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 <string.h>
  21
  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"
  27
  28 /* FeComponentTransfer base class */
  29
  30 static void sp_feComponentTransfer_class_init(SPFeComponentTransferClass *klass);
  31 static void sp_feComponentTransfer_init(SPFeComponentTransfer *feComponentTransfer);
  32
  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);
  38
  39 static SPFilterPrimitiveClass *feComponentTransfer_parent_class;
  40
  41 GType
  42 sp_feComponentTransfer_get_type()
  43 {
  44     static GType feComponentTransfer_type = 0;
  45
  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 }
  61
  62 static void
  63 sp_feComponentTransfer_class_init(SPFeComponentTransferClass *klass)
  64 {
  65     SPObjectClass *sp_object_class = (SPObjectClass *)klass;
  66
  67     feComponentTransfer_parent_class = (SPFilterPrimitiveClass*)g_type_class_peek_parent(klass);
  68
  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 }
  75
  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 }
  88
  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     }
 100
 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 }
 110
 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 }
 120
 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 }
 142
 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;
 151
 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     }
 167
 168 }
 169
 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)) {
 178
 179         /* do something to trigger redisplay, updates? */
 180
 181     }
 182
 183     if (((SPObjectClass *) feComponentTransfer_parent_class)->update) {
 184         ((SPObjectClass *) feComponentTransfer_parent_class)->update(object, ctx, flags);
 185     }
 186 }
 187
 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     }
 203
 204     if (((SPObjectClass *) feComponentTransfer_parent_class)->write) {
 205         ((SPObjectClass *) feComponentTransfer_parent_class)->write(object, repr, flags);
 206     }
 207
 208     return repr;
 209 }
 210
 211
 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 :