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Diffstat (limited to '')
| -rw-r--r-- | src/object/filters/convolvematrix.cpp | 318 |
1 files changed, 318 insertions, 0 deletions
diff --git a/src/object/filters/convolvematrix.cpp b/src/object/filters/convolvematrix.cpp new file mode 100644 index 0000000..69a4172 --- /dev/null +++ b/src/object/filters/convolvematrix.cpp @@ -0,0 +1,318 @@ +// 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 : |