move live_effects/n-art-bpath-2geom.* to libnr/n-art-bpath-2geom.*

(bzr r5427)

2 files changed, 171 insertions, 0 deletions

diff --git a/src/libnr/n-art-bpath-2geom.cpp b/src/libnr/n-art-bpath-2geom.cpp
new file mode 100644
index 000000000..89ac85b2b
--- /dev/null
+++ b/src/libnr/n-art-bpath-2geom.cpp
@@ -0,0 +1,138 @@
+#define SEEN_LIBNR_N_ART_BPATH_2GEOM_CPP
+
+/** \file
+ * Contains functions to convert from NArtBpath to 2geom's Path
+ *
+ * Copyright (C) Johan Engelen 2007 <j.b.c.engelen@utwente.nl>
+ *
+ * Released under GNU GPL, read the file 'COPYING' for more information
+ */
+ 
+
+#include "libnr/n-art-bpath-2geom.h"
+#include "svg/svg.h"
+#include <glib.h>
+#include <2geom/path.h>
+#include <2geom/svg-path.h>
+#include <2geom/svg-path-parser.h>
+#include <2geom/sbasis-to-bezier.h>
+
+//##########################################################
+
+#include <iostream>
+#include <sstream>
+#include <string>
+#include <boost/format.hpp>
+
+static void curve_to_svgd(std::ostream & f, Geom::Curve const* c) {
+    if(Geom::LineSegment const *line_segment = dynamic_cast<Geom::LineSegment const  *>(c)) {
+        f << boost::format("L %g,%g ") % (*line_segment)[1][0] % (*line_segment)[1][1];
+    }
+    else if(Geom::QuadraticBezier const *quadratic_bezier = dynamic_cast<Geom::QuadraticBezier const  *>(c)) {
+        f << boost::format("Q %g,%g %g,%g ") % (*quadratic_bezier)[1][0] % (*quadratic_bezier)[1][0]  
+                % (*quadratic_bezier)[2][0] % (*quadratic_bezier)[2][1];
+    }
+    else if(Geom::CubicBezier const *cubic_bezier = dynamic_cast<Geom::CubicBezier const  *>(c)) {
+        f << boost::format("C %g,%g %g,%g %g,%g ") 
+                % (*cubic_bezier)[1][0] % (*cubic_bezier)[1][1] 
+                % (*cubic_bezier)[2][0] % (*cubic_bezier)[2][1] 
+                % (*cubic_bezier)[3][0] % (*cubic_bezier)[3][1];
+    }
+//    else if(Geom::SVGEllipticalArc const *svg_elliptical_arc = dynamic_cast<Geom::SVGEllipticalArc *>(c)) {
+//        //get at the innards and spit them out as svgd
+//    }
+    else { 
+        //this case handles sbasis as well as all other curve types
+        Geom::Path sbasis_path = Geom::path_from_sbasis(c->toSBasis(), 0.1);
+
+        //recurse to convert the new path resulting from the sbasis to svgd
+        for(Geom::Path::iterator iter = sbasis_path.begin(); iter != sbasis_path.end(); ++iter) {
+            curve_to_svgd(f, &(*iter));
+        }
+    }
+}
+
+static void write_svgd(std::ostream & f, Geom::Path const &p) {
+    if(f == NULL) {
+        f << "ERRRRRRORRRRR";
+        return;
+    }
+
+    f << boost::format("M %g,%g ") % p.initialPoint()[0] % p.initialPoint()[1];
+    
+    for(Geom::Path::const_iterator iter(p.begin()), end(p.end()); iter != end; ++iter) {
+        curve_to_svgd(f, &(*iter));
+    }
+    if(p.closed())
+        f << "Z ";
+}
+
+static void write_svgd(std::ostream & f, std::vector<Geom::Path> const &p) {
+    std::vector<Geom::Path>::const_iterator it(p.begin());
+    for(; it != p.end(); it++) {
+        write_svgd(f, *it);
+    }
+}
+
+std::vector<Geom::Path>  
+SVGD_to_2GeomPath (char const *svgd)
+{
+    std::vector<Geom::Path> pathv;
+
+    try {
+        pathv = Geom::parse_svg_path(svgd);
+    }
+    catch (std::runtime_error e) {
+        g_warning("SVGPathParseError: %s", e.what());
+    }
+
+    return pathv;
+}
+
+
+std::vector<Geom::Path>
+BPath_to_2GeomPath(NArtBpath const * bpath)
+{
+    std::vector<Geom::Path> pathv;
+    char *svgpath = sp_svg_write_path(bpath);
+    if (!svgpath) {
+        g_warning("BPath_to_2GeomPath - empty path returned");
+        return pathv;
+    }
+    pathv = SVGD_to_2GeomPath(svgpath);
+    g_free(svgpath);
+    return pathv;
+}
+
+char *
+SVGD_from_2GeomPath(std::vector<Geom::Path> const & path)
+{
+    std::ostringstream ss;
+    write_svgd(ss, path);
+    ss.flush();
+    std::string str = ss.str();
+    char * svgd = g_strdup(str.c_str());
+    return svgd;
+}
+
+NArtBpath *
+BPath_from_2GeomPath(std::vector<Geom::Path> const & path)
+{
+    char * svgd = SVGD_from_2GeomPath(path);
+    NArtBpath *bpath = sp_svg_read_path(svgd);
+    g_free(svgd);
+    return bpath;
+}
+
+
+
+/*
+  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 :
diff --git a/src/libnr/n-art-bpath-2geom.h b/src/libnr/n-art-bpath-2geom.h
new file mode 100644
index 000000000..21995656b
--- /dev/null
+++ b/src/libnr/n-art-bpath-2geom.h
@@ -0,0 +1,33 @@
+#ifndef SEEN_LIBNR_N_ART_BPATH_2GEOM_H
+#define SEEN_LIBNR_N_ART_BPATH_2GEOM_H
+
+/** \file
+ * Contains functions to convert from NArtBpath to 2geom's Path
+ *
+ * Copyright (C) Johan Engelen 2007 <j.b.c.engelen@utwente.nl>
+ *
+ * Released under GNU GPL, read the file 'COPYING' for more information
+ */
+
+#include <vector>
+#include <2geom/path.h>
+#include <libnr/n-art-bpath.h>
+
+std::vector<Geom::Path>  SVGD_to_2GeomPath (char const *svgd);
+std::vector<Geom::Path>  BPath_to_2GeomPath (NArtBpath const *bpath);
+char *                   SVGD_from_2GeomPath(std::vector<Geom::Path> const & path);
+NArtBpath *              BPath_from_2GeomPath (std::vector<Geom::Path> const & path);
+
+
+#endif /* !SEEN_LIBNR_N_ART_BPATH_2GEOM_H */
+
+/*
+  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 :