1 #define __SP_FECOMPONENTTRANSFER_CPP__
3 /** \file
4 * SVG <feComponentTransfer> 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 <string.h>
22 #include "attributes.h"
23 #include "svg/svg.h"
24 #include "sp-fecomponenttransfer.h"
25 #include "xml/repr.h"
26 #include "display/nr-filter-component-transfer.h"
28 /* FeComponentTransfer base class */
30 static void sp_feComponentTransfer_class_init(SPFeComponentTransferClass *klass);
31 static void sp_feComponentTransfer_init(SPFeComponentTransfer *feComponentTransfer);
33 static void sp_feComponentTransfer_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);
34 static void sp_feComponentTransfer_release(SPObject *object);
35 static void sp_feComponentTransfer_set(SPObject *object, unsigned int key, gchar const *value);
36 static void sp_feComponentTransfer_update(SPObject *object, SPCtx *ctx, guint flags);
37 static Inkscape::XML::Node *sp_feComponentTransfer_write(SPObject *object, Inkscape::XML::Node *repr, guint flags);
39 static SPFilterPrimitiveClass *feComponentTransfer_parent_class;
41 GType
42 sp_feComponentTransfer_get_type()
43 {
44 static GType feComponentTransfer_type = 0;
46 if (!feComponentTransfer_type) {
47 GTypeInfo feComponentTransfer_info = {
48 sizeof(SPFeComponentTransferClass),
49 NULL, NULL,
50 (GClassInitFunc) sp_feComponentTransfer_class_init,
51 NULL, NULL,
52 sizeof(SPFeComponentTransfer),
53 16,
54 (GInstanceInitFunc) sp_feComponentTransfer_init,
55 NULL, /* value_table */
56 };
57 feComponentTransfer_type = g_type_register_static(SP_TYPE_FILTER_PRIMITIVE, "SPFeComponentTransfer", &feComponentTransfer_info, (GTypeFlags)0);
58 }
59 return feComponentTransfer_type;
60 }
62 static void
63 sp_feComponentTransfer_class_init(SPFeComponentTransferClass *klass)
64 {
65 SPObjectClass *sp_object_class = (SPObjectClass *)klass;
67 feComponentTransfer_parent_class = (SPFilterPrimitiveClass*)g_type_class_peek_parent(klass);
69 sp_object_class->build = sp_feComponentTransfer_build;
70 sp_object_class->release = sp_feComponentTransfer_release;
71 sp_object_class->write = sp_feComponentTransfer_write;
72 sp_object_class->set = sp_feComponentTransfer_set;
73 sp_object_class->update = sp_feComponentTransfer_update;
74 }
76 static void
77 sp_feComponentTransfer_init(SPFeComponentTransfer *feComponentTransfer)
78 {
79 //Setting default values:
80 //TODO: tableValues = "" (empty list);
81 feComponentTransfer->slope = 1;
82 feComponentTransfer->intercept = 0;
83 feComponentTransfer->amplitude = 1;
84 feComponentTransfer->exponent = 1;
85 feComponentTransfer->offset = 0;
86 // feComponentTransfer->type = NR::COMPONENTTRANSFER_TYPE_ERROR;
87 }
89 /**
90 * Reads the Inkscape::XML::Node, and initializes SPFeComponentTransfer variables. For this to get called,
91 * our name must be associated with a repr via "sp_object_type_register". Best done through
92 * sp-object-repr.cpp's repr_name_entries array.
93 */
94 static void
95 sp_feComponentTransfer_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
96 {
97 if (((SPObjectClass *) feComponentTransfer_parent_class)->build) {
98 ((SPObjectClass *) feComponentTransfer_parent_class)->build(object, document, repr);
99 }
101 /*LOAD ATTRIBUTES FROM REPR HERE*/
102 sp_object_read_attr(object, "type");
103 sp_object_read_attr(object, "tableValues");
104 sp_object_read_attr(object, "slope");
105 sp_object_read_attr(object, "intercept");
106 sp_object_read_attr(object, "amplitude");
107 sp_object_read_attr(object, "exponent");
108 sp_object_read_attr(object, "offset");
109 }
111 /**
112 * Drops any allocated memory.
113 */
114 static void
115 sp_feComponentTransfer_release(SPObject *object)
116 {
117 if (((SPObjectClass *) feComponentTransfer_parent_class)->release)
118 ((SPObjectClass *) feComponentTransfer_parent_class)->release(object);
119 }
121 static NR::FilterComponentTransferType sp_feComponenttransfer_read_type(gchar const *value){
122 if (!value) return NR::COMPONENTTRANSFER_TYPE_ERROR; //type attribute is REQUIRED.
123 switch(value[0]){
124 case 'i':
125 if (strncmp(value, "identity", 8) == 0) return NR::COMPONENTTRANSFER_TYPE_IDENTITY;
126 break;
127 case 't':
128 if (strncmp(value, "table", 5) == 0) return NR::COMPONENTTRANSFER_TYPE_TABLE;
129 break;
130 case 'd':
131 if (strncmp(value, "discrete", 8) == 0) return NR::COMPONENTTRANSFER_TYPE_DISCRETE;
132 break;
133 case 'l':
134 if (strncmp(value, "linear", 6) == 0) return NR::COMPONENTTRANSFER_TYPE_LINEAR;
135 break;
136 case 'g':
137 if (strncmp(value, "gamma", 5) == 0) return NR::COMPONENTTRANSFER_TYPE_GAMMA;
138 break;
139 }
140 return NR::COMPONENTTRANSFER_TYPE_ERROR; //type attribute is REQUIRED.
141 }
143 /**
144 * Sets a specific value in the SPFeComponentTransfer.
145 */
146 static void
147 sp_feComponentTransfer_set(SPObject *object, unsigned int key, gchar const *value)
148 {
149 SPFeComponentTransfer *feComponentTransfer = SP_FECOMPONENTTRANSFER(object);
150 (void)feComponentTransfer;
152 NR::FilterComponentTransferType type;
153 switch(key) {
154 case SP_ATTR_TYPE:
155 type = sp_feComponenttransfer_read_type(value);
156 if(type != feComponentTransfer->type) {
157 feComponentTransfer->type = type;
158 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
159 }
160 break;
161 /*DEAL WITH SETTING ATTRIBUTES HERE*/
162 default:
163 if (((SPObjectClass *) feComponentTransfer_parent_class)->set)
164 ((SPObjectClass *) feComponentTransfer_parent_class)->set(object, key, value);
165 break;
166 }
168 }
170 /**
171 * Receives update notifications.
172 */
173 static void
174 sp_feComponentTransfer_update(SPObject *object, SPCtx *ctx, guint flags)
175 {
176 if (flags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG |
177 SP_OBJECT_VIEWPORT_MODIFIED_FLAG)) {
179 /* do something to trigger redisplay, updates? */
181 }
183 if (((SPObjectClass *) feComponentTransfer_parent_class)->update) {
184 ((SPObjectClass *) feComponentTransfer_parent_class)->update(object, ctx, flags);
185 }
186 }
188 /**
189 * Writes its settings to an incoming repr object, if any.
190 */
191 static Inkscape::XML::Node *
192 sp_feComponentTransfer_write(SPObject *object, Inkscape::XML::Node *repr, guint flags)
193 {
194 // Inkscape-only object, not copied during an "plain SVG" dump:
195 if (flags & SP_OBJECT_WRITE_EXT) {
196 if (repr) {
197 // is this sane?
198 //repr->mergeFrom(SP_OBJECT_REPR(object), "id");
199 } else {
200 repr = SP_OBJECT_REPR(object)->duplicate(NULL); // FIXME
201 }
202 }
204 if (((SPObjectClass *) feComponentTransfer_parent_class)->write) {
205 ((SPObjectClass *) feComponentTransfer_parent_class)->write(object, repr, flags);
206 }
208 return repr;
209 }
212 /*
213 Local Variables:
214 mode:c++
215 c-file-style:"stroustrup"
216 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
217 indent-tabs-mode:nil
218 fill-column:99
219 End:
220 */
221 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :