da8f22513c29f03f8b3c183924efcef9f3249017
1 #define __SP_FLOOD_CONTEXT_C__
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 */
18 #include "config.h"
20 #include <gdk/gdkkeysyms.h>
21 #include <queue>
23 #include "macros.h"
24 #include "display/sp-canvas.h"
25 #include "document.h"
26 #include "sp-namedview.h"
27 #include "sp-object.h"
28 #include "sp-rect.h"
29 #include "selection.h"
30 #include "selection-chemistry.h"
31 #include "desktop-handles.h"
32 #include "snap.h"
33 #include "desktop.h"
34 #include "desktop-style.h"
35 #include "message-stack.h"
36 #include "message-context.h"
37 #include "pixmaps/cursor-paintbucket.xpm"
38 #include "flood-context.h"
39 #include "sp-metrics.h"
40 #include <glibmm/i18n.h>
41 #include "object-edit.h"
42 #include "xml/repr.h"
43 #include "xml/node-event-vector.h"
44 #include "prefs-utils.h"
45 #include "context-fns.h"
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 "helper/png-write.h"
52 #include "libnr/nr-pixops.h"
53 #include "libnr/nr-matrix-rotate-ops.h"
54 #include "libnr/nr-matrix-translate-ops.h"
55 #include "libnr/nr-rotate-fns.h"
56 #include "libnr/nr-scale-ops.h"
57 #include "libnr/nr-scale-translate-ops.h"
58 #include "libnr/nr-translate-matrix-ops.h"
59 #include "libnr/nr-translate-scale-ops.h"
60 #include "libnr/nr-matrix-ops.h"
61 #include "sp-item.h"
62 #include "sp-root.h"
63 #include "sp-defs.h"
64 #include "splivarot.h"
65 #include "livarot/Path.h"
66 #include "livarot/Shape.h"
67 #include "libnr/n-art-bpath.h"
68 #include "svg/svg.h"
70 #include "trace/trace.h"
71 #include "trace/potrace/inkscape-potrace.h"
73 static void sp_flood_context_class_init(SPFloodContextClass *klass);
74 static void sp_flood_context_init(SPFloodContext *flood_context);
75 static void sp_flood_context_dispose(GObject *object);
77 static void sp_flood_context_setup(SPEventContext *ec);
79 static gint sp_flood_context_root_handler(SPEventContext *event_context, GdkEvent *event);
80 static gint sp_flood_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event);
82 static void sp_flood_finish(SPFloodContext *rc);
84 static SPEventContextClass *parent_class;
87 struct SPEBP {
88 int width, height, sheight;
89 guchar r, g, b, a;
90 NRArenaItem *root; // the root arena item to show; it is assumed that all unneeded items are hidden
91 guchar *px;
92 unsigned (*status)(float, void *);
93 void *data;
94 };
96 GtkType sp_flood_context_get_type()
97 {
98 static GType type = 0;
99 if (!type) {
100 GTypeInfo info = {
101 sizeof(SPFloodContextClass),
102 NULL, NULL,
103 (GClassInitFunc) sp_flood_context_class_init,
104 NULL, NULL,
105 sizeof(SPFloodContext),
106 4,
107 (GInstanceInitFunc) sp_flood_context_init,
108 NULL, /* value_table */
109 };
110 type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPFloodContext", &info, (GTypeFlags) 0);
111 }
112 return type;
113 }
115 static void sp_flood_context_class_init(SPFloodContextClass *klass)
116 {
117 GObjectClass *object_class = (GObjectClass *) klass;
118 SPEventContextClass *event_context_class = (SPEventContextClass *) klass;
120 parent_class = (SPEventContextClass *) g_type_class_peek_parent(klass);
122 object_class->dispose = sp_flood_context_dispose;
124 event_context_class->setup = sp_flood_context_setup;
125 event_context_class->root_handler = sp_flood_context_root_handler;
126 event_context_class->item_handler = sp_flood_context_item_handler;
127 }
129 static void sp_flood_context_init(SPFloodContext *flood_context)
130 {
131 SPEventContext *event_context = SP_EVENT_CONTEXT(flood_context);
133 event_context->cursor_shape = cursor_paintbucket_xpm;
134 event_context->hot_x = 11;
135 event_context->hot_y = 30;
136 event_context->xp = 0;
137 event_context->yp = 0;
138 event_context->tolerance = 0;
139 event_context->within_tolerance = false;
140 event_context->item_to_select = NULL;
142 event_context->shape_repr = NULL;
143 event_context->shape_knot_holder = NULL;
145 flood_context->item = NULL;
147 new (&flood_context->sel_changed_connection) sigc::connection();
148 }
150 static void sp_flood_context_dispose(GObject *object)
151 {
152 SPFloodContext *rc = SP_FLOOD_CONTEXT(object);
153 SPEventContext *ec = SP_EVENT_CONTEXT(object);
155 rc->sel_changed_connection.disconnect();
156 rc->sel_changed_connection.~connection();
158 /* fixme: This is necessary because we do not grab */
159 if (rc->item) {
160 sp_flood_finish(rc);
161 }
163 if (ec->shape_repr) { // remove old listener
164 sp_repr_remove_listener_by_data(ec->shape_repr, ec);
165 Inkscape::GC::release(ec->shape_repr);
166 ec->shape_repr = 0;
167 }
169 if (rc->_message_context) {
170 delete rc->_message_context;
171 }
173 G_OBJECT_CLASS(parent_class)->dispose(object);
174 }
176 static Inkscape::XML::NodeEventVector ec_shape_repr_events = {
177 NULL, /* child_added */
178 NULL, /* child_removed */
179 ec_shape_event_attr_changed,
180 NULL, /* content_changed */
181 NULL /* order_changed */
182 };
184 /**
185 \brief Callback that processes the "changed" signal on the selection;
186 destroys old and creates new knotholder
187 */
188 void sp_flood_context_selection_changed(Inkscape::Selection *selection, gpointer data)
189 {
190 SPFloodContext *rc = SP_FLOOD_CONTEXT(data);
191 SPEventContext *ec = SP_EVENT_CONTEXT(rc);
193 if (ec->shape_repr) { // remove old listener
194 sp_repr_remove_listener_by_data(ec->shape_repr, ec);
195 Inkscape::GC::release(ec->shape_repr);
196 ec->shape_repr = 0;
197 }
199 SPItem *item = selection->singleItem();
200 if (item) {
201 Inkscape::XML::Node *shape_repr = SP_OBJECT_REPR(item);
202 if (shape_repr) {
203 ec->shape_repr = shape_repr;
204 Inkscape::GC::anchor(shape_repr);
205 sp_repr_add_listener(shape_repr, &ec_shape_repr_events, ec);
206 }
207 }
208 }
210 static void sp_flood_context_setup(SPEventContext *ec)
211 {
212 SPFloodContext *rc = SP_FLOOD_CONTEXT(ec);
214 if (((SPEventContextClass *) parent_class)->setup) {
215 ((SPEventContextClass *) parent_class)->setup(ec);
216 }
218 SPItem *item = sp_desktop_selection(ec->desktop)->singleItem();
219 if (item) {
220 Inkscape::XML::Node *shape_repr = SP_OBJECT_REPR(item);
221 if (shape_repr) {
222 ec->shape_repr = shape_repr;
223 Inkscape::GC::anchor(shape_repr);
224 sp_repr_add_listener(shape_repr, &ec_shape_repr_events, ec);
225 }
226 }
228 rc->sel_changed_connection.disconnect();
229 rc->sel_changed_connection = sp_desktop_selection(ec->desktop)->connectChanged(
230 sigc::bind(sigc::ptr_fun(&sp_flood_context_selection_changed), (gpointer)rc)
231 );
233 rc->_message_context = new Inkscape::MessageContext((ec->desktop)->messageStack());
234 }
236 /**
237 Hide all items which are not listed in list, recursively, skipping groups and defs
238 */
239 static void
240 hide_other_items_recursively(SPObject *o, GSList *list, unsigned dkey)
241 {
242 if (SP_IS_ITEM(o)
243 && !SP_IS_DEFS(o)
244 && !SP_IS_ROOT(o)
245 && !SP_IS_GROUP(o)
246 && !g_slist_find(list, o))
247 {
248 sp_item_invoke_hide(SP_ITEM(o), dkey);
249 }
251 // recurse
252 if (!g_slist_find(list, o)) {
253 for (SPObject *child = sp_object_first_child(o) ; child != NULL; child = SP_OBJECT_NEXT(child) ) {
254 hide_other_items_recursively(child, list, dkey);
255 }
256 }
257 }
259 inline unsigned char * get_pixel(guchar *px, int x, int y, int width) {
260 return px + (x + y * width) * 4;
261 }
263 static bool compare_pixels(unsigned char *a, unsigned char *b, int tolerance) {
264 int diff = 0;
265 for (int i = 0; i < 4; i++) {
266 diff += (int)abs(a[i] - b[i]);
267 }
268 return ((diff / 4) <= tolerance);
269 }
271 static bool try_add_to_queue(std::queue<NR::Point> *fill_queue, guchar *px, guchar *trace_px, unsigned char *orig, int x, int y, int width, int tolerance, bool fill_switch) {
272 unsigned char *t = get_pixel(px, x, y, width);
273 if (compare_pixels(t, orig, tolerance)) {
274 unsigned char *trace_t = get_pixel(trace_px, x, y, width);
275 if (trace_t[3] != 255) {
276 if (fill_switch) {
277 fill_queue->push(NR::Point(x, y));
278 }
279 }
280 return false;
281 }
282 return true;
283 }
285 static void do_trace(GdkPixbuf *px, SPDesktop *desktop, NR::Matrix transform) {
286 SPDocument *document = sp_desktop_document(desktop);
288 Inkscape::Trace::Potrace::PotraceTracingEngine pte;
290 pte.setTraceType(Inkscape::Trace::Potrace::TRACE_BRIGHTNESS);
291 pte.setInvert(false);
293 Glib::RefPtr<Gdk::Pixbuf> pixbuf = Glib::wrap(px, true);
295 std::vector<Inkscape::Trace::TracingEngineResult> results = pte.trace(pixbuf);
297 Inkscape::XML::Node *layer_repr = SP_GROUP(desktop->currentLayer())->repr;
298 Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
300 long totalNodeCount = 0L;
302 for (unsigned int i=0 ; i<results.size() ; i++) {
303 Inkscape::Trace::TracingEngineResult result = results[i];
304 totalNodeCount += result.getNodeCount();
306 Inkscape::XML::Node *pathRepr = xml_doc->createElement("svg:path");
307 /* Set style */
308 sp_desktop_apply_style_tool (desktop, pathRepr, "tools.paintbucket", false);
310 NArtBpath *bpath = sp_svg_read_path(result.getPathData().c_str());
311 Path *path = bpath_to_Path(bpath);
312 g_free(bpath);
314 Shape *path_shape = new Shape();
316 path->ConvertWithBackData(0.03);
317 path->Fill(path_shape, 0);
318 delete path;
320 Shape *expanded_path_shape = new Shape();
322 expanded_path_shape->ConvertToShape(path_shape, fill_nonZero);
323 path_shape->MakeOffset(expanded_path_shape, 1.5, join_round, 4);
324 expanded_path_shape->ConvertToShape(path_shape, fill_positive);
326 Path *expanded_path = new Path();
328 expanded_path->Reset();
329 expanded_path_shape->ConvertToForme(expanded_path);
330 expanded_path->ConvertEvenLines(1.0);
331 expanded_path->Simplify(1.0);
333 delete path_shape;
334 delete expanded_path_shape;
336 gchar *str = expanded_path->svg_dump_path();
337 delete expanded_path;
338 pathRepr->setAttribute("d", str);
339 g_free(str);
341 layer_repr->addChild(pathRepr, NULL);
343 SPObject *reprobj = document->getObjectByRepr(pathRepr);
344 if (reprobj) {
345 sp_item_write_transform(SP_ITEM(reprobj), pathRepr, transform, NULL);
347 // premultiply the item transform by the accumulated parent transform in the paste layer
348 NR::Matrix local = sp_item_i2doc_affine(SP_GROUP(desktop->currentLayer()));
349 if (!local.test_identity()) {
350 gchar const *t_str = pathRepr->attribute("transform");
351 NR::Matrix item_t (NR::identity());
352 if (t_str)
353 sp_svg_transform_read(t_str, &item_t);
354 item_t *= local.inverse();
355 // (we're dealing with unattached repr, so we write to its attr instead of using sp_item_set_transform)
356 gchar *affinestr=sp_svg_transform_write(item_t);
357 pathRepr->setAttribute("transform", affinestr);
358 g_free(affinestr);
359 }
361 Inkscape::Selection *selection = sp_desktop_selection(desktop);
362 selection->set(reprobj);
363 pathRepr->setPosition(-1);
364 }
366 Inkscape::GC::release(pathRepr);
367 }
368 }
370 static void sp_flood_do_flood_fill(SPEventContext *event_context, GdkEvent *event) {
371 SPDesktop *desktop = event_context->desktop;
372 SPDocument *document = sp_desktop_document(desktop);
374 /* Create new arena */
375 NRArena *arena = NRArena::create();
376 unsigned dkey = sp_item_display_key_new(1);
378 sp_document_ensure_up_to_date (document);
380 SPItem *document_root = SP_ITEM(SP_DOCUMENT_ROOT(document));
381 NR::Rect bbox = document_root->invokeBbox(NR::identity());
383 if (bbox.isEmpty()) {
384 desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("<b>Area is not bounded</b>, cannot fill."));
385 return;
386 }
388 double zoom_scale = desktop->current_zoom();
389 double padding = 1.6;
391 NR::Rect screen = desktop->get_display_area();
393 int width = (int)ceil(screen.extent(NR::X) * zoom_scale * padding);
394 int height = (int)ceil(screen.extent(NR::Y) * zoom_scale * padding);
396 NR::Point origin(screen.min()[NR::X],
397 sp_document_height(document) - screen.extent(NR::Y) - screen.min()[NR::Y]);
399 origin[NR::X] = origin[NR::X] + (screen.extent(NR::X) * ((1 - padding) / 2));
400 origin[NR::Y] = origin[NR::Y] + (screen.extent(NR::Y) * ((1 - padding) / 2));
402 NR::scale scale(zoom_scale, zoom_scale);
403 NR::Matrix affine = scale * NR::translate(-origin * scale);
405 /* Create ArenaItems and set transform */
406 NRArenaItem *root = sp_item_invoke_show(SP_ITEM(sp_document_root(document)), arena, dkey, SP_ITEM_SHOW_DISPLAY);
407 nr_arena_item_set_transform(NR_ARENA_ITEM(root), affine);
409 NRGC gc(NULL);
410 nr_matrix_set_identity(&gc.transform);
412 NRRectL final_bbox;
413 final_bbox.x0 = 0;
414 final_bbox.y0 = 0;//row;
415 final_bbox.x1 = width;
416 final_bbox.y1 = height;//row + num_rows;
418 nr_arena_item_invoke_update(root, &final_bbox, &gc, NR_ARENA_ITEM_STATE_ALL, NR_ARENA_ITEM_STATE_NONE);
420 guchar *px = g_new(guchar, 4 * width * height);
421 memset(px, 0x00, 4 * width * height);
423 NRPixBlock B;
424 nr_pixblock_setup_extern( &B, NR_PIXBLOCK_MODE_R8G8B8A8N,
425 final_bbox.x0, final_bbox.y0, final_bbox.x1, final_bbox.y1,
426 px, 4 * width, FALSE, FALSE );
428 nr_arena_item_invoke_render( root, &final_bbox, &B, NR_ARENA_ITEM_RENDER_NO_CACHE );
429 nr_pixblock_release(&B);
431 // Hide items
432 sp_item_invoke_hide(SP_ITEM(sp_document_root(document)), dkey);
434 nr_arena_item_unref(root);
435 nr_object_unref((NRObject *) arena);
437 NR::Point pw = NR::Point(event->button.x / zoom_scale, sp_document_height(document) + (event->button.y / zoom_scale)) * affine;
439 pw[NR::X] = (int)MIN(width - 1, MAX(0, pw[NR::X]));
440 pw[NR::Y] = (int)MIN(height - 1, MAX(0, pw[NR::Y]));
442 guchar *trace_px = g_new(guchar, 4 * width * height);
443 memset(trace_px, 0x00, 4 * width * height);
445 std::queue<NR::Point> fill_queue;
446 fill_queue.push(pw);
448 bool aborted = false;
449 int y_limit = height - 1;
451 unsigned char orig_color[4];
452 unsigned char *orig_px = get_pixel(px, (int)pw[NR::X], (int)pw[NR::Y], width);
453 for (int i = 0; i < 4; i++) { orig_color[i] = orig_px[i]; }
455 int tolerance = (255 * prefs_get_int_attribute_limited("tools.paintbucket", "tolerance", 1, 0, 100)) / 100;
457 while (!fill_queue.empty() && !aborted) {
458 NR::Point cp = fill_queue.front();
459 fill_queue.pop();
460 unsigned char *s = get_pixel(px, (int)cp[NR::X], (int)cp[NR::Y], width);
462 // same color at this point
463 if (compare_pixels(s, orig_color, tolerance)) {
464 int left = (int)cp[NR::X];
465 int right = (int)cp[NR::X] + 1;
466 int x = (int)cp[NR::X];
467 int y = (int)cp[NR::Y];
469 bool top_fill = true;
470 bool bottom_fill = true;
472 if (y > 0) {
473 top_fill = try_add_to_queue(&fill_queue, px, trace_px, orig_color, x, y - 1, width, tolerance, top_fill);
474 } else {
475 aborted = true; break;
476 }
477 if (y < y_limit) {
478 bottom_fill = try_add_to_queue(&fill_queue, px, trace_px, orig_color, x, y + 1, width, tolerance, bottom_fill);
479 } else {
480 aborted = true; break;
481 }
483 bool default_top_fill = top_fill;
484 bool default_bottom_fill = bottom_fill;
486 unsigned char *t, *trace_t;
487 bool ok = false;
489 do {
490 ok = false;
491 // go left
492 if (left >= 0) {
493 t = get_pixel(px, left, y, width);
494 if (compare_pixels(t, orig_color, tolerance)) {
495 for (int i = 0; i < 4; i++) { t[i] = 255 - t[i]; }
496 trace_t = get_pixel(trace_px, left, y, width);
497 trace_t[3] = 255;
498 if (y > 0) { top_fill = try_add_to_queue(&fill_queue, px, trace_px, orig_color, left, y - 1, width, tolerance, top_fill); }
499 if (y < y_limit) { bottom_fill = try_add_to_queue(&fill_queue, px, trace_px, orig_color, left, y + 1, width, tolerance, bottom_fill); }
500 left--; ok = true;
501 }
502 } else {
503 aborted = true; break;
504 }
505 } while (ok);
507 top_fill = default_top_fill;
508 bottom_fill = default_bottom_fill;
510 do {
511 ok = false;
512 // go right
513 if (right < width) {
514 t = get_pixel(px, right, y, width);
515 if (compare_pixels(t, orig_color, tolerance)) {
516 for (int i = 0; i < 4; i++) { t[i] = 255 - t[i]; }
517 trace_t = get_pixel(trace_px, right, y, width);
518 trace_t[3] = 255;
519 if (y > 0) { top_fill = try_add_to_queue(&fill_queue, px, trace_px, orig_color, right, y - 1, width, tolerance, top_fill); }
520 if (y < y_limit) { bottom_fill = try_add_to_queue(&fill_queue, px, trace_px, orig_color, right, y + 1, width, tolerance, bottom_fill); }
521 right++; ok = true;
522 }
523 } else {
524 aborted = true; break;
525 }
526 } while (ok);
527 }
528 }
530 g_free(px);
532 if (aborted) {
533 g_free(trace_px);
534 desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("<b>Area is not bounded</b>, cannot fill."));
535 return;
536 }
538 GdkPixbuf* pixbuf = gdk_pixbuf_new_from_data(trace_px,
539 GDK_COLORSPACE_RGB,
540 TRUE,
541 8, width, height, width * 4,
542 (GdkPixbufDestroyNotify)g_free,
543 NULL);
545 NR::Matrix inverted_affine = NR::Matrix(affine).inverse();
547 do_trace(pixbuf, desktop, inverted_affine);
549 g_free(trace_px);
551 sp_document_done(document, SP_VERB_CONTEXT_PAINTBUCKET, _("Fill bounded area"));
552 }
554 static gint sp_flood_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event)
555 {
556 gint ret = FALSE;
558 switch (event->type) {
559 case GDK_BUTTON_PRESS:
560 break;
561 // motion and release are always on root (why?)
562 default:
563 break;
564 }
566 if (((SPEventContextClass *) parent_class)->item_handler) {
567 ret = ((SPEventContextClass *) parent_class)->item_handler(event_context, item, event);
568 }
570 return ret;
571 }
573 static gint sp_flood_context_root_handler(SPEventContext *event_context, GdkEvent *event)
574 {
575 SPDesktop *desktop = event_context->desktop;
577 gint ret = FALSE;
578 switch (event->type) {
579 case GDK_BUTTON_PRESS:
580 if ( event->button.button == 1 ) {
581 sp_flood_do_flood_fill(event_context, event);
583 ret = TRUE;
584 }
585 break;
586 case GDK_KEY_PRESS:
587 switch (get_group0_keyval (&event->key)) {
588 case GDK_Up:
589 case GDK_Down:
590 case GDK_KP_Up:
591 case GDK_KP_Down:
592 // prevent the zoom field from activation
593 if (!MOD__CTRL_ONLY)
594 ret = TRUE;
595 break;
596 case GDK_Escape:
597 sp_desktop_selection(desktop)->clear();
598 default:
599 break;
600 }
601 break;
602 default:
603 break;
604 }
606 if (!ret) {
607 if (((SPEventContextClass *) parent_class)->root_handler) {
608 ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
609 }
610 }
612 return ret;
613 }
616 static void sp_flood_finish(SPFloodContext *rc)
617 {
618 rc->_message_context->clear();
620 if ( rc->item != NULL ) {
621 SPDesktop * desktop;
623 desktop = SP_EVENT_CONTEXT_DESKTOP(rc);
625 SP_OBJECT(rc->item)->updateRepr();
627 sp_canvas_end_forced_full_redraws(desktop->canvas);
629 sp_desktop_selection(desktop)->set(rc->item);
630 sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_PAINTBUCKET,
631 _("Fill bounded area"));
633 rc->item = NULL;
634 }
635 }
637 /*
638 Local Variables:
639 mode:c++
640 c-file-style:"stroustrup"
641 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
642 indent-tabs-mode:nil
643 fill-column:99
644 End:
645 */
646 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :