src/filters/componenttransfer.cpp

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