diff options
Diffstat (limited to 'src/object/filters/componenttransfer.cpp')
| -rw-r--r-- | src/object/filters/componenttransfer.cpp | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/src/object/filters/componenttransfer.cpp b/src/object/filters/componenttransfer.cpp new file mode 100644 index 0000000..b194902 --- /dev/null +++ b/src/object/filters/componenttransfer.cpp @@ -0,0 +1,189 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/** \file + * SVG <feComponentTransfer> implementation. + * + */ +/* + * Authors: + * 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 "attributes.h" +#include "document.h" + +// In same directory +#include "componenttransfer.h" +#include "componenttransfer-funcnode.h" + +#include "display/nr-filter.h" + +#include "xml/repr.h" + +SPFeComponentTransfer::SPFeComponentTransfer() + : SPFilterPrimitive(), renderer(nullptr) +{ +} + +SPFeComponentTransfer::~SPFeComponentTransfer() = default; + +/** + * Reads the Inkscape::XML::Node, and initializes SPFeComponentTransfer 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 SPFeComponentTransfer::build(SPDocument *document, Inkscape::XML::Node *repr) { + SPFilterPrimitive::build(document, repr); + + /*LOAD ATTRIBUTES FROM REPR HERE*/ + + //do we need this? + //document->addResource("feComponentTransfer", object); +} + +static void sp_feComponentTransfer_children_modified(SPFeComponentTransfer *sp_componenttransfer) +{ + if (sp_componenttransfer->renderer) { + bool set[4] = {false, false, false, false}; + for(auto& node: sp_componenttransfer->children) { + int i = 4; + + SPFeFuncNode *funcNode = SP_FEFUNCNODE(&node); + if(!funcNode) { + continue; + } + + switch (funcNode->channel) { + case SPFeFuncNode::R: + i = 0; + break; + case SPFeFuncNode::G: + i = 1; + break; + case SPFeFuncNode::B: + i = 2; + break; + case SPFeFuncNode::A: + i = 3; + break; + } + + if (i == 4) { + g_warning("Unrecognized channel for component transfer."); + break; + } + sp_componenttransfer->renderer->type[i] = ((SPFeFuncNode *) &node)->type; + sp_componenttransfer->renderer->tableValues[i] = ((SPFeFuncNode *) &node)->tableValues; + sp_componenttransfer->renderer->slope[i] = ((SPFeFuncNode *) &node)->slope; + sp_componenttransfer->renderer->intercept[i] = ((SPFeFuncNode *) &node)->intercept; + sp_componenttransfer->renderer->amplitude[i] = ((SPFeFuncNode *) &node)->amplitude; + sp_componenttransfer->renderer->exponent[i] = ((SPFeFuncNode *) &node)->exponent; + sp_componenttransfer->renderer->offset[i] = ((SPFeFuncNode *) &node)->offset; + set[i] = true; + } + // Set any types not explicitly set to the identity transform + for(int i=0;i<4;i++) { + if (!set[i]) { + sp_componenttransfer->renderer->type[i] = Inkscape::Filters::COMPONENTTRANSFER_TYPE_IDENTITY; + } + } + } +} + +/** + * Callback for child_added event. + */ +void SPFeComponentTransfer::child_added(Inkscape::XML::Node *child, Inkscape::XML::Node *ref) { + SPFilterPrimitive::child_added(child, ref); + + sp_feComponentTransfer_children_modified(this); + this->parent->requestModified(SP_OBJECT_MODIFIED_FLAG); +} + +/** + * Callback for remove_child event. + */ +void SPFeComponentTransfer::remove_child(Inkscape::XML::Node *child) { + SPFilterPrimitive::remove_child(child); + + sp_feComponentTransfer_children_modified(this); + this->parent->requestModified(SP_OBJECT_MODIFIED_FLAG); +} + +/** + * Drops any allocated memory. + */ +void SPFeComponentTransfer::release() { + SPFilterPrimitive::release(); +} + +/** + * Sets a specific value in the SPFeComponentTransfer. + */ +void SPFeComponentTransfer::set(SPAttr key, gchar const *value) { + switch(key) { + /*DEAL WITH SETTING ATTRIBUTES HERE*/ + default: + SPFilterPrimitive::set(key, value); + break; + } +} + +/** + * Receives update notifications. + */ +void SPFeComponentTransfer::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* SPFeComponentTransfer::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 SPFeComponentTransfer::build_renderer(Inkscape::Filters::Filter* filter) { + g_assert(filter != nullptr); + + int primitive_n = filter->add_primitive(Inkscape::Filters::NR_FILTER_COMPONENTTRANSFER); + Inkscape::Filters::FilterPrimitive *nr_primitive = filter->get_primitive(primitive_n); + Inkscape::Filters::FilterComponentTransfer *nr_componenttransfer = dynamic_cast<Inkscape::Filters::FilterComponentTransfer*>(nr_primitive); + g_assert(nr_componenttransfer != nullptr); + + this->renderer = nr_componenttransfer; + this->renderer_common(nr_primitive); + + + sp_feComponentTransfer_children_modified(this); //do we need it?! +} + +/* + 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 : |