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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* A widget for controlling object compositing (filter, opacity, etc.)
*
* Authors:
* Bryce W. Harrington <bryce@bryceharrington.org>
* Gustav Broberg <broberg@kth.se>
* Niko Kiirala <niko@kiirala.com>
* Abhishek Sharma
*
* Copyright (C) 2004--2008 Authors
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#include "object-composite-settings.h"
#include <utility>
#include "desktop.h"
#include "desktop-style.h"
#include "document.h"
#include "document-undo.h"
#include "filter-chemistry.h"
#include "inkscape.h"
#include "style.h"
#include "object/filters/blend.h"
#include "svg/css-ostringstream.h"
#include "ui/widget/style-subject.h"
constexpr double BLUR_MULTIPLIER = 4.0;
namespace Inkscape {
namespace UI {
namespace Widget {
ObjectCompositeSettings::ObjectCompositeSettings(Glib::ustring icon_name, char const *history_prefix, int flags)
: Gtk::Box(Gtk::ORIENTATION_VERTICAL),
_icon_name(std::move(icon_name)),
_blend_tag(Glib::ustring(history_prefix) + ":blend"),
_blur_tag(Glib::ustring(history_prefix) + ":blur"),
_opacity_tag(Glib::ustring(history_prefix) + ":opacity"),
_isolation_tag(Glib::ustring(history_prefix) + ":isolation"),
_filter_modifier(flags),
_blocked(false)
{
set_name( "ObjectCompositeSettings");
// Filter Effects
pack_start(_filter_modifier, false, false, 2);
_filter_modifier.signal_blend_changed().connect(sigc::mem_fun(*this, &ObjectCompositeSettings::_blendBlurValueChanged));
_filter_modifier.signal_blur_changed().connect(sigc::mem_fun(*this, &ObjectCompositeSettings::_blendBlurValueChanged));
_filter_modifier.signal_opacity_changed().connect(sigc::mem_fun(*this, &ObjectCompositeSettings::_opacityValueChanged));
_filter_modifier.signal_isolation_changed().connect(
sigc::mem_fun(*this, &ObjectCompositeSettings::_isolationValueChanged));
show_all_children();
}
ObjectCompositeSettings::~ObjectCompositeSettings() {
setSubject(nullptr);
}
void ObjectCompositeSettings::setSubject(StyleSubject *subject) {
_subject_changed.disconnect();
if (subject) {
_subject = subject;
_subject_changed = _subject->connectChanged(sigc::mem_fun(*this, &ObjectCompositeSettings::_subjectChanged));
}
}
// We get away with sharing one callback for blend and blur as this is used by
// * the Layers dialog where only one layer can be selected at a time,
// * the Fill and Stroke dialog where only blur is used.
// If both blend and blur are used in a dialog where more than one object can
// be selected then this should be split into separate functions for blend and
// blur (like in the Objects dialog).
void
ObjectCompositeSettings::_blendBlurValueChanged()
{
if (!_subject) {
return;
}
SPDesktop *desktop = _subject->getDesktop();
if (!desktop) {
return;
}
SPDocument *document = desktop->getDocument();
if (_blocked)
return;
_blocked = true;
Geom::OptRect bbox = _subject->getBounds(SPItem::GEOMETRIC_BBOX);
double radius;
if (bbox) {
double perimeter = bbox->dimensions()[Geom::X] + bbox->dimensions()[Geom::Y]; // fixme: this is only half the perimeter, is that correct?
double blur_value = _filter_modifier.get_blur_value() / 100.0;
radius = blur_value * blur_value * perimeter / BLUR_MULTIPLIER;
} else {
radius = 0;
}
//apply created filter to every selected item
std::vector<SPObject*> sel = _subject->list();
for (auto i : sel) {
if (!SP_IS_ITEM(i)) {
continue;
}
SPItem * item = SP_ITEM(i);
SPStyle *style = item->style;
g_assert(style != nullptr);
bool change_blend = (item->style->mix_blend_mode.set ? item->style->mix_blend_mode.value : SP_CSS_BLEND_NORMAL) != _filter_modifier.get_blend_mode();
// < 1.0 filter based blend removal
if (!item->style->mix_blend_mode.set && item->style->filter.set && item->style->getFilter()) {
remove_filter_legacy_blend(item);
}
item->style->mix_blend_mode.set = TRUE;
if (item->style->isolation.value == SP_CSS_ISOLATION_ISOLATE) {
item->style->mix_blend_mode.value = SP_CSS_BLEND_NORMAL;
} else {
item->style->mix_blend_mode.value = _filter_modifier.get_blend_mode();
}
if (radius == 0 && item->style->filter.set && item->style->getFilter()
&& filter_is_single_gaussian_blur(item->style->getFilter())) {
remove_filter(item, false);
} else if (radius != 0) {
SPFilter *filter = modify_filter_gaussian_blur_from_item(document, item, radius);
filter->update_filter_region(item);
sp_style_set_property_url(item, "filter", filter, false);
}
if (change_blend) { //we do blend so we need update display style
item->updateRepr(SP_OBJECT_WRITE_NO_CHILDREN | SP_OBJECT_WRITE_EXT);
} else {
item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
}
}
DocumentUndo::maybeDone(document, _blur_tag.c_str(), _("Change blur/blend filter"), _icon_name);
_blocked = false;
}
void
ObjectCompositeSettings::_opacityValueChanged()
{
if (!_subject) {
return;
}
SPDesktop *desktop = _subject->getDesktop();
if (!desktop) {
return;
}
if (_blocked)
return;
_blocked = true;
SPCSSAttr *css = sp_repr_css_attr_new ();
Inkscape::CSSOStringStream os;
os << CLAMP (_filter_modifier.get_opacity_value() / 100, 0.0, 1.0);
sp_repr_css_set_property (css, "opacity", os.str().c_str());
_subject->setCSS(css);
sp_repr_css_attr_unref (css);
DocumentUndo::maybeDone(desktop->getDocument(), _opacity_tag.c_str(), _("Change opacity"), _icon_name);
_blocked = false;
}
void ObjectCompositeSettings::_isolationValueChanged()
{
if (!_subject) {
return;
}
SPDesktop *desktop = _subject->getDesktop();
if (!desktop) {
return;
}
if (_blocked)
return;
_blocked = true;
for (auto item : _subject->list()) {
item->style->isolation.set = TRUE;
item->style->isolation.value = _filter_modifier.get_isolation_mode();
if (item->style->isolation.value == SP_CSS_ISOLATION_ISOLATE) {
item->style->mix_blend_mode.set = TRUE;
item->style->mix_blend_mode.value = SP_CSS_BLEND_NORMAL;
}
item->updateRepr(SP_OBJECT_WRITE_NO_CHILDREN | SP_OBJECT_WRITE_EXT);
}
DocumentUndo::maybeDone(desktop->getDocument(), _isolation_tag.c_str(), _("Change isolation"), _icon_name);
_blocked = false;
}
void
ObjectCompositeSettings::_subjectChanged() {
if (!_subject) {
return;
}
SPDesktop *desktop = _subject->getDesktop();
if (!desktop) {
return;
}
if (_blocked)
return;
_blocked = true;
SPStyle query(desktop->getDocument());
int result = _subject->queryStyle(&query, QUERY_STYLE_PROPERTY_MASTEROPACITY);
switch (result) {
case QUERY_STYLE_NOTHING:
break;
case QUERY_STYLE_SINGLE:
case QUERY_STYLE_MULTIPLE_AVERAGED: // TODO: treat this slightly differently
case QUERY_STYLE_MULTIPLE_SAME:
_filter_modifier.set_opacity_value(100 * SP_SCALE24_TO_FLOAT(query.opacity.value));
break;
}
//query now for current filter mode and average blurring of selection
const int isolation_result = _subject->queryStyle(&query, QUERY_STYLE_PROPERTY_ISOLATION);
switch (isolation_result) {
case QUERY_STYLE_NOTHING:
_filter_modifier.set_isolation_mode(SP_CSS_ISOLATION_AUTO, false);
break;
case QUERY_STYLE_SINGLE:
case QUERY_STYLE_MULTIPLE_SAME:
_filter_modifier.set_isolation_mode(query.isolation.value, true); // here dont work mix_blend_mode.set
break;
case QUERY_STYLE_MULTIPLE_DIFFERENT:
_filter_modifier.set_isolation_mode(SP_CSS_ISOLATION_AUTO, false);
// TODO: set text
break;
}
// query now for current filter mode and average blurring of selection
const int blend_result = _subject->queryStyle(&query, QUERY_STYLE_PROPERTY_BLEND);
switch(blend_result) {
case QUERY_STYLE_NOTHING:
_filter_modifier.set_blend_mode(SP_CSS_BLEND_NORMAL, false);
break;
case QUERY_STYLE_SINGLE:
case QUERY_STYLE_MULTIPLE_SAME:
_filter_modifier.set_blend_mode(query.mix_blend_mode.value, true); // here dont work mix_blend_mode.set
break;
case QUERY_STYLE_MULTIPLE_DIFFERENT:
_filter_modifier.set_blend_mode(SP_CSS_BLEND_NORMAL, false);
break;
}
int blur_result = _subject->queryStyle(&query, QUERY_STYLE_PROPERTY_BLUR);
switch (blur_result) {
case QUERY_STYLE_NOTHING: // no blurring
_filter_modifier.set_blur_value(0);
break;
case QUERY_STYLE_SINGLE:
case QUERY_STYLE_MULTIPLE_AVERAGED:
case QUERY_STYLE_MULTIPLE_SAME:
Geom::OptRect bbox = _subject->getBounds(SPItem::GEOMETRIC_BBOX);
if (bbox) {
double perimeter =
bbox->dimensions()[Geom::X] +
bbox->dimensions()[Geom::Y]; // fixme: this is only half the perimeter, is that correct?
// update blur widget value
float radius = query.filter_gaussianBlur_deviation.value;
float percent = std::sqrt(radius * BLUR_MULTIPLIER / perimeter) * 100;
_filter_modifier.set_blur_value(percent);
}
break;
}
// If we have nothing selected, disable dialog.
if (result == QUERY_STYLE_NOTHING &&
blend_result == QUERY_STYLE_NOTHING ) {
_filter_modifier.set_sensitive( false );
} else {
_filter_modifier.set_sensitive( true );
}
_blocked = false;
}
}
}
}
/*
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 :
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