a6a66e952e9c1b3b515ebb5823bbe5f89d854fd7
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 for (int i = 0; i < 4; i++) {
265 if (abs(a[i] - b[i]) > tolerance) {
266 return false;
267 }
268 }
269 return true;
270 }
272 static void try_add_to_queue(std::queue<NR::Point> *fill_queue, guchar *px, unsigned char *orig, int x, int y, int width, int tolerance) {
273 unsigned char *t = get_pixel(px, x, y, width);
274 if (compare_pixels(t, orig, tolerance)) {
275 fill_queue->push(NR::Point(x, y));
276 }
277 }
279 static void do_trace(GdkPixbuf *px, SPDesktop *desktop, NR::Matrix transform) {
280 SPDocument *document = sp_desktop_document(desktop);
282 Inkscape::Trace::Potrace::PotraceTracingEngine pte;
284 pte.setTraceType(Inkscape::Trace::Potrace::TRACE_BRIGHTNESS);
285 pte.setInvert(false);
287 Glib::RefPtr<Gdk::Pixbuf> pixbuf = Glib::wrap(px, true);
289 std::vector<Inkscape::Trace::TracingEngineResult> results = pte.trace(pixbuf);
291 Inkscape::XML::Node *layer_repr = SP_GROUP(desktop->currentLayer())->repr;
292 Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
294 long totalNodeCount = 0L;
296 for (unsigned int i=0 ; i<results.size() ; i++) {
297 Inkscape::Trace::TracingEngineResult result = results[i];
298 totalNodeCount += result.getNodeCount();
300 Inkscape::XML::Node *pathRepr = xml_doc->createElement("svg:path");
301 /* Set style */
302 sp_desktop_apply_style_tool (desktop, pathRepr, "tools.paintbucket", false);
304 NArtBpath *bpath = sp_svg_read_path(result.getPathData().c_str());
305 Path *path = bpath_to_Path(bpath);
306 g_free(bpath);
308 Shape *path_shape = new Shape();
310 path->ConvertWithBackData(0.03);
311 path->Fill(path_shape, 0);
312 delete path;
314 Shape *expanded_path_shape = new Shape();
316 expanded_path_shape->ConvertToShape(path_shape, fill_nonZero);
317 path_shape->MakeOffset(expanded_path_shape, 1.5, join_round, 4);
318 expanded_path_shape->ConvertToShape(path_shape, fill_positive);
320 Path *expanded_path = new Path();
322 expanded_path->Reset();
323 expanded_path_shape->ConvertToForme(expanded_path);
324 expanded_path->ConvertEvenLines(1.0);
325 expanded_path->Simplify(1.0);
327 delete path_shape;
328 delete expanded_path_shape;
330 gchar *str = expanded_path->svg_dump_path();
331 delete expanded_path;
332 pathRepr->setAttribute("d", str);
333 g_free(str);
335 layer_repr->addChild(pathRepr, NULL);
337 SPObject *reprobj = document->getObjectByRepr(pathRepr);
338 if (reprobj) {
339 sp_item_write_transform(SP_ITEM(reprobj), pathRepr, transform, NULL);
341 // premultiply the item transform by the accumulated parent transform in the paste layer
342 NR::Matrix local = sp_item_i2doc_affine(SP_GROUP(desktop->currentLayer()));
343 if (!local.test_identity()) {
344 gchar const *t_str = pathRepr->attribute("transform");
345 NR::Matrix item_t (NR::identity());
346 if (t_str)
347 sp_svg_transform_read(t_str, &item_t);
348 item_t *= local.inverse();
349 // (we're dealing with unattached repr, so we write to its attr instead of using sp_item_set_transform)
350 gchar *affinestr=sp_svg_transform_write(item_t);
351 pathRepr->setAttribute("transform", affinestr);
352 g_free(affinestr);
353 }
355 Inkscape::Selection *selection = sp_desktop_selection(desktop);
356 selection->set(reprobj);
357 pathRepr->setPosition(-1);
358 }
360 Inkscape::GC::release(pathRepr);
361 }
362 }
364 static void sp_flood_do_flood_fill(SPEventContext *event_context, GdkEvent *event) {
365 SPDesktop *desktop = event_context->desktop;
366 SPDocument *document = sp_desktop_document(desktop);
368 /* Create new arena */
369 NRArena *arena = NRArena::create();
370 unsigned dkey = sp_item_display_key_new(1);
372 sp_document_ensure_up_to_date (document);
374 SPItem *document_root = SP_ITEM(SP_DOCUMENT_ROOT(document));
375 NR::Rect bbox = document_root->invokeBbox(NR::identity());
377 if (bbox.isEmpty()) {
378 desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("<b>Area is not bounded</b>, cannot fill."));
379 return;
380 }
382 double zoom_scale = desktop->current_zoom();
383 double padding = 1.6;
385 NR::Rect screen = desktop->get_display_area();
387 int width = (int)ceil(screen.extent(NR::X) * zoom_scale * padding);
388 int height = (int)ceil(screen.extent(NR::Y) * zoom_scale * padding);
390 NR::Point origin(screen.min()[NR::X],
391 sp_document_height(document) - screen.extent(NR::Y) - screen.min()[NR::Y]);
393 origin[NR::X] = origin[NR::X] + (screen.extent(NR::X) * ((1 - padding) / 2));
394 origin[NR::Y] = origin[NR::Y] + (screen.extent(NR::Y) * ((1 - padding) / 2));
396 NR::scale scale(zoom_scale, zoom_scale);
397 NR::Matrix affine = scale * NR::translate(-origin * scale);
399 /* Create ArenaItems and set transform */
400 NRArenaItem *root = sp_item_invoke_show(SP_ITEM(sp_document_root(document)), arena, dkey, SP_ITEM_SHOW_DISPLAY);
401 nr_arena_item_set_transform(NR_ARENA_ITEM(root), affine);
403 NRGC gc(NULL);
404 nr_matrix_set_identity(&gc.transform);
406 NRRectL final_bbox;
407 final_bbox.x0 = 0;
408 final_bbox.y0 = 0;//row;
409 final_bbox.x1 = width;
410 final_bbox.y1 = height;//row + num_rows;
412 nr_arena_item_invoke_update(root, &final_bbox, &gc, NR_ARENA_ITEM_STATE_ALL, NR_ARENA_ITEM_STATE_NONE);
414 guchar *px = g_new(guchar, 4 * width * height);
415 memset(px, 0x00, 4 * width * height);
417 NRPixBlock B;
418 nr_pixblock_setup_extern( &B, NR_PIXBLOCK_MODE_R8G8B8A8N,
419 final_bbox.x0, final_bbox.y0, final_bbox.x1, final_bbox.y1,
420 px, 4 * width, FALSE, FALSE );
422 nr_arena_item_invoke_render( root, &final_bbox, &B, NR_ARENA_ITEM_RENDER_NO_CACHE );
423 nr_pixblock_release(&B);
425 // Hide items
426 sp_item_invoke_hide(SP_ITEM(sp_document_root(document)), dkey);
428 nr_arena_item_unref(root);
429 nr_object_unref((NRObject *) arena);
431 NR::Point pw = NR::Point(event->button.x / zoom_scale, sp_document_height(document) + (event->button.y / zoom_scale)) * affine;
433 pw[NR::X] = (int)MIN(width - 1, MAX(0, pw[NR::X]));
434 pw[NR::Y] = (int)MIN(height - 1, MAX(0, pw[NR::Y]));
436 guchar *trace_px = g_new(guchar, 4 * width * height);
437 memset(trace_px, 0x00, 4 * width * height);
439 std::queue<NR::Point> fill_queue;
440 fill_queue.push(pw);
442 bool aborted = false;
443 int y_limit = height - 1;
445 unsigned char orig_color[4];
446 unsigned char *orig_px = get_pixel(px, (int)pw[NR::X], (int)pw[NR::Y], width);
447 for (int i = 0; i < 4; i++) { orig_color[i] = orig_px[i]; }
449 int tolerance = (255 * prefs_get_int_attribute_limited("tools.paintbucket", "tolerance", 1, 0, 100)) / 100;
451 while (!fill_queue.empty() && !aborted) {
452 NR::Point cp = fill_queue.front();
453 fill_queue.pop();
454 unsigned char *s = get_pixel(px, (int)cp[NR::X], (int)cp[NR::Y], width);
456 // same color at this point
457 if (compare_pixels(s, orig_color, tolerance)) {
458 int left = (int)cp[NR::X];
459 int right = (int)cp[NR::X] + 1;
460 int x = (int)cp[NR::X];
461 int y = (int)cp[NR::Y];
463 if (y > 0) {
464 try_add_to_queue(&fill_queue, px, orig_color, x, y - 1, width, tolerance);
465 } else {
466 aborted = true; break;
467 }
468 if (y < y_limit) {
469 try_add_to_queue(&fill_queue, px, orig_color, x, y + 1, width, tolerance);
470 } else {
471 aborted = true; break;
472 }
474 unsigned char *t, *trace_t;
475 bool ok = false;
477 do {
478 ok = false;
479 // go left
480 if (left >= 0) {
481 t = get_pixel(px, left, y, width);
482 if (compare_pixels(t, orig_color, tolerance)) {
483 for (int i = 0; i < 4; i++) { t[i] = 255 - t[i]; }
484 trace_t = get_pixel(trace_px, left, y, width);
485 trace_t[3] = 255;
486 if (y > 0) { try_add_to_queue(&fill_queue, px, orig_color, left, y - 1, width, tolerance); }
487 if (y < y_limit) { try_add_to_queue(&fill_queue, px, orig_color, left, y + 1, width, tolerance); }
488 left--; ok = true;
489 }
490 } else {
491 aborted = true; break;
492 }
493 } while (ok);
495 do {
496 ok = false;
497 // go right
498 if (right < width) {
499 t = get_pixel(px, right, y, width);
500 if (compare_pixels(t, orig_color, tolerance)) {
501 for (int i = 0; i < 4; i++) { t[i] = 255 - t[i]; }
502 trace_t = get_pixel(trace_px, right, y, width);
503 trace_t[3] = 255;
504 if (y > 0) { try_add_to_queue(&fill_queue, px, orig_color, right, y - 1, width, tolerance); }
505 if (y < y_limit) { try_add_to_queue(&fill_queue, px, orig_color, right, y + 1, width, tolerance); }
506 right++; ok = true;
507 }
508 } else {
509 aborted = true; break;
510 }
511 } while (ok);
512 }
513 }
515 g_free(px);
517 if (aborted) {
518 g_free(trace_px);
519 desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("<b>Area is not bounded</b>, cannot fill."));
520 return;
521 }
523 GdkPixbuf* pixbuf = gdk_pixbuf_new_from_data(trace_px,
524 GDK_COLORSPACE_RGB,
525 TRUE,
526 8, width, height, width * 4,
527 (GdkPixbufDestroyNotify)g_free,
528 NULL);
530 NR::Matrix inverted_affine = NR::Matrix(affine).inverse();
532 do_trace(pixbuf, desktop, inverted_affine);
534 g_free(trace_px);
536 sp_document_done(document, SP_VERB_CONTEXT_PAINTBUCKET, _("Fill bounded area"));
537 }
539 static gint sp_flood_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event)
540 {
541 gint ret = FALSE;
543 switch (event->type) {
544 case GDK_BUTTON_PRESS:
545 break;
546 // motion and release are always on root (why?)
547 default:
548 break;
549 }
551 if (((SPEventContextClass *) parent_class)->item_handler) {
552 ret = ((SPEventContextClass *) parent_class)->item_handler(event_context, item, event);
553 }
555 return ret;
556 }
558 static gint sp_flood_context_root_handler(SPEventContext *event_context, GdkEvent *event)
559 {
560 SPDesktop *desktop = event_context->desktop;
562 gint ret = FALSE;
563 switch (event->type) {
564 case GDK_BUTTON_PRESS:
565 if ( event->button.button == 1 ) {
566 sp_flood_do_flood_fill(event_context, event);
568 ret = TRUE;
569 }
570 break;
571 case GDK_KEY_PRESS:
572 switch (get_group0_keyval (&event->key)) {
573 case GDK_Up:
574 case GDK_Down:
575 case GDK_KP_Up:
576 case GDK_KP_Down:
577 // prevent the zoom field from activation
578 if (!MOD__CTRL_ONLY)
579 ret = TRUE;
580 break;
581 case GDK_Escape:
582 sp_desktop_selection(desktop)->clear();
583 default:
584 break;
585 }
586 break;
587 default:
588 break;
589 }
591 if (!ret) {
592 if (((SPEventContextClass *) parent_class)->root_handler) {
593 ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
594 }
595 }
597 return ret;
598 }
601 static void sp_flood_finish(SPFloodContext *rc)
602 {
603 rc->_message_context->clear();
605 if ( rc->item != NULL ) {
606 SPDesktop * desktop;
608 desktop = SP_EVENT_CONTEXT_DESKTOP(rc);
610 SP_OBJECT(rc->item)->updateRepr();
612 sp_canvas_end_forced_full_redraws(desktop->canvas);
614 sp_desktop_selection(desktop)->set(rc->item);
615 sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_PAINTBUCKET,
616 _("Fill bounded area"));
618 rc->item = NULL;
619 }
620 }
622 /*
623 Local Variables:
624 mode:c++
625 c-file-style:"stroustrup"
626 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
627 indent-tabs-mode:nil
628 fill-column:99
629 End:
630 */
631 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :