Adding upstream version 1.2.2.upstream/1.2.2upstream

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

1 files changed, 340 insertions, 0 deletions

diff --git a/src/extension/internal/latex-pstricks.cpp b/src/extension/internal/latex-pstricks.cpp
new file mode 100644
index 0000000..542a4bf
--- /dev/null
+++ b/src/extension/internal/latex-pstricks.cpp
@@ -0,0 +1,340 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * LaTeX Printing
+ *
+ * Author:
+ *  Michael Forbes <miforbes@mbhs.edu>
+ *   Abhishek Sharma
+ *
+ * Copyright (C) 2004 Authors
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include <2geom/pathvector.h>
+#include <2geom/sbasis-to-bezier.h>
+#include <2geom/curves.h>
+#include <cerrno>
+#include <csignal>
+#include "util/units.h"
+#include "helper/geom-curves.h"
+
+#include "extension/print.h"
+#include "extension/system.h"
+#include "inkscape-version.h"
+#include "io/sys.h"
+#include "latex-pstricks.h"
+#include "style.h"
+#include "document.h"
+#include <cstring>
+
+namespace Inkscape {
+namespace Extension {
+namespace Internal {
+
+PrintLatex::PrintLatex ():
+    _width(0),
+    _height(0),
+    _stream(nullptr)
+{
+}
+
+PrintLatex::~PrintLatex ()
+{
+    if (_stream) fclose(_stream);
+
+    /* restore default signal handling for SIGPIPE */
+#if !defined(_WIN32) && !defined(__WIN32__)
+    (void) signal(SIGPIPE, SIG_DFL);
+#endif
+	return;
+}
+
+unsigned int PrintLatex::setup(Inkscape::Extension::Print * /*mod*/)
+{
+    return TRUE;
+}
+
+unsigned int PrintLatex::begin (Inkscape::Extension::Print *mod, SPDocument *doc)
+{
+    Inkscape::SVGOStringStream os;
+    int res;
+    FILE *osf = nullptr;
+    const gchar * fn = nullptr;
+    gsize bytesRead = 0;
+    gsize bytesWritten = 0;
+    GError* error = nullptr;
+
+    os.setf(std::ios::fixed);
+    fn = mod->get_param_string("destination");
+    gchar* local_fn = g_filename_from_utf8( fn,
+                                            -1,  &bytesRead,  &bytesWritten, &error);
+    fn = local_fn;
+
+    /* TODO: Replace the below fprintf's with something that does the right thing whether in
+     * gui or batch mode (e.g. --print=blah).  Consider throwing an exception: currently one of
+     * the callers (sp_print_document_to_file, "ret = mod->begin(doc)") wrongly ignores the
+     * return code.
+     */
+    if (fn != nullptr) {
+        while (isspace(*fn)) fn += 1;
+        Inkscape::IO::dump_fopen_call(fn, "K");
+        osf = Inkscape::IO::fopen_utf8name(fn, "w+");
+        if (!osf) {
+            fprintf(stderr, "inkscape: fopen(%s): %s\n", fn, strerror(errno));
+            g_free(local_fn);
+            return 0;
+        }
+        _stream = osf;
+    }
+
+    g_free(local_fn);
+
+    /* fixme: this is kinda icky */
+#if !defined(_WIN32) && !defined(__WIN32__)
+    (void) signal(SIGPIPE, SIG_IGN);
+#endif
+
+    res = fprintf(_stream, "%%LaTeX with PSTricks extensions\n");
+    /* flush this to test output stream as early as possible */
+    if (fflush(_stream)) {
+        /*g_print("caught error in sp_module_print_plain_begin\n");*/
+        if (ferror(_stream)) {
+            g_print("Error %d on output stream: %s\n", errno,
+                    g_strerror(errno));
+        }
+        g_print("Printing failed\n");
+        /* fixme: should use pclose() for pipes */
+        fclose(_stream);
+        _stream = nullptr;
+        fflush(stdout);
+        return 0;
+    }
+
+    // width and height in pt
+    _width = doc->getWidth().value("pt");
+    _height = doc->getHeight().value("pt");
+
+    if (res >= 0) {
+
+        os << "%%Creator: Inkscape " << Inkscape::version_string << "\n";
+        os << "%%Please note this file requires PSTricks extensions\n";
+
+        os << "\\psset{xunit=.5pt,yunit=.5pt,runit=.5pt}\n";
+        // from now on we can output px, but they will be treated as pt
+
+        os << "\\begin{pspicture}(" << doc->getWidth().value("px") << "," << doc->getHeight().value("px") << ")\n";
+    }
+
+    m_tr_stack.push( Geom::Scale(1, -1) * Geom::Translate(0, doc->getHeight().value("px")));  /// @fixme hardcoded doc2dt transform
+
+    return fprintf(_stream, "%s", os.str().c_str());
+}
+
+unsigned int PrintLatex::finish(Inkscape::Extension::Print * /*mod*/)
+{
+    if (_stream) {
+        fprintf(_stream, "\\end{pspicture}\n");
+
+        // Flush stream to be sure.
+        fflush(_stream);
+
+        fclose(_stream);
+        _stream = nullptr;
+    }
+    return 0;
+}
+
+unsigned int PrintLatex::bind(Inkscape::Extension::Print * /*mod*/, Geom::Affine const &transform, float /*opacity*/)
+{
+    if (!m_tr_stack.empty()) {
+        Geom::Affine tr_top = m_tr_stack.top();
+        m_tr_stack.push(transform * tr_top);
+    } else {
+        m_tr_stack.push(transform);
+    }
+
+    return 1;
+}
+
+unsigned int PrintLatex::release(Inkscape::Extension::Print * /*mod*/)
+{
+    m_tr_stack.pop();
+    return 1;
+}
+
+unsigned int PrintLatex::fill(Inkscape::Extension::Print * /*mod*/,
+                              Geom::PathVector const &pathv, Geom::Affine const &transform, SPStyle const *style,
+                              Geom::OptRect const & /*pbox*/, Geom::OptRect const & /*dbox*/, Geom::OptRect const & /*bbox*/)
+{
+    if (!_stream) {
+        return 0; // XXX: fixme, returning -1 as unsigned.
+    }
+
+    if (style->fill.isColor()) {
+        Inkscape::SVGOStringStream os;
+        float rgb[3];
+        float fill_opacity;
+
+        os.setf(std::ios::fixed);
+
+        fill_opacity=SP_SCALE24_TO_FLOAT(style->fill_opacity.value);
+        style->fill.value.color.get_rgb_floatv(rgb);
+        os << "{\n\\newrgbcolor{curcolor}{" << rgb[0] << " " << rgb[1] << " " << rgb[2] << "}\n";
+        os << "\\pscustom[linestyle=none,fillstyle=solid,fillcolor=curcolor";
+        if (fill_opacity!=1.0) {
+            os << ",opacity="<<fill_opacity;
+        }
+
+        os << "]\n{\n";
+
+        print_pathvector(os, pathv, transform);
+
+        os << "}\n}\n";
+
+        fprintf(_stream, "%s", os.str().c_str());
+    }
+
+    return 0;
+}
+
+unsigned int PrintLatex::stroke(Inkscape::Extension::Print * /*mod*/,
+                                Geom::PathVector const &pathv, Geom::Affine const &transform, SPStyle const *style,
+                                Geom::OptRect const & /*pbox*/, Geom::OptRect const & /*dbox*/, Geom::OptRect const & /*bbox*/)
+{
+    if (!_stream) {
+        return 0; // XXX: fixme, returning -1 as unsigned.
+    }
+
+    if (style->stroke.isColor()) {
+        Inkscape::SVGOStringStream os;
+        float rgb[3];
+        float stroke_opacity;
+        Geom::Affine tr_stack = m_tr_stack.top();
+        double const scale = tr_stack.descrim();
+        os.setf(std::ios::fixed);
+
+        stroke_opacity=SP_SCALE24_TO_FLOAT(style->stroke_opacity.value);
+        style->stroke.value.color.get_rgb_floatv(rgb);
+        os << "{\n\\newrgbcolor{curcolor}{" << rgb[0] << " " << rgb[1] << " " << rgb[2] << "}\n";
+
+        os << "\\pscustom[linewidth=" << style->stroke_width.computed*scale<< ",linecolor=curcolor";
+
+        if (stroke_opacity!=1.0) {
+            os<<",strokeopacity="<<stroke_opacity;
+        }
+
+        if (style->stroke_dasharray.set &&  !style->stroke_dasharray.values.empty()) {
+            os << ",linestyle=dashed,dash=";
+            for (unsigned i = 0; i < style->stroke_dasharray.values.size(); i++) {
+                if ((i)) {
+                    os << " ";
+                }
+                os << style->stroke_dasharray.values[i].value;
+            }
+        }
+
+        os <<"]\n{\n";
+
+        print_pathvector(os, pathv, transform);
+
+        os << "}\n}\n";
+
+        fprintf(_stream, "%s", os.str().c_str());
+    }
+
+    return 0;
+}
+
+// FIXME: why is 'transform' argument not used?
+void
+PrintLatex::print_pathvector(SVGOStringStream &os, Geom::PathVector const &pathv_in, const Geom::Affine & /*transform*/)
+{
+    if (pathv_in.empty())
+        return;
+
+//    Geom::Affine tf=transform;   // why was this here?
+    Geom::Affine tf_stack=m_tr_stack.top(); // and why is transform argument not used?
+    Geom::PathVector pathv = pathv_in * tf_stack; // generates new path, which is a bit slow, but this doesn't have to be performance optimized
+
+    os << "\\newpath\n";
+
+    for(const auto & it : pathv) {
+
+        os << "\\moveto(" << it.initialPoint()[Geom::X] << "," << it.initialPoint()[Geom::Y] << ")\n";
+
+        for(Geom::Path::const_iterator cit = it.begin(); cit != it.end_open(); ++cit) {
+            print_2geomcurve(os, *cit);
+        }
+
+        if (it.closed()) {
+            os << "\\closepath\n";
+        }
+
+    }
+}
+
+void
+PrintLatex::print_2geomcurve(SVGOStringStream &os, Geom::Curve const &c)
+{
+    using Geom::X;
+    using Geom::Y;
+
+    if( is_straight_curve(c) )
+    {
+        os << "\\lineto(" << c.finalPoint()[X] << "," << c.finalPoint()[Y] << ")\n";
+    }
+    else if(Geom::CubicBezier const *cubic_bezier = dynamic_cast<Geom::CubicBezier const*>(&c)) {
+        std::vector<Geom::Point> points = cubic_bezier->controlPoints();
+        os << "\\curveto(" << points[1][X] << "," << points[1][Y] << ")("
+                           << points[2][X] << "," << points[2][Y] << ")("
+                           << points[3][X] << "," << points[3][Y] << ")\n";
+    }
+    else {
+        //this case handles sbasis as well as all other curve types
+        Geom::Path sbasis_path = Geom::cubicbezierpath_from_sbasis(c.toSBasis(), 0.1);
+
+        for(const auto & iter : sbasis_path) {
+            print_2geomcurve(os, iter);
+        }
+    }
+}
+
+bool
+PrintLatex::textToPath(Inkscape::Extension::Print * ext)
+{
+    return ext->get_param_bool("textToPath");
+}
+
+#include "clear-n_.h"
+
+void PrintLatex::init()
+{
+    /* SVG in */
+    // clang-format off
+    Inkscape::Extension::build_from_mem(
+        "<inkscape-extension xmlns=\"" INKSCAPE_EXTENSION_URI "\">\n"
+            "<name>" N_("LaTeX Print") "</name>\n"
+            "<id>" SP_MODULE_KEY_PRINT_LATEX "</id>\n"
+            "<param gui-hidden=\"true\" name=\"destination\" type=\"string\"></param>\n"
+            "<param gui-hidden=\"true\" name=\"textToPath\" type=\"bool\">true</param>\n"
+            "<print/>\n"
+        "</inkscape-extension>", new PrintLatex());
+    // clang-format on
+}
+
+}  /* namespace Internal */
+}  /* namespace Extension */
+}  /* namespace Inkscape */
+
+/*
+  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 :
+