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// SPDX-License-Identifier: GPL-2.0-or-later
/** \file
* SVG <funcR>, <funcG>, <funcB> and <funcA> implementations.
*/
/*
* Authors:
* Hugo Rodrigues <haa.rodrigues@gmail.com>
* Niko Kiirala <niko@kiirala.com>
* Felipe Corrêa da Silva Sanches <juca@members.fsf.org>
* Abhishek Sharma
*
* Copyright (C) 2006, 2007, 2008 Authors
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#include <glib.h>
#include "attributes.h"
#include "document.h"
#include "componenttransfer.h"
#include "componenttransfer-funcnode.h"
#include "xml/repr.h"
#include "helper-fns.h"
/* FeFuncNode class */
SPFeFuncNode::SPFeFuncNode(SPFeFuncNode::Channel channel)
: SPObject(), type(Inkscape::Filters::COMPONENTTRANSFER_TYPE_IDENTITY),
slope(1), intercept(0), amplitude(1), exponent(1), offset(0), channel(channel) {
}
SPFeFuncNode::~SPFeFuncNode() = default;
/**
* Reads the Inkscape::XML::Node, and initializes SPDistantLight 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 SPFeFuncNode::build(SPDocument *document, Inkscape::XML::Node *repr) {
SPObject::build(document, repr);
//Read values of key attributes from XML nodes into object.
this->readAttr(SPAttr::TYPE);
this->readAttr(SPAttr::TABLEVALUES);
this->readAttr(SPAttr::SLOPE);
this->readAttr(SPAttr::INTERCEPT);
this->readAttr(SPAttr::AMPLITUDE);
this->readAttr(SPAttr::EXPONENT);
this->readAttr(SPAttr::OFFSET);
//is this necessary?
document->addResource("fefuncnode", this); //maybe feFuncR, fefuncG, feFuncB and fefuncA ?
}
/**
* Drops any allocated memory.
*/
void SPFeFuncNode::release() {
if ( this->document ) {
// Unregister ourselves
this->document->removeResource("fefuncnode", this);
}
//TODO: release resources here
}
static Inkscape::Filters::FilterComponentTransferType sp_feComponenttransfer_read_type(gchar const *value){
if (!value) {
return Inkscape::Filters::COMPONENTTRANSFER_TYPE_ERROR; //type attribute is REQUIRED.
}
switch(value[0]){
case 'i':
if (strncmp(value, "identity", 8) == 0) {
return Inkscape::Filters::COMPONENTTRANSFER_TYPE_IDENTITY;
}
break;
case 't':
if (strncmp(value, "table", 5) == 0) {
return Inkscape::Filters::COMPONENTTRANSFER_TYPE_TABLE;
}
break;
case 'd':
if (strncmp(value, "discrete", 8) == 0) {
return Inkscape::Filters::COMPONENTTRANSFER_TYPE_DISCRETE;
}
break;
case 'l':
if (strncmp(value, "linear", 6) == 0) {
return Inkscape::Filters::COMPONENTTRANSFER_TYPE_LINEAR;
}
break;
case 'g':
if (strncmp(value, "gamma", 5) == 0) {
return Inkscape::Filters::COMPONENTTRANSFER_TYPE_GAMMA;
}
break;
}
return Inkscape::Filters::COMPONENTTRANSFER_TYPE_ERROR; //type attribute is REQUIRED.
}
/**
* Sets a specific value in the SPFeFuncNode.
*/
void SPFeFuncNode::set(SPAttr key, gchar const *value) {
Inkscape::Filters::FilterComponentTransferType type;
double read_num;
switch(key) {
case SPAttr::TYPE:
type = sp_feComponenttransfer_read_type(value);
if(type != this->type) {
this->type = type;
this->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
}
break;
case SPAttr::TABLEVALUES:
if (value){
this->tableValues = helperfns_read_vector(value);
this->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
}
break;
case SPAttr::SLOPE:
read_num = value ? helperfns_read_number(value) : 1;
if (read_num != this->slope) {
this->slope = read_num;
this->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
}
break;
case SPAttr::INTERCEPT:
read_num = value ? helperfns_read_number(value) : 0;
if (read_num != this->intercept) {
this->intercept = read_num;
this->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
}
break;
case SPAttr::AMPLITUDE:
read_num = value ? helperfns_read_number(value) : 1;
if (read_num != this->amplitude) {
this->amplitude = read_num;
this->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
}
break;
case SPAttr::EXPONENT:
read_num = value ? helperfns_read_number(value) : 1;
if (read_num != this->exponent) {
this->exponent = read_num;
this->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
}
break;
case SPAttr::OFFSET:
read_num = value ? helperfns_read_number(value) : 0;
if (read_num != this->offset) {
this->offset = read_num;
this->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
}
break;
default:
SPObject::set(key, value);
break;
}
}
/**
* Receives update notifications.
*/
void SPFeFuncNode::update(SPCtx *ctx, guint flags) {
std::cout << "SPFeFuncNode::update" << std::endl;
if (flags & SP_OBJECT_MODIFIED_FLAG) {
this->readAttr(SPAttr::TYPE);
this->readAttr(SPAttr::TABLEVALUES);
this->readAttr(SPAttr::SLOPE);
this->readAttr(SPAttr::INTERCEPT);
this->readAttr(SPAttr::AMPLITUDE);
this->readAttr(SPAttr::EXPONENT);
this->readAttr(SPAttr::OFFSET);
}
SPObject::update(ctx, flags);
}
/**
* Writes its settings to an incoming repr object, if any.
*/
Inkscape::XML::Node* SPFeFuncNode::write(Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags) {
std::cout << "SPFeFuncNode::write" << std::endl;
if (!repr) {
repr = this->getRepr()->duplicate(doc);
}
SPObject::write(doc, repr, flags);
return repr;
}
/*
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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