68e4d3c9ee5ef71ec8fdfdd681849fb4820d3302
1 #define __NR_ARENA_ITEM_C__
3 /*
4 * RGBA display list system for inkscape
5 *
6 * Author:
7 * Lauris Kaplinski <lauris@kaplinski.com>
8 *
9 * Copyright (C) 2001-2002 Lauris Kaplinski
10 * Copyright (C) 2001 Ximian, Inc.
11 *
12 * Released under GNU GPL, read the file 'COPYING' for more information
13 */
15 #define noNR_ARENA_ITEM_VERBOSE
16 #define noNR_ARENA_ITEM_DEBUG_CASCADE
19 #include <libnr/nr-blit.h>
20 #include <libnr/nr-pixops.h>
21 #include "nr-arena.h"
22 #include "nr-arena-item.h"
23 #include "gc-core.h"
25 #include "nr-filter.h"
26 #include "libnr/nr-rect.h"
27 #include "nr-arena-group.h"
28 #include "prefs-utils.h"
30 namespace GC = Inkscape::GC;
32 static void nr_arena_item_class_init (NRArenaItemClass *klass);
33 static void nr_arena_item_init (NRArenaItem *item);
34 static void nr_arena_item_private_finalize (NRObject *object);
36 static NRObjectClass *parent_class;
38 NRType
39 nr_arena_item_get_type (void)
40 {
41 static NRType type = 0;
42 if (!type) {
43 type = nr_object_register_type (NR_TYPE_OBJECT,
44 "NRArenaItem",
45 sizeof (NRArenaItemClass),
46 sizeof (NRArenaItem),
47 (void (*)(NRObjectClass *))
48 nr_arena_item_class_init,
49 (void (*)(NRObject *))
50 nr_arena_item_init);
51 }
52 return type;
53 }
55 static void
56 nr_arena_item_class_init (NRArenaItemClass *klass)
57 {
58 NRObjectClass *object_class;
60 object_class = (NRObjectClass *) klass;
62 parent_class = ((NRObjectClass *) klass)->parent;
64 object_class->finalize = nr_arena_item_private_finalize;
65 object_class->cpp_ctor = NRObject::invoke_ctor < NRArenaItem >;
66 }
68 static void
69 nr_arena_item_init (NRArenaItem *item)
70 {
71 item->arena = NULL;
72 item->parent = NULL;
73 item->next = item->prev = NULL;
75 item->key = 0;
77 item->state = 0;
78 item->sensitive = TRUE;
79 item->visible = TRUE;
81 memset (&item->bbox, 0, sizeof (item->bbox));
82 item->transform = NULL;
83 item->opacity = 255;
84 item->render_opacity = FALSE;
86 item->transform = NULL;
87 item->clip = NULL;
88 item->mask = NULL;
89 item->px = NULL;
90 item->data = NULL;
91 item->filter = NULL;
92 item->background_pb = NULL;
93 item->background_new = false;
94 }
96 static void
97 nr_arena_item_private_finalize (NRObject *object)
98 {
99 NRArenaItem *item = static_cast < NRArenaItem * >(object);
101 item->px = NULL;
102 item->transform = NULL;
104 ((NRObjectClass *) (parent_class))->finalize (object);
105 }
107 NRArenaItem *
108 nr_arena_item_children (NRArenaItem *item)
109 {
110 nr_return_val_if_fail (item != NULL, NULL);
111 nr_return_val_if_fail (NR_IS_ARENA_ITEM (item), NULL);
113 if (NR_ARENA_ITEM_VIRTUAL (item, children))
114 return NR_ARENA_ITEM_VIRTUAL (item, children) (item);
116 return NULL;
117 }
119 NRArenaItem *
120 nr_arena_item_last_child (NRArenaItem *item)
121 {
122 nr_return_val_if_fail (item != NULL, NULL);
123 nr_return_val_if_fail (NR_IS_ARENA_ITEM (item), NULL);
125 if (NR_ARENA_ITEM_VIRTUAL (item, last_child)) {
126 return NR_ARENA_ITEM_VIRTUAL (item, last_child) (item);
127 } else {
128 NRArenaItem *ref = nr_arena_item_children (item);
129 if (ref)
130 while (ref->next)
131 ref = ref->next;
132 return ref;
133 }
134 }
136 void
137 nr_arena_item_add_child (NRArenaItem *item, NRArenaItem *child,
138 NRArenaItem *ref)
139 {
140 nr_return_if_fail (item != NULL);
141 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
142 nr_return_if_fail (child != NULL);
143 nr_return_if_fail (NR_IS_ARENA_ITEM (child));
144 nr_return_if_fail (child->parent == NULL);
145 nr_return_if_fail (child->prev == NULL);
146 nr_return_if_fail (child->next == NULL);
147 nr_return_if_fail (child->arena == item->arena);
148 nr_return_if_fail (child != ref);
149 nr_return_if_fail (!ref || NR_IS_ARENA_ITEM (ref));
150 nr_return_if_fail (!ref || (ref->parent == item));
152 if (NR_ARENA_ITEM_VIRTUAL (item, add_child))
153 NR_ARENA_ITEM_VIRTUAL (item, add_child) (item, child, ref);
154 }
156 void
157 nr_arena_item_remove_child (NRArenaItem *item, NRArenaItem *child)
158 {
159 nr_return_if_fail (item != NULL);
160 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
161 nr_return_if_fail (child != NULL);
162 nr_return_if_fail (NR_IS_ARENA_ITEM (child));
163 nr_return_if_fail (child->parent == item);
165 if (NR_ARENA_ITEM_VIRTUAL (item, remove_child))
166 NR_ARENA_ITEM_VIRTUAL (item, remove_child) (item, child);
167 }
169 void
170 nr_arena_item_set_child_position (NRArenaItem *item, NRArenaItem *child,
171 NRArenaItem *ref)
172 {
173 nr_return_if_fail (item != NULL);
174 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
175 nr_return_if_fail (child != NULL);
176 nr_return_if_fail (NR_IS_ARENA_ITEM (child));
177 nr_return_if_fail (child->parent == item);
178 nr_return_if_fail (!ref || NR_IS_ARENA_ITEM (ref));
179 nr_return_if_fail (!ref || (ref->parent == item));
181 if (NR_ARENA_ITEM_VIRTUAL (item, set_child_position))
182 NR_ARENA_ITEM_VIRTUAL (item, set_child_position) (item, child, ref);
183 }
185 NRArenaItem *
186 nr_arena_item_ref (NRArenaItem *item)
187 {
188 nr_object_ref ((NRObject *) item);
190 return item;
191 }
193 NRArenaItem *
194 nr_arena_item_unref (NRArenaItem *item)
195 {
196 nr_object_unref ((NRObject *) item);
198 return NULL;
199 }
201 unsigned int
202 nr_arena_item_invoke_update (NRArenaItem *item, NRRectL *area, NRGC *gc,
203 unsigned int state, unsigned int reset)
204 {
205 NRGC childgc (gc);
207 nr_return_val_if_fail (item != NULL, NR_ARENA_ITEM_STATE_INVALID);
208 nr_return_val_if_fail (NR_IS_ARENA_ITEM (item),
209 NR_ARENA_ITEM_STATE_INVALID);
210 nr_return_val_if_fail (!(state & NR_ARENA_ITEM_STATE_INVALID),
211 NR_ARENA_ITEM_STATE_INVALID);
213 #ifdef NR_ARENA_ITEM_DEBUG_CASCADE
214 printf ("Update %s:%p %x %x %x\n",
215 nr_type_name_from_instance ((GTypeInstance *) item), item, state,
216 item->state, reset);
217 #endif
219 /* return if in error */
220 if (item->state & NR_ARENA_ITEM_STATE_INVALID)
221 return item->state;
222 /* Set reset flags according to propagation status */
223 if (item->propagate) {
224 reset |= ~item->state;
225 item->propagate = FALSE;
226 }
227 /* Reset our state */
228 item->state &= ~reset;
229 /* Return if NOP */
230 if (!(~item->state & state))
231 return item->state;
232 /* Test whether to return immediately */
233 if (area && (item->state & NR_ARENA_ITEM_STATE_BBOX)) {
234 if (!nr_rect_l_test_intersect (area, &item->bbox))
235 return item->state;
236 }
238 /* Reset image cache, if not to be kept */
239 if (!(item->state & NR_ARENA_ITEM_STATE_IMAGE) && (item->px)) {
240 item->px = NULL;
241 }
243 /* Set up local gc */
244 childgc = *gc;
245 if (item->transform) {
246 nr_matrix_multiply (&childgc.transform, item->transform,
247 &childgc.transform);
248 }
249 /* Remember the transformation matrix */
250 item->ctm = childgc.transform;
252 /* Invoke the real method */
253 item->state =
254 NR_ARENA_ITEM_VIRTUAL (item, update) (item, area, &childgc, state,
255 reset);
256 if (item->state & NR_ARENA_ITEM_STATE_INVALID)
257 return item->state;
258 /* Enlarge the bounding box to contain filter effects */
259 if (item->filter) {
260 item->filter->bbox_enlarge (item->bbox);
261 }
263 /* Clipping */
264 if (item->clip) {
265 // FIXME: since here we only need bbox, consider passing
266 // ((state & !(NR_ARENA_ITEM_STATE_RENDER)) | NR_ARENA_ITEM_STATE_BBOX)
267 // instead of state, so it does not have to create rendering structures in nr_arena_shape_update
268 unsigned int newstate = nr_arena_item_invoke_update (item->clip, area, &childgc, state, reset);
269 if (newstate & NR_ARENA_ITEM_STATE_INVALID) {
270 item->state |= NR_ARENA_ITEM_STATE_INVALID;
271 return item->state;
272 }
273 nr_rect_l_intersect (&item->bbox, &item->bbox, &item->clip->bbox);
274 }
275 /* Masking */
276 if (item->mask) {
277 unsigned int newstate = nr_arena_item_invoke_update (item->mask, area, &childgc, state, reset);
278 if (newstate & NR_ARENA_ITEM_STATE_INVALID) {
279 item->state |= NR_ARENA_ITEM_STATE_INVALID;
280 return item->state;
281 }
282 nr_rect_l_intersect (&item->bbox, &item->bbox, &item->mask->bbox);
283 }
285 return item->state;
286 }
288 /**
289 * Render item to pixblock.
290 *
291 * \return Has NR_ARENA_ITEM_STATE_RENDER set on success.
292 */
294 unsigned int
295 nr_arena_item_invoke_render (NRArenaItem *item, NRRectL const *area,
296 NRPixBlock *pb, unsigned int flags)
297 {
298 bool outline = (item->arena->rendermode == RENDERMODE_OUTLINE);
300 nr_return_val_if_fail (item != NULL, NR_ARENA_ITEM_STATE_INVALID);
301 nr_return_val_if_fail (NR_IS_ARENA_ITEM (item),
302 NR_ARENA_ITEM_STATE_INVALID);
303 nr_return_val_if_fail (item->state & NR_ARENA_ITEM_STATE_BBOX,
304 item->state);
306 #ifdef NR_ARENA_ITEM_VERBOSE
307 printf ("Invoke render %p: %d %d - %d %d\n", item, area->x0, area->y0,
308 area->x1, area->y1);
309 #endif
311 /* If we are outside bbox just return successfully */
312 if (!item->visible)
313 return item->state | NR_ARENA_ITEM_STATE_RENDER;
315 NRRectL carea;
316 nr_rect_l_intersect (&carea, area, &item->bbox);
317 if (nr_rect_l_test_empty (&carea))
318 return item->state | NR_ARENA_ITEM_STATE_RENDER;
319 if (item->filter && !outline) {
320 nr_rect_l_enlarge (&carea, item->filter->get_enlarge (item->ctm));
321 nr_rect_l_intersect (&carea, &carea, &item->bbox);
322 }
324 NRPixBlock cpb;
325 if (item->px) {
326 /* Has cache pixblock, render this and return */
327 nr_pixblock_setup_extern (&cpb, NR_PIXBLOCK_MODE_R8G8B8A8P,
328 /* fixme: This probably cannot overflow, because we render only if visible */
329 /* fixme: and pixel cache is there only for small items */
330 /* fixme: But this still needs extra check (Lauris) */
331 item->bbox.x0, item->bbox.y0,
332 item->bbox.x1, item->bbox.y1,
333 item->px,
334 4 * (item->bbox.x1 - item->bbox.x0), FALSE,
335 FALSE);
336 nr_blit_pixblock_pixblock (pb, &cpb);
337 nr_pixblock_release (&cpb);
338 pb->empty = FALSE;
339 return item->state | NR_ARENA_ITEM_STATE_RENDER;
340 }
342 NRPixBlock *dpb = pb;
344 /* Setup cache if we can */
345 if ((!(flags & NR_ARENA_ITEM_RENDER_NO_CACHE)) &&
346 (carea.x0 <= item->bbox.x0) && (carea.y0 <= item->bbox.y0) &&
347 (carea.x1 >= item->bbox.x1) && (carea.y1 >= item->bbox.y1) &&
348 (((item->bbox.x1 - item->bbox.x0) * (item->bbox.y1 -
349 item->bbox.y0)) <= 4096)) {
350 // Item bbox is fully in renderable area and size is acceptable
351 carea.x0 = item->bbox.x0;
352 carea.y0 = item->bbox.y0;
353 carea.x1 = item->bbox.x1;
354 carea.y1 = item->bbox.y1;
355 item->px =
356 new (GC::ATOMIC) unsigned char[4 * (carea.x1 - carea.x0) *
357 (carea.y1 - carea.y0)];
358 nr_pixblock_setup_extern (&cpb, NR_PIXBLOCK_MODE_R8G8B8A8P, carea.x0,
359 carea.y0, carea.x1, carea.y1, item->px,
360 4 * (carea.x1 - carea.x0), TRUE, TRUE);
361 cpb.visible_area = pb->visible_area;
362 dpb = &cpb;
363 // Set nocache flag for downstream rendering
364 flags |= NR_ARENA_ITEM_RENDER_NO_CACHE;
365 }
367 /* Determine, whether we need temporary buffer */
368 if (item->clip || item->mask
369 || ((item->opacity != 255) && !item->render_opacity && !outline)
370 || (item->filter && !outline) || item->background_new
371 || (item->parent && item->parent->background_pb)) {
373 /* Setup and render item buffer */
374 NRPixBlock ipb;
375 nr_pixblock_setup_fast (&ipb, NR_PIXBLOCK_MODE_R8G8B8A8P,
376 carea.x0, carea.y0, carea.x1, carea.y1,
377 TRUE);
379 // if memory allocation failed, abort render
380 if (ipb.size != NR_PIXBLOCK_SIZE_TINY && ipb.data.px == NULL) {
381 nr_pixblock_release (&ipb);
382 return (item->state);
383 }
385 /* If background access is used, save the pixblock address.
386 * This address is set to NULL at the end of this block */
387 if (item->background_new
388 || (item->parent && item->parent->background_pb)) {
389 item->background_pb = &ipb;
390 }
391 ipb.visible_area = pb->visible_area;
392 unsigned int state = NR_ARENA_ITEM_VIRTUAL (item, render) (item, &carea, &ipb, flags);
393 if (state & NR_ARENA_ITEM_STATE_INVALID) {
394 /* Clean up and return error */
395 nr_pixblock_release (&ipb);
396 if (dpb != pb)
397 nr_pixblock_release (dpb);
398 item->state |= NR_ARENA_ITEM_STATE_INVALID;
399 return item->state;
400 }
401 ipb.empty = FALSE;
403 /* Run filtering, if a filter is set for this object */
404 if (item->filter && !outline) {
405 item->filter->render (item, &ipb);
406 }
408 if ((item->clip || item->mask) && !outline) {
409 /* Setup mask pixblock */
410 NRPixBlock mpb;
411 nr_pixblock_setup_fast (&mpb, NR_PIXBLOCK_MODE_A8, carea.x0,
412 carea.y0, carea.x1, carea.y1, TRUE);
414 if (mpb.data.px != NULL) { // if memory allocation was successful
416 mpb.visible_area = pb->visible_area;
417 /* Do clip if needed */
418 if (item->clip) {
419 state = nr_arena_item_invoke_clip (item->clip, &carea, &mpb);
420 if (state & NR_ARENA_ITEM_STATE_INVALID) {
421 /* Clean up and return error */
422 nr_pixblock_release (&mpb);
423 nr_pixblock_release (&ipb);
424 if (dpb != pb)
425 nr_pixblock_release (dpb);
426 item->state |= NR_ARENA_ITEM_STATE_INVALID;
427 return item->state;
428 }
429 mpb.empty = FALSE;
430 }
431 /* Do mask if needed */
432 if (item->mask) {
433 NRPixBlock tpb;
434 /* Set up yet another temporary pixblock */
435 nr_pixblock_setup_fast (&tpb, NR_PIXBLOCK_MODE_R8G8B8A8N,
436 carea.x0, carea.y0, carea.x1,
437 carea.y1, TRUE);
439 if (tpb.data.px != NULL) { // if memory allocation was successful
441 tpb.visible_area = pb->visible_area;
442 unsigned int state = NR_ARENA_ITEM_VIRTUAL (item->mask, render) (item->mask, &carea, &tpb, flags);
443 if (state & NR_ARENA_ITEM_STATE_INVALID) {
444 /* Clean up and return error */
445 nr_pixblock_release (&tpb);
446 nr_pixblock_release (&mpb);
447 nr_pixblock_release (&ipb);
448 if (dpb != pb)
449 nr_pixblock_release (dpb);
450 item->state |= NR_ARENA_ITEM_STATE_INVALID;
451 return item->state;
452 }
453 /* Composite with clip */
454 if (item->clip) {
455 int x, y;
456 for (y = carea.y0; y < carea.y1; y++) {
457 unsigned char *s, *d;
458 s = NR_PIXBLOCK_PX (&tpb) + (y -
459 carea.y0) * tpb.rs;
460 d = NR_PIXBLOCK_PX (&mpb) + (y -
461 carea.y0) * mpb.rs;
462 for (x = carea.x0; x < carea.x1; x++) {
463 unsigned int m;
464 m = NR_PREMUL_112 (s[0] + s[1] + s[2], s[3]);
465 d[0] =
466 FAST_DIV_ROUND < 3 * 255 * 255 >
467 (NR_PREMUL_123 (d[0], m));
468 s += 4;
469 d += 1;
470 }
471 }
472 } else {
473 int x, y;
474 for (y = carea.y0; y < carea.y1; y++) {
475 unsigned char *s, *d;
476 s = NR_PIXBLOCK_PX (&tpb) + (y -
477 carea.y0) * tpb.rs;
478 d = NR_PIXBLOCK_PX (&mpb) + (y -
479 carea.y0) * mpb.rs;
480 for (x = carea.x0; x < carea.x1; x++) {
481 unsigned int m;
482 m = NR_PREMUL_112 (s[0] + s[1] + s[2], s[3]);
483 d[0] = FAST_DIV_ROUND < 3 * 255 > (m);
484 s += 4;
485 d += 1;
486 }
487 }
488 mpb.empty = FALSE;
489 }
490 }
491 nr_pixblock_release (&tpb);
492 }
493 /* Multiply with opacity if needed */
494 if ((item->opacity != 255) && !item->render_opacity
495 && !outline) {
496 int x, y;
497 unsigned int a;
498 a = item->opacity;
499 for (y = carea.y0; y < carea.y1; y++) {
500 unsigned char *d;
501 d = NR_PIXBLOCK_PX (&mpb) + (y - carea.y0) * mpb.rs;
502 for (x = carea.x0; x < carea.x1; x++) {
503 d[0] = NR_PREMUL_111 (d[0], a);
504 d += 1;
505 }
506 }
507 }
508 /* Compose rendering pixblock int destination */
509 nr_blit_pixblock_pixblock_mask (dpb, &ipb, &mpb);
510 }
511 nr_pixblock_release (&mpb);
512 /* This pointer wouldn't be valid outside this block, so clear it */
513 item->background_pb = NULL;
515 } else if ((item->clip || item->mask) && outline) {
516 // Render clipped or masked object in outline mode:
518 // First, render the object itself
519 unsigned int state = NR_ARENA_ITEM_VIRTUAL (item, render) (item, &carea, dpb, flags);
520 if (state & NR_ARENA_ITEM_STATE_INVALID) {
521 /* Clean up and return error */
522 if (dpb != pb)
523 nr_pixblock_release (dpb);
524 item->state |= NR_ARENA_ITEM_STATE_INVALID;
525 return item->state;
526 }
528 guint32 saved_rgba = item->arena->outlinecolor; // save current outline color
529 // render clippath as an object, using a different color
530 if (item->clip) {
531 item->arena->outlinecolor = prefs_get_int_attribute("options.wireframecolors", "clips", 0x00ff00ff); // green clips
532 NR_ARENA_ITEM_VIRTUAL (item->clip, render) (item->clip, &carea, dpb, flags);
533 }
534 // render mask as an object, using a different color
535 if (item->mask) {
536 item->arena->outlinecolor = prefs_get_int_attribute("options.wireframecolors", "masks", 0x0000ffff); // blue masks
537 NR_ARENA_ITEM_VIRTUAL (item->mask, render) (item->mask, &carea, dpb, flags);
538 }
539 item->arena->outlinecolor = saved_rgba; // restore outline color
541 } else {
542 if (item->render_opacity) { // opacity was already rendered in, just copy to dpb here
543 nr_blit_pixblock_pixblock(dpb, &ipb);
544 } else { // copy while multiplying by opacity
545 nr_blit_pixblock_pixblock_alpha (dpb, &ipb, item->opacity);
546 }
547 }
548 nr_pixblock_release (&ipb);
549 dpb->empty = FALSE;
550 } else {
551 /* Just render */
552 unsigned int state = NR_ARENA_ITEM_VIRTUAL (item, render) (item, &carea, dpb, flags);
553 if (state & NR_ARENA_ITEM_STATE_INVALID) {
554 /* Clean up and return error */
555 if (dpb != pb)
556 nr_pixblock_release (dpb);
557 item->state |= NR_ARENA_ITEM_STATE_INVALID;
558 return item->state;
559 }
560 dpb->empty = FALSE;
561 }
563 if (dpb != pb) {
564 /* Have to blit from cache */
565 nr_blit_pixblock_pixblock (pb, dpb);
566 nr_pixblock_release (dpb);
567 pb->empty = FALSE;
568 item->state |= NR_ARENA_ITEM_STATE_IMAGE;
569 }
571 return item->state | NR_ARENA_ITEM_STATE_RENDER;
572 }
574 unsigned int
575 nr_arena_item_invoke_clip (NRArenaItem *item, NRRectL *area, NRPixBlock *pb)
576 {
577 nr_return_val_if_fail (item != NULL, NR_ARENA_ITEM_STATE_INVALID);
578 nr_return_val_if_fail (NR_IS_ARENA_ITEM (item),
579 NR_ARENA_ITEM_STATE_INVALID);
580 /* we originally short-circuited if the object state included
581 * NR_ARENA_ITEM_STATE_CLIP (and showed a warning on the console);
582 * anyone know why we stopped doing so?
583 */
584 nr_return_val_if_fail ((pb->area.x1 - pb->area.x0) >=
585 (area->x1 - area->x0),
586 NR_ARENA_ITEM_STATE_INVALID);
587 nr_return_val_if_fail ((pb->area.y1 - pb->area.y0) >=
588 (area->y1 - area->y0),
589 NR_ARENA_ITEM_STATE_INVALID);
591 #ifdef NR_ARENA_ITEM_VERBOSE
592 printf ("Invoke clip by %p: %d %d - %d %d, item bbox %d %d - %d %d\n",
593 item, area->x0, area->y0, area->x1, area->y1, (&item->bbox)->x0,
594 (&item->bbox)->y0, (&item->bbox)->x1, (&item->bbox)->y1);
595 #endif
597 if (item->visible && nr_rect_l_test_intersect (area, &item->bbox)) {
598 /* Need render that item */
599 if (((NRArenaItemClass *) NR_OBJECT_GET_CLASS (item))->clip) {
600 return ((NRArenaItemClass *) NR_OBJECT_GET_CLASS (item))->
601 clip (item, area, pb);
602 }
603 }
605 return item->state;
606 }
608 NRArenaItem *
609 nr_arena_item_invoke_pick (NRArenaItem *item, NR::Point p, double delta,
610 unsigned int sticky)
611 {
612 nr_return_val_if_fail (item != NULL, NULL);
613 nr_return_val_if_fail (NR_IS_ARENA_ITEM (item), NULL);
615 // Sometimes there's no BBOX in item->state, reason unknown (bug 992817); I made this not an assert to remove the warning
616 if (!(item->state & NR_ARENA_ITEM_STATE_BBOX)
617 || !(item->state & NR_ARENA_ITEM_STATE_PICK))
618 return NULL;
620 if (!sticky && !(item->visible && item->sensitive))
621 return NULL;
623 // TODO: rewrite using NR::Rect
624 const double x = p[NR::X];
625 const double y = p[NR::Y];
627 if (((x + delta) >= item->bbox.x0) &&
628 ((x - delta) < item->bbox.x1) &&
629 ((y + delta) >= item->bbox.y0) && ((y - delta) < item->bbox.y1)) {
630 if (((NRArenaItemClass *) NR_OBJECT_GET_CLASS (item))->pick)
631 return ((NRArenaItemClass *) NR_OBJECT_GET_CLASS (item))->
632 pick (item, p, delta, sticky);
633 }
635 return NULL;
636 }
638 void
639 nr_arena_item_request_update (NRArenaItem *item, unsigned int reset,
640 unsigned int propagate)
641 {
642 nr_return_if_fail (item != NULL);
643 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
644 nr_return_if_fail (!(reset & NR_ARENA_ITEM_STATE_INVALID));
646 if (propagate && !item->propagate)
647 item->propagate = TRUE;
649 if (item->state & reset) {
650 item->state &= ~reset;
651 if (item->parent) {
652 nr_arena_item_request_update (item->parent, reset, FALSE);
653 } else {
654 nr_arena_request_update (item->arena, item);
655 }
656 }
657 }
659 void
660 nr_arena_item_request_render (NRArenaItem *item)
661 {
662 nr_return_if_fail (item != NULL);
663 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
665 nr_arena_request_render_rect (item->arena, &item->bbox);
666 }
668 /* Public */
670 NRArenaItem *
671 nr_arena_item_unparent (NRArenaItem *item)
672 {
673 nr_return_val_if_fail (item != NULL, NULL);
674 nr_return_val_if_fail (NR_IS_ARENA_ITEM (item), NULL);
676 nr_arena_item_request_render (item);
678 if (item->parent) {
679 nr_arena_item_remove_child (item->parent, item);
680 }
682 return NULL;
683 }
685 void
686 nr_arena_item_append_child (NRArenaItem *parent, NRArenaItem *child)
687 {
688 nr_return_if_fail (parent != NULL);
689 nr_return_if_fail (NR_IS_ARENA_ITEM (parent));
690 nr_return_if_fail (child != NULL);
691 nr_return_if_fail (NR_IS_ARENA_ITEM (child));
692 nr_return_if_fail (parent->arena == child->arena);
693 nr_return_if_fail (child->parent == NULL);
694 nr_return_if_fail (child->prev == NULL);
695 nr_return_if_fail (child->next == NULL);
697 nr_arena_item_add_child (parent, child, nr_arena_item_last_child (parent));
698 }
700 void
701 nr_arena_item_set_transform (NRArenaItem *item, NR::Matrix const &transform)
702 {
703 NRMatrix const t (transform);
704 nr_arena_item_set_transform (item, &t);
705 }
707 void
708 nr_arena_item_set_transform (NRArenaItem *item, NRMatrix const *transform)
709 {
710 nr_return_if_fail (item != NULL);
711 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
713 if (!transform && !item->transform)
714 return;
716 const NRMatrix *md = (item->transform) ? item->transform : &NR_MATRIX_IDENTITY;
717 const NRMatrix *ms = (transform) ? transform : &NR_MATRIX_IDENTITY;
719 if (!NR_MATRIX_DF_TEST_CLOSE (md, ms, NR_EPSILON)) {
720 nr_arena_item_request_render (item);
721 if (!transform || nr_matrix_test_identity (transform, NR_EPSILON)) {
722 /* Set to identity affine */
723 item->transform = NULL;
724 } else {
725 if (!item->transform)
726 item->transform = new (GC::ATOMIC) NRMatrix ();
727 *item->transform = *transform;
728 }
729 nr_arena_item_request_update (item, NR_ARENA_ITEM_STATE_ALL, TRUE);
730 }
731 }
733 void
734 nr_arena_item_set_opacity (NRArenaItem *item, double opacity)
735 {
736 nr_return_if_fail (item != NULL);
737 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
739 nr_arena_item_request_render (item);
741 item->opacity = (unsigned int) (opacity * 255.9999);
742 }
744 void
745 nr_arena_item_set_sensitive (NRArenaItem *item, unsigned int sensitive)
746 {
747 nr_return_if_fail (item != NULL);
748 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
750 /* fixme: mess with pick/repick... */
752 item->sensitive = sensitive;
753 }
755 void
756 nr_arena_item_set_visible (NRArenaItem *item, unsigned int visible)
757 {
758 nr_return_if_fail (item != NULL);
759 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
761 item->visible = visible;
763 nr_arena_item_request_render (item);
764 }
766 void
767 nr_arena_item_set_clip (NRArenaItem *item, NRArenaItem *clip)
768 {
769 nr_return_if_fail (item != NULL);
770 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
771 nr_return_if_fail (!clip || NR_IS_ARENA_ITEM (clip));
773 if (clip != item->clip) {
774 nr_arena_item_request_render (item);
775 if (item->clip)
776 item->clip = nr_arena_item_detach (item, item->clip);
777 if (clip)
778 item->clip = nr_arena_item_attach (item, clip, NULL, NULL);
779 nr_arena_item_request_update (item, NR_ARENA_ITEM_STATE_ALL, TRUE);
780 }
781 }
783 void
784 nr_arena_item_set_mask (NRArenaItem *item, NRArenaItem *mask)
785 {
786 nr_return_if_fail (item != NULL);
787 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
788 nr_return_if_fail (!mask || NR_IS_ARENA_ITEM (mask));
790 if (mask != item->mask) {
791 nr_arena_item_request_render (item);
792 if (item->mask)
793 item->mask = nr_arena_item_detach (item, item->mask);
794 if (mask)
795 item->mask = nr_arena_item_attach (item, mask, NULL, NULL);
796 nr_arena_item_request_update (item, NR_ARENA_ITEM_STATE_ALL, TRUE);
797 }
798 }
800 void
801 nr_arena_item_set_order (NRArenaItem *item, int order)
802 {
803 nr_return_if_fail (item != NULL);
804 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
806 if (!item->parent)
807 return;
809 NRArenaItem *children = nr_arena_item_children (item->parent);
811 NRArenaItem *ref = NULL;
812 int pos = 0;
813 for (NRArenaItem *child = children; child != NULL; child = child->next) {
814 if (pos >= order)
815 break;
816 if (child != item) {
817 ref = child;
818 pos += 1;
819 }
820 }
822 nr_arena_item_set_child_position (item->parent, item, ref);
823 }
825 /** Returns a background image for use with filter effects. */
826 NRPixBlock *
827 nr_arena_item_get_background (NRArenaItem const *item, int depth)
828 {
829 NRPixBlock *pb;
830 if (!item->background_pb)
831 return NULL;
832 if (item->background_new) {
833 pb = new NRPixBlock ();
834 nr_pixblock_setup_fast (pb, item->background_pb->mode,
835 item->background_pb->area.x0,
836 item->background_pb->area.y0,
837 item->background_pb->area.x1,
838 item->background_pb->area.y1, true);
839 if (pb->size != NR_PIXBLOCK_SIZE_TINY && pb->data.px == NULL) // allocation failed
840 return NULL;
841 } else if (item->parent) {
842 pb = nr_arena_item_get_background (item->parent, depth + 1);
843 } else
844 return NULL;
846 if (depth > 0)
847 nr_blit_pixblock_pixblock (pb, item->background_pb);
849 return pb;
850 }
852 /* Helpers */
854 NRArenaItem *
855 nr_arena_item_attach (NRArenaItem *parent, NRArenaItem *child,
856 NRArenaItem *prev, NRArenaItem *next)
857 {
858 nr_return_val_if_fail (parent != NULL, NULL);
859 nr_return_val_if_fail (NR_IS_ARENA_ITEM (parent), NULL);
860 nr_return_val_if_fail (child != NULL, NULL);
861 nr_return_val_if_fail (NR_IS_ARENA_ITEM (child), NULL);
862 nr_return_val_if_fail (child->parent == NULL, NULL);
863 nr_return_val_if_fail (child->prev == NULL, NULL);
864 nr_return_val_if_fail (child->next == NULL, NULL);
865 nr_return_val_if_fail (!prev || NR_IS_ARENA_ITEM (prev), NULL);
866 nr_return_val_if_fail (!prev || (prev->parent == parent), NULL);
867 nr_return_val_if_fail (!prev || (prev->next == next), NULL);
868 nr_return_val_if_fail (!next || NR_IS_ARENA_ITEM (next), NULL);
869 nr_return_val_if_fail (!next || (next->parent == parent), NULL);
870 nr_return_val_if_fail (!next || (next->prev == prev), NULL);
872 child->parent = parent;
873 child->prev = prev;
874 child->next = next;
876 if (prev)
877 prev->next = child;
878 if (next)
879 next->prev = child;
881 return child;
882 }
884 NRArenaItem *
885 nr_arena_item_detach (NRArenaItem *parent, NRArenaItem *child)
886 {
887 nr_return_val_if_fail (parent != NULL, NULL);
888 nr_return_val_if_fail (NR_IS_ARENA_ITEM (parent), NULL);
889 nr_return_val_if_fail (child != NULL, NULL);
890 nr_return_val_if_fail (NR_IS_ARENA_ITEM (child), NULL);
891 nr_return_val_if_fail (child->parent == parent, NULL);
893 NRArenaItem *prev = child->prev;
894 NRArenaItem *next = child->next;
896 child->parent = NULL;
897 child->prev = NULL;
898 child->next = NULL;
900 if (prev)
901 prev->next = next;
902 if (next)
903 next->prev = prev;
905 return next;
906 }
908 /*
909 Local Variables:
910 mode:c++
911 c-file-style:"stroustrup"
912 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
913 indent-tabs-mode:nil
914 fill-column:99
915 End:
916 */
917 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :