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     if (((SPObjectClass *) feImage_parent_class)->build) {
  97         ((SPObjectClass *) feImage_parent_class)->build(object, document, repr);
  98     }
  99
 100     /*LOAD ATTRIBUTES FROM REPR HERE*/
 101
 102     sp_object_read_attr(object, "x");
 103     sp_object_read_attr(object, "y");
 104     sp_object_read_attr(object, "width");
 105     sp_object_read_attr(object, "height");
 106     sp_object_read_attr(object, "xlink:href");
 107
 108 }
 109
 110 /**
 111  * Drops any allocated memory.
 112  */
 113 static void
 114 sp_feImage_release(SPObject *object)
 115 {
 116
 117     if (((SPObjectClass *) feImage_parent_class)->release)
 118         ((SPObjectClass *) feImage_parent_class)->release(object);
 119 }
 120
 121 /**
 122  * Sets a specific value in the SPFeImage.
 123  */
 124 static void
 125 sp_feImage_set(SPObject *object, unsigned int key, gchar const *value)
 126 {
 127     SPFeImage *feImage = SP_FEIMAGE(object);
 128     (void)feImage;
 129
 130     switch(key) {
 131         /*DEAL WITH SETTING ATTRIBUTES HERE*/
 132         case SP_ATTR_XLINK_HREF:
 133             if (feImage->href) g_free(feImage->href);
 134             feImage->href = (value) ? g_strdup (value) : NULL;
 135             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 136             break;
 137         case SP_ATTR_X:
 138             feImage->x.readOrUnset(value);
 139             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 140             break;
 141         case SP_ATTR_Y:
 142             feImage->y.readOrUnset(value);
 143             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 144             break;
 145         case SP_ATTR_WIDTH:
 146             feImage->width.readOrUnset(value);
 147             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 148             break;
 149         case SP_ATTR_HEIGHT:
 150             feImage->height.readOrUnset(value);
 151             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 152             break;
 153         default:
 154             if (((SPObjectClass *) feImage_parent_class)->set)
 155                 ((SPObjectClass *) feImage_parent_class)->set(object, key, value);
 156             break;
 157     }
 158
 159 }
 160
 161 /**
 162  * Receives update notifications.
 163  */
 164 static void
 165 sp_feImage_update(SPObject *object, SPCtx *ctx, guint flags)
 166 {
 167
 168     if (flags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG |
 169                  SP_OBJECT_VIEWPORT_MODIFIED_FLAG)) {
 170
 171         /* do something to trigger redisplay, updates? */
 172     }
 173
 174     if (((SPObjectClass *) feImage_parent_class)->update) {
 175         ((SPObjectClass *) feImage_parent_class)->update(object, ctx, flags);
 176     }
 177 }
 178
 179 /**
 180  * Writes its settings to an incoming repr object, if any.
 181  */
 182 static Inkscape::XML::Node *
 183 sp_feImage_write(SPObject *object, Inkscape::XML::Node *repr, guint flags)
 184 {
 185     // Inkscape-only object, not copied during an "plain SVG" dump:
 186     if (flags & SP_OBJECT_WRITE_EXT) {
 187         if (repr) {
 188             // is this sane?
 189             repr->mergeFrom(SP_OBJECT_REPR(object), "id");
 190         } else {
 191             repr = SP_OBJECT_REPR(object)->duplicate(NULL); // FIXME
 192         }
 193     }
 194
 195     if (((SPObjectClass *) feImage_parent_class)->write) {
 196         ((SPObjectClass *) feImage_parent_class)->write(object, repr, flags);
 197     }
 198
 199     return repr;
 200 }
 201
 202 static void sp_feImage_build_renderer(SPFilterPrimitive *primitive, NR::Filter *filter) {
 203     g_assert(primitive != NULL);
 204     g_assert(filter != NULL);
 205
 206     SPFeImage *sp_image = SP_FEIMAGE(primitive);
 207
 208     int primitive_n = filter->add_primitive(NR::NR_FILTER_IMAGE);
 209     NR::FilterPrimitive *nr_primitive = filter->get_primitive(primitive_n);
 210     NR::FilterImage *nr_image = dynamic_cast<NR::FilterImage*>(nr_primitive);
 211     g_assert(nr_image != NULL);
 212
 213     sp_filter_primitive_renderer_common(primitive, nr_primitive);
 214     nr_image->set_region(sp_image->x, sp_image->y, sp_image->width, sp_image->height);
 215     nr_image->set_href(sp_image->href);
 216 }
 217
 218 /*
 219   Local Variables:
 220   mode:c++
 221   c-file-style:"stroustrup"
 222   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 223   indent-tabs-mode:nil
 224   fill-column:99
 225   End:
 226 */
 227 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :