1 /** \file
2 * SVG <gaussianBlur> implementation.
3 *
4 */
5 /*
6 * Authors:
7 * Hugo Rodrigues <haa.rodrigues@gmail.com>
8 * Niko Kiirala <niko@kiirala.com>
9 * Abhishek Sharma
10 *
11 * Copyright (C) 2006,2007 Authors
12 *
13 * Released under GNU GPL, read the file 'COPYING' for more information
14 */
16 #ifdef HAVE_CONFIG_H
17 # include "config.h"
18 #endif
20 #include "attributes.h"
21 #include "svg/svg.h"
22 #include "sp-gaussian-blur.h"
23 #include "xml/repr.h"
25 #include "display/nr-filter.h"
26 #include "display/nr-filter-primitive.h"
27 #include "display/nr-filter-gaussian.h"
28 #include "display/nr-filter-types.h"
30 //#define SP_MACROS_SILENT
31 //#include "macros.h"
33 /* GaussianBlur base class */
35 static void sp_gaussianBlur_class_init(SPGaussianBlurClass *klass);
36 static void sp_gaussianBlur_init(SPGaussianBlur *gaussianBlur);
38 static void sp_gaussianBlur_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);
39 static void sp_gaussianBlur_release(SPObject *object);
40 static void sp_gaussianBlur_set(SPObject *object, unsigned int key, gchar const *value);
41 static void sp_gaussianBlur_update(SPObject *object, SPCtx *ctx, guint flags);
42 static Inkscape::XML::Node *sp_gaussianBlur_write(SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags);
43 static void sp_gaussianBlur_build_renderer(SPFilterPrimitive *primitive, Inkscape::Filters::Filter *filter);
45 static SPFilterPrimitiveClass *gaussianBlur_parent_class;
47 GType
48 sp_gaussianBlur_get_type()
49 {
50 static GType gaussianBlur_type = 0;
52 if (!gaussianBlur_type) {
53 GTypeInfo gaussianBlur_info = {
54 sizeof(SPGaussianBlurClass),
55 NULL, NULL,
56 (GClassInitFunc) sp_gaussianBlur_class_init,
57 NULL, NULL,
58 sizeof(SPGaussianBlur),
59 16,
60 (GInstanceInitFunc) sp_gaussianBlur_init,
61 NULL, /* value_table */
62 };
63 gaussianBlur_type = g_type_register_static(SP_TYPE_FILTER_PRIMITIVE, "SPGaussianBlur", &gaussianBlur_info, (GTypeFlags)0);
64 }
65 return gaussianBlur_type;
66 }
68 static void
69 sp_gaussianBlur_class_init(SPGaussianBlurClass *klass)
70 {
71 SPObjectClass *sp_object_class = (SPObjectClass *)klass;
72 SPFilterPrimitiveClass *sp_primitive_class = (SPFilterPrimitiveClass *)klass;
74 gaussianBlur_parent_class = (SPFilterPrimitiveClass *)g_type_class_peek_parent(klass);
76 sp_object_class->build = sp_gaussianBlur_build;
77 sp_object_class->release = sp_gaussianBlur_release;
78 sp_object_class->write = sp_gaussianBlur_write;
79 sp_object_class->set = sp_gaussianBlur_set;
80 sp_object_class->update = sp_gaussianBlur_update;
82 sp_primitive_class->build_renderer = sp_gaussianBlur_build_renderer;
83 }
85 static void
86 sp_gaussianBlur_init(SPGaussianBlur */*gaussianBlur*/)
87 {
88 }
90 /**
91 * Reads the Inkscape::XML::Node, and initializes SPGaussianBlur variables. For this to get called,
92 * our name must be associated with a repr via "sp_object_type_register". Best done through
93 * sp-object-repr.cpp's repr_name_entries array.
94 */
95 static void
96 sp_gaussianBlur_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
97 {
98 if (((SPObjectClass *) gaussianBlur_parent_class)->build) {
99 ((SPObjectClass *) gaussianBlur_parent_class)->build(object, document, repr);
100 }
102 object->readAttr( "stdDeviation" );
104 }
106 /**
107 * Drops any allocated memory.
108 */
109 static void
110 sp_gaussianBlur_release(SPObject *object)
111 {
113 if (((SPObjectClass *) gaussianBlur_parent_class)->release)
114 ((SPObjectClass *) gaussianBlur_parent_class)->release(object);
115 }
117 /**
118 * Sets a specific value in the SPGaussianBlur.
119 */
120 static void
121 sp_gaussianBlur_set(SPObject *object, unsigned int key, gchar const *value)
122 {
123 SPGaussianBlur *gaussianBlur = SP_GAUSSIANBLUR(object);
125 switch(key) {
126 case SP_ATTR_STDDEVIATION:
127 gaussianBlur->stdDeviation.set(value);
128 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
129 break;
130 default:
131 if (((SPObjectClass *) gaussianBlur_parent_class)->set)
132 ((SPObjectClass *) gaussianBlur_parent_class)->set(object, key, value);
133 break;
134 }
136 }
138 /**
139 * Receives update notifications.
140 */
141 static void
142 sp_gaussianBlur_update(SPObject *object, SPCtx *ctx, guint flags)
143 {
144 if (flags & SP_OBJECT_MODIFIED_FLAG) {
145 object->readAttr( "stdDeviation" );
146 }
148 if (((SPObjectClass *) gaussianBlur_parent_class)->update) {
149 ((SPObjectClass *) gaussianBlur_parent_class)->update(object, ctx, flags);
150 }
151 }
153 /**
154 * Writes its settings to an incoming repr object, if any.
155 */
156 static Inkscape::XML::Node *
157 sp_gaussianBlur_write(SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags)
158 {
159 /* TODO: Don't just clone, but create a new repr node and write all
160 * relevant values into it */
161 if (!repr) {
162 repr = SP_OBJECT_REPR(object)->duplicate(doc);
163 }
165 if (((SPObjectClass *) gaussianBlur_parent_class)->write) {
166 ((SPObjectClass *) gaussianBlur_parent_class)->write(object, doc, repr, flags);
167 }
169 return repr;
170 }
173 void sp_gaussianBlur_setDeviation(SPGaussianBlur *blur, float num)
174 {
175 blur->stdDeviation.setNumber(num);
176 }
177 void sp_gaussianBlur_setDeviation(SPGaussianBlur *blur, float num, float optnum)
178 {
179 blur->stdDeviation.setNumber(num);
180 blur->stdDeviation.setOptNumber(optnum);
181 }
183 static void sp_gaussianBlur_build_renderer(SPFilterPrimitive *primitive, Inkscape::Filters::Filter *filter) {
184 SPGaussianBlur *sp_blur = SP_GAUSSIANBLUR(primitive);
186 int handle = filter->add_primitive(Inkscape::Filters::NR_FILTER_GAUSSIANBLUR);
187 Inkscape::Filters::FilterPrimitive *nr_primitive = filter->get_primitive(handle);
188 Inkscape::Filters::FilterGaussian *nr_blur = dynamic_cast<Inkscape::Filters::FilterGaussian*>(nr_primitive);
190 sp_filter_primitive_renderer_common(primitive, nr_primitive);
192 gfloat num = sp_blur->stdDeviation.getNumber();
193 if (num >= 0.0) {
194 gfloat optnum = sp_blur->stdDeviation.getOptNumber();
195 if(optnum >= 0.0)
196 nr_blur->set_deviation((double) num, (double) optnum);
197 else
198 nr_blur->set_deviation((double) num);
199 }
200 }
202 /*
203 Local Variables:
204 mode:c++
205 c-file-style:"stroustrup"
206 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
207 indent-tabs-mode:nil
208 fill-column:99
209 End:
210 */
211 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :