4eb82b767cf74c8d91760e021411009b2c4404f9
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-context.h"
36 #include "pixmaps/cursor-rect.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"
46 #include "display/nr-arena-item.h"
47 #include "display/nr-arena.h"
48 #include "display/nr-arena-image.h"
49 #include "display/canvas-arena.h"
50 #include "helper/png-write.h"
51 #include "libnr/nr-pixops.h"
52 #include "libnr/nr-matrix-rotate-ops.h"
53 #include "libnr/nr-matrix-translate-ops.h"
54 #include "libnr/nr-rotate-fns.h"
55 #include "libnr/nr-scale-ops.h"
56 #include "libnr/nr-scale-translate-ops.h"
57 #include "libnr/nr-translate-matrix-ops.h"
58 #include "libnr/nr-translate-scale-ops.h"
59 #include "libnr/nr-matrix-ops.h"
60 #include "sp-item.h"
61 #include "sp-root.h"
62 #include "sp-defs.h"
63 #include "splivarot.h"
64 #include "livarot/Path.h"
65 #include "livarot/Shape.h"
66 #include "libnr/n-art-bpath.h"
67 #include "svg/svg.h"
69 #include "trace/trace.h"
70 #include "trace/potrace/inkscape-potrace.h"
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);
76 static void sp_flood_context_setup(SPEventContext *ec);
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);
81 static void sp_flood_finish(SPFloodContext *rc);
83 static SPEventContextClass *parent_class;
86 struct SPEBP {
87 int width, height, sheight;
88 guchar r, g, b, a;
89 NRArenaItem *root; // the root arena item to show; it is assumed that all unneeded items are hidden
90 guchar *px;
91 unsigned (*status)(float, void *);
92 void *data;
93 };
95 GtkType sp_flood_context_get_type()
96 {
97 static GType type = 0;
98 if (!type) {
99 GTypeInfo info = {
100 sizeof(SPFloodContextClass),
101 NULL, NULL,
102 (GClassInitFunc) sp_flood_context_class_init,
103 NULL, NULL,
104 sizeof(SPFloodContext),
105 4,
106 (GInstanceInitFunc) sp_flood_context_init,
107 NULL, /* value_table */
108 };
109 type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPFloodContext", &info, (GTypeFlags) 0);
110 }
111 return type;
112 }
114 static void sp_flood_context_class_init(SPFloodContextClass *klass)
115 {
116 GObjectClass *object_class = (GObjectClass *) klass;
117 SPEventContextClass *event_context_class = (SPEventContextClass *) klass;
119 parent_class = (SPEventContextClass *) g_type_class_peek_parent(klass);
121 object_class->dispose = sp_flood_context_dispose;
123 event_context_class->setup = sp_flood_context_setup;
124 event_context_class->root_handler = sp_flood_context_root_handler;
125 event_context_class->item_handler = sp_flood_context_item_handler;
126 }
128 static void sp_flood_context_init(SPFloodContext *flood_context)
129 {
130 SPEventContext *event_context = SP_EVENT_CONTEXT(flood_context);
132 event_context->cursor_shape = cursor_rect_xpm;
133 event_context->hot_x = 4;
134 event_context->hot_y = 4;
135 event_context->xp = 0;
136 event_context->yp = 0;
137 event_context->tolerance = 0;
138 event_context->within_tolerance = false;
139 event_context->item_to_select = NULL;
141 event_context->shape_repr = NULL;
142 event_context->shape_knot_holder = NULL;
144 flood_context->item = NULL;
146 new (&flood_context->sel_changed_connection) sigc::connection();
147 }
149 static void sp_flood_context_dispose(GObject *object)
150 {
151 SPFloodContext *rc = SP_FLOOD_CONTEXT(object);
152 SPEventContext *ec = SP_EVENT_CONTEXT(object);
154 rc->sel_changed_connection.disconnect();
155 rc->sel_changed_connection.~connection();
157 /* fixme: This is necessary because we do not grab */
158 if (rc->item) {
159 sp_flood_finish(rc);
160 }
162 if (ec->shape_repr) { // remove old listener
163 sp_repr_remove_listener_by_data(ec->shape_repr, ec);
164 Inkscape::GC::release(ec->shape_repr);
165 ec->shape_repr = 0;
166 }
168 if (rc->_message_context) {
169 delete rc->_message_context;
170 }
172 G_OBJECT_CLASS(parent_class)->dispose(object);
173 }
175 static Inkscape::XML::NodeEventVector ec_shape_repr_events = {
176 NULL, /* child_added */
177 NULL, /* child_removed */
178 ec_shape_event_attr_changed,
179 NULL, /* content_changed */
180 NULL /* order_changed */
181 };
183 /**
184 \brief Callback that processes the "changed" signal on the selection;
185 destroys old and creates new knotholder
186 */
187 void sp_flood_context_selection_changed(Inkscape::Selection *selection, gpointer data)
188 {
189 SPFloodContext *rc = SP_FLOOD_CONTEXT(data);
190 SPEventContext *ec = SP_EVENT_CONTEXT(rc);
192 if (ec->shape_repr) { // remove old listener
193 sp_repr_remove_listener_by_data(ec->shape_repr, ec);
194 Inkscape::GC::release(ec->shape_repr);
195 ec->shape_repr = 0;
196 }
198 SPItem *item = selection->singleItem();
199 if (item) {
200 Inkscape::XML::Node *shape_repr = SP_OBJECT_REPR(item);
201 if (shape_repr) {
202 ec->shape_repr = shape_repr;
203 Inkscape::GC::anchor(shape_repr);
204 sp_repr_add_listener(shape_repr, &ec_shape_repr_events, ec);
205 }
206 }
207 }
209 static void sp_flood_context_setup(SPEventContext *ec)
210 {
211 SPFloodContext *rc = SP_FLOOD_CONTEXT(ec);
213 if (((SPEventContextClass *) parent_class)->setup) {
214 ((SPEventContextClass *) parent_class)->setup(ec);
215 }
217 SPItem *item = sp_desktop_selection(ec->desktop)->singleItem();
218 if (item) {
219 Inkscape::XML::Node *shape_repr = SP_OBJECT_REPR(item);
220 if (shape_repr) {
221 ec->shape_repr = shape_repr;
222 Inkscape::GC::anchor(shape_repr);
223 sp_repr_add_listener(shape_repr, &ec_shape_repr_events, ec);
224 }
225 }
227 rc->sel_changed_connection.disconnect();
228 rc->sel_changed_connection = sp_desktop_selection(ec->desktop)->connectChanged(
229 sigc::bind(sigc::ptr_fun(&sp_flood_context_selection_changed), (gpointer)rc)
230 );
232 rc->_message_context = new Inkscape::MessageContext((ec->desktop)->messageStack());
233 }
235 /**
236 Hide all items which are not listed in list, recursively, skipping groups and defs
237 */
238 static void
239 hide_other_items_recursively(SPObject *o, GSList *list, unsigned dkey)
240 {
241 if (SP_IS_ITEM(o)
242 && !SP_IS_DEFS(o)
243 && !SP_IS_ROOT(o)
244 && !SP_IS_GROUP(o)
245 && !g_slist_find(list, o))
246 {
247 sp_item_invoke_hide(SP_ITEM(o), dkey);
248 }
250 // recurse
251 if (!g_slist_find(list, o)) {
252 for (SPObject *child = sp_object_first_child(o) ; child != NULL; child = SP_OBJECT_NEXT(child) ) {
