49ab18a25fcf7c25343d01f8e90d9e797a6c085a
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;
46 static int renderer;
48 GType
49 sp_feBlend_get_type()
50 {
51 static GType feBlend_type = 0;
53 if (!feBlend_type) {
54 GTypeInfo feBlend_info = {
55 sizeof(SPFeBlendClass),
56 NULL, NULL,
57 (GClassInitFunc) sp_feBlend_class_init,
58 NULL, NULL,
59 sizeof(SPFeBlend),
60 16,
61 (GInstanceInitFunc) sp_feBlend_init,
62 NULL, /* value_table */
63 };
64 feBlend_type = g_type_register_static(SP_TYPE_FILTER_PRIMITIVE, "SPFeBlend", &feBlend_info, (GTypeFlags)0);
65 }
66 return feBlend_type;
67 }
69 static void
70 sp_feBlend_class_init(SPFeBlendClass *klass)
71 {
72 SPObjectClass *sp_object_class = (SPObjectClass *)klass;
73 SPFilterPrimitiveClass *sp_primitive_class = (SPFilterPrimitiveClass *)klass;
75 feBlend_parent_class = (SPFilterPrimitiveClass*)g_type_class_peek_parent(klass);
77 sp_object_class->build = sp_feBlend_build;
78 sp_object_class->release = sp_feBlend_release;
79 sp_object_class->write = sp_feBlend_write;
80 sp_object_class->set = sp_feBlend_set;
81 sp_object_class->update = sp_feBlend_update;
83 sp_primitive_class->build_renderer = sp_feBlend_build_renderer;
84 }
86 static void
87 sp_feBlend_init(SPFeBlend *feBlend)
88 {
89 renderer = -1;
90 }
92 /**
93 * Reads the Inkscape::XML::Node, and initializes SPFeBlend variables. For this to get called,
94 * our name must be associated with a repr via "sp_object_type_register". Best done through
95 * sp-object-repr.cpp's repr_name_entries array.
96 */
97 static void
98 sp_feBlend_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
99 {
100 if (((SPObjectClass *) feBlend_parent_class)->build) {
101 ((SPObjectClass *) feBlend_parent_class)->build(object, document, repr);
102 }
104 /*LOAD ATTRIBUTES FROM REPR HERE*/
105 sp_object_read_attr(object, "mode");
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 switch(key) {
159 /*DEAL WITH SETTING ATTRIBUTES HERE*/
160 case SP_ATTR_MODE:
161 feBlend->blend_mode = sp_feBlend_readmode(value);
162 /*
163 if (renderer >= 0) {
164 NR::Filter *filter = SP_FILTER(object->parent)->_renderer;
165 NR::FilterBlend *blend = dynamic_cast<NR::FilterBlend*>(filter->get_primitive(renderer));
166 blend->set_mode(feBlend->blend_mode);
167 }
168 */
169 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
170 break;
171 default:
172 if (((SPObjectClass *) feBlend_parent_class)->set)
173 ((SPObjectClass *) feBlend_parent_class)->set(object, key, value);
174 break;
175 }
177 }
179 /**
180 * Receives update notifications.
181 */
182 static void
183 sp_feBlend_update(SPObject *object, SPCtx *ctx, guint flags)
184 {
185 if (flags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG)) {
186 sp_object_read_attr(object, "mode");
187 }
189 if (((SPObjectClass *) feBlend_parent_class)->update) {
190 ((SPObjectClass *) feBlend_parent_class)->update(object, ctx, flags);
191 }
192 }
194 /**
195 * Writes its settings to an incoming repr object, if any.
196 */
197 static Inkscape::XML::Node *
198 sp_feBlend_write(SPObject *object, Inkscape::XML::Node *repr, guint flags)
199 {
200 // Inkscape-only object, not copied during an "plain SVG" dump:
201 if (flags & SP_OBJECT_WRITE_EXT) {
202 if (repr) {
203 // is this sane?
204 // repr->mergeFrom(SP_OBJECT_REPR(object), "id");
205 } else {
206 repr = SP_OBJECT_REPR(object)->duplicate(NULL); // FIXME
207 }
208 }
210 if (((SPObjectClass *) feBlend_parent_class)->write) {
211 ((SPObjectClass *) feBlend_parent_class)->write(object, repr, flags);
212 }
214 return repr;
215 }
217 static void sp_feBlend_build_renderer(SPFilterPrimitive *primitive, NR::Filter *filter) {
218 g_assert(primitive != NULL);
219 g_assert(filter != NULL);
221 SPFeBlend *sp_blend = SP_FEBLEND(primitive);
223 int primitive_n = filter->add_primitive(NR::NR_FILTER_BLEND);
224 NR::FilterPrimitive *nr_primitive = filter->get_primitive(primitive_n);
225 NR::FilterBlend *nr_blend = dynamic_cast<NR::FilterBlend*>(nr_primitive);
226 g_assert(nr_blend != NULL);
228 sp_filter_primitive_renderer_common(primitive, nr_primitive);
230 nr_blend->set_mode(sp_blend->blend_mode);
232 renderer = primitive_n;
233 }
235 /*
236 Local Variables:
237 mode:c++
238 c-file-style:"stroustrup"
239 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
240 indent-tabs-mode:nil
241 fill-column:99
242 End:
243 */
244 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :