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-rw-r--r--src/livarot/Path.cpp945
1 files changed, 945 insertions, 0 deletions
diff --git a/src/livarot/Path.cpp b/src/livarot/Path.cpp
new file mode 100644
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--- /dev/null
+++ b/src/livarot/Path.cpp
@@ -0,0 +1,945 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/** @file
+ * TODO: insert short description here
+ *//*
+ * Authors:
+ * see git history
+ * Fred
+ *
+ * Copyright (C) 2018 Authors
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include <glib.h>
+#include "Path.h"
+
+#include <2geom/pathvector.h>
+
+#include "livarot/path-description.h"
+
+/*
+ * manipulation of the path data: path description and polyline
+ * grunt work...
+ * at the end of this file, 2 utilitary functions to get the point and tangent to path associated with a (command no;abcissis)
+ */
+
+
+Path::Path()
+{
+ descr_flags = 0;
+ pending_bezier_cmd = -1;
+ pending_moveto_cmd = -1;
+
+ back = false;
+}
+
+Path::~Path()
+{
+ for (auto & i : descr_cmd) {
+ delete i;
+ }
+}
+
+// debug function do dump the path contents on stdout
+void Path::Affiche()
+{
+ std::cout << "path: " << descr_cmd.size() << " commands." << std::endl;
+ for (auto i : descr_cmd) {
+ i->dump(std::cout);
+ std::cout << std::endl;
+ }
+
+ std::cout << std::endl;
+}
+
+void Path::Reset()
+{
+ for (auto & i : descr_cmd) {
+ delete i;
+ }
+
+ descr_cmd.clear();
+ pending_bezier_cmd = -1;
+ pending_moveto_cmd = -1;
+ descr_flags = 0;
+}
+
+void Path::Copy(Path * who)
+{
+ ResetPoints();
+
+ for (auto & i : descr_cmd) {
+ delete i;
+ }
+
+ descr_cmd.clear();
+
+ for (auto i : who->descr_cmd)
+ {
+ descr_cmd.push_back(i->clone());
+ }
+}
+
+void Path::CloseSubpath()
+{
+ descr_flags &= ~(descr_doing_subpath);
+ pending_moveto_cmd = -1;
+}
+
+int Path::ForcePoint()
+{
+ if (descr_flags & descr_adding_bezier) {
+ EndBezierTo ();
+ }
+
+ if ( (descr_flags & descr_doing_subpath) == 0 ) {
+ return -1;
+ }
+
+ if (descr_cmd.empty()) {
+ return -1;
+ }
+
+ descr_cmd.push_back(new PathDescrForced);
+ return descr_cmd.size() - 1;
+}
+
+
+void Path::InsertForcePoint(int at)
+{
+ if ( at < 0 || at > int(descr_cmd.size()) ) {
+ return;
+ }
+
+ if ( at == int(descr_cmd.size()) ) {
+ ForcePoint();
+ return;
+ }
+
+ descr_cmd.insert(descr_cmd.begin() + at, new PathDescrForced);
+}
+
+int Path::Close()
+{
+ if ( descr_flags & descr_adding_bezier ) {
+ CancelBezier();
+ }
+ if ( descr_flags & descr_doing_subpath ) {
+ CloseSubpath();
+ } else {
+ // Nothing to close.
+ return -1;
+ }
+
+ descr_cmd.push_back(new PathDescrClose);
+
+ descr_flags &= ~(descr_doing_subpath);
+ pending_moveto_cmd = -1;
+
+ return descr_cmd.size() - 1;
+}
+
+int Path::MoveTo(Geom::Point const &iPt)
+{
+ if ( descr_flags & descr_adding_bezier ) {
+ EndBezierTo(iPt);
+ }
+ if ( descr_flags & descr_doing_subpath ) {
+ CloseSubpath();
+ }
+ pending_moveto_cmd = descr_cmd.size();
+
+ descr_cmd.push_back(new PathDescrMoveTo(iPt));
+
+ descr_flags |= descr_doing_subpath;
+ return descr_cmd.size() - 1;
+}
+
+void Path::InsertMoveTo(Geom::Point const &iPt, int at)
+{
+ if ( at < 0 || at > int(descr_cmd.size()) ) {
+ return;
+ }
+
+ if ( at == int(descr_cmd.size()) ) {
+ MoveTo(iPt);
+ return;
+ }
+
+ descr_cmd.insert(descr_cmd.begin() + at, new PathDescrMoveTo(iPt));
+}
+
+int Path::LineTo(Geom::Point const &iPt)
+{
+ if (descr_flags & descr_adding_bezier) {
+ EndBezierTo (iPt);
+ }
+ if (!( descr_flags & descr_doing_subpath )) {
+ return MoveTo (iPt);
+ }
+
+ descr_cmd.push_back(new PathDescrLineTo(iPt));
+ return descr_cmd.size() - 1;
+}
+
+void Path::InsertLineTo(Geom::Point const &iPt, int at)
+{
+ if ( at < 0 || at > int(descr_cmd.size()) ) {
+ return;
+ }
+
+ if ( at == int(descr_cmd.size()) ) {
+ LineTo(iPt);
+ return;
+ }
+
+ descr_cmd.insert(descr_cmd.begin() + at, new PathDescrLineTo(iPt));
+}
+
+int Path::CubicTo(Geom::Point const &iPt, Geom::Point const &iStD, Geom::Point const &iEnD)
+{
+ if (descr_flags & descr_adding_bezier) {
+ EndBezierTo(iPt);
+ }
+ if ( (descr_flags & descr_doing_subpath) == 0) {
+ return MoveTo (iPt);
+ }
+
+ descr_cmd.push_back(new PathDescrCubicTo(iPt, iStD, iEnD));
+ return descr_cmd.size() - 1;
+}
+
+
+void Path::InsertCubicTo(Geom::Point const &iPt, Geom::Point const &iStD, Geom::Point const &iEnD, int at)
+{
+ if ( at < 0 || at > int(descr_cmd.size()) ) {
+ return;
+ }
+
+ if ( at == int(descr_cmd.size()) ) {
+ CubicTo(iPt,iStD,iEnD);
+ return;
+ }
+
+ descr_cmd.insert(descr_cmd.begin() + at, new PathDescrCubicTo(iPt, iStD, iEnD));
+}
+
+int Path::ArcTo(Geom::Point const &iPt, double iRx, double iRy, double angle,
+ bool iLargeArc, bool iClockwise)
+{
+ if (descr_flags & descr_adding_bezier) {
+ EndBezierTo(iPt);
+ }
+ if ( (descr_flags & descr_doing_subpath) == 0 ) {
+ return MoveTo(iPt);
+ }
+
+ descr_cmd.push_back(new PathDescrArcTo(iPt, iRx, iRy, angle, iLargeArc, iClockwise));
+ return descr_cmd.size() - 1;
+}
+
+
+void Path::InsertArcTo(Geom::Point const &iPt, double iRx, double iRy, double angle,
+ bool iLargeArc, bool iClockwise, int at)
+{
+ if ( at < 0 || at > int(descr_cmd.size()) ) {
+ return;
+ }
+
+ if ( at == int(descr_cmd.size()) ) {
+ ArcTo(iPt, iRx, iRy, angle, iLargeArc, iClockwise);
+ return;
+ }
+
+ descr_cmd.insert(descr_cmd.begin() + at, new PathDescrArcTo(iPt, iRx, iRy,
+ angle, iLargeArc, iClockwise));
+}
+
+int Path::TempBezierTo()
+{
+ if (descr_flags & descr_adding_bezier) {
+ CancelBezier();
+ }
+ if ( (descr_flags & descr_doing_subpath) == 0) {
+ // No starting point -> bad.
+ return -1;
+ }
+ pending_bezier_cmd = descr_cmd.size();
+
+ descr_cmd.push_back(new PathDescrBezierTo(Geom::Point(0, 0), 0));
+ descr_flags |= descr_adding_bezier;
+ descr_flags |= descr_delayed_bezier;
+ return descr_cmd.size() - 1;
+}
+
+void Path::CancelBezier()
+{
+ descr_flags &= ~(descr_adding_bezier);
+ descr_flags &= ~(descr_delayed_bezier);
+ if (pending_bezier_cmd < 0) {
+ return;
+ }
+
+ /* FIXME: I think there's a memory leak here */
+ descr_cmd.resize(pending_bezier_cmd);
+ pending_bezier_cmd = -1;
+}
+
+int Path::EndBezierTo()
+{
+ if (descr_flags & descr_delayed_bezier) {
+ CancelBezier ();
+ } else {
+ pending_bezier_cmd = -1;
+ descr_flags &= ~(descr_adding_bezier);
+ descr_flags &= ~(descr_delayed_bezier);
+ }
+ return -1;
+}
+
+int Path::EndBezierTo(Geom::Point const &iPt)
+{
+ if ( (descr_flags & descr_adding_bezier) == 0 ) {
+ return LineTo(iPt);
+ }
+ if ( (descr_flags & descr_doing_subpath) == 0 ) {
+ return MoveTo(iPt);
+ }
+ if ( (descr_flags & descr_delayed_bezier) == 0 ) {
+ return EndBezierTo();
+ }
+ PathDescrBezierTo *nData = dynamic_cast<PathDescrBezierTo *>(descr_cmd[pending_bezier_cmd]);
+ nData->p = iPt;
+ pending_bezier_cmd = -1;
+ descr_flags &= ~(descr_adding_bezier);
+ descr_flags &= ~(descr_delayed_bezier);
+ return -1;
+}
+
+
+int Path::IntermBezierTo(Geom::Point const &iPt)
+{
+ if ( (descr_flags & descr_adding_bezier) == 0 ) {
+ return LineTo (iPt);
+ }
+
+ if ( (descr_flags & descr_doing_subpath) == 0) {
+ return MoveTo (iPt);
+ }
+
+ descr_cmd.push_back(new PathDescrIntermBezierTo(iPt));
+
+ PathDescrBezierTo *nBData = dynamic_cast<PathDescrBezierTo *>(descr_cmd[pending_bezier_cmd]);
+ nBData->nb++;
+ return descr_cmd.size() - 1;
+}
+
+
+void Path::InsertIntermBezierTo(Geom::Point const &iPt, int at)
+{
+ if ( at < 0 || at > int(descr_cmd.size()) ) {
+ return;
+ }
+
+ if ( at == int(descr_cmd.size()) ) {
+ IntermBezierTo(iPt);
+ return;
+ }
+
+ descr_cmd.insert(descr_cmd.begin() + at, new PathDescrIntermBezierTo(iPt));
+}
+
+
+int Path::BezierTo(Geom::Point const &iPt)
+{
+ if ( descr_flags & descr_adding_bezier ) {
+ EndBezierTo(iPt);
+ }
+
+ if ( (descr_flags & descr_doing_subpath) == 0 ) {
+ return MoveTo (iPt);
+ }
+
+ pending_bezier_cmd = descr_cmd.size();
+
+ descr_cmd.push_back(new PathDescrBezierTo(iPt, 0));
+ descr_flags |= descr_adding_bezier;
+ descr_flags &= ~(descr_delayed_bezier);
+ return descr_cmd.size() - 1;
+}
+
+
+void Path::InsertBezierTo(Geom::Point const &iPt, int iNb, int at)
+{
+ if ( at < 0 || at > int(descr_cmd.size()) ) {
+ return;
+ }
+
+ if ( at == int(descr_cmd.size()) ) {
+ BezierTo(iPt);
+ return;
+ }
+
+ descr_cmd.insert(descr_cmd.begin() + at, new PathDescrBezierTo(iPt, iNb));
+}
+
+
+/*
+ * points of the polyline
+ */
+void
+Path::SetBackData (bool nVal)
+{
+ if (! back) {
+ if (nVal) {
+ back = true;
+ ResetPoints();
+ }
+ } else {
+ if (! nVal) {
+ back = false;
+ ResetPoints();
+ }
+ }
+}
+
+
+void Path::ResetPoints()
+{
+ pts.clear();
+}
+
+
+int Path::AddPoint(Geom::Point const &iPt, bool mvto)
+{
+ if (back) {
+ return AddPoint (iPt, -1, 0.0, mvto);
+ }
+
+ if ( !mvto && !pts.empty() && pts.back().p == iPt ) {
+ return -1;
+ }
+
+ int const n = pts.size();
+ pts.emplace_back(mvto ? polyline_moveto : polyline_lineto, iPt);
+ return n;
+}
+
+
+int Path::ReplacePoint(Geom::Point const &iPt)
+{
+ if (pts.empty()) {
+ return -1;
+ }
+
+ int const n = pts.size() - 1;
+ pts[n] = path_lineto(polyline_lineto, iPt);
+ return n;
+}
+
+
+int Path::AddPoint(Geom::Point const &iPt, int ip, double it, bool mvto)
+{
+ if (! back) {
+ return AddPoint (iPt, mvto);
+ }
+
+ if ( !mvto && !pts.empty() && pts.back().p == iPt ) {
+ return -1;
+ }
+
+ int const n = pts.size();
+ pts.emplace_back(mvto ? polyline_moveto : polyline_lineto, iPt, ip, it);
+ return n;
+}
+
+int Path::AddForcedPoint(Geom::Point const &iPt)
+{
+ if (back) {
+ return AddForcedPoint (iPt, -1, 0.0);
+ }
+
+ if ( pts.empty() || pts.back().isMoveTo != polyline_lineto ) {
+ return -1;
+ }
+
+ int const n = pts.size();
+ pts.emplace_back(polyline_forced, pts[n - 1].p);
+ return n;
+}
+
+
+int Path::AddForcedPoint(Geom::Point const &iPt, int /*ip*/, double /*it*/)
+{
+ /* FIXME: ip & it aren't used. Is this deliberate? */
+ if (!back) {
+ return AddForcedPoint (iPt);
+ }
+
+ if ( pts.empty() || pts.back().isMoveTo != polyline_lineto ) {
+ return -1;
+ }
+
+ int const n = pts.size();
+ pts.emplace_back(polyline_forced, pts[n - 1].p, pts[n - 1].piece, pts[n - 1].t);
+ return n;
+}
+
+void Path::PolylineBoundingBox(double &l, double &t, double &r, double &b)
+{
+ l = t = r = b = 0.0;
+ if ( pts.empty() ) {
+ return;
+ }
+
+ std::vector<path_lineto>::const_iterator i = pts.begin();
+ l = r = i->p[Geom::X];
+ t = b = i->p[Geom::Y];
+ ++i;
+
+ for (; i != pts.end(); ++i) {
+ r = std::max(r, i->p[Geom::X]);
+ l = std::min(l, i->p[Geom::X]);
+ b = std::max(b, i->p[Geom::Y]);
+ t = std::min(t, i->p[Geom::Y]);
+ }
+}
+
+
+/**
+ * \param piece Index of a one of our commands.
+ * \param at Distance along the segment that corresponds to `piece' (0 <= at <= 1)
+ * \param pos Filled in with the point at `at' on `piece'.
+ */
+
+void Path::PointAt(int piece, double at, Geom::Point &pos)
+{
+ if (piece < 0 || piece >= int(descr_cmd.size())) {
+ // this shouldn't happen: the piece we are asked for doesn't
+ // exist in the path
+ pos = Geom::Point(0,0);
+ return;
+ }
+
+ PathDescr const *theD = descr_cmd[piece];
+ int const typ = theD->getType();
+ Geom::Point tgt;
+ double len;
+ double rad;
+
+ if (typ == descr_moveto) {
+
+ return PointAt (piece + 1, 0.0, pos);
+
+ } else if (typ == descr_close || typ == descr_forced) {
+
+ return PointAt (piece - 1, 1.0, pos);
+
+ } else if (typ == descr_lineto) {
+
+ PathDescrLineTo const *nData = dynamic_cast<PathDescrLineTo const *>(theD);
+ TangentOnSegAt(at, PrevPoint (piece - 1), *nData, pos, tgt, len);
+
+ } else if (typ == descr_arcto) {
+
+ PathDescrArcTo const *nData = dynamic_cast<PathDescrArcTo const *>(theD);
+ TangentOnArcAt(at,PrevPoint (piece - 1), *nData, pos, tgt, len, rad);
+
+ } else if (typ == descr_cubicto) {
+
+ PathDescrCubicTo const *nData = dynamic_cast<PathDescrCubicTo const *>(theD);
+ TangentOnCubAt(at, PrevPoint (piece - 1), *nData, false, pos, tgt, len, rad);
+
+ } else if (typ == descr_bezierto || typ == descr_interm_bezier) {
+
+ int bez_st = piece;
+ while (bez_st >= 0) {
+ int nt = descr_cmd[bez_st]->getType();
+ if (nt == descr_bezierto)
+ break;
+ bez_st--;
+ }
+ if ( bez_st < 0 ) {
+ // Didn't find the beginning of the spline (bad).
+ // [pas trouvé le dubut de la spline (mauvais)]
+ return PointAt(piece - 1, 1.0, pos);
+ }
+
+ PathDescrBezierTo *stB = dynamic_cast<PathDescrBezierTo *>(descr_cmd[bez_st]);
+ if ( piece > bez_st + stB->nb ) {
+ // The spline goes past the authorized number of commands (bad).
+ // [la spline sort du nombre de commandes autorisé (mauvais)]
+ return PointAt(piece - 1, 1.0, pos);
+ }
+
+ int k = piece - bez_st;
+ Geom::Point const bStPt = PrevPoint(bez_st - 1);
+ if (stB->nb == 1 || k <= 0) {
+ PathDescrIntermBezierTo *nData = dynamic_cast<PathDescrIntermBezierTo *>(descr_cmd[bez_st + 1]);
+ TangentOnBezAt(at, bStPt, *nData, *stB, false, pos, tgt, len, rad);
+ } else {
+ // forcement plus grand que 1
+ if (k == 1) {
+ PathDescrIntermBezierTo *nextI = dynamic_cast<PathDescrIntermBezierTo *>(descr_cmd[bez_st + 1]);
+ PathDescrIntermBezierTo *nnextI = dynamic_cast<PathDescrIntermBezierTo *>(descr_cmd[bez_st + 2]);
+ PathDescrBezierTo fin(0.5 * (nextI->p + nnextI->p), 1);
+ TangentOnBezAt(at, bStPt, *nextI, fin, false, pos, tgt, len, rad);
+ } else if (k == stB->nb) {
+ PathDescrIntermBezierTo *nextI = dynamic_cast<PathDescrIntermBezierTo *>(descr_cmd[bez_st + k]);
+ PathDescrIntermBezierTo *prevI = dynamic_cast<PathDescrIntermBezierTo *>(descr_cmd[bez_st + k - 1]);
+ Geom::Point stP = 0.5 * ( prevI->p + nextI->p );
+ TangentOnBezAt(at, stP, *nextI, *stB, false, pos, tgt, len, rad);
+ } else {
+ PathDescrIntermBezierTo *nextI = dynamic_cast<PathDescrIntermBezierTo *>(descr_cmd[bez_st + k]);
+ PathDescrIntermBezierTo *prevI = dynamic_cast<PathDescrIntermBezierTo *>(descr_cmd[bez_st + k - 1]);
+ PathDescrIntermBezierTo *nnextI = dynamic_cast<PathDescrIntermBezierTo *>(descr_cmd[bez_st + k + 1]);
+ Geom::Point stP = 0.5 * ( prevI->p + nextI->p );
+ PathDescrBezierTo fin(0.5 * (nextI->p + nnextI->p), 1);
+ TangentOnBezAt(at, stP, *nextI, fin, false, pos, tgt, len, rad);
+ }
+ }
+ }
+}
+
+
+void Path::PointAndTangentAt(int piece, double at, Geom::Point &pos, Geom::Point &tgt)
+{
+ if (piece < 0 || piece >= int(descr_cmd.size())) {
+ // this shouldn't happen: the piece we are asked for doesn't exist in the path
+ pos = Geom::Point(0, 0);
+ return;
+ }
+
+ PathDescr const *theD = descr_cmd[piece];
+ int typ = theD->getType();
+ double len;
+ double rad;
+ if (typ == descr_moveto) {
+
+ return PointAndTangentAt(piece + 1, 0.0, pos, tgt);
+
+ } else if (typ == descr_close ) {
+
+ int cp = piece - 1;
+ while ( cp >= 0 && (descr_cmd[cp]->getType()) != descr_moveto ) {
+ cp--;
+ }
+ if ( cp >= 0 ) {
+ PathDescrMoveTo *nData = dynamic_cast<PathDescrMoveTo *>(descr_cmd[cp]);
+ PathDescrLineTo dst(nData->p);
+ TangentOnSegAt(at, PrevPoint (piece - 1), dst, pos, tgt, len);
+ }
+
+ } else if ( typ == descr_forced) {
+
+ return PointAndTangentAt(piece - 1, 1.0, pos,tgt);
+
+ } else if (typ == descr_lineto) {
+
+ PathDescrLineTo const *nData = dynamic_cast<PathDescrLineTo const *>(theD);
+ TangentOnSegAt(at, PrevPoint (piece - 1), *nData, pos, tgt, len);
+
+ } else if (typ == descr_arcto) {
+
+ PathDescrArcTo const *nData = dynamic_cast<PathDescrArcTo const *>(theD);
+ TangentOnArcAt (at,PrevPoint (piece - 1), *nData, pos, tgt, len, rad);
+
+ } else if (typ == descr_cubicto) {
+
+ PathDescrCubicTo const *nData = dynamic_cast<PathDescrCubicTo const *>(theD);
+ TangentOnCubAt (at, PrevPoint (piece - 1), *nData, false, pos, tgt, len, rad);
+
+ } else if (typ == descr_bezierto || typ == descr_interm_bezier) {
+ int bez_st = piece;
+ while (bez_st >= 0) {
+ int nt = descr_cmd[bez_st]->getType();
+ if (nt == descr_bezierto) break;
+ bez_st--;
+ }
+ if ( bez_st < 0 ) {
+ return PointAndTangentAt(piece - 1, 1.0, pos, tgt);
+ // Didn't find the beginning of the spline (bad).
+ // [pas trouvé le dubut de la spline (mauvais)]
+ }
+
+ PathDescrBezierTo* stB = dynamic_cast<PathDescrBezierTo*>(descr_cmd[bez_st]);
+ if ( piece > bez_st + stB->nb ) {
+ return PointAndTangentAt(piece - 1, 1.0, pos, tgt);
+ // The spline goes past the number of authorized commands (bad).
+ // [la spline sort du nombre de commandes autorisé (mauvais)]
+ }
+
+ int k = piece - bez_st;
+ Geom::Point const bStPt(PrevPoint( bez_st - 1 ));
+ if (stB->nb == 1 || k <= 0) {
+ PathDescrIntermBezierTo* nData = dynamic_cast<PathDescrIntermBezierTo *>(descr_cmd[bez_st + 1]);
+ TangentOnBezAt (at, bStPt, *nData, *stB, false, pos, tgt, len, rad);
+ } else {
+ // forcement plus grand que 1
+ if (k == 1) {
+ PathDescrIntermBezierTo *nextI = dynamic_cast<PathDescrIntermBezierTo *>(descr_cmd[bez_st + 1]);
+ PathDescrIntermBezierTo *nnextI = dynamic_cast<PathDescrIntermBezierTo *>(descr_cmd[bez_st + 2]);
+ PathDescrBezierTo fin(0.5 * (nextI->p + nnextI->p), 1);
+ TangentOnBezAt(at, bStPt, *nextI, fin, false, pos, tgt, len, rad);
+ } else if (k == stB->nb) {
+ PathDescrIntermBezierTo *prevI = dynamic_cast<PathDescrIntermBezierTo *>(descr_cmd[bez_st + k - 1]);
+ PathDescrIntermBezierTo *nextI = dynamic_cast<PathDescrIntermBezierTo *>(descr_cmd[bez_st + k]);
+ Geom::Point stP = 0.5 * ( prevI->p + nextI->p );
+ TangentOnBezAt(at, stP, *nextI, *stB, false, pos, tgt, len, rad);
+ } else {
+ PathDescrIntermBezierTo *prevI = dynamic_cast<PathDescrIntermBezierTo *>(descr_cmd[bez_st + k - 1]);
+ PathDescrIntermBezierTo *nextI = dynamic_cast<PathDescrIntermBezierTo *>(descr_cmd[bez_st + k]);
+ PathDescrIntermBezierTo *nnextI = dynamic_cast<PathDescrIntermBezierTo *>(descr_cmd[bez_st + k + 1]);
+ Geom::Point stP = 0.5 * ( prevI->p + nextI->p );
+ PathDescrBezierTo fin(0.5 * (nnextI->p + nnextI->p), 1);
+ TangentOnBezAt(at, stP, *nextI, fin, false, pos, tgt, len, rad);
+ }
+ }
+ }
+}
+
+/**
+ * Apply a transform in-place.
+ *
+ * Note: Converts to Geom::PathVector, applies the transform, and converts back.
+ */
+void Path::Transform(const Geom::Affine &trans)
+{
+ LoadPathVector(MakePathVector() * trans);
+}
+
+void Path::FastBBox(double &l,double &t,double &r,double &b)
+{
+ l = t = r = b = 0;
+ bool empty = true;
+ Geom::Point lastP(0, 0);
+
+ for (auto & i : descr_cmd) {
+ int const typ = i->getType();
+ switch ( typ ) {
+ case descr_lineto:
+ {
+ PathDescrLineTo *nData = dynamic_cast<PathDescrLineTo *>(i);
+ if ( empty ) {
+ l = r = nData->p[Geom::X];
+ t = b = nData->p[Geom::Y];
+ empty = false;
+ } else {
+ if ( nData->p[Geom::X] < l ) {
+ l = nData->p[Geom::X];
+ }
+ if ( nData->p[Geom::X] > r ) {
+ r = nData->p[Geom::X];
+ }
+ if ( nData->p[Geom::Y] < t ) {
+ t = nData->p[Geom::Y];
+ }
+ if ( nData->p[Geom::Y] > b ) {
+ b = nData->p[Geom::Y];
+ }
+ }
+ lastP = nData->p;
+ }
+ break;
+
+ case descr_moveto:
+ {
+ PathDescrMoveTo *nData = dynamic_cast<PathDescrMoveTo *>(i);
+ if ( empty ) {
+ l = r = nData->p[Geom::X];
+ t = b = nData->p[Geom::Y];
+ empty = false;
+ } else {
+ if ( nData->p[Geom::X] < l ) {
+ l = nData->p[Geom::X];
+ }
+ if ( nData->p[Geom::X] > r ) {
+ r = nData->p[Geom::X];
+ }
+ if ( nData->p[Geom::Y] < t ) {
+ t = nData->p[Geom::Y];
+ }
+ if ( nData->p[Geom::Y] > b ) {
+ b = nData->p[Geom::Y];
+ }
+ }
+ lastP = nData->p;
+ }
+ break;
+
+ case descr_arcto:
+ {
+ PathDescrArcTo *nData = dynamic_cast<PathDescrArcTo *>(i);
+ if ( empty ) {
+ l = r = nData->p[Geom::X];
+ t = b = nData->p[Geom::Y];
+ empty = false;
+ } else {
+ if ( nData->p[Geom::X] < l ) {
+ l = nData->p[Geom::X];
+ }
+ if ( nData->p[Geom::X] > r ) {
+ r = nData->p[Geom::X];
+ }
+ if ( nData->p[Geom::Y] < t ) {
+ t = nData->p[Geom::Y];
+ }
+ if ( nData->p[Geom::Y] > b ) {
+ b = nData->p[Geom::Y];
+ }
+ }
+ lastP = nData->p;
+ }
+ break;
+
+ case descr_cubicto:
+ {
+ PathDescrCubicTo *nData = dynamic_cast<PathDescrCubicTo *>(i);
+ if ( empty ) {
+ l = r = nData->p[Geom::X];
+ t = b = nData->p[Geom::Y];
+ empty = false;
+ } else {
+ if ( nData->p[Geom::X] < l ) {
+ l = nData->p[Geom::X];
+ }
+ if ( nData->p[Geom::X] > r ) {
+ r = nData->p[Geom::X];
+ }
+ if ( nData->p[Geom::Y] < t ) {
+ t = nData->p[Geom::Y];
+ }
+ if ( nData->p[Geom::Y] > b ) {
+ b = nData->p[Geom::Y];
+ }
+ }
+
+/* bug 249665: "...the calculation of the bounding-box for cubic-paths
+has some extra steps to make it work correctly in Win32 that unfortunately
+are unnecessary in Linux, generating wrong results. This only shows in
+Type1 fonts because they use cubic-paths instead of the
+bezier-paths used by True-Type fonts."
+*/
+
+#ifdef _WIN32
+ Geom::Point np = nData->p - nData->end;
+ if ( np[Geom::X] < l ) {
+ l = np[Geom::X];
+ }
+ if ( np[Geom::X] > r ) {
+ r = np[Geom::X];
+ }
+ if ( np[Geom::Y] < t ) {
+ t = np[Geom::Y];
+ }
+ if ( np[Geom::Y] > b ) {
+ b = np[Geom::Y];
+ }
+
+ np = lastP + nData->start;
+ if ( np[Geom::X] < l ) {
+ l = np[Geom::X];
+ }
+ if ( np[Geom::X] > r ) {
+ r = np[Geom::X];
+ }
+ if ( np[Geom::Y] < t ) {
+ t = np[Geom::Y];
+ }
+ if ( np[Geom::Y] > b ) {
+ b = np[Geom::Y];
+ }
+#endif
+
+ lastP = nData->p;
+ }
+ break;
+
+ case descr_bezierto:
+ {
+ PathDescrBezierTo *nData = dynamic_cast<PathDescrBezierTo *>(i);
+ if ( empty ) {
+ l = r = nData->p[Geom::X];
+ t = b = nData->p[Geom::Y];
+ empty = false;
+ } else {
+ if ( nData->p[Geom::X] < l ) {
+ l = nData->p[Geom::X];
+ }
+ if ( nData->p[Geom::X] > r ) {
+ r = nData->p[Geom::X];
+ }
+ if ( nData->p[Geom::Y] < t ) {
+ t = nData->p[Geom::Y];
+ }
+ if ( nData->p[Geom::Y] > b ) {
+ b = nData->p[Geom::Y];
+ }
+ }
+ lastP = nData->p;
+ }
+ break;
+
+ case descr_interm_bezier:
+ {
+ PathDescrIntermBezierTo *nData = dynamic_cast<PathDescrIntermBezierTo *>(i);
+ if ( empty ) {
+ l = r = nData->p[Geom::X];
+ t = b = nData->p[Geom::Y];
+ empty = false;
+ } else {
+ if ( nData->p[Geom::X] < l ) {
+ l = nData->p[Geom::X];
+ }
+ if ( nData->p[Geom::X] > r ) {
+ r = nData->p[Geom::X];
+ }
+ if ( nData->p[Geom::Y] < t ) {
+ t = nData->p[Geom::Y];
+ }
+ if ( nData->p[Geom::Y] > b ) {
+ b = nData->p[Geom::Y];
+ }
+ }
+ }
+ break;
+ }
+ }
+}
+
+char *Path::svg_dump_path() const
+{
+ Inkscape::SVGOStringStream os;
+
+ for (int i = 0; i < int(descr_cmd.size()); i++) {
+ Geom::Point const p = (i == 0) ? Geom::Point(0, 0) : PrevPoint(i - 1);
+ descr_cmd[i]->dumpSVG(os, p);
+ }
+
+ return g_strdup (os.str().c_str());
+}
+
+// Find out if the segment that corresponds to 'piece' is a straight line
+bool Path::IsLineSegment(int piece)
+{
+ if (piece < 0 || piece >= int(descr_cmd.size())) {
+ return false;
+ }
+
+ PathDescr const *theD = descr_cmd[piece];
+ int const typ = theD->getType();
+
+ return (typ == descr_lineto);
+}
+
+
+/*
+ Local Variables:
+ mode:c++
+ c-file-style:"stroustrup"
+ c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
+ indent-tabs-mode:nil
+ fill-column:99
+ End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-18 01:55:03 +0000