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Diffstat (limited to 'src/object/filters/colormatrix.cpp')
| -rw-r--r-- | src/object/filters/colormatrix.cpp | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/src/object/filters/colormatrix.cpp b/src/object/filters/colormatrix.cpp new file mode 100644 index 0000000..a429554 --- /dev/null +++ b/src/object/filters/colormatrix.cpp @@ -0,0 +1,187 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/** \file + * SVG <feColorMatrix> implementation. + * + */ +/* + * Authors: + * Felipe Sanches <juca@members.fsf.org> + * hugo Rodrigues <haa.rodrigues@gmail.com> + * Abhishek Sharma + * + * Copyright (C) 2007 Felipe C. da S. Sanches + * Copyright (C) 2006 Hugo Rodrigues + * + * Released under GNU GPL v2+, read the file 'COPYING' for more information. + */ + +#include <cstring> + +#include "attributes.h" +#include "svg/svg.h" +#include "colormatrix.h" +#include "xml/repr.h" +#include "helper-fns.h" + +#include "display/nr-filter.h" + +SPFeColorMatrix::SPFeColorMatrix() + : SPFilterPrimitive() +{ +} + +SPFeColorMatrix::~SPFeColorMatrix() = default; + +/** + * Reads the Inkscape::XML::Node, and initializes SPFeColorMatrix 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 SPFeColorMatrix::build(SPDocument *document, Inkscape::XML::Node *repr) { + SPFilterPrimitive::build(document, repr); + + /*LOAD ATTRIBUTES FROM REPR HERE*/ + this->readAttr(SPAttr::TYPE); + this->readAttr(SPAttr::VALUES); +} + +/** + * Drops any allocated memory. + */ +void SPFeColorMatrix::release() { + SPFilterPrimitive::release(); +} + +static Inkscape::Filters::FilterColorMatrixType sp_feColorMatrix_read_type(gchar const *value){ + if (!value) { + return Inkscape::Filters::COLORMATRIX_MATRIX; //matrix is default + } + + switch(value[0]){ + case 'm': + if (strcmp(value, "matrix") == 0) return Inkscape::Filters::COLORMATRIX_MATRIX; + break; + case 's': + if (strcmp(value, "saturate") == 0) return Inkscape::Filters::COLORMATRIX_SATURATE; + break; + case 'h': + if (strcmp(value, "hueRotate") == 0) return Inkscape::Filters::COLORMATRIX_HUEROTATE; + break; + case 'l': + if (strcmp(value, "luminanceToAlpha") == 0) return Inkscape::Filters::COLORMATRIX_LUMINANCETOALPHA; + break; + } + + return Inkscape::Filters::COLORMATRIX_MATRIX; //matrix is default +} + +/** + * Sets a specific value in the SPFeColorMatrix. + */ +void SPFeColorMatrix::set(SPAttr key, gchar const *str) { + Inkscape::Filters::FilterColorMatrixType read_type; + + /*DEAL WITH SETTING ATTRIBUTES HERE*/ + switch(key) { + case SPAttr::TYPE: + read_type = sp_feColorMatrix_read_type(str); + + if (this->type != read_type){ + this->type = read_type; + + // Set the default value of "value" (this may happen if the attribute "Type" is changed interactively). + if (!value_set) { + value = 0; + if (type == Inkscape::Filters::COLORMATRIX_SATURATE) { + value = 1; + } + } + this->parent->requestModified(SP_OBJECT_MODIFIED_FLAG); + } + break; + + case SPAttr::VALUES: + if (str) { + this->values = helperfns_read_vector(str); + this->value = helperfns_read_number(str, HELPERFNS_NO_WARNING); + value_set = true; + } else { + // Set defaults + switch (type) { + case Inkscape::Filters::COLORMATRIX_MATRIX: + values = {1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0 }; + break; + case Inkscape::Filters::COLORMATRIX_SATURATE: + // Default value for saturate is 1.0 ("values" not used). + value = 1.0; + break; + case Inkscape::Filters::COLORMATRIX_HUEROTATE: + value = 0.0; + break; + case Inkscape::Filters::COLORMATRIX_LUMINANCETOALPHA: + // value, values not used. + break; + } + value_set = false; + } + this->parent->requestModified(SP_OBJECT_MODIFIED_FLAG); + break; + default: + SPFilterPrimitive::set(key, str); + break; + } +} + +/** + * Receives update notifications. + */ +void SPFeColorMatrix::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* SPFeColorMatrix::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 SPFeColorMatrix::build_renderer(Inkscape::Filters::Filter* filter) { + g_assert(filter != nullptr); + + int primitive_n = filter->add_primitive(Inkscape::Filters::NR_FILTER_COLORMATRIX); + Inkscape::Filters::FilterPrimitive *nr_primitive = filter->get_primitive(primitive_n); + Inkscape::Filters::FilterColorMatrix *nr_colormatrix = dynamic_cast<Inkscape::Filters::FilterColorMatrix*>(nr_primitive); + g_assert(nr_colormatrix != nullptr); + + this->renderer_common(nr_primitive); + nr_colormatrix->set_type(this->type); + nr_colormatrix->set_value(this->value); + nr_colormatrix->set_values(this->values); +} + +/* + 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 : |