#define __SP_FILTER_CPP__ /** \file * SVG implementation. */ /* * Authors: * Hugo Rodrigues * * 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 "document.h" #include "sp-filter.h" #include "sp-filter-reference.h" #include "uri.h" #include "xml/repr.h" #define SP_MACROS_SILENT #include "macros.h" #define DEBUG_FILTER #ifdef DEBUG_FILTER # define debug(f, a...) { g_print("%s(%d) %s:", \ __FILE__,__LINE__,__FUNCTION__); \ g_print(f, ## a); \ g_print("\n"); \ } #else # define debug(f, a...) /**/ #endif /* * For debugging purposes only */ void printfilter(SPFilter *filter) { if(filter->filterUnits==SP_FILTER_UNITS_USERSPACEONUSE) g_print("filterUnits=SP_FILTER_UNITS_USERSPACEONUSE\n"); else if(filter->filterUnits==SP_FILTER_UNITS_OBJECTBOUNDINGBOX) g_print("filterUnits=SP_FILTER_UNITS_OBJECTBOUNDINGBOX\n"); else g_print("filterUnits=UNKNOWN!!!\n"); if(filter->primitiveUnits==SP_FILTER_UNITS_USERSPACEONUSE) g_print("primitiveUnits=SP_FILTER_UNITS_USERSPACEONUSE\n"); else if(filter->primitiveUnits==SP_FILTER_UNITS_OBJECTBOUNDINGBOX) g_print("primitiveUnits=SP_FILTER_UNITS_OBJECTBOUNDINGBOX\n"); else g_print("primitiveUnits=UNKNOWN!!!\n"); //TODO: print X, Y, W and H units g_print("x=%lf\n", filter->x.computed); g_print("y=%lf\n", filter->y.computed); g_print("width=%lf\n", filter->width.computed); g_print("height=%lf\n", filter->height.computed); g_print("filterRes=(%lf %lf)\n", filter->filterRes.getNumber(), filter->filterRes.getOptNumber()); } /* Filter base class */ static void sp_filter_class_init(SPFilterClass *klass); static void sp_filter_init(SPFilter *filter); static void sp_filter_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr); static void sp_filter_release(SPObject *object); static void sp_filter_set(SPObject *object, unsigned int key, gchar const *value); static void sp_filter_update(SPObject *object, SPCtx *ctx, guint flags); static Inkscape::XML::Node *sp_filter_write(SPObject *object, Inkscape::XML::Node *repr, guint flags); static void filter_ref_changed(SPObject *old_ref, SPObject *ref, SPFilter *filter); static void filter_ref_modified(SPObject *href, SPFilter *filter); static SPObjectClass *filter_parent_class; GType sp_filter_get_type() { static GType filter_type = 0; if (!filter_type) { GTypeInfo filter_info = { sizeof(SPFilterClass), NULL, NULL, (GClassInitFunc) sp_filter_class_init, NULL, NULL, sizeof(SPFilter), 16, (GInstanceInitFunc) sp_filter_init, NULL, /* value_table */ }; filter_type = g_type_register_static(SP_TYPE_OBJECT, "SPFilter", &filter_info, (GTypeFlags)0); } return filter_type; } static void sp_filter_class_init(SPFilterClass *klass) { SPObjectClass *sp_object_class = (SPObjectClass *)klass; filter_parent_class = (SPObjectClass*)g_type_class_peek_parent(klass); sp_object_class->build = sp_filter_build; sp_object_class->release = sp_filter_release; sp_object_class->write = sp_filter_write; sp_object_class->set = sp_filter_set; sp_object_class->update = sp_filter_update; } static void sp_filter_init(SPFilter *filter) { filter->href = new SPFilterReference(SP_OBJECT(filter)); filter->href->changedSignal().connect(sigc::bind(sigc::ptr_fun(filter_ref_changed), filter)); filter->x = 0; filter->y = 0; filter->width = 0; filter->height = 0; filter->filterUnits = SP_FILTER_UNITS_OBJECTBOUNDINGBOX; filter->primitiveUnits = SP_FILTER_UNITS_OBJECTBOUNDINGBOX; filter->filterUnits_set = FALSE; filter->primitiveUnits_set = FALSE; } /** * Reads the Inkscape::XML::Node, and initializes SPFilter 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_filter_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr) { debug("0x%p",object); if (((SPObjectClass *) filter_parent_class)->build) { ((SPObjectClass *) filter_parent_class)->build(object, document, repr); } //Read values of key attributes from XML nodes into object. sp_object_read_attr(object, "filterUnits"); sp_object_read_attr(object, "primitiveUnits"); sp_object_read_attr(object, "x"); sp_object_read_attr(object, "y"); sp_object_read_attr(object, "width"); sp_object_read_attr(object, "height"); sp_object_read_attr(object, "filterRes"); sp_object_read_attr(object, "xlink:href"); //is this necessary? sp_document_add_resource(document, "filter", object); } /** * Drops any allocated memory. */ static void sp_filter_release(SPObject *object) { debug("0x%p",object); SPFilter *filter = SP_FILTER(object); if (SP_OBJECT_DOCUMENT(object)) { /* Unregister ourselves */ sp_document_remove_resource(SP_OBJECT_DOCUMENT(object), "filter", SP_OBJECT(object)); } //TODO: release resources here //release href if (filter->href) { if (filter->href->getObject()) { sp_signal_disconnect_by_data(filter->href->getObject(), filter); } filter->href->detach(); delete filter->href; filter->href = NULL; } if (((SPObjectClass *) filter_parent_class)->release) ((SPObjectClass *) filter_parent_class)->release(object); } /** * Sets a specific value in the SPFilter. */ static void sp_filter_set(SPObject *object, unsigned int key, gchar const *value) { debug("0x%p %s(%u): '%s'",object, sp_attribute_name(key),key,value); SPFilter *filter = SP_FILTER(object); switch (key) { case SP_ATTR_FILTERUNITS: if (value) { if (!strcmp(value, "userSpaceOnUse")) { filter->filterUnits = SP_FILTER_UNITS_USERSPACEONUSE; } else { filter->filterUnits = SP_FILTER_UNITS_OBJECTBOUNDINGBOX; } filter->filterUnits_set = TRUE; } else { filter->filterUnits = SP_FILTER_UNITS_OBJECTBOUNDINGBOX; filter->filterUnits_set = FALSE; } object->requestModified(SP_OBJECT_MODIFIED_FLAG); break; case SP_ATTR_PRIMITIVEUNITS: if (value) { if (!strcmp(value, "userSpaceOnUse")) { filter->primitiveUnits = SP_FILTER_UNITS_USERSPACEONUSE; } else { filter->primitiveUnits = SP_FILTER_UNITS_OBJECTBOUNDINGBOX; } filter->primitiveUnits_set = TRUE; } else { filter->primitiveUnits = SP_FILTER_UNITS_OBJECTBOUNDINGBOX; filter->primitiveUnits_set = FALSE; } object->requestModified(SP_OBJECT_MODIFIED_FLAG); break; case SP_ATTR_X: filter->x.readOrUnset(value); object->requestModified(SP_OBJECT_MODIFIED_FLAG); break; case SP_ATTR_Y: filter->y.readOrUnset(value); object->requestModified(SP_OBJECT_MODIFIED_FLAG); break; case SP_ATTR_WIDTH: filter->width.readOrUnset(value); object->requestModified(SP_OBJECT_MODIFIED_FLAG); break; case SP_ATTR_HEIGHT: filter->height.readOrUnset(value); object->requestModified(SP_OBJECT_MODIFIED_FLAG); break; case SP_ATTR_FILTERRES: filter->filterRes.set(value); break; case SP_ATTR_XLINK_HREF: if (value) { try { filter->href->attach(Inkscape::URI(value)); } catch (Inkscape::BadURIException &e) { g_warning("%s", e.what()); filter->href->detach(); } } else { filter->href->detach(); } break; default: /* See if any parents need this value. */ if (((SPObjectClass *) filter_parent_class)->set) { ((SPObjectClass *) filter_parent_class)->set(object, key, value); } break; } } /** * Receives update notifications. */ static void sp_filter_update(SPObject *object, SPCtx *ctx, guint flags) { debug("0x%p",object); //SPFilter *filter = SP_FILTER(object); if (flags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG)) { /* do something to trigger redisplay, updates? */ } if (((SPObjectClass *) filter_parent_class)->update) { ((SPObjectClass *) filter_parent_class)->update(object, ctx, flags); } } /** * Writes its settings to an incoming repr object, if any. */ static Inkscape::XML::Node * sp_filter_write(SPObject *object, Inkscape::XML::Node *repr, guint flags) { debug("0x%p",object); SPFilter *filter = SP_FILTER(object); // Inkscape-only object, not copied during an "plain SVG" dump: /* if (flags & SP_OBJECT_WRITE_EXT) { if (repr) { // is this sane? repr->mergeFrom(SP_OBJECT_REPR(object), "id"); } else { repr = SP_OBJECT_REPR(object)->duplicate(); } } */ //FIXME: repr node is null at this point, // preventing plain svg save. Need to fix this. if ((flags & SP_OBJECT_WRITE_ALL) || filter->filterUnits_set) { switch (filter->filterUnits) { case SP_FILTER_UNITS_USERSPACEONUSE: repr->setAttribute("filterUnits", "userSpaceOnUse"); break; default: repr->setAttribute("filterUnits", "objectBoundingBox"); break; } } if ((flags & SP_OBJECT_WRITE_ALL) || filter->primitiveUnits_set) { switch (filter->primitiveUnits) { case SP_FILTER_UNITS_USERSPACEONUSE: repr->setAttribute("primitiveUnits", "userSpaceOnUse"); break; default: repr->setAttribute("primitiveUnits", "objectBoundingBox"); break; } } if (filter->x._set) { sp_repr_set_svg_double(repr, "x", filter->x.computed); } else { repr->setAttribute("x", NULL); } if (filter->y._set) { sp_repr_set_svg_double(repr, "y", filter->y.computed); } else { repr->setAttribute("y", NULL); } if (filter->width._set) { sp_repr_set_svg_double(repr, "width", filter->width.computed); } else { repr->setAttribute("width", NULL); } if (filter->height._set) { sp_repr_set_svg_double(repr, "height", filter->height.computed); } else { repr->setAttribute("height", NULL); } if (filter->filterRes._set) { char filterRes[32]; repr->setAttribute("filterRes", filter->filterRes.getValueString(filterRes)); } else { repr->setAttribute("filterRes", NULL); } if (filter->href->getURI()) { gchar *uri_string = filter->href->getURI()->toString(); repr->setAttribute("xlink:href", uri_string); g_free(uri_string); } if (((SPObjectClass *) filter_parent_class)->write) { ((SPObjectClass *) filter_parent_class)->write(object, repr, flags); } return repr; } /** * Gets called when the filter is (re)attached to another filter. */ static void filter_ref_changed(SPObject *old_ref, SPObject *ref, SPFilter *filter) { if (old_ref) { sp_signal_disconnect_by_data(old_ref, filter); } if ( SP_IS_FILTER(ref) && ref != filter ) { g_signal_connect(G_OBJECT(ref), "modified", G_CALLBACK(filter_ref_modified), filter); } filter_ref_modified(ref, filter); } static void filter_ref_modified(SPObject *href, SPFilter *filter) { SP_OBJECT(filter)->requestModified(SP_OBJECT_MODIFIED_FLAG); } /* 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:encoding=utf-8:textwidth=99 :