src/filters/merge.cpp

	merge.cpp revision a4030d5ca449e7e384bc699cd249ee704faaeab0
#define __SP_FEMERGE_CPP__

/** \file
 * SVG <feMerge> implementation.
 *
 */
/*
 * Authors:
 *   hugo Rodrigues <haa.rodrigues@gmail.com>
 *
 * Copyright (C) 2006 Hugo Rodrigues
 *
 * Released under GNU GPL, read the file 'COPYING' for more information
 */

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#include "attributes.h"
#include "svg/svg.h"
#include "xml/repr.h"

#include "merge.h"
#include "mergenode.h"
#include "display/nr-filter-merge.h"

/* FeMerge base class */

static void sp_feMerge_class_init(SPFeMergeClass *klass);
static void sp_feMerge_init(SPFeMerge *feMerge);

static void sp_feMerge_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);
static void sp_feMerge_release(SPObject *object);
static void sp_feMerge_set(SPObject *object, unsigned int key, gchar const *value);
static void sp_feMerge_update(SPObject *object, SPCtx *ctx, guint flags);
static Inkscape::XML::Node *sp_feMerge_write(SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags);
static void sp_feMerge_build_renderer(SPFilterPrimitive *primitive, Inkscape::Filters::Filter *filter);

static SPFilterPrimitiveClass *feMerge_parent_class;

GType
sp_feMerge_get_type()
{
    static GType feMerge_type = 0;

    if (!feMerge_type) {
        GTypeInfo feMerge_info = {
            sizeof(SPFeMergeClass),
            NULL, NULL,
            (GClassInitFunc) sp_feMerge_class_init,
            NULL, NULL,
            sizeof(SPFeMerge),
            16,
            (GInstanceInitFunc) sp_feMerge_init,
            NULL,    /* value_table */
        };
        feMerge_type = g_type_register_static(SP_TYPE_FILTER_PRIMITIVE, "SPFeMerge", &feMerge_info, (GTypeFlags)0);
    }
    return feMerge_type;
}

static void
sp_feMerge_class_init(SPFeMergeClass *klass)
{
    SPObjectClass *sp_object_class = (SPObjectClass *)klass;
    SPFilterPrimitiveClass *sp_primitive_class = (SPFilterPrimitiveClass *)klass;

    feMerge_parent_class = (SPFilterPrimitiveClass*)g_type_class_peek_parent(klass);

    sp_object_class->build = sp_feMerge_build;
    sp_object_class->release = sp_feMerge_release;
    sp_object_class->write = sp_feMerge_write;
    sp_object_class->set = sp_feMerge_set;
    sp_object_class->update = sp_feMerge_update;

    sp_primitive_class->build_renderer = sp_feMerge_build_renderer;
}

static void
sp_feMerge_init(SPFeMerge */*feMerge*/)
{
}

/**
 * Reads the Inkscape::XML::Node, and initializes SPFeMerge 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.
 */
static void
sp_feMerge_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
{
    if (((SPObjectClass *) feMerge_parent_class)->build) {
        ((SPObjectClass *) feMerge_parent_class)->build(object, document, repr);
    }

    /*LOAD ATTRIBUTES FROM REPR HERE*/
}

/**
 * Drops any allocated memory.
 */
static void
sp_feMerge_release(SPObject *object)
{
    if (((SPObjectClass *) feMerge_parent_class)->release)
        ((SPObjectClass *) feMerge_parent_class)->release(object);
}

/**
 * Sets a specific value in the SPFeMerge.
 */
static void
sp_feMerge_set(SPObject *object, unsigned int key, gchar const *value)
{
    SPFeMerge *feMerge = SP_FEMERGE(object);
    (void)feMerge;

    switch(key) {
    /*DEAL WITH SETTING ATTRIBUTES HERE*/
        default:
            if (((SPObjectClass *) feMerge_parent_class)->set)
                ((SPObjectClass *) feMerge_parent_class)->set(object, key, value);
            break;
    }

}

/**
 * Receives update notifications.
 */
static void
sp_feMerge_update(SPObject *object, SPCtx *ctx, guint flags)
{
    if (flags & SP_OBJECT_MODIFIED_FLAG) {
        object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
    }

    if (((SPObjectClass *) feMerge_parent_class)->update) {
        ((SPObjectClass *) feMerge_parent_class)->update(object, ctx, flags);
    }
}

/**
 * Writes its settings to an incoming repr object, if any.
 */
static Inkscape::XML::Node *
sp_feMerge_write(SPObject *object, 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. And child nodes, too! */
    if (!repr) {
        repr = SP_OBJECT_REPR(object)->duplicate(doc);
    }


    if (((SPObjectClass *) feMerge_parent_class)->write) {
        ((SPObjectClass *) feMerge_parent_class)->write(object, doc, repr, flags);
    }

    return repr;
}

static void sp_feMerge_build_renderer(SPFilterPrimitive *primitive, Inkscape::Filters::Filter *filter) {
    g_assert(primitive != NULL);
    g_assert(filter != NULL);

    SPFeMerge *sp_merge = SP_FEMERGE(primitive);
    (void)sp_merge;

    int primitive_n = filter->add_primitive(Inkscape::Filters::NR_FILTER_MERGE);
    Inkscape::Filters::FilterPrimitive *nr_primitive = filter->get_primitive(primitive_n);
    Inkscape::Filters::FilterMerge *nr_merge = dynamic_cast<Inkscape::Filters::FilterMerge*>(nr_primitive);
    g_assert(nr_merge != NULL);

    sp_filter_primitive_renderer_common(primitive, nr_primitive);

    SPObject *input = primitive->children;
    int in_nr = 0;
    while (input) {
        if (SP_IS_FEMERGENODE(input)) {
            SPFeMergeNode *node = SP_FEMERGENODE(input);
            nr_merge->set_input(in_nr, node->input);
            in_nr++;
        }
        input = input->next;
    }
}


/*
  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 :