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 GList * flood_autogap_dropdown_items_list() {
 257     GList *glist = NULL;
 258
 259     glist = g_list_append (glist, _("None"));
 260     glist = g_list_append (glist, _("Small"));
 261     glist = g_list_append (glist, _("Medium"));
 262     glist = g_list_append (glist, _("Large"));
 263
 264     return glist;
 265 }
 266
 267 static bool compare_pixels(unsigned char *check, unsigned char *orig, unsigned char *dtc, int threshold, PaintBucketChannels method) {
 268     int diff = 0;
 269     float hsl_check[3], hsl_orig[3];
 270
 271     if ((method == FLOOD_CHANNELS_H) ||
 272         (method == FLOOD_CHANNELS_S) ||
 273         (method == FLOOD_CHANNELS_L)) {
 274         sp_color_rgb_to_hsl_floatv(hsl_check, check[0] / 255.0, check[1] / 255.0, check[2] / 255.0);
 275         sp_color_rgb_to_hsl_floatv(hsl_orig, orig[0] / 255.0, orig[1] / 255.0, orig[2] / 255.0);
 276     }
 277
 278     switch (method) {
 279         case FLOOD_CHANNELS_ALPHA:
 280             return ((int)abs(check[3] - orig[3]) <= threshold);
 281         case FLOOD_CHANNELS_R:
 282             return ((int)abs(check[0] - orig[0]) <= threshold);
 283         case FLOOD_CHANNELS_G:
 284             return ((int)abs(check[1] - orig[1]) <= threshold);
 285         case FLOOD_CHANNELS_B:
 286             return ((int)abs(check[2] - orig[2]) <= threshold);
 287         case FLOOD_CHANNELS_RGB:
 288             unsigned char merged_orig[4];
 289             unsigned char merged_check[4];
 290
 291             merge_pixel_with_background(orig, dtc, merged_orig);
 292             merge_pixel_with_background(check, dtc, merged_check);
 293
 294             for (int i = 0; i < 3; i++) {
 295               diff += (int)abs(merged_check[i] - merged_orig[i]);
 296             }
 297             return ((diff / 3) <= ((threshold * 3) / 4));
 298
 299         case FLOOD_CHANNELS_H:
 300             return ((int)(fabs(hsl_check[0] - hsl_orig[0]) * 100.0) <= threshold);
 301         case FLOOD_CHANNELS_S:
 302             return ((int)(fabs(hsl_check[1] - hsl_orig[1]) * 100.0) <= threshold);
 303         case FLOOD_CHANNELS_L:
 304             return ((int)(fabs(hsl_check[2] - hsl_orig[2]) * 100.0) <= threshold);
 305     }
 306
 307     return false;
 308 }
 309
 310 static bool is_pixel_checked(unsigned char *t) { return t[0] == 1; }
 311 static bool is_pixel_queued(unsigned char *t) { return t[1] == 1; }
 312 static bool is_pixel_paintability_checked(unsigned char *t) { return t[2] != 0; }
 313 static bool is_pixel_paintable(unsigned char *t) { return t[2] == 1; }
 314 static bool is_pixel_colored(unsigned char *t) { return t[3] == 255; }
 315
 316 static void mark_pixel_checked(unsigned char *t) { t[0] = 1; }
 317 static void mark_pixel_queued(unsigned char *t) { t[1] = 1; }
 318 static void mark_pixel_paintable(unsigned char *t) { t[2] = 1; }
 319 static void mark_pixel_not_paintable(unsigned char *t) { t[2] = 2; }
 320 static void mark_pixel_colored(unsigned char *t) { t[3] = 255; }
 321
 322 static void clear_pixel_paintability(unsigned char *t) { t[2] = 0; }
 323
 324 struct bitmap_coords_info {
 325     bool is_left;
 326     int x;
 327     int y;
 328     int y_limit;
 329     int width;
 330     int height;
 331     int threshold;
 332     int radius;
 333     PaintBucketChannels method;
 334     unsigned char *dtc;
 335     NR::Rect bbox;
 336     NR::Rect screen;
 337     unsigned int max_queue_size;
 338     unsigned int max_vertical_check;
 339 };
 340
 341 static bool check_if_pixel_is_paintable(guchar *px, guchar *trace_px, int x, int y, unsigned char *orig_color, bitmap_coords_info bci) {
 342     unsigned char *trace_t = get_pixel(trace_px, x, y, bci.width);
 343     if (is_pixel_paintability_checked(trace_t)) {
 344         return is_pixel_paintable(trace_t);
 345     } else {
 346         unsigned char *t = get_pixel(px, x, y, bci.width);
 347         if (compare_pixels(t, orig_color, bci.dtc, bci.threshold, bci.method)) {
 348             mark_pixel_paintable(trace_t);
 349             return true;
 350         } else {
 351             mark_pixel_not_paintable(trace_t);
 352             return false;
 353         }
 354     }
 355 }
 356
 357 static bool try_add_to_queue(std::deque<NR::Point> *fill_queue, guchar *px, guchar *trace_px, unsigned char *orig, int x, int y, int width, bitmap_coords_info bci, unsigned int max_queue_size) {
 358     unsigned char *trace_t = get_pixel(trace_px, x, y, width);
 359     if (!(is_pixel_checked(trace_t) || is_pixel_queued(trace_t))) {
 360         if (check_if_pixel_is_paintable(px, trace_px, x, y, orig, bci)) {
 361             if ((fill_queue->size() < max_queue_size)) {
 362                 fill_queue->push_back(NR::Point(x, y));
 363                 mark_pixel_queued(trace_t);
 364             }
 365         }
 366     }
 367     return true;
 368 }
 369
 370 static void do_trace(GdkPixbuf *px, SPDesktop *desktop, NR::Matrix transform, bool union_with_selection) {
 371     SPDocument *document = sp_desktop_document(desktop);
 372
 373     Inkscape::Trace::Potrace::PotraceTracingEngine pte;
 374
 375     pte.setTraceType(Inkscape::Trace::Potrace::TRACE_BRIGHTNESS);
 376     pte.setInvert(false);
 377
 378     Glib::RefPtr<Gdk::Pixbuf> pixbuf = Glib::wrap(px, true);
 379
 380     std::vector<Inkscape::Trace::TracingEngineResult> results = pte.trace(pixbuf);
 381
 382     Inkscape::XML::Node *layer_repr = SP_GROUP(desktop->currentLayer())->repr;
 383     Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
 384
 385     long totalNodeCount = 0L;
 386
 387     double offset = prefs_get_double_attribute("tools.paintbucket", "offset", 0.0);
 388
 389     for (unsigned int i=0 ; i<results.size() ; i++) {
 390         Inkscape::Trace::TracingEngineResult result = results[i];
 391         totalNodeCount += result.getNodeCount();
 392
 393         Inkscape::XML::Node *pathRepr = xml_doc->createElement("svg:path");
 394         /* Set style */
 395         sp_desktop_apply_style_tool (desktop, pathRepr, "tools.paintbucket", false);
 396
 397         NArtBpath *bpath = sp_svg_read_path(result.getPathData().c_str());
 398         Path *path = bpath_to_Path(bpath);
 399         g_free(bpath);
 400
 401         if (offset != 0) {
 402
 403             Shape *path_shape = new Shape();
 404
 405             path->ConvertWithBackData(0.03);
 406             path->Fill(path_shape, 0);
 407             delete path;
 408
 409             Shape *expanded_path_shape = new Shape();
 410
 411             expanded_path_shape->ConvertToShape(path_shape, fill_nonZero);
 412             path_shape->MakeOffset(expanded_path_shape, offset * desktop->current_zoom(), join_round, 4);
 413             expanded_path_shape->ConvertToShape(path_shape, fill_positive);
 414
 415             Path *expanded_path = new Path();
 416
 417             expanded_path->Reset();
 418             expanded_path_shape->ConvertToForme(expanded_path);
 419             expanded_path->ConvertEvenLines(1.0);
 420             expanded_path->Simplify(1.0);
 421
 422             delete path_shape;
 423             delete expanded_path_shape;
 424
 425             gchar *str = expanded_path->svg_dump_path();
 426             if (str && *str) {
 427                 pathRepr->setAttribute("d", str);
 428                 g_free(str);
 429             } else {
 430                 desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("<b>Too much inset</b>, the result is empty."));
 431                 Inkscape::GC::release(pathRepr);
 432                 g_free(str);
 433                 return;
 434             }
 435
 436             delete expanded_path;
 437
 438         } else {
 439             gchar *str = path->svg_dump_path();
 440             delete path;
 441             pathRepr->setAttribute("d", str);
 442             g_free(str);
 443         }
 444
 445         layer_repr->addChild(pathRepr, NULL);
 446
 447         SPObject *reprobj = document->getObjectByRepr(pathRepr);
 448         if (reprobj) {
 449             sp_item_write_transform(SP_ITEM(reprobj), pathRepr, transform, NULL);
 450
 451             // premultiply the item transform by the accumulated parent transform in the paste layer
 452             NR::Matrix local = sp_item_i2doc_affine(SP_GROUP(desktop->currentLayer()));
 453             if (!local.test_identity()) {
 454                 gchar const *t_str = pathRepr->attribute("transform");
 455                 NR::Matrix item_t (NR::identity());
 456                 if (t_str)
 457                     sp_svg_transform_read(t_str, &item_t);
 458                 item_t *= local.inverse();
 459                 // (we're dealing with unattached repr, so we write to its attr instead of using sp_item_set_transform)
 460                 gchar *affinestr=sp_svg_transform_write(item_t);
 461                 pathRepr->setAttribute("transform", affinestr);
 462                 g_free(affinestr);
 463             }
 464
 465             Inkscape::Selection *selection = sp_desktop_selection(desktop);
 466
 467             pathRepr->setPosition(-1);
 468
 469             if (union_with_selection) {
 470                 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)));
 471                 selection->add(reprobj);
 472                 sp_selected_path_union_skip_undo();
 473             } else {
 474                 desktop->messageStack()->flashF(Inkscape::WARNING_MESSAGE, _("Area filled, path with <b>%d</b> nodes created."), sp_nodes_in_path(SP_PATH(reprobj)));
 475                 selection->set(reprobj);
 476             }
 477
 478         }
 479
 480         Inkscape::GC::release(pathRepr);
 481
 482     }
 483 }
 484
 485 enum ScanlineCheckResult {
 486     SCANLINE_CHECK_OK,
 487     SCANLINE_CHECK_ABORTED,
 488     SCANLINE_CHECK_BOUNDARY
 489 };
 490
 491 static bool coords_in_range(int x, int y, bitmap_coords_info bci) {
 492     return (x >= 0)
 493           && (x < bci.width)
 494           && (y >= 0)
 495           && (y < bci.height);
 496 }
 497
 498 #define PAINT_DIRECTION_LEFT 1
 499 #define PAINT_DIRECTION_RIGHT 2
 500 #define PAINT_DIRECTION_UP 4
 501 #define PAINT_DIRECTION_DOWN 8
 502 #define PAINT_DIRECTION_ALL 15
 503
 504 static unsigned int paint_pixel(guchar *px, guchar *trace_px, unsigned char *orig_color, bitmap_coords_info bci) {
 505     unsigned char *trace_t;
 506
 507     if (bci.radius == 0) {
 508         trace_t = get_pixel(trace_px, bci.x, bci.y, bci.width);
 509         mark_pixel_colored(trace_t);
 510         return PAINT_DIRECTION_ALL;
 511     } else {
 512         bool can_paint_up = true;
 513         bool can_paint_down = true;
 514         bool can_paint_left = true;
 515         bool can_paint_right = true;
 516
 517         for (int y = -bci.radius; y <= bci.radius; y++) {
 518             int ty = bci.y + y;
 519             for (int x = -bci.radius; x <= bci.radius; x++) {
 520                 int tx = bci.x + x;
 521
 522                 if (coords_in_range(tx, ty, bci)) {
 523                     trace_t = get_pixel(trace_px, tx, ty, bci.width);
 524                     if (!is_pixel_colored(trace_t)) {
 525                         if (check_if_pixel_is_paintable(px, trace_px, tx, ty, orig_color, bci)) {
 526                             mark_pixel_colored(trace_t);
 527                         } else {
 528                             if (x < 0) { can_paint_left = false; }
 529                             if (x > 0) { can_paint_right = false; }
 530                             if (y < 0) { can_paint_up = false; }
 531                             if (y > 0) { can_paint_down = false; }
 532                         }
 533                     }
 534                 }
 535             }
 536         }
 537
 538         unsigned int paint_directions = 0;
 539         if (can_paint_left) { paint_directions += PAINT_DIRECTION_LEFT; }
 540         if (can_paint_right) { paint_directions += PAINT_DIRECTION_RIGHT; }
 541         if (can_paint_up) { paint_directions += PAINT_DIRECTION_UP; }
 542         if (can_paint_down) { paint_directions += PAINT_DIRECTION_DOWN; }
 543
 544         return paint_directions;
 545     }
 546 }
 547
 548 static unsigned int paint_leading_edge(guchar *px, guchar *trace_px, unsigned char *orig_color, bitmap_coords_info bci, unsigned int direction) {
 549     unsigned char *trace_t;
 550
 551     if (bci.radius > 0) {
 552         bool can_paint_up = true;
 553         bool can_paint_down = true;
 554         bool can_paint_left = true;
 555         bool can_paint_right = true;
 556
 557         int tx = bci.x;
 558
 559         switch (direction) {
 560           case PAINT_DIRECTION_LEFT:
 561             tx = bci.x - bci.radius;
 562             break;
 563           case PAINT_DIRECTION_RIGHT:
 564             tx = bci.x + bci.radius;
 565             break;
 566         }
 567
 568         for (int y = -bci.radius; y <= bci.radius; y++) {
 569             int ty = bci.y + y;
 570             if (coords_in_range(tx, ty, bci)) {
 571                 trace_t = get_pixel(trace_px, tx, ty, bci.width);
 572                 if (!is_pixel_colored(trace_t)) {
 573                     if (check_if_pixel_is_paintable(px, trace_px, tx, ty, orig_color, bci)) {
 574                         mark_pixel_colored(trace_t);
 575                     } else {
 576                         if (direction == PAINT_DIRECTION_LEFT) { can_paint_left = false; }
 577                         if (direction == PAINT_DIRECTION_RIGHT) { can_paint_right = false; }
 578                         if (y < 0) { can_paint_up = false; }
 579                         if (y > 0) { can_paint_down = false; }
 580                     }
 581                 }
 582             }
 583         }
 584
 585         unsigned int paint_directions = 0;
 586         if (can_paint_left) { paint_directions += PAINT_DIRECTION_LEFT; }
 587         if (can_paint_right) { paint_directions += PAINT_DIRECTION_RIGHT; }
 588         if (can_paint_up) { paint_directions += PAINT_DIRECTION_UP; }
 589         if (can_paint_down) { paint_directions += PAINT_DIRECTION_DOWN; }
 590
 591         return paint_directions;
 592     } else {
 593         return 0;
 594     }
 595 }
 596
 597 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) {
 598     bool aborted = false;
 599     bool reached_screen_boundary = false;
 600     bool ok;
 601
 602     bool keep_tracing;
 603     bool initial_paint = true;
 604
 605     int vertical_check_count = 0;
 606
 607     do {
 608         ok = false;
 609         if (bci.is_left) {
 610             keep_tracing = (bci.x >= 0);
 611         } else {
 612             keep_tracing = (bci.x < bci.width);
 613         }
 614
 615         if (keep_tracing) {
 616             if (check_if_pixel_is_paintable(px, trace_px, bci.x, bci.y, orig_color, bci)) {
 617                 unsigned int paint_directions;
 618                 if ((bci.radius == 0) || ((bci.radius > 0) && initial_paint)) {
 619                     paint_directions = paint_pixel(px, trace_px, orig_color, bci);
 620                 } else {
 621                     if (bci.is_left) {
 622                         paint_directions = paint_leading_edge(px, trace_px, orig_color, bci, PAINT_DIRECTION_LEFT);
 623                     } else {
 624                         paint_directions = paint_leading_edge(px, trace_px, orig_color, bci, PAINT_DIRECTION_RIGHT);
 625                     }
 626                 }
 627                 initial_paint = false;
 628
 629                 if (vertical_check_count == 0) {
 630                     if (paint_directions & PAINT_DIRECTION_UP) {
 631                         try_add_to_queue(fill_queue, px, trace_px, orig_color, bci.x, bci.y - 1, bci.width, bci, bci.max_queue_size);
 632                     }
 633                     if (paint_directions & PAINT_DIRECTION_DOWN) {
 634                         try_add_to_queue(fill_queue, px, trace_px, orig_color, bci.x, bci.y + 1, bci.width, bci, bci.max_queue_size);
 635                     }
 636                 }
 637
 638                 if (bci.max_vertical_check > 0) {
 639                     vertical_check_count = (vertical_check_count + 1) % bci.max_vertical_check;
 640                 }
 641
 642                 if (bci.is_left) {
 643                     if (paint_directions & PAINT_DIRECTION_LEFT) {
 644                         bci.x -= 1;
 645                         ok = true;
 646                     }
 647                 } else {
 648                     if (paint_directions & PAINT_DIRECTION_RIGHT) {
 649                         bci.x += 1;
 650                         ok = true;
 651                     }
 652                 }
 653             }
 654         } else {
 655             if (bci.bbox.min()[NR::X] > bci.screen.min()[NR::X]) {
 656                 aborted = true; break;
 657             } else {
 658                 reached_screen_boundary = true;
 659             }
 660         }
 661     } while (ok);
 662
 663     if (aborted) { return SCANLINE_CHECK_ABORTED; }
 664     if (reached_screen_boundary) { return SCANLINE_CHECK_BOUNDARY; }
 665     return SCANLINE_CHECK_OK;
 666 }
 667
 668 static void sp_flood_do_flood_fill(SPEventContext *event_context, GdkEvent *event, bool union_with_selection, bool is_point_fill, bool is_touch_fill) {
 669     SPDesktop *desktop = event_context->desktop;
 670     SPDocument *document = sp_desktop_document(desktop);
 671
 672     /* Create new arena */
 673     NRArena *arena = NRArena::create();
 674     unsigned dkey = sp_item_display_key_new(1);
 675
 676     sp_document_ensure_up_to_date (document);
 677
 678     SPItem *document_root = SP_ITEM(SP_DOCUMENT_ROOT(document));
 679     NR::Maybe<NR::Rect> bbox = document_root->getBounds(NR::identity());
 680
 681     if (!bbox) {
 682         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("<b>Area is not bounded</b>, cannot fill."));
 683         return;
 684     }
 685
 686     double zoom_scale = desktop->current_zoom();
 687     double padding = 1.6;
 688
 689     NR::Rect screen = desktop->get_display_area();
 690
 691     int width = (int)ceil(screen.extent(NR::X) * zoom_scale * padding);
 692     int height = (int)ceil(screen.extent(NR::Y) * zoom_scale * padding);
 693
 694     NR::Point origin(screen.min()[NR::X],
 695                      sp_document_height(document) - screen.extent(NR::Y) - screen.min()[NR::Y]);
 696
 697     origin[NR::X] = origin[NR::X] + (screen.extent(NR::X) * ((1 - padding) / 2));
 698     origin[NR::Y] = origin[NR::Y] + (screen.extent(NR::Y) * ((1 - padding) / 2));
 699
 700     NR::scale scale(zoom_scale, zoom_scale);
 701     NR::Matrix affine = scale * NR::translate(-origin * scale);
 702
 703     /* Create ArenaItems and set transform */
 704     NRArenaItem *root = sp_item_invoke_show(SP_ITEM(sp_document_root(document)), arena, dkey, SP_ITEM_SHOW_DISPLAY);
 705     nr_arena_item_set_transform(NR_ARENA_ITEM(root), affine);
 706
 707     NRGC gc(NULL);
 708     nr_matrix_set_identity(&gc.transform);
 709
 710     NRRectL final_bbox;
 711     final_bbox.x0 = 0;
 712     final_bbox.y0 = 0;//row;
 713     final_bbox.x1 = width;
 714     final_bbox.y1 = height;//row + num_rows;
 715
 716     nr_arena_item_invoke_update(root, &final_bbox, &gc, NR_ARENA_ITEM_STATE_ALL, NR_ARENA_ITEM_STATE_NONE);
 717
 718     guchar *px = g_new(guchar, 4 * width * height);
 719
 720     NRPixBlock B;
 721     nr_pixblock_setup_extern( &B, NR_PIXBLOCK_MODE_R8G8B8A8N,
 722                               final_bbox.x0, final_bbox.y0, final_bbox.x1, final_bbox.y1,
 723                               px, 4 * width, FALSE, FALSE );
 724
 725     SPNamedView *nv = sp_desktop_namedview(desktop);
 726     unsigned long bgcolor = nv->pagecolor;
 727
 728     unsigned char dtc[4];
 729     dtc[0] = NR_RGBA32_R(bgcolor);
 730     dtc[1] = NR_RGBA32_G(bgcolor);
 731     dtc[2] = NR_RGBA32_B(bgcolor);
 732     dtc[3] = NR_RGBA32_A(bgcolor);
 733
 734     for (int fy = 0; fy < height; fy++) {
 735         guchar *p = NR_PIXBLOCK_PX(&B) + fy * B.rs;
 736         for (int fx = 0; fx < width; fx++) {
 737             for (int i = 0; i < 4; i++) {
 738                 *p++ = dtc[i];
 739             }
 740         }
 741     }
 742
 743     nr_arena_item_invoke_render(NULL, root, &final_bbox, &B, NR_ARENA_ITEM_RENDER_NO_CACHE );
 744     nr_pixblock_release(&B);
 745
 746     // Hide items
 747     sp_item_invoke_hide(SP_ITEM(sp_document_root(document)), dkey);
 748
 749     nr_arena_item_unref(root);
 750     nr_object_unref((NRObject *) arena);
 751
 752     guchar *trace_px = g_new(guchar, 4 * width * height);
 753     memset(trace_px, 0x00, 4 * width * height);
 754
 755     std::deque<NR::Point> fill_queue;
 756     std::queue<NR::Point> color_queue;
 757
 758     std::vector<NR::Point> fill_points;
 759
 760     if (is_point_fill) {
 761         fill_points.push_back(NR::Point(event->button.x, event->button.y));
 762     } else {
 763         Inkscape::Rubberband::Rubberband *r = Inkscape::Rubberband::get();
 764         fill_points = r->getPoints();
 765     }
 766
 767     for (unsigned int i = 0; i < fill_points.size(); i++) {
 768         NR::Point pw = NR::Point(fill_points[i][NR::X] / zoom_scale, sp_document_height(document) + (fill_points[i][NR::Y] / zoom_scale)) * affine;
 769
 770         pw[NR::X] = (int)MIN(width - 1, MAX(0, pw[NR::X]));
 771         pw[NR::Y] = (int)MIN(height - 1, MAX(0, pw[NR::Y]));
 772
 773         if (is_touch_fill) {
 774             if (i == 0) {
 775                 color_queue.push(pw);
 776             } else {
 777                 fill_queue.push_back(pw);
 778             }
 779         } else {
 780             color_queue.push(pw);
 781         }
 782     }
 783
 784     bool aborted = false;
 785     int y_limit = height - 1;
 786
 787     PaintBucketChannels method = (PaintBucketChannels)prefs_get_int_attribute("tools.paintbucket", "channels", 0);
 788     int threshold = prefs_get_int_attribute_limited("tools.paintbucket", "threshold", 1, 0, 100);
 789
 790     switch(method) {
 791         case FLOOD_CHANNELS_ALPHA:
 792         case FLOOD_CHANNELS_RGB:
 793         case FLOOD_CHANNELS_R:
 794         case FLOOD_CHANNELS_G:
 795         case FLOOD_CHANNELS_B:
 796             threshold = (255 * threshold) / 100;
 797             break;
 798         case FLOOD_CHANNELS_H:
 799         case FLOOD_CHANNELS_S:
 800         case FLOOD_CHANNELS_L:
 801             break;
 802       }
 803
 804     bool reached_screen_boundary = false;
 805
 806     bitmap_coords_info bci;
 807
 808     bci.y_limit = y_limit;
 809     bci.width = width;
 810     bci.height = height;
 811     bci.threshold = threshold;
 812     bci.method = method;
 813     bci.bbox = *bbox;
 814     bci.screen = screen;
 815     bci.dtc = dtc;
 816     bci.radius = prefs_get_int_attribute_limited("tools.paintbucket", "autogap", 0, 0, 3);
 817     bci.max_queue_size = width * height;
 818     bci.max_vertical_check = prefs_get_int_attribute_limited("tools.paintbucket", "fillaccuracy", 0, 0, 5);
 819
 820     bool first_run = true;
 821
 822 //     Time values to measure each buffer's paint time
 823 //     GTimeVal tstart, tfinish;
 824
 825 //     g_get_current_time (&tstart);
 826
 827     while (!color_queue.empty() && !aborted) {
 828         NR::Point color_point = color_queue.front();
 829         color_queue.pop();
 830
 831         unsigned char *orig_px = get_pixel(px, (int)color_point[NR::X], (int)color_point[NR::Y], width);
 832         unsigned char orig_color[4];
 833         for (int i = 0; i < 4; i++) { orig_color[i] = orig_px[i]; }
 834
 835         unsigned char merged_orig[4];
 836
 837         merge_pixel_with_background(orig_color, dtc, merged_orig);
 838
 839         unsigned char *trace_t = get_pixel(trace_px, (int)color_point[NR::X], (int)color_point[NR::Y], width);
 840         if (!is_pixel_checked(trace_t) && !is_pixel_colored(trace_t)) {
 841             fill_queue.push_front(color_point);
 842
 843             if (!first_run) {
 844                 for (int y = 0; y < height; y++) {
 845                     for (int x = 0; x < width; x++) {
 846                         trace_t = get_pixel(trace_px, x, y, width);
 847                         clear_pixel_paintability(trace_t);
 848                     }
 849                 }
 850             }
 851             first_run = false;
 852         }
 853
 854         while (!fill_queue.empty() && !aborted) {
 855             NR::Point cp = fill_queue.front();
 856             fill_queue.pop_front();
 857
 858             unsigned char *trace_t = get_pixel(trace_px, (int)cp[NR::X], (int)cp[NR::Y], width);
 859             if (!is_pixel_checked(trace_t)) {
 860                 mark_pixel_checked(trace_t);
 861
 862                 int x = (int)cp[NR::X];
 863                 int y = (int)cp[NR::Y];
 864
 865                 // same color at this point
 866                 if (check_if_pixel_is_paintable(px, trace_px, x, y, orig_color, bci)) {
 867                     if (y == 0) {
 868                         if (bbox->min()[NR::Y] > screen.min()[NR::Y]) {
 869                             aborted = true; break;
 870                         } else {
 871                             reached_screen_boundary = true;
 872                         }
 873                     }
 874
 875                     if (y == y_limit) {
 876                         if (bbox->max()[NR::Y] < screen.max()[NR::Y]) {
 877                             aborted = true; break;
 878                         } else {
 879                             reached_screen_boundary = true;
 880                         }
 881                     }
 882
 883                     bci.is_left = true;
 884                     bci.x = x;
 885                     bci.y = y;
 886
 887                     ScanlineCheckResult result = perform_bitmap_scanline_check(&fill_queue, px, trace_px, orig_color, bci);
 888
 889                     switch (result) {
 890                         case SCANLINE_CHECK_ABORTED:
 891                             aborted = true;
 892                             break;
 893                         case SCANLINE_CHECK_BOUNDARY:
 894                             reached_screen_boundary = true;
 895                             break;
 896                         default:
 897                             break;
 898                     }
 899
 900                     bci.is_left = false;
 901                     bci.x = x + 1;
 902                     bci.y = y;
 903
 904                     result = perform_bitmap_scanline_check(&fill_queue, px, trace_px, orig_color, bci);
 905
 906                     switch (result) {
 907                         case SCANLINE_CHECK_ABORTED:
 908                             aborted = true;
 909                             break;
 910                         case SCANLINE_CHECK_BOUNDARY:
 911                             reached_screen_boundary = true;
 912                             break;
 913                         default:
 914                             break;
 915                     }
 916                 }
 917             }
 918         }
 919     }
 920
 921 //     g_get_current_time (&tfinish);
 922
 923 //     Remember the slowest_buffer of this paint.
 924 //     glong this_buffer = (tfinish.tv_sec - tstart.tv_sec) * 1000000 + (tfinish.tv_usec - tstart.tv_usec);
 925
 926 //     g_message("time: %ld", this_buffer);
 927
 928     g_free(px);
 929
 930     if (aborted) {
 931         g_free(trace_px);
 932         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("<b>Area is not bounded</b>, cannot fill."));
 933         return;
 934     }
 935
 936     if (reached_screen_boundary) {
 937         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."));
 938     }
 939
 940     GdkPixbuf* pixbuf = gdk_pixbuf_new_from_data(trace_px,
 941                                       GDK_COLORSPACE_RGB,
 942                                       TRUE,
 943                                       8, width, height, width * 4,
 944                                       (GdkPixbufDestroyNotify)g_free,
 945                                       NULL);
 946
 947     NR::Matrix inverted_affine = NR::Matrix(affine).inverse();
 948
 949     do_trace(pixbuf, desktop, inverted_affine, union_with_selection);
 950
 951     g_free(trace_px);
 952
 953     sp_document_done(document, SP_VERB_CONTEXT_PAINTBUCKET, _("Fill bounded area"));
 954 }
 955
 956 static gint sp_flood_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event)
 957 {
 958     gint ret = FALSE;
 959
 960     SPDesktop *desktop = event_context->desktop;
 961
 962     switch (event->type) {
 963     case GDK_BUTTON_PRESS:
 964         if (event->button.state & GDK_CONTROL_MASK) {
 965             NR::Point const button_w(event->button.x,
 966                                     event->button.y);
 967
 968             SPItem *item = sp_event_context_find_item (desktop, button_w, TRUE, TRUE);
 969
 970             Inkscape::XML::Node *pathRepr = SP_OBJECT_REPR(item);
 971             /* Set style */
 972             sp_desktop_apply_style_tool (desktop, pathRepr, "tools.paintbucket", false);
 973             sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_PAINTBUCKET, _("Set style on object"));
 974             ret = TRUE;
 975         }
 976         break;
 977     default:
 978         break;
 979     }
 980
 981     if (((SPEventContextClass *) parent_class)->item_handler) {
 982         ret = ((SPEventContextClass *) parent_class)->item_handler(event_context, item, event);
 983     }
 984
 985     return ret;
 986 }
 987
 988 static gint sp_flood_context_root_handler(SPEventContext *event_context, GdkEvent *event)
 989 {
 990     static bool dragging;
 991
 992     gint ret = FALSE;
 993     SPDesktop *desktop = event_context->desktop;
 994
 995     switch (event->type) {
 996     case GDK_BUTTON_PRESS:
 997         if ( event->button.button == 1 ) {
 998             if (!(event->button.state & GDK_CONTROL_MASK)) {
 999                 NR::Point const button_w(event->button.x,
1000                                         event->button.y);
1001
1002                 if (Inkscape::have_viable_layer(desktop, event_context->defaultMessageContext())) {
1003                     // save drag origin
1004                     event_context->xp = (gint) button_w[NR::X];
1005                     event_context->yp = (gint) button_w[NR::Y];
1006                     event_context->within_tolerance = true;
1007
1008                     dragging = true;
1009
1010                     NR::Point const p(desktop->w2d(button_w));
1011                     Inkscape::Rubberband::get()->setMode(RUBBERBAND_MODE_TOUCHPATH);
1012                     Inkscape::Rubberband::get()->start(desktop, p);
1013                 }
1014             }
1015         }
1016     case GDK_MOTION_NOTIFY:
1017         if ( dragging
1018              && ( event->motion.state & GDK_BUTTON1_MASK ) )
1019         {
1020             if ( event_context->within_tolerance
1021                  && ( abs( (gint) event->motion.x - event_context->xp ) < event_context->tolerance )
1022                  && ( abs( (gint) event->motion.y - event_context->yp ) < event_context->tolerance ) ) {
1023                 break; // do not drag if we're within tolerance from origin
1024             }
1025
1026             event_context->within_tolerance = false;
1027
1028             NR::Point const motion_pt(event->motion.x, event->motion.y);
1029             NR::Point const p(desktop->w2d(motion_pt));
1030             if (Inkscape::Rubberband::get()->is_started()) {
1031                 Inkscape::Rubberband::get()->move(p);
1032                 event_context->defaultMessageContext()->set(Inkscape::NORMAL_MESSAGE, _("<b>Draw over</b> areas to add to fill, hold <b>Alt</b> for touch fill"));
1033                 gobble_motion_events(GDK_BUTTON1_MASK);
1034             }
1035         }
1036         break;
1037
1038     case GDK_BUTTON_RELEASE:
1039         if ( event->button.button == 1 ) {
1040             Inkscape::Rubberband::Rubberband *r = Inkscape::Rubberband::get();
1041             if (r->is_started()) {
1042                 // set "busy" cursor
1043                 desktop->setWaitingCursor();
1044
1045                 if (SP_IS_EVENT_CONTEXT(event_context)) {
1046                     // Since setWaitingCursor runs main loop iterations, we may have already left this tool!
1047                     // So check if the tool is valid before doing anything
1048                     dragging = false;
1049
1050                     bool is_point_fill = event_context->within_tolerance;
1051                     bool is_touch_fill = event->button.state & GDK_MOD1_MASK;
1052
1053                     sp_flood_do_flood_fill(event_context, event, event->button.state & GDK_SHIFT_MASK, is_point_fill, is_touch_fill);
1054
1055                     desktop->clearWaitingCursor();
1056                     // restore cursor when done; note that it may already be different if e.g. user
1057                     // switched to another tool during interruptible tracing or drawing, in which case do nothing
1058
1059                     ret = TRUE;
1060                 }
1061
1062                 r->stop();
1063                 event_context->defaultMessageContext()->clear();
1064             }
1065         }
1066         break;
1067     case GDK_KEY_PRESS:
1068         switch (get_group0_keyval (&event->key)) {
1069         case GDK_Up:
1070         case GDK_Down:
1071         case GDK_KP_Up:
1072         case GDK_KP_Down:
1073             // prevent the zoom field from activation
1074             if (!MOD__CTRL_ONLY)
1075                 ret = TRUE;
1076             break;
1077         default:
1078             break;
1079         }
1080         break;
1081     default:
1082         break;
1083     }
1084
1085     if (!ret) {
1086         if (((SPEventContextClass *) parent_class)->root_handler) {
1087             ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
1088         }
1089     }
1090
1091     return ret;
1092 }
1093
1094
1095 static void sp_flood_finish(SPFloodContext *rc)
1096 {
1097     rc->_message_context->clear();
1098
1099     if ( rc->item != NULL ) {
1100         SPDesktop * desktop;
1101
1102         desktop = SP_EVENT_CONTEXT_DESKTOP(rc);
1103
1104         SP_OBJECT(rc->item)->updateRepr();
1105
1106         sp_canvas_end_forced_full_redraws(desktop->canvas);
1107
1108         sp_desktop_selection(desktop)->set(rc->item);
1109         sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_PAINTBUCKET,
1110                         _("Fill bounded area"));
1111
1112         rc->item = NULL;
1113     }
1114 }
1115
1116 void flood_channels_set_channels( gint channels )
1117 {
1118     prefs_set_int_attribute("tools.paintbucket", "channels", channels);
1119 }
1120
1121 /*
1122   Local Variables:
1123   mode:c++
1124   c-file-style:"stroustrup"
1125   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1126   indent-tabs-mode:nil
1127   fill-column:99
1128   End:
1129 */
1130 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :