From cca66b9ec4e494c1d919bff0f71a820d8afab1fa Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:24:48 +0200 Subject: Adding upstream version 1.2.2. Signed-off-by: Daniel Baumann --- src/path/path-util.cpp | 199 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 199 insertions(+) create mode 100644 src/path/path-util.cpp (limited to 'src/path/path-util.cpp') diff --git a/src/path/path-util.cpp b/src/path/path-util.cpp new file mode 100644 index 0000000..c8af3e0 --- /dev/null +++ b/src/path/path-util.cpp @@ -0,0 +1,199 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/** @file + * Path utilities. + *//* + * Authors: + * see git history + * Created by fred on Fri Dec 05 2003. + * tweaked endlessly by bulia byak + * + * Copyright (C) 2018 Authors + * Released under GNU GPL v2+, read the file 'COPYING' for more information. + */ + +#ifdef HAVE_CONFIG_H +#endif + +#include + +#include "path-util.h" + +#include "text-editing.h" + +#include "livarot/Path.h" +#include "livarot/Shape.h" + +#include "object/sp-flowtext.h" +#include "object/sp-image.h" +#include "object/sp-marker.h" +#include "object/sp-path.h" +#include "object/sp-text.h" + +#include "display/curve.h" + +// derived from Path_for_item +Path * +Path_for_pathvector(Geom::PathVector const &epathv) +{ + /*std::cout << "converting to Livarot path" << std::endl; + + Geom::SVGPathWriter wr; + wr.feed(epathv); + std::cout << wr.str() << std::endl;*/ + + Path *dest = new Path; + dest->LoadPathVector(epathv); + return dest; +} + +Path * +Path_for_item(SPItem *item, bool doTransformation, bool transformFull) +{ + std::unique_ptr curve = curve_for_item(item); + + if (curve == nullptr) + return nullptr; + + Geom::PathVector *pathv = + pathvector_for_curve(item, curve.get(), doTransformation, transformFull, Geom::identity(), Geom::identity()); + + /*std::cout << "converting to Livarot path" << std::endl; + + Geom::SVGPathWriter wr; + if (pathv) { + wr.feed(*pathv); + } + std::cout << wr.str() << std::endl;*/ + + Path *dest = new Path; + dest->LoadPathVector(*pathv); + delete pathv; + + /*gchar *str = dest->svg_dump_path(); + std::cout << "After conversion:\n" << str << std::endl; + g_free(str);*/ + + return dest; +} + +/** + * Obtains an item's Path before the LPE stack has been applied. + */ +Path * +Path_for_item_before_LPE(SPItem *item, bool doTransformation, bool transformFull) +{ + std::unique_ptr curve = curve_for_item_before_LPE(item); + + if (curve == nullptr) + return nullptr; + + Geom::PathVector *pathv = + pathvector_for_curve(item, curve.get(), doTransformation, transformFull, Geom::identity(), Geom::identity()); + + Path *dest = new Path; + dest->LoadPathVector(*pathv); + delete pathv; + + return dest; +} + +/* + * NOTE: Returns empty pathvector if curve == NULL + * TODO: see if calling this method can be optimized. All the pathvector copying might be slow. + */ +Geom::PathVector* +pathvector_for_curve(SPItem *item, SPCurve *curve, bool doTransformation, bool transformFull, Geom::Affine extraPreAffine, Geom::Affine extraPostAffine) +{ + if (curve == nullptr) + return nullptr; + + Geom::PathVector *dest = new Geom::PathVector; + *dest = curve->get_pathvector(); // Make a copy; must be freed by the caller! + + if (doTransformation) { + if (transformFull) { + *dest *= extraPreAffine * item->i2doc_affine() * extraPostAffine; + } else { + *dest *= extraPreAffine * (Geom::Affine)item->transform * extraPostAffine; + } + } else { + *dest *= extraPreAffine * extraPostAffine; + } + + return dest; +} + +/** + * Obtains an item's curve. For SPPath, it is the path *before* LPE. For SPShapes other than path, it is the path *after* LPE. + * So the result is somewhat ill-defined, and probably this method should not be used... See curve_for_item_before_LPE. + */ +std::unique_ptr curve_for_item(SPItem *item) +{ + if (!item) + return nullptr; + + std::unique_ptr curve; + + if (auto path = dynamic_cast(item)) { + curve = SPCurve::copy(path->curveForEdit()); + } else if (auto shape = dynamic_cast(item)) { + curve = SPCurve::copy(shape->curve()); + } else if (SP_IS_TEXT(item) || SP_IS_FLOWTEXT(item)) { + curve = te_get_layout(item)->convertToCurves(); + } else if (auto image = dynamic_cast(item)) { + curve = image->get_curve(); + } + + return curve; +} + +/** + * Obtains an item's curve *before* LPE. + */ +std::unique_ptr curve_for_item_before_LPE(SPItem *item) +{ + if (!item) + return nullptr; + + std::unique_ptr curve; + + if (auto shape = dynamic_cast(item)) { + curve = SPCurve::copy(shape->curveForEdit()); + } else if (SP_IS_TEXT(item) || SP_IS_FLOWTEXT(item)) { + curve = te_get_layout(item)->convertToCurves(); + } else if (auto image = dynamic_cast(item)) { + curve = image->get_curve(); + } + + return curve; +} + +std::optional get_nearest_position_on_Path(Path *path, Geom::Point p, unsigned seg) +{ + std::optional result; + if (!path) { + return result; // returns empty std::optional + } + //get nearest position on path + result = path->PointToCurvilignPosition(p, seg); + return result; +} + +Geom::Point get_point_on_Path(Path *path, int piece, double t) +{ + Geom::Point p; + path->PointAt(piece, t, p); + return p; +} + + +/* + 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:fileencoding=utf-8:textwidth=99 : -- cgit v1.2.3