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-rw-r--r--src/object/sp-mask.cpp318
1 files changed, 318 insertions, 0 deletions
diff --git a/src/object/sp-mask.cpp b/src/object/sp-mask.cpp
new file mode 100644
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--- /dev/null
+++ b/src/object/sp-mask.cpp
@@ -0,0 +1,318 @@
+// 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"
+
+SPMask::SPMask()
+{
+ maskUnits_set = false;
+ maskUnits = SP_CONTENT_UNITS_OBJECTBOUNDINGBOX;
+
+ maskContentUnits_set = false;
+ maskContentUnits = SP_CONTENT_UNITS_USERSPACEONUSE;
+}
+
+SPMask::~SPMask() = default;
+
+void SPMask::build(SPDocument *doc, Inkscape::XML::Node *repr)
+{
+ SPObjectGroup::build(doc, repr);
+
+ readAttr(SPAttr::MASKUNITS);
+ readAttr(SPAttr::MASKCONTENTUNITS);
+ readAttr(SPAttr::STYLE);
+
+ doc->addResource("mask", this);
+}
+
+void SPMask::release()
+{
+ if (document) {
+ document->removeResource("mask", this);
+ }
+
+ views.clear();
+
+ SPObjectGroup::release();
+}
+
+void SPMask::set(SPAttr key, char const *value)
+{
+ switch (key) {
+ case SPAttr::MASKUNITS:
+ maskUnits = SP_CONTENT_UNITS_OBJECTBOUNDINGBOX;
+ maskUnits_set = false;
+
+ if (value) {
+ if (!std::strcmp(value, "userSpaceOnUse")) {
+ maskUnits = SP_CONTENT_UNITS_USERSPACEONUSE;
+ maskUnits_set = true;
+ } else if (!std::strcmp(value, "objectBoundingBox")) {
+ maskUnits_set = true;
+ }
+ }
+
+ requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+ break;
+
+ case SPAttr::MASKCONTENTUNITS:
+ maskContentUnits = SP_CONTENT_UNITS_USERSPACEONUSE;
+ maskContentUnits_set = false;
+
+ if (value) {
+ if (!std::strcmp(value, "userSpaceOnUse")) {
+ maskContentUnits_set = true;
+ } else if (!std::strcmp(value, "objectBoundingBox")) {
+ maskContentUnits = SP_CONTENT_UNITS_OBJECTBOUNDINGBOX;
+ maskContentUnits_set = true;
+ }
+ }
+
+ requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+ break;
+
+ default:
+ SPObjectGroup::set(key, value);
+ break;
+ }
+}
+
+Geom::OptRect SPMask::geometricBounds(Geom::Affine const &transform) const
+{
+ Geom::OptRect bbox;
+
+ for (auto &c : children) {
+ if (auto item = cast<SPItem>(&c)) {
+ bbox.unionWith(item->geometricBounds(item->transform * transform));
+ }
+ }
+
+ return bbox;
+}
+
+Geom::OptRect SPMask::visualBounds(Geom::Affine const &transform) const
+{
+ Geom::OptRect bbox;
+
+ for (auto &c : children) {
+ if (auto item = cast<SPItem>(&c)) {
+ bbox.unionWith(item->visualBounds(item->transform * transform));
+ }
+ }
+
+ return bbox;
+}
+
+void SPMask::child_added(Inkscape::XML::Node *child, Inkscape::XML::Node *ref)
+{
+ SPObjectGroup::child_added(child, ref);
+
+ if (auto item = cast<SPItem>(document->getObjectByRepr(child))) {
+ for (auto &v : views) {
+ auto ac = item->invoke_show(v.drawingitem->drawing(), v.key, SP_ITEM_REFERENCE_FLAGS);
+ if (ac) {
+ // Fixme: Must take position into account.
+ v.drawingitem->prependChild(ac);
+ }
+ }
+ }
+}
+
+void SPMask::update(SPCtx *ctx, unsigned flags)
+{
+ auto const cflags = cascade_flags(flags);
+
+ for (auto child : childList(true)) {
+ if (cflags || (child->uflags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_CHILD_MODIFIED_FLAG))) {
+ child->updateDisplay(ctx, cflags);
+ }
+ sp_object_unref(child);
+ }
+
+ for (auto &v : views) {
+ update_view(v);
+ }
+}
+
+void SPMask::update_view(View &v)
+{
+ if (maskContentUnits == SP_CONTENT_UNITS_OBJECTBOUNDINGBOX && v.bbox) {
+ v.drawingitem->setChildTransform(Geom::Scale(v.bbox->dimensions()) * Geom::Translate(v.bbox->min()));
+ } else {
+ v.drawingitem->setChildTransform(Geom::identity());
+ }
+}
+
+void SPMask::modified(unsigned flags)
+{
+ auto const cflags = cascade_flags(flags);
+
+ for (auto child : childList(true)) {
+ if (cflags || (child->mflags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_CHILD_MODIFIED_FLAG))) {
+ child->emitModified(cflags);
+ }
+ sp_object_unref(child);
+ }
+}
+
+Inkscape::XML::Node *SPMask::write(Inkscape::XML::Document *xml_doc, Inkscape::XML::Node *repr, unsigned 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>
+char const *SPMask::create(std::vector<Inkscape::XML::Node*> &reprs, SPDocument *document)
+{
+ auto defsrepr = document->getDefs()->getRepr();
+
+ auto xml_doc = document->getReprDoc();
+ auto repr = xml_doc->createElement("svg:mask");
+ repr->setAttribute("maskUnits", "userSpaceOnUse");
+
+ defsrepr->appendChild(repr);
+ char const *mask_id = repr->attribute("id");
+ auto 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::show(Inkscape::Drawing &drawing, unsigned key, Geom::OptRect const &bbox)
+{
+ views.emplace_back(make_drawingitem<Inkscape::DrawingGroup>(drawing), bbox, key);
+ auto &v = views.back();
+ auto root = v.drawingitem.get();
+
+ for (auto &child : children) {
+ if (auto item = cast<SPItem>(&child)) {
+ auto ac = item->invoke_show(drawing, key, SP_ITEM_REFERENCE_FLAGS);
+ if (ac) {
+ root->appendChild(ac);
+ }
+ }
+ }
+
+ update_view(v);
+
+ return root;
+}
+
+void SPMask::hide(unsigned key)
+{
+ for (auto &child : children) {
+ if (auto item = cast<SPItem>(&child)) {
+ item->invoke_hide(key);
+ }
+ }
+
+ auto it = std::find_if(views.begin(), views.end(), [=] (auto &v) {
+ return v.key == key;
+ });
+ assert(it != views.end());
+
+ views.erase(it);
+}
+
+void SPMask::setBBox(unsigned key, Geom::OptRect const &bbox)
+{
+ auto it = std::find_if(views.begin(), views.end(), [=] (auto &v) {
+ return v.key == key;
+ });
+ assert(it != views.end());
+ auto &v = *it;
+
+ v.bbox = bbox;
+ update_view(v);
+}
+
+SPMask::View::View(DrawingItemPtr<Inkscape::DrawingGroup> drawingitem, Geom::OptRect const &bbox, unsigned key)
+ : drawingitem(std::move(drawingitem))
+ , bbox(bbox)
+ , key(key) {}
+
+bool SPMaskReference::_acceptObject(SPObject *obj) const
+{
+ if (!is<SPMask>(obj)) {
+ return false;
+ }
+
+ if (URIReference::_acceptObject(obj)) {
+ return true;
+ }
+
+ auto const owner = getOwner();
+ //XML Tree being used directly here while it shouldn't be...
+ auto const owner_repr = owner->getRepr();
+ //XML Tree being used directly here while it shouldn't be...
+ auto const obj_repr = obj->getRepr();
+ char const *owner_name = "";
+ char const *owner_mask = "";
+ char const *obj_name = "";
+ char const *obj_id = "";
+ if (owner_repr) {
+ owner_name = owner_repr->name();
+ owner_mask = owner_repr->attribute("mask");
+ }
+ if (obj_repr) {
+ obj_name = obj_repr->name();
+ obj_id = obj_repr->attribute("id");
+ }
+ std::printf("WARNING: Ignoring recursive mask reference "
+ "<%s mask=\"%s\"> in <%s id=\"%s\">",
+ owner_name, owner_mask,
+ obj_name, obj_id);
+
+ return 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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