src/filters/pointlight.cpp

   1 #define __SP_FEPOINTLIGHT_CPP__
   2
   3 /** \file
   4  * SVG <fepointlight> implementation.
   5  */
   6 /*
   7  * Authors:
   8  *   Hugo Rodrigues <haa.rodrigues@gmail.com>
   9  *   Niko Kiirala <niko@kiirala.com>
  10  *   Jean-Rene Reinhard <jr@komite.net>
  11  *
  12  * Copyright (C) 2006,2007 Authors
  13  *
  14  * Released under GNU GPL, read the file 'COPYING' for more information
  15  */
  16
  17 #ifdef HAVE_CONFIG_H
  18 # include "config.h"
  19 #endif
  20
  21 #include <glib.h>
  22
  23 #include "attributes.h"
  24 #include "document.h"
  25 #include "pointlight.h"
  26 #include "diffuselighting-fns.h"
  27 #include "specularlighting-fns.h"
  28 #include "xml/repr.h"
  29
  30 #define SP_MACROS_SILENT
  31 #include "macros.h"
  32
  33 /* FePointLight class */
  34
  35 static void sp_fepointlight_class_init(SPFePointLightClass *klass);
  36 static void sp_fepointlight_init(SPFePointLight *fepointlight);
  37
  38 static void sp_fepointlight_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);
  39 static void sp_fepointlight_release(SPObject *object);
  40 static void sp_fepointlight_set(SPObject *object, unsigned int key, gchar const *value);
  41 static void sp_fepointlight_update(SPObject *object, SPCtx *ctx, guint flags);
  42 static Inkscape::XML::Node *sp_fepointlight_write(SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags);
  43
  44 static SPObjectClass *fePointLight_parent_class;
  45
  46 GType
  47 sp_fepointlight_get_type()
  48 {
  49     static GType fepointlight_type = 0;
  50
  51     if (!fepointlight_type) {
  52         GTypeInfo fepointlight_info = {
  53             sizeof(SPFePointLightClass),
  54             NULL, NULL,
  55             (GClassInitFunc) sp_fepointlight_class_init,
  56             NULL, NULL,
  57             sizeof(SPFePointLight),
  58             16,
  59             (GInstanceInitFunc) sp_fepointlight_init,
  60             NULL,    /* value_table */
  61         };
  62         fepointlight_type = g_type_register_static(SP_TYPE_OBJECT, "SPFePointLight", &fepointlight_info, (GTypeFlags)0);
  63     }
  64     return fepointlight_type;
  65 }
  66
  67 static void
  68 sp_fepointlight_class_init(SPFePointLightClass *klass)
  69 {
  70
  71     SPObjectClass *sp_object_class = (SPObjectClass *)klass;
  72
  73     fePointLight_parent_class = (SPObjectClass*)g_type_class_peek_parent(klass);
  74
  75     sp_object_class->build = sp_fepointlight_build;
  76     sp_object_class->release = sp_fepointlight_release;
  77     sp_object_class->write = sp_fepointlight_write;
  78     sp_object_class->set = sp_fepointlight_set;
  79     sp_object_class->update = sp_fepointlight_update;
  80 }
  81
  82 static void
  83 sp_fepointlight_init(SPFePointLight *fepointlight)
  84 {
  85     fepointlight->x = 0;
  86     fepointlight->y = 0;
  87     fepointlight->z = 0;
  88
  89     fepointlight->x_set = FALSE;
  90     fepointlight->y_set = FALSE;
  91     fepointlight->z_set = FALSE;
  92 }
  93
  94 /**
  95  * Reads the Inkscape::XML::Node, and initializes SPPointLight variables.  For this to get called,
  96  * our name must be associated with a repr via "sp_object_type_register".  Best done through
  97  * sp-object-repr.cpp's repr_name_entries array.
  98  */
  99 static void
 100 sp_fepointlight_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
 101 {
 102     if (((SPObjectClass *) fePointLight_parent_class)->build) {
 103         ((SPObjectClass *) fePointLight_parent_class)->build(object, document, repr);
 104     }
 105
 106     //Read values of key attributes from XML nodes into object.
 107     sp_object_read_attr(object, "x");
 108     sp_object_read_attr(object, "y");
 109     sp_object_read_attr(object, "z");
 110
 111 //is this necessary?
 112     sp_document_add_resource(document, "fepointlight", object);
 113 }
 114
 115 /**
 116  * Drops any allocated memory.
 117  */
 118 static void
 119 sp_fepointlight_release(SPObject *object)
 120 {
 121     //SPFePointLight *fepointlight = SP_FEPOINTLIGHT(object);
 122
 123     if (SP_OBJECT_DOCUMENT(object)) {
 124         /* Unregister ourselves */
 125         sp_document_remove_resource(SP_OBJECT_DOCUMENT(object), "fepointlight", SP_OBJECT(object));
 126     }
 127
 128 //TODO: release resources here
 129 }
 130
 131 /**
 132  * Sets a specific value in the SPFePointLight.
 133  */
 134 static void
 135 sp_fepointlight_set(SPObject *object, unsigned int key, gchar const *value)
 136 {
 137     SPFePointLight *fepointlight = SP_FEPOINTLIGHT(object);
 138     gchar *end_ptr;
 139     switch (key) {
 140     case SP_ATTR_X:
 141         end_ptr = NULL;
 142         if (value) {
 143             fepointlight->x = g_ascii_strtod(value, &end_ptr);
 144             if (end_ptr) {
 145                 fepointlight->x_set = TRUE;
 146             }
 147         }
 148         if (!value || !end_ptr) {
 149             fepointlight->x = 0;
 150             fepointlight->x_set = FALSE;
 151         }
 152         if (object->parent &&
 153                 (SP_IS_FEDIFFUSELIGHTING(object->parent) ||
 154                  SP_IS_FESPECULARLIGHTING(object->parent))) {
 155             object->parent->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
 156         }
 157         break;
 158     case SP_ATTR_Y:
 159         end_ptr = NULL;
 160         if (value) {
 161             fepointlight->y = g_ascii_strtod(value, &end_ptr);
 162             if (end_ptr) {
 163                 fepointlight->y_set = TRUE;
 164             }
 165         }
 166         if (!value || !end_ptr) {
 167             fepointlight->y = 0;
 168             fepointlight->y_set = FALSE;
 169         }
 170         if (object->parent &&
 171                 (SP_IS_FEDIFFUSELIGHTING(object->parent) ||
 172                  SP_IS_FESPECULARLIGHTING(object->parent))) {
 173             object->parent->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
 174         }
 175         break;
 176     case SP_ATTR_Z:
 177         end_ptr = NULL;
 178         if (value) {
 179             fepointlight->z = g_ascii_strtod(value, &end_ptr);
 180             if (end_ptr) {
 181                 fepointlight->z_set = TRUE;
 182             }
 183         }
 184         if (!value || !end_ptr) {
 185             fepointlight->z = 0;
 186             fepointlight->z_set = FALSE;
 187         }
 188         if (object->parent &&
 189                 (SP_IS_FEDIFFUSELIGHTING(object->parent) ||
 190                  SP_IS_FESPECULARLIGHTING(object->parent))) {
 191             object->parent->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
 192         }
 193         break;
 194     default:
 195         // See if any parents need this value.
 196         if (((SPObjectClass *) fePointLight_parent_class)->set) {
 197             ((SPObjectClass *) fePointLight_parent_class)->set(object, key, value);
 198         }
 199         break;
 200     }
 201 }
 202
 203 /**
 204  *  * Receives update notifications.
 205  *   */
 206 static void
 207 sp_fepointlight_update(SPObject *object, SPCtx *ctx, guint flags)
 208 {
 209     SPFePointLight *fePointLight = SP_FEPOINTLIGHT(object);
 210     (void)fePointLight;
 211
 212     if (flags & SP_OBJECT_MODIFIED_FLAG) {
 213         /* do something to trigger redisplay, updates? */
 214         sp_object_read_attr(object, "x");
 215         sp_object_read_attr(object, "y");
 216         sp_object_read_attr(object, "z");
 217     }
 218
 219     if (((SPObjectClass *) fePointLight_parent_class)->update) {
 220         ((SPObjectClass *) fePointLight_parent_class)->update(object, ctx, flags);
 221     }
 222 }
 223
 224 /**
 225  * Writes its settings to an incoming repr object, if any.
 226  */
 227 static Inkscape::XML::Node *
 228 sp_fepointlight_write(SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags)
 229 {
 230     SPFePointLight *fepointlight = SP_FEPOINTLIGHT(object);
 231
 232     if (!repr) {
 233         repr = SP_OBJECT_REPR(object)->duplicate(doc);
 234     }
 235
 236     if (fepointlight->x_set)
 237         sp_repr_set_css_double(repr, "x", fepointlight->x);
 238     if (fepointlight->y_set)
 239         sp_repr_set_css_double(repr, "y", fepointlight->y);
 240     if (fepointlight->z_set)
 241         sp_repr_set_css_double(repr, "z", fepointlight->z);
 242
 243     if (((SPObjectClass *) fePointLight_parent_class)->write) {
 244         ((SPObjectClass *) fePointLight_parent_class)->write(object, doc, repr, flags);
 245     }
 246
 247     return repr;
 248 }
 249
 250 /*
 251   Local Variables:
 252   mode:c++
 253   c-file-style:"stroustrup"
 254   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 255   indent-tabs-mode:nil
 256   fill-column:99
 257   End:
 258 */
 259 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :