1 #define __SP_FEBLEND_CPP__
3 /** \file
4 * SVG <feBlend> implementation.
5 *
6 */
7 /*
8 * Authors:
9 * Hugo Rodrigues <haa.rodrigues@gmail.com>
10 * Niko Kiirala <niko@kiirala.com>
11 *
12 * Copyright (C) 2006,2007 authors
13 *
14 * Released under GNU GPL, read the file 'COPYING' for more information
15 */
17 #ifdef HAVE_CONFIG_H
18 # include "config.h"
19 #endif
21 #include <string.h>
23 #include "attributes.h"
24 #include "svg/svg.h"
25 #include "sp-feblend.h"
26 #include "xml/repr.h"
28 #include "display/nr-filter.h"
29 #include "display/nr-filter-primitive.h"
30 #include "display/nr-filter-blend.h"
31 #include "display/nr-filter-types.h"
33 /* FeBlend base class */
35 static void sp_feBlend_class_init(SPFeBlendClass *klass);
36 static void sp_feBlend_init(SPFeBlend *feBlend);
38 static void sp_feBlend_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);
39 static void sp_feBlend_release(SPObject *object);
40 static void sp_feBlend_set(SPObject *object, unsigned int key, gchar const *value);
41 static void sp_feBlend_update(SPObject *object, SPCtx *ctx, guint flags);
42 static Inkscape::XML::Node *sp_feBlend_write(SPObject *object, Inkscape::XML::Node *repr, guint flags);
43 static void sp_feBlend_build_renderer(SPFilterPrimitive *sp_prim, NR::Filter *filter);
45 static SPFilterPrimitiveClass *feBlend_parent_class;
47 GType
48 sp_feBlend_get_type()
49 {
50 static GType feBlend_type = 0;
52 if (!feBlend_type) {
53 GTypeInfo feBlend_info = {
54 sizeof(SPFeBlendClass),
55 NULL, NULL,
56 (GClassInitFunc) sp_feBlend_class_init,
57 NULL, NULL,
58 sizeof(SPFeBlend),
59 16,
60 (GInstanceInitFunc) sp_feBlend_init,
61 NULL, /* value_table */
62 };
63 feBlend_type = g_type_register_static(SP_TYPE_FILTER_PRIMITIVE, "SPFeBlend", &feBlend_info, (GTypeFlags)0);
64 }
65 return feBlend_type;
66 }
68 static void
69 sp_feBlend_class_init(SPFeBlendClass *klass)
70 {
71 SPObjectClass *sp_object_class = (SPObjectClass *)klass;
72 SPFilterPrimitiveClass *sp_primitive_class = (SPFilterPrimitiveClass *)klass;
74 feBlend_parent_class = (SPFilterPrimitiveClass*)g_type_class_peek_parent(klass);
76 sp_object_class->build = sp_feBlend_build;
77 sp_object_class->release = sp_feBlend_release;
78 sp_object_class->write = sp_feBlend_write;
79 sp_object_class->set = sp_feBlend_set;
80 sp_object_class->update = sp_feBlend_update;
82 sp_primitive_class->build_renderer = sp_feBlend_build_renderer;
83 }
85 static void
86 sp_feBlend_init(SPFeBlend *feBlend)
87 {
88 feBlend->in2 = NR::NR_FILTER_SLOT_NOT_SET;
89 }
91 /**
92 * Reads the Inkscape::XML::Node, and initializes SPFeBlend variables. For this to get called,
93 * our name must be associated with a repr via "sp_object_type_register". Best done through
94 * sp-object-repr.cpp's repr_name_entries array.
95 */
96 static void
97 sp_feBlend_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
98 {
99 if (((SPObjectClass *) feBlend_parent_class)->build) {
100 ((SPObjectClass *) feBlend_parent_class)->build(object, document, repr);
101 }
103 /*LOAD ATTRIBUTES FROM REPR HERE*/
104 sp_object_read_attr(object, "mode");
105 sp_object_read_attr(object, "in2");
106 }
108 /**
109 * Drops any allocated memory.
110 */
111 static void
112 sp_feBlend_release(SPObject *object)
113 {
114 if (((SPObjectClass *) feBlend_parent_class)->release)
115 ((SPObjectClass *) feBlend_parent_class)->release(object);
116 }
118 static NR::FilterBlendMode sp_feBlend_readmode(gchar const *value)
119 {
120 if (!value) return NR::BLEND_NORMAL;
121 switch (value[0]) {
122 case 'n':
123 if (strncmp(value, "normal", 6) == 0)
124 return NR::BLEND_NORMAL;
125 break;
126 case 'm':
127 if (strncmp(value, "multiply", 8) == 0)
128 return NR::BLEND_MULTIPLY;
129 break;
130 case 's':
131 if (strncmp(value, "screen", 6) == 0)
132 return NR::BLEND_SCREEN;
133 break;
134 case 'd':
135 if (strncmp(value, "darken", 6) == 0)
136 return NR::BLEND_DARKEN;
137 break;
138 case 'l':
139 if (strncmp(value, "lighten", 7) == 0)
140 return NR::BLEND_LIGHTEN;
141 break;
142 default:
143 // do nothing by default
144 break;
145 }
146 return NR::BLEND_NORMAL;
147 }
149 /**
150 * Sets a specific value in the SPFeBlend.
151 */
152 static void
153 sp_feBlend_set(SPObject *object, unsigned int key, gchar const *value)
154 {
155 SPFeBlend *feBlend = SP_FEBLEND(object);
156 (void)feBlend;
158 NR::FilterBlendMode mode;
159 int input;
160 switch(key) {
161 /*DEAL WITH SETTING ATTRIBUTES HERE*/
162 case SP_ATTR_MODE:
163 mode = sp_feBlend_readmode(value);
164 if (mode != feBlend->blend_mode) {
165 feBlend->blend_mode = mode;
166 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
167 }
168 break;
169 case SP_ATTR_IN2:
170 input = sp_filter_primitive_read_in(feBlend, value);
171 if (input != feBlend->in2) {
172 feBlend->in2 = input;
173 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
174 }
175 break;
176 default:
177 if (((SPObjectClass *) feBlend_parent_class)->set)
178 ((SPObjectClass *) feBlend_parent_class)->set(object, key, value);
179 break;
180 }
182 }
184 /**
185 * Receives update notifications.
186 */
187 static void
188 sp_feBlend_update(SPObject *object, SPCtx *ctx, guint flags)
189 {
190 if (flags & SP_OBJECT_MODIFIED_FLAG) {
191 sp_object_read_attr(object, "mode");
192 sp_object_read_attr(object, "in2");
193 }
195 if (((SPObjectClass *) feBlend_parent_class)->update) {
196 ((SPObjectClass *) feBlend_parent_class)->update(object, ctx, flags);
197 }
198 }
200 /**
201 * Writes its settings to an incoming repr object, if any.
202 */
203 static Inkscape::XML::Node *
204 sp_feBlend_write(SPObject *object, Inkscape::XML::Node *repr, guint flags)
205 {
206 // Inkscape-only object, not copied during an "plain SVG" dump:
207 if (flags & SP_OBJECT_WRITE_EXT) {
208 if (repr) {
209 // is this sane?
210 // repr->mergeFrom(SP_OBJECT_REPR(object), "id");
211 } else {
212 repr = SP_OBJECT_REPR(object)->duplicate(NULL); // FIXME
213 }
214 }
216 if (((SPObjectClass *) feBlend_parent_class)->write) {
217 ((SPObjectClass *) feBlend_parent_class)->write(object, repr, flags);
218 }
220 return repr;
221 }
223 static void sp_feBlend_build_renderer(SPFilterPrimitive *primitive, NR::Filter *filter) {
224 g_assert(primitive != NULL);
225 g_assert(filter != NULL);
227 SPFeBlend *sp_blend = SP_FEBLEND(primitive);
229 int primitive_n = filter->add_primitive(NR::NR_FILTER_BLEND);
230 NR::FilterPrimitive *nr_primitive = filter->get_primitive(primitive_n);
231 NR::FilterBlend *nr_blend = dynamic_cast<NR::FilterBlend*>(nr_primitive);
232 g_assert(nr_blend != NULL);
234 sp_filter_primitive_renderer_common(primitive, nr_primitive);
236 nr_blend->set_mode(sp_blend->blend_mode);
237 nr_blend->set_input(1, sp_blend->in2);
238 }
240 /*
241 Local Variables:
242 mode:c++
243 c-file-style:"stroustrup"
244 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
245 indent-tabs-mode:nil
246 fill-column:99
247 End:
248 */
249 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :