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#define __SP_FEDISPLACEMENTMAP_CPP__
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* SVG <feDisplacementMap> implementation.
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* hugo Rodrigues <haa.rodrigues@gmail.com>
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* Copyright (C) 2006 Hugo Rodrigues
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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 "displacementmap.h"
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#include "display/nr-filter-displacement-map.h"
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#include "helper-fns.h"
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/* FeDisplacementMap base class */
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static void sp_feDisplacementMap_class_init(SPFeDisplacementMapClass *klass);
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static void sp_feDisplacementMap_init(SPFeDisplacementMap *feDisplacementMap);
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static void sp_feDisplacementMap_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);
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static void sp_feDisplacementMap_release(SPObject *object);
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static void sp_feDisplacementMap_set(SPObject *object, unsigned int key, gchar const *value);
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static void sp_feDisplacementMap_update(SPObject *object, SPCtx *ctx, guint flags);
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static void sp_feDisplacementMap_build_renderer(SPFilterPrimitive *primitive, NR::Filter *filter);
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static Inkscape::XML::Node *sp_feDisplacementMap_write(SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags);
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static SPFilterPrimitiveClass *feDisplacementMap_parent_class;
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sp_feDisplacementMap_get_type()
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static GType feDisplacementMap_type = 0;
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if (!feDisplacementMap_type) {
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GTypeInfo feDisplacementMap_info = {
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sizeof(SPFeDisplacementMapClass),
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(GClassInitFunc) sp_feDisplacementMap_class_init,
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sizeof(SPFeDisplacementMap),
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(GInstanceInitFunc) sp_feDisplacementMap_init,
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NULL, /* value_table */
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feDisplacementMap_type = g_type_register_static(SP_TYPE_FILTER_PRIMITIVE, "SPFeDisplacementMap", &feDisplacementMap_info, (GTypeFlags)0);
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return feDisplacementMap_type;
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sp_feDisplacementMap_class_init(SPFeDisplacementMapClass *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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feDisplacementMap_parent_class = (SPFilterPrimitiveClass*)g_type_class_peek_parent(klass);
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sp_object_class->build = sp_feDisplacementMap_build;
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sp_object_class->release = sp_feDisplacementMap_release;
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sp_object_class->write = sp_feDisplacementMap_write;
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sp_object_class->set = sp_feDisplacementMap_set;
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sp_object_class->update = sp_feDisplacementMap_update;
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sp_primitive_class->build_renderer = sp_feDisplacementMap_build_renderer;
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sp_feDisplacementMap_init(SPFeDisplacementMap *feDisplacementMap)
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feDisplacementMap->scale=0;
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feDisplacementMap->xChannelSelector = DISPLACEMENTMAP_CHANNEL_ALPHA;
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feDisplacementMap->yChannelSelector = DISPLACEMENTMAP_CHANNEL_ALPHA;
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feDisplacementMap->in2 = NR::NR_FILTER_SLOT_NOT_SET;
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* Reads the Inkscape::XML::Node, and initializes SPFeDisplacementMap 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_feDisplacementMap_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
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if (((SPObjectClass *) feDisplacementMap_parent_class)->build) {
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((SPObjectClass *) feDisplacementMap_parent_class)->build(object, document, repr);
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/*LOAD ATTRIBUTES FROM REPR HERE*/
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sp_object_read_attr(object, "scale");
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sp_object_read_attr(object, "in2");
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sp_object_read_attr(object, "xChannelSelector");
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sp_object_read_attr(object, "yChannelSelector");
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* Drops any allocated memory.
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sp_feDisplacementMap_release(SPObject *object)
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if (((SPObjectClass *) feDisplacementMap_parent_class)->release)
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((SPObjectClass *) feDisplacementMap_parent_class)->release(object);
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static FilterDisplacementMapChannelSelector sp_feDisplacementMap_readChannelSelector(gchar const *value)
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if (!value) return DISPLACEMENTMAP_CHANNEL_ALPHA;
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return DISPLACEMENTMAP_CHANNEL_RED;
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return DISPLACEMENTMAP_CHANNEL_GREEN;
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return DISPLACEMENTMAP_CHANNEL_BLUE;
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return DISPLACEMENTMAP_CHANNEL_ALPHA;
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g_warning("Invalid attribute for Channel Selector. Valid modes are 'R', 'G', 'B' or 'A'");
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return DISPLACEMENTMAP_CHANNEL_ALPHA; //default is Alpha Channel
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* Sets a specific value in the SPFeDisplacementMap.
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sp_feDisplacementMap_set(SPObject *object, unsigned int key, gchar const *value)
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SPFeDisplacementMap *feDisplacementMap = SP_FEDISPLACEMENTMAP(object);
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(void)feDisplacementMap;
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FilterDisplacementMapChannelSelector read_selector;
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/*DEAL WITH SETTING ATTRIBUTES HERE*/
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case SP_ATTR_XCHANNELSELECTOR:
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read_selector = sp_feDisplacementMap_readChannelSelector(value);
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if (read_selector != feDisplacementMap->xChannelSelector){
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feDisplacementMap->xChannelSelector = read_selector;
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object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
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case SP_ATTR_YCHANNELSELECTOR:
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read_selector = sp_feDisplacementMap_readChannelSelector(value);
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if (read_selector != feDisplacementMap->yChannelSelector){
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feDisplacementMap->yChannelSelector = read_selector;
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object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
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read_num = helperfns_read_number(value);
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if (read_num != feDisplacementMap->scale) {
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feDisplacementMap->scale = read_num;
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object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
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input = sp_filter_primitive_read_in(feDisplacementMap, value);
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if (input != feDisplacementMap->in2) {
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feDisplacementMap->in2 = input;
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object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
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if (((SPObjectClass *) feDisplacementMap_parent_class)->set)
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((SPObjectClass *) feDisplacementMap_parent_class)->set(object, key, value);
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* Receives update notifications.
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sp_feDisplacementMap_update(SPObject *object, SPCtx *ctx, guint flags)
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if (flags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG |
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SP_OBJECT_VIEWPORT_MODIFIED_FLAG)) {
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/* do something to trigger redisplay, updates? */
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if (((SPObjectClass *) feDisplacementMap_parent_class)->update) {
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((SPObjectClass *) feDisplacementMap_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_feDisplacementMap_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 *) feDisplacementMap_parent_class)->write) {
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((SPObjectClass *) feDisplacementMap_parent_class)->write(object, doc, repr, flags);
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static void sp_feDisplacementMap_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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SPFeDisplacementMap *sp_displacement_map = SP_FEDISPLACEMENTMAP(primitive);
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int primitive_n = filter->add_primitive(NR::NR_FILTER_DISPLACEMENTMAP);
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NR::FilterPrimitive *nr_primitive = filter->get_primitive(primitive_n);
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NR::FilterDisplacementMap *nr_displacement_map = dynamic_cast<NR::FilterDisplacementMap*>(nr_primitive);
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g_assert(nr_displacement_map != NULL);
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sp_filter_primitive_renderer_common(primitive, nr_primitive);
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nr_displacement_map->set_input(1, sp_displacement_map->in2);
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nr_displacement_map->set_scale(sp_displacement_map->scale);
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nr_displacement_map->set_channel_selector(0, sp_displacement_map->xChannelSelector);
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nr_displacement_map->set_channel_selector(1, sp_displacement_map->yChannelSelector);
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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 :