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-rw-r--r--src/object/sp-mask.cpp337
1 files changed, 337 insertions, 0 deletions
diff --git a/src/object/sp-mask.cpp b/src/object/sp-mask.cpp
new file mode 100644
index 0000000..9c99776
--- /dev/null
+++ b/src/object/sp-mask.cpp
@@ -0,0 +1,337 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * SVG <mask> implementation
+ *
+ * Authors:
+ * Lauris Kaplinski <lauris@kaplinski.com>
+ * Jon A. Cruz <jon@joncruz.org>
+ * Abhishek Sharma
+ *
+ * Copyright (C) 2003 authors
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include <cstring>
+#include <string>
+#include <2geom/transforms.h>
+
+#include "display/drawing.h"
+#include "display/drawing-group.h"
+#include "xml/repr.h"
+
+#include "enums.h"
+#include "attributes.h"
+#include "document.h"
+#include "style.h"
+#include "attributes.h"
+
+#include "sp-defs.h"
+#include "sp-item.h"
+#include "sp-mask.h"
+
+SPMaskView *sp_mask_view_new_prepend (SPMaskView *list, unsigned int key, Inkscape::DrawingItem *arenaitem);
+SPMaskView *sp_mask_view_list_remove (SPMaskView *list, SPMaskView *view);
+
+SPMask::SPMask() : SPObjectGroup() {
+ this->maskUnits_set = FALSE;
+ this->maskUnits = SP_CONTENT_UNITS_OBJECTBOUNDINGBOX;
+
+ this->maskContentUnits_set = FALSE;
+ this->maskContentUnits = SP_CONTENT_UNITS_USERSPACEONUSE;
+
+ this->display = nullptr;
+}
+
+SPMask::~SPMask() = default;
+
+void SPMask::build(SPDocument* doc, Inkscape::XML::Node* repr) {
+ SPObjectGroup::build(doc, repr);
+
+ this->readAttr(SPAttr::MASKUNITS);
+ this->readAttr(SPAttr::MASKCONTENTUNITS);
+ this->readAttr(SPAttr::STYLE);
+
+ /* Register ourselves */
+ doc->addResource("mask", this);
+}
+
+void SPMask::release() {
+ if (this->document) {
+ // Unregister ourselves
+ this->document->removeResource("mask", this);
+ }
+
+ while (this->display) {
+ // We simply unref and let item manage this in handler
+ this->display = sp_mask_view_list_remove(this->display, this->display);
+ }
+
+ SPObjectGroup::release();
+}
+
+void SPMask::set(SPAttr key, const gchar* value) {
+ switch (key) {
+ case SPAttr::MASKUNITS:
+ this->maskUnits = SP_CONTENT_UNITS_OBJECTBOUNDINGBOX;
+ this->maskUnits_set = FALSE;
+
+ if (value) {
+ if (!strcmp (value, "userSpaceOnUse")) {
+ this->maskUnits = SP_CONTENT_UNITS_USERSPACEONUSE;
+ this->maskUnits_set = TRUE;
+ } else if (!strcmp (value, "objectBoundingBox")) {
+ this->maskUnits_set = TRUE;
+ }
+ }
+
+ this->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+ break;
+ case SPAttr::MASKCONTENTUNITS:
+ this->maskContentUnits = SP_CONTENT_UNITS_USERSPACEONUSE;
+ this->maskContentUnits_set = FALSE;
+
+ if (value) {
+ if (!strcmp (value, "userSpaceOnUse")) {
+ this->maskContentUnits_set = TRUE;
+ } else if (!strcmp (value, "objectBoundingBox")) {
+ this->maskContentUnits = SP_CONTENT_UNITS_OBJECTBOUNDINGBOX;
+ this->maskContentUnits_set = TRUE;
+ }
+ }
+
+ this->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+ break;
+ default:
+ SPObjectGroup::set(key, value);
+ break;
+ }
+}
+
+Geom::OptRect
+SPMask::geometricBounds(Geom::Affine const &transform) {
+ Geom::OptRect bbox;
+
+ for (auto& i: children) {
+ if (SP_IS_ITEM(&i)) {
+ Geom::OptRect tmp = SP_ITEM(&i)->geometricBounds(Geom::Affine(SP_ITEM(&i)->transform) * transform);
+ bbox.unionWith(tmp);
+ }
+ }
+
+ return bbox;
+}
+
+Geom::OptRect
+SPMask::visualBounds(Geom::Affine const &transform) {
+ Geom::OptRect bbox;
+ for (auto& i: children) {
+ if (SP_IS_ITEM(&i)) {
+ Geom::OptRect tmp = SP_ITEM(&i)->visualBounds(SP_ITEM(&i)->transform * transform);
+ bbox.unionWith(tmp);
+ }
+ }
+
+ return bbox;
+}
+
+void SPMask::child_added(Inkscape::XML::Node* child, Inkscape::XML::Node* ref) {
+ /* Invoke SPObjectGroup implementation */
+ SPObjectGroup::child_added(child, ref);
+
+ /* Show new object */
+ SPObject *ochild = this->document->getObjectByRepr(child);
+
+ if (SP_IS_ITEM (ochild)) {
+ for (SPMaskView *v = this->display; v != nullptr; v = v->next) {
+ Inkscape::DrawingItem *ac = SP_ITEM (ochild)->invoke_show(v->arenaitem->drawing(), v->key, SP_ITEM_REFERENCE_FLAGS);
+
+ if (ac) {
+ // @fixme must take position into account
+ v->arenaitem->prependChild(ac);
+ }
+ }
+ }
+}
+
+
+void SPMask::update(SPCtx* ctx, unsigned int flags) {
+ if (flags & SP_OBJECT_MODIFIED_FLAG) {
+ flags |= SP_OBJECT_PARENT_MODIFIED_FLAG;
+ }
+
+ flags &= SP_OBJECT_MODIFIED_CASCADE;
+
+ std::vector<SPObject *> children = this->childList(true);
+
+ for (auto child : children) {
+ if (flags || (child->uflags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_CHILD_MODIFIED_FLAG))) {
+ child->updateDisplay(ctx, flags);
+ }
+
+ sp_object_unref(child);
+ }
+
+ for (SPMaskView *v = this->display; v != nullptr; v = v->next) {
+ Inkscape::DrawingGroup *g = dynamic_cast<Inkscape::DrawingGroup *>(v->arenaitem);
+
+ if (this->maskContentUnits == SP_CONTENT_UNITS_OBJECTBOUNDINGBOX && v->bbox) {
+ Geom::Affine t = Geom::Scale(v->bbox->dimensions());
+ t.setTranslation(v->bbox->min());
+ g->setChildTransform(t);
+ } else {
+ g->setChildTransform(Geom::identity());
+ }
+ }
+}
+
+void SPMask::modified(unsigned int flags) {
+ if (flags & SP_OBJECT_MODIFIED_FLAG) {
+ flags |= SP_OBJECT_PARENT_MODIFIED_FLAG;
+ }
+
+ flags &= SP_OBJECT_MODIFIED_CASCADE;
+
+ std::vector<SPObject *> children = this->childList(true);
+
+ for (auto child : children) {
+ if (flags || (child->mflags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_CHILD_MODIFIED_FLAG))) {
+ child->emitModified(flags);
+ }
+
+ sp_object_unref(child);
+ }
+}
+
+Inkscape::XML::Node* SPMask::write(Inkscape::XML::Document* xml_doc, Inkscape::XML::Node* repr, guint flags) {
+ if ((flags & SP_OBJECT_WRITE_BUILD) && !repr) {
+ repr = xml_doc->createElement("svg:mask");
+ }
+
+ SPObjectGroup::write(xml_doc, repr, flags);
+
+ return repr;
+}
+
+// Create a mask element (using passed elements), add it to <defs>
+const gchar *
+sp_mask_create (std::vector<Inkscape::XML::Node*> &reprs, SPDocument *document)
+{
+ Inkscape::XML::Node *defsrepr = document->getDefs()->getRepr();
+
+ Inkscape::XML::Document *xml_doc = document->getReprDoc();
+ Inkscape::XML::Node *repr = xml_doc->createElement("svg:mask");
+ repr->setAttribute("maskUnits", "userSpaceOnUse");
+
+ defsrepr->appendChild(repr);
+ const gchar *mask_id = repr->attribute("id");
+ SPObject *mask_object = document->getObjectById(mask_id);
+
+ for (auto node : reprs) {
+ mask_object->appendChildRepr(node);
+ }
+
+ if (repr != defsrepr->lastChild())
+ defsrepr->changeOrder(repr, defsrepr->lastChild()); // workaround for bug 989084
+
+ Inkscape::GC::release(repr);
+ return mask_id;
+}
+
+Inkscape::DrawingItem *SPMask::sp_mask_show(Inkscape::Drawing &drawing, unsigned int key) {
+ g_return_val_if_fail (SP_IS_MASK (this), NULL);
+
+ Inkscape::DrawingGroup *ai = new Inkscape::DrawingGroup(drawing);
+ this->display = sp_mask_view_new_prepend (this->display, key, ai);
+
+ for (auto& child: children) {
+ if (SP_IS_ITEM (&child)) {
+ Inkscape::DrawingItem *ac = SP_ITEM (&child)->invoke_show (drawing, key, SP_ITEM_REFERENCE_FLAGS);
+
+ if (ac) {
+ ai->appendChild(ac);
+ }
+ }
+ }
+
+ if (this->maskContentUnits == SP_CONTENT_UNITS_OBJECTBOUNDINGBOX && this->display->bbox) {
+ Geom::Affine t = Geom::Scale(this->display->bbox->dimensions());
+ t.setTranslation(this->display->bbox->min());
+ ai->setChildTransform(t);
+ }
+
+ return ai;
+}
+
+void SPMask::sp_mask_hide(unsigned int key) {
+ g_return_if_fail (SP_IS_MASK (this));
+
+ for (auto& child: children) {
+ if (SP_IS_ITEM (&child)) {
+ SP_ITEM(&child)->invoke_hide (key);
+ }
+ }
+
+ for (SPMaskView *v = this->display; v != nullptr; v = v->next) {
+ if (v->key == key) {
+ /* We simply unref and let item to manage this in handler */
+ this->display = sp_mask_view_list_remove (this->display, v);
+ return;
+ }
+ }
+
+ g_assert_not_reached ();
+}
+
+void SPMask::sp_mask_set_bbox(unsigned int key, Geom::OptRect const &bbox) {
+ for (SPMaskView *v = this->display; v != nullptr; v = v->next) {
+ if (v->key == key) {
+ v->bbox = bbox;
+ break;
+ }
+ }
+}
+
+/* Mask views */
+
+SPMaskView *
+sp_mask_view_new_prepend (SPMaskView *list, unsigned int key, Inkscape::DrawingItem *arenaitem)
+{
+ SPMaskView *new_mask_view = g_new (SPMaskView, 1);
+
+ new_mask_view->next = list;
+ new_mask_view->key = key;
+ new_mask_view->arenaitem = arenaitem;
+ new_mask_view->bbox = Geom::OptRect();
+
+ return new_mask_view;
+}
+
+SPMaskView *
+sp_mask_view_list_remove (SPMaskView *list, SPMaskView *view)
+{
+ if (view == list) {
+ list = list->next;
+ } else {
+ SPMaskView *prev;
+ prev = list;
+ while (prev->next != view) prev = prev->next;
+ prev->next = view->next;
+ }
+
+ delete view->arenaitem;
+ g_free (view);
+
+ return list;
+}
+
+/*
+ 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 :