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 inline 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_unchecked(unsigned char *t) { t[0] = 0; }
 317 static inline void mark_pixel_queued(unsigned char *t) { t[1] = 1; }
 318 static inline void mark_pixel_paintable(unsigned char *t) { t[2] = 1; }
 319 static inline void mark_pixel_not_paintable(unsigned char *t) { t[2] = 2; }
 320 static inline void mark_pixel_colored(unsigned char *t) { t[3] = 255; }
 321
 322 static inline void clear_pixel_paintability(unsigned char *t) { t[2] = 0; }
 323
 324 struct bitmap_coords_info {
 325     bool is_left;
 326     unsigned int x;
 327     unsigned int y;
 328     int y_limit;
 329     unsigned int width;
 330     unsigned int height;
 331     unsigned int threshold;
 332     unsigned int radius;
 333     PaintBucketChannels method;
 334     unsigned char *dtc;
 335     unsigned char *merged_orig_pixel;
 336     NR::Rect bbox;
 337     NR::Rect screen;
 338     unsigned int max_queue_size;
 339     unsigned int current_step;
 340 };
 341
 342 inline 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) {
 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.merged_orig_pixel, 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 void do_trace(GdkPixbuf *px, SPDesktop *desktop, NR::Matrix transform, bool union_with_selection) {
 358     SPDocument *document = sp_desktop_document(desktop);
 359
 360     Inkscape::Trace::Potrace::PotraceTracingEngine pte;
 361
 362     pte.setTraceType(Inkscape::Trace::Potrace::TRACE_BRIGHTNESS);
 363     pte.setInvert(false);
 364
 365     Glib::RefPtr<Gdk::Pixbuf> pixbuf = Glib::wrap(px, true);
 366
 367     std::vector<Inkscape::Trace::TracingEngineResult> results = pte.trace(pixbuf);
 368
 369     Inkscape::XML::Node *layer_repr = SP_GROUP(desktop->currentLayer())->repr;
 370     Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
 371
 372     long totalNodeCount = 0L;
 373
 374     double offset = prefs_get_double_attribute("tools.paintbucket", "offset", 0.0);
 375
 376     for (unsigned int i=0 ; i<results.size() ; i++) {
 377         Inkscape::Trace::TracingEngineResult result = results[i];
 378         totalNodeCount += result.getNodeCount();
 379
 380         Inkscape::XML::Node *pathRepr = xml_doc->createElement("svg:path");
 381         /* Set style */
 382         sp_desktop_apply_style_tool (desktop, pathRepr, "tools.paintbucket", false);
 383
 384         NArtBpath *bpath = sp_svg_read_path(result.getPathData().c_str());
 385         Path *path = bpath_to_Path(bpath);
 386         g_free(bpath);
 387
 388         if (offset != 0) {
 389
 390             Shape *path_shape = new Shape();
 391
 392             path->ConvertWithBackData(0.03);
 393             path->Fill(path_shape, 0);
 394             delete path;
 395
 396             Shape *expanded_path_shape = new Shape();
 397
 398             expanded_path_shape->ConvertToShape(path_shape, fill_nonZero);
 399             path_shape->MakeOffset(expanded_path_shape, offset * desktop->current_zoom(), join_round, 4);
 400             expanded_path_shape->ConvertToShape(path_shape, fill_positive);
 401
 402             Path *expanded_path = new Path();
 403
 404             expanded_path->Reset();
 405             expanded_path_shape->ConvertToForme(expanded_path);
 406             expanded_path->ConvertEvenLines(1.0);
 407             expanded_path->Simplify(1.0);
 408
 409             delete path_shape;
 410             delete expanded_path_shape;
 411
 412             gchar *str = expanded_path->svg_dump_path();
 413             if (str && *str) {
 414                 pathRepr->setAttribute("d", str);
 415                 g_free(str);
 416             } else {
 417                 desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("<b>Too much inset</b>, the result is empty."));
 418                 Inkscape::GC::release(pathRepr);
 419                 g_free(str);
 420                 return;
 421             }
 422
 423             delete expanded_path;
 424
 425         } else {
 426             gchar *str = path->svg_dump_path();
 427             delete path;
 428             pathRepr->setAttribute("d", str);
 429             g_free(str);
 430         }
 431
 432         layer_repr->addChild(pathRepr, NULL);
 433
 434         SPObject *reprobj = document->getObjectByRepr(pathRepr);
 435         if (reprobj) {
 436             sp_item_write_transform(SP_ITEM(reprobj), pathRepr, transform, NULL);
 437
 438             // premultiply the item transform by the accumulated parent transform in the paste layer
 439             NR::Matrix local = sp_item_i2doc_affine(SP_GROUP(desktop->currentLayer()));
 440             if (!local.test_identity()) {
 441                 gchar const *t_str = pathRepr->attribute("transform");
 442                 NR::Matrix item_t (NR::identity());
 443                 if (t_str)
 444                     sp_svg_transform_read(t_str, &item_t);
 445                 item_t *= local.inverse();
 446                 // (we're dealing with unattached repr, so we write to its attr instead of using sp_item_set_transform)
 447                 gchar *affinestr=sp_svg_transform_write(item_t);
 448                 pathRepr->setAttribute("transform", affinestr);
 449                 g_free(affinestr);
 450             }
 451
 452             Inkscape::Selection *selection = sp_desktop_selection(desktop);
 453
 454             pathRepr->setPosition(-1);
 455
 456             if (union_with_selection) {
 457                 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)));
 458                 selection->add(reprobj);
 459                 sp_selected_path_union_skip_undo();
 460             } else {
 461                 desktop->messageStack()->flashF(Inkscape::WARNING_MESSAGE, _("Area filled, path with <b>%d</b> nodes created."), sp_nodes_in_path(SP_PATH(reprobj)));
 462                 selection->set(reprobj);
 463             }
 464
 465         }
 466
 467         Inkscape::GC::release(pathRepr);
 468
 469     }
 470 }
 471
 472 enum ScanlineCheckResult {
 473     SCANLINE_CHECK_OK,
 474     SCANLINE_CHECK_ABORTED,
 475     SCANLINE_CHECK_BOUNDARY
 476 };
 477
 478 inline static bool coords_in_range(unsigned int x, unsigned int y, bitmap_coords_info bci) {
 479     return (x < bci.width) &&
 480            (y < bci.height);
 481 }
 482
 483 #define PAINT_DIRECTION_LEFT 1
 484 #define PAINT_DIRECTION_RIGHT 2
 485 #define PAINT_DIRECTION_UP 4
 486 #define PAINT_DIRECTION_DOWN 8
 487 #define PAINT_DIRECTION_ALL 15
 488
 489 inline static unsigned int paint_pixel(guchar *px, guchar *trace_px, unsigned char *orig_color, bitmap_coords_info bci, unsigned char *original_point_trace_t) {
 490     if (bci.radius == 0) {
 491         mark_pixel_colored(original_point_trace_t);
 492         return PAINT_DIRECTION_ALL;
 493     } else {
 494         unsigned char *trace_t;
 495
 496         bool can_paint_up = true;
 497         bool can_paint_down = true;
 498         bool can_paint_left = true;
 499         bool can_paint_right = true;
 500
 501         for (unsigned int ty = bci.y - bci.radius; ty <= bci.y + bci.radius; ty++) {
 502             for (unsigned int tx = bci.x - bci.radius; tx <= bci.x + bci.radius; tx++) {
 503                 if (coords_in_range(tx, ty, bci)) {
 504                     trace_t = get_pixel(trace_px, tx, ty, bci.width);
 505                     if (!is_pixel_colored(trace_t)) {
 506                         if (check_if_pixel_is_paintable(px, trace_t, tx, ty, orig_color, bci)) {
 507                             mark_pixel_colored(trace_t);
 508                         } else {
 509                             if (tx < bci.x) { can_paint_left = false; }
 510                             if (tx > bci.x) { can_paint_right = false; }
 511                             if (ty < bci.y) { can_paint_up = false; }
 512                             if (ty > bci.y) { can_paint_down = false; }
 513                         }
 514                     }
 515                 }
 516             }
 517         }
 518
 519         unsigned int paint_directions = 0;
 520         if (can_paint_left) { paint_directions += PAINT_DIRECTION_LEFT; }
 521         if (can_paint_right) { paint_directions += PAINT_DIRECTION_RIGHT; }
 522         if (can_paint_up) { paint_directions += PAINT_DIRECTION_UP; }
 523         if (can_paint_down) { paint_directions += PAINT_DIRECTION_DOWN; }
 524
 525         return paint_directions;
 526     }
 527 }
 528
 529 static void push_point_onto_queue(std::deque<NR::Point> *fill_queue, unsigned int max_queue_size, unsigned char *trace_t, unsigned int x, unsigned int y) {
 530     if (!is_pixel_queued(trace_t)) {
 531         if ((fill_queue->size() < max_queue_size)) {
 532             fill_queue->push_back(NR::Point(x, y));
 533             mark_pixel_queued(trace_t);
 534         }
 535     }
 536 }
 537
 538 static void shift_point_onto_queue(std::deque<NR::Point> *fill_queue, unsigned int max_queue_size, unsigned char *trace_t, unsigned int x, unsigned int y) {
 539     if (!is_pixel_queued(trace_t)) {
 540         if ((fill_queue->size() < max_queue_size)) {
 541             fill_queue->push_front(NR::Point(x, y));
 542             mark_pixel_queued(trace_t);
 543         }
 544     }
 545 }
 546
 547 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) {
 548     bool aborted = false;
 549     bool reached_screen_boundary = false;
 550     bool ok;
 551
 552     bool keep_tracing;
 553     bool initial_paint = true;
 554
 555     unsigned char *current_trace_t = get_pixel(trace_px, bci.x, bci.y, bci.width);
 556     unsigned int paint_directions;
 557
 558     bool currently_painting_top = false;
 559     bool currently_painting_bottom = false;
 560
 561     unsigned int pix_width = bci.width * 4;
 562
 563     unsigned int top_ty = bci.y - 1;
 564     unsigned int bottom_ty = bci.y + 1;
 565
 566     bool can_paint_top = (top_ty > 0);
 567     bool can_paint_bottom = (bottom_ty < bci.height);
 568
 569     NR::Point t = fill_queue->front();
 570
 571     do {
 572         ok = false;
 573         if (bci.is_left) {
 574             keep_tracing = (bci.x != 0);
 575         } else {
 576             keep_tracing = (bci.x < bci.width);
 577         }
 578
 579         if (keep_tracing) {
 580             if (check_if_pixel_is_paintable(px, current_trace_t, bci.x, bci.y, orig_color, bci)) {
 581                 paint_directions = paint_pixel(px, trace_px, orig_color, bci, current_trace_t);
 582                 if (bci.radius == 0) {
 583                     mark_pixel_checked(current_trace_t);
 584                     if ((t[NR::X] == bci.x) && (t[NR::Y] == bci.y)) {
 585                         fill_queue->pop_front(); t = fill_queue->front();
 586                     }
 587                 }
 588
 589                 if (can_paint_top) {
 590                     if (paint_directions & PAINT_DIRECTION_UP) {
 591                         unsigned char *trace_t = current_trace_t - pix_width;
 592                         if (!is_pixel_queued(trace_t)) {
 593                             bool ok_to_paint = check_if_pixel_is_paintable(px, trace_t, bci.x, top_ty, orig_color, bci);
 594
 595                             if (initial_paint) { currently_painting_top = !ok_to_paint; }
 596
 597                             if (ok_to_paint && (!currently_painting_top)) {
 598                                 currently_painting_top = true;
 599                                 push_point_onto_queue(fill_queue, bci.max_queue_size, trace_t, bci.x, top_ty);
 600                             }
 601                             if ((!ok_to_paint) && currently_painting_top) {
 602                                 currently_painting_top = false;
 603                             }
 604                         }
 605                     }
 606                 }
 607
 608                 if (can_paint_bottom) {
 609                     if (paint_directions & PAINT_DIRECTION_DOWN) {
 610                         unsigned char *trace_t = current_trace_t + pix_width;
 611                         if (!is_pixel_queued(trace_t)) {
 612                             bool ok_to_paint = check_if_pixel_is_paintable(px, trace_t, bci.x, bottom_ty, orig_color, bci);
 613
 614                             if (initial_paint) { currently_painting_bottom = !ok_to_paint; }
 615
 616                             if (ok_to_paint && (!currently_painting_bottom)) {
 617                                 currently_painting_bottom = true;
 618                                 push_point_onto_queue(fill_queue, bci.max_queue_size, trace_t, bci.x, bottom_ty);
 619                             }
 620                             if ((!ok_to_paint) && currently_painting_bottom) {
 621                                 currently_painting_bottom = false;
 622                             }
 623                         }
 624                     }
 625                 }
 626
 627                 if (bci.is_left) {
 628                     if (paint_directions & PAINT_DIRECTION_LEFT) {
 629                         bci.x -= 1; current_trace_t -= 4;
 630                         ok = true;
 631                     }
 632                 } else {
 633                     if (paint_directions & PAINT_DIRECTION_RIGHT) {
 634                         bci.x += 1; current_trace_t += 4;
 635                         ok = true;
 636                     }
 637                 }
 638
 639                 initial_paint = false;
 640             }
 641         } else {
 642             if (bci.bbox.min()[NR::X] > bci.screen.min()[NR::X]) {
 643                 aborted = true; break;
 644             } else {
 645                 reached_screen_boundary = true;
 646             }
 647         }
 648     } while (ok);
 649
 650     if (aborted) { return SCANLINE_CHECK_ABORTED; }
 651     if (reached_screen_boundary) { return SCANLINE_CHECK_BOUNDARY; }
 652     return SCANLINE_CHECK_OK;
 653 }
 654
 655 static bool sort_fill_queue_vertical(NR::Point a, NR::Point b) {
 656     return a[NR::Y] > b[NR::Y];
 657 }
 658
 659 static bool sort_fill_queue_horizontal(NR::Point a, NR::Point b) {
 660     return a[NR::X] > b[NR::X];
 661 }
 662
 663 static void sp_flood_do_flood_fill(SPEventContext *event_context, GdkEvent *event, bool union_with_selection, bool is_point_fill, bool is_touch_fill) {
 664     SPDesktop *desktop = event_context->desktop;
 665     SPDocument *document = sp_desktop_document(desktop);
 666
 667     /* Create new arena */
 668     NRArena *arena = NRArena::create();
 669     unsigned dkey = sp_item_display_key_new(1);
 670
 671     sp_document_ensure_up_to_date (document);
 672
 673     SPItem *document_root = SP_ITEM(SP_DOCUMENT_ROOT(document));
 674     NR::Maybe<NR::Rect> bbox = document_root->getBounds(NR::identity());
 675
 676     if (!bbox) {
 677         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("<b>Area is not bounded</b>, cannot fill."));
 678         return;
 679     }
 680
 681     double zoom_scale = desktop->current_zoom();
 682     double padding = 1.6;
 683
 684     NR::Rect screen = desktop->get_display_area();
 685
 686     unsigned int width = (int)ceil(screen.extent(NR::X) * zoom_scale * padding);
 687     unsigned int height = (int)ceil(screen.extent(NR::Y) * zoom_scale * padding);
 688
 689     NR::Point origin(screen.min()[NR::X],
 690                      sp_document_height(document) - screen.extent(NR::Y) - screen.min()[NR::Y]);
 691
 692     origin[NR::X] = origin[NR::X] + (screen.extent(NR::X) * ((1 - padding) / 2));
 693     origin[NR::Y] = origin[NR::Y] + (screen.extent(NR::Y) * ((1 - padding) / 2));
 694
 695     NR::scale scale(zoom_scale, zoom_scale);
 696     NR::Matrix affine = scale * NR::translate(-origin * scale);
 697
 698     /* Create ArenaItems and set transform */
 699     NRArenaItem *root = sp_item_invoke_show(SP_ITEM(sp_document_root(document)), arena, dkey, SP_ITEM_SHOW_DISPLAY);
 700     nr_arena_item_set_transform(NR_ARENA_ITEM(root), affine);
 701
 702     NRGC gc(NULL);
 703     nr_matrix_set_identity(&gc.transform);
 704
 705     NRRectL final_bbox;
 706     final_bbox.x0 = 0;
 707     final_bbox.y0 = 0;//row;
 708     final_bbox.x1 = width;
 709     final_bbox.y1 = height;//row + num_rows;
 710
 711     nr_arena_item_invoke_update(root, &final_bbox, &gc, NR_ARENA_ITEM_STATE_ALL, NR_ARENA_ITEM_STATE_NONE);
 712
 713     guchar *px = g_new(guchar, 4 * width * height);
 714
 715     NRPixBlock B;
 716     nr_pixblock_setup_extern( &B, NR_PIXBLOCK_MODE_R8G8B8A8N,
 717                               final_bbox.x0, final_bbox.y0, final_bbox.x1, final_bbox.y1,
 718                               px, 4 * width, FALSE, FALSE );
 719
 720     SPNamedView *nv = sp_desktop_namedview(desktop);
 721     unsigned long bgcolor = nv->pagecolor;
 722
 723     unsigned char dtc[4];
 724     dtc[0] = NR_RGBA32_R(bgcolor);
 725     dtc[1] = NR_RGBA32_G(bgcolor);
 726     dtc[2] = NR_RGBA32_B(bgcolor);
 727     dtc[3] = NR_RGBA32_A(bgcolor);
 728
 729     for (unsigned int fy = 0; fy < height; fy++) {
 730         guchar *p = NR_PIXBLOCK_PX(&B) + fy * B.rs;
 731         for (unsigned int fx = 0; fx < width; fx++) {
 732             for (int i = 0; i < 4; i++) {
 733                 *p++ = dtc[i];
 734             }
 735         }
 736     }
 737
 738     nr_arena_item_invoke_render(NULL, root, &final_bbox, &B, NR_ARENA_ITEM_RENDER_NO_CACHE );
 739     nr_pixblock_release(&B);
 740
 741     // Hide items
 742     sp_item_invoke_hide(SP_ITEM(sp_document_root(document)), dkey);
 743
 744     nr_arena_item_unref(root);
 745     nr_object_unref((NRObject *) arena);
 746
 747     guchar *trace_px = g_new(guchar, 4 * width * height);
 748     memset(trace_px, 0x00, 4 * width * height);
 749
 750     std::deque<NR::Point> fill_queue;
 751     std::queue<NR::Point> color_queue;
 752
 753     std::vector<NR::Point> fill_points;
 754
 755     bool aborted = false;
 756     int y_limit = height - 1;
 757
 758     PaintBucketChannels method = (PaintBucketChannels)prefs_get_int_attribute("tools.paintbucket", "channels", 0);
 759     int threshold = prefs_get_int_attribute_limited("tools.paintbucket", "threshold", 1, 0, 100);
 760
 761     switch(method) {
 762         case FLOOD_CHANNELS_ALPHA:
 763         case FLOOD_CHANNELS_RGB:
 764         case FLOOD_CHANNELS_R:
 765         case FLOOD_CHANNELS_G:
 766         case FLOOD_CHANNELS_B:
 767             threshold = (255 * threshold) / 100;
 768             break;
 769         case FLOOD_CHANNELS_H:
 770         case FLOOD_CHANNELS_S:
 771         case FLOOD_CHANNELS_L:
 772             break;
 773     }
 774
 775     bitmap_coords_info bci;
 776
 777     bci.y_limit = y_limit;
 778     bci.width = width;
 779     bci.height = height;
 780     bci.threshold = threshold;
 781     bci.method = method;
 782     bci.bbox = *bbox;
 783     bci.screen = screen;
 784     bci.dtc = dtc;
 785     bci.radius = prefs_get_int_attribute_limited("tools.paintbucket", "autogap", 0, 0, 3);
 786     bci.max_queue_size = (width * height) / 4;
 787     bci.current_step = 0;
 788
 789     if (is_point_fill) {
 790         fill_points.push_back(NR::Point(event->button.x, event->button.y));
 791     } else {
 792         Inkscape::Rubberband::Rubberband *r = Inkscape::Rubberband::get();
 793         fill_points = r->getPoints();
 794     }
 795
 796     for (unsigned int i = 0; i < fill_points.size(); i++) {
 797         NR::Point pw = NR::Point(fill_points[i][NR::X] / zoom_scale, sp_document_height(document) + (fill_points[i][NR::Y] / zoom_scale)) * affine;
 798
 799         pw[NR::X] = (int)MIN(width - 1, MAX(0, pw[NR::X]));
 800         pw[NR::Y] = (int)MIN(height - 1, MAX(0, pw[NR::Y]));
 801
 802         if (is_touch_fill) {
 803             if (i == 0) {
 804                 color_queue.push(pw);
 805             } else {
 806                 unsigned char *trace_t = get_pixel(trace_px, (int)pw[NR::X], (int)pw[NR::Y], width);
 807                 push_point_onto_queue(&fill_queue, bci.max_queue_size, trace_t, (int)pw[NR::X], (int)pw[NR::Y]);
 808             }
 809         } else {
 810             color_queue.push(pw);
 811         }
 812     }
 813
 814     bool reached_screen_boundary = false;
 815
 816     bool first_run = true;
 817
 818     unsigned long sort_size_threshold = 5;
 819
 820     while (!color_queue.empty() && !aborted) {
 821         NR::Point color_point = color_queue.front();
 822         color_queue.pop();
 823
 824         int cx = (int)color_point[NR::X];
 825         int cy = (int)color_point[NR::Y];
 826
 827         unsigned char *orig_px = get_pixel(px, cx, cy, width);
 828         unsigned char orig_color[4];
 829         for (int i = 0; i < 4; i++) { orig_color[i] = orig_px[i]; }
 830
 831         unsigned char merged_orig[3];
 832
 833         merge_pixel_with_background(orig_color, dtc, merged_orig);
 834
 835         bci.merged_orig_pixel = merged_orig;
 836
 837         unsigned char *trace_t = get_pixel(trace_px, cx, cy, width);
 838         if (!is_pixel_checked(trace_t) && !is_pixel_colored(trace_t)) {
 839             if (check_if_pixel_is_paintable(px, trace_px, cx, cy, orig_color, bci)) {
 840                 shift_point_onto_queue(&fill_queue, bci.max_queue_size, trace_t, cx, cy);
 841
 842                 if (!first_run) {
 843                     for (unsigned int y = 0; y < height; y++) {
 844                         trace_t = get_pixel(trace_px, 0, y, width);
 845                         for (unsigned int x = 0; x < width; x++) {
 846                             clear_pixel_paintability(trace_t);
 847                             trace_t += 4;
 848                         }
 849                     }
 850                 }
 851                 first_run = false;
 852             }
 853         }
 854
 855         unsigned long old_fill_queue_size = fill_queue.size();
 856
 857         while (!fill_queue.empty() && !aborted) {
 858             NR::Point cp = fill_queue.front();
 859
 860             if (bci.radius == 0) {
 861                 unsigned long new_fill_queue_size = fill_queue.size();
 862
 863                 if (new_fill_queue_size > sort_size_threshold) {
 864                     if (new_fill_queue_size > old_fill_queue_size) {
 865                         std::sort(fill_queue.begin(), fill_queue.end(), sort_fill_queue_vertical);
 866
 867                         std::deque<NR::Point>::iterator start_sort = fill_queue.begin();
 868                         std::deque<NR::Point>::iterator end_sort = fill_queue.begin();
 869                         unsigned int sort_y = (unsigned int)cp[NR::Y];
 870                         unsigned int current_y = sort_y;
 871
 872                         for (std::deque<NR::Point>::iterator i = fill_queue.begin(); i != fill_queue.end(); i++) {
 873                             NR::Point current = *i;
 874                             current_y = (unsigned int)current[NR::Y];
 875                             if (current_y != sort_y) {
 876                                 if (start_sort != end_sort) {
 877                                     std::sort(start_sort, end_sort, sort_fill_queue_horizontal);
 878                                 }
 879                                 sort_y = current_y;
 880                                 start_sort = i;
 881                             }
 882                             end_sort = i;
 883                         }
 884                         if (start_sort != end_sort) {
 885                             std::sort(start_sort, end_sort, sort_fill_queue_horizontal);
 886                         }
 887
 888                         cp = fill_queue.front();
 889                     }
 890                 }
 891
 892                 old_fill_queue_size = new_fill_queue_size;
 893             }
 894
 895             fill_queue.pop_front();
 896
 897             int x = (int)cp[NR::X];
 898             int y = (int)cp[NR::Y];
 899
 900             unsigned char *trace_t = get_pixel(trace_px, x, y, width);
 901             if (!is_pixel_checked(trace_t)) {
 902                 mark_pixel_checked(trace_t);
 903
 904                 if (y == 0) {
 905                     if (bbox->min()[NR::Y] > screen.min()[NR::Y]) {
 906                         aborted = true; break;
 907                     } else {
 908                         reached_screen_boundary = true;
 909                     }
 910                 }
 911
 912                 if (y == y_limit) {
 913                     if (bbox->max()[NR::Y] < screen.max()[NR::Y]) {
 914                         aborted = true; break;
 915                     } else {
 916                         reached_screen_boundary = true;
 917                     }
 918                 }
 919
 920                 bci.is_left = true;
 921                 bci.x = x;
 922                 bci.y = y;
 923
 924                 ScanlineCheckResult result = perform_bitmap_scanline_check(&fill_queue, px, trace_px, orig_color, bci);
 925
 926                 switch (result) {
 927                     case SCANLINE_CHECK_ABORTED:
 928                         aborted = true;
 929                         break;
 930                     case SCANLINE_CHECK_BOUNDARY:
 931                         reached_screen_boundary = true;
 932                         break;
 933                     default:
 934                         break;
 935                 }
 936
 937                 if (bci.x < width) {
 938                     trace_t += 4;
 939                     if (!is_pixel_checked(trace_t) && !is_pixel_queued(trace_t)) {
 940                         mark_pixel_checked(trace_t);
 941                         bci.is_left = false;
 942                         bci.x = x + 1;
 943
 944                         result = perform_bitmap_scanline_check(&fill_queue, px, trace_px, orig_color, bci);
 945
 946                         switch (result) {
 947                             case SCANLINE_CHECK_ABORTED:
 948                                 aborted = true;
 949                                 break;
 950                             case SCANLINE_CHECK_BOUNDARY:
 951                                 reached_screen_boundary = true;
 952                                 break;
 953                             default:
 954                                 break;
 955                         }
 956                     }
 957                 }
 958             }
 959
 960             bci.current_step++;
 961
 962             if (bci.current_step > bci.max_queue_size) {
 963                 aborted = true;
 964             }
 965         }
 966     }
 967
 968     g_free(px);
 969
 970     if (aborted) {
 971         g_free(trace_px);
 972         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("<b>Area is not bounded</b>, cannot fill."));
 973         return;
 974     }
 975
 976     if (reached_screen_boundary) {
 977         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."));
 978     }
 979
 980     GdkPixbuf* pixbuf = gdk_pixbuf_new_from_data(trace_px,
 981                                       GDK_COLORSPACE_RGB,
 982                                       TRUE,
 983                                       8, width, height, width * 4,
 984                                       (GdkPixbufDestroyNotify)g_free,
 985                                       NULL);
 986
 987     NR::Matrix inverted_affine = NR::Matrix(affine).inverse();
 988
 989     do_trace(pixbuf, desktop, inverted_affine, union_with_selection);
 990
 991     g_free(trace_px);
 992
 993     sp_document_done(document, SP_VERB_CONTEXT_PAINTBUCKET, _("Fill bounded area"));
 994 }
 995
 996 static gint sp_flood_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event)
 997 {
 998     gint ret = FALSE;
 999
1000     SPDesktop *desktop = event_context->desktop;
1001
1002     switch (event->type) {
1003     case GDK_BUTTON_PRESS:
1004         if ((event->button.state & GDK_CONTROL_MASK) && event->button.button == 1 && !event_context->space_panning) {
1005             NR::Point const button_w(event->button.x,
1006                                     event->button.y);
1007
1008             SPItem *item = sp_event_context_find_item (desktop, button_w, TRUE, TRUE);
1009
1010             Inkscape::XML::Node *pathRepr = SP_OBJECT_REPR(item);
1011             /* Set style */
1012             sp_desktop_apply_style_tool (desktop, pathRepr, "tools.paintbucket", false);
1013             sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_PAINTBUCKET, _("Set style on object"));
1014             ret = TRUE;
1015         }
1016         break;
1017     default:
1018         break;
1019     }
1020
1021     if (((SPEventContextClass *) parent_class)->item_handler) {
1022         ret = ((SPEventContextClass *) parent_class)->item_handler(event_context, item, event);
1023     }
1024
1025     return ret;
1026 }
1027
1028 static gint sp_flood_context_root_handler(SPEventContext *event_context, GdkEvent *event)
1029 {
1030     static bool dragging;
1031
1032     gint ret = FALSE;
1033     SPDesktop *desktop = event_context->desktop;
1034
1035     switch (event->type) {
1036     case GDK_BUTTON_PRESS:
1037         if (event->button.button == 1 && !event_context->space_panning) {
1038             if (!(event->button.state & GDK_CONTROL_MASK)) {
1039                 NR::Point const button_w(event->button.x,
1040                                         event->button.y);
1041
1042                 if (Inkscape::have_viable_layer(desktop, event_context->defaultMessageContext())) {
1043                     // save drag origin
1044                     event_context->xp = (gint) button_w[NR::X];
1045                     event_context->yp = (gint) button_w[NR::Y];
1046                     event_context->within_tolerance = true;
1047
1048                     dragging = true;
1049
1050                     NR::Point const p(desktop->w2d(button_w));
1051                     Inkscape::Rubberband::get()->setMode(RUBBERBAND_MODE_TOUCHPATH);
1052                     Inkscape::Rubberband::get()->start(desktop, p);
1053                 }
1054             }
1055         }
1056     case GDK_MOTION_NOTIFY:
1057         if ( dragging
1058              && ( event->motion.state & GDK_BUTTON1_MASK ) && !event_context->space_panning)
1059         {
1060             if ( event_context->within_tolerance
1061                  && ( abs( (gint) event->motion.x - event_context->xp ) < event_context->tolerance )
1062                  && ( abs( (gint) event->motion.y - event_context->yp ) < event_context->tolerance ) ) {
1063                 break; // do not drag if we're within tolerance from origin
1064             }
1065
1066             event_context->within_tolerance = false;
1067
1068             NR::Point const motion_pt(event->motion.x, event->motion.y);
1069             NR::Point const p(desktop->w2d(motion_pt));
1070             if (Inkscape::Rubberband::get()->is_started()) {
1071                 Inkscape::Rubberband::get()->move(p);
1072                 event_context->defaultMessageContext()->set(Inkscape::NORMAL_MESSAGE, _("<b>Draw over</b> areas to add to fill, hold <b>Alt</b> for touch fill"));
1073                 gobble_motion_events(GDK_BUTTON1_MASK);
1074             }
1075         }
1076         break;
1077
1078     case GDK_BUTTON_RELEASE:
1079         if (event->button.button == 1 && !event_context->space_panning) {
1080             Inkscape::Rubberband::Rubberband *r = Inkscape::Rubberband::get();
1081             if (r->is_started()) {
1082                 // set "busy" cursor
1083                 desktop->setWaitingCursor();
1084
1085                 if (SP_IS_EVENT_CONTEXT(event_context)) {
1086                     // Since setWaitingCursor runs main loop iterations, we may have already left this tool!
1087                     // So check if the tool is valid before doing anything
1088                     dragging = false;
1089
1090                     bool is_point_fill = event_context->within_tolerance;
1091                     bool is_touch_fill = event->button.state & GDK_MOD1_MASK;
1092
1093                     sp_flood_do_flood_fill(event_context, event, event->button.state & GDK_SHIFT_MASK, is_point_fill, is_touch_fill);
1094
1095                     desktop->clearWaitingCursor();
1096                     // restore cursor when done; note that it may already be different if e.g. user
1097                     // switched to another tool during interruptible tracing or drawing, in which case do nothing
1098
1099                     ret = TRUE;
1100                 }
1101
1102                 r->stop();
1103                 event_context->defaultMessageContext()->clear();
1104             }
1105         }
1106         break;
1107     case GDK_KEY_PRESS:
1108         switch (get_group0_keyval (&event->key)) {
1109         case GDK_Up:
1110         case GDK_Down:
1111         case GDK_KP_Up:
1112         case GDK_KP_Down:
1113             // prevent the zoom field from activation
1114             if (!MOD__CTRL_ONLY)
1115                 ret = TRUE;
1116             break;
1117         default:
1118             break;
1119         }
1120         break;
1121     default:
1122         break;
1123     }
1124
1125     if (!ret) {
1126         if (((SPEventContextClass *) parent_class)->root_handler) {
1127             ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
1128         }
1129     }
1130
1131     return ret;
1132 }
1133
1134
1135 static void sp_flood_finish(SPFloodContext *rc)
1136 {
1137     rc->_message_context->clear();
1138
1139     if ( rc->item != NULL ) {
1140         SPDesktop * desktop;
1141
1142         desktop = SP_EVENT_CONTEXT_DESKTOP(rc);
1143
1144         SP_OBJECT(rc->item)->updateRepr();
1145
1146         sp_canvas_end_forced_full_redraws(desktop->canvas);
1147
1148         sp_desktop_selection(desktop)->set(rc->item);
1149         sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_PAINTBUCKET,
1150                         _("Fill bounded area"));
1151
1152         rc->item = NULL;
1153     }
1154 }
1155
1156 void flood_channels_set_channels( gint channels )
1157 {
1158     prefs_set_int_attribute("tools.paintbucket", "channels", channels);
1159 }
1160
1161 /*
1162   Local Variables:
1163   mode:c++
1164   c-file-style:"stroustrup"
1165   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1166   indent-tabs-mode:nil
1167   fill-column:99
1168   End:
1169 */
1170 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :