src/flood-context.cpp

   1 #define __SP_FLOOD_CONTEXT_C__
   2
   3 /*
   4 * Flood fill drawing context
   5 *
   6 * Author:
   7 *   Lauris Kaplinski <lauris@kaplinski.com>
   8 *   bulia byak <buliabyak@users.sf.net>
   9 *   John Bintz <jcoswell@coswellproductions.org>
  10 *
  11 * Copyright (C) 2006      Johan Engelen <johan@shouraizou.nl>
  12 * Copyright (C) 2000-2005 authors
  13 * Copyright (C) 2000-2001 Ximian, Inc.
  14 *
  15 * Released under GNU GPL, read the file 'COPYING' for more information
  16 */
  17
  18 #include "config.h"
  19
  20 #include <gdk/gdkkeysyms.h>
  21 #include <queue>
  22
  23 #include "macros.h"
  24 #include "display/sp-canvas.h"
  25 #include "document.h"
  26 #include "sp-namedview.h"
  27 #include "sp-object.h"
  28 #include "sp-rect.h"
  29 #include "selection.h"
  30 #include "desktop-handles.h"
  31 #include "desktop.h"
  32 #include "desktop-style.h"
  33 #include "message-stack.h"
  34 #include "message-context.h"
  35 #include "pixmaps/cursor-paintbucket.xpm"
  36 #include "flood-context.h"
  37 #include "sp-metrics.h"
  38 #include <glibmm/i18n.h>
  39 #include "object-edit.h"
  40 #include "xml/repr.h"
  41 #include "xml/node-event-vector.h"
  42 #include "prefs-utils.h"
  43 #include "context-fns.h"
  44 #include "rubberband.h"
  45
  46 #include "display/nr-arena-item.h"
  47 #include "display/nr-arena.h"
  48 #include "display/nr-arena-image.h"
  49 #include "display/canvas-arena.h"
  50 #include "libnr/nr-pixops.h"
  51 #include "libnr/nr-matrix-translate-ops.h"
  52 #include "libnr/nr-scale-ops.h"
  53 #include "libnr/nr-scale-translate-ops.h"
  54 #include "libnr/nr-translate-matrix-ops.h"
  55 #include "libnr/nr-translate-scale-ops.h"
  56 #include "libnr/nr-matrix-ops.h"
  57 #include "sp-item.h"
  58 #include "sp-root.h"
  59 #include "sp-defs.h"
  60 #include "sp-path.h"
  61 #include "splivarot.h"
  62 #include "livarot/Path.h"
  63 #include "livarot/Shape.h"
  64 #include "libnr/n-art-bpath.h"
  65 #include "svg/svg.h"
  66 #include "color.h"
  67
  68 #include "trace/trace.h"
  69 #include "trace/potrace/inkscape-potrace.h"
  70
  71 static void sp_flood_context_class_init(SPFloodContextClass *klass);
  72 static void sp_flood_context_init(SPFloodContext *flood_context);
  73 static void sp_flood_context_dispose(GObject *object);
  74
  75 static void sp_flood_context_setup(SPEventContext *ec);
  76
  77 static gint sp_flood_context_root_handler(SPEventContext *event_context, GdkEvent *event);
  78 static gint sp_flood_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event);
  79
  80 static void sp_flood_finish(SPFloodContext *rc);
  81
  82 static SPEventContextClass *parent_class;
  83
  84
  85 GtkType sp_flood_context_get_type()
  86 {
  87     static GType type = 0;
  88     if (!type) {
  89         GTypeInfo info = {
  90             sizeof(SPFloodContextClass),
  91             NULL, NULL,
  92             (GClassInitFunc) sp_flood_context_class_init,
  93             NULL, NULL,
  94             sizeof(SPFloodContext),
  95             4,
  96             (GInstanceInitFunc) sp_flood_context_init,
  97             NULL,    /* value_table */
  98         };
  99         type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPFloodContext", &info, (GTypeFlags) 0);
 100     }
 101     return type;
 102 }
 103
 104 static void sp_flood_context_class_init(SPFloodContextClass *klass)
 105 {
 106     GObjectClass *object_class = (GObjectClass *) klass;
 107     SPEventContextClass *event_context_class = (SPEventContextClass *) klass;
 108
 109     parent_class = (SPEventContextClass *) g_type_class_peek_parent(klass);
 110
 111     object_class->dispose = sp_flood_context_dispose;
 112
 113     event_context_class->setup = sp_flood_context_setup;
 114     event_context_class->root_handler  = sp_flood_context_root_handler;
 115     event_context_class->item_handler  = sp_flood_context_item_handler;
 116 }
 117
 118 static void sp_flood_context_init(SPFloodContext *flood_context)
 119 {
 120     SPEventContext *event_context = SP_EVENT_CONTEXT(flood_context);
 121
 122     event_context->cursor_shape = cursor_paintbucket_xpm;
 123     event_context->hot_x = 11;
 124     event_context->hot_y = 30;
 125     event_context->xp = 0;
 126     event_context->yp = 0;
 127     event_context->tolerance = 0;
 128     event_context->within_tolerance = false;
 129     event_context->item_to_select = NULL;
 130
 131     event_context->shape_repr = NULL;
 132     event_context->shape_knot_holder = NULL;
 133
 134     flood_context->item = NULL;
 135
 136     new (&flood_context->sel_changed_connection) sigc::connection();
 137 }
 138
 139 static void sp_flood_context_dispose(GObject *object)
 140 {
 141     SPFloodContext *rc = SP_FLOOD_CONTEXT(object);
 142     SPEventContext *ec = SP_EVENT_CONTEXT(object);
 143
 144     rc->sel_changed_connection.disconnect();
 145     rc->sel_changed_connection.~connection();
 146
 147     /* fixme: This is necessary because we do not grab */
 148     if (rc->item) {
 149         sp_flood_finish(rc);
 150     }
 151
 152     if (ec->shape_repr) { // remove old listener
 153         sp_repr_remove_listener_by_data(ec->shape_repr, ec);
 154         Inkscape::GC::release(ec->shape_repr);
 155         ec->shape_repr = 0;
 156     }
 157
 158     if (rc->_message_context) {
 159         delete rc->_message_context;
 160     }
 161
 162     G_OBJECT_CLASS(parent_class)->dispose(object);
 163 }
 164
 165 static Inkscape::XML::NodeEventVector ec_shape_repr_events = {
 166     NULL, /* child_added */
 167     NULL, /* child_removed */
 168     ec_shape_event_attr_changed,
 169     NULL, /* content_changed */
 170     NULL  /* order_changed */
 171 };
 172
 173 /**
 174 \brief  Callback that processes the "changed" signal on the selection;
 175 destroys old and creates new knotholder
 176 */
 177 void sp_flood_context_selection_changed(Inkscape::Selection *selection, gpointer data)
 178 {
 179     SPFloodContext *rc = SP_FLOOD_CONTEXT(data);
 180     SPEventContext *ec = SP_EVENT_CONTEXT(rc);
 181
 182     if (ec->shape_repr) { // remove old listener
 183         sp_repr_remove_listener_by_data(ec->shape_repr, ec);
 184         Inkscape::GC::release(ec->shape_repr);
 185         ec->shape_repr = 0;
 186     }
 187
 188     SPItem *item = selection->singleItem();
 189     if (item) {
 190         Inkscape::XML::Node *shape_repr = SP_OBJECT_REPR(item);
 191         if (shape_repr) {
 192             ec->shape_repr = shape_repr;
 193             Inkscape::GC::anchor(shape_repr);
 194             sp_repr_add_listener(shape_repr, &ec_shape_repr_events, ec);
 195         }
 196     }
 197 }
 198
 199 static void sp_flood_context_setup(SPEventContext *ec)
 200 {
 201     SPFloodContext *rc = SP_FLOOD_CONTEXT(ec);
 202
 203     if (((SPEventContextClass *) parent_class)->setup) {
 204         ((SPEventContextClass *) parent_class)->setup(ec);
 205     }
 206
 207     SPItem *item = sp_desktop_selection(ec->desktop)->singleItem();
 208     if (item) {
 209         Inkscape::XML::Node *shape_repr = SP_OBJECT_REPR(item);
 210         if (shape_repr) {
 211             ec->shape_repr = shape_repr;
 212             Inkscape::GC::anchor(shape_repr);
 213             sp_repr_add_listener(shape_repr, &ec_shape_repr_events, ec);
 214         }
 215     }
 216
 217     rc->sel_changed_connection.disconnect();
 218     rc->sel_changed_connection = sp_desktop_selection(ec->desktop)->connectChanged(
 219         sigc::bind(sigc::ptr_fun(&sp_flood_context_selection_changed), (gpointer)rc)
 220     );
 221
 222     rc->_message_context = new Inkscape::MessageContext((ec->desktop)->messageStack());
 223 }
 224
 225 static void
 226 merge_pixel_with_background (unsigned char *orig, unsigned char *bg,
 227            unsigned char *base)
 228 {
 229     for (int i = 0; i < 3; i++) {
 230         base[i] = (255 * (255 - bg[3])) / 255 + (bg[i] * bg[3]) / 255;
 231         base[i] = (base[i] * (255 - orig[3])) / 255 + (orig[i] * orig[3]) / 255;
 232     }
 233     base[3] = 255;
 234 }
 235
 236 inline unsigned char * get_pixel(guchar *px, int x, int y, int width) {
 237     return px + (x + y * width) * 4;
 238 }
 239
 240 enum PaintBucketChannels {
 241     FLOOD_CHANNELS_RGB,
 242     FLOOD_CHANNELS_R,
 243     FLOOD_CHANNELS_G,
 244     FLOOD_CHANNELS_B,
 245     FLOOD_CHANNELS_H,
 246     FLOOD_CHANNELS_S,
 247     FLOOD_CHANNELS_L,
 248     FLOOD_CHANNELS_ALPHA
 249 };
 250
 251 GList * flood_channels_dropdown_items_list() {
 252     GList *glist = NULL;
 253
 254     glist = g_list_append (glist, _("Visible Colors"));
 255     glist = g_list_append (glist, _("Red"));
 256     glist = g_list_append (glist, _("Green"));
 257     glist = g_list_append (glist, _("Blue"));
 258     glist = g_list_append (glist, _("Hue"));
 259     glist = g_list_append (glist, _("Saturation"));
 260     glist = g_list_append (glist, _("Lightness"));
 261     glist = g_list_append (glist, _("Alpha"));
 262
 263     return glist;
 264 }
 265
 266 static bool compare_pixels(unsigned char *check, unsigned char *orig, unsigned char *dtc, int threshold, PaintBucketChannels method) {
 267     int diff = 0;
 268     float hsl_check[3], hsl_orig[3];
 269
 270     if ((method == FLOOD_CHANNELS_H) ||
 271         (method == FLOOD_CHANNELS_S) ||
 272         (method == FLOOD_CHANNELS_L)) {
 273         sp_color_rgb_to_hsl_floatv(hsl_check, check[0] / 255.0, check[1] / 255.0, check[2] / 255.0);
 274         sp_color_rgb_to_hsl_floatv(hsl_orig, orig[0] / 255.0, orig[1] / 255.0, orig[2] / 255.0);
 275     }
 276
 277     switch (method) {
 278         case FLOOD_CHANNELS_ALPHA:
 279             return ((int)abs(check[3] - orig[3]) <= threshold);
 280         case FLOOD_CHANNELS_R:
 281             return ((int)abs(check[0] - orig[0]) <= threshold);
 282         case FLOOD_CHANNELS_G:
 283             return ((int)abs(check[1] - orig[1]) <= threshold);
 284         case FLOOD_CHANNELS_B:
 285             return ((int)abs(check[2] - orig[2]) <= threshold);
 286         case FLOOD_CHANNELS_RGB:
 287             unsigned char merged_orig[4];
 288             unsigned char merged_check[4];
 289
 290             merge_pixel_with_background(orig, dtc, merged_orig);
 291             merge_pixel_with_background(check, dtc, merged_check);
 292
 293             for (int i = 0; i < 3; i++) {
 294               diff += (int)abs(merged_check[i] - merged_orig[i]);
 295             }
 296             return ((diff / 3) <= ((threshold * 3) / 4));
 297
 298         case FLOOD_CHANNELS_H:
 299             return ((int)(fabs(hsl_check[0] - hsl_orig[0]) * 100.0) <= threshold);
 300         case FLOOD_CHANNELS_S:
 301             return ((int)(fabs(hsl_check[1] - hsl_orig[1]) * 100.0) <= threshold);
 302         case FLOOD_CHANNELS_L:
 303             return ((int)(fabs(hsl_check[2] - hsl_orig[2]) * 100.0) <= threshold);
 304     }
 305
 306     return false;
 307 }
 308
 309 static bool try_add_to_queue(std::queue<NR::Point> *fill_queue, guchar *px, guchar *trace_px, unsigned char *orig, unsigned char *dtc, int x, int y, int width, int threshold, PaintBucketChannels method, bool fill_switch) {
 310     unsigned char *t = get_pixel(px, x, y, width);
 311     if (compare_pixels(t, orig, dtc, threshold, method)) {
 312         unsigned char *trace_t = get_pixel(trace_px, x, y, width);
 313         if (trace_t[3] != 255 && trace_t[0] != 255) {
 314             if (fill_switch) {
 315                 fill_queue->push(NR::Point(x, y));
 316                 trace_t[0] = 255;
 317             }
 318         }
 319         return false;
 320     }
 321     return true;
 322 }
 323
 324 static void do_trace(GdkPixbuf *px, SPDesktop *desktop, NR::Matrix transform, bool union_with_selection) {
 325     SPDocument *document = sp_desktop_document(desktop);
 326
 327     Inkscape::Trace::Potrace::PotraceTracingEngine pte;
 328
 329     pte.setTraceType(Inkscape::Trace::Potrace::TRACE_BRIGHTNESS);
 330     pte.setInvert(false);
 331
 332     Glib::RefPtr<Gdk::Pixbuf> pixbuf = Glib::wrap(px, true);
 333
 334     std::vector<Inkscape::Trace::TracingEngineResult> results = pte.trace(pixbuf);
 335
 336     Inkscape::XML::Node *layer_repr = SP_GROUP(desktop->currentLayer())->repr;
 337     Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
 338
 339     long totalNodeCount = 0L;
 340
 341     double offset = prefs_get_double_attribute("tools.paintbucket", "offset", 0.0);
 342
 343     for (unsigned int i=0 ; i<results.size() ; i++) {
 344         Inkscape::Trace::TracingEngineResult result = results[i];
 345         totalNodeCount += result.getNodeCount();
 346
 347         Inkscape::XML::Node *pathRepr = xml_doc->createElement("svg:path");
 348         /* Set style */
 349         sp_desktop_apply_style_tool (desktop, pathRepr, "tools.paintbucket", false);
 350
 351         NArtBpath *bpath = sp_svg_read_path(result.getPathData().c_str());
 352         Path *path = bpath_to_Path(bpath);
 353         g_free(bpath);
 354
 355         if (offset != 0) {
 356
 357             Shape *path_shape = new Shape();
 358
 359             path->ConvertWithBackData(0.03);
 360             path->Fill(path_shape, 0);
 361             delete path;
 362
 363             Shape *expanded_path_shape = new Shape();
 364
 365             expanded_path_shape->ConvertToShape(path_shape, fill_nonZero);
 366             path_shape->MakeOffset(expanded_path_shape, offset * desktop->current_zoom(), join_round, 4);
 367             expanded_path_shape->ConvertToShape(path_shape, fill_positive);
 368
 369             Path *expanded_path = new Path();
 370
 371             expanded_path->Reset();
 372             expanded_path_shape->ConvertToForme(expanded_path);
 373             expanded_path->ConvertEvenLines(1.0);
 374             expanded_path->Simplify(1.0);
 375
 376             delete path_shape;
 377             delete expanded_path_shape;
 378
 379             gchar *str = expanded_path->svg_dump_path();
 380             if (str && *str) {
 381                 pathRepr->setAttribute("d", str);
 382                 g_free(str);
 383             } else {
 384                 desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("<b>Too much inset</b>, the result is empty."));
 385                 Inkscape::GC::release(pathRepr);
 386                 g_free(str);
 387                 return;
 388             }
 389
 390             delete expanded_path;
 391
 392         } else {
 393             gchar *str = path->svg_dump_path();
 394             delete path;
 395             pathRepr->setAttribute("d", str);
 396             g_free(str);
 397         }
 398
 399         layer_repr->addChild(pathRepr, NULL);
 400
 401         SPObject *reprobj = document->getObjectByRepr(pathRepr);
 402         if (reprobj) {
 403             sp_item_write_transform(SP_ITEM(reprobj), pathRepr, transform, NULL);
 404
 405             // premultiply the item transform by the accumulated parent transform in the paste layer
 406             NR::Matrix local = sp_item_i2doc_affine(SP_GROUP(desktop->currentLayer()));
 407             if (!local.test_identity()) {
 408                 gchar const *t_str = pathRepr->attribute("transform");
 409                 NR::Matrix item_t (NR::identity());
 410                 if (t_str)
 411                     sp_svg_transform_read(t_str, &item_t);
 412                 item_t *= local.inverse();
 413                 // (we're dealing with unattached repr, so we write to its attr instead of using sp_item_set_transform)
 414                 gchar *affinestr=sp_svg_transform_write(item_t);
 415                 pathRepr->setAttribute("transform", affinestr);
 416                 g_free(affinestr);
 417             }
 418
 419             Inkscape::Selection *selection = sp_desktop_selection(desktop);
 420
 421             pathRepr->setPosition(-1);
 422
 423             if (union_with_selection) {
 424                 desktop->messageStack()->flashF(Inkscape::WARNING_MESSAGE, _("Area filled, path with <b>%d</b> nodes created and unioned with selection."), sp_nodes_in_path(SP_PATH(reprobj)));
 425                 selection->add(reprobj);
 426                 sp_selected_path_union_skip_undo();
 427             } else {
 428                 desktop->messageStack()->flashF(Inkscape::WARNING_MESSAGE, _("Area filled, path with <b>%d</b> nodes created."), sp_nodes_in_path(SP_PATH(reprobj)));
 429                 selection->set(reprobj);
 430             }
 431
 432         }
 433
 434         Inkscape::GC::release(pathRepr);
 435
 436     }
 437 }
 438
 439 struct bitmap_coords_info {
 440     bool is_left;
 441     int x;
 442     int y;
 443     int y_limit;
 444     int width;
 445     int threshold;
 446     PaintBucketChannels method;
 447     unsigned char *dtc;
 448     bool top_fill;
 449     bool bottom_fill;
 450     NR::Rect bbox;
 451     NR::Rect screen;
 452 };
 453
 454 enum ScanlineCheckResult {
 455     SCANLINE_CHECK_OK,
 456     SCANLINE_CHECK_ABORTED,
 457     SCANLINE_CHECK_BOUNDARY
 458 };
 459
 460 static ScanlineCheckResult perform_bitmap_scanline_check(std::queue<NR::Point> *fill_queue, guchar *px, guchar *trace_px, unsigned char *orig_color, bitmap_coords_info bci) {
 461     bool aborted = false;
 462     bool reached_screen_boundary = false;
 463     bool ok;
 464
 465     bool keep_tracing;
 466     unsigned char *t, *trace_t;
 467
 468     do {
 469         ok = false;
 470         if (bci.is_left) {
 471             keep_tracing = (bci.x >= 0);
 472         } else {
 473             keep_tracing = (bci.x < bci.width);
 474         }
 475
 476         if (keep_tracing) {
 477             t = get_pixel(px, bci.x, bci.y, bci.width);
 478             if (compare_pixels(t, orig_color, bci.dtc, bci.threshold, bci.method)) {
 479                 for (int i = 0; i < 4; i++) { t[i] = 255 - t[i]; }
 480                 trace_t = get_pixel(trace_px, bci.x, bci.y, bci.width);
 481                 trace_t[3] = 255;
 482                 if (bci.y > 0) {
 483                     bci.top_fill = try_add_to_queue(fill_queue, px, trace_px, orig_color, bci.dtc, bci.x, bci.y - 1, bci.width, bci.threshold, bci.method, bci.top_fill);
 484                 }
 485                 if (bci.y < bci.y_limit) {
 486                     bci.bottom_fill = try_add_to_queue(fill_queue, px, trace_px, orig_color, bci.dtc, bci.x, bci.y + 1, bci.width, bci.threshold, bci.method, bci.bottom_fill);
 487                 }
 488                 if (bci.is_left) {
 489                     bci.x--;
 490                 } else {
 491                     bci.x++;
 492                 }
 493                 ok = true;
 494             }
 495         } else {
 496             if (bci.bbox.min()[NR::X] > bci.screen.min()[NR::X]) {
 497                 aborted = true; break;
 498             } else {
 499                 reached_screen_boundary = true;
 500             }
 501         }
 502     } while (ok);
 503
 504     if (aborted) { return SCANLINE_CHECK_ABORTED; }
 505     if (reached_screen_boundary) { return SCANLINE_CHECK_BOUNDARY; }
 506     return SCANLINE_CHECK_OK;
 507 }
 508
 509 static void sp_flood_do_flood_fill(SPEventContext *event_context, GdkEvent *event, bool union_with_selection, bool use_rubberband_points) {
 510     SPDesktop *desktop = event_context->desktop;
 511     SPDocument *document = sp_desktop_document(desktop);
 512
 513     /* Create new arena */
 514     NRArena *arena = NRArena::create();
 515     unsigned dkey = sp_item_display_key_new(1);
 516
 517     sp_document_ensure_up_to_date (document);
 518
 519     SPItem *document_root = SP_ITEM(SP_DOCUMENT_ROOT(document));
 520     NR::Maybe<NR::Rect> bbox = document_root->getBounds(NR::identity());
 521
 522     if (!bbox) {
 523         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("<b>Area is not bounded</b>, cannot fill."));
 524         return;
 525     }
 526
 527     double zoom_scale = desktop->current_zoom();
 528     double padding = 1.6;
 529
 530     NR::Rect screen = desktop->get_display_area();
 531
 532     int width = (int)ceil(screen.extent(NR::X) * zoom_scale * padding);
 533     int height = (int)ceil(screen.extent(NR::Y) * zoom_scale * padding);
 534
 535     NR::Point origin(screen.min()[NR::X],
 536                      sp_document_height(document) - screen.extent(NR::Y) - screen.min()[NR::Y]);
 537
 538     origin[NR::X] = origin[NR::X] + (screen.extent(NR::X) * ((1 - padding) / 2));
 539     origin[NR::Y] = origin[NR::Y] + (screen.extent(NR::Y) * ((1 - padding) / 2));
 540
 541     NR::scale scale(zoom_scale, zoom_scale);
 542     NR::Matrix affine = scale * NR::translate(-origin * scale);
 543
 544     /* Create ArenaItems and set transform */
 545     NRArenaItem *root = sp_item_invoke_show(SP_ITEM(sp_document_root(document)), arena, dkey, SP_ITEM_SHOW_DISPLAY);
 546     nr_arena_item_set_transform(NR_ARENA_ITEM(root), affine);
 547
 548     NRGC gc(NULL);
 549     nr_matrix_set_identity(&gc.transform);
 550
 551     NRRectL final_bbox;
 552     final_bbox.x0 = 0;
 553     final_bbox.y0 = 0;//row;
 554     final_bbox.x1 = width;
 555     final_bbox.y1 = height;//row + num_rows;
 556
 557     nr_arena_item_invoke_update(root, &final_bbox, &gc, NR_ARENA_ITEM_STATE_ALL, NR_ARENA_ITEM_STATE_NONE);
 558
 559     guchar *px = g_new(guchar, 4 * width * height);
 560     //memset(px, 0x00, 4 * width * height);
 561
 562     NRPixBlock B;
 563     nr_pixblock_setup_extern( &B, NR_PIXBLOCK_MODE_R8G8B8A8N,
 564                               final_bbox.x0, final_bbox.y0, final_bbox.x1, final_bbox.y1,
 565                               px, 4 * width, FALSE, FALSE );
 566
 567     SPNamedView *nv = sp_desktop_namedview(desktop);
 568     unsigned long bgcolor = nv->pagecolor;
 569
 570     unsigned char dtc[4];
 571     dtc[0] = NR_RGBA32_R(bgcolor);
 572     dtc[1] = NR_RGBA32_G(bgcolor);
 573     dtc[2] = NR_RGBA32_B(bgcolor);
 574     dtc[3] = NR_RGBA32_A(bgcolor);
 575
 576     for (int fy = 0; fy < height; fy++) {
 577         guchar *p = NR_PIXBLOCK_PX(&B) + fy * B.rs;
 578         for (int fx = 0; fx < width; fx++) {
 579             for (int i = 0; i < 4; i++) {
 580                 *p++ = dtc[i];
 581             }
 582           }
 583       }
 584
 585     nr_arena_item_invoke_render(NULL, root, &final_bbox, &B, NR_ARENA_ITEM_RENDER_NO_CACHE );
 586     nr_pixblock_release(&B);
 587
 588     // Hide items
 589     sp_item_invoke_hide(SP_ITEM(sp_document_root(document)), dkey);
 590
 591     nr_arena_item_unref(root);
 592     nr_object_unref((NRObject *) arena);
 593
 594     guchar *trace_px = g_new(guchar, 4 * width * height);
 595     memset(trace_px, 0x00, 4 * width * height);
 596
 597     std::queue<NR::Point> fill_queue;
 598
 599
 600     std::vector<NR::Point> points;
 601
 602     if (use_rubberband_points) {
 603         Inkscape::Rubberband::Rubberband *r = Inkscape::Rubberband::get();
 604         points = r->getPoints();
 605     } else {
 606         points.push_back(NR::Point(event->button.x, event->button.y));
 607     }
 608
 609     for (unsigned int i = 0; i < points.size(); i++) {
 610         NR::Point pw = NR::Point(points[i][NR::X] / zoom_scale, sp_document_height(document) + (points[i][NR::Y] / zoom_scale)) * affine;
 611
 612         pw[NR::X] = (int)MIN(width - 1, MAX(0, pw[NR::X]));
 613         pw[NR::Y] = (int)MIN(height - 1, MAX(0, pw[NR::Y]));
 614
 615         fill_queue.push(pw);
 616     }
 617
 618     NR::Point first_point = NR::Point(points[0][NR::X] / zoom_scale, sp_document_height(document) + (points[0][NR::Y] / zoom_scale)) * affine;
 619
 620     unsigned char *orig_px  = get_pixel(px, (int)first_point[NR::X], (int)first_point[NR::Y], width);
 621     unsigned char orig_color[4];
 622     for (int i = 0; i < 4; i++) { orig_color[i] = orig_px[i]; }
 623
 624     bool aborted = false;
 625     int y_limit = height - 1;
 626
 627     unsigned char merged_orig[4];
 628
 629     merge_pixel_with_background(orig_color, dtc, merged_orig);
 630
 631     PaintBucketChannels method = (PaintBucketChannels)prefs_get_int_attribute("tools.paintbucket", "channels", 0);
 632     int threshold = prefs_get_int_attribute_limited("tools.paintbucket", "threshold", 1, 0, 100);
 633
 634     switch(method) {
 635         case FLOOD_CHANNELS_ALPHA:
 636         case FLOOD_CHANNELS_RGB:
 637         case FLOOD_CHANNELS_R:
 638         case FLOOD_CHANNELS_G:
 639         case FLOOD_CHANNELS_B:
 640             threshold = (255 * threshold) / 100;
 641             break;
 642         case FLOOD_CHANNELS_H:
 643         case FLOOD_CHANNELS_S:
 644         case FLOOD_CHANNELS_L:
 645             break;
 646       }
 647
 648     bool reached_screen_boundary = false;
 649
 650     bitmap_coords_info bci;
 651
 652     bci.y_limit = y_limit;
 653     bci.width = width;
 654     bci.threshold = threshold;
 655     bci.method = method;
 656     bci.bbox = *bbox;
 657     bci.screen = screen;
 658     bci.dtc = dtc;
 659
 660     while (!fill_queue.empty() && !aborted) {
 661         NR::Point cp = fill_queue.front();
 662         fill_queue.pop();
 663         unsigned char *s = get_pixel(px, (int)cp[NR::X], (int)cp[NR::Y], width);
 664
 665         // same color at this point
 666         if (compare_pixels(s, orig_color, dtc, threshold, method)) {
 667             int x = (int)cp[NR::X];
 668             int y = (int)cp[NR::Y];
 669
 670             bool top_fill = true;
 671             bool bottom_fill = true;
 672
 673             if (y > 0) {
 674                 top_fill = try_add_to_queue(&fill_queue, px, trace_px, orig_color, dtc, x, y - 1, width, threshold, method, top_fill);
 675             } else {
 676                 if (bbox->min()[NR::Y] > screen.min()[NR::Y]) {
 677                     aborted = true; break;
 678                 } else {
 679                     reached_screen_boundary = true;
 680                 }
 681             }
 682             if (y < y_limit) {
 683                 bottom_fill = try_add_to_queue(&fill_queue, px, trace_px, orig_color, dtc, x, y + 1, width, threshold, method, bottom_fill);
 684               } else {
 685                   if (bbox->max()[NR::Y] < screen.max()[NR::Y]) {
 686                       aborted = true; break;
 687                   } else {
 688                       reached_screen_boundary = true;
 689                   }
 690             }
 691
 692             bci.is_left = true;
 693             bci.x = x;
 694             bci.y = y;
 695             bci.top_fill = top_fill;
 696             bci.bottom_fill = bottom_fill;
 697
 698             ScanlineCheckResult result = perform_bitmap_scanline_check(&fill_queue, px, trace_px, orig_color, bci);
 699
 700             switch (result) {
 701                 case SCANLINE_CHECK_ABORTED:
 702                     aborted = true;
 703                     break;
 704                 case SCANLINE_CHECK_BOUNDARY:
 705                     reached_screen_boundary = true;
 706                     break;
 707                 default:
 708                     break;
 709             }
 710
 711             bci.is_left = false;
 712             bci.x = x + 1;
 713             bci.y = y;
 714             bci.top_fill = top_fill;
 715             bci.bottom_fill = bottom_fill;
 716
 717             result = perform_bitmap_scanline_check(&fill_queue, px, trace_px, orig_color, bci);
 718
 719             switch (result) {
 720                 case SCANLINE_CHECK_ABORTED:
 721                     aborted = true;
 722                     break;
 723                 case SCANLINE_CHECK_BOUNDARY:
 724                     reached_screen_boundary = true;
 725                     break;
 726                 default:
 727                     break;
 728             }
 729         }
 730     }
 731
 732     g_free(px);
 733
 734     if (aborted) {
 735         g_free(trace_px);
 736         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("<b>Area is not bounded</b>, cannot fill."));
 737         return;
 738     }
 739
 740     if (reached_screen_boundary) {
 741         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("<b>Only the visible part of the bounded area was filled.</b> If you want to fill all of the area, undo, zoom out, and fill again."));
 742     }
 743
 744     GdkPixbuf* pixbuf = gdk_pixbuf_new_from_data(trace_px,
 745                                       GDK_COLORSPACE_RGB,
 746                                       TRUE,
 747                                       8, width, height, width * 4,
 748                                       (GdkPixbufDestroyNotify)g_free,
 749                                       NULL);
 750
 751     NR::Matrix inverted_affine = NR::Matrix(affine).inverse();
 752
 753     do_trace(pixbuf, desktop, inverted_affine, union_with_selection);
 754
 755     g_free(trace_px);
 756
 757     sp_document_done(document, SP_VERB_CONTEXT_PAINTBUCKET, _("Fill bounded area"));
 758 }
 759
 760 static gint sp_flood_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event)
 761 {
 762     gint ret = FALSE;
 763
 764     SPDesktop *desktop = event_context->desktop;
 765
 766     switch (event->type) {
 767     case GDK_BUTTON_PRESS:
 768         if (event->button.state & GDK_CONTROL_MASK) {
 769             NR::Point const button_w(event->button.x,
 770                                     event->button.y);
 771
 772             SPItem *item = sp_event_context_find_item (desktop, button_w, TRUE, TRUE);
 773
 774             Inkscape::XML::Node *pathRepr = SP_OBJECT_REPR(item);
 775             /* Set style */
 776             sp_desktop_apply_style_tool (desktop, pathRepr, "tools.paintbucket", false);
 777             sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_PAINTBUCKET, _("Set style on object"));
 778             ret = TRUE;
 779         }
 780         break;
 781     default:
 782         break;
 783     }
 784
 785     if (((SPEventContextClass *) parent_class)->item_handler) {
 786         ret = ((SPEventContextClass *) parent_class)->item_handler(event_context, item, event);
 787     }
 788
 789     return ret;
 790 }
 791
 792 static gint sp_flood_context_root_handler(SPEventContext *event_context, GdkEvent *event)
 793 {
 794     gint ret = FALSE;
 795     SPDesktop *desktop = event_context->desktop;
 796
 797     switch (event->type) {
 798     case GDK_BUTTON_PRESS:
 799         if ( event->button.button == 1 ) {
 800             if (!(event->button.state & GDK_CONTROL_MASK)) {
 801                 if (event->button.state & GDK_MOD1_MASK) {
 802                     NR::Point const button_pt(event->button.x, event->button.y);
 803                     NR::Point const p(desktop->w2d(button_pt));
 804                     Inkscape::Rubberband::get()->setMode(RUBBERBAND_MODE_TOUCHPATH);
 805                     Inkscape::Rubberband::get()->start(desktop, p);
 806                 } else {
 807                     // set "busy" cursor
 808                     desktop->setWaitingCursor();
 809
 810                     if (SP_IS_EVENT_CONTEXT(event_context)) {
 811                         // Since setWaitingCursor runs main loop iterations, we may have already left this tool!
 812                         // So check if the tool is valid before doing anything
 813
 814                         sp_flood_do_flood_fill(event_context, event, event->button.state & GDK_SHIFT_MASK, false);
 815
 816                         // restore cursor when done; note that it may already be different if e.g. user
 817                         // switched to another tool during interruptible tracing or drawing, in which case do nothing
 818                         desktop->clearWaitingCursor();
 819
 820                         ret = TRUE;
 821                     }
 822                 }
 823             }
 824         }
 825     case GDK_MOTION_NOTIFY:
 826         if (event->motion.state & GDK_BUTTON1_MASK) {
 827             NR::Point const motion_pt(event->motion.x, event->motion.y);
 828             NR::Point const p(desktop->w2d(motion_pt));
 829             if (Inkscape::Rubberband::get()->is_started()) {
 830                 Inkscape::Rubberband::get()->move(p);
 831                 event_context->defaultMessageContext()->set(Inkscape::NORMAL_MESSAGE, _("<b>Draw over</b> areas to add to fill"));
 832                 gobble_motion_events(GDK_BUTTON1_MASK);
 833             }
 834         }
 835         break;
 836
 837     case GDK_BUTTON_RELEASE:
 838         if ( event->button.button == 1 ) {
 839             Inkscape::Rubberband::Rubberband *r = Inkscape::Rubberband::get();
 840             if (r->is_started()) {
 841                 // set "busy" cursor
 842                 desktop->setWaitingCursor();
 843
 844                 if (SP_IS_EVENT_CONTEXT(event_context)) {
 845                     // Since setWaitingCursor runs main loop iterations, we may have already left this tool!
 846                     // So check if the tool is valid before doing anything
 847
 848                     sp_flood_do_flood_fill(event_context, event, event->button.state & GDK_SHIFT_MASK, true);
 849
 850                     // restore cursor when done; note that it may already be different if e.g. user
 851                     // switched to another tool during interruptible tracing or drawing, in which case do nothing
 852                     desktop->clearWaitingCursor();
 853
 854                     ret = TRUE;
 855                 }
 856                 r->stop();
 857                 event_context->defaultMessageContext()->clear();
 858             }
 859         }
 860         break;
 861     case GDK_KEY_PRESS:
 862         switch (get_group0_keyval (&event->key)) {
 863         case GDK_Up:
 864         case GDK_Down:
 865         case GDK_KP_Up:
 866         case GDK_KP_Down:
 867             // prevent the zoom field from activation
 868             if (!MOD__CTRL_ONLY)
 869                 ret = TRUE;
 870             break;
 871         default:
 872             break;
 873         }
 874         break;
 875     default:
 876         break;
 877     }
 878
 879     if (!ret) {
 880         if (((SPEventContextClass *) parent_class)->root_handler) {
 881             ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
 882         }
 883     }
 884
 885     return ret;
 886 }
 887
 888
 889 static void sp_flood_finish(SPFloodContext *rc)
 890 {
 891     rc->_message_context->clear();
 892
 893     if ( rc->item != NULL ) {
 894         SPDesktop * desktop;
 895
 896         desktop = SP_EVENT_CONTEXT_DESKTOP(rc);
 897
 898         SP_OBJECT(rc->item)->updateRepr();
 899
 900         sp_canvas_end_forced_full_redraws(desktop->canvas);
 901
 902         sp_desktop_selection(desktop)->set(rc->item);
 903         sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_PAINTBUCKET,
 904                         _("Fill bounded area"));
 905
 906         rc->item = NULL;
 907     }
 908 }
 909
 910 void flood_channels_set_channels( gint channels )
 911 {
 912     prefs_set_int_attribute("tools.paintbucket", "channels", channels);
 913 }
 914
 915 /*
 916   Local Variables:
 917   mode:c++
 918   c-file-style:"stroustrup"
 919   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 920   indent-tabs-mode:nil
 921   fill-column:99
 922   End:
 923 */
 924 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :