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Diffstat (limited to 'src/object/filters/componenttransfer-funcnode.cpp')
| -rw-r--r-- | src/object/filters/componenttransfer-funcnode.cpp | 213 |
1 files changed, 213 insertions, 0 deletions
diff --git a/src/object/filters/componenttransfer-funcnode.cpp b/src/object/filters/componenttransfer-funcnode.cpp new file mode 100644 index 0000000..d73fbee --- /dev/null +++ b/src/object/filters/componenttransfer-funcnode.cpp @@ -0,0 +1,213 @@ +// 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 : |