src/filters/componenttransfer.cpp

   1 /** \file
   2  * SVG <feComponentTransfer> implementation.
   3  *
   4  */
   5 /*
   6  * Authors:
   7  *   hugo Rodrigues <haa.rodrigues@gmail.com>
   8  *   Abhishek Sharma
   9  *
  10  * Copyright (C) 2006 Hugo Rodrigues
  11  *
  12  * Released under GNU GPL, read the file 'COPYING' for more information
  13  */
  14
  15 #ifdef HAVE_CONFIG_H
  16 # include "config.h"
  17 #endif
  18
  19 #include <string.h>
  20
  21 #include "document.h"
  22 #include "attributes.h"
  23 #include "svg/svg.h"
  24 #include "componenttransfer.h"
  25 #include "componenttransfer-funcnode.h"
  26 #include "xml/repr.h"
  27 #include "display/nr-filter-component-transfer.h"
  28
  29 /* FeComponentTransfer base class */
  30
  31 static void sp_feComponentTransfer_class_init(SPFeComponentTransferClass *klass);
  32 static void sp_feComponentTransfer_init(SPFeComponentTransfer *feComponentTransfer);
  33
  34 static void sp_feComponentTransfer_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);
  35 static void sp_feComponentTransfer_release(SPObject *object);
  36 static void sp_feComponentTransfer_set(SPObject *object, unsigned int key, gchar const *value);
  37 static void sp_feComponentTransfer_update(SPObject *object, SPCtx *ctx, guint flags);
  38 static void sp_feComponentTransfer_build_renderer(SPFilterPrimitive *primitive, Inkscape::Filters::Filter *filter);
  39 static void sp_feComponentTransfer_remove_child(SPObject *object, Inkscape::XML::Node *child);
  40 static void sp_feComponentTransfer_child_added(SPObject *object, Inkscape::XML::Node *child, Inkscape::XML::Node *ref);
  41 static Inkscape::XML::Node *sp_feComponentTransfer_write(SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags);
  42 static SPFilterPrimitiveClass *feComponentTransfer_parent_class;
  43
  44 GType
  45 sp_feComponentTransfer_get_type()
  46 {
  47     static GType feComponentTransfer_type = 0;
  48
  49     if (!feComponentTransfer_type) {
  50         GTypeInfo feComponentTransfer_info = {
  51             sizeof(SPFeComponentTransferClass),
  52             NULL, NULL,
  53             (GClassInitFunc) sp_feComponentTransfer_class_init,
  54             NULL, NULL,
  55             sizeof(SPFeComponentTransfer),
  56             16,
  57             (GInstanceInitFunc) sp_feComponentTransfer_init,
  58             NULL,    /* value_table */
  59         };
  60         feComponentTransfer_type = g_type_register_static(SP_TYPE_FILTER_PRIMITIVE, "SPFeComponentTransfer", &feComponentTransfer_info, (GTypeFlags)0);
  61     }
  62     return feComponentTransfer_type;
  63 }
  64
  65 static void
  66 sp_feComponentTransfer_class_init(SPFeComponentTransferClass *klass)
  67 {
  68     SPObjectClass *sp_object_class = (SPObjectClass *)klass;
  69     SPFilterPrimitiveClass *sp_primitive_class = (SPFilterPrimitiveClass *)klass;
  70     feComponentTransfer_parent_class = (SPFilterPrimitiveClass*)g_type_class_peek_parent(klass);
  71
  72     sp_object_class->build = sp_feComponentTransfer_build;
  73     sp_object_class->release = sp_feComponentTransfer_release;
  74     sp_object_class->write = sp_feComponentTransfer_write;
  75     sp_object_class->set = sp_feComponentTransfer_set;
  76     sp_object_class->update = sp_feComponentTransfer_update;
  77     sp_object_class->child_added = sp_feComponentTransfer_child_added;
  78     sp_object_class->remove_child = sp_feComponentTransfer_remove_child;
  79
  80     sp_primitive_class->build_renderer = sp_feComponentTransfer_build_renderer;
  81 }
  82
  83 static void
  84 sp_feComponentTransfer_init(SPFeComponentTransfer */*feComponentTransfer*/)
  85 {}
  86
  87 /**
  88  * Reads the Inkscape::XML::Node, and initializes SPFeComponentTransfer variables.  For this to get called,
  89  * our name must be associated with a repr via "sp_object_type_register".  Best done through
  90  * sp-object-repr.cpp's repr_name_entries array.
  91  */
  92 static void
  93 sp_feComponentTransfer_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
  94 {
  95     if (((SPObjectClass *) feComponentTransfer_parent_class)->build) {
  96         ((SPObjectClass *) feComponentTransfer_parent_class)->build(object, document, repr);
  97     }
  98
  99     /*LOAD ATTRIBUTES FROM REPR HERE*/
 100
 101     //do we need this?
 102     document->addResource("feComponentTransfer", object);
 103 }
 104
 105 static void sp_feComponentTransfer_children_modified(SPFeComponentTransfer *sp_componenttransfer)
 106 {
 107     if (sp_componenttransfer->renderer) {
 108         bool set[4] = {false, false, false, false};
 109         SPObject* node = sp_componenttransfer->children;
 110         for(;node;node=node->next){
 111             int i=4;
 112             if (SP_IS_FEFUNCR(node)) i=0;
 113             if (SP_IS_FEFUNCG(node)) i=1;
 114             if (SP_IS_FEFUNCB(node)) i=2;
 115             if (SP_IS_FEFUNCA(node)) i=3;
 116             if (i==4) {
 117                 g_warning("Unrecognized channel for component transfer.");
 118                 break;
 119             }
 120             sp_componenttransfer->renderer->type[i] = ((SPFeFuncNode *) node)->type;
 121             sp_componenttransfer->renderer->tableValues[i] = ((SPFeFuncNode *) node)->tableValues;
 122             sp_componenttransfer->renderer->slope[i] = ((SPFeFuncNode *) node)->slope;
 123             sp_componenttransfer->renderer->intercept[i] = ((SPFeFuncNode *) node)->intercept;
 124             sp_componenttransfer->renderer->amplitude[i] = ((SPFeFuncNode *) node)->amplitude;
 125             sp_componenttransfer->renderer->exponent[i] = ((SPFeFuncNode *) node)->exponent;
 126             sp_componenttransfer->renderer->offset[i] = ((SPFeFuncNode *) node)->offset;
 127             set[i] = true;
 128         }
 129         // Set any types not explicitly set to the identity transform
 130         for(int i=0;i<4;i++) {
 131             if (!set[i]) {
 132                 sp_componenttransfer->renderer->type[i] = Inkscape::Filters::COMPONENTTRANSFER_TYPE_IDENTITY;
 133             }
 134         }
 135     }
 136 }
 137
 138 /**
 139  * Callback for child_added event.
 140  */
 141 static void
 142 sp_feComponentTransfer_child_added(SPObject *object, Inkscape::XML::Node *child, Inkscape::XML::Node *ref)
 143 {
 144     SPFeComponentTransfer *f = SP_FECOMPONENTTRANSFER(object);
 145
 146     if (((SPObjectClass *) feComponentTransfer_parent_class)->child_added)
 147         (* ((SPObjectClass *) feComponentTransfer_parent_class)->child_added)(object, child, ref);
 148
 149     sp_feComponentTransfer_children_modified(f);
 150     object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
 151 }
 152
 153
 154 /**
 155  * Callback for remove_child event.
 156  */
 157 static void
 158 sp_feComponentTransfer_remove_child(SPObject *object, Inkscape::XML::Node *child)
 159 {
 160     SPFeComponentTransfer *f = SP_FECOMPONENTTRANSFER(object);
 161
 162     if (((SPObjectClass *) feComponentTransfer_parent_class)->remove_child)
 163         (* ((SPObjectClass *) feComponentTransfer_parent_class)->remove_child)(object, child);
 164
 165     sp_feComponentTransfer_children_modified(f);
 166     object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
 167 }
 168
 169 /**
 170  * Drops any allocated memory.
 171  */
 172 static void
 173 sp_feComponentTransfer_release(SPObject *object)
 174 {
 175     if (((SPObjectClass *) feComponentTransfer_parent_class)->release)
 176         ((SPObjectClass *) feComponentTransfer_parent_class)->release(object);
 177 }
 178
 179 /**
 180  * Sets a specific value in the SPFeComponentTransfer.
 181  */
 182 static void
 183 sp_feComponentTransfer_set(SPObject *object, unsigned int key, gchar const *value)
 184 {
 185     SPFeComponentTransfer *feComponentTransfer = SP_FECOMPONENTTRANSFER(object);
 186     (void)feComponentTransfer;
 187
 188     switch(key) {
 189         /*DEAL WITH SETTING ATTRIBUTES HERE*/
 190         default:
 191             if (((SPObjectClass *) feComponentTransfer_parent_class)->set)
 192                 ((SPObjectClass *) feComponentTransfer_parent_class)->set(object, key, value);
 193             break;
 194     }
 195 }
 196
 197 /**
 198  * Receives update notifications.
 199  */
 200 static void
 201 sp_feComponentTransfer_update(SPObject *object, SPCtx *ctx, guint flags)
 202 {
 203     if (flags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG |
 204                  SP_OBJECT_VIEWPORT_MODIFIED_FLAG)) {
 205
 206         /* do something to trigger redisplay, updates? */
 207
 208     }
 209
 210     if (((SPObjectClass *) feComponentTransfer_parent_class)->update) {
 211         ((SPObjectClass *) feComponentTransfer_parent_class)->update(object, ctx, flags);
 212     }
 213 }
 214
 215 /**
 216  * Writes its settings to an incoming repr object, if any.
 217  */
 218 static Inkscape::XML::Node *
 219 sp_feComponentTransfer_write(SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags)
 220 {
 221     /* TODO: Don't just clone, but create a new repr node and write all
 222      * relevant values into it */
 223     if (!repr) {
 224         repr = SP_OBJECT_REPR(object)->duplicate(doc);
 225     }
 226
 227     if (((SPObjectClass *) feComponentTransfer_parent_class)->write) {
 228         ((SPObjectClass *) feComponentTransfer_parent_class)->write(object, doc, repr, flags);
 229     }
 230
 231     return repr;
 232 }
 233
 234 static void sp_feComponentTransfer_build_renderer(SPFilterPrimitive *primitive, Inkscape::Filters::Filter *filter) {
 235     g_assert(primitive != NULL);
 236     g_assert(filter != NULL);
 237
 238     SPFeComponentTransfer *sp_componenttransfer = SP_FECOMPONENTTRANSFER(primitive);
 239
 240     int primitive_n = filter->add_primitive(Inkscape::Filters::NR_FILTER_COMPONENTTRANSFER);
 241     Inkscape::Filters::FilterPrimitive *nr_primitive = filter->get_primitive(primitive_n);
 242     Inkscape::Filters::FilterComponentTransfer *nr_componenttransfer = dynamic_cast<Inkscape::Filters::FilterComponentTransfer*>(nr_primitive);
 243     g_assert(nr_componenttransfer != NULL);
 244
 245     sp_componenttransfer->renderer = nr_componenttransfer;
 246     sp_filter_primitive_renderer_common(primitive, nr_primitive);
 247
 248
 249     sp_feComponentTransfer_children_modified(sp_componenttransfer);    //do we need it?!
 250 }
 251
 252 /*
 253   Local Variables:
 254   mode:c++
 255   c-file-style:"stroustrup"
 256   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 257   indent-tabs-mode:nil
 258   fill-column:99
 259   End:
 260 */
 261 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :