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         feConvolveMatrix->divisor=0;
  84         feConvolveMatrix->preserveAlpha = false;
  85         feConvolveMatrix->order.set("3 3");
  86 }
  87
  88 /**
  89  * Reads the Inkscape::XML::Node, and initializes SPFeConvolveMatrix 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_feConvolveMatrix_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
  95 {
  96     if (((SPObjectClass *) feConvolveMatrix_parent_class)->build) {
  97         ((SPObjectClass *) feConvolveMatrix_parent_class)->build(object, document, repr);
  98     }
  99
 100     /*LOAD ATTRIBUTES FROM REPR HERE*/
 101     sp_object_read_attr(object, "order");
 102     sp_object_read_attr(object, "kernelMatrix");
 103     sp_object_read_attr(object, "divisor");
 104     sp_object_read_attr(object, "bias");
 105     sp_object_read_attr(object, "targetX");
 106     sp_object_read_attr(object, "targetY");
 107     sp_object_read_attr(object, "edgeMode");
 108     sp_object_read_attr(object, "kernelUnitLength");
 109     sp_object_read_attr(object, "preserveAlpha");
 110
 111 }
 112
 113 /**
 114  * Drops any allocated memory.
 115  */
 116 static void
 117 sp_feConvolveMatrix_release(SPObject *object)
 118 {
 119     if (((SPObjectClass *) feConvolveMatrix_parent_class)->release)
 120         ((SPObjectClass *) feConvolveMatrix_parent_class)->release(object);
 121 }
 122
 123
 124 static std::vector<gdouble> read_kernel_matrix(const gchar* value, int size){
 125         std::vector<gdouble> v(size, (gdouble) 0);
 126         int i;
 127         gchar** values = g_strsplit(value , " ", size);
 128         for (i=0;i<size;i++)
 129                 v[i] = g_ascii_strtod(values[i], NULL);
 130         return v;
 131 }
 132
 133 static double
 134 sp_feConvolveMatrix_read_number(gchar const *value) {
 135     if (!value) return 0;
 136     char *end;
 137     double ret = g_ascii_strtod(value, &end);
 138     if (*end) {
 139         g_warning("Unable to convert \"%s\" to number", value);
 140         // We could leave this out, too. If strtod can't convert
 141         // anything, it will return zero.
 142         ret = 0;
 143     }
 144     return ret;
 145 }
 146
 147 static int sp_feConvolveMatrix_read_edgeMode(gchar const *value){
 148     if (!value) return 0; //duplicate is default
 149     switch(value[0]){
 150         case 'd':
 151             if (strncmp(value, "duplicate", 9) == 0) return 0;
 152             break;
 153         case 'w':
 154             if (strncmp(value, "wrap", 4) == 0) return 1;
 155             break;
 156         case 'n':
 157             if (strncmp(value, "none", 4) == 0) return 2;
 158             break;
 159     }
 160     return 0; //duplicate is default
 161 }
 162
 163
 164 static bool sp_feConvolveMatrix_read_bool(gchar const *value){
 165     if (!value) return false; //false is default
 166     switch(value[0]){
 167         case 't':
 168             if (strncmp(value, "true", 4) == 0) return true;
 169             break;
 170         case 'f':
 171             if (strncmp(value, "false", 5) == 0) return false;
 172             break;
 173     }
 174     return false; //false is default
 175 }
 176
 177 /**
 178  * Sets a specific value in the SPFeConvolveMatrix.
 179  */
 180 static void
 181 sp_feConvolveMatrix_set(SPObject *object, unsigned int key, gchar const *value)
 182 {
 183     SPFeConvolveMatrix *feConvolveMatrix = SP_FECONVOLVEMATRIX(object);
 184     (void)feConvolveMatrix;
 185     double read_num;
 186     int read_int;
 187     bool read_bool;
 188
 189     switch(key) {
 190         /*DEAL WITH SETTING ATTRIBUTES HERE*/
 191         case SP_ATTR_ORDER:
 192             feConvolveMatrix->order.set(value);
 193             object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
 194             break;
 195         case SP_ATTR_KERNELMATRIX:
 196             feConvolveMatrix->kernelMatrix = read_kernel_matrix(value, (int) (feConvolveMatrix->order.getNumber() * feConvolveMatrix->order.getOptNumber()));
 197             object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
 198             break;
 199         case SP_ATTR_DIVISOR:
 200             read_num = sp_feConvolveMatrix_read_number(value);
 201             if (read_num != feConvolveMatrix->divisor){
 202                 feConvolveMatrix->divisor = read_num;
 203                 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
 204             }
 205             break;
 206         case SP_ATTR_BIAS:
 207             read_num = sp_feConvolveMatrix_read_number(value);
 208             if (read_num != feConvolveMatrix->bias){
 209                 feConvolveMatrix->bias = read_num;
 210                 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
 211             }
 212             break;
 213         case SP_ATTR_TARGETX:
 214             read_int = (int) sp_feConvolveMatrix_read_number(value);
 215             if (read_int != feConvolveMatrix->targetX){
 216                 feConvolveMatrix->targetX = read_int;
 217                 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
 218             }
 219             break;
 220         case SP_ATTR_TARGETY:
 221             read_int = (int) sp_feConvolveMatrix_read_number(value);
 222             if (read_int != feConvolveMatrix->targetY){
 223                 feConvolveMatrix->targetY = read_int;
 224                 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
 225             }
 226             break;
 227         case SP_ATTR_EDGEMODE:
 228             read_int = (int) sp_feConvolveMatrix_read_edgeMode(value);
 229             if (read_int != feConvolveMatrix->edgeMode){
 230                 feConvolveMatrix->edgeMode = read_int;
 231                 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
 232             }
 233             break;
 234         case SP_ATTR_KERNELUNITLENGTH:
 235             feConvolveMatrix->kernelUnitLength.set(value);
 236             object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
 237             break;
 238         case SP_ATTR_PRESERVEALPHA:
 239             read_bool = sp_feConvolveMatrix_read_bool(value);
 240             if (read_bool != feConvolveMatrix->preserveAlpha){
 241                 feConvolveMatrix->preserveAlpha = read_bool;
 242                 object->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
 243             }
 244             break;
 245         default:
 246             if (((SPObjectClass *) feConvolveMatrix_parent_class)->set)
 247                 ((SPObjectClass *) feConvolveMatrix_parent_class)->set(object, key, value);
 248             break;
 249     }
 250
 251 }
 252
 253 /**
 254  * Receives update notifications.
 255  */
 256 static void
 257 sp_feConvolveMatrix_update(SPObject *object, SPCtx *ctx, guint flags)
 258 {
 259     if (flags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG |
 260                  SP_OBJECT_VIEWPORT_MODIFIED_FLAG)) {
 261
 262         /* do something to trigger redisplay, updates? */
 263
 264     }
 265
 266     if (((SPObjectClass *) feConvolveMatrix_parent_class)->update) {
 267         ((SPObjectClass *) feConvolveMatrix_parent_class)->update(object, ctx, flags);
 268     }
 269 }
 270
 271 /**
 272  * Writes its settings to an incoming repr object, if any.
 273  */
 274 static Inkscape::XML::Node *
 275 sp_feConvolveMatrix_write(SPObject *object, Inkscape::XML::Node *repr, guint flags)
 276 {
 277     // Inkscape-only object, not copied during an "plain SVG" dump:
 278     if (flags & SP_OBJECT_WRITE_EXT) {
 279         if (repr) {
 280             // is this sane?
 281             repr->mergeFrom(SP_OBJECT_REPR(object), "id");
 282         } else {
 283             repr = SP_OBJECT_REPR(object)->duplicate(NULL); // FIXME
 284         }
 285     }
 286
 287     if (((SPObjectClass *) feConvolveMatrix_parent_class)->write) {
 288         ((SPObjectClass *) feConvolveMatrix_parent_class)->write(object, repr, flags);
 289     }
 290
 291     return repr;
 292 }
 293
 294 static void sp_feConvolveMatrix_build_renderer(SPFilterPrimitive *primitive, NR::Filter *filter) {
 295     g_assert(primitive != NULL);
 296     g_assert(filter != NULL);
 297
 298     SPFeConvolveMatrix *sp_convolve = SP_FECONVOLVEMATRIX(primitive);
 299
 300     int primitive_n = filter->add_primitive(NR::NR_FILTER_CONVOLVEMATRIX);
 301     NR::FilterPrimitive *nr_primitive = filter->get_primitive(primitive_n);
 302     NR::FilterConvolveMatrix *nr_convolve = dynamic_cast<NR::FilterConvolveMatrix*>(nr_primitive);
 303     g_assert(nr_convolve != NULL);
 304
 305     sp_filter_primitive_renderer_common(primitive, nr_primitive);
 306
 307     nr_convolve->set_targetX(sp_convolve->targetX);
 308     nr_convolve->set_targetY(sp_convolve->targetY);
 309     nr_convolve->set_orderX( (int)sp_convolve->order.getNumber() );
 310     nr_convolve->set_orderY( (int)sp_convolve->order.getOptNumber() );
 311     nr_convolve->set_kernelMatrix(sp_convolve->kernelMatrix);
 312     nr_convolve->set_divisor(sp_convolve->divisor);
 313     nr_convolve->set_bias(sp_convolve->bias);
 314
 315 }
 316 /*
 317   Local Variables:
 318   mode:c++
 319   c-file-style:"stroustrup"
 320   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 321   indent-tabs-mode:nil
 322   fill-column:99
 323   End:
 324 */
 325 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :