Adding upstream version 1.3.upstream/1.3upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 128 insertions, 0 deletions

diff --git a/src/toys/lpe-framework.cpp b/src/toys/lpe-framework.cpp
new file mode 100644
index 0000000..19f7267
--- /dev/null
+++ b/src/toys/lpe-framework.cpp
@@ -0,0 +1,128 @@
+/*
+ * A framework for writing an Inkscape Live Path Effect (LPE) toy.
+ *
+ * Copyright 2009  Johan Engelen <goejendaagh@zonnet.nl>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it either under the terms of the GNU Lesser General Public
+ * License version 2.1 as published by the Free Software Foundation
+ * (the "LGPL") or, at your option, under the terms of the Mozilla
+ * Public License Version 1.1 (the "MPL"). If you do not alter this
+ * notice, a recipient may use your version of this file under either
+ * the MPL or the LGPL.
+ *
+ * You should have received a copy of the LGPL along with this library
+ * in the file COPYING-LGPL-2.1; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * You should have received a copy of the MPL along with this library
+ * in the file COPYING-MPL-1.1
+ *
+ * The contents of this file are subject to the Mozilla Public License
+ * Version 1.1 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
+ * OF ANY KIND, either express or implied. See the LGPL or the MPL for
+ * the specific language governing rights and limitations.
+ *
+ */
+ 
+#include <string.h>
+#include <stdint.h>
+#include <toys/lpe-framework.h>
+
+#include <2geom/sbasis-to-bezier.h>
+#include <2geom/affine.h>
+#include <2geom/pathvector.h>
+
+#define  LPE_CONVERSION_TOLERANCE 0.01
+
+/**
+ * When the input path handles are moved, this method is called to re-execute the LPE and draw the result.
+ */
+void LPEToy::draw(cairo_t *cr, std::ostringstream *notify, int width, int height, bool save, std::ostringstream *timer_stream)
+{
+    using namespace Geom;
+
+    Piecewise<D2<SBasis> > pwd2(curve_handle.asBezier());
+    PathVector A = Geom::path_from_piecewise( pwd2, LPE_CONVERSION_TOLERANCE);
+    cairo_set_line_width (cr, 2);
+    cairo_set_source_rgba (cr, 1., 0.0, 0., 1);
+    cairo_path(cr, A);
+    cairo_stroke(cr);
+
+    // perform the effect:
+    PathVector B = doEffect_path(A);
+
+    cairo_set_line_width (cr, 1);
+    cairo_set_source_rgba (cr, 0., 0.0, 0., 1);
+    cairo_path(cr, B);
+    cairo_stroke(cr);
+
+    Toy::draw(cr, notify, width, height, save,timer_stream);
+}
+
+/**
+ * Initializes the LPE toy, and sets a simple default input path.
+ */
+LPEToy::LPEToy(){
+    if(handles.empty()) {
+        handles.push_back(&curve_handle);
+        for(unsigned i = 0; i < 4; i++) {
+            curve_handle.push_back(150+uniform()*300,150+uniform()*300);
+        }
+    }
+}
+
+/*
+ *  Here be the doEffect function chain:  (this is copied code from Inkscape)
+ */
+Geom::PathVector
+LPEToy::doEffect_path (Geom::PathVector const &path_in)
+{
+    Geom::PathVector path_out;
+
+    if ( !concatenate_before_pwd2 ) {
+        // default behavior
+        for (const auto & i : path_in) {
+            Geom::Piecewise<Geom::D2<Geom::SBasis> > pwd2_in = i.toPwSb();
+            Geom::Piecewise<Geom::D2<Geom::SBasis> > pwd2_out = doEffect_pwd2(pwd2_in);
+            Geom::PathVector path = Geom::path_from_piecewise( pwd2_out, LPE_CONVERSION_TOLERANCE);
+            // add the output path vector to the already accumulated vector:
+            for (const auto & j : path) {
+                path_out.push_back(j);
+            }
+        }
+    } else {
+      // concatenate the path into possibly discontinuous pwd2
+        Geom::Piecewise<Geom::D2<Geom::SBasis> > pwd2_in;
+        for (const auto & i : path_in) {
+            pwd2_in.concat( i.toPwSb() );
+        }
+        Geom::Piecewise<Geom::D2<Geom::SBasis> > pwd2_out = doEffect_pwd2(pwd2_in);
+        path_out = Geom::path_from_piecewise( pwd2_out, LPE_CONVERSION_TOLERANCE);
+    }
+
+    return path_out;
+}
+
+Geom::Piecewise<Geom::D2<Geom::SBasis> >
+LPEToy::doEffect_pwd2 (Geom::Piecewise<Geom::D2<Geom::SBasis> > const & pwd2_in)
+{
+    // default effect does nothing
+    return pwd2_in;
+}
+
+
+
+/*
+	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=4:softtabstop=4:fileencoding=utf-8:textwidth=99 :