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#define __SP_FEBLEND_CPP__
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* SVG <feBlend> implementation.
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* Hugo Rodrigues <haa.rodrigues@gmail.com>
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* Niko Kiirala <niko@kiirala.com>
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* Copyright (C) 2006,2007 authors
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* Released under GNU GPL, read the file 'COPYING' for more information
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#include "attributes.h"
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#include "sp-feblend.h"
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#include "display/nr-filter.h"
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#include "display/nr-filter-primitive.h"
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#include "display/nr-filter-blend.h"
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#include "display/nr-filter-types.h"
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/* FeBlend base class */
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static void sp_feBlend_class_init(SPFeBlendClass *klass);
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static void sp_feBlend_init(SPFeBlend *feBlend);
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static void sp_feBlend_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);
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static void sp_feBlend_release(SPObject *object);
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static void sp_feBlend_set(SPObject *object, unsigned int key, gchar const *value);
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static void sp_feBlend_update(SPObject *object, SPCtx *ctx, guint flags);
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static Inkscape::XML::Node *sp_feBlend_write(SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags);
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static void sp_feBlend_build_renderer(SPFilterPrimitive *sp_prim, NR::Filter *filter);
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static SPFilterPrimitiveClass *feBlend_parent_class;
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static GType feBlend_type = 0;
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GTypeInfo feBlend_info = {
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sizeof(SPFeBlendClass),
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(GClassInitFunc) sp_feBlend_class_init,
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(GInstanceInitFunc) sp_feBlend_init,
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NULL, /* value_table */
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feBlend_type = g_type_register_static(SP_TYPE_FILTER_PRIMITIVE, "SPFeBlend", &feBlend_info, (GTypeFlags)0);
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sp_feBlend_class_init(SPFeBlendClass *klass)
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SPObjectClass *sp_object_class = (SPObjectClass *)klass;
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SPFilterPrimitiveClass *sp_primitive_class = (SPFilterPrimitiveClass *)klass;
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feBlend_parent_class = (SPFilterPrimitiveClass*)g_type_class_peek_parent(klass);
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sp_object_class->build = sp_feBlend_build;
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sp_object_class->release = sp_feBlend_release;
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sp_object_class->write = sp_feBlend_write;
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sp_object_class->set = sp_feBlend_set;
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sp_object_class->update = sp_feBlend_update;
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sp_primitive_class->build_renderer = sp_feBlend_build_renderer;
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sp_feBlend_init(SPFeBlend *feBlend)
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feBlend->in2 = NR::NR_FILTER_SLOT_NOT_SET;
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* Reads the Inkscape::XML::Node, and initializes SPFeBlend variables. For this to get called,
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* our name must be associated with a repr via "sp_object_type_register". Best done through
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* sp-object-repr.cpp's repr_name_entries array.
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sp_feBlend_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
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if (((SPObjectClass *) feBlend_parent_class)->build) {
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((SPObjectClass *) feBlend_parent_class)->build(object, document, repr);
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/*LOAD ATTRIBUTES FROM REPR HERE*/
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sp_object_read_attr(object, "mode");
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sp_object_read_attr(object, "in2");
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* Drops any allocated memory.
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sp_feBlend_release(SPObject *object)
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if (((SPObjectClass *) feBlend_parent_class)->release)
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((SPObjectClass *) feBlend_parent_class)->release(object);
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static NR::FilterBlendMode sp_feBlend_readmode(gchar const *value)
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if (!value) return NR::BLEND_NORMAL;
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if (strncmp(value, "normal", 6) == 0)
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return NR::BLEND_NORMAL;
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if (strncmp(value, "multiply", 8) == 0)
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return NR::BLEND_MULTIPLY;
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if (strncmp(value, "screen", 6) == 0)
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return NR::BLEND_SCREEN;
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if (strncmp(value, "darken", 6) == 0)
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return NR::BLEND_DARKEN;
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if (strncmp(value, "lighten", 7) == 0)
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return NR::BLEND_LIGHTEN;
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// do nothing by default
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return NR::BLEND_NORMAL;
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* Sets a specific value in the SPFeBlend.
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sp_feBlend_set(SPObject *object, unsigned int key, gchar const *value)
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SPFeBlend *feBlend = SP_FEBLEND(object);
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NR::FilterBlendMode mode;
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/*DEAL WITH SETTING ATTRIBUTES HERE*/
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mode = sp_feBlend_readmode(value);
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if (mode != feBlend->blend_mode) {
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feBlend->blend_mode = mode;
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object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
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input = sp_filter_primitive_read_in(feBlend, value);
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if (input != feBlend->in2) {
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feBlend->in2 = input;
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object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
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if (((SPObjectClass *) feBlend_parent_class)->set)
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((SPObjectClass *) feBlend_parent_class)->set(object, key, value);
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* Receives update notifications.
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sp_feBlend_update(SPObject *object, SPCtx *ctx, guint flags)
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if (flags & SP_OBJECT_MODIFIED_FLAG) {
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sp_object_read_attr(object, "mode");
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sp_object_read_attr(object, "in2");
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if (((SPObjectClass *) feBlend_parent_class)->update) {
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((SPObjectClass *) feBlend_parent_class)->update(object, ctx, flags);
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* Writes its settings to an incoming repr object, if any.
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static Inkscape::XML::Node *
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sp_feBlend_write(SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags)
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// Inkscape-only object, not copied during an "plain SVG" dump:
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if (flags & SP_OBJECT_WRITE_EXT) {
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// repr->mergeFrom(SP_OBJECT_REPR(object), "id");
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repr = SP_OBJECT_REPR(object)->duplicate(doc);
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if (((SPObjectClass *) feBlend_parent_class)->write) {
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((SPObjectClass *) feBlend_parent_class)->write(object, doc, repr, flags);
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static void sp_feBlend_build_renderer(SPFilterPrimitive *primitive, NR::Filter *filter) {
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g_assert(primitive != NULL);
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g_assert(filter != NULL);
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SPFeBlend *sp_blend = SP_FEBLEND(primitive);
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int primitive_n = filter->add_primitive(NR::NR_FILTER_BLEND);
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NR::FilterPrimitive *nr_primitive = filter->get_primitive(primitive_n);
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NR::FilterBlend *nr_blend = dynamic_cast<NR::FilterBlend*>(nr_primitive);
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g_assert(nr_blend != NULL);
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sp_filter_primitive_renderer_common(primitive, nr_primitive);
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nr_blend->set_mode(sp_blend->blend_mode);
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nr_blend->set_input(1, sp_blend->in2);
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c-file-style:"stroustrup"
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c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
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// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :
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src/sp-feblend.cpp
