src/sp-feimage.cpp

   1 #define __SP_FEIMAGE_CPP__
   2
   3 /** \file
   4  * SVG <feImage> implementation.
   5  *
   6  */
   7 /*
   8  * Authors:
   9  *   Felipe Corrêa da Silva Sanches <felipe.sanches@gmail.com>
  10  *   hugo Rodrigues <haa.rodrigues@gmail.com>
  11  *
  12  * Copyright (C) 2007 Felipe Sanches
  13  * Copyright (C) 2006 Hugo Rodrigues
  14  *
  15  * Released under GNU GPL, read the file 'COPYING' for more information
  16  */
  17
  18 #ifdef HAVE_CONFIG_H
  19 # include "config.h"
  20 #endif
  21
  22 #include "attributes.h"
  23 #include "svg/svg.h"
  24 #include "sp-feimage.h"
  25 #include "xml/repr.h"
  26 #include <string.h>
  27
  28 #include "display/nr-filter.h"
  29 #include "display/nr-filter-image.h"
  30
  31 /* FeImage base class */
  32
  33 static void sp_feImage_class_init(SPFeImageClass *klass);
  34 static void sp_feImage_init(SPFeImage *feImage);
  35
  36 static void sp_feImage_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);
  37 static void sp_feImage_release(SPObject *object);
  38 static void sp_feImage_set(SPObject *object, unsigned int key, gchar const *value);
  39 static void sp_feImage_update(SPObject *object, SPCtx *ctx, guint flags);
  40 static Inkscape::XML::Node *sp_feImage_write(SPObject *object, Inkscape::XML::Node *repr, guint flags);
  41 static void sp_feImage_build_renderer(SPFilterPrimitive *primitive, NR::Filter *filter);
  42
  43 static SPFilterPrimitiveClass *feImage_parent_class;
  44
  45 GType
  46 sp_feImage_get_type()
  47 {
  48     static GType feImage_type = 0;
  49
  50     if (!feImage_type) {
  51         GTypeInfo feImage_info = {
  52             sizeof(SPFeImageClass),
  53             NULL, NULL,
  54             (GClassInitFunc) sp_feImage_class_init,
  55             NULL, NULL,
  56             sizeof(SPFeImage),
  57             16,
  58             (GInstanceInitFunc) sp_feImage_init,
  59             NULL,    /* value_table */
  60         };
  61         feImage_type = g_type_register_static(SP_TYPE_FILTER_PRIMITIVE, "SPFeImage", &feImage_info, (GTypeFlags)0);
  62     }
  63     return feImage_type;
  64 }
  65
  66 static void
  67 sp_feImage_class_init(SPFeImageClass *klass)
  68 {
  69     SPObjectClass *sp_object_class = (SPObjectClass *)klass;
  70     SPFilterPrimitiveClass * sp_primitive_class = (SPFilterPrimitiveClass *)klass;
  71
  72     feImage_parent_class = (SPFilterPrimitiveClass*)g_type_class_peek_parent(klass);
  73
  74     sp_object_class->build = sp_feImage_build;
  75     sp_object_class->release = sp_feImage_release;
  76     sp_object_class->write = sp_feImage_write;
  77     sp_object_class->set = sp_feImage_set;
  78     sp_object_class->update = sp_feImage_update;
  79
  80     sp_primitive_class->build_renderer = sp_feImage_build_renderer;
  81 }
  82
  83 static void
  84 sp_feImage_init(SPFeImage */*feImage*/)
  85 {
  86 }
  87
  88 /**
  89  * Reads the Inkscape::XML::Node, and initializes SPFeImage 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_feImage_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
  95 {
  96     // Save document reference so we can load images with relative paths.
  97     SPFeImage *feImage = SP_FEIMAGE(object);
  98     feImage->document = document;
  99
 100     if (((SPObjectClass *) feImage_parent_class)->build) {
 101         ((SPObjectClass *) feImage_parent_class)->build(object, document, repr);
 102     }
 103
 104     /*LOAD ATTRIBUTES FROM REPR HERE*/
 105
 106     sp_object_read_attr(object, "x");
 107     sp_object_read_attr(object, "y");
 108     sp_object_read_attr(object, "width");
 109     sp_object_read_attr(object, "height");
 110     sp_object_read_attr(object, "xlink:href");
 111
 112 }
 113
 114 /**
 115  * Drops any allocated memory.
 116  */
 117 static void
 118 sp_feImage_release(SPObject *object)
 119 {
 120
 121     if (((SPObjectClass *) feImage_parent_class)->release)
 122         ((SPObjectClass *) feImage_parent_class)->release(object);
 123 }
 124
 125 /**
 126  * Sets a specific value in the SPFeImage.
 127  */
 128 static void
 129 sp_feImage_set(SPObject *object, unsigned int key, gchar const *value)
 130 {
 131     SPFeImage *feImage = SP_FEIMAGE(object);
 132     (void)feImage;
 133
 134     switch(key) {
 135         /*DEAL WITH SETTING ATTRIBUTES HERE*/
 136         case SP_ATTR_XLINK_HREF:
 137             if (feImage->href) g_free(feImage->href);
 138             feImage->href = (value) ? g_strdup (value) : NULL;
 139             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 140             break;
 141         case SP_ATTR_X:
 142             feImage->x.readOrUnset(value);
 143             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 144             break;
 145         case SP_ATTR_Y:
 146             feImage->y.readOrUnset(value);
 147             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 148             break;
 149         case SP_ATTR_WIDTH:
 150             feImage->width.readOrUnset(value);
 151             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 152             break;
 153         case SP_ATTR_HEIGHT:
 154             feImage->height.readOrUnset(value);
 155             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 156             break;
 157         default:
 158             if (((SPObjectClass *) feImage_parent_class)->set)
 159                 ((SPObjectClass *) feImage_parent_class)->set(object, key, value);
 160             break;
 161     }
 162
 163 }
 164
 165 /**
 166  * Receives update notifications.
 167  */
 168 static void
 169 sp_feImage_update(SPObject *object, SPCtx *ctx, guint flags)
 170 {
 171
 172     if (flags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG |
 173                  SP_OBJECT_VIEWPORT_MODIFIED_FLAG)) {
 174
 175         /* do something to trigger redisplay, updates? */
 176     }
 177
 178     if (((SPObjectClass *) feImage_parent_class)->update) {
 179         ((SPObjectClass *) feImage_parent_class)->update(object, ctx, flags);
 180     }
 181 }
 182
 183 /**
 184  * Writes its settings to an incoming repr object, if any.
 185  */
 186 static Inkscape::XML::Node *
 187 sp_feImage_write(SPObject *object, Inkscape::XML::Node *repr, guint flags)
 188 {
 189     // Inkscape-only object, not copied during an "plain SVG" dump:
 190     if (flags & SP_OBJECT_WRITE_EXT) {
 191         if (repr) {
 192             // is this sane?
 193             //repr->mergeFrom(SP_OBJECT_REPR(object), "id");
 194         } else {
 195             repr = SP_OBJECT_REPR(object)->duplicate(NULL); // FIXME
 196         }
 197     }
 198
 199     if (((SPObjectClass *) feImage_parent_class)->write) {
 200         ((SPObjectClass *) feImage_parent_class)->write(object, repr, flags);
 201     }
 202
 203     return repr;
 204 }
 205
 206 static void sp_feImage_build_renderer(SPFilterPrimitive *primitive, NR::Filter *filter) {
 207     g_assert(primitive != NULL);
 208     g_assert(filter != NULL);
 209
 210     SPFeImage *sp_image = SP_FEIMAGE(primitive);
 211
 212     int primitive_n = filter->add_primitive(NR::NR_FILTER_IMAGE);
 213     NR::FilterPrimitive *nr_primitive = filter->get_primitive(primitive_n);
 214     NR::FilterImage *nr_image = dynamic_cast<NR::FilterImage*>(nr_primitive);
 215     g_assert(nr_image != NULL);
 216
 217     sp_filter_primitive_renderer_common(primitive, nr_primitive);
 218     nr_image->set_region(sp_image->x, sp_image->y, sp_image->width, sp_image->height);
 219     nr_image->set_href(sp_image->href);
 220     nr_image->set_document(sp_image->document);
 221 }
 222
 223 /*
 224   Local Variables:
 225   mode:c++
 226   c-file-style:"stroustrup"
 227   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 228   indent-tabs-mode:nil
 229   fill-column:99
 230   End:
 231 */
 232 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :