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// SPDX-License-Identifier: GPL-2.0-or-later
/** \file
* SVG <feConvolveMatrix> implementation.
*
*/
/*
* Authors:
* Felipe Corrêa da Silva Sanches <juca@members.fsf.org>
* 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 <cstring>
#include <cmath>
#include <vector>
#include "convolvematrix.h"
#include "attributes.h"
#include "helper-fns.h"
#include "display/nr-filter.h"
#include "xml/repr.h"
SPFeConvolveMatrix::SPFeConvolveMatrix() : SPFilterPrimitive() {
this->bias = 0;
this->divisorIsSet = false;
this->divisor = 0;
//Setting default values:
this->order.set("3 3");
this->targetX = 1;
this->targetY = 1;
this->edgeMode = Inkscape::Filters::CONVOLVEMATRIX_EDGEMODE_DUPLICATE;
this->preserveAlpha = false;
//some helper variables:
this->targetXIsSet = false;
this->targetYIsSet = false;
this->kernelMatrixIsSet = false;
}
SPFeConvolveMatrix::~SPFeConvolveMatrix() = default;
/**
* Reads the Inkscape::XML::Node, and initializes SPFeConvolveMatrix 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 SPFeConvolveMatrix::build(SPDocument *document, Inkscape::XML::Node *repr) {
SPFilterPrimitive::build(document, repr);
/*LOAD ATTRIBUTES FROM REPR HERE*/
this->readAttr(SPAttr::ORDER);
this->readAttr(SPAttr::KERNELMATRIX);
this->readAttr(SPAttr::DIVISOR);
this->readAttr(SPAttr::BIAS);
this->readAttr(SPAttr::TARGETX);
this->readAttr(SPAttr::TARGETY);
this->readAttr(SPAttr::EDGEMODE);
this->readAttr(SPAttr::KERNELUNITLENGTH);
this->readAttr(SPAttr::PRESERVEALPHA);
}
/**
* Drops any allocated memory.
*/
void SPFeConvolveMatrix::release() {
SPFilterPrimitive::release();
}
static Inkscape::Filters::FilterConvolveMatrixEdgeMode sp_feConvolveMatrix_read_edgeMode(gchar const *value){
if (!value) {
return Inkscape::Filters::CONVOLVEMATRIX_EDGEMODE_DUPLICATE; //duplicate is default
}
switch (value[0]) {
case 'd':
if (strncmp(value, "duplicate", 9) == 0) {
return Inkscape::Filters::CONVOLVEMATRIX_EDGEMODE_DUPLICATE;
}
break;
case 'w':
if (strncmp(value, "wrap", 4) == 0) {
return Inkscape::Filters::CONVOLVEMATRIX_EDGEMODE_WRAP;
}
break;
case 'n':
if (strncmp(value, "none", 4) == 0) {
return Inkscape::Filters::CONVOLVEMATRIX_EDGEMODE_NONE;
}
break;
}
return Inkscape::Filters::CONVOLVEMATRIX_EDGEMODE_DUPLICATE; //duplicate is default
}
/**
* Sets a specific value in the SPFeConvolveMatrix.
*/
void SPFeConvolveMatrix::set(SPAttr key, gchar const *value) {
double read_num;
int read_int;
bool read_bool;
Inkscape::Filters::FilterConvolveMatrixEdgeMode read_mode;
switch(key) {
/*DEAL WITH SETTING ATTRIBUTES HERE*/
case SPAttr::ORDER:
this->order.set(value);
//From SVG spec: If <orderY> is not provided, it defaults to <orderX>.
if (this->order.optNumIsSet() == false) {
this->order.setOptNumber(this->order.getNumber());
}
if (this->targetXIsSet == false) {
this->targetX = (int) floor(this->order.getNumber()/2);
}
if (this->targetYIsSet == false) {
this->targetY = (int) floor(this->order.getOptNumber()/2);
}
this->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
break;
case SPAttr::KERNELMATRIX:
if (value){
this->kernelMatrixIsSet = true;
this->kernelMatrix = helperfns_read_vector(value);
if (! this->divisorIsSet) {
this->divisor = 0;
for (double i : this->kernelMatrix) {
this->divisor += i;
}
if (this->divisor == 0) {
this->divisor = 1;
}
}
this->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
} else {
g_warning("For feConvolveMatrix you MUST pass a kernelMatrix parameter!");
}
break;
case SPAttr::DIVISOR:
if (value) {
read_num = helperfns_read_number(value);
if (read_num == 0) {
// This should actually be an error, but given our UI it is more useful to simply set divisor to the default.
if (this->kernelMatrixIsSet) {
for (double i : this->kernelMatrix) {
read_num += i;
}
}
if (read_num == 0) {
read_num = 1;
}
if (this->divisorIsSet || this->divisor!=read_num) {
this->divisorIsSet = false;
this->divisor = read_num;
this->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
}
} else if (!this->divisorIsSet || this->divisor!=read_num) {
this->divisorIsSet = true;
this->divisor = read_num;
this->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
}
}
break;
case SPAttr::BIAS:
read_num = 0;
if (value) {
read_num = helperfns_read_number(value);
}
if (read_num != this->bias){
this->bias = read_num;
this->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
}
break;
case SPAttr::TARGETX:
if (value) {
read_int = (int) helperfns_read_number(value);
if (read_int < 0 || read_int > this->order.getNumber()){
g_warning("targetX must be a value between 0 and orderX! Assuming floor(orderX/2) as default value.");
read_int = (int) floor(this->order.getNumber()/2.0);
}
this->targetXIsSet = true;
if (read_int != this->targetX){
this->targetX = read_int;
this->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
}
}
break;
case SPAttr::TARGETY:
if (value) {
read_int = (int) helperfns_read_number(value);
if (read_int < 0 || read_int > this->order.getOptNumber()){
g_warning("targetY must be a value between 0 and orderY! Assuming floor(orderY/2) as default value.");
read_int = (int) floor(this->order.getOptNumber()/2.0);
}
this->targetYIsSet = true;
if (read_int != this->targetY){
this->targetY = read_int;
this->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
}
}
break;
case SPAttr::EDGEMODE:
read_mode = sp_feConvolveMatrix_read_edgeMode(value);
if (read_mode != this->edgeMode){
this->edgeMode = read_mode;
this->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
}
break;
case SPAttr::KERNELUNITLENGTH:
this->kernelUnitLength.set(value);
//From SVG spec: If the <dy> value is not specified, it defaults to the same value as <dx>.
if (this->kernelUnitLength.optNumIsSet() == false) {
this->kernelUnitLength.setOptNumber(this->kernelUnitLength.getNumber());
}
this->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
break;
case SPAttr::PRESERVEALPHA:
read_bool = helperfns_read_bool(value, false);
if (read_bool != this->preserveAlpha){
this->preserveAlpha = read_bool;
this->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
}
break;
default:
SPFilterPrimitive::set(key, value);
break;
}
}
/**
* Receives update notifications.
*/
void SPFeConvolveMatrix::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* SPFeConvolveMatrix::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 SPFeConvolveMatrix::build_renderer(Inkscape::Filters::Filter* filter) {
g_assert(filter != nullptr);
int primitive_n = filter->add_primitive(Inkscape::Filters::NR_FILTER_CONVOLVEMATRIX);
Inkscape::Filters::FilterPrimitive *nr_primitive = filter->get_primitive(primitive_n);
Inkscape::Filters::FilterConvolveMatrix *nr_convolve = dynamic_cast<Inkscape::Filters::FilterConvolveMatrix*>(nr_primitive);
g_assert(nr_convolve != nullptr);
this->renderer_common(nr_primitive);
nr_convolve->set_targetX(this->targetX);
nr_convolve->set_targetY(this->targetY);
nr_convolve->set_orderX( (int)this->order.getNumber() );
nr_convolve->set_orderY( (int)this->order.getOptNumber() );
nr_convolve->set_kernelMatrix(this->kernelMatrix);
nr_convolve->set_divisor(this->divisor);
nr_convolve->set_bias(this->bias);
nr_convolve->set_preserveAlpha(this->preserveAlpha);
}
/*
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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