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// SPDX-License-Identifier: GPL-2.0-or-later
/** \file
* SVG <feComponentTransfer> implementation.
*
*/
/*
* Authors:
* hugo Rodrigues <haa.rodrigues@gmail.com>
* Abhishek Sharma
*
* Copyright (C) 2006 Hugo Rodrigues
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#include "attributes.h"
#include "document.h"
// In same directory
#include "componenttransfer.h"
#include "componenttransfer-funcnode.h"
#include "display/nr-filter.h"
#include "xml/repr.h"
SPFeComponentTransfer::SPFeComponentTransfer()
: SPFilterPrimitive(), renderer(nullptr)
{
}
SPFeComponentTransfer::~SPFeComponentTransfer() = default;
/**
* Reads the Inkscape::XML::Node, and initializes SPFeComponentTransfer 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 SPFeComponentTransfer::build(SPDocument *document, Inkscape::XML::Node *repr) {
SPFilterPrimitive::build(document, repr);
/*LOAD ATTRIBUTES FROM REPR HERE*/
//do we need this?
//document->addResource("feComponentTransfer", object);
}
static void sp_feComponentTransfer_children_modified(SPFeComponentTransfer *sp_componenttransfer)
{
if (sp_componenttransfer->renderer) {
bool set[4] = {false, false, false, false};
for(auto& node: sp_componenttransfer->children) {
int i = 4;
SPFeFuncNode *funcNode = SP_FEFUNCNODE(&node);
if(!funcNode) {
continue;
}
switch (funcNode->channel) {
case SPFeFuncNode::R:
i = 0;
break;
case SPFeFuncNode::G:
i = 1;
break;
case SPFeFuncNode::B:
i = 2;
break;
case SPFeFuncNode::A:
i = 3;
break;
}
if (i == 4) {
g_warning("Unrecognized channel for component transfer.");
break;
}
sp_componenttransfer->renderer->type[i] = ((SPFeFuncNode *) &node)->type;
sp_componenttransfer->renderer->tableValues[i] = ((SPFeFuncNode *) &node)->tableValues;
sp_componenttransfer->renderer->slope[i] = ((SPFeFuncNode *) &node)->slope;
sp_componenttransfer->renderer->intercept[i] = ((SPFeFuncNode *) &node)->intercept;
sp_componenttransfer->renderer->amplitude[i] = ((SPFeFuncNode *) &node)->amplitude;
sp_componenttransfer->renderer->exponent[i] = ((SPFeFuncNode *) &node)->exponent;
sp_componenttransfer->renderer->offset[i] = ((SPFeFuncNode *) &node)->offset;
set[i] = true;
}
// Set any types not explicitly set to the identity transform
for(int i=0;i<4;i++) {
if (!set[i]) {
sp_componenttransfer->renderer->type[i] = Inkscape::Filters::COMPONENTTRANSFER_TYPE_IDENTITY;
}
}
}
}
/**
* Callback for child_added event.
*/
void SPFeComponentTransfer::child_added(Inkscape::XML::Node *child, Inkscape::XML::Node *ref) {
SPFilterPrimitive::child_added(child, ref);
sp_feComponentTransfer_children_modified(this);
this->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
}
/**
* Callback for remove_child event.
*/
void SPFeComponentTransfer::remove_child(Inkscape::XML::Node *child) {
SPFilterPrimitive::remove_child(child);
sp_feComponentTransfer_children_modified(this);
this->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
}
/**
* Drops any allocated memory.
*/
void SPFeComponentTransfer::release() {
SPFilterPrimitive::release();
}
/**
* Sets a specific value in the SPFeComponentTransfer.
*/
void SPFeComponentTransfer::set(SPAttr key, gchar const *value) {
switch(key) {
/*DEAL WITH SETTING ATTRIBUTES HERE*/
default:
SPFilterPrimitive::set(key, value);
break;
}
}
/**
* Receives update notifications.
*/
void SPFeComponentTransfer::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* SPFeComponentTransfer::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 SPFeComponentTransfer::build_renderer(Inkscape::Filters::Filter* filter) {
g_assert(filter != nullptr);
int primitive_n = filter->add_primitive(Inkscape::Filters::NR_FILTER_COMPONENTTRANSFER);
Inkscape::Filters::FilterPrimitive *nr_primitive = filter->get_primitive(primitive_n);
Inkscape::Filters::FilterComponentTransfer *nr_componenttransfer = dynamic_cast<Inkscape::Filters::FilterComponentTransfer*>(nr_primitive);
g_assert(nr_componenttransfer != nullptr);
this->renderer = nr_componenttransfer;
this->renderer_common(nr_primitive);
sp_feComponentTransfer_children_modified(this); //do we need it?!
}
/*
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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