sp-mask.cpp revision 51dc158adbe2c9d1df3c941cbf78b90944d1afc2
/*
* 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, 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 "document-private.h"
#include "sp-item.h"
#include "sp-mask.h"
struct SPMaskView {
SPMaskView *next;
unsigned int key;
Inkscape::DrawingItem *arenaitem;
Geom::OptRect bbox;
};
SPMaskView *sp_mask_view_new_prepend (SPMaskView *list, unsigned int key, Inkscape::DrawingItem *arenaitem);
SPMaskView *sp_mask_view_list_remove (SPMaskView *list, SPMaskView *view);
G_DEFINE_TYPE(SPMask, sp_mask, SP_TYPE_OBJECTGROUP);
static void
sp_mask_class_init (SPMaskClass *klass)
{
}
CMask::CMask(SPMask* mask) : CObjectGroup(mask) {
this->spmask = mask;
}
CMask::~CMask() {
}
static void
sp_mask_init (SPMask *mask)
{
mask->cmask = new CMask(mask);
delete mask->cobjectgroup;
mask->cobjectgroup = mask->cmask;
mask->cobject = mask->cmask;
mask->maskUnits_set = FALSE;
mask->maskUnits = SP_CONTENT_UNITS_OBJECTBOUNDINGBOX;
mask->maskContentUnits_set = FALSE;
mask->maskContentUnits = SP_CONTENT_UNITS_USERSPACEONUSE;
mask->display = NULL;
}
void CMask::build(SPDocument* doc, Inkscape::XML::Node* repr) {
SPMask* object = this->spmask;
CObjectGroup::build(doc, repr);
object->readAttr( "maskUnits" );
object->readAttr( "maskContentUnits" );
/* Register ourselves */
doc->addResource("mask", object);
}
void CMask::release() {
SPMask* object = this->spmask;
if (object->document) {
// Unregister ourselves
object->document->removeResource("mask", object);
}
SPMask *cp = SP_MASK (object);
while (cp->display) {
// We simply unref and let item manage this in handler
cp->display = sp_mask_view_list_remove (cp->display, cp->display);
}
CObjectGroup::release();
}
void CMask::set(unsigned int key, const gchar* value) {
SPMask* object = this->spmask;
SPMask *mask = SP_MASK (object);
switch (key) {
case SP_ATTR_MASKUNITS:
mask->maskUnits = SP_CONTENT_UNITS_OBJECTBOUNDINGBOX;
mask->maskUnits_set = FALSE;
if (value) {
if (!strcmp (value, "userSpaceOnUse")) {
mask->maskUnits = SP_CONTENT_UNITS_USERSPACEONUSE;
mask->maskUnits_set = TRUE;
} else if (!strcmp (value, "objectBoundingBox")) {
mask->maskUnits_set = TRUE;
}
}
object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
break;
case SP_ATTR_MASKCONTENTUNITS:
mask->maskContentUnits = SP_CONTENT_UNITS_USERSPACEONUSE;
mask->maskContentUnits_set = FALSE;
if (value) {
if (!strcmp (value, "userSpaceOnUse")) {
mask->maskContentUnits_set = TRUE;
} else if (!strcmp (value, "objectBoundingBox")) {
mask->maskContentUnits = SP_CONTENT_UNITS_OBJECTBOUNDINGBOX;
mask->maskContentUnits_set = TRUE;
}
}
object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
break;
default:
CObjectGroup::set(key, value);
break;
}
}
void CMask::child_added(Inkscape::XML::Node* child, Inkscape::XML::Node* ref) {
SPMask* object = this->spmask;
/* Invoke SPObjectGroup implementation */
CObjectGroup::child_added(child, ref);
/* Show new object */
SPObject *ochild = object->document->getObjectByRepr(child);
if (SP_IS_ITEM (ochild)) {
SPMask *cp = SP_MASK (object);
for (SPMaskView *v = cp->display; v != NULL; v = v->next) {
Inkscape::DrawingItem *ac = SP_ITEM (ochild)->invoke_show ( v->arenaitem->drawing(),
v->key,
SP_ITEM_REFERENCE_FLAGS);
if (ac) {
v->arenaitem->prependChild(ac);
}
}
}
}
void CMask::update(SPCtx* ctx, unsigned int flags) {
SPMask* object = this->spmask;
if (flags & SP_OBJECT_MODIFIED_FLAG) {
flags |= SP_OBJECT_PARENT_MODIFIED_FLAG;
}
flags &= SP_OBJECT_MODIFIED_CASCADE;
SPObjectGroup *og = SP_OBJECTGROUP(object);
GSList *l = NULL;
for (SPObject *child = og->firstChild(); child; child = child->getNext()) {
g_object_ref(G_OBJECT (child));
l = g_slist_prepend (l, child);
}
l = g_slist_reverse (l);
while (l) {
SPObject *child = SP_OBJECT(l->data);
l = g_slist_remove(l, child);
if (flags || (child->uflags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_CHILD_MODIFIED_FLAG))) {
child->updateDisplay(ctx, flags);
}
g_object_unref(G_OBJECT(child));
}
SPMask *mask = SP_MASK(object);
for (SPMaskView *v = mask->display; v != NULL; v = v->next) {
Inkscape::DrawingGroup *g = dynamic_cast<Inkscape::DrawingGroup *>(v->arenaitem);
if (mask->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 CMask::modified(unsigned int flags) {
SPMask* object = this->spmask;
if (flags & SP_OBJECT_MODIFIED_FLAG) {
flags |= SP_OBJECT_PARENT_MODIFIED_FLAG;
}
flags &= SP_OBJECT_MODIFIED_CASCADE;
SPObjectGroup *og = SP_OBJECTGROUP(object);
GSList *l = NULL;
for (SPObject *child = og->firstChild(); child; child = child->getNext()) {
g_object_ref(G_OBJECT(child));
l = g_slist_prepend(l, child);
}
l = g_slist_reverse(l);
while (l) {
SPObject *child = SP_OBJECT(l->data);
l = g_slist_remove(l, child);
if (flags || (child->mflags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_CHILD_MODIFIED_FLAG))) {
child->emitModified(flags);
}
g_object_unref(G_OBJECT(child));
}
}
Inkscape::XML::Node* CMask::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");
}
CObjectGroup::write(xml_doc, repr, flags);
return repr;
}
// Create a mask element (using passed elements), add it to <defs>
const gchar *
sp_mask_create (GSList *reprs, SPDocument *document, Geom::Affine const* applyTransform)
{
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 (GSList *it = reprs; it != NULL; it = it->next) {
Inkscape::XML::Node *node = (Inkscape::XML::Node *)(it->data);
SPItem *item = SP_ITEM(mask_object->appendChildRepr(node));
if (NULL != applyTransform) {
Geom::Affine transform (item->transform);
transform *= (*applyTransform);
item->doWriteTransform(item->getRepr(), transform);
}
}
if (repr != defsrepr->lastChild())
defsrepr->changeOrder(repr, defsrepr->lastChild()); // workaround for bug 989084
Inkscape::GC::release(repr);
return mask_id;
}
Inkscape::DrawingItem *sp_mask_show(SPMask *mask, Inkscape::Drawing &drawing, unsigned int key)
{
g_return_val_if_fail (mask != NULL, NULL);
g_return_val_if_fail (SP_IS_MASK (mask), NULL);
Inkscape::DrawingGroup *ai = new Inkscape::DrawingGroup(drawing);
mask->display = sp_mask_view_new_prepend (mask->display, key, ai);
for ( SPObject *child = mask->firstChild() ; child; child = child->getNext() ) {
if (SP_IS_ITEM (child)) {
Inkscape::DrawingItem *ac = SP_ITEM (child)->invoke_show (drawing, key, SP_ITEM_REFERENCE_FLAGS);
if (ac) {
ai->prependChild(ac);
}
}
}
if (mask->maskContentUnits == SP_CONTENT_UNITS_OBJECTBOUNDINGBOX && mask->display->bbox) {
Geom::Affine t = Geom::Scale(mask->display->bbox->dimensions());
t.setTranslation(mask->display->bbox->min());
ai->setChildTransform(t);
}
return ai;
}
void sp_mask_hide(SPMask *cp, unsigned int key)
{
g_return_if_fail (cp != NULL);
g_return_if_fail (SP_IS_MASK (cp));
for ( SPObject *child = cp->firstChild(); child; child = child->getNext()) {
if (SP_IS_ITEM (child)) {
SP_ITEM(child)->invoke_hide (key);
}
}
for (SPMaskView *v = cp->display; v != NULL; v = v->next) {
if (v->key == key) {
/* We simply unref and let item to manage this in handler */
cp->display = sp_mask_view_list_remove (cp->display, v);
return;
}
}
g_assert_not_reached ();
}
void
sp_mask_set_bbox (SPMask *mask, unsigned int key, Geom::OptRect const &bbox)
{
for (SPMaskView *v = mask->display; v != NULL; 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 :