253 hide_other_items_recursively(child, list, dkey);
254 }
255 }
256 }
258 inline unsigned char * get_pixel(guchar *px, int x, int y, int width) {
259 return px + (x + y * width) * 4;
260 }
262 static bool compare_pixels(unsigned char *a, unsigned char *b, int fuzziness) {
263 for (int i = 0; i < 4; i++) {
264 if (a[i] != b[i]) {
265 return false;
266 }
267 }
268 return true;
269 }
271 static void try_add_to_queue(std::queue<NR::Point> *fill_queue, guchar *px, unsigned char *orig, int x, int y, int width) {
272 unsigned char *t = get_pixel(px, x, y, width);
273 if (compare_pixels(t, orig, 0)) {
274 fill_queue->push(NR::Point(x, y));
275 }
276 }
278 static void do_trace(GdkPixbuf *px, SPDesktop *desktop, NR::Matrix transform) {
279 SPDocument *document = sp_desktop_document(desktop);
281 Inkscape::Trace::Potrace::PotraceTracingEngine pte;
283 pte.setTraceType(Inkscape::Trace::Potrace::TRACE_BRIGHTNESS);
284 pte.setInvert(false);
286 Glib::RefPtr<Gdk::Pixbuf> pixbuf = Glib::wrap(px, true);
288 std::vector<Inkscape::Trace::TracingEngineResult> results = pte.trace(pixbuf);
290 Inkscape::XML::Node *layer_repr = SP_GROUP(desktop->currentLayer())->repr;
291 Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
293 long totalNodeCount = 0L;
295 for (unsigned int i=0 ; i<results.size() ; i++) {
296 Inkscape::Trace::TracingEngineResult result = results[i];
297 totalNodeCount += result.getNodeCount();
299 Inkscape::XML::Node *pathRepr = xml_doc->createElement("svg:path");
300 /* Set style */
301 sp_desktop_apply_style_tool (desktop, pathRepr, "tools.flood", false);
303 NArtBpath *bpath = sp_svg_read_path(result.getPathData().c_str());
304 Path *path = bpath_to_Path(bpath);
305 g_free(bpath);
307 Shape *path_shape = new Shape();
309 path->ConvertWithBackData(0.03);
310 path->Fill(path_shape, 0);
311 delete path;
313 Shape *expanded_path_shape = new Shape();
315 expanded_path_shape->ConvertToShape(path_shape, fill_nonZero);
316 path_shape->MakeOffset(expanded_path_shape, 1.5, join_round, 4);
317 expanded_path_shape->ConvertToShape(path_shape, fill_positive);
319 Path *expanded_path = new Path();
321 expanded_path->Reset();
322 expanded_path_shape->ConvertToForme(expanded_path);
323 expanded_path->ConvertEvenLines(1.0);
324 expanded_path->Simplify(1.0);
326 delete path_shape;
327 delete expanded_path_shape;
329 gchar *str = expanded_path->svg_dump_path();
330 delete expanded_path;
331 pathRepr->setAttribute("d", str);
332 g_free(str);
334 layer_repr->addChild(pathRepr, NULL);
336 SPObject *reprobj = document->getObjectByRepr(pathRepr);
337 if (reprobj) {
338 sp_item_write_transform(SP_ITEM(reprobj), pathRepr, transform, NULL);
339 Inkscape::Selection *selection = sp_desktop_selection(desktop);
340 selection->set(reprobj);
341 pathRepr->setPosition(-1);
342 }
344 Inkscape::GC::release(pathRepr);
345 }
346 }
348 static void sp_flood_do_flood_fill(SPEventContext *event_context, GdkEvent *event) {
349 SPDesktop *desktop = event_context->desktop;
350 SPDocument *document = sp_desktop_document(desktop);
352 /* Create new arena */
353 NRArena *arena = NRArena::create();
354 unsigned dkey = sp_item_display_key_new(1);
356 sp_document_ensure_up_to_date (document);
358 SPItem *document_root = SP_ITEM(SP_DOCUMENT_ROOT(document));
359 NR::Rect bbox = document_root->invokeBbox(NR::identity());
361 if (bbox.isEmpty()) { return; }
363 int width = (int)ceil(bbox.extent(NR::X));
364 int height = (int)ceil(bbox.extent(NR::Y));
366 NR::Point origin(bbox.min()[NR::X], bbox.min()[NR::Y]);
368 NR::scale scale(width / (bbox.extent(NR::X)), height / (bbox.extent(NR::Y)));
369 NR::Matrix affine = scale * NR::translate(-origin * scale);
371 /* Create ArenaItems and set transform */
372 NRArenaItem *root = sp_item_invoke_show(SP_ITEM(sp_document_root(document)), arena, dkey, SP_ITEM_SHOW_DISPLAY);
373 nr_arena_item_set_transform(root, affine);
375 NRGC gc(NULL);
376 nr_matrix_set_identity(&gc.transform);
378 NRRectL final_bbox;
379 final_bbox.x0 = 0;
380 final_bbox.y0 = 0;//row;
381 final_bbox.x1 = width;
382 final_bbox.y1 = height;//row + num_rows;
384 nr_arena_item_invoke_update(root, &final_bbox, &gc, NR_ARENA_ITEM_STATE_ALL, NR_ARENA_ITEM_STATE_NONE);
386 // /* Set up pixblocks */
387 guchar *px = g_new(guchar, 4 * width * height);
388 memset(px, 0x00, 4 * width * height);
390 guchar *trace_px = g_new(guchar, 4 * width * height);
391 memset(trace_px, 0x00, 4 * width * height);
393 NRPixBlock B;
394 nr_pixblock_setup_extern( &B, NR_PIXBLOCK_MODE_R8G8B8A8N,
395 final_bbox.x0, final_bbox.y0, final_bbox.x1, final_bbox.y1,
396 px, 4 * width, FALSE, FALSE );
398 nr_arena_item_invoke_render( root, &final_bbox, &B, NR_ARENA_ITEM_RENDER_NO_CACHE );
400 nr_pixblock_release(&B);
401 nr_arena_item_unref(root);
402 nr_object_unref((NRObject *) arena);
404 double zoom_scale = desktop->current_zoom();
406 NR::Point pw = NR::Point(event->button.x / zoom_scale, sp_document_height(document) + (event->button.y / zoom_scale)) * affine;
408 pw[NR::X] = (int)MIN(width - 1, MAX(0, pw[NR::X]));
409 pw[NR::Y] = (int)MIN(height - 1, MAX(0, pw[NR::Y]));
411 std::queue<NR::Point> fill_queue;
412 fill_queue.push(pw);
414 bool aborted = false;
415 int y_limit = height - 1;
417 unsigned char orig_color[4];
418 unsigned char *orig_px = get_pixel(px, (int)pw[NR::X], (int)pw[NR::Y], width);
419 for (int i = 0; i < 4; i++) { orig_color[i] = orig_px[i]; }
421 while (!fill_queue.empty() && !aborted) {
422 NR::Point cp = fill_queue.front();
423 fill_queue.pop();
424 unsigned char *s = get_pixel(px, (int)cp[NR::X], (int)cp[NR::Y], width);
426 // same color at this point
427 if (compare_pixels(s, orig_color, 0)) {
428 int left = (int)cp[NR::X];
429 int right = (int)cp[NR::X] + 1;
430 int x = (int)cp[NR::X];
431 int y = (int)cp[NR::Y];
433 if (y > 0) {
434 try_add_to_queue(&fill_queue, px, orig_color, x, y - 1, width);
435 } else {
436 aborted = true; break;
437 }
438 if (y < y_limit) {
439 try_add_to_queue(&fill_queue, px, orig_color, x, y + 1, width);
440 } else {
441 aborted = true; break;
442 }
444 unsigned char *t, *trace_t;
445 bool ok = false;
447 do {
448 ok = false;
449 // go left
450 if (left >= 0) {
451 t = get_pixel(px, left, y, width);
452 if (compare_pixels(t, orig_color, 0)) {
453 for (int i = 0; i < 4; i++) { t[i] = 255 - t[i]; }
