11d101bd63b75b6eb8b7ba8151806b589312e676
1 #define __SP_FECOMPOSITE_CPP__
3 /** \file
4 * SVG <feComposite> implementation.
5 *
6 */
7 /*
8 * Authors:
9 * hugo Rodrigues <haa.rodrigues@gmail.com>
10 *
11 * Copyright (C) 2006 Hugo Rodrigues
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-fecomposite.h"
23 #include "helper-fns.h"
24 #include "xml/repr.h"
25 #include "display/nr-filter-composite.h"
27 /* FeComposite base class */
29 static void sp_feComposite_class_init(SPFeCompositeClass *klass);
30 static void sp_feComposite_init(SPFeComposite *feComposite);
32 static void sp_feComposite_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);
33 static void sp_feComposite_release(SPObject *object);
34 static void sp_feComposite_set(SPObject *object, unsigned int key, gchar const *value);
35 static void sp_feComposite_update(SPObject *object, SPCtx *ctx, guint flags);
36 static Inkscape::XML::Node *sp_feComposite_write(SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags);
37 static void sp_feComposite_build_renderer(SPFilterPrimitive *primitive, NR::Filter *filter);
39 static SPFilterPrimitiveClass *feComposite_parent_class;
41 GType
42 sp_feComposite_get_type()
43 {
44 static GType feComposite_type = 0;
46 if (!feComposite_type) {
47 GTypeInfo feComposite_info = {
48 sizeof(SPFeCompositeClass),
49 NULL, NULL,
50 (GClassInitFunc) sp_feComposite_class_init,
51 NULL, NULL,
52 sizeof(SPFeComposite),
53 16,
54 (GInstanceInitFunc) sp_feComposite_init,
55 NULL, /* value_table */
56 };
57 feComposite_type = g_type_register_static(SP_TYPE_FILTER_PRIMITIVE, "SPFeComposite", &feComposite_info, (GTypeFlags)0);
58 }
59 return feComposite_type;
60 }
62 static void
63 sp_feComposite_class_init(SPFeCompositeClass *klass)
64 {
65 SPObjectClass *sp_object_class = (SPObjectClass *)klass;
66 SPFilterPrimitiveClass *sp_primitive_class = (SPFilterPrimitiveClass *)klass;
68 feComposite_parent_class = (SPFilterPrimitiveClass*)g_type_class_peek_parent(klass);
70 sp_object_class->build = sp_feComposite_build;
71 sp_object_class->release = sp_feComposite_release;
72 sp_object_class->write = sp_feComposite_write;
73 sp_object_class->set = sp_feComposite_set;
74 sp_object_class->update = sp_feComposite_update;
76 sp_primitive_class->build_renderer = sp_feComposite_build_renderer;
77 }
79 static void
80 sp_feComposite_init(SPFeComposite *feComposite)
81 {
82 feComposite->composite_operator = COMPOSITE_DEFAULT;
83 feComposite->k1 = 0;
84 feComposite->k2 = 0;
85 feComposite->k3 = 0;
86 feComposite->k4 = 0;
87 feComposite->in2 = NR::NR_FILTER_SLOT_NOT_SET;
88 }
90 /**
91 * Reads the Inkscape::XML::Node, and initializes SPFeComposite 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_feComposite_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
97 {
98 if (((SPObjectClass *) feComposite_parent_class)->build) {
99 ((SPObjectClass *) feComposite_parent_class)->build(object, document, repr);
100 }
102 SPFeComposite *composite = SP_FECOMPOSITE(object);
104 sp_object_read_attr(object, "operator");
105 if (composite->composite_operator == COMPOSITE_ARITHMETIC) {
106 sp_object_read_attr(object, "k1");
107 sp_object_read_attr(object, "k2");
108 sp_object_read_attr(object, "k3");
109 sp_object_read_attr(object, "k4");
110 }
111 sp_object_read_attr(object, "in2");
112 }
114 /**
115 * Drops any allocated memory.
116 */
117 static void
118 sp_feComposite_release(SPObject *object)
119 {
120 if (((SPObjectClass *) feComposite_parent_class)->release)
121 ((SPObjectClass *) feComposite_parent_class)->release(object);
122 }
124 static FeCompositeOperator
125 sp_feComposite_read_operator(gchar const *value) {
126 if (!value) return COMPOSITE_DEFAULT;
128 if (strcmp(value, "over") == 0) return COMPOSITE_OVER;
129 else if (strcmp(value, "in") == 0) return COMPOSITE_IN;
130 else if (strcmp(value, "out") == 0) return COMPOSITE_OUT;
131 else if (strcmp(value, "atop") == 0) return COMPOSITE_ATOP;
132 else if (strcmp(value, "xor") == 0) return COMPOSITE_XOR;
133 else if (strcmp(value, "arithmetic") == 0) return COMPOSITE_ARITHMETIC;
134 return COMPOSITE_DEFAULT;
135 }
137 /**
138 * Sets a specific value in the SPFeComposite.
139 */
140 static void
141 sp_feComposite_set(SPObject *object, unsigned int key, gchar const *value)
142 {
143 SPFeComposite *feComposite = SP_FECOMPOSITE(object);
144 (void)feComposite;
146 int input;
147 FeCompositeOperator op;
148 double k_n;
149 switch(key) {
150 /*DEAL WITH SETTING ATTRIBUTES HERE*/
151 case SP_ATTR_OPERATOR:
152 op = sp_feComposite_read_operator(value);
153 if (op != feComposite->composite_operator) {
154 feComposite->composite_operator = op;
155 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
156 }
157 break;
159 case SP_ATTR_K1:
160 k_n = helperfns_read_number(value);
161 if (k_n != feComposite->k1) {
162 feComposite->k1 = k_n;
163 if (feComposite->composite_operator == COMPOSITE_ARITHMETIC)
164 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
165 }
166 break;
168 case SP_ATTR_K2:
169 k_n = helperfns_read_number(value);
170 if (k_n != feComposite->k2) {
171 feComposite->k2 = k_n;
172 if (feComposite->composite_operator == COMPOSITE_ARITHMETIC)
173 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
174 }
175 break;
177 case SP_ATTR_K3:
178 k_n = helperfns_read_number(value);
179 if (k_n != feComposite->k3) {
180 feComposite->k3 = k_n;
181 if (feComposite->composite_operator == COMPOSITE_ARITHMETIC)
182 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
183 }
184 break;
186 case SP_ATTR_K4:
187 k_n = helperfns_read_number(value);
188 if (k_n != feComposite->k4) {
189 feComposite->k4 = k_n;
190 if (feComposite->composite_operator == COMPOSITE_ARITHMETIC)
191 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
192 }
193 break;
195 case SP_ATTR_IN2:
196 input = sp_filter_primitive_read_in(feComposite, value);
197 if (input != feComposite->in2) {
198 feComposite->in2 = input;
199 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
200 }
201 break;
203 default:
204 if (((SPObjectClass *) feComposite_parent_class)->set)
205 ((SPObjectClass *) feComposite_parent_class)->set(object, key, value);
206 break;
207 }
209 }
211 /**
212 * Receives update notifications.
213 */
214 static void
215 sp_feComposite_update(SPObject *object, SPCtx *ctx, guint flags)
216 {
217 if (flags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG |
218 SP_OBJECT_VIEWPORT_MODIFIED_FLAG)) {
220 /* do something to trigger redisplay, updates? */
222 }
224 if (((SPObjectClass *) feComposite_parent_class)->update) {
225 ((SPObjectClass *) feComposite_parent_class)->update(object, ctx, flags);
226 }
227 }
229 /**
230 * Writes its settings to an incoming repr object, if any.
231 */
232 static Inkscape::XML::Node *
233 sp_feComposite_write(SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags)
234 {
235 // Inkscape-only object, not copied during an "plain SVG" dump:
236 if (flags & SP_OBJECT_WRITE_EXT) {
237 if (repr) {
238 // is this sane?
239 //repr->mergeFrom(SP_OBJECT_REPR(object), "id");
240 } else {
241 repr = SP_OBJECT_REPR(object)->duplicate(doc);
242 }
243 }
245 if (((SPObjectClass *) feComposite_parent_class)->write) {
246 ((SPObjectClass *) feComposite_parent_class)->write(object, doc, repr, flags);
247 }
249 return repr;
250 }
252 static void sp_feComposite_build_renderer(SPFilterPrimitive *primitive, NR::Filter *filter) {
253 g_assert(primitive != NULL);
254 g_assert(filter != NULL);
256 SPFeComposite *sp_composite = SP_FECOMPOSITE(primitive);
258 int primitive_n = filter->add_primitive(NR::NR_FILTER_COMPOSITE);
259 NR::FilterPrimitive *nr_primitive = filter->get_primitive(primitive_n);
260 NR::FilterComposite *nr_composite = dynamic_cast<NR::FilterComposite*>(nr_primitive);
261 g_assert(nr_composite != NULL);
263 sp_filter_primitive_renderer_common(primitive, nr_primitive);
265 nr_composite->set_operator(sp_composite->composite_operator);
266 nr_composite->set_input(1, sp_composite->in2);
267 if (sp_composite->composite_operator == COMPOSITE_ARITHMETIC) {
268 nr_composite->set_arithmetic(sp_composite->k1, sp_composite->k2,
269 sp_composite->k3, sp_composite->k4);
270 }
271 }
274 /*
275 Local Variables:
276 mode:c++
277 c-file-style:"stroustrup"
278 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
279 indent-tabs-mode:nil
280 fill-column:99
281 End:
282 */
283 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :