svg-filters branch merged back to head

(bzr r1252)

1 files changed, 424 insertions, 0 deletions

diff --git a/src/sp-filter.cpp b/src/sp-filter.cpp
new file mode 100644
index 000000000..c3a4389c3
--- /dev/null
+++ b/src/sp-filter.cpp
@@ -0,0 +1,424 @@
+#define __SP_FILTER_CPP__
+
+/** \file
+ * SVG <filter> 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 "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 :