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     do {
 570         ok = false;
 571         if (bci.is_left) {
 572             keep_tracing = (bci.x != 0);
 573         } else {
 574             keep_tracing = (bci.x < bci.width);
 575         }
 576
 577         if (keep_tracing) {
 578             if (check_if_pixel_is_paintable(px, current_trace_t, bci.x, bci.y, orig_color, bci)) {
 579                 paint_directions = paint_pixel(px, trace_px, orig_color, bci, current_trace_t);
 580                 if (bci.radius == 0) {
 581                     mark_pixel_checked(current_trace_t);
 582                 }
 583
 584                 if (can_paint_top) {
 585                     if (paint_directions & PAINT_DIRECTION_UP) {
 586                         unsigned char *trace_t = current_trace_t - pix_width;
 587                         if (!is_pixel_queued(trace_t)) {
 588                             bool ok_to_paint = check_if_pixel_is_paintable(px, trace_t, bci.x, top_ty, orig_color, bci);
 589
 590                             if (initial_paint) { currently_painting_top = !ok_to_paint; }
 591
 592                             if (ok_to_paint && (!currently_painting_top)) {
 593                                 currently_painting_top = true;
 594                                 push_point_onto_queue(fill_queue, bci.max_queue_size, trace_t, bci.x, top_ty);
 595                             }
 596                             if ((!ok_to_paint) && currently_painting_top) {
 597                                 currently_painting_top = false;
 598                             }
 599                         }
 600                     }
 601                 }
 602
 603                 if (can_paint_bottom) {
 604                     if (paint_directions & PAINT_DIRECTION_DOWN) {
 605                         unsigned char *trace_t = current_trace_t + pix_width;
 606                         if (!is_pixel_queued(trace_t)) {
 607                             bool ok_to_paint = check_if_pixel_is_paintable(px, trace_t, bci.x, bottom_ty, orig_color, bci);
 608
 609                             if (initial_paint) { currently_painting_bottom = !ok_to_paint; }
 610
 611                             if (ok_to_paint && (!currently_painting_bottom)) {
 612                                 currently_painting_bottom = true;
 613                                 push_point_onto_queue(fill_queue, bci.max_queue_size, trace_t, bci.x, bottom_ty);
 614                             }
 615                             if ((!ok_to_paint) && currently_painting_bottom) {
 616                                 currently_painting_bottom = false;
 617                             }
 618                         }
 619                     }
 620                 }
 621
 622                 if (bci.is_left) {
 623                     if (paint_directions & PAINT_DIRECTION_LEFT) {
 624                         bci.x -= 1; current_trace_t -= 4;
 625                         ok = true;
 626                     }
 627                 } else {
 628                     if (paint_directions & PAINT_DIRECTION_RIGHT) {
 629                         bci.x += 1; current_trace_t += 4;
 630                         ok = true;
 631                     }
 632                 }
 633
 634                 initial_paint = false;
 635             }
 636         } else {
 637             if (bci.bbox.min()[NR::X] > bci.screen.min()[NR::X]) {
 638                 aborted = true; break;
 639             } else {
 640                 reached_screen_boundary = true;
 641             }
 642         }
 643     } while (ok);
 644
 645     if (aborted) { return SCANLINE_CHECK_ABORTED; }
 646     if (reached_screen_boundary) { return SCANLINE_CHECK_BOUNDARY; }
 647     return SCANLINE_CHECK_OK;
 648 }
 649
 650 static void sp_flood_do_flood_fill(SPEventContext *event_context, GdkEvent *event, bool union_with_selection, bool is_point_fill, bool is_touch_fill) {
 651     SPDesktop *desktop = event_context->desktop;
 652     SPDocument *document = sp_desktop_document(desktop);
 653
 654     /* Create new arena */
 655     NRArena *arena = NRArena::create();
 656     unsigned dkey = sp_item_display_key_new(1);
 657
 658     sp_document_ensure_up_to_date (document);
 659
 660     SPItem *document_root = SP_ITEM(SP_DOCUMENT_ROOT(document));
 661     NR::Maybe<NR::Rect> bbox = document_root->getBounds(NR::identity());
 662
 663     if (!bbox) {
 664         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("<b>Area is not bounded</b>, cannot fill."));
 665         return;
 666     }
 667
 668     double zoom_scale = desktop->current_zoom();
 669     double padding = 1.6;
 670
 671     NR::Rect screen = desktop->get_display_area();
 672
 673     unsigned int width = (int)ceil(screen.extent(NR::X) * zoom_scale * padding);
 674     unsigned int height = (int)ceil(screen.extent(NR::Y) * zoom_scale * padding);
 675
 676     NR::Point origin(screen.min()[NR::X],
 677                      sp_document_height(document) - screen.extent(NR::Y) - screen.min()[NR::Y]);
 678
 679     origin[NR::X] = origin[NR::X] + (screen.extent(NR::X) * ((1 - padding) / 2));
 680     origin[NR::Y] = origin[NR::Y] + (screen.extent(NR::Y) * ((1 - padding) / 2));
 681
 682     NR::scale scale(zoom_scale, zoom_scale);
 683     NR::Matrix affine = scale * NR::translate(-origin * scale);
 684
 685     /* Create ArenaItems and set transform */
 686     NRArenaItem *root = sp_item_invoke_show(SP_ITEM(sp_document_root(document)), arena, dkey, SP_ITEM_SHOW_DISPLAY);
 687     nr_arena_item_set_transform(NR_ARENA_ITEM(root), affine);
 688
 689     NRGC gc(NULL);
 690     nr_matrix_set_identity(&gc.transform);
 691
 692     NRRectL final_bbox;
 693     final_bbox.x0 = 0;
 694     final_bbox.y0 = 0;//row;
 695     final_bbox.x1 = width;
 696     final_bbox.y1 = height;//row + num_rows;
 697
 698     nr_arena_item_invoke_update(root, &final_bbox, &gc, NR_ARENA_ITEM_STATE_ALL, NR_ARENA_ITEM_STATE_NONE);
 699
 700     guchar *px = g_new(guchar, 4 * width * height);
 701
 702     NRPixBlock B;
 703     nr_pixblock_setup_extern( &B, NR_PIXBLOCK_MODE_R8G8B8A8N,
 704                               final_bbox.x0, final_bbox.y0, final_bbox.x1, final_bbox.y1,
 705                               px, 4 * width, FALSE, FALSE );
 706
 707     SPNamedView *nv = sp_desktop_namedview(desktop);
 708     unsigned long bgcolor = nv->pagecolor;
 709
 710     unsigned char dtc[4];
 711     dtc[0] = NR_RGBA32_R(bgcolor);
 712     dtc[1] = NR_RGBA32_G(bgcolor);
 713     dtc[2] = NR_RGBA32_B(bgcolor);
 714     dtc[3] = NR_RGBA32_A(bgcolor);
 715
 716     for (unsigned int fy = 0; fy < height; fy++) {
 717         guchar *p = NR_PIXBLOCK_PX(&B) + fy * B.rs;
 718         for (unsigned int fx = 0; fx < width; fx++) {
 719             for (int i = 0; i < 4; i++) {
 720                 *p++ = dtc[i];
 721             }
 722         }
 723     }
 724
 725     nr_arena_item_invoke_render(NULL, root, &final_bbox, &B, NR_ARENA_ITEM_RENDER_NO_CACHE );
 726     nr_pixblock_release(&B);
 727
 728     // Hide items
 729     sp_item_invoke_hide(SP_ITEM(sp_document_root(document)), dkey);
 730
 731     nr_arena_item_unref(root);
 732     nr_object_unref((NRObject *) arena);
 733
 734     guchar *trace_px = g_new(guchar, 4 * width * height);
 735     memset(trace_px, 0x00, 4 * width * height);
 736
 737     std::deque<NR::Point> fill_queue;
 738     std::queue<NR::Point> color_queue;
 739
 740     std::vector<NR::Point> fill_points;
 741
 742     bool aborted = false;
 743     int y_limit = height - 1;
 744
 745     PaintBucketChannels method = (PaintBucketChannels)prefs_get_int_attribute("tools.paintbucket", "channels", 0);
 746     int threshold = prefs_get_int_attribute_limited("tools.paintbucket", "threshold", 1, 0, 100);
 747
 748     switch(method) {
 749         case FLOOD_CHANNELS_ALPHA:
 750         case FLOOD_CHANNELS_RGB:
 751         case FLOOD_CHANNELS_R:
 752         case FLOOD_CHANNELS_G:
 753         case FLOOD_CHANNELS_B:
 754             threshold = (255 * threshold) / 100;
 755             break;
 756         case FLOOD_CHANNELS_H:
 757         case FLOOD_CHANNELS_S:
 758         case FLOOD_CHANNELS_L:
 759             break;
 760     }
 761
 762     bitmap_coords_info bci;
 763
 764     bci.y_limit = y_limit;
 765     bci.width = width;
 766     bci.height = height;
 767     bci.threshold = threshold;
 768     bci.method = method;
 769     bci.bbox = *bbox;
 770     bci.screen = screen;
 771     bci.dtc = dtc;
 772     bci.radius = prefs_get_int_attribute_limited("tools.paintbucket", "autogap", 0, 0, 3);
 773     bci.max_queue_size = (width * height) / 16;
 774     bci.current_step = 0;
 775
 776     if (is_point_fill) {
 777         fill_points.push_back(NR::Point(event->button.x, event->button.y));
 778     } else {
 779         Inkscape::Rubberband::Rubberband *r = Inkscape::Rubberband::get();
 780         fill_points = r->getPoints();
 781     }
 782
 783     for (unsigned int i = 0; i < fill_points.size(); i++) {
 784         NR::Point pw = NR::Point(fill_points[i][NR::X] / zoom_scale, sp_document_height(document) + (fill_points[i][NR::Y] / zoom_scale)) * affine;
 785
 786         pw[NR::X] = (int)MIN(width - 1, MAX(0, pw[NR::X]));
 787         pw[NR::Y] = (int)MIN(height - 1, MAX(0, pw[NR::Y]));
 788
 789         if (is_touch_fill) {
 790             if (i == 0) {
 791                 color_queue.push(pw);
 792             } else {
 793                 unsigned char *trace_t = get_pixel(trace_px, (int)pw[NR::X], (int)pw[NR::Y], width);
 794                 push_point_onto_queue(&fill_queue, bci.max_queue_size, trace_t, (int)pw[NR::X], (int)pw[NR::Y]);
 795             }
 796         } else {
 797             color_queue.push(pw);
 798         }
 799     }
 800
 801     bool reached_screen_boundary = false;
 802
 803     bool first_run = true;
 804
 805     while (!color_queue.empty() && !aborted) {
 806         NR::Point color_point = color_queue.front();
 807         color_queue.pop();
 808
 809         int cx = (int)color_point[NR::X];
 810         int cy = (int)color_point[NR::Y];
 811
 812         unsigned char *orig_px = get_pixel(px, cx, cy, width);
 813         unsigned char orig_color[4];
 814         for (int i = 0; i < 4; i++) { orig_color[i] = orig_px[i]; }
 815
 816         unsigned char merged_orig[3];
 817
 818         merge_pixel_with_background(orig_color, dtc, merged_orig);
 819
 820         bci.merged_orig_pixel = merged_orig;
 821
 822         unsigned char *trace_t = get_pixel(trace_px, cx, cy, width);
 823         if (!is_pixel_checked(trace_t) && !is_pixel_colored(trace_t)) {
 824             if (check_if_pixel_is_paintable(px, trace_px, cx, cy, orig_color, bci)) {
 825                 shift_point_onto_queue(&fill_queue, bci.max_queue_size, trace_t, cx, cy);
 826
 827                 if (!first_run) {
 828                     for (unsigned int y = 0; y < height; y++) {
 829                         trace_t = get_pixel(trace_px, 0, y, width);
 830                         for (unsigned int x = 0; x < width; x++) {
 831                             clear_pixel_paintability(trace_t);
 832                             trace_t += 4;
 833                         }
 834                     }
 835                 }
 836                 first_run = false;
 837             }
 838         }
 839
 840         while (!fill_queue.empty() && !aborted) {
 841             NR::Point cp = fill_queue.front();
 842             fill_queue.pop_front();
 843
 844             int x = (int)cp[NR::X];
 845             int y = (int)cp[NR::Y];
 846
 847             unsigned char *trace_t = get_pixel(trace_px, x, y, width);
 848             if (!is_pixel_checked(trace_t)) {
 849                 mark_pixel_checked(trace_t);
 850
 851                 if (y == 0) {
 852                     if (bbox->min()[NR::Y] > screen.min()[NR::Y]) {
 853                         aborted = true; break;
 854                     } else {
 855                         reached_screen_boundary = true;
 856                     }
 857                 }
 858
 859                 if (y == y_limit) {
 860                     if (bbox->max()[NR::Y] < screen.max()[NR::Y]) {
 861                         aborted = true; break;
 862                     } else {
 863                         reached_screen_boundary = true;
 864                     }
 865                 }
 866
 867                 bci.is_left = true;
 868                 bci.x = x;
 869                 bci.y = y;
 870
 871                 ScanlineCheckResult result = perform_bitmap_scanline_check(&fill_queue, px, trace_px, orig_color, bci);
 872
 873                 switch (result) {
 874                     case SCANLINE_CHECK_ABORTED:
 875                         aborted = true;
 876                         break;
 877                     case SCANLINE_CHECK_BOUNDARY:
 878                         reached_screen_boundary = true;
 879                         break;
 880                     default:
 881                         break;
 882                 }
 883
 884                 if (bci.x < width) {
 885                     trace_t += 4;
 886                     if (!is_pixel_checked(trace_t) && !is_pixel_queued(trace_t)) {
 887                         mark_pixel_checked(trace_t);
 888                         bci.is_left = false;
 889                         bci.x = x + 1;
 890
 891                         result = perform_bitmap_scanline_check(&fill_queue, px, trace_px, orig_color, bci);
 892
 893                         switch (result) {
 894                             case SCANLINE_CHECK_ABORTED:
 895                                 aborted = true;
 896                                 break;
 897                             case SCANLINE_CHECK_BOUNDARY:
 898                                 reached_screen_boundary = true;
 899                                 break;
 900                             default:
 901                                 break;
 902                         }
 903                     }
 904                 }
 905             }
 906
 907             bci.current_step++;
 908
 909             if (bci.current_step > bci.max_queue_size) {
 910                 aborted = true;
 911             }
 912         }
 913     }
 914
 915     g_free(px);
 916
 917     if (aborted) {
 918         g_free(trace_px);
 919         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("<b>Area is not bounded</b>, cannot fill."));
 920         return;
 921     }
 922
 923     if (reached_screen_boundary) {
 924         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."));
 925     }
 926
 927     GdkPixbuf* pixbuf = gdk_pixbuf_new_from_data(trace_px,
 928                                       GDK_COLORSPACE_RGB,
 929                                       TRUE,
 930                                       8, width, height, width * 4,
 931                                       (GdkPixbufDestroyNotify)g_free,
 932                                       NULL);
 933
 934     NR::Matrix inverted_affine = NR::Matrix(affine).inverse();
 935
 936     do_trace(pixbuf, desktop, inverted_affine, union_with_selection);
 937
 938     g_free(trace_px);
 939
 940     sp_document_done(document, SP_VERB_CONTEXT_PAINTBUCKET, _("Fill bounded area"));
 941 }
 942
 943 static gint sp_flood_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event)
 944 {
 945     gint ret = FALSE;
 946
 947     SPDesktop *desktop = event_context->desktop;
 948
 949     switch (event->type) {
 950     case GDK_BUTTON_PRESS:
 951         if ((event->button.state & GDK_CONTROL_MASK) && event->button.button == 1 && !event_context->space_panning) {
 952             NR::Point const button_w(event->button.x,
 953                                     event->button.y);
 954
 955             SPItem *item = sp_event_context_find_item (desktop, button_w, TRUE, TRUE);
 956
 957             Inkscape::XML::Node *pathRepr = SP_OBJECT_REPR(item);
 958             /* Set style */
 959             sp_desktop_apply_style_tool (desktop, pathRepr, "tools.paintbucket", false);
 960             sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_PAINTBUCKET, _("Set style on object"));
 961             ret = TRUE;
 962         }
 963         break;
 964     default:
 965         break;
 966     }
 967
 968     if (((SPEventContextClass *) parent_class)->item_handler) {
 969         ret = ((SPEventContextClass *) parent_class)->item_handler(event_context, item, event);
 970     }
 971
 972     return ret;
 973 }
 974
 975 static gint sp_flood_context_root_handler(SPEventContext *event_context, GdkEvent *event)
 976 {
 977     static bool dragging;
 978
 979     gint ret = FALSE;
 980     SPDesktop *desktop = event_context->desktop;
 981
 982     switch (event->type) {
 983     case GDK_BUTTON_PRESS:
 984         if (event->button.button == 1 && !event_context->space_panning) {
 985             if (!(event->button.state & GDK_CONTROL_MASK)) {
 986                 NR::Point const button_w(event->button.x,
 987                                         event->button.y);
 988
 989                 if (Inkscape::have_viable_layer(desktop, event_context->defaultMessageContext())) {
 990                     // save drag origin
 991                     event_context->xp = (gint) button_w[NR::X];
 992                     event_context->yp = (gint) button_w[NR::Y];
 993                     event_context->within_tolerance = true;
 994
 995                     dragging = true;
 996
 997                     NR::Point const p(desktop->w2d(button_w));
 998                     Inkscape::Rubberband::get()->setMode(RUBBERBAND_MODE_TOUCHPATH);
 999                     Inkscape::Rubberband::get()->start(desktop, p);
1000                 }
1001             }
1002         }
1003     case GDK_MOTION_NOTIFY:
1004         if ( dragging
1005              && ( event->motion.state & GDK_BUTTON1_MASK ) && !event_context->space_panning)
1006         {
1007             if ( event_context->within_tolerance
1008                  && ( abs( (gint) event->motion.x - event_context->xp ) < event_context->tolerance )
1009                  && ( abs( (gint) event->motion.y - event_context->yp ) < event_context->tolerance ) ) {
1010                 break; // do not drag if we're within tolerance from origin
1011             }
1012
1013             event_context->within_tolerance = false;
1014
1015             NR::Point const motion_pt(event->motion.x, event->motion.y);
1016             NR::Point const p(desktop->w2d(motion_pt));
1017             if (Inkscape::Rubberband::get()->is_started()) {
1018                 Inkscape::Rubberband::get()->move(p);
1019                 event_context->defaultMessageContext()->set(Inkscape::NORMAL_MESSAGE, _("<b>Draw over</b> areas to add to fill, hold <b>Alt</b> for touch fill"));
1020                 gobble_motion_events(GDK_BUTTON1_MASK);
1021             }
1022         }
1023         break;
1024
1025     case GDK_BUTTON_RELEASE:
1026         if (event->button.button == 1 && !event_context->space_panning) {
1027             Inkscape::Rubberband::Rubberband *r = Inkscape::Rubberband::get();
1028             if (r->is_started()) {
1029                 // set "busy" cursor
1030                 desktop->setWaitingCursor();
1031
1032                 if (SP_IS_EVENT_CONTEXT(event_context)) {
1033                     // Since setWaitingCursor runs main loop iterations, we may have already left this tool!
1034                     // So check if the tool is valid before doing anything
1035                     dragging = false;
1036
1037                     bool is_point_fill = event_context->within_tolerance;
1038                     bool is_touch_fill = event->button.state & GDK_MOD1_MASK;
1039
1040                     sp_flood_do_flood_fill(event_context, event, event->button.state & GDK_SHIFT_MASK, is_point_fill, is_touch_fill);
1041
1042                     desktop->clearWaitingCursor();
1043                     // restore cursor when done; note that it may already be different if e.g. user
1044                     // switched to another tool during interruptible tracing or drawing, in which case do nothing
1045
1046                     ret = TRUE;
1047                 }
1048
1049                 r->stop();
1050                 event_context->defaultMessageContext()->clear();
1051             }
1052         }
1053         break;
1054     case GDK_KEY_PRESS:
1055         switch (get_group0_keyval (&event->key)) {
1056         case GDK_Up:
1057         case GDK_Down:
1058         case GDK_KP_Up:
1059         case GDK_KP_Down:
1060             // prevent the zoom field from activation
1061             if (!MOD__CTRL_ONLY)
1062                 ret = TRUE;
1063             break;
1064         default:
1065             break;
1066         }
1067         break;
1068     default:
1069         break;
1070     }
1071
1072     if (!ret) {
1073         if (((SPEventContextClass *) parent_class)->root_handler) {
1074             ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
1075         }
1076     }
1077
1078     return ret;
1079 }
1080
1081
1082 static void sp_flood_finish(SPFloodContext *rc)
1083 {
1084     rc->_message_context->clear();
1085
1086     if ( rc->item != NULL ) {
1087         SPDesktop * desktop;
1088
1089         desktop = SP_EVENT_CONTEXT_DESKTOP(rc);
1090
1091         SP_OBJECT(rc->item)->updateRepr();
1092
1093         sp_canvas_end_forced_full_redraws(desktop->canvas);
1094
1095         sp_desktop_selection(desktop)->set(rc->item);
1096         sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_PAINTBUCKET,
1097                         _("Fill bounded area"));
1098
1099         rc->item = NULL;
1100     }
1101 }
1102
1103 void flood_channels_set_channels( gint channels )
1104 {
1105     prefs_set_int_attribute("tools.paintbucket", "channels", channels);
1106 }
1107
1108 /*
1109   Local Variables:
1110   mode:c++
1111   c-file-style:"stroustrup"
1112   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1113   indent-tabs-mode:nil
1114   fill-column:99
1115   End:
1116 */
1117 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :