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 /* apparently there's no attribute to load here
 102 since 'in' and 'xlink:href' are common filter attributes.
 103 --Juca
 104 */
 105     sp_object_read_attr(object, "x");
 106     sp_object_read_attr(object, "y");
 107     sp_object_read_attr(object, "width");
 108     sp_object_read_attr(object, "height");
 109
 110 }
 111
 112 /**
 113  * Drops any allocated memory.
 114  */
 115 static void
 116 sp_feImage_release(SPObject *object)
 117 {
 118
 119     if (((SPObjectClass *) feImage_parent_class)->release)
 120         ((SPObjectClass *) feImage_parent_class)->release(object);
 121 }
 122
 123 /**
 124  * Sets a specific value in the SPFeImage.
 125  */
 126 static void
 127 sp_feImage_set(SPObject *object, unsigned int key, gchar const *value)
 128 {
 129     SPFeImage *feImage = SP_FEIMAGE(object);
 130     (void)feImage;
 131
 132     switch(key) {
 133         /*DEAL WITH SETTING ATTRIBUTES HERE*/
 134         case SP_ATTR_X:
 135             feImage->x.readOrUnset(value);
 136             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 137             break;
 138         case SP_ATTR_Y:
 139             feImage->y.readOrUnset(value);
 140             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 141             break;
 142         case SP_ATTR_WIDTH:
 143             feImage->width.readOrUnset(value);
 144             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 145             break;
 146         case SP_ATTR_HEIGHT:
 147             feImage->height.readOrUnset(value);
 148             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 149             break;
 150         default:
 151             if (((SPObjectClass *) feImage_parent_class)->set)
 152                 ((SPObjectClass *) feImage_parent_class)->set(object, key, value);
 153             break;
 154     }
 155
 156 }
 157
 158 /**
 159  * Receives update notifications.
 160  */
 161 static void
 162 sp_feImage_update(SPObject *object, SPCtx *ctx, guint flags)
 163 {
 164
 165     if (flags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG |
 166                  SP_OBJECT_VIEWPORT_MODIFIED_FLAG)) {
 167
 168         /* do something to trigger redisplay, updates? */
 169     }
 170
 171     if (((SPObjectClass *) feImage_parent_class)->update) {
 172         ((SPObjectClass *) feImage_parent_class)->update(object, ctx, flags);
 173     }
 174 }
 175
 176 /**
 177  * Writes its settings to an incoming repr object, if any.
 178  */
 179 static Inkscape::XML::Node *
 180 sp_feImage_write(SPObject *object, Inkscape::XML::Node *repr, guint flags)
 181 {
 182     // Inkscape-only object, not copied during an "plain SVG" dump:
 183     if (flags & SP_OBJECT_WRITE_EXT) {
 184         if (repr) {
 185             // is this sane?
 186             repr->mergeFrom(SP_OBJECT_REPR(object), "id");
 187         } else {
 188             repr = SP_OBJECT_REPR(object)->duplicate(NULL); // FIXME
 189         }
 190     }
 191
 192     if (((SPObjectClass *) feImage_parent_class)->write) {
 193         ((SPObjectClass *) feImage_parent_class)->write(object, repr, flags);
 194     }
 195
 196     return repr;
 197 }
 198
 199 static void sp_feImage_build_renderer(SPFilterPrimitive *primitive, NR::Filter *filter) {
 200     g_assert(primitive != NULL);
 201     g_assert(filter != NULL);
 202
 203     SPFeImage *sp_image = SP_FEIMAGE(primitive);
 204
 205     int primitive_n = filter->add_primitive(NR::NR_FILTER_IMAGE);
 206     NR::FilterPrimitive *nr_primitive = filter->get_primitive(primitive_n);
 207     NR::FilterImage *nr_image = dynamic_cast<NR::FilterImage*>(nr_primitive);
 208     g_assert(nr_image != NULL);
 209
 210     sp_filter_primitive_renderer_common(primitive, nr_primitive);
 211     nr_image->set_region(sp_image->x, sp_image->y, sp_image->width, sp_image->height);
 212 }
 213
 214 /*
 215   Local Variables:
 216   mode:c++
 217   c-file-style:"stroustrup"
 218   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 219   indent-tabs-mode:nil
 220   fill-column:99
 221   End:
 222 */
 223 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :