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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:24:48 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:24:48 +0000
commitcca66b9ec4e494c1d919bff0f71a820d8afab1fa (patch)
tree146f39ded1c938019e1ed42d30923c2ac9e86789 /src/object/sp-hatch.cpp
parentInitial commit. (diff)
downloadinkscape-upstream.tar.xz
inkscape-upstream.zip
Adding upstream version 1.2.2.upstream/1.2.2upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/object/sp-hatch.cpp')
-rw-r--r--src/object/sp-hatch.cpp807
1 files changed, 807 insertions, 0 deletions
diff --git a/src/object/sp-hatch.cpp b/src/object/sp-hatch.cpp
new file mode 100644
index 0000000..e8f2706
--- /dev/null
+++ b/src/object/sp-hatch.cpp
@@ -0,0 +1,807 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/**
+ * @file
+ * SVG <hatch> implementation
+ */
+/*
+ * Authors:
+ * Tomasz Boczkowski <penginsbacon@gmail.com>
+ * Jon A. Cruz <jon@joncruz.org>
+ *
+ * Copyright (C) 2014 Tomasz Boczkowski
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include "sp-hatch.h"
+
+#include <cstring>
+#include <string>
+
+#include <2geom/transforms.h>
+#include <sigc++/functors/mem_fun.h>
+
+#include "attributes.h"
+#include "bad-uri-exception.h"
+#include "document.h"
+
+#include "display/cairo-utils.h"
+#include "display/drawing-context.h"
+#include "display/drawing-surface.h"
+#include "display/drawing.h"
+#include "display/drawing-pattern.h"
+
+#include "sp-defs.h"
+#include "sp-hatch-path.h"
+#include "sp-item.h"
+
+#include "svg/svg.h"
+
+SPHatch::SPHatch()
+ : SPPaintServer(),
+ href(),
+ ref(nullptr), // avoiding 'this' in initializer list
+ _hatchUnits(UNITS_OBJECTBOUNDINGBOX),
+ _hatchUnits_set(false),
+ _hatchContentUnits(UNITS_USERSPACEONUSE),
+ _hatchContentUnits_set(false),
+ _hatchTransform(Geom::identity()),
+ _hatchTransform_set(false),
+ _x(),
+ _y(),
+ _pitch(),
+ _rotate(),
+ _modified_connection(),
+ _display()
+{
+ ref = new SPHatchReference(this);
+ ref->changedSignal().connect(sigc::mem_fun(this, &SPHatch::_onRefChanged));
+
+ // TODO check that these should start already as unset:
+ _x.unset();
+ _y.unset();
+ _pitch.unset();
+ _rotate.unset();
+}
+
+SPHatch::~SPHatch() = default;
+
+void SPHatch::build(SPDocument* doc, Inkscape::XML::Node* repr)
+{
+ SPPaintServer::build(doc, repr);
+
+ readAttr(SPAttr::HATCHUNITS);
+ readAttr(SPAttr::HATCHCONTENTUNITS);
+ readAttr(SPAttr::HATCHTRANSFORM);
+ readAttr(SPAttr::X);
+ readAttr(SPAttr::Y);
+ readAttr(SPAttr::PITCH);
+ readAttr(SPAttr::ROTATE);
+ readAttr(SPAttr::XLINK_HREF);
+ readAttr(SPAttr::STYLE);
+
+ // Register ourselves
+ doc->addResource("hatch", this);
+}
+
+void SPHatch::release()
+{
+ if (document) {
+ // Unregister ourselves
+ document->removeResource("hatch", this);
+ }
+
+ std::vector<SPHatchPath *> children(hatchPaths());
+ for (auto & view_iter : _display) {
+ for (auto child : children) {
+ child->hide(view_iter.key);
+ }
+ delete view_iter.arenaitem;
+ view_iter.arenaitem = nullptr;
+ }
+
+ if (ref) {
+ _modified_connection.disconnect();
+ ref->detach();
+ delete ref;
+ ref = nullptr;
+ }
+
+ SPPaintServer::release();
+}
+
+void SPHatch::child_added(Inkscape::XML::Node* child, Inkscape::XML::Node* ref)
+{
+ SPObject::child_added(child, ref);
+
+ SPHatchPath *path_child = dynamic_cast<SPHatchPath *>(document->getObjectByRepr(child));
+
+ if (path_child) {
+ for (auto & iter : _display) {
+ Geom::OptInterval extents = _calculateStripExtents(iter.bbox);
+ Inkscape::DrawingItem *ac = path_child->show(iter.arenaitem->drawing(), iter.key, extents);
+
+ path_child->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+ if (ac) {
+ iter.arenaitem->prependChild(ac);
+ }
+ }
+ }
+ //FIXME: notify all hatches that refer to this child set
+}
+
+void SPHatch::set(SPAttr key, const gchar* value)
+{
+ switch (key) {
+ case SPAttr::HATCHUNITS:
+ if (value) {
+ if (!strcmp(value, "userSpaceOnUse")) {
+ _hatchUnits = UNITS_USERSPACEONUSE;
+ } else {
+ _hatchUnits = UNITS_OBJECTBOUNDINGBOX;
+ }
+
+ _hatchUnits_set = true;
+ } else {
+ _hatchUnits_set = false;
+ }
+
+ requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+ break;
+
+ case SPAttr::HATCHCONTENTUNITS:
+ if (value) {
+ if (!strcmp(value, "userSpaceOnUse")) {
+ _hatchContentUnits = UNITS_USERSPACEONUSE;
+ } else {
+ _hatchContentUnits = UNITS_OBJECTBOUNDINGBOX;
+ }
+
+ _hatchContentUnits_set = true;
+ } else {
+ _hatchContentUnits_set = false;
+ }
+
+ requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+ break;
+
+ case SPAttr::HATCHTRANSFORM: {
+ Geom::Affine t;
+
+ if (value && sp_svg_transform_read(value, &t)) {
+ _hatchTransform = t;
+ _hatchTransform_set = true;
+ } else {
+ _hatchTransform = Geom::identity();
+ _hatchTransform_set = false;
+ }
+
+ requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+ break;
+ }
+ case SPAttr::X:
+ _x.readOrUnset(value);
+ requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+ break;
+
+ case SPAttr::Y:
+ _y.readOrUnset(value);
+ requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+ break;
+
+ case SPAttr::PITCH:
+ _pitch.readOrUnset(value);
+ requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+ break;
+
+ case SPAttr::ROTATE:
+ _rotate.readOrUnset(value);
+ requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+ break;
+
+ case SPAttr::XLINK_HREF:
+ if (value && href == value) {
+ // Href unchanged, do nothing.
+ } else {
+ href.clear();
+
+ if (value) {
+ // First, set the href field; it's only used in the "unchanged" check above.
+ href = value;
+ // Now do the attaching, which emits the changed signal.
+ if (value) {
+ try {
+ ref->attach(Inkscape::URI(value));
+ } catch (Inkscape::BadURIException &e) {
+ g_warning("%s", e.what());
+ ref->detach();
+ }
+ } else {
+ ref->detach();
+ }
+ }
+ }
+ requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+ break;
+
+ default:
+ if (SP_ATTRIBUTE_IS_CSS(key)) {
+ style->clear(key);
+ requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
+ } else {
+ SPPaintServer::set(key, value);
+ }
+ break;
+ }
+}
+
+bool SPHatch::_hasHatchPatchChildren(SPHatch const *hatch)
+{
+ for (auto& child: hatch->children) {
+ SPHatchPath const *hatchPath = dynamic_cast<SPHatchPath const *>(&child);
+ if (hatchPath) {
+ return true;
+ }
+ }
+ return false;
+}
+
+std::vector<SPHatchPath*> SPHatch::hatchPaths()
+{
+ std::vector<SPHatchPath*> list;
+ SPHatch *src = chase_hrefs<SPHatch>(this, sigc::ptr_fun(&_hasHatchPatchChildren));
+
+ if (src) {
+ for (auto& child: src->children) {
+ SPHatchPath *hatchPath = dynamic_cast<SPHatchPath *>(&child);
+ if (hatchPath) {
+ list.push_back(hatchPath);
+ }
+ }
+ }
+ return list;
+}
+
+std::vector<SPHatchPath const*> SPHatch::hatchPaths() const
+{
+ std::vector<SPHatchPath const*> list;
+ SPHatch const *src = chase_hrefs<SPHatch const>(this, sigc::ptr_fun(&_hasHatchPatchChildren));
+
+ if (src) {
+ for (auto& child: src->children) {
+ SPHatchPath const *hatchPath = dynamic_cast<SPHatchPath const*>(&child);
+ if (hatchPath) {
+ list.push_back(hatchPath);
+ }
+ }
+ }
+ return list;
+}
+
+// TODO: ::remove_child and ::order_changed handles - see SPPattern
+
+
+void SPHatch::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<SPHatchPath *> children(hatchPaths());
+
+ for (auto child : children) {
+ sp_object_ref(child, nullptr);
+
+ for (auto & view_iter : _display) {
+ Geom::OptInterval strip_extents = _calculateStripExtents(view_iter.bbox);
+ child->setStripExtents(view_iter.key, strip_extents);
+ }
+
+ if (flags || (child->mflags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_CHILD_MODIFIED_FLAG))) {
+
+ child->updateDisplay(ctx, flags);
+ }
+
+ sp_object_unref(child, nullptr);
+ }
+
+ for (auto & iter : _display) {
+ _updateView(iter);
+ }
+}
+
+void SPHatch::modified(unsigned int flags)
+{
+ if (flags & SP_OBJECT_MODIFIED_FLAG) {
+ flags |= SP_OBJECT_PARENT_MODIFIED_FLAG;
+ }
+
+ flags &= SP_OBJECT_MODIFIED_CASCADE;
+
+ std::vector<SPHatchPath *> children(hatchPaths());
+
+ for (auto child : children) {
+ sp_object_ref(child, nullptr);
+
+ if (flags || (child->mflags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_CHILD_MODIFIED_FLAG))) {
+ child->emitModified(flags);
+ }
+
+ sp_object_unref(child, nullptr);
+ }
+}
+
+void SPHatch::_onRefChanged(SPObject *old_ref, SPObject *ref)
+{
+ if (old_ref) {
+ _modified_connection.disconnect();
+ }
+
+ SPHatch *hatch = dynamic_cast<SPHatch *>(ref);
+ if (hatch) {
+ _modified_connection = ref->connectModified(sigc::mem_fun(this, &SPHatch::_onRefModified));
+ }
+
+ if (!_hasHatchPatchChildren(this)) {
+ SPHatch *old_shown = nullptr;
+ SPHatch *new_shown = nullptr;
+ std::vector<SPHatchPath *> oldhatchPaths;
+ std::vector<SPHatchPath *> newhatchPaths;
+
+ SPHatch *old_hatch = dynamic_cast<SPHatch *>(old_ref);
+ if (old_hatch) {
+ old_shown = old_hatch->rootHatch();
+ oldhatchPaths = old_shown->hatchPaths();
+ }
+ if (hatch) {
+ new_shown = hatch->rootHatch();
+ newhatchPaths = new_shown->hatchPaths();
+ }
+ if (old_shown != new_shown) {
+
+ for (auto & iter : _display) {
+ Geom::OptInterval extents = _calculateStripExtents(iter.bbox);
+
+ for (auto child : oldhatchPaths) {
+ child->hide(iter.key);
+ }
+ for (auto child : newhatchPaths) {
+ Inkscape::DrawingItem *cai = child->show(iter.arenaitem->drawing(), iter.key, extents);
+ child->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+ if (cai) {
+ iter.arenaitem->appendChild(cai);
+ }
+
+ }
+ }
+ }
+ }
+
+ _onRefModified(ref, 0);
+}
+
+void SPHatch::_onRefModified(SPObject */*ref*/, guint /*flags*/)
+{
+ requestModified(SP_OBJECT_MODIFIED_FLAG);
+ // Conditional to avoid causing infinite loop if there's a cycle in the href chain.
+}
+
+
+SPHatch *SPHatch::rootHatch()
+{
+ SPHatch *src = chase_hrefs<SPHatch>(this, sigc::ptr_fun(&_hasHatchPatchChildren));
+ return src ? src : this; // document is broken, we can't get to root; but at least we can return pat which is supposedly a valid hatch
+}
+
+// Access functions that look up fields up the chain of referenced hatchs and return the first one which is set
+// FIXME: all of them must use chase_hrefs as children() and rootHatch()
+
+SPHatch::HatchUnits SPHatch::hatchUnits() const
+{
+ HatchUnits units = _hatchUnits;
+ for (SPHatch const *pat_i = this; pat_i; pat_i = (pat_i->ref) ? pat_i->ref->getObject() : nullptr) {
+ if (pat_i->_hatchUnits_set) {
+ units = pat_i->_hatchUnits;
+ break;
+ }
+ }
+ return units;
+}
+
+SPHatch::HatchUnits SPHatch::hatchContentUnits() const
+{
+ HatchUnits units = _hatchContentUnits;
+ for (SPHatch const *pat_i = this; pat_i; pat_i = (pat_i->ref) ? pat_i->ref->getObject() : nullptr) {
+ if (pat_i->_hatchContentUnits_set) {
+ units = pat_i->_hatchContentUnits;
+ break;
+ }
+ }
+ return units;
+}
+
+Geom::Affine const &SPHatch::hatchTransform() const
+{
+ for (SPHatch const *pat_i = this; pat_i; pat_i = (pat_i->ref) ? pat_i->ref->getObject() : nullptr) {
+ if (pat_i->_hatchTransform_set) {
+ return pat_i->_hatchTransform;
+ }
+ }
+ return _hatchTransform;
+}
+
+gdouble SPHatch::x() const
+{
+ gdouble val = 0;
+ for (SPHatch const *pat_i = this; pat_i; pat_i = (pat_i->ref) ? pat_i->ref->getObject() : nullptr) {
+ if (pat_i->_x._set) {
+ val = pat_i->_x.computed;
+ break;
+ }
+ }
+ return val;
+}
+
+gdouble SPHatch::y() const
+{
+ gdouble val = 0;
+ for (SPHatch const *pat_i = this; pat_i; pat_i = (pat_i->ref) ? pat_i->ref->getObject() : nullptr) {
+ if (pat_i->_y._set) {
+ val = pat_i->_y.computed;
+ break;
+ }
+ }
+ return val;
+}
+
+gdouble SPHatch::pitch() const
+{
+ gdouble val = 0;
+ for (SPHatch const *pat_i = this; pat_i; pat_i = (pat_i->ref) ? pat_i->ref->getObject() : nullptr) {
+ if (pat_i->_pitch._set) {
+ val = pat_i->_pitch.computed;
+ break;
+ }
+ }
+ return val;
+}
+
+gdouble SPHatch::rotate() const
+{
+ gdouble val = 0;
+ for (SPHatch const *pat_i = this; pat_i; pat_i = (pat_i->ref) ? pat_i->ref->getObject() : nullptr) {
+ if (pat_i->_rotate._set) {
+ val = pat_i->_rotate.computed;
+ break;
+ }
+ }
+ return val;
+}
+
+guint SPHatch::_countHrefs(SPObject *o) const
+{
+ if (!o)
+ return 1;
+
+ guint i = 0;
+
+ SPStyle *style = o->style;
+ if (style && style->fill.isPaintserver() && SP_IS_HATCH(SP_STYLE_FILL_SERVER(style)) &&
+ SP_HATCH(SP_STYLE_FILL_SERVER(style)) == this) {
+ i++;
+ }
+ if (style && style->stroke.isPaintserver() && SP_IS_HATCH(SP_STYLE_STROKE_SERVER(style)) &&
+ SP_HATCH(SP_STYLE_STROKE_SERVER(style)) == this) {
+ i++;
+ }
+
+ for (auto &child : o->children) {
+ i += _countHrefs(&child);
+ }
+
+ return i;
+}
+
+SPHatch *SPHatch::clone_if_necessary(SPItem *item, const gchar *property)
+{
+ SPHatch *hatch = this;
+ if (hatch->href.empty() || hatch->hrefcount > _countHrefs(item)) {
+ Inkscape::XML::Document *xml_doc = document->getReprDoc();
+ Inkscape::XML::Node *defsrepr = document->getDefs()->getRepr();
+
+ Inkscape::XML::Node *repr = xml_doc->createElement("svg:hatch");
+ repr->setAttribute("inkscape:collect", "always");
+ Glib::ustring parent_ref = Glib::ustring::compose("#%1", getRepr()->attribute("id"));
+ repr->setAttribute("xlink:href", parent_ref);
+
+ defsrepr->addChild(repr, nullptr);
+ const gchar *child_id = repr->attribute("id");
+ SPObject *child = document->getObjectById(child_id);
+ g_assert(SP_IS_HATCH(child));
+
+ hatch = SP_HATCH(child);
+
+ Glib::ustring href = Glib::ustring::compose("url(#%1)", hatch->getRepr()->attribute("id"));
+
+ SPCSSAttr *css = sp_repr_css_attr_new();
+ sp_repr_css_set_property(css, property, href.c_str());
+ sp_repr_css_change_recursive(item->getRepr(), css, "style");
+ }
+
+ return hatch;
+}
+
+void SPHatch::transform_multiply(Geom::Affine postmul, bool set)
+{
+ if (set) {
+ _hatchTransform = postmul;
+ } else {
+ _hatchTransform = hatchTransform() * postmul;
+ }
+
+ _hatchTransform_set = true;
+
+ setAttributeOrRemoveIfEmpty("transform", sp_svg_transform_write(_hatchTransform));
+}
+
+bool SPHatch::isValid() const
+{
+ bool valid = false;
+
+ if (pitch() > 0) {
+ std::vector<SPHatchPath const *> children(hatchPaths());
+ if (!children.empty()) {
+ valid = true;
+ for (ConstChildIterator iter = children.begin(); (iter != children.end()) && valid; ++iter) {
+ SPHatchPath const *child = *iter;
+ valid = child->isValid();
+ }
+ }
+ }
+
+ return valid;
+}
+
+Inkscape::DrawingPattern *SPHatch::show(Inkscape::Drawing &drawing, unsigned int key, Geom::OptRect bbox)
+{
+ Inkscape::DrawingPattern *ai = new Inkscape::DrawingPattern(drawing);
+ //TODO: set some debug flag to see DrawingPattern
+ _display.push_front(View(ai, key));
+ _display.front().bbox = bbox;
+
+ std::vector<SPHatchPath *> children(hatchPaths());
+
+ Geom::OptInterval extents = _calculateStripExtents(bbox);
+ for (auto child : children) {
+ Inkscape::DrawingItem *cai = child->show(drawing, key, extents);
+ if (cai) {
+ ai->appendChild(cai);
+ }
+ }
+
+ View& view = _display.front();
+ _updateView(view);
+
+ return ai;
+}
+
+void SPHatch::hide(unsigned int key)
+{
+ std::vector<SPHatchPath *> children(hatchPaths());
+
+ for (auto child : children) {
+ child->hide(key);
+ }
+
+ for (ViewIterator iter = _display.begin(); iter != _display.end(); ++iter) {
+ if (iter->key == key) {
+ delete iter->arenaitem;
+ _display.erase(iter);
+ return;
+ }
+ }
+
+ g_assert_not_reached();
+}
+
+
+Geom::Interval SPHatch::bounds() const
+{
+ Geom::Interval result;
+ std::vector<SPHatchPath const *> children(hatchPaths());
+
+ for (auto child : children) {
+ if (result.extent() == 0) {
+ result = child->bounds();
+ } else {
+ result |= child->bounds();
+ }
+ }
+ return result;
+}
+
+SPHatch::RenderInfo SPHatch::calculateRenderInfo(unsigned key) const
+{
+ RenderInfo info;
+ for (const auto & iter : _display) {
+ if (iter.key == key) {
+ return _calculateRenderInfo(iter);
+ }
+ }
+ g_assert_not_reached();
+ return info;
+}
+
+void SPHatch::_updateView(View &view)
+{
+ RenderInfo info = _calculateRenderInfo(view);
+ //The rendering of hatch overflow is implemented by repeated drawing
+ //of hatch paths over one strip. Within each iteration paths are moved by pitch value.
+ //The movement progresses from right to left. This gives the same result
+ //as drawing whole strips in left-to-right order.
+
+
+ view.arenaitem->setChildTransform(info.child_transform);
+ view.arenaitem->setPatternToUserTransform(info.pattern_to_user_transform);
+ view.arenaitem->setTileRect(info.tile_rect);
+ view.arenaitem->setStyle(style);
+ view.arenaitem->setOverflow(info.overflow_initial_transform, info.overflow_steps,
+ info.overflow_step_transform);
+}
+
+SPHatch::RenderInfo SPHatch::_calculateRenderInfo(View const &view) const
+{
+ RenderInfo info;
+
+ Geom::OptInterval extents = _calculateStripExtents(view.bbox);
+ if (extents) {
+ double tile_x = x();
+ double tile_y = y();
+ double tile_width = pitch();
+ double tile_height = extents->max() - extents->min();
+ double tile_rotate = rotate();
+ double tile_render_y = extents->min();
+
+ if (view.bbox && (hatchUnits() == UNITS_OBJECTBOUNDINGBOX)) {
+ tile_x *= view.bbox->width();
+ tile_y *= view.bbox->height();
+ tile_width *= view.bbox->width();
+ }
+
+ // Extent calculated using content units, need to correct.
+ if (view.bbox && (hatchContentUnits() == UNITS_OBJECTBOUNDINGBOX)) {
+ tile_height *= view.bbox->height();
+ tile_render_y *= view.bbox->height();
+ }
+
+ // Pattern size in hatch space
+ Geom::Rect hatch_tile = Geom::Rect::from_xywh(0, tile_render_y, tile_width, tile_height);
+
+ // Content to bbox
+ Geom::Affine content2ps;
+ if (view.bbox && (hatchContentUnits() == UNITS_OBJECTBOUNDINGBOX)) {
+ content2ps = Geom::Affine(view.bbox->width(), 0.0, 0.0, view.bbox->height(), 0, 0);
+ }
+
+ // Tile (hatch space) to user.
+ Geom::Affine ps2user = Geom::Translate(tile_x, tile_y) * Geom::Rotate::from_degrees(tile_rotate) * hatchTransform();
+
+ info.child_transform = content2ps;
+ info.pattern_to_user_transform = ps2user;
+ info.tile_rect = hatch_tile;
+
+ if (style->overflow.computed == SP_CSS_OVERFLOW_VISIBLE) {
+ Geom::Interval bounds = this->bounds();
+ gdouble pitch = this->pitch();
+ if (view.bbox) {
+ if (hatchUnits() == UNITS_OBJECTBOUNDINGBOX) {
+ pitch *= view.bbox->width();
+ }
+ if (hatchContentUnits() == UNITS_OBJECTBOUNDINGBOX) {
+ bounds *= view.bbox->width();
+ }
+ }
+ gdouble overflow_right_strip = floor(bounds.max() / pitch) * pitch;
+ info.overflow_steps = ceil((overflow_right_strip - bounds.min()) / pitch) + 1;
+ info.overflow_step_transform = Geom::Translate(pitch, 0.0);
+ info.overflow_initial_transform = Geom::Translate(-overflow_right_strip, 0.0);
+ } else {
+ info.overflow_steps = 1;
+ }
+ }
+
+ return info;
+}
+
+//calculates strip extents in content space
+Geom::OptInterval SPHatch::_calculateStripExtents(Geom::OptRect const &bbox) const
+{
+ if (!bbox || (bbox->area() == 0)) {
+ return Geom::OptInterval();
+ } else {
+ double tile_x = x();
+ double tile_y = y();
+ double tile_rotate = rotate();
+
+ Geom::Affine ps2user = Geom::Translate(tile_x, tile_y) * Geom::Rotate::from_degrees(tile_rotate) * hatchTransform();
+ Geom::Affine user2ps = ps2user.inverse();
+
+ Geom::Interval extents;
+ for (int i = 0; i < 4; ++i) {
+ Geom::Point corner = bbox->corner(i);
+ Geom::Point corner_ps = corner * user2ps;
+ if (i == 0 || corner_ps.y() < extents.min()) {
+ extents.setMin(corner_ps.y());
+ }
+ if (i == 0 || corner_ps.y() > extents.max()) {
+ extents.setMax(corner_ps.y());
+ }
+ }
+
+ if (hatchContentUnits() == UNITS_OBJECTBOUNDINGBOX) {
+ extents /= bbox->height();
+ }
+
+ return extents;
+ }
+}
+
+cairo_pattern_t* SPHatch::pattern_new(cairo_t * /*base_ct*/, Geom::OptRect const &/*bbox*/, double /*opacity*/)
+{
+ //this code should not be used
+ //it is however required by the fact that SPPaintServer::hatch_new is pure virtual
+ return cairo_pattern_create_rgb(0.5, 0.5, 1.0);
+}
+
+void SPHatch::setBBox(unsigned int key, Geom::OptRect const &bbox)
+{
+ for (auto & iter : _display) {
+ if (iter.key == key) {
+ iter.bbox = bbox;
+ break;
+ }
+ }
+}
+
+//
+
+SPHatch::RenderInfo::RenderInfo()
+ : child_transform(),
+ pattern_to_user_transform(),
+ tile_rect(),
+ overflow_steps(0),
+ overflow_step_transform(),
+ overflow_initial_transform()
+{
+}
+
+SPHatch::RenderInfo::~RenderInfo()
+= default;
+
+//
+
+SPHatch::View::View(Inkscape::DrawingPattern *arenaitem, int key)
+ : arenaitem(arenaitem),
+ bbox(),
+ key(key)
+{
+}
+
+SPHatch::View::~View()
+{
+ // remember, do not delete arenaitem here
+ arenaitem = nullptr;
+}
+
+/*
+ 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 :