454 trace_t = get_pixel(trace_px, left, y, width);
455 trace_t[3] = 255;
456 if (y > 0) { try_add_to_queue(&fill_queue, px, orig_color, left, y - 1, width); }
457 if (y < y_limit) { try_add_to_queue(&fill_queue, px, orig_color, left, y + 1, width); }
458 left--; ok = true;
459 }
460 } else {
461 aborted = true; break;
462 }
463 } while (ok);
465 do {
466 ok = false;
467 // go left
468 if (right < width) {
469 t = get_pixel(px, right, y, width);
470 if (compare_pixels(t, orig_color, 0)) {
471 for (int i = 0; i < 4; i++) { t[i] = 255 - t[i]; }
472 trace_t = get_pixel(trace_px, right, y, width);
473 trace_t[3] = 255;
474 if (y > 0) { try_add_to_queue(&fill_queue, px, orig_color, right, y - 1, width); }
475 if (y < y_limit) { try_add_to_queue(&fill_queue, px, orig_color, right, y + 1, width); }
476 right++; ok = true;
477 }
478 } else {
479 aborted = true; break;
480 }
481 } while (ok);
482 }
483 }
485 g_free(px);
487 if (aborted) {
488 g_free(trace_px);
489 return;
490 }
492 GdkPixbuf* pixbuf = gdk_pixbuf_new_from_data(trace_px,
493 GDK_COLORSPACE_RGB,
494 TRUE,
495 8, width, height, width * 4,
496 (GdkPixbufDestroyNotify)g_free,
497 NULL);
499 NR::Matrix inverted_affine = NR::Matrix(affine).inverse();
501 do_trace(pixbuf, desktop, inverted_affine);
503 sp_document_done(document, SP_VERB_CONTEXT_FLOOD, _("Flood fill"));
504 }
506 static gint sp_flood_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event)
507 {
508 gint ret = FALSE;
510 switch (event->type) {
511 case GDK_BUTTON_PRESS:
512 if ( event->button.button == 1 ) {
513 sp_flood_do_flood_fill(event_context, event);
514 ret = TRUE;
515 }
516 break;
517 // motion and release are always on root (why?)
518 default:
519 break;
520 }
522 if (((SPEventContextClass *) parent_class)->item_handler) {
523 ret = ((SPEventContextClass *) parent_class)->item_handler(event_context, item, event);
524 }
526 return ret;
527 }
529 static gint sp_flood_context_root_handler(SPEventContext *event_context, GdkEvent *event)
530 {
531 gint ret = FALSE;
532 switch (event->type) {
533 case GDK_BUTTON_PRESS:
534 if ( event->button.button == 1 ) {
535 sp_flood_do_flood_fill(event_context, event);
537 ret = TRUE;
538 }
539 break;
540 default:
541 break;
542 }
544 if (!ret) {
545 if (((SPEventContextClass *) parent_class)->root_handler) {
546 ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
547 }
548 }
550 return ret;
551 }
554 static void sp_flood_finish(SPFloodContext *rc)
555 {
556 rc->_message_context->clear();
558 if ( rc->item != NULL ) {
559 SPDesktop * desktop;
561 desktop = SP_EVENT_CONTEXT_DESKTOP(rc);
563 SP_OBJECT(rc->item)->updateRepr();
565 sp_canvas_end_forced_full_redraws(desktop->canvas);
567 sp_desktop_selection(desktop)->set(rc->item);
568 sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_RECT,
569 _("Create floodangle"));
571 rc->item = NULL;
572 }
573 }
575 /*
576 Local Variables:
577 mode:c++
578 c-file-style:"stroustrup"
579 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
580 indent-tabs-mode:nil
581 fill-column:99
582 End:
583 */
584 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :