Adding upstream version 1.2.2.upstream/1.2.2upstream

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

1 files changed, 227 insertions, 0 deletions

diff --git a/src/live_effects/parameter/random.cpp b/src/live_effects/parameter/random.cpp
new file mode 100644
index 0000000..42f5065
--- /dev/null
+++ b/src/live_effects/parameter/random.cpp
@@ -0,0 +1,227 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) Johan Engelen 2007 <j.b.c.engelen@utwente.nl>
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include "random.h"
+
+#include <glibmm/i18n.h>
+
+#include "live_effects/effect.h"
+#include "svg/stringstream.h"
+#include "svg/svg.h"
+#include "ui/icon-names.h"
+#include "ui/widget/random.h"
+#include "ui/widget/registered-widget.h"
+
+#define noLPERANDOMPARAM_DEBUG
+
+/* RNG stolen from /display/nr-filter-turbulence.cpp */
+#define RAND_m 2147483647 /* 2**31 - 1 */
+#define RAND_a 16807 /* 7**5; primitive root of m */
+#define RAND_q 127773 /* m / a */
+#define RAND_r 2836 /* m % a */
+#define BSize 0x100
+
+namespace Inkscape {
+
+namespace LivePathEffect {
+
+
+RandomParam::RandomParam( const Glib::ustring& label, const Glib::ustring& tip,
+                      const Glib::ustring& key, Inkscape::UI::Widget::Registry* wr,
+                      Effect* effect, gdouble default_value, long default_seed, bool randomsign)
+    : Parameter(label, tip, key, wr, effect)
+{
+    defvalue = default_value;
+    value = defvalue;
+    min = -Geom::infinity();
+    max = Geom::infinity();
+    integer = false;
+
+    defseed = default_seed;
+    startseed = defseed;
+    seed = startseed;
+    _randomsign = randomsign;
+}
+
+RandomParam::~RandomParam()
+= default;
+
+bool
+RandomParam::param_readSVGValue(const gchar * strvalue)
+{
+    double newval, newstartseed;
+    gchar** stringarray = g_strsplit (strvalue, ";", 2);
+    unsigned int success = sp_svg_number_read_d(stringarray[0], &newval);
+    if (success == 1) {
+        success += sp_svg_number_read_d(stringarray[1], &newstartseed);
+        if (success == 2) {
+            param_set_value(newval, static_cast<long>(newstartseed));
+        } else {
+            param_set_value(newval, defseed);
+        }
+        g_strfreev(stringarray);
+        return true;
+    }
+    g_strfreev(stringarray);
+    return false;
+}
+
+Glib::ustring
+RandomParam::param_getSVGValue() const
+{
+    Inkscape::SVGOStringStream os;
+    os << value << ';' << startseed;
+    return os.str();
+}
+
+Glib::ustring
+RandomParam::param_getDefaultSVGValue() const
+{
+    Inkscape::SVGOStringStream os;
+    os << defvalue << ';' << defseed;
+    return os.str();
+}
+
+void
+RandomParam::param_set_default()
+{
+    param_set_value(defvalue, defseed);
+}
+
+void
+RandomParam::param_update_default(gdouble default_value){
+    defvalue = default_value;
+}
+
+void
+RandomParam::param_update_default(const gchar * default_value){
+    double newval;
+    unsigned int success = sp_svg_number_read_d(default_value, &newval);
+    if (success == 1) {
+        param_update_default(newval);
+    }
+}
+
+void
+RandomParam::param_set_value(gdouble val, long newseed)
+{
+    value = val;
+    if (integer)
+        value = round(value);
+    if (value > max)
+        value = max;
+    if (value < min)
+        value = min;
+
+    startseed = setup_seed(newseed);
+    // we reach maximum value so randomize over to fix duple in next cycle
+    Glib::ustring version = param_effect->lpeversion.param_getSVGValue();
+    if (startseed == RAND_m - 1 && ((
+        effectType() != ROUGH_HATCHES &&
+        effectType() != ROUGHEN) || 
+        version >= "1.2")) 
+    {
+        startseed = rand() * startseed;
+    }
+    seed = startseed;
+}
+
+void
+RandomParam::param_set_range(gdouble min, gdouble max)
+{
+    this->min = min;
+    this->max = max;
+}
+
+void
+RandomParam::param_make_integer(bool yes)
+{
+    integer = yes;
+}
+
+void
+RandomParam::resetRandomizer()
+{
+    seed = startseed;
+}
+
+
+Gtk::Widget *
+RandomParam::param_newWidget()
+{
+    Inkscape::UI::Widget::RegisteredRandom* regrandom = Gtk::manage(
+        new Inkscape::UI::Widget::RegisteredRandom( param_label,
+                                                    param_tooltip,
+                                                    param_key,
+                                                    *param_wr,
+                                                    param_effect->getRepr(),
+                                                    param_effect->getSPDoc() )  );
+
+    regrandom->setValue(value, startseed);
+    if (integer) {
+        regrandom->setDigits(0);
+        regrandom->setIncrements(1, 10);
+    }
+    regrandom->setRange(min, max);
+    regrandom->setProgrammatically = false;
+    regrandom->signal_button_release_event().connect(sigc::mem_fun (*this, &RandomParam::on_button_release));
+
+    regrandom->set_undo_parameters(_("Change random parameter"), INKSCAPE_ICON("dialog-path-effects"));
+
+    return dynamic_cast<Gtk::Widget *> (regrandom);
+}
+
+bool RandomParam::on_button_release(GdkEventButton* button_event) {
+    param_effect->refresh_widgets = true;
+    return false;
+}
+
+RandomParam::operator gdouble()
+{
+    if (_randomsign) {
+        return (rand() * value) - (rand() * value);
+    } else {
+        return rand() * value;
+    }
+};
+
+
+long
+RandomParam::setup_seed(long lSeed)
+{
+  if (lSeed <= 0) lSeed = -(lSeed % (RAND_m - 1)) + 1;
+  if (lSeed > RAND_m - 1) lSeed = RAND_m - 1;
+  return lSeed;
+}
+
+// generates random number between 0 and 1
+gdouble
+RandomParam::rand()
+{
+  long result;
+  result = RAND_a * (seed % RAND_q) - RAND_r * (seed / RAND_q);
+  if (result <= 0) result += RAND_m;
+  seed = result;
+
+  gdouble dresult = (gdouble)(result % BSize) / BSize;
+  return dresult;
+}
+
+
+} /* namespace LivePathEffect */
+} /* 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 :