((ea - sa) > piDouble)) + anticlockwise = true; + + m_path->lineTo(t_p1p0); + + addArc(p, radius, sa, ea, anticlockwise); } void Path::closeSubpath() @@ -316,7 +380,7 @@ void Path::apply(void* info, PathApplierFunction function) const void Path::transform(const TransformationMatrix& transform) { if (m_path) { - QMatrix mat = transform; + QTransform mat = transform; QPainterPath temp = mat.map(*m_path); delete m_path; m_path = new QPainterPath(temp); |