src/sp-feconvolvematrix.cpp

   1 #define __SP_FECONVOLVEMATRIX_CPP__
   2
   3 /** \file
   4  * SVG <feConvolveMatrix> 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) 2006 Hugo Rodrigues
  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 <vector>
  22 #include "attributes.h"
  23 #include "svg/svg.h"
  24 #include "sp-feconvolvematrix.h"
  25 #include "helper-fns.h"
  26 #include "xml/repr.h"
  27 #include "display/nr-filter-convolve-matrix.h"
  28
  29 /* FeConvolveMatrix base class */
  30
  31 static void sp_feConvolveMatrix_class_init(SPFeConvolveMatrixClass *klass);
  32 static void sp_feConvolveMatrix_init(SPFeConvolveMatrix *feConvolveMatrix);
  33
  34 static void sp_feConvolveMatrix_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);
  35 static void sp_feConvolveMatrix_release(SPObject *object);
  36 static void sp_feConvolveMatrix_set(SPObject *object, unsigned int key, gchar const *value);
  37 static void sp_feConvolveMatrix_update(SPObject *object, SPCtx *ctx, guint flags);
  38 static Inkscape::XML::Node *sp_feConvolveMatrix_write(SPObject *object, Inkscape::XML::Node *repr, guint flags);
  39 static void sp_feConvolveMatrix_build_renderer(SPFilterPrimitive *primitive, NR::Filter *filter);
  40
  41 static SPFilterPrimitiveClass *feConvolveMatrix_parent_class;
  42
  43 GType
  44 sp_feConvolveMatrix_get_type()
  45 {
  46     static GType feConvolveMatrix_type = 0;
  47
  48     if (!feConvolveMatrix_type) {
  49         GTypeInfo feConvolveMatrix_info = {
  50             sizeof(SPFeConvolveMatrixClass),
  51             NULL, NULL,
  52             (GClassInitFunc) sp_feConvolveMatrix_class_init,
  53             NULL, NULL,
  54             sizeof(SPFeConvolveMatrix),
  55             16,
  56             (GInstanceInitFunc) sp_feConvolveMatrix_init,
  57             NULL,    /* value_table */
  58         };
  59         feConvolveMatrix_type = g_type_register_static(SP_TYPE_FILTER_PRIMITIVE, "SPFeConvolveMatrix", &feConvolveMatrix_info, (GTypeFlags)0);
  60     }
  61     return feConvolveMatrix_type;
  62 }
  63
  64 static void
  65 sp_feConvolveMatrix_class_init(SPFeConvolveMatrixClass *klass)
  66 {
  67     SPObjectClass *sp_object_class = (SPObjectClass *)klass;
  68     SPFilterPrimitiveClass *sp_primitive_class = (SPFilterPrimitiveClass *)klass;
  69
  70     feConvolveMatrix_parent_class = (SPFilterPrimitiveClass*)g_type_class_peek_parent(klass);
  71
  72     sp_object_class->build = sp_feConvolveMatrix_build;
  73     sp_object_class->release = sp_feConvolveMatrix_release;
  74     sp_object_class->write = sp_feConvolveMatrix_write;
  75     sp_object_class->set = sp_feConvolveMatrix_set;
  76     sp_object_class->update = sp_feConvolveMatrix_update;
  77
  78     sp_primitive_class->build_renderer = sp_feConvolveMatrix_build_renderer;
  79 }
  80
  81 static void
  82 sp_feConvolveMatrix_init(SPFeConvolveMatrix *feConvolveMatrix)
  83 {}
  84
  85 /**
  86  * Reads the Inkscape::XML::Node, and initializes SPFeConvolveMatrix variables.  For this to get called,
  87  * our name must be associated with a repr via "sp_object_type_register".  Best done through
  88  * sp-object-repr.cpp's repr_name_entries array.
  89  */
  90 static void
  91 sp_feConvolveMatrix_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
  92 {
  93     if (((SPObjectClass *) feConvolveMatrix_parent_class)->build) {
  94         ((SPObjectClass *) feConvolveMatrix_parent_class)->build(object, document, repr);
  95     }
  96
  97     /*LOAD ATTRIBUTES FROM REPR HERE*/
  98     sp_object_read_attr(object, "order");
  99     sp_object_read_attr(object, "kernelMatrix");
 100     sp_object_read_attr(object, "divisor");
 101     sp_object_read_attr(object, "bias");
 102     sp_object_read_attr(object, "targetX");
 103     sp_object_read_attr(object, "targetY");
 104     sp_object_read_attr(object, "edgeMode");
 105     sp_object_read_attr(object, "kernelUnitLength");
 106     sp_object_read_attr(object, "preserveAlpha");
 107
 108 }
 109
 110 /**
 111  * Drops any allocated memory.
 112  */
 113 static void
 114 sp_feConvolveMatrix_release(SPObject *object)
 115 {
 116     if (((SPObjectClass *) feConvolveMatrix_parent_class)->release)
 117         ((SPObjectClass *) feConvolveMatrix_parent_class)->release(object);
 118 }
 119
 120 static std::vector<gdouble> read_kernel_matrix(const gchar* value, int size){
 121         std::vector<gdouble> v(size, (gdouble) 0);
 122         int i;
 123         gchar** values = g_strsplit(value , " ", size);
 124         for (i=0;i<size;i++)
 125                 v[i] = g_ascii_strtod(values[i], NULL);
 126         return v;
 127 }
 128
 129 static int sp_feConvolveMatrix_read_edgeMode(gchar const *value){
 130     if (!value) return 0; //duplicate is default
 131     switch(value[0]){
 132         case 'd':
 133             if (strncmp(value, "duplicate", 9) == 0) return 0;
 134             break;
 135         case 'w':
 136             if (strncmp(value, "wrap", 4) == 0) return 1;
 137             break;
 138         case 'n':
 139             if (strncmp(value, "none", 4) == 0) return 2;
 140             break;
 141     }
 142     return 0; //duplicate is default
 143 }
 144
 145 /**
 146  * Sets a specific value in the SPFeConvolveMatrix.
 147  */
 148 static void
 149 sp_feConvolveMatrix_set(SPObject *object, unsigned int key, gchar const *value)
 150 {
 151     SPFeConvolveMatrix *feConvolveMatrix = SP_FECONVOLVEMATRIX(object);
 152     (void)feConvolveMatrix;
 153     double read_num;
 154     int read_int;
 155     bool read_bool;
 156
 157     switch(key) {
 158         /*DEAL WITH SETTING ATTRIBUTES HERE*/
 159         case SP_ATTR_ORDER:
 160             feConvolveMatrix->order.set(value);
 161             //From SVG spec: If <orderY> is not provided, it defaults to <orderX>.
 162             if (feConvolveMatrix->order.optNumIsSet() == false)
 163                 feConvolveMatrix->order.setOptNumber(feConvolveMatrix->order.getNumber());
 164             object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
 165             break;
 166         case SP_ATTR_KERNELMATRIX:
 167             feConvolveMatrix->kernelMatrix = read_kernel_matrix(value, (int) (feConvolveMatrix->order.getNumber() * feConvolveMatrix->order.getOptNumber()));
 168             object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
 169             break;
 170         case SP_ATTR_DIVISOR:
 171             read_num = helperfns_read_number(value);
 172             if (read_num != feConvolveMatrix->divisor){
 173                 feConvolveMatrix->divisor = read_num;
 174                 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
 175             }
 176             break;
 177         case SP_ATTR_BIAS:
 178             read_num = helperfns_read_number(value);
 179             if (read_num != feConvolveMatrix->bias){
 180                 feConvolveMatrix->bias = read_num;
 181                 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
 182             }
 183             break;
 184         case SP_ATTR_TARGETX:
 185             read_int = (int) helperfns_read_number(value);
 186             if (read_int != feConvolveMatrix->targetX){
 187                 feConvolveMatrix->targetX = read_int;
 188                 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
 189             }
 190             break;
 191         case SP_ATTR_TARGETY:
 192             read_int = (int) helperfns_read_number(value);
 193             if (read_int != feConvolveMatrix->targetY){
 194                 feConvolveMatrix->targetY = read_int;
 195                 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
 196             }
 197             break;
 198         case SP_ATTR_EDGEMODE:
 199             read_int = (int) sp_feConvolveMatrix_read_edgeMode(value);
 200             if (read_int != feConvolveMatrix->edgeMode){
 201                 feConvolveMatrix->edgeMode = read_int;
 202                 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
 203             }
 204             break;
 205         case SP_ATTR_KERNELUNITLENGTH:
 206             feConvolveMatrix->kernelUnitLength.set(value);
 207             object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
 208             break;
 209         case SP_ATTR_PRESERVEALPHA:
 210             read_bool = helperfns_read_bool(value, false);
 211             if (read_bool != feConvolveMatrix->preserveAlpha){
 212                 feConvolveMatrix->preserveAlpha = read_bool;
 213                 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
 214             }
 215             break;
 216         default:
 217             if (((SPObjectClass *) feConvolveMatrix_parent_class)->set)
 218                 ((SPObjectClass *) feConvolveMatrix_parent_class)->set(object, key, value);
 219             break;
 220     }
 221
 222 }
 223
 224 /**
 225  * Receives update notifications.
 226  */
 227 static void
 228 sp_feConvolveMatrix_update(SPObject *object, SPCtx *ctx, guint flags)
 229 {
 230     if (flags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG |
 231                  SP_OBJECT_VIEWPORT_MODIFIED_FLAG)) {
 232
 233         /* do something to trigger redisplay, updates? */
 234
 235     }
 236
 237     if (((SPObjectClass *) feConvolveMatrix_parent_class)->update) {
 238         ((SPObjectClass *) feConvolveMatrix_parent_class)->update(object, ctx, flags);
 239     }
 240 }
 241
 242 /**
 243  * Writes its settings to an incoming repr object, if any.
 244  */
 245 static Inkscape::XML::Node *
 246 sp_feConvolveMatrix_write(SPObject *object, Inkscape::XML::Node *repr, guint flags)
 247 {
 248     // Inkscape-only object, not copied during an "plain SVG" dump:
 249     if (flags & SP_OBJECT_WRITE_EXT) {
 250         if (repr) {
 251             // is this sane?
 252             repr->mergeFrom(SP_OBJECT_REPR(object), "id");
 253         } else {
 254             repr = SP_OBJECT_REPR(object)->duplicate(NULL); // FIXME
 255         }
 256     }
 257
 258     if (((SPObjectClass *) feConvolveMatrix_parent_class)->write) {
 259         ((SPObjectClass *) feConvolveMatrix_parent_class)->write(object, repr, flags);
 260     }
 261
 262     return repr;
 263 }
 264
 265 static void sp_feConvolveMatrix_build_renderer(SPFilterPrimitive *primitive, NR::Filter *filter) {
 266     g_assert(primitive != NULL);
 267     g_assert(filter != NULL);
 268
 269     SPFeConvolveMatrix *sp_convolve = SP_FECONVOLVEMATRIX(primitive);
 270
 271     int primitive_n = filter->add_primitive(NR::NR_FILTER_CONVOLVEMATRIX);
 272     NR::FilterPrimitive *nr_primitive = filter->get_primitive(primitive_n);
 273     NR::FilterConvolveMatrix *nr_convolve = dynamic_cast<NR::FilterConvolveMatrix*>(nr_primitive);
 274     g_assert(nr_convolve != NULL);
 275
 276     sp_filter_primitive_renderer_common(primitive, nr_primitive);
 277
 278     nr_convolve->set_targetX(sp_convolve->targetX);
 279     nr_convolve->set_targetY(sp_convolve->targetY);
 280     nr_convolve->set_orderX( (int)sp_convolve->order.getNumber() );
 281     nr_convolve->set_orderY( (int)sp_convolve->order.getOptNumber() );
 282     nr_convolve->set_kernelMatrix(sp_convolve->kernelMatrix);
 283     nr_convolve->set_divisor(sp_convolve->divisor);
 284     nr_convolve->set_bias(sp_convolve->bias);
 285
 286 }
 287 /*
 288   Local Variables:
 289   mode:c++
 290   c-file-style:"stroustrup"
 291   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 292   indent-tabs-mode:nil
 293   fill-column:99
 294   End:
 295 */
 296 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :