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     int precalc_bg_alpha = (255 * (255 - bg[3])) / 255;
 231
 232     for (int i = 0; i < 3; i++) {
 233         base[i] = precalc_bg_alpha + (bg[i] * bg[3]) / 255;
 234         base[i] = (base[i] * (255 - orig[3])) / 255 + (orig[i] * orig[3]) / 255;
 235     }
 236 }
 237
 238 inline unsigned char * get_pixel(guchar *px, int x, int y, int width) {
 239     return px + (x + y * width) * 4;
 240 }
 241
 242 GList * flood_channels_dropdown_items_list() {
 243     GList *glist = NULL;
 244
 245     glist = g_list_append (glist, _("Visible Colors"));
 246     glist = g_list_append (glist, _("Red"));
 247     glist = g_list_append (glist, _("Green"));
 248     glist = g_list_append (glist, _("Blue"));
 249     glist = g_list_append (glist, _("Hue"));
 250     glist = g_list_append (glist, _("Saturation"));
 251     glist = g_list_append (glist, _("Lightness"));
 252     glist = g_list_append (glist, _("Alpha"));
 253
 254     return glist;
 255 }
 256
 257 GList * flood_autogap_dropdown_items_list() {
 258     GList *glist = NULL;
 259
 260     glist = g_list_append (glist, _("None"));
 261     glist = g_list_append (glist, _("Small"));
 262     glist = g_list_append (glist, _("Medium"));
 263     glist = g_list_append (glist, _("Large"));
 264
 265     return glist;
 266 }
 267
 268 static bool compare_pixels(unsigned char *check, unsigned char *orig, unsigned char *merged_orig_pixel, unsigned char *dtc, int threshold, PaintBucketChannels method) {
 269     int diff = 0;
 270     float hsl_check[3], hsl_orig[3];
 271
 272     if ((method == FLOOD_CHANNELS_H) ||
 273         (method == FLOOD_CHANNELS_S) ||
 274         (method == FLOOD_CHANNELS_L)) {
 275         sp_color_rgb_to_hsl_floatv(hsl_check, check[0] / 255.0, check[1] / 255.0, check[2] / 255.0);
 276         sp_color_rgb_to_hsl_floatv(hsl_orig, orig[0] / 255.0, orig[1] / 255.0, orig[2] / 255.0);
 277     }
 278
 279     switch (method) {
 280         case FLOOD_CHANNELS_ALPHA:
 281             return ((int)abs(check[3] - orig[3]) <= threshold);
 282         case FLOOD_CHANNELS_R:
 283             return ((int)abs(check[0] - orig[0]) <= threshold);
 284         case FLOOD_CHANNELS_G:
 285             return ((int)abs(check[1] - orig[1]) <= threshold);
 286         case FLOOD_CHANNELS_B:
 287             return ((int)abs(check[2] - orig[2]) <= threshold);
 288         case FLOOD_CHANNELS_RGB:
 289             unsigned char merged_check[3];
 290
 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_pixel[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 inline bool is_pixel_checked(unsigned char *t) { return t[0] == 1; }
 310 static inline bool is_pixel_queued(unsigned char *t) { return t[1] == 1; }
 311 static inline bool is_pixel_paintability_checked(unsigned char *t) { return t[2] != 0; }
 312 static inline bool is_pixel_paintable(unsigned char *t) { return t[2] == 1; }
 313 static inline bool is_pixel_colored(unsigned char *t) { return t[3] == 255; }
 314
 315 static inline void mark_pixel_checked(unsigned char *t) { t[0] = 1; }
 316 static inline void mark_pixel_queued(unsigned char *t) { t[1] = 1; }
 317 static inline void mark_pixel_paintable(unsigned char *t) { t[2] = 1; }
 318 static inline void mark_pixel_not_paintable(unsigned char *t) { t[2] = 2; }
 319 static inline void mark_pixel_colored(unsigned char *t) { t[3] = 255; }
 320
 321 static inline void clear_pixel_paintability(unsigned char *t) { t[2] = 0; }
 322
 323 struct bitmap_coords_info {
 324     bool is_left;
 325     int x;
 326     int y;
 327     int y_limit;
 328     int width;
 329     int height;
 330     int threshold;
 331     int radius;
 332     PaintBucketChannels method;
 333     unsigned char *dtc;
 334     unsigned char *merged_orig_pixel;
 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, unsigned char *trace_t, int x, int y, unsigned char *orig_color, bitmap_coords_info bci) {
 342     if (is_pixel_paintability_checked(trace_t)) {
 343         return is_pixel_paintable(trace_t);
 344     } else {
 345         unsigned char *t = get_pixel(px, x, y, bci.width);
 346         if (compare_pixels(t, orig_color, bci.merged_orig_pixel, bci.dtc, bci.threshold, bci.method)) {
 347             mark_pixel_paintable(trace_t);
 348             return true;
 349         } else {
 350             mark_pixel_not_paintable(trace_t);
 351             return false;
 352         }
 353     }
 354 }
 355
 356 static bool try_add_to_queue(std::deque<NR::Point> *fill_queue, guchar *px, guchar *trace_px, unsigned char *orig, int x, int y, bitmap_coords_info bci) {
 357     unsigned char *trace_t = get_pixel(trace_px, x, y, bci.width);
 358     bool ok_to_add = false;
 359     if (bci.radius == 0) {
 360         if (!(is_pixel_queued(trace_t) || is_pixel_colored(trace_t))) {
 361             ok_to_add = true;
 362         }
 363     } else {
 364         if (!(is_pixel_checked(trace_t) || is_pixel_queued(trace_t))) {
 365             ok_to_add = check_if_pixel_is_paintable(px, trace_t, x, y, orig, bci);
 366         }
 367     }
 368     if (ok_to_add) {
 369         if ((fill_queue->size() < bci.max_queue_size)) {
 370             fill_queue->push_back(NR::Point(x, y));
 371             mark_pixel_queued(trace_t);
 372             return true;
 373         }
 374
 375     }
 376     return false;
 377 }
 378
 379 static void do_trace(GdkPixbuf *px, SPDesktop *desktop, NR::Matrix transform, bool union_with_selection) {
 380     SPDocument *document = sp_desktop_document(desktop);
 381
 382     Inkscape::Trace::Potrace::PotraceTracingEngine pte;
 383
 384     pte.setTraceType(Inkscape::Trace::Potrace::TRACE_BRIGHTNESS);
 385     pte.setInvert(false);
 386
 387     Glib::RefPtr<Gdk::Pixbuf> pixbuf = Glib::wrap(px, true);
 388
 389     std::vector<Inkscape::Trace::TracingEngineResult> results = pte.trace(pixbuf);
 390
 391     Inkscape::XML::Node *layer_repr = SP_GROUP(desktop->currentLayer())->repr;
 392     Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
 393
 394     long totalNodeCount = 0L;
 395
 396     double offset = prefs_get_double_attribute("tools.paintbucket", "offset", 0.0);
 397
 398     for (unsigned int i=0 ; i<results.size() ; i++) {
 399         Inkscape::Trace::TracingEngineResult result = results[i];
 400         totalNodeCount += result.getNodeCount();
 401
 402         Inkscape::XML::Node *pathRepr = xml_doc->createElement("svg:path");
 403         /* Set style */
 404         sp_desktop_apply_style_tool (desktop, pathRepr, "tools.paintbucket", false);
 405
 406         NArtBpath *bpath = sp_svg_read_path(result.getPathData().c_str());
 407         Path *path = bpath_to_Path(bpath);
 408         g_free(bpath);
 409
 410         if (offset != 0) {
 411
 412             Shape *path_shape = new Shape();
 413
 414             path->ConvertWithBackData(0.03);
 415             path->Fill(path_shape, 0);
 416             delete path;
 417
 418             Shape *expanded_path_shape = new Shape();
 419
 420             expanded_path_shape->ConvertToShape(path_shape, fill_nonZero);
 421             path_shape->MakeOffset(expanded_path_shape, offset * desktop->current_zoom(), join_round, 4);
 422             expanded_path_shape->ConvertToShape(path_shape, fill_positive);
 423
 424             Path *expanded_path = new Path();
 425
 426             expanded_path->Reset();
 427             expanded_path_shape->ConvertToForme(expanded_path);
 428             expanded_path->ConvertEvenLines(1.0);
 429             expanded_path->Simplify(1.0);
 430
 431             delete path_shape;
 432             delete expanded_path_shape;
 433
 434             gchar *str = expanded_path->svg_dump_path();
 435             if (str && *str) {
 436                 pathRepr->setAttribute("d", str);
 437                 g_free(str);
 438             } else {
 439                 desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("<b>Too much inset</b>, the result is empty."));
 440                 Inkscape::GC::release(pathRepr);
 441                 g_free(str);
 442                 return;
 443             }
 444
 445             delete expanded_path;
 446
 447         } else {
 448             gchar *str = path->svg_dump_path();
 449             delete path;
 450             pathRepr->setAttribute("d", str);
 451             g_free(str);
 452         }
 453
 454         layer_repr->addChild(pathRepr, NULL);
 455
 456         SPObject *reprobj = document->getObjectByRepr(pathRepr);
 457         if (reprobj) {
 458             sp_item_write_transform(SP_ITEM(reprobj), pathRepr, transform, NULL);
 459
 460             // premultiply the item transform by the accumulated parent transform in the paste layer
 461             NR::Matrix local = sp_item_i2doc_affine(SP_GROUP(desktop->currentLayer()));
 462             if (!local.test_identity()) {
 463                 gchar const *t_str = pathRepr->attribute("transform");
 464                 NR::Matrix item_t (NR::identity());
 465                 if (t_str)
 466                     sp_svg_transform_read(t_str, &item_t);
 467                 item_t *= local.inverse();
 468                 // (we're dealing with unattached repr, so we write to its attr instead of using sp_item_set_transform)
 469                 gchar *affinestr=sp_svg_transform_write(item_t);
 470                 pathRepr->setAttribute("transform", affinestr);
 471                 g_free(affinestr);
 472             }
 473
 474             Inkscape::Selection *selection = sp_desktop_selection(desktop);
 475
 476             pathRepr->setPosition(-1);
 477
 478             if (union_with_selection) {
 479                 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)));
 480                 selection->add(reprobj);
 481                 sp_selected_path_union_skip_undo();
 482             } else {
 483                 desktop->messageStack()->flashF(Inkscape::WARNING_MESSAGE, _("Area filled, path with <b>%d</b> nodes created."), sp_nodes_in_path(SP_PATH(reprobj)));
 484                 selection->set(reprobj);
 485             }
 486
 487         }
 488
 489         Inkscape::GC::release(pathRepr);
 490
 491     }
 492 }
 493
 494 enum ScanlineCheckResult {
 495     SCANLINE_CHECK_OK,
 496     SCANLINE_CHECK_ABORTED,
 497     SCANLINE_CHECK_BOUNDARY
 498 };
 499
 500 static bool coords_in_range(int x, int y, bitmap_coords_info bci) {
 501     return (x >= 0)
 502           && (x < bci.width)
 503           && (y >= 0)
 504           && (y < bci.height);
 505 }
 506
 507 #define PAINT_DIRECTION_LEFT 1
 508 #define PAINT_DIRECTION_RIGHT 2
 509 #define PAINT_DIRECTION_UP 4
 510 #define PAINT_DIRECTION_DOWN 8
 511 #define PAINT_DIRECTION_ALL 15
 512
 513 static unsigned int paint_pixel(guchar *px, guchar *trace_px, unsigned char *orig_color, bitmap_coords_info bci, unsigned char *original_point_trace_t) {
 514     if (bci.radius == 0) {
 515         mark_pixel_colored(original_point_trace_t);
 516         return PAINT_DIRECTION_ALL;
 517     } else {
 518         unsigned char *trace_t;
 519
 520         bool can_paint_up = true;
 521         bool can_paint_down = true;
 522         bool can_paint_left = true;
 523         bool can_paint_right = true;
 524
 525         for (int y = -bci.radius; y <= bci.radius; y++) {
 526             int ty = bci.y + y;
 527             for (int x = -bci.radius; x <= bci.radius; x++) {
 528                 int tx = bci.x + x;
 529
 530                 if (coords_in_range(tx, ty, bci)) {
 531                     trace_t = get_pixel(trace_px, tx, ty, bci.width);
 532                     if (!is_pixel_colored(trace_t)) {
 533                         if (check_if_pixel_is_paintable(px, trace_t, tx, ty, orig_color, bci)) {
 534                             mark_pixel_colored(trace_t);
 535                         } else {
 536                             if (x < 0) { can_paint_left = false; }
 537                             if (x > 0) { can_paint_right = false; }
 538                             if (y < 0) { can_paint_up = false; }
 539                             if (y > 0) { can_paint_down = false; }
 540                         }
 541                     }
 542                 }
 543             }
 544         }
 545
 546         unsigned int paint_directions = 0;
 547         if (can_paint_left) { paint_directions += PAINT_DIRECTION_LEFT; }
 548         if (can_paint_right) { paint_directions += PAINT_DIRECTION_RIGHT; }
 549         if (can_paint_up) { paint_directions += PAINT_DIRECTION_UP; }
 550         if (can_paint_down) { paint_directions += PAINT_DIRECTION_DOWN; }
 551
 552         return paint_directions;
 553     }
 554 }
 555
 556 static unsigned int paint_leading_edge(guchar *px, guchar *trace_px, unsigned char *orig_color, bitmap_coords_info bci, unsigned int direction) {
 557     unsigned char *trace_t;
 558
 559     if (bci.radius > 0) {
 560         bool can_paint_up = true;
 561         bool can_paint_down = true;
 562         bool can_paint_left = true;
 563         bool can_paint_right = true;
 564
 565         int tx = bci.x;
 566
 567         switch (direction) {
 568           case PAINT_DIRECTION_LEFT:
 569             tx = bci.x - bci.radius;
 570             break;
 571           case PAINT_DIRECTION_RIGHT:
 572             tx = bci.x + bci.radius;
 573             break;
 574         }
 575
 576         for (int y = -bci.radius; y <= bci.radius; y++) {
 577             int ty = bci.y + y;
 578             if (coords_in_range(tx, ty, bci)) {
 579                 trace_t = get_pixel(trace_px, tx, ty, bci.width);
 580                 if (!is_pixel_colored(trace_t)) {
 581                     if (check_if_pixel_is_paintable(px, trace_t, tx, ty, orig_color, bci)) {
 582                         mark_pixel_colored(trace_t);
 583                     } else {
 584                         if (direction == PAINT_DIRECTION_LEFT) { can_paint_left = false; }
 585                         if (direction == PAINT_DIRECTION_RIGHT) { can_paint_right = false; }
 586                         if (y < 0) { can_paint_up = false; }
 587                         if (y > 0) { can_paint_down = false; }
 588                     }
 589                 }
 590             }
 591         }
 592
 593         unsigned int paint_directions = 0;
 594         if (can_paint_left) { paint_directions += PAINT_DIRECTION_LEFT; }
 595         if (can_paint_right) { paint_directions += PAINT_DIRECTION_RIGHT; }
 596         if (can_paint_up) { paint_directions += PAINT_DIRECTION_UP; }
 597         if (can_paint_down) { paint_directions += PAINT_DIRECTION_DOWN; }
 598
 599         return paint_directions;
 600     } else {
 601         return 0;
 602     }
 603 }
 604
 605 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) {
 606     bool aborted = false;
 607     bool reached_screen_boundary = false;
 608     bool ok;
 609
 610     bool keep_tracing;
 611     bool paint_single_pixel = true;
 612     bool leading_edge_after_first_paint = (bci.radius == 0);
 613
 614     int vertical_check_count = 0;
 615
 616     unsigned char *current_trace_t = get_pixel(trace_px, bci.x, bci.y, bci.width);
 617     unsigned int paint_directions;
 618
 619     do {
 620         ok = false;
 621         if (bci.is_left) {
 622             keep_tracing = (bci.x >= 0);
 623         } else {
 624             keep_tracing = (bci.x < bci.width);
 625         }
 626
 627         if (keep_tracing) {
 628             if (check_if_pixel_is_paintable(px, current_trace_t, bci.x, bci.y, orig_color, bci)) {
 629                 if (paint_single_pixel) {
 630                     paint_directions = paint_pixel(px, trace_px, orig_color, bci, current_trace_t);
 631                 } else {
 632                     if (bci.is_left) {
 633                         paint_directions = paint_leading_edge(px, trace_px, orig_color, bci, PAINT_DIRECTION_LEFT);
 634                     } else {
 635                         paint_directions = paint_leading_edge(px, trace_px, orig_color, bci, PAINT_DIRECTION_RIGHT);
 636                     }
 637                 }
 638                 paint_single_pixel = leading_edge_after_first_paint;
 639
 640                 if (vertical_check_count == 0) {
 641                     if (paint_directions & PAINT_DIRECTION_UP) {
 642                         try_add_to_queue(fill_queue, px, trace_px, orig_color, bci.x, bci.y - 1, bci);
 643                     }
 644                     if (paint_directions & PAINT_DIRECTION_DOWN) {
 645                         try_add_to_queue(fill_queue, px, trace_px, orig_color, bci.x, bci.y + 1,  bci);
 646                     }
 647                 }
 648
 649                 if (bci.max_vertical_check > 0) {
 650                     vertical_check_count = (vertical_check_count + 1) % bci.max_vertical_check;
 651                 }
 652
 653                 if (bci.is_left) {
 654                     if (paint_directions & PAINT_DIRECTION_LEFT) {
 655                         bci.x -= 1; current_trace_t -= 4;
 656                         ok = true;
 657                     }
 658                 } else {
 659                     if (paint_directions & PAINT_DIRECTION_RIGHT) {
 660                         bci.x += 1; current_trace_t += 4;
 661                         ok = true;
 662                     }
 663                 }
 664             }
 665         } else {
 666             if (bci.bbox.min()[NR::X] > bci.screen.min()[NR::X]) {
 667                 aborted = true; break;
 668             } else {
 669                 reached_screen_boundary = true;
 670             }
 671         }
 672     } while (ok);
 673
 674     if (aborted) { return SCANLINE_CHECK_ABORTED; }
 675     if (reached_screen_boundary) { return SCANLINE_CHECK_BOUNDARY; }
 676     return SCANLINE_CHECK_OK;
 677 }
 678
 679 static void sp_flood_do_flood_fill(SPEventContext *event_context, GdkEvent *event, bool union_with_selection, bool is_point_fill, bool is_touch_fill) {
 680     SPDesktop *desktop = event_context->desktop;
 681     SPDocument *document = sp_desktop_document(desktop);
 682
 683     /* Create new arena */
 684     NRArena *arena = NRArena::create();
 685     unsigned dkey = sp_item_display_key_new(1);
 686
 687     sp_document_ensure_up_to_date (document);
 688
 689     SPItem *document_root = SP_ITEM(SP_DOCUMENT_ROOT(document));
 690     NR::Maybe<NR::Rect> bbox = document_root->getBounds(NR::identity());
 691
 692     if (!bbox) {
 693         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("<b>Area is not bounded</b>, cannot fill."));
 694         return;
 695     }
 696
 697     double zoom_scale = desktop->current_zoom();
 698     double padding = 1.6;
 699
 700     NR::Rect screen = desktop->get_display_area();
 701
 702     int width = (int)ceil(screen.extent(NR::X) * zoom_scale * padding);
 703     int height = (int)ceil(screen.extent(NR::Y) * zoom_scale * padding);
 704
 705     NR::Point origin(screen.min()[NR::X],
 706                      sp_document_height(document) - screen.extent(NR::Y) - screen.min()[NR::Y]);
 707
 708     origin[NR::X] = origin[NR::X] + (screen.extent(NR::X) * ((1 - padding) / 2));
 709     origin[NR::Y] = origin[NR::Y] + (screen.extent(NR::Y) * ((1 - padding) / 2));
 710
 711     NR::scale scale(zoom_scale, zoom_scale);
 712     NR::Matrix affine = scale * NR::translate(-origin * scale);
 713
 714     /* Create ArenaItems and set transform */
 715     NRArenaItem *root = sp_item_invoke_show(SP_ITEM(sp_document_root(document)), arena, dkey, SP_ITEM_SHOW_DISPLAY);
 716     nr_arena_item_set_transform(NR_ARENA_ITEM(root), affine);
 717
 718     NRGC gc(NULL);
 719     nr_matrix_set_identity(&gc.transform);
 720
 721     NRRectL final_bbox;
 722     final_bbox.x0 = 0;
 723     final_bbox.y0 = 0;//row;
 724     final_bbox.x1 = width;
 725     final_bbox.y1 = height;//row + num_rows;
 726
 727     nr_arena_item_invoke_update(root, &final_bbox, &gc, NR_ARENA_ITEM_STATE_ALL, NR_ARENA_ITEM_STATE_NONE);
 728
 729     guchar *px = g_new(guchar, 4 * width * height);
 730
 731     NRPixBlock B;
 732     nr_pixblock_setup_extern( &B, NR_PIXBLOCK_MODE_R8G8B8A8N,
 733                               final_bbox.x0, final_bbox.y0, final_bbox.x1, final_bbox.y1,
 734                               px, 4 * width, FALSE, FALSE );
 735
 736     SPNamedView *nv = sp_desktop_namedview(desktop);
 737     unsigned long bgcolor = nv->pagecolor;
 738
 739     unsigned char dtc[4];
 740     dtc[0] = NR_RGBA32_R(bgcolor);
 741     dtc[1] = NR_RGBA32_G(bgcolor);
 742     dtc[2] = NR_RGBA32_B(bgcolor);
 743     dtc[3] = NR_RGBA32_A(bgcolor);
 744
 745     for (int fy = 0; fy < height; fy++) {
 746         guchar *p = NR_PIXBLOCK_PX(&B) + fy * B.rs;
 747         for (int fx = 0; fx < width; fx++) {
 748             for (int i = 0; i < 4; i++) {
 749                 *p++ = dtc[i];
 750             }
 751         }
 752     }
 753
 754     nr_arena_item_invoke_render(NULL, root, &final_bbox, &B, NR_ARENA_ITEM_RENDER_NO_CACHE );
 755     nr_pixblock_release(&B);
 756
 757     // Hide items
 758     sp_item_invoke_hide(SP_ITEM(sp_document_root(document)), dkey);
 759
 760     nr_arena_item_unref(root);
 761     nr_object_unref((NRObject *) arena);
 762
 763     guchar *trace_px = g_new(guchar, 4 * width * height);
 764     memset(trace_px, 0x00, 4 * width * height);
 765
 766     std::deque<NR::Point> fill_queue;
 767     std::queue<NR::Point> color_queue;
 768
 769     std::vector<NR::Point> fill_points;
 770
 771     if (is_point_fill) {
 772         fill_points.push_back(NR::Point(event->button.x, event->button.y));
 773     } else {
 774         Inkscape::Rubberband::Rubberband *r = Inkscape::Rubberband::get();
 775         fill_points = r->getPoints();
 776     }
 777
 778     for (unsigned int i = 0; i < fill_points.size(); i++) {
 779         NR::Point pw = NR::Point(fill_points[i][NR::X] / zoom_scale, sp_document_height(document) + (fill_points[i][NR::Y] / zoom_scale)) * affine;
 780
 781         pw[NR::X] = (int)MIN(width - 1, MAX(0, pw[NR::X]));
 782         pw[NR::Y] = (int)MIN(height - 1, MAX(0, pw[NR::Y]));
 783
 784         if (is_touch_fill) {
 785             if (i == 0) {
 786                 color_queue.push(pw);
 787             } else {
 788                 fill_queue.push_back(pw);
 789             }
 790         } else {
 791             color_queue.push(pw);
 792         }
 793     }
 794
 795     bool aborted = false;
 796     int y_limit = height - 1;
 797
 798     PaintBucketChannels method = (PaintBucketChannels)prefs_get_int_attribute("tools.paintbucket", "channels", 0);
 799     int threshold = prefs_get_int_attribute_limited("tools.paintbucket", "threshold", 1, 0, 100);
 800
 801     switch(method) {
 802         case FLOOD_CHANNELS_ALPHA:
 803         case FLOOD_CHANNELS_RGB:
 804         case FLOOD_CHANNELS_R:
 805         case FLOOD_CHANNELS_G:
 806         case FLOOD_CHANNELS_B:
 807             threshold = (255 * threshold) / 100;
 808             break;
 809         case FLOOD_CHANNELS_H:
 810         case FLOOD_CHANNELS_S:
 811         case FLOOD_CHANNELS_L:
 812             break;
 813       }
 814
 815     bool reached_screen_boundary = false;
 816
 817     bitmap_coords_info bci;
 818
 819     bci.y_limit = y_limit;
 820     bci.width = width;
 821     bci.height = height;
 822     bci.threshold = threshold;
 823     bci.method = method;
 824     bci.bbox = *bbox;
 825     bci.screen = screen;
 826     bci.dtc = dtc;
 827     bci.radius = prefs_get_int_attribute_limited("tools.paintbucket", "autogap", 0, 0, 3);
 828     bci.max_queue_size = width * height;
 829     bci.max_vertical_check = prefs_get_int_attribute_limited("tools.paintbucket", "fillaccuracy", 0, 0, 5);
 830
 831     bool first_run = true;
 832
 833 //     Time values to measure each buffer's paint time
 834 //     GTimeVal tstart, tfinish;
 835
 836 //     g_get_current_time (&tstart);
 837
 838     while (!color_queue.empty() && !aborted) {
 839         NR::Point color_point = color_queue.front();
 840         color_queue.pop();
 841
 842         unsigned char *orig_px = get_pixel(px, (int)color_point[NR::X], (int)color_point[NR::Y], width);
 843         unsigned char orig_color[4];
 844         for (int i = 0; i < 4; i++) { orig_color[i] = orig_px[i]; }
 845
 846         unsigned char merged_orig[3];
 847
 848         merge_pixel_with_background(orig_color, dtc, merged_orig);
 849
 850         bci.merged_orig_pixel = merged_orig;
 851
 852         unsigned char *trace_t = get_pixel(trace_px, (int)color_point[NR::X], (int)color_point[NR::Y], width);
 853         if (!is_pixel_checked(trace_t) && !is_pixel_colored(trace_t)) {
 854             if (check_if_pixel_is_paintable(px, trace_px, (int)color_point[NR::X], (int)color_point[NR::Y], orig_color, bci)) {
 855                 fill_queue.push_front(color_point);
 856
 857                 if (!first_run) {
 858                     for (int y = 0; y < height; y++) {
 859                         for (int x = 0; x < width; x++) {
 860                             trace_t = get_pixel(trace_px, x, y, width);
 861                             clear_pixel_paintability(trace_t);
 862                         }
 863                     }
 864                 }
 865                 first_run = false;
 866             }
 867         }
 868
 869         while (!fill_queue.empty() && !aborted) {
 870             NR::Point cp = fill_queue.front();
 871             fill_queue.pop_front();
 872
 873             unsigned char *trace_t = get_pixel(trace_px, (int)cp[NR::X], (int)cp[NR::Y], width);
 874             if (!is_pixel_checked(trace_t)) {
 875                 mark_pixel_checked(trace_t);
 876
 877                 int x = (int)cp[NR::X];
 878                 int y = (int)cp[NR::Y];
 879
 880                 if (y == 0) {
 881                     if (bbox->min()[NR::Y] > screen.min()[NR::Y]) {
 882                         aborted = true; break;
 883                     } else {
 884                         reached_screen_boundary = true;
 885                     }
 886                 }
 887
 888                 if (y == y_limit) {
 889                     if (bbox->max()[NR::Y] < screen.max()[NR::Y]) {
 890                         aborted = true; break;
 891                     } else {
 892                         reached_screen_boundary = true;
 893                     }
 894                 }
 895
 896                 bci.is_left = true;
 897                 bci.x = x;
 898                 bci.y = y;
 899
 900                 ScanlineCheckResult result = perform_bitmap_scanline_check(&fill_queue, px, trace_px, orig_color, bci);
 901
 902                 switch (result) {
 903                     case SCANLINE_CHECK_ABORTED:
 904                         aborted = true;
 905                         break;
 906                     case SCANLINE_CHECK_BOUNDARY:
 907                         reached_screen_boundary = true;
 908                         break;
 909                     default:
 910                         break;
 911                 }
 912
 913                 bci.is_left = false;
 914                 bci.x = x + 1;
 915
 916                 result = perform_bitmap_scanline_check(&fill_queue, px, trace_px, orig_color, bci);
 917
 918                 switch (result) {
 919                     case SCANLINE_CHECK_ABORTED:
 920                         aborted = true;
 921                         break;
 922                     case SCANLINE_CHECK_BOUNDARY:
 923                         reached_screen_boundary = true;
 924                         break;
 925                     default:
 926                         break;
 927                 }
 928             }
 929         }
 930     }
 931
 932 //     g_get_current_time (&tfinish);
 933
 934 //     Remember the slowest_buffer of this paint.
 935 //     glong this_buffer = (tfinish.tv_sec - tstart.tv_sec) * 1000000 + (tfinish.tv_usec - tstart.tv_usec);
 936
 937 //     g_message("time: %ld", this_buffer);
 938
 939     g_free(px);
 940
 941     if (aborted) {
 942         g_free(trace_px);
 943         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("<b>Area is not bounded</b>, cannot fill."));
 944         return;
 945     }
 946
 947     if (reached_screen_boundary) {
 948         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."));
 949     }
 950
 951     GdkPixbuf* pixbuf = gdk_pixbuf_new_from_data(trace_px,
 952                                       GDK_COLORSPACE_RGB,
 953                                       TRUE,
 954                                       8, width, height, width * 4,
 955                                       (GdkPixbufDestroyNotify)g_free,
 956                                       NULL);
 957
 958     NR::Matrix inverted_affine = NR::Matrix(affine).inverse();
 959
 960     do_trace(pixbuf, desktop, inverted_affine, union_with_selection);
 961
 962     g_free(trace_px);
 963
 964     sp_document_done(document, SP_VERB_CONTEXT_PAINTBUCKET, _("Fill bounded area"));
 965 }
 966
 967 static gint sp_flood_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event)
 968 {
 969     gint ret = FALSE;
 970
 971     SPDesktop *desktop = event_context->desktop;
 972
 973     switch (event->type) {
 974     case GDK_BUTTON_PRESS:
 975         if (event->button.state & GDK_CONTROL_MASK) {
 976             NR::Point const button_w(event->button.x,
 977                                     event->button.y);
 978
 979             SPItem *item = sp_event_context_find_item (desktop, button_w, TRUE, TRUE);
 980
 981             Inkscape::XML::Node *pathRepr = SP_OBJECT_REPR(item);
 982             /* Set style */
 983             sp_desktop_apply_style_tool (desktop, pathRepr, "tools.paintbucket", false);
 984             sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_PAINTBUCKET, _("Set style on object"));
 985             ret = TRUE;
 986         }
 987         break;
 988     default:
 989         break;
 990     }
 991
 992     if (((SPEventContextClass *) parent_class)->item_handler) {
 993         ret = ((SPEventContextClass *) parent_class)->item_handler(event_context, item, event);
 994     }
 995
 996     return ret;
 997 }
 998
 999 static gint sp_flood_context_root_handler(SPEventContext *event_context, GdkEvent *event)
1000 {
1001     static bool dragging;
1002
1003     gint ret = FALSE;
1004     SPDesktop *desktop = event_context->desktop;
1005
1006     switch (event->type) {
1007     case GDK_BUTTON_PRESS:
1008         if ( event->button.button == 1 ) {
1009             if (!(event->button.state & GDK_CONTROL_MASK)) {
1010                 NR::Point const button_w(event->button.x,
1011                                         event->button.y);
1012
1013                 if (Inkscape::have_viable_layer(desktop, event_context->defaultMessageContext())) {
1014                     // save drag origin
1015                     event_context->xp = (gint) button_w[NR::X];
1016                     event_context->yp = (gint) button_w[NR::Y];
1017                     event_context->within_tolerance = true;
1018
1019                     dragging = true;
1020
1021                     NR::Point const p(desktop->w2d(button_w));
1022                     Inkscape::Rubberband::get()->setMode(RUBBERBAND_MODE_TOUCHPATH);
1023                     Inkscape::Rubberband::get()->start(desktop, p);
1024                 }
1025             }
1026         }
1027     case GDK_MOTION_NOTIFY:
1028         if ( dragging
1029              && ( event->motion.state & GDK_BUTTON1_MASK ) )
1030         {
1031             if ( event_context->within_tolerance
1032                  && ( abs( (gint) event->motion.x - event_context->xp ) < event_context->tolerance )
1033                  && ( abs( (gint) event->motion.y - event_context->yp ) < event_context->tolerance ) ) {
1034                 break; // do not drag if we're within tolerance from origin
1035             }
1036
1037             event_context->within_tolerance = false;
1038
1039             NR::Point const motion_pt(event->motion.x, event->motion.y);
1040             NR::Point const p(desktop->w2d(motion_pt));
1041             if (Inkscape::Rubberband::get()->is_started()) {
1042                 Inkscape::Rubberband::get()->move(p);
1043                 event_context->defaultMessageContext()->set(Inkscape::NORMAL_MESSAGE, _("<b>Draw over</b> areas to add to fill, hold <b>Alt</b> for touch fill"));
1044                 gobble_motion_events(GDK_BUTTON1_MASK);
1045             }
1046         }
1047         break;
1048
1049     case GDK_BUTTON_RELEASE:
1050         if ( event->button.button == 1 ) {
1051             Inkscape::Rubberband::Rubberband *r = Inkscape::Rubberband::get();
1052             if (r->is_started()) {
1053                 // set "busy" cursor
1054                 desktop->setWaitingCursor();
1055
1056                 if (SP_IS_EVENT_CONTEXT(event_context)) {
1057                     // Since setWaitingCursor runs main loop iterations, we may have already left this tool!
1058                     // So check if the tool is valid before doing anything
1059                     dragging = false;
1060
1061                     bool is_point_fill = event_context->within_tolerance;
1062                     bool is_touch_fill = event->button.state & GDK_MOD1_MASK;
1063
1064                     sp_flood_do_flood_fill(event_context, event, event->button.state & GDK_SHIFT_MASK, is_point_fill, is_touch_fill);
1065
1066                     desktop->clearWaitingCursor();
1067                     // restore cursor when done; note that it may already be different if e.g. user
1068                     // switched to another tool during interruptible tracing or drawing, in which case do nothing
1069
1070                     ret = TRUE;
1071                 }
1072
1073                 r->stop();
1074                 event_context->defaultMessageContext()->clear();
1075             }
1076         }
1077         break;
1078     case GDK_KEY_PRESS:
1079         switch (get_group0_keyval (&event->key)) {
1080         case GDK_Up:
1081         case GDK_Down:
1082         case GDK_KP_Up:
1083         case GDK_KP_Down:
1084             // prevent the zoom field from activation
1085             if (!MOD__CTRL_ONLY)
1086                 ret = TRUE;
1087             break;
1088         default:
1089             break;
1090         }
1091         break;
1092     default:
1093         break;
1094     }
1095
1096     if (!ret) {
1097         if (((SPEventContextClass *) parent_class)->root_handler) {
1098             ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
1099         }
1100     }
1101
1102     return ret;
1103 }
1104
1105
1106 static void sp_flood_finish(SPFloodContext *rc)
1107 {
1108     rc->_message_context->clear();
1109
1110     if ( rc->item != NULL ) {
1111         SPDesktop * desktop;
1112
1113         desktop = SP_EVENT_CONTEXT_DESKTOP(rc);
1114
1115         SP_OBJECT(rc->item)->updateRepr();
1116
1117         sp_canvas_end_forced_full_redraws(desktop->canvas);
1118
1119         sp_desktop_selection(desktop)->set(rc->item);
1120         sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_PAINTBUCKET,
1121                         _("Fill bounded area"));
1122
1123         rc->item = NULL;
1124     }
1125 }
1126
1127 void flood_channels_set_channels( gint channels )
1128 {
1129     prefs_set_int_attribute("tools.paintbucket", "channels", channels);
1130 }
1131
1132 /*
1133   Local Variables:
1134   mode:c++
1135   c-file-style:"stroustrup"
1136   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1137   indent-tabs-mode:nil
1138   fill-column:99
1139   End:
1140 */
1141 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :