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 #include <deque>
  23
  24 #include "macros.h"
  25 #include "display/sp-canvas.h"
  26 #include "document.h"
  27 #include "sp-namedview.h"
  28 #include "sp-object.h"
  29 #include "sp-rect.h"
  30 #include "selection.h"
  31 #include "desktop-handles.h"
  32 #include "desktop.h"
  33 #include "desktop-style.h"
  34 #include "message-stack.h"
  35 #include "message-context.h"
  36 #include "pixmaps/cursor-paintbucket.xpm"
  37 #include "flood-context.h"
  38 #include "sp-metrics.h"
  39 #include <glibmm/i18n.h>
  40 #include "object-edit.h"
  41 #include "xml/repr.h"
  42 #include "xml/node-event-vector.h"
  43 #include "prefs-utils.h"
  44 #include "context-fns.h"
  45 #include "rubberband.h"
  46
  47 #include "display/nr-arena-item.h"
  48 #include "display/nr-arena.h"
  49 #include "display/nr-arena-image.h"
  50 #include "display/canvas-arena.h"
  51 #include "libnr/nr-pixops.h"
  52 #include "libnr/nr-matrix-translate-ops.h"
  53 #include "libnr/nr-scale-ops.h"
  54 #include "libnr/nr-scale-translate-ops.h"
  55 #include "libnr/nr-translate-matrix-ops.h"
  56 #include "libnr/nr-translate-scale-ops.h"
  57 #include "libnr/nr-matrix-ops.h"
  58 #include "sp-item.h"
  59 #include "sp-root.h"
  60 #include "sp-defs.h"
  61 #include "sp-path.h"
  62 #include "splivarot.h"
  63 #include "livarot/Path.h"
  64 #include "livarot/Shape.h"
  65 #include "libnr/n-art-bpath.h"
  66 #include "svg/svg.h"
  67 #include "color.h"
  68
  69 #include "trace/trace.h"
  70 #include "trace/potrace/inkscape-potrace.h"
  71
  72 static void sp_flood_context_class_init(SPFloodContextClass *klass);
  73 static void sp_flood_context_init(SPFloodContext *flood_context);
  74 static void sp_flood_context_dispose(GObject *object);
  75
  76 static void sp_flood_context_setup(SPEventContext *ec);
  77
  78 static gint sp_flood_context_root_handler(SPEventContext *event_context, GdkEvent *event);
  79 static gint sp_flood_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event);
  80
  81 static void sp_flood_finish(SPFloodContext *rc);
  82
  83 static SPEventContextClass *parent_class;
  84
  85
  86 GtkType sp_flood_context_get_type()
  87 {
  88     static GType type = 0;
  89     if (!type) {
  90         GTypeInfo info = {
  91             sizeof(SPFloodContextClass),
  92             NULL, NULL,
  93             (GClassInitFunc) sp_flood_context_class_init,
  94             NULL, NULL,
  95             sizeof(SPFloodContext),
  96             4,
  97             (GInstanceInitFunc) sp_flood_context_init,
  98             NULL,    /* value_table */
  99         };
 100         type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPFloodContext", &info, (GTypeFlags) 0);
 101     }
 102     return type;
 103 }
 104
 105 static void sp_flood_context_class_init(SPFloodContextClass *klass)
 106 {
 107     GObjectClass *object_class = (GObjectClass *) klass;
 108     SPEventContextClass *event_context_class = (SPEventContextClass *) klass;
 109
 110     parent_class = (SPEventContextClass *) g_type_class_peek_parent(klass);
 111
 112     object_class->dispose = sp_flood_context_dispose;
 113
 114     event_context_class->setup = sp_flood_context_setup;
 115     event_context_class->root_handler  = sp_flood_context_root_handler;
 116     event_context_class->item_handler  = sp_flood_context_item_handler;
 117 }
 118
 119 static void sp_flood_context_init(SPFloodContext *flood_context)
 120 {
 121     SPEventContext *event_context = SP_EVENT_CONTEXT(flood_context);
 122
 123     event_context->cursor_shape = cursor_paintbucket_xpm;
 124     event_context->hot_x = 11;
 125     event_context->hot_y = 30;
 126     event_context->xp = 0;
 127     event_context->yp = 0;
 128     event_context->tolerance = 4;
 129     event_context->within_tolerance = false;
 130     event_context->item_to_select = NULL;
 131
 132     event_context->shape_repr = NULL;
 133     event_context->shape_knot_holder = NULL;
 134
 135     flood_context->item = NULL;
 136
 137     new (&flood_context->sel_changed_connection) sigc::connection();
 138 }
 139
 140 static void sp_flood_context_dispose(GObject *object)
 141 {
 142     SPFloodContext *rc = SP_FLOOD_CONTEXT(object);
 143     SPEventContext *ec = SP_EVENT_CONTEXT(object);
 144
 145     rc->sel_changed_connection.disconnect();
 146     rc->sel_changed_connection.~connection();
 147
 148     /* fixme: This is necessary because we do not grab */
 149     if (rc->item) {
 150         sp_flood_finish(rc);
 151     }
 152
 153     if (ec->shape_repr) { // remove old listener
 154         sp_repr_remove_listener_by_data(ec->shape_repr, ec);
 155         Inkscape::GC::release(ec->shape_repr);
 156         ec->shape_repr = 0;
 157     }
 158
 159     if (rc->_message_context) {
 160         delete rc->_message_context;
 161     }
 162
 163     G_OBJECT_CLASS(parent_class)->dispose(object);
 164 }
 165
 166 static Inkscape::XML::NodeEventVector ec_shape_repr_events = {
 167     NULL, /* child_added */
 168     NULL, /* child_removed */
 169     ec_shape_event_attr_changed,
 170     NULL, /* content_changed */
 171     NULL  /* order_changed */
 172 };
 173
 174 /**
 175 \brief  Callback that processes the "changed" signal on the selection;
 176 destroys old and creates new knotholder
 177 */
 178 void sp_flood_context_selection_changed(Inkscape::Selection *selection, gpointer data)
 179 {
 180     SPFloodContext *rc = SP_FLOOD_CONTEXT(data);
 181     SPEventContext *ec = SP_EVENT_CONTEXT(rc);
 182
 183     if (ec->shape_repr) { // remove old listener
 184         sp_repr_remove_listener_by_data(ec->shape_repr, ec);
 185         Inkscape::GC::release(ec->shape_repr);
 186         ec->shape_repr = 0;
 187     }
 188
 189     SPItem *item = selection->singleItem();
 190     if (item) {
 191         Inkscape::XML::Node *shape_repr = SP_OBJECT_REPR(item);
 192         if (shape_repr) {
 193             ec->shape_repr = shape_repr;
 194             Inkscape::GC::anchor(shape_repr);
 195             sp_repr_add_listener(shape_repr, &ec_shape_repr_events, ec);
 196         }
 197     }
 198 }
 199
 200 static void sp_flood_context_setup(SPEventContext *ec)
 201 {
 202     SPFloodContext *rc = SP_FLOOD_CONTEXT(ec);
 203
 204     if (((SPEventContextClass *) parent_class)->setup) {
 205         ((SPEventContextClass *) parent_class)->setup(ec);
 206     }
 207
 208     SPItem *item = sp_desktop_selection(ec->desktop)->singleItem();
 209     if (item) {
 210         Inkscape::XML::Node *shape_repr = SP_OBJECT_REPR(item);
 211         if (shape_repr) {
 212             ec->shape_repr = shape_repr;
 213             Inkscape::GC::anchor(shape_repr);
 214             sp_repr_add_listener(shape_repr, &ec_shape_repr_events, ec);
 215         }
 216     }
 217
 218     rc->sel_changed_connection.disconnect();
 219     rc->sel_changed_connection = sp_desktop_selection(ec->desktop)->connectChanged(
 220         sigc::bind(sigc::ptr_fun(&sp_flood_context_selection_changed), (gpointer)rc)
 221     );
 222
 223     rc->_message_context = new Inkscape::MessageContext((ec->desktop)->messageStack());
 224 }
 225
 226 static void
 227 merge_pixel_with_background (unsigned char *orig, unsigned char *bg,
 228            unsigned char *base)
 229 {
 230     for (int i = 0; i < 3; i++) {
 231         base[i] = (255 * (255 - bg[3])) / 255 + (bg[i] * bg[3]) / 255;
 232         base[i] = (base[i] * (255 - orig[3])) / 255 + (orig[i] * orig[3]) / 255;
 233     }
 234     base[3] = 255;
 235 }
 236
 237 inline unsigned char * get_pixel(guchar *px, int x, int y, int width) {
 238     return px + (x + y * width) * 4;
 239 }
 240
 241 GList * flood_channels_dropdown_items_list() {
 242     GList *glist = NULL;
 243
 244     glist = g_list_append (glist, _("Visible Colors"));
 245     glist = g_list_append (glist, _("Red"));
 246     glist = g_list_append (glist, _("Green"));
 247     glist = g_list_append (glist, _("Blue"));
 248     glist = g_list_append (glist, _("Hue"));
 249     glist = g_list_append (glist, _("Saturation"));
 250     glist = g_list_append (glist, _("Lightness"));
 251     glist = g_list_append (glist, _("Alpha"));
 252
 253     return glist;
 254 }
 255
 256 static bool compare_pixels(unsigned char *check, unsigned char *orig, unsigned char *dtc, int threshold, PaintBucketChannels method) {
 257     int diff = 0;
 258     float hsl_check[3], hsl_orig[3];
 259
 260     if ((method == FLOOD_CHANNELS_H) ||
 261         (method == FLOOD_CHANNELS_S) ||
 262         (method == FLOOD_CHANNELS_L)) {
 263         sp_color_rgb_to_hsl_floatv(hsl_check, check[0] / 255.0, check[1] / 255.0, check[2] / 255.0);
 264         sp_color_rgb_to_hsl_floatv(hsl_orig, orig[0] / 255.0, orig[1] / 255.0, orig[2] / 255.0);
 265     }
 266
 267     switch (method) {
 268         case FLOOD_CHANNELS_ALPHA:
 269             return ((int)abs(check[3] - orig[3]) <= threshold);
 270         case FLOOD_CHANNELS_R:
 271             return ((int)abs(check[0] - orig[0]) <= threshold);
 272         case FLOOD_CHANNELS_G:
 273             return ((int)abs(check[1] - orig[1]) <= threshold);
 274         case FLOOD_CHANNELS_B:
 275             return ((int)abs(check[2] - orig[2]) <= threshold);
 276         case FLOOD_CHANNELS_RGB:
 277             unsigned char merged_orig[4];
 278             unsigned char merged_check[4];
 279
 280             merge_pixel_with_background(orig, dtc, merged_orig);
 281             merge_pixel_with_background(check, dtc, merged_check);
 282
 283             for (int i = 0; i < 3; i++) {
 284               diff += (int)abs(merged_check[i] - merged_orig[i]);
 285             }
 286             return ((diff / 3) <= ((threshold * 3) / 4));
 287
 288         case FLOOD_CHANNELS_H:
 289             return ((int)(fabs(hsl_check[0] - hsl_orig[0]) * 100.0) <= threshold);
 290         case FLOOD_CHANNELS_S:
 291             return ((int)(fabs(hsl_check[1] - hsl_orig[1]) * 100.0) <= threshold);
 292         case FLOOD_CHANNELS_L:
 293             return ((int)(fabs(hsl_check[2] - hsl_orig[2]) * 100.0) <= threshold);
 294     }
 295
 296     return false;
 297 }
 298
 299 static bool try_add_to_queue(std::deque<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) {
 300     unsigned char *t = get_pixel(px, x, y, width);
 301     if (compare_pixels(t, orig, dtc, threshold, method)) {
 302         unsigned char *trace_t = get_pixel(trace_px, x, y, width);
 303         if (trace_t[3] != 255 && trace_t[0] != 255) {
 304             if (fill_switch) {
 305                 fill_queue->push_back(NR::Point(x, y));
 306                 trace_t[0] = 255;
 307             }
 308         }
 309         return false;
 310     }
 311     return true;
 312 }
 313
 314 static void do_trace(GdkPixbuf *px, SPDesktop *desktop, NR::Matrix transform, bool union_with_selection) {
 315     SPDocument *document = sp_desktop_document(desktop);
 316
 317     Inkscape::Trace::Potrace::PotraceTracingEngine pte;
 318
 319     pte.setTraceType(Inkscape::Trace::Potrace::TRACE_BRIGHTNESS);
 320     pte.setInvert(false);
 321
 322     Glib::RefPtr<Gdk::Pixbuf> pixbuf = Glib::wrap(px, true);
 323
 324     std::vector<Inkscape::Trace::TracingEngineResult> results = pte.trace(pixbuf);
 325
 326     Inkscape::XML::Node *layer_repr = SP_GROUP(desktop->currentLayer())->repr;
 327     Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
 328
 329     long totalNodeCount = 0L;
 330
 331     double offset = prefs_get_double_attribute("tools.paintbucket", "offset", 0.0);
 332
 333     for (unsigned int i=0 ; i<results.size() ; i++) {
 334         Inkscape::Trace::TracingEngineResult result = results[i];
 335         totalNodeCount += result.getNodeCount();
 336
 337         Inkscape::XML::Node *pathRepr = xml_doc->createElement("svg:path");
 338         /* Set style */
 339         sp_desktop_apply_style_tool (desktop, pathRepr, "tools.paintbucket", false);
 340
 341         NArtBpath *bpath = sp_svg_read_path(result.getPathData().c_str());
 342         Path *path = bpath_to_Path(bpath);
 343         g_free(bpath);
 344
 345         if (offset != 0) {
 346
 347             Shape *path_shape = new Shape();
 348
 349             path->ConvertWithBackData(0.03);
 350             path->Fill(path_shape, 0);
 351             delete path;
 352
 353             Shape *expanded_path_shape = new Shape();
 354
 355             expanded_path_shape->ConvertToShape(path_shape, fill_nonZero);
 356             path_shape->MakeOffset(expanded_path_shape, offset * desktop->current_zoom(), join_round, 4);
 357             expanded_path_shape->ConvertToShape(path_shape, fill_positive);
 358
 359             Path *expanded_path = new Path();
 360
 361             expanded_path->Reset();
 362             expanded_path_shape->ConvertToForme(expanded_path);
 363             expanded_path->ConvertEvenLines(1.0);
 364             expanded_path->Simplify(1.0);
 365
 366             delete path_shape;
 367             delete expanded_path_shape;
 368
 369             gchar *str = expanded_path->svg_dump_path();
 370             if (str && *str) {
 371                 pathRepr->setAttribute("d", str);
 372                 g_free(str);
 373             } else {
 374                 desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("<b>Too much inset</b>, the result is empty."));
 375                 Inkscape::GC::release(pathRepr);
 376                 g_free(str);
 377                 return;
 378             }
 379
 380             delete expanded_path;
 381
 382         } else {
 383             gchar *str = path->svg_dump_path();
 384             delete path;
 385             pathRepr->setAttribute("d", str);
 386             g_free(str);
 387         }
 388
 389         layer_repr->addChild(pathRepr, NULL);
 390
 391         SPObject *reprobj = document->getObjectByRepr(pathRepr);
 392         if (reprobj) {
 393             sp_item_write_transform(SP_ITEM(reprobj), pathRepr, transform, NULL);
 394
 395             // premultiply the item transform by the accumulated parent transform in the paste layer
 396             NR::Matrix local = sp_item_i2doc_affine(SP_GROUP(desktop->currentLayer()));
 397             if (!local.test_identity()) {
 398                 gchar const *t_str = pathRepr->attribute("transform");
 399                 NR::Matrix item_t (NR::identity());
 400                 if (t_str)
 401                     sp_svg_transform_read(t_str, &item_t);
 402                 item_t *= local.inverse();
 403                 // (we're dealing with unattached repr, so we write to its attr instead of using sp_item_set_transform)
 404                 gchar *affinestr=sp_svg_transform_write(item_t);
 405                 pathRepr->setAttribute("transform", affinestr);
 406                 g_free(affinestr);
 407             }
 408
 409             Inkscape::Selection *selection = sp_desktop_selection(desktop);
 410
 411             pathRepr->setPosition(-1);
 412
 413             if (union_with_selection) {
 414                 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)));
 415                 selection->add(reprobj);
 416                 sp_selected_path_union_skip_undo();
 417             } else {
 418                 desktop->messageStack()->flashF(Inkscape::WARNING_MESSAGE, _("Area filled, path with <b>%d</b> nodes created."), sp_nodes_in_path(SP_PATH(reprobj)));
 419                 selection->set(reprobj);
 420             }
 421
 422         }
 423
 424         Inkscape::GC::release(pathRepr);
 425
 426     }
 427 }
 428
 429 struct bitmap_coords_info {
 430     bool is_left;
 431     int x;
 432     int y;
 433     int y_limit;
 434     int width;
 435     int threshold;
 436     PaintBucketChannels method;
 437     unsigned char *dtc;
 438     bool top_fill;
 439     bool bottom_fill;
 440     NR::Rect bbox;
 441     NR::Rect screen;
 442 };
 443
 444 enum ScanlineCheckResult {
 445     SCANLINE_CHECK_OK,
 446     SCANLINE_CHECK_ABORTED,
 447     SCANLINE_CHECK_BOUNDARY
 448 };
 449
 450 static ScanlineCheckResult perform_bitmap_scanline_check(std::deque<NR::Point> *fill_queue, guchar *px, guchar *trace_px, unsigned char *orig_color, bitmap_coords_info bci) {
 451     bool aborted = false;
 452     bool reached_screen_boundary = false;
 453     bool ok;
 454
 455     bool keep_tracing;
 456     unsigned char *t, *trace_t;
 457
 458     do {
 459         ok = false;
 460         if (bci.is_left) {
 461             keep_tracing = (bci.x >= 0);
 462         } else {
 463             keep_tracing = (bci.x < bci.width);
 464         }
 465
 466         if (keep_tracing) {
 467             t = get_pixel(px, bci.x, bci.y, bci.width);
 468             if (compare_pixels(t, orig_color, bci.dtc, bci.threshold, bci.method)) {
 469                 for (int i = 0; i < 4; i++) { t[i] = 255 - t[i]; }
 470                 trace_t = get_pixel(trace_px, bci.x, bci.y, bci.width);
 471                 trace_t[3] = 255;
 472                 if (bci.y > 0) {
 473                     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);
 474                 }
 475                 if (bci.y < bci.y_limit) {
 476                     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);
 477                 }
 478                 if (bci.is_left) {
 479                     bci.x--;
 480                 } else {
 481                     bci.x++;
 482                 }
 483                 ok = true;
 484             }
 485         } else {
 486             if (bci.bbox.min()[NR::X] > bci.screen.min()[NR::X]) {
 487                 aborted = true; break;
 488             } else {
 489                 reached_screen_boundary = true;
 490             }
 491         }
 492     } while (ok);
 493
 494     if (aborted) { return SCANLINE_CHECK_ABORTED; }
 495     if (reached_screen_boundary) { return SCANLINE_CHECK_BOUNDARY; }
 496     return SCANLINE_CHECK_OK;
 497 }
 498
 499 static void sp_flood_do_flood_fill(SPEventContext *event_context, GdkEvent *event, bool union_with_selection, bool is_point_fill, bool is_touch_fill) {
 500     SPDesktop *desktop = event_context->desktop;
 501     SPDocument *document = sp_desktop_document(desktop);
 502
 503     /* Create new arena */
 504     NRArena *arena = NRArena::create();
 505     unsigned dkey = sp_item_display_key_new(1);
 506
 507     sp_document_ensure_up_to_date (document);
 508
 509     SPItem *document_root = SP_ITEM(SP_DOCUMENT_ROOT(document));
 510     NR::Maybe<NR::Rect> bbox = document_root->getBounds(NR::identity());
 511
 512     if (!bbox) {
 513         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("<b>Area is not bounded</b>, cannot fill."));
 514         return;
 515     }
 516
 517     double zoom_scale = desktop->current_zoom();
 518     double padding = 1.6;
 519
 520     NR::Rect screen = desktop->get_display_area();
 521
 522     int width = (int)ceil(screen.extent(NR::X) * zoom_scale * padding);
 523     int height = (int)ceil(screen.extent(NR::Y) * zoom_scale * padding);
 524
 525     NR::Point origin(screen.min()[NR::X],
 526                      sp_document_height(document) - screen.extent(NR::Y) - screen.min()[NR::Y]);
 527
 528     origin[NR::X] = origin[NR::X] + (screen.extent(NR::X) * ((1 - padding) / 2));
 529     origin[NR::Y] = origin[NR::Y] + (screen.extent(NR::Y) * ((1 - padding) / 2));
 530
 531     NR::scale scale(zoom_scale, zoom_scale);
 532     NR::Matrix affine = scale * NR::translate(-origin * scale);
 533
 534     /* Create ArenaItems and set transform */
 535     NRArenaItem *root = sp_item_invoke_show(SP_ITEM(sp_document_root(document)), arena, dkey, SP_ITEM_SHOW_DISPLAY);
 536     nr_arena_item_set_transform(NR_ARENA_ITEM(root), affine);
 537
 538     NRGC gc(NULL);
 539     nr_matrix_set_identity(&gc.transform);
 540
 541     NRRectL final_bbox;
 542     final_bbox.x0 = 0;
 543     final_bbox.y0 = 0;//row;
 544     final_bbox.x1 = width;
 545     final_bbox.y1 = height;//row + num_rows;
 546
 547     nr_arena_item_invoke_update(root, &final_bbox, &gc, NR_ARENA_ITEM_STATE_ALL, NR_ARENA_ITEM_STATE_NONE);
 548
 549     guchar *px = g_new(guchar, 4 * width * height);
 550
 551     NRPixBlock B;
 552     nr_pixblock_setup_extern( &B, NR_PIXBLOCK_MODE_R8G8B8A8N,
 553                               final_bbox.x0, final_bbox.y0, final_bbox.x1, final_bbox.y1,
 554                               px, 4 * width, FALSE, FALSE );
 555
 556     SPNamedView *nv = sp_desktop_namedview(desktop);
 557     unsigned long bgcolor = nv->pagecolor;
 558
 559     unsigned char dtc[4];
 560     dtc[0] = NR_RGBA32_R(bgcolor);
 561     dtc[1] = NR_RGBA32_G(bgcolor);
 562     dtc[2] = NR_RGBA32_B(bgcolor);
 563     dtc[3] = NR_RGBA32_A(bgcolor);
 564
 565     for (int fy = 0; fy < height; fy++) {
 566         guchar *p = NR_PIXBLOCK_PX(&B) + fy * B.rs;
 567         for (int fx = 0; fx < width; fx++) {
 568             for (int i = 0; i < 4; i++) {
 569                 *p++ = dtc[i];
 570             }
 571         }
 572     }
 573
 574     nr_arena_item_invoke_render(NULL, root, &final_bbox, &B, NR_ARENA_ITEM_RENDER_NO_CACHE );
 575     nr_pixblock_release(&B);
 576
 577     // Hide items
 578     sp_item_invoke_hide(SP_ITEM(sp_document_root(document)), dkey);
 579
 580     nr_arena_item_unref(root);
 581     nr_object_unref((NRObject *) arena);
 582
 583     guchar *trace_px = g_new(guchar, 4 * width * height);
 584     memset(trace_px, 0x00, 4 * width * height);
 585
 586     std::deque<NR::Point> fill_queue;
 587     std::queue<NR::Point> color_queue;
 588
 589     std::vector<NR::Point> fill_points;
 590
 591     if (is_point_fill) {
 592         fill_points.push_back(NR::Point(event->button.x, event->button.y));
 593     } else {
 594         Inkscape::Rubberband::Rubberband *r = Inkscape::Rubberband::get();
 595         fill_points = r->getPoints();
 596     }
 597
 598     for (unsigned int i = 0; i < fill_points.size(); i++) {
 599         NR::Point pw = NR::Point(fill_points[i][NR::X] / zoom_scale, sp_document_height(document) + (fill_points[i][NR::Y] / zoom_scale)) * affine;
 600
 601         pw[NR::X] = (int)MIN(width - 1, MAX(0, pw[NR::X]));
 602         pw[NR::Y] = (int)MIN(height - 1, MAX(0, pw[NR::Y]));
 603
 604         if (is_touch_fill) {
 605             if (i == 0) {
 606                 color_queue.push(pw);
 607             } else {
 608                 fill_queue.push_back(pw);
 609             }
 610         } else {
 611             color_queue.push(pw);
 612         }
 613     }
 614
 615     bool aborted = false;
 616     int y_limit = height - 1;
 617
 618     PaintBucketChannels method = (PaintBucketChannels)prefs_get_int_attribute("tools.paintbucket", "channels", 0);
 619     int threshold = prefs_get_int_attribute_limited("tools.paintbucket", "threshold", 1, 0, 100);
 620
 621     switch(method) {
 622         case FLOOD_CHANNELS_ALPHA:
 623         case FLOOD_CHANNELS_RGB:
 624         case FLOOD_CHANNELS_R:
 625         case FLOOD_CHANNELS_G:
 626         case FLOOD_CHANNELS_B:
 627             threshold = (255 * threshold) / 100;
 628             break;
 629         case FLOOD_CHANNELS_H:
 630         case FLOOD_CHANNELS_S:
 631         case FLOOD_CHANNELS_L:
 632             break;
 633       }
 634
 635     bool reached_screen_boundary = false;
 636
 637     bitmap_coords_info bci;
 638
 639     bci.y_limit = y_limit;
 640     bci.width = width;
 641     bci.threshold = threshold;
 642     bci.method = method;
 643     bci.bbox = *bbox;
 644     bci.screen = screen;
 645     bci.dtc = dtc;
 646
 647     while (!color_queue.empty() && !aborted) {
 648         NR::Point color_point = color_queue.front();
 649         color_queue.pop();
 650
 651         unsigned char *orig_px = get_pixel(px, (int)color_point[NR::X], (int)color_point[NR::Y], width);
 652         unsigned char orig_color[4];
 653         for (int i = 0; i < 4; i++) { orig_color[i] = orig_px[i]; }
 654
 655         unsigned char merged_orig[4];
 656
 657         merge_pixel_with_background(orig_color, dtc, merged_orig);
 658
 659         unsigned char *trace_t = get_pixel(trace_px, (int)color_point[NR::X], (int)color_point[NR::Y], width);
 660         if ((trace_t[0] != 255) && (trace_t[3] != 255)) {
 661           fill_queue.push_front(color_point);
 662         }
 663
 664         while (!fill_queue.empty() && !aborted) {
 665             NR::Point cp = fill_queue.front();
 666             fill_queue.pop_front();
 667
 668             unsigned char *s = get_pixel(px, (int)cp[NR::X], (int)cp[NR::Y], width);
 669
 670             // same color at this point
 671             if (compare_pixels(s, orig_color, dtc, threshold, method)) {
 672                 int x = (int)cp[NR::X];
 673                 int y = (int)cp[NR::Y];
 674
 675                 bool top_fill = true;
 676                 bool bottom_fill = true;
 677
 678                 if (y > 0) {
 679                     top_fill = try_add_to_queue(&fill_queue, px, trace_px, orig_color, dtc, x, y - 1, width, threshold, method, top_fill);
 680                 } else {
 681                     if (bbox->min()[NR::Y] > screen.min()[NR::Y]) {
 682                         aborted = true; break;
 683                     } else {
 684                         reached_screen_boundary = true;
 685                     }
 686                 }
 687                 if (y < y_limit) {
 688                     bottom_fill = try_add_to_queue(&fill_queue, px, trace_px, orig_color, dtc, x, y + 1, width, threshold, method, bottom_fill);
 689                   } else {
 690                       if (bbox->max()[NR::Y] < screen.max()[NR::Y]) {
 691                           aborted = true; break;
 692                       } else {
 693                           reached_screen_boundary = true;
 694                       }
 695                 }
 696
 697                 bci.is_left = true;
 698                 bci.x = x;
 699                 bci.y = y;
 700                 bci.top_fill = top_fill;
 701                 bci.bottom_fill = bottom_fill;
 702
 703                 ScanlineCheckResult result = perform_bitmap_scanline_check(&fill_queue, px, trace_px, orig_color, bci);
 704
 705                 switch (result) {
 706                     case SCANLINE_CHECK_ABORTED:
 707                         aborted = true;
 708                         break;
 709                     case SCANLINE_CHECK_BOUNDARY:
 710                         reached_screen_boundary = true;
 711                         break;
 712                     default:
 713                         break;
 714                 }
 715
 716                 bci.is_left = false;
 717                 bci.x = x + 1;
 718                 bci.y = y;
 719                 bci.top_fill = top_fill;
 720                 bci.bottom_fill = bottom_fill;
 721
 722                 result = perform_bitmap_scanline_check(&fill_queue, px, trace_px, orig_color, bci);
 723
 724                 switch (result) {
 725                     case SCANLINE_CHECK_ABORTED:
 726                         aborted = true;
 727                         break;
 728                     case SCANLINE_CHECK_BOUNDARY:
 729                         reached_screen_boundary = true;
 730                         break;
 731                     default:
 732                         break;
 733                 }
 734             }
 735         }
 736     }
 737
 738     g_free(px);
 739
 740     if (aborted) {
 741         g_free(trace_px);
 742         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("<b>Area is not bounded</b>, cannot fill."));
 743         return;
 744     }
 745
 746     if (reached_screen_boundary) {
 747         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."));
 748     }
 749
 750     GdkPixbuf* pixbuf = gdk_pixbuf_new_from_data(trace_px,
 751                                       GDK_COLORSPACE_RGB,
 752                                       TRUE,
 753                                       8, width, height, width * 4,
 754                                       (GdkPixbufDestroyNotify)g_free,
 755                                       NULL);
 756
 757     NR::Matrix inverted_affine = NR::Matrix(affine).inverse();
 758
 759     do_trace(pixbuf, desktop, inverted_affine, union_with_selection);
 760
 761     g_free(trace_px);
 762
 763     sp_document_done(document, SP_VERB_CONTEXT_PAINTBUCKET, _("Fill bounded area"));
 764 }
 765
 766 static gint sp_flood_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event)
 767 {
 768     gint ret = FALSE;
 769
 770     SPDesktop *desktop = event_context->desktop;
 771
 772     switch (event->type) {
 773     case GDK_BUTTON_PRESS:
 774         if (event->button.state & GDK_CONTROL_MASK) {
 775             NR::Point const button_w(event->button.x,
 776                                     event->button.y);
 777
 778             SPItem *item = sp_event_context_find_item (desktop, button_w, TRUE, TRUE);
 779
 780             Inkscape::XML::Node *pathRepr = SP_OBJECT_REPR(item);
 781             /* Set style */
 782             sp_desktop_apply_style_tool (desktop, pathRepr, "tools.paintbucket", false);
 783             sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_PAINTBUCKET, _("Set style on object"));
 784             ret = TRUE;
 785         }
 786         break;
 787     default:
 788         break;
 789     }
 790
 791     if (((SPEventContextClass *) parent_class)->item_handler) {
 792         ret = ((SPEventContextClass *) parent_class)->item_handler(event_context, item, event);
 793     }
 794
 795     return ret;
 796 }
 797
 798 static gint sp_flood_context_root_handler(SPEventContext *event_context, GdkEvent *event)
 799 {
 800     static bool dragging;
 801
 802     gint ret = FALSE;
 803     SPDesktop *desktop = event_context->desktop;
 804
 805     switch (event->type) {
 806     case GDK_BUTTON_PRESS:
 807         if ( event->button.button == 1 ) {
 808             if (!(event->button.state & GDK_CONTROL_MASK)) {
 809                 NR::Point const button_w(event->button.x,
 810                                         event->button.y);
 811
 812                 if (Inkscape::have_viable_layer(desktop, event_context->defaultMessageContext())) {
 813                     // save drag origin
 814                     event_context->xp = (gint) button_w[NR::X];
 815                     event_context->yp = (gint) button_w[NR::Y];
 816                     event_context->within_tolerance = true;
 817
 818                     dragging = true;
 819
 820                     NR::Point const p(desktop->w2d(button_w));
 821                     Inkscape::Rubberband::get()->setMode(RUBBERBAND_MODE_TOUCHPATH);
 822                     Inkscape::Rubberband::get()->start(desktop, p);
 823                 }
 824             }
 825         }
 826     case GDK_MOTION_NOTIFY:
 827         if ( dragging
 828              && ( event->motion.state & GDK_BUTTON1_MASK ) )
 829         {
 830             if ( event_context->within_tolerance
 831                  && ( abs( (gint) event->motion.x - event_context->xp ) < event_context->tolerance )
 832                  && ( abs( (gint) event->motion.y - event_context->yp ) < event_context->tolerance ) ) {
 833                 break; // do not drag if we're within tolerance from origin
 834             }
 835
 836             event_context->within_tolerance = false;
 837
 838             NR::Point const motion_pt(event->motion.x, event->motion.y);
 839             NR::Point const p(desktop->w2d(motion_pt));
 840             if (Inkscape::Rubberband::get()->is_started()) {
 841                 Inkscape::Rubberband::get()->move(p);
 842                 event_context->defaultMessageContext()->set(Inkscape::NORMAL_MESSAGE, _("<b>Draw over</b> areas to add to fill, hold <b>Alt</b> for touch fill"));
 843                 gobble_motion_events(GDK_BUTTON1_MASK);
 844             }
 845         }
 846         break;
 847
 848     case GDK_BUTTON_RELEASE:
 849         if ( event->button.button == 1 ) {
 850             Inkscape::Rubberband::Rubberband *r = Inkscape::Rubberband::get();
 851             if (r->is_started()) {
 852                 // set "busy" cursor
 853                 desktop->setWaitingCursor();
 854
 855                 if (SP_IS_EVENT_CONTEXT(event_context)) {
 856                     // Since setWaitingCursor runs main loop iterations, we may have already left this tool!
 857                     // So check if the tool is valid before doing anything
 858                     dragging = false;
 859
 860                     bool is_point_fill = event_context->within_tolerance;
 861                     bool is_touch_fill = event->button.state & GDK_MOD1_MASK;
 862
 863                     sp_flood_do_flood_fill(event_context, event, event->button.state & GDK_SHIFT_MASK, is_point_fill, is_touch_fill);
 864
 865                     desktop->clearWaitingCursor();
 866                     // restore cursor when done; note that it may already be different if e.g. user
 867                     // switched to another tool during interruptible tracing or drawing, in which case do nothing
 868
 869                     ret = TRUE;
 870                 }
 871
 872                 r->stop();
 873                 event_context->defaultMessageContext()->clear();
 874             }
 875         }
 876         break;
 877     case GDK_KEY_PRESS:
 878         switch (get_group0_keyval (&event->key)) {
 879         case GDK_Up:
 880         case GDK_Down:
 881         case GDK_KP_Up:
 882         case GDK_KP_Down:
 883             // prevent the zoom field from activation
 884             if (!MOD__CTRL_ONLY)
 885                 ret = TRUE;
 886             break;
 887         default:
 888             break;
 889         }
 890         break;
 891     default:
 892         break;
 893     }
 894
 895     if (!ret) {
 896         if (((SPEventContextClass *) parent_class)->root_handler) {
 897             ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
 898         }
 899     }
 900
 901     return ret;
 902 }
 903
 904
 905 static void sp_flood_finish(SPFloodContext *rc)
 906 {
 907     rc->_message_context->clear();
 908
 909     if ( rc->item != NULL ) {
 910         SPDesktop * desktop;
 911
 912         desktop = SP_EVENT_CONTEXT_DESKTOP(rc);
 913
 914         SP_OBJECT(rc->item)->updateRepr();
 915
 916         sp_canvas_end_forced_full_redraws(desktop->canvas);
 917
 918         sp_desktop_selection(desktop)->set(rc->item);
 919         sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_PAINTBUCKET,
 920                         _("Fill bounded area"));
 921
 922         rc->item = NULL;
 923     }
 924 }
 925
 926 void flood_channels_set_channels( gint channels )
 927 {
 928     prefs_set_int_attribute("tools.paintbucket", "channels", channels);
 929 }
 930
 931 /*
 932   Local Variables:
 933   mode:c++
 934   c-file-style:"stroustrup"
 935   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 936   indent-tabs-mode:nil
 937   fill-column:99
 938   End:
 939 */
 940 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :