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-rw-r--r--ksvg/impl/SVGPathSegArcImpl.cpp493
1 files changed, 493 insertions, 0 deletions
diff --git a/ksvg/impl/SVGPathSegArcImpl.cpp b/ksvg/impl/SVGPathSegArcImpl.cpp
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+++ b/ksvg/impl/SVGPathSegArcImpl.cpp
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+/*
+ Copyright (C) 2001-2003 KSVG Team
+ This file is part of the KDE project
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public
+ License as published by the Free Software Foundation; either
+ version 2 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public License
+ along with this library; see the file COPYING.LIB. If not, write to
+ the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA.
+*/
+
+#include <math.h>
+
+#include <kdebug.h>
+
+#include "SVGPathSegArcImpl.h"
+#include "SVGAngleImpl.h"
+
+using namespace KSVG;
+
+#include "SVGPathSegArcImpl.lut.h"
+#include "ksvg_scriptinterpreter.h"
+#include "ksvg_bridge.h"
+
+static void getArcSlopes(bool relative, double curx, double cury, double angle, double x, double y, double r1, double r2, bool largeArcFlag, bool sweepFlag, double *pStartSlope, double *pEndSlope)
+{
+ double sin_th, cos_th;
+ double a00, a01, a10, a11;
+ double x0, y0, x1, y1, xc, yc;
+ double d, sfactor, sfactor_sq;
+ double th0, th1, th_arc;
+ int i, n_segs;
+
+ sin_th = sin(angle * (M_PI / 180.0));
+ cos_th = cos(angle * (M_PI / 180.0));
+
+ double dx;
+
+ if(!relative)
+ dx = (curx - x) / 2.0;
+ else
+ dx = -x / 2.0;
+
+ double dy;
+
+ if(!relative)
+ dy = (cury - y) / 2.0;
+ else
+ dy = -y / 2.0;
+
+ double _x1 = cos_th * dx + sin_th * dy;
+ double _y1 = -sin_th * dx + cos_th * dy;
+ double Pr1 = r1 * r1;
+ double Pr2 = r2 * r2;
+ double Px = _x1 * _x1;
+ double Py = _y1 * _y1;
+
+ // Spec : check if radii are large enough
+ double check = Px / Pr1 + Py / Pr2;
+ if(check > 1)
+ {
+ r1 = r1 * sqrt(check);
+ r2 = r2 * sqrt(check);
+ }
+
+ a00 = cos_th / r1;
+ a01 = sin_th / r1;
+ a10 = -sin_th / r2;
+ a11 = cos_th / r2;
+
+ x0 = a00 * curx + a01 * cury;
+ y0 = a10 * curx + a11 * cury;
+
+ if(!relative)
+ x1 = a00 * x + a01 * y;
+ else
+ x1 = a00 * (curx + x) + a01 * (cury + y);
+
+ if(!relative)
+ y1 = a10 * x + a11 * y;
+ else
+ y1 = a10 * (curx + x) + a11 * (cury + y);
+
+ /* (x0, y0) is current point in transformed coordinate space.
+ (x1, y1) is new point in transformed coordinate space.
+
+ The arc fits a unit-radius circle in this space.
+ */
+
+ d = (x1 - x0) * (x1 - x0) + (y1 - y0) * (y1 - y0);
+
+ sfactor_sq = 1.0 / d - 0.25;
+
+ if(sfactor_sq < 0)
+ sfactor_sq = 0;
+
+ sfactor = sqrt(sfactor_sq);
+
+ if(sweepFlag == largeArcFlag)
+ sfactor = -sfactor;
+
+ xc = 0.5 * (x0 + x1) - sfactor * (y1 - y0);
+ yc = 0.5 * (y0 + y1) + sfactor * (x1 - x0);
+
+ /* (xc, yc) is center of the circle. */
+ th0 = atan2(y0 - yc, x0 - xc);
+ th1 = atan2(y1 - yc, x1 - xc);
+
+ th_arc = th1 - th0;
+ if(th_arc < 0 && sweepFlag)
+ th_arc += 2 * M_PI;
+ else if(th_arc > 0 && !sweepFlag)
+ th_arc -= 2 * M_PI;
+
+ n_segs = (int) (int) ceil(fabs(th_arc / (M_PI * 0.5 + 0.001)));
+
+ for(int step = 0; step < 2; step++)
+ {
+ i = step == 0 ? 0 : n_segs - 1;
+
+ double sin_th, cos_th;
+ double a00, a01, a10, a11;
+ double x1, y1, x2, y2, x3, y3;
+ double t;
+ double th_half;
+
+ double _th0 = th0 + i * th_arc / n_segs;
+ double _th1 = th0 + (i + 1) * th_arc / n_segs;
+
+ sin_th = sin(angle * (M_PI / 180.0));
+ cos_th = cos(angle * (M_PI / 180.0));
+
+ /* inverse transform compared with rsvg_path_arc */
+ a00 = cos_th * r1;
+ a01 = -sin_th * r2;
+ a10 = sin_th * r1;
+ a11 = cos_th * r2;
+
+ th_half = 0.5 * (_th1 - _th0);
+ t = (8.0 / 3.0) * sin(th_half * 0.5) * sin(th_half * 0.5) / sin(th_half);
+ x1 = xc + cos(_th0) - t * sin(_th0);
+ y1 = yc + sin(_th0) + t * cos(_th0);
+ x3 = xc + cos(_th1);
+ y3 = yc + sin(_th1);
+ x2 = x3 + t * sin(_th1);
+ y2 = y3 - t * cos(_th1);
+
+ double bezX1 = a00 * x1 + a01 * y1;
+ double bezY1 = a10 * x1 + a11 * y1;
+ double bezX2 = a00 * x2 + a01 * y2;
+ double bezY2 = a10 * x2 + a11 * y2;
+ double bezX = a00 * x3 + a01 * y3;
+ double bezY = a10 * x3 + a11 * y3;
+
+ if(step == 0)
+ *pStartSlope = SVGAngleImpl::todeg(atan2(bezY1 - cury, bezX1 - curx));
+ else
+ *pEndSlope = SVGAngleImpl::todeg(atan2(bezY - bezY2, bezX - bezX2));
+ }
+}
+
+SVGPathSegArcAbsImpl::SVGPathSegArcAbsImpl() : SVGPathSegImpl()
+{
+ KSVG_EMPTY_FLAGS
+}
+
+SVGPathSegArcAbsImpl::~SVGPathSegArcAbsImpl()
+{
+}
+
+void SVGPathSegArcAbsImpl::setX(double x)
+{
+ m_x = x;
+}
+
+double SVGPathSegArcAbsImpl::x() const
+{
+ return m_x;
+}
+
+void SVGPathSegArcAbsImpl::setY(double y)
+{
+ m_y = y;
+}
+
+double SVGPathSegArcAbsImpl::y() const
+{
+ return m_y;
+}
+
+void SVGPathSegArcAbsImpl::setR1(double r1)
+{
+ m_r1 = r1;
+}
+
+double SVGPathSegArcAbsImpl::r1() const
+{
+ return m_r1;
+}
+
+void SVGPathSegArcAbsImpl::setR2(double r2)
+{
+ m_r2 = r2;
+}
+
+double SVGPathSegArcAbsImpl::r2() const
+{
+ return m_r2;
+}
+
+void SVGPathSegArcAbsImpl::setAngle(double angle)
+{
+ m_angle = angle;
+}
+
+double SVGPathSegArcAbsImpl::angle() const
+{
+ return m_angle;
+}
+
+void SVGPathSegArcAbsImpl::setLargeArcFlag(bool largeArcFlag)
+{
+ m_largeArcFlag = largeArcFlag;
+}
+
+bool SVGPathSegArcAbsImpl::largeArcFlag() const
+{
+ return m_largeArcFlag;
+}
+
+void SVGPathSegArcAbsImpl::setSweepFlag(bool sweepFlag)
+{
+ m_sweepFlag = sweepFlag;
+}
+
+bool SVGPathSegArcAbsImpl::sweepFlag() const
+{
+ return m_sweepFlag;
+}
+
+void SVGPathSegArcAbsImpl::getDeltasAndSlopes(double curx, double cury, double *pDx, double *pDy, double *pStartSlope, double *pEndSlope) const
+{
+ double dx = x() - curx;
+ double dy = y() - cury;
+ double startSlope;
+ double endSlope;
+ getArcSlopes(false, curx, cury, angle(), x(), y(), r1(), r2(), largeArcFlag(), sweepFlag(), &startSlope, &endSlope);
+ *pDx = dx;
+ *pDy = dy;
+ *pStartSlope = startSlope;
+ *pEndSlope = endSlope;
+}
+
+// Ecma stuff
+
+/*
+@namespace KSVG
+@begin SVGPathSegArcAbsImpl::s_hashTable 11
+ x SVGPathSegArcAbsImpl::X DontDelete
+ y SVGPathSegArcAbsImpl::Y DontDelete
+ r1 SVGPathSegArcAbsImpl::R1 DontDelete
+ r2 SVGPathSegArcAbsImpl::R2 DontDelete
+ angle SVGPathSegArcAbsImpl::Angle DontDelete
+ largeArcFlag SVGPathSegArcAbsImpl::LargeArcFlag DontDelete
+ sweepFlag SVGPathSegArcAbsImpl::SweepFlag DontDelete
+@end
+*/
+
+Value SVGPathSegArcAbsImpl::getValueProperty(ExecState *, int token) const
+{
+ switch(token)
+ {
+ case X:
+ return Number(x());
+ case Y:
+ return Number(y());
+ case R1:
+ return Number(r1());
+ case R2:
+ return Number(r2());
+ case Angle:
+ return Number(angle());
+ case LargeArcFlag:
+ return Boolean(largeArcFlag());
+ case SweepFlag:
+ return Boolean(sweepFlag());
+ default:
+ kdWarning() << "Unhandled token in " << k_funcinfo << " : " << token << endl;
+ return Undefined();
+ }
+}
+
+void SVGPathSegArcAbsImpl::putValueProperty(ExecState *exec, int token, const Value &value, int)
+{
+ switch(token)
+ {
+ case X:
+ m_x = value.toNumber(exec);
+ break;
+ case Y:
+ m_y = value.toNumber(exec);
+ break;
+ case R1:
+ m_r1 = value.toNumber(exec);
+ break;
+ case R2:
+ m_r2 = value.toNumber(exec);
+ break;
+ case Angle:
+ m_angle = value.toNumber(exec);
+ break;
+ case LargeArcFlag:
+ m_largeArcFlag = value.toBoolean(exec);
+ break;
+ case SweepFlag:
+ m_sweepFlag = value.toBoolean(exec);
+ break;
+ default:
+ kdWarning() << "Unhandled token in " << k_funcinfo << " : " << token << endl;
+ }
+}
+
+
+
+SVGPathSegArcRelImpl::SVGPathSegArcRelImpl() : SVGPathSegImpl()
+{
+ KSVG_EMPTY_FLAGS
+}
+
+SVGPathSegArcRelImpl::~SVGPathSegArcRelImpl()
+{
+}
+
+void SVGPathSegArcRelImpl::setX(double x)
+{
+ m_x = x;
+}
+
+double SVGPathSegArcRelImpl::x() const
+{
+ return m_x;
+}
+
+void SVGPathSegArcRelImpl::setY(double y)
+{
+ m_y = y;
+}
+
+double SVGPathSegArcRelImpl::y() const
+{
+ return m_y;
+}
+
+void SVGPathSegArcRelImpl::setR1(double r1)
+{
+ m_r1 = r1;
+}
+
+double SVGPathSegArcRelImpl::r1() const
+{
+ return m_r1;
+}
+
+void SVGPathSegArcRelImpl::setR2(double r2)
+{
+ m_r2 = r2;
+}
+
+double SVGPathSegArcRelImpl::r2() const
+{
+ return m_r2;
+}
+
+void SVGPathSegArcRelImpl::setAngle(double angle)
+{
+ m_angle = angle;
+}
+
+double SVGPathSegArcRelImpl::angle() const
+{
+ return m_angle;
+}
+
+void SVGPathSegArcRelImpl::setLargeArcFlag(bool largeArcFlag)
+{
+ m_largeArcFlag = largeArcFlag;
+}
+
+bool SVGPathSegArcRelImpl::largeArcFlag() const
+{
+ return m_largeArcFlag;
+}
+
+void SVGPathSegArcRelImpl::setSweepFlag(bool sweepFlag)
+{
+ m_sweepFlag = sweepFlag;
+}
+
+bool SVGPathSegArcRelImpl::sweepFlag() const
+{
+ return m_sweepFlag;
+}
+
+void SVGPathSegArcRelImpl::getDeltasAndSlopes(double curx, double cury, double *pDx, double *pDy, double *pStartSlope, double *pEndSlope) const
+{
+ double dx = x();
+ double dy = y();
+ double startSlope;
+ double endSlope;
+ getArcSlopes(true, curx, cury, angle(), x(), y(), r1(), r2(), largeArcFlag(), sweepFlag(), &startSlope, &endSlope);
+ *pDx = dx;
+ *pDy = dy;
+ *pStartSlope = startSlope;
+ *pEndSlope = endSlope;
+}
+
+// Ecma stuff
+
+/*
+@namespace KSVG
+@begin SVGPathSegArcRelImpl::s_hashTable 11
+ x SVGPathSegArcRelImpl::X DontDelete
+ y SVGPathSegArcRelImpl::Y DontDelete
+ r1 SVGPathSegArcRelImpl::R1 DontDelete
+ r2 SVGPathSegArcRelImpl::R2 DontDelete
+ angle SVGPathSegArcRelImpl::Angle DontDelete
+ largeArcFlag SVGPathSegArcRelImpl::LargeArcFlag DontDelete
+ sweepFlag SVGPathSegArcRelImpl::SweepFlag DontDelete
+@end
+*/
+
+Value SVGPathSegArcRelImpl::getValueProperty(ExecState *, int token) const
+{
+ switch(token)
+ {
+ case X:
+ return Number(x());
+ case Y:
+ return Number(y());
+ case R1:
+ return Number(r1());
+ case R2:
+ return Number(r2());
+ case Angle:
+ return Number(angle());
+ case LargeArcFlag:
+ return Boolean(largeArcFlag());
+ case SweepFlag:
+ return Boolean(sweepFlag());
+ default:
+ kdWarning() << "Unhandled token in " << k_funcinfo << " : " << token << endl;
+ return Undefined();
+ }
+}
+
+void SVGPathSegArcRelImpl::putValueProperty(ExecState *exec, int token, const Value &value, int)
+{
+ switch(token)
+ {
+ case X:
+ m_x = value.toNumber(exec);
+ break;
+ case Y:
+ m_y = value.toNumber(exec);
+ break;
+ case R1:
+ m_r1 = value.toNumber(exec);
+ break;
+ case R2:
+ m_r2 = value.toNumber(exec);
+ break;
+ case Angle:
+ m_angle = value.toNumber(exec);
+ break;
+ case LargeArcFlag:
+ m_largeArcFlag = value.toBoolean(exec);
+ break;
+ case SweepFlag:
+ m_sweepFlag = value.toBoolean(exec);
+ break;
+ default:
+ kdWarning() << "Unhandled token in " << k_funcinfo << " : " << token << endl;
+ }
+}
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