src/sp-fecomponenttransfer.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 "attributes.h"
  21 #include "svg/svg.h"
  22 #include "sp-fecomponenttransfer.h"
  23 #include "xml/repr.h"
  24 #include "display/nr-filter-component-transfer.h"
  25
  26 /* FeComponentTransfer base class */
  27
  28 static void sp_feComponentTransfer_class_init(SPFeComponentTransferClass *klass);
  29 static void sp_feComponentTransfer_init(SPFeComponentTransfer *feComponentTransfer);
  30
  31 static void sp_feComponentTransfer_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);
  32 static void sp_feComponentTransfer_release(SPObject *object);
  33 static void sp_feComponentTransfer_set(SPObject *object, unsigned int key, gchar const *value);
  34 static void sp_feComponentTransfer_update(SPObject *object, SPCtx *ctx, guint flags);
  35 static Inkscape::XML::Node *sp_feComponentTransfer_write(SPObject *object, Inkscape::XML::Node *repr, guint flags);
  36
  37 static SPFilterPrimitiveClass *feComponentTransfer_parent_class;
  38
  39 GType
  40 sp_feComponentTransfer_get_type()
  41 {
  42     static GType feComponentTransfer_type = 0;
  43
  44     if (!feComponentTransfer_type) {
  45         GTypeInfo feComponentTransfer_info = {
  46             sizeof(SPFeComponentTransferClass),
  47             NULL, NULL,
  48             (GClassInitFunc) sp_feComponentTransfer_class_init,
  49             NULL, NULL,
  50             sizeof(SPFeComponentTransfer),
  51             16,
  52             (GInstanceInitFunc) sp_feComponentTransfer_init,
  53             NULL,    /* value_table */
  54         };
  55         feComponentTransfer_type = g_type_register_static(SP_TYPE_FILTER_PRIMITIVE, "SPFeComponentTransfer", &feComponentTransfer_info, (GTypeFlags)0);
  56     }
  57     return feComponentTransfer_type;
  58 }
  59
  60 static void
  61 sp_feComponentTransfer_class_init(SPFeComponentTransferClass *klass)
  62 {
  63     SPObjectClass *sp_object_class = (SPObjectClass *)klass;
  64
  65     feComponentTransfer_parent_class = (SPFilterPrimitiveClass*)g_type_class_peek_parent(klass);
  66
  67     sp_object_class->build = sp_feComponentTransfer_build;
  68     sp_object_class->release = sp_feComponentTransfer_release;
  69     sp_object_class->write = sp_feComponentTransfer_write;
  70     sp_object_class->set = sp_feComponentTransfer_set;
  71     sp_object_class->update = sp_feComponentTransfer_update;
  72 }
  73
  74 static void
  75 sp_feComponentTransfer_init(SPFeComponentTransfer *feComponentTransfer)
  76 {
  77     //Setting default values:
  78 //TODO: tableValues = "" (empty list);
  79     feComponentTransfer->slope = 1;
  80     feComponentTransfer->intercept = 0;
  81     feComponentTransfer->amplitude = 1;
  82     feComponentTransfer->exponent = 1;
  83     feComponentTransfer->offset = 0;
  84 //    feComponentTransfer->type = NR::COMPONENTTRANSFER_TYPE_ERROR;
  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     sp_object_read_attr(object, "type");
 101     sp_object_read_attr(object, "tableValues");
 102     sp_object_read_attr(object, "slope");
 103     sp_object_read_attr(object, "intercept");
 104     sp_object_read_attr(object, "amplitude");
 105     sp_object_read_attr(object, "exponent");
 106     sp_object_read_attr(object, "offset");
 107 }
 108
 109 /**
 110  * Drops any allocated memory.
 111  */
 112 static void
 113 sp_feComponentTransfer_release(SPObject *object)
 114 {
 115     if (((SPObjectClass *) feComponentTransfer_parent_class)->release)
 116         ((SPObjectClass *) feComponentTransfer_parent_class)->release(object);
 117 }
 118
 119 static NR::FilterComponentTransferType sp_feComponenttransfer_read_type(gchar const *value){
 120     if (!value) return NR::COMPONENTTRANSFER_TYPE_ERROR; //type attribute is REQUIRED.
 121     switch(value[0]){
 122         case 'i':
 123             if (strncmp(value, "identity", 8) == 0) return NR::COMPONENTTRANSFER_TYPE_IDENTITY;
 124             break;
 125         case 't':
 126             if (strncmp(value, "table", 5) == 0) return NR::COMPONENTTRANSFER_TYPE_TABLE;
 127             break;
 128         case 'd':
 129             if (strncmp(value, "discrete", 8) == 0) return NR::COMPONENTTRANSFER_TYPE_DISCRETE;
 130             break;
 131         case 'l':
 132             if (strncmp(value, "linear", 6) == 0) return NR::COMPONENTTRANSFER_TYPE_LINEAR;
 133             break;
 134         case 'g':
 135             if (strncmp(value, "gamma", 5) == 0) return NR::COMPONENTTRANSFER_TYPE_GAMMA;
 136             break;
 137     }
 138     return NR::COMPONENTTRANSFER_TYPE_ERROR; //type attribute is REQUIRED.
 139 }
 140
 141 /**
 142  * Sets a specific value in the SPFeComponentTransfer.
 143  */
 144 static void
 145 sp_feComponentTransfer_set(SPObject *object, unsigned int key, gchar const *value)
 146 {
 147     SPFeComponentTransfer *feComponentTransfer = SP_FECOMPONENTTRANSFER(object);
 148     (void)feComponentTransfer;
 149
 150     NR::FilterComponentTransferType type;
 151     switch(key) {
 152         case SP_ATTR_TYPE:
 153             type = sp_feComponenttransfer_read_type(value);
 154             if(type != feComponentTransfer->type) {
 155                 feComponentTransfer->type = type;
 156                 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
 157             }
 158             break;
 159         /*DEAL WITH SETTING ATTRIBUTES HERE*/
 160         default:
 161             if (((SPObjectClass *) feComponentTransfer_parent_class)->set)
 162                 ((SPObjectClass *) feComponentTransfer_parent_class)->set(object, key, value);
 163             break;
 164     }
 165
 166 }
 167
 168 /**
 169  * Receives update notifications.
 170  */
 171 static void
 172 sp_feComponentTransfer_update(SPObject *object, SPCtx *ctx, guint flags)
 173 {
 174     if (flags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG |
 175                  SP_OBJECT_VIEWPORT_MODIFIED_FLAG)) {
 176
 177         /* do something to trigger redisplay, updates? */
 178
 179     }
 180
 181     if (((SPObjectClass *) feComponentTransfer_parent_class)->update) {
 182         ((SPObjectClass *) feComponentTransfer_parent_class)->update(object, ctx, flags);
 183     }
 184 }
 185
 186 /**
 187  * Writes its settings to an incoming repr object, if any.
 188  */
 189 static Inkscape::XML::Node *
 190 sp_feComponentTransfer_write(SPObject *object, Inkscape::XML::Node *repr, guint flags)
 191 {
 192     // Inkscape-only object, not copied during an "plain SVG" dump:
 193     if (flags & SP_OBJECT_WRITE_EXT) {
 194         if (repr) {
 195             // is this sane?
 196             repr->mergeFrom(SP_OBJECT_REPR(object), "id");
 197         } else {
 198             repr = SP_OBJECT_REPR(object)->duplicate(NULL); // FIXME
 199         }
 200     }
 201
 202     if (((SPObjectClass *) feComponentTransfer_parent_class)->write) {
 203         ((SPObjectClass *) feComponentTransfer_parent_class)->write(object, repr, flags);
 204     }
 205
 206     return repr;
 207 }
 208
 209
 210 /*
 211   Local Variables:
 212   mode:c++
 213   c-file-style:"stroustrup"
 214   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 215   indent-tabs-mode:nil
 216   fill-column:99
 217   End:
 218 */
 219 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :