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// SPDX-License-Identifier: GPL-2.0-or-later
/** \file
* SVG <feImage> implementation.
*
*/
/*
* Authors:
* Felipe Corrêa da Silva Sanches <juca@members.fsf.org>
* hugo Rodrigues <haa.rodrigues@gmail.com>
* Abhishek Sharma
*
* Copyright (C) 2007 Felipe Sanches
* Copyright (C) 2006 Hugo Rodrigues
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#include "image.h"
#include <sigc++/bind.h>
#include "attributes.h"
#include "enums.h"
#include "bad-uri-exception.h"
#include "object/sp-image.h"
#include "object/uri.h"
#include "object/uri-references.h"
#include "display/nr-filter-image.h"
#include "display/nr-filter.h"
#include "xml/repr.h"
SPFeImage::SPFeImage() : SPFilterPrimitive() {
this->href = nullptr;
this->from_element = false;
this->SVGElemRef = nullptr;
this->SVGElem = nullptr;
this->aspect_align = SP_ASPECT_XMID_YMID; // Default
this->aspect_clip = SP_ASPECT_MEET; // Default
}
SPFeImage::~SPFeImage() = default;
/**
* Reads the Inkscape::XML::Node, and initializes SPFeImage variables. For this to get called,
* our name must be associated with a repr via "sp_object_type_register". Best done through
* sp-object-repr.cpp's repr_name_entries array.
*/
void SPFeImage::build(SPDocument *document, Inkscape::XML::Node *repr)
{
SPFilterPrimitive::build(document, repr);
/*LOAD ATTRIBUTES FROM REPR HERE*/
this->readAttr(SPAttr::PRESERVEASPECTRATIO);
this->readAttr(SPAttr::XLINK_HREF);
}
/**
* Drops any allocated memory.
*/
void SPFeImage::release() {
this->_image_modified_connection.disconnect();
this->_href_modified_connection.disconnect();
if (this->SVGElemRef) {
delete this->SVGElemRef;
}
SPFilterPrimitive::release();
}
static void sp_feImage_elem_modified(SPObject* /*href*/, guint /*flags*/, SPObject* obj)
{
obj->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
}
static void sp_feImage_href_modified(SPObject* /*old_elem*/, SPObject* new_elem, SPObject* obj)
{
SPFeImage *feImage = SP_FEIMAGE(obj);
feImage->_image_modified_connection.disconnect();
if (new_elem) {
feImage->SVGElem = SP_ITEM(new_elem);
feImage->_image_modified_connection = ((SPObject*) feImage->SVGElem)->connectModified(sigc::bind(sigc::ptr_fun(&sp_feImage_elem_modified), obj));
} else {
feImage->SVGElem = nullptr;
}
obj->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
}
/**
* Sets a specific value in the SPFeImage.
*/
void SPFeImage::set(SPAttr key, gchar const *value) {
switch(key) {
/*DEAL WITH SETTING ATTRIBUTES HERE*/
case SPAttr::XLINK_HREF:
if (this->href) {
g_free(this->href);
}
this->href = (value) ? g_strdup (value) : nullptr;
if (!this->href) return;
delete this->SVGElemRef;
this->SVGElemRef = nullptr;
this->SVGElem = nullptr;
this->_image_modified_connection.disconnect();
this->_href_modified_connection.disconnect();
try{
Inkscape::URI SVGElem_uri(this->href);
this->SVGElemRef = new Inkscape::URIReference(this->document);
this->SVGElemRef->attach(SVGElem_uri);
this->from_element = true;
this->_href_modified_connection = this->SVGElemRef->changedSignal().connect(sigc::bind(sigc::ptr_fun(&sp_feImage_href_modified), this));
if (SPObject *elemref = this->SVGElemRef->getObject()) {
this->SVGElem = SP_ITEM(elemref);
this->_image_modified_connection = ((SPObject*) this->SVGElem)->connectModified(sigc::bind(sigc::ptr_fun(&sp_feImage_elem_modified), this));
this->requestModified(SP_OBJECT_MODIFIED_FLAG);
break;
} else {
g_warning("SVG element URI was not found in the document while loading this: %s", value);
}
}
// catches either MalformedURIException or UnsupportedURIException
catch(const Inkscape::BadURIException & e)
{
this->from_element = false;
/* This occurs when using external image as the source */
//g_warning("caught Inkscape::BadURIException in sp_feImage_set");
break;
}
break;
case SPAttr::PRESERVEASPECTRATIO:
/* Copied from sp-image.cpp */
/* Do setup before, so we can use break to escape */
this->aspect_align = SP_ASPECT_XMID_YMID; // Default
this->aspect_clip = SP_ASPECT_MEET; // Default
this->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG);
if (value) {
int len;
gchar c[256];
const gchar *p, *e;
unsigned int align, clip;
p = value;
while (*p && *p == 32) p += 1;
if (!*p) break;
e = p;
while (*e && *e != 32) e += 1;
len = e - p;
if (len > 8) break;
memcpy (c, value, len);
c[len] = 0;
/* Now the actual part */
if (!strcmp (c, "none")) {
align = SP_ASPECT_NONE;
} else if (!strcmp (c, "xMinYMin")) {
align = SP_ASPECT_XMIN_YMIN;
} else if (!strcmp (c, "xMidYMin")) {
align = SP_ASPECT_XMID_YMIN;
} else if (!strcmp (c, "xMaxYMin")) {
align = SP_ASPECT_XMAX_YMIN;
} else if (!strcmp (c, "xMinYMid")) {
align = SP_ASPECT_XMIN_YMID;
} else if (!strcmp (c, "xMidYMid")) {
align = SP_ASPECT_XMID_YMID;
} else if (!strcmp (c, "xMaxYMid")) {
align = SP_ASPECT_XMAX_YMID;
} else if (!strcmp (c, "xMinYMax")) {
align = SP_ASPECT_XMIN_YMAX;
} else if (!strcmp (c, "xMidYMax")) {
align = SP_ASPECT_XMID_YMAX;
} else if (!strcmp (c, "xMaxYMax")) {
align = SP_ASPECT_XMAX_YMAX;
} else {
g_warning("Illegal preserveAspectRatio: %s", c);
break;
}
clip = SP_ASPECT_MEET;
while (*e && *e == 32) e += 1;
if (*e) {
if (!strcmp (e, "meet")) {
clip = SP_ASPECT_MEET;
} else if (!strcmp (e, "slice")) {
clip = SP_ASPECT_SLICE;
} else {
break;
}
}
this->aspect_align = align;
this->aspect_clip = clip;
}
break;
default:
SPFilterPrimitive::set(key, value);
break;
}
}
/*
* Check if the object is being used in the filter's definition
* and returns true if it is being used (to avoid infinate loops)
*/
bool SPFeImage::valid_for(SPObject const *obj) const
{
// SVGElem could be nullptr, but this should still work.
return obj && SP_ITEM(obj) != SVGElem;
}
/**
* Receives update notifications.
*/
void SPFeImage::update(SPCtx *ctx, guint flags) {
if (flags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG |
SP_OBJECT_VIEWPORT_MODIFIED_FLAG)) {
/* do something to trigger redisplay, updates? */
}
SPFilterPrimitive::update(ctx, flags);
}
/**
* Writes its settings to an incoming repr object, if any.
*/
Inkscape::XML::Node* SPFeImage::write(Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags) {
/* TODO: Don't just clone, but create a new repr node and write all
* relevant values into it */
if (!repr) {
repr = this->getRepr()->duplicate(doc);
}
SPFilterPrimitive::write(doc, repr, flags);
return repr;
}
void SPFeImage::build_renderer(Inkscape::Filters::Filter* filter) {
g_assert(filter != nullptr);
int primitive_n = filter->add_primitive(Inkscape::Filters::NR_FILTER_IMAGE);
Inkscape::Filters::FilterPrimitive *nr_primitive = filter->get_primitive(primitive_n);
Inkscape::Filters::FilterImage *nr_image = dynamic_cast<Inkscape::Filters::FilterImage*>(nr_primitive);
g_assert(nr_image != nullptr);
this->renderer_common(nr_primitive);
nr_image->from_element = this->from_element;
nr_image->SVGElem = this->SVGElem;
nr_image->set_align( this->aspect_align );
nr_image->set_clip( this->aspect_clip );
nr_image->set_href(this->href);
nr_image->set_document(this->document);
}
/*
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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