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 "xml/repr.h"
  26 #include "display/nr-filter-convolve-matrix.h"
  27
  28 /* FeConvolveMatrix base class */
  29
  30 static void sp_feConvolveMatrix_class_init(SPFeConvolveMatrixClass *klass);
  31 static void sp_feConvolveMatrix_init(SPFeConvolveMatrix *feConvolveMatrix);
  32
  33 static void sp_feConvolveMatrix_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);
  34 static void sp_feConvolveMatrix_release(SPObject *object);
  35 static void sp_feConvolveMatrix_set(SPObject *object, unsigned int key, gchar const *value);
  36 static void sp_feConvolveMatrix_update(SPObject *object, SPCtx *ctx, guint flags);
  37 static Inkscape::XML::Node *sp_feConvolveMatrix_write(SPObject *object, Inkscape::XML::Node *repr, guint flags);
  38 static void sp_feConvolveMatrix_build_renderer(SPFilterPrimitive *primitive, NR::Filter *filter);
  39
  40 static SPFilterPrimitiveClass *feConvolveMatrix_parent_class;
  41
  42 GType
  43 sp_feConvolveMatrix_get_type()
  44 {
  45     static GType feConvolveMatrix_type = 0;
  46
  47     if (!feConvolveMatrix_type) {
  48         GTypeInfo feConvolveMatrix_info = {
  49             sizeof(SPFeConvolveMatrixClass),
  50             NULL, NULL,
  51             (GClassInitFunc) sp_feConvolveMatrix_class_init,
  52             NULL, NULL,
  53             sizeof(SPFeConvolveMatrix),
  54             16,
  55             (GInstanceInitFunc) sp_feConvolveMatrix_init,
  56             NULL,    /* value_table */
  57         };
  58         feConvolveMatrix_type = g_type_register_static(SP_TYPE_FILTER_PRIMITIVE, "SPFeConvolveMatrix", &feConvolveMatrix_info, (GTypeFlags)0);
  59     }
  60     return feConvolveMatrix_type;
  61 }
  62
  63 static void
  64 sp_feConvolveMatrix_class_init(SPFeConvolveMatrixClass *klass)
  65 {
  66     SPObjectClass *sp_object_class = (SPObjectClass *)klass;
  67     SPFilterPrimitiveClass *sp_primitive_class = (SPFilterPrimitiveClass *)klass;
  68
  69     feConvolveMatrix_parent_class = (SPFilterPrimitiveClass*)g_type_class_peek_parent(klass);
  70
  71     sp_object_class->build = sp_feConvolveMatrix_build;
  72     sp_object_class->release = sp_feConvolveMatrix_release;
  73     sp_object_class->write = sp_feConvolveMatrix_write;
  74     sp_object_class->set = sp_feConvolveMatrix_set;
  75     sp_object_class->update = sp_feConvolveMatrix_update;
  76
  77     sp_primitive_class->build_renderer = sp_feConvolveMatrix_build_renderer;
  78 }
  79
  80 static void
  81 sp_feConvolveMatrix_init(SPFeConvolveMatrix *feConvolveMatrix)
  82 {}
  83
  84 /**
  85  * Reads the Inkscape::XML::Node, and initializes SPFeConvolveMatrix variables.  For this to get called,
  86  * our name must be associated with a repr via "sp_object_type_register".  Best done through
  87  * sp-object-repr.cpp's repr_name_entries array.
  88  */
  89 static void
  90 sp_feConvolveMatrix_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
  91 {
  92     if (((SPObjectClass *) feConvolveMatrix_parent_class)->build) {
  93         ((SPObjectClass *) feConvolveMatrix_parent_class)->build(object, document, repr);
  94     }
  95
  96     /*LOAD ATTRIBUTES FROM REPR HERE*/
  97     sp_object_read_attr(object, "order");
  98     sp_object_read_attr(object, "kernelMatrix");
  99     sp_object_read_attr(object, "divisor");
 100     sp_object_read_attr(object, "bias");
 101     sp_object_read_attr(object, "targetX");
 102     sp_object_read_attr(object, "targetY");
 103     sp_object_read_attr(object, "edgeMode");
 104     sp_object_read_attr(object, "kernelUnitLength");
 105     sp_object_read_attr(object, "preserveAlpha");
 106
 107 }
 108
 109 /**
 110  * Drops any allocated memory.
 111  */
 112 static void
 113 sp_feConvolveMatrix_release(SPObject *object)
 114 {
 115     if (((SPObjectClass *) feConvolveMatrix_parent_class)->release)
 116         ((SPObjectClass *) feConvolveMatrix_parent_class)->release(object);
 117 }
 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 double
 130 sp_feConvolveMatrix_read_number(gchar const *value) {
 131     if (!value) return 0;
 132     char *end;
 133     double ret = g_ascii_strtod(value, &end);
 134     if (*end) {
 135         g_warning("Unable to convert \"%s\" to number", value);
 136         // We could leave this out, too. If strtod can't convert
 137         // anything, it will return zero.
 138         ret = 0;
 139     }
 140     return ret;
 141 }
 142
 143 static int sp_feConvolveMatrix_read_edgeMode(gchar const *value){
 144     if (!value) return 0; //duplicate is default
 145     switch(value[0]){
 146         case 'd':
 147             if (strncmp(value, "duplicate", 9) == 0) return 0;
 148             break;
 149         case 'w':
 150             if (strncmp(value, "wrap", 4) == 0) return 1;
 151             break;
 152         case 'n':
 153             if (strncmp(value, "none", 4) == 0) return 2;
 154             break;
 155     }
 156     return 0; //duplicate is default
 157 }
 158
 159
 160 static bool sp_feConvolveMatrix_read_bool(gchar const *value){
 161     if (!value) return false; //false is default
 162     switch(value[0]){
 163         case 't':
 164             if (strncmp(value, "true", 4) == 0) return true;
 165             break;
 166         case 'f':
 167             if (strncmp(value, "false", 5) == 0) return false;
 168             break;
 169     }
 170     return false; //false is default
 171 }
 172
 173 /**
 174  * Sets a specific value in the SPFeConvolveMatrix.
 175  */
 176 static void
 177 sp_feConvolveMatrix_set(SPObject *object, unsigned int key, gchar const *value)
 178 {
 179     SPFeConvolveMatrix *feConvolveMatrix = SP_FECONVOLVEMATRIX(object);
 180     (void)feConvolveMatrix;
 181     double read_num;
 182     int read_int;
 183     bool read_bool;
 184
 185     switch(key) {
 186         /*DEAL WITH SETTING ATTRIBUTES HERE*/
 187         case SP_ATTR_ORDER:
 188             feConvolveMatrix->order.set(value);
 189             //From SVG spec: If <orderY> is not provided, it defaults to <orderX>.
 190             if (feConvolveMatrix->order.optNumIsSet() == false)
 191                 feConvolveMatrix->order.setOptNumber(feConvolveMatrix->order.getNumber());
 192             object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
 193             break;
 194         case SP_ATTR_KERNELMATRIX:
 195             feConvolveMatrix->kernelMatrix = read_kernel_matrix(value, (int) (feConvolveMatrix->order.getNumber() * feConvolveMatrix->order.getOptNumber()));
 196             object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
 197             break;
 198         case SP_ATTR_DIVISOR:
 199             read_num = sp_feConvolveMatrix_read_number(value);
 200             if (read_num != feConvolveMatrix->divisor){
 201                 feConvolveMatrix->divisor = read_num;
 202                 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
 203             }
 204             break;
 205         case SP_ATTR_BIAS:
 206             read_num = sp_feConvolveMatrix_read_number(value);
 207             if (read_num != feConvolveMatrix->bias){
 208                 feConvolveMatrix->bias = read_num;
 209                 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
 210             }
 211             break;
 212         case SP_ATTR_TARGETX:
 213             read_int = (int) sp_feConvolveMatrix_read_number(value);
 214             if (read_int != feConvolveMatrix->targetX){
 215                 feConvolveMatrix->targetX = read_int;
 216                 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
 217             }
 218             break;
 219         case SP_ATTR_TARGETY:
 220             read_int = (int) sp_feConvolveMatrix_read_number(value);
 221             if (read_int != feConvolveMatrix->targetY){
 222                 feConvolveMatrix->targetY = read_int;
 223                 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
 224             }
 225             break;
 226         case SP_ATTR_EDGEMODE:
 227             read_int = (int) sp_feConvolveMatrix_read_edgeMode(value);
 228             if (read_int != feConvolveMatrix->edgeMode){
 229                 feConvolveMatrix->edgeMode = read_int;
 230                 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
 231             }
 232             break;
 233         case SP_ATTR_KERNELUNITLENGTH:
 234             feConvolveMatrix->kernelUnitLength.set(value);
 235             object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
 236             break;
 237         case SP_ATTR_PRESERVEALPHA:
 238             read_bool = sp_feConvolveMatrix_read_bool(value);
 239             if (read_bool != feConvolveMatrix->preserveAlpha){
 240                 feConvolveMatrix->preserveAlpha = read_bool;
 241                 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
 242             }
 243             break;
 244         default:
 245             if (((SPObjectClass *) feConvolveMatrix_parent_class)->set)
 246                 ((SPObjectClass *) feConvolveMatrix_parent_class)->set(object, key, value);
 247             break;
 248     }
 249
 250 }
 251
 252 /**
 253  * Receives update notifications.
 254  */
 255 static void
 256 sp_feConvolveMatrix_update(SPObject *object, SPCtx *ctx, guint flags)
 257 {
 258     if (flags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG |
 259                  SP_OBJECT_VIEWPORT_MODIFIED_FLAG)) {
 260
 261         /* do something to trigger redisplay, updates? */
 262
 263     }
 264
 265     if (((SPObjectClass *) feConvolveMatrix_parent_class)->update) {
 266         ((SPObjectClass *) feConvolveMatrix_parent_class)->update(object, ctx, flags);
 267     }
 268 }
 269
 270 /**
 271  * Writes its settings to an incoming repr object, if any.
 272  */
 273 static Inkscape::XML::Node *
 274 sp_feConvolveMatrix_write(SPObject *object, Inkscape::XML::Node *repr, guint flags)
 275 {
 276     // Inkscape-only object, not copied during an "plain SVG" dump:
 277     if (flags & SP_OBJECT_WRITE_EXT) {
 278         if (repr) {
 279             // is this sane?
 280             repr->mergeFrom(SP_OBJECT_REPR(object), "id");
 281         } else {
 282             repr = SP_OBJECT_REPR(object)->duplicate(NULL); // FIXME
 283         }
 284     }
 285
 286     if (((SPObjectClass *) feConvolveMatrix_parent_class)->write) {
 287         ((SPObjectClass *) feConvolveMatrix_parent_class)->write(object, repr, flags);
 288     }
 289
 290     return repr;
 291 }
 292
 293 static void sp_feConvolveMatrix_build_renderer(SPFilterPrimitive *primitive, NR::Filter *filter) {
 294     g_assert(primitive != NULL);
 295     g_assert(filter != NULL);
 296
 297     SPFeConvolveMatrix *sp_convolve = SP_FECONVOLVEMATRIX(primitive);
 298
 299     int primitive_n = filter->add_primitive(NR::NR_FILTER_CONVOLVEMATRIX);
 300     NR::FilterPrimitive *nr_primitive = filter->get_primitive(primitive_n);
 301     NR::FilterConvolveMatrix *nr_convolve = dynamic_cast<NR::FilterConvolveMatrix*>(nr_primitive);
 302     g_assert(nr_convolve != NULL);
 303
 304     sp_filter_primitive_renderer_common(primitive, nr_primitive);
 305
 306     nr_convolve->set_targetX(sp_convolve->targetX);
 307     nr_convolve->set_targetY(sp_convolve->targetY);
 308     nr_convolve->set_orderX( (int)sp_convolve->order.getNumber() );
 309     nr_convolve->set_orderY( (int)sp_convolve->order.getOptNumber() );
 310     nr_convolve->set_kernelMatrix(sp_convolve->kernelMatrix);
 311     nr_convolve->set_divisor(sp_convolve->divisor);
 312     nr_convolve->set_bias(sp_convolve->bias);
 313
 314 }
 315 /*
 316   Local Variables:
 317   mode:c++
 318   c-file-style:"stroustrup"
 319   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 320   indent-tabs-mode:nil
 321   fill-column:99
 322   End:
 323 */
 324 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :