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