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 unsigned int newstate = nr_arena_item_invoke_update (item->clip, area, &childgc, state, reset);
266 if (newstate & NR_ARENA_ITEM_STATE_INVALID) {
267 item->state |= NR_ARENA_ITEM_STATE_INVALID;
268 return item->state;
269 }
270 nr_rect_l_intersect (&item->bbox, &item->bbox, &item->clip->bbox);
271 }
272 /* Masking */
273 if (item->mask) {
274 unsigned int newstate = nr_arena_item_invoke_update (item->mask, area, &childgc, state, reset);
275 if (newstate & NR_ARENA_ITEM_STATE_INVALID) {
276 item->state |= NR_ARENA_ITEM_STATE_INVALID;
277 return item->state;
278 }
279 nr_rect_l_intersect (&item->bbox, &item->bbox, &item->mask->bbox);
280 }
282 return item->state;
283 }
285 /**
286 * Render item to pixblock.
287 *
288 * \return Has NR_ARENA_ITEM_STATE_RENDER set on success.
289 */
291 unsigned int
292 nr_arena_item_invoke_render (NRArenaItem *item, NRRectL const *area,
293 NRPixBlock *pb, unsigned int flags)
294 {
295 bool outline = (item->arena->rendermode == RENDERMODE_OUTLINE);
297 nr_return_val_if_fail (item != NULL, NR_ARENA_ITEM_STATE_INVALID);
298 nr_return_val_if_fail (NR_IS_ARENA_ITEM (item),
299 NR_ARENA_ITEM_STATE_INVALID);
300 nr_return_val_if_fail (item->state & NR_ARENA_ITEM_STATE_BBOX,
301 item->state);
303 #ifdef NR_ARENA_ITEM_VERBOSE
304 printf ("Invoke render %p: %d %d - %d %d\n", item, area->x0, area->y0,
305 area->x1, area->y1);
306 #endif
308 /* If we are outside bbox just return successfully */
309 if (!item->visible)
310 return item->state | NR_ARENA_ITEM_STATE_RENDER;
312 NRRectL carea;
313 nr_rect_l_intersect (&carea, area, &item->bbox);
314 if (nr_rect_l_test_empty (&carea))
315 return item->state | NR_ARENA_ITEM_STATE_RENDER;
316 if (item->filter && !outline) {
317 nr_rect_l_enlarge (&carea, item->filter->get_enlarge (item->ctm));
318 nr_rect_l_intersect (&carea, &carea, &item->bbox);
319 }
321 NRPixBlock cpb;
322 if (item->px) {
323 /* Has cache pixblock, render this and return */
324 nr_pixblock_setup_extern (&cpb, NR_PIXBLOCK_MODE_R8G8B8A8P,
325 /* fixme: This probably cannot overflow, because we render only if visible */
326 /* fixme: and pixel cache is there only for small items */
327 /* fixme: But this still needs extra check (Lauris) */
328 item->bbox.x0, item->bbox.y0,
329 item->bbox.x1, item->bbox.y1,
330 item->px,
331 4 * (item->bbox.x1 - item->bbox.x0), FALSE,
332 FALSE);
333 nr_blit_pixblock_pixblock (pb, &cpb);
334 nr_pixblock_release (&cpb);
335 pb->empty = FALSE;
336 return item->state | NR_ARENA_ITEM_STATE_RENDER;
337 }
339 NRPixBlock *dpb = pb;
341 /* Setup cache if we can */
342 if ((!(flags & NR_ARENA_ITEM_RENDER_NO_CACHE)) &&
343 (carea.x0 <= item->bbox.x0) && (carea.y0 <= item->bbox.y0) &&
344 (carea.x1 >= item->bbox.x1) && (carea.y1 >= item->bbox.y1) &&
345 (((item->bbox.x1 - item->bbox.x0) * (item->bbox.y1 -
346 item->bbox.y0)) <= 4096)) {
347 // Item bbox is fully in renderable area and size is acceptable
348 carea.x0 = item->bbox.x0;
349 carea.y0 = item->bbox.y0;
350 carea.x1 = item->bbox.x1;
351 carea.y1 = item->bbox.y1;
352 item->px =
353 new (GC::ATOMIC) unsigned char[4 * (carea.x1 - carea.x0) *
354 (carea.y1 - carea.y0)];
355 nr_pixblock_setup_extern (&cpb, NR_PIXBLOCK_MODE_R8G8B8A8P, carea.x0,
356 carea.y0, carea.x1, carea.y1, item->px,
357 4 * (carea.x1 - carea.x0), TRUE, TRUE);
358 cpb.visible_area = pb->visible_area;
359 dpb = &cpb;
360 // Set nocache flag for downstream rendering
361 flags |= NR_ARENA_ITEM_RENDER_NO_CACHE;
362 }
364 /* Determine, whether we need temporary buffer */
365 if (item->clip || item->mask
366 || ((item->opacity != 255) && !item->render_opacity && !outline)
367 || (item->filter && !outline) || item->background_new
368 || (item->parent && item->parent->background_pb)) {
370 /* Setup and render item buffer */
371 NRPixBlock ipb;
372 nr_pixblock_setup_fast (&ipb, NR_PIXBLOCK_MODE_R8G8B8A8P,
373 carea.x0, carea.y0, carea.x1, carea.y1,
374 TRUE);
376 // if memory allocation failed, abort render
377 if (ipb.data.px == NULL) {
378 nr_pixblock_release (&ipb);
379 return (item->state);
380 }
382 /* If background access is used, save the pixblock address.
383 * This address is set to NULL at the end of this block */
384 if (item->background_new
385 || (item->parent && item->parent->background_pb)) {
386 item->background_pb = &ipb;
387 }
388 ipb.visible_area = pb->visible_area;
389 unsigned int state = NR_ARENA_ITEM_VIRTUAL (item, render) (item, &carea, &ipb, flags);
390 if (state & NR_ARENA_ITEM_STATE_INVALID) {
391 /* Clean up and return error */
392 nr_pixblock_release (&ipb);
393 if (dpb != pb)
394 nr_pixblock_release (dpb);
395 item->state |= NR_ARENA_ITEM_STATE_INVALID;
396 return item->state;
397 }
398 ipb.empty = FALSE;
400 /* Run filtering, if a filter is set for this object */
401 if (item->filter && !outline) {
402 item->filter->render (item, &ipb);
403 }
405 if (item->clip || item->mask) {
406 /* Setup mask pixblock */
407 NRPixBlock mpb;
408 nr_pixblock_setup_fast (&mpb, NR_PIXBLOCK_MODE_A8, carea.x0,
409 carea.y0, carea.x1, carea.y1, TRUE);
411 if (mpb.data.px != NULL) { // if memory allocation was successful
413 mpb.visible_area = pb->visible_area;
414 /* Do clip if needed */
415 if (item->clip) {
416 state = nr_arena_item_invoke_clip (item->clip, &carea, &mpb);
417 if (state & NR_ARENA_ITEM_STATE_INVALID) {
418 /* Clean up and return error */
419 nr_pixblock_release (&mpb);
420 nr_pixblock_release (&ipb);
421 if (dpb != pb)
422 nr_pixblock_release (dpb);
423 item->state |= NR_ARENA_ITEM_STATE_INVALID;
424 return item->state;
425 }
426 mpb.empty = FALSE;
427 }
428 /* Do mask if needed */
429 if (item->mask) {
430 NRPixBlock tpb;
431 /* Set up yet another temporary pixblock */
432 nr_pixblock_setup_fast (&tpb, NR_PIXBLOCK_MODE_R8G8B8A8N,
433 carea.x0, carea.y0, carea.x1,
434 carea.y1, TRUE);
436 if (tpb.data.px != NULL) { // if memory allocation was successful
438 tpb.visible_area = pb->visible_area;
439 unsigned int state = NR_ARENA_ITEM_VIRTUAL (item->mask, render) (item->mask, &carea, &tpb, flags);
440 if (state & NR_ARENA_ITEM_STATE_INVALID) {
441 /* Clean up and return error */
442 nr_pixblock_release (&tpb);
443 nr_pixblock_release (&mpb);
444 nr_pixblock_release (&ipb);
445 if (dpb != pb)
446 nr_pixblock_release (dpb);
447 item->state |= NR_ARENA_ITEM_STATE_INVALID;
448 return item->state;
449 }
450 /* Composite with clip */
451 if (item->clip) {
452 int x, y;
453 for (y = carea.y0; y < carea.y1; y++) {
454 unsigned char *s, *d;
455 s = NR_PIXBLOCK_PX (&tpb) + (y -
456 carea.y0) * tpb.rs;
457 d = NR_PIXBLOCK_PX (&mpb) + (y -
458 carea.y0) * mpb.rs;
459 for (x = carea.x0; x < carea.x1; x++) {
460 unsigned int m;
461 m = NR_PREMUL_112 (s[0] + s[1] + s[2], s[3]);
462 d[0] =
463 FAST_DIV_ROUND < 3 * 255 * 255 >
464 (NR_PREMUL_123 (d[0], m));
465 s += 4;
466 d += 1;
467 }
468 }
469 } else {
470 int x, y;
471 for (y = carea.y0; y < carea.y1; y++) {
472 unsigned char *s, *d;
473 s = NR_PIXBLOCK_PX (&tpb) + (y -
474 carea.y0) * tpb.rs;
475 d = NR_PIXBLOCK_PX (&mpb) + (y -
476 carea.y0) * mpb.rs;
477 for (x = carea.x0; x < carea.x1; x++) {
478 unsigned int m;
479 m = NR_PREMUL_112 (s[0] + s[1] + s[2], s[3]);
480 d[0] = FAST_DIV_ROUND < 3 * 255 > (m);
481 s += 4;
482 d += 1;
483 }
484 }
485 mpb.empty = FALSE;
486 }
487 }
488 nr_pixblock_release (&tpb);
489 }
490 /* Multiply with opacity if needed */
491 if ((item->opacity != 255) && !item->render_opacity
492 && !outline) {
493 int x, y;
494 unsigned int a;
495 a = item->opacity;
496 for (y = carea.y0; y < carea.y1; y++) {
497 unsigned char *d;
498 d = NR_PIXBLOCK_PX (&mpb) + (y - carea.y0) * mpb.rs;
499 for (x = carea.x0; x < carea.x1; x++) {
500 d[0] = NR_PREMUL_111 (d[0], a);
501 d += 1;
502 }
503 }
504 }
505 /* Compose rendering pixblock int destination */
506 nr_blit_pixblock_pixblock_mask (dpb, &ipb, &mpb);
507 }
508 nr_pixblock_release (&mpb);
509 /* This pointer wouldn't be valid outside this block, so clear it */
510 item->background_pb = NULL;
511 } else {
512 if (item->render_opacity) { // opacity was already rendered in, just copy to dpb here
513 nr_blit_pixblock_pixblock(dpb, &ipb);
514 } else { // copy while multiplying by opacity
515 nr_blit_pixblock_pixblock_alpha (dpb, &ipb, item->opacity);
516 }
517 }
518 nr_pixblock_release (&ipb);
519 dpb->empty = FALSE;
520 } else {
521 /* Just render */
522 unsigned int state = NR_ARENA_ITEM_VIRTUAL (item, render) (item, &carea, dpb, flags);
523 if (state & NR_ARENA_ITEM_STATE_INVALID) {
524 /* Clean up and return error */
525 if (dpb != pb)
526 nr_pixblock_release (dpb);
527 item->state |= NR_ARENA_ITEM_STATE_INVALID;
528 return item->state;
529 }
530 dpb->empty = FALSE;
531 }
533 if (dpb != pb) {
534 /* Have to blit from cache */
535 nr_blit_pixblock_pixblock (pb, dpb);
536 nr_pixblock_release (dpb);
537 pb->empty = FALSE;
538 item->state |= NR_ARENA_ITEM_STATE_IMAGE;
539 }
541 return item->state | NR_ARENA_ITEM_STATE_RENDER;
542 }
544 unsigned int
545 nr_arena_item_invoke_clip (NRArenaItem *item, NRRectL *area, NRPixBlock *pb)
546 {
547 nr_return_val_if_fail (item != NULL, NR_ARENA_ITEM_STATE_INVALID);
548 nr_return_val_if_fail (NR_IS_ARENA_ITEM (item),
549 NR_ARENA_ITEM_STATE_INVALID);
550 /* we originally short-circuited if the object state included
551 * NR_ARENA_ITEM_STATE_CLIP (and showed a warning on the console);
552 * anyone know why we stopped doing so?
553 */
554 nr_return_val_if_fail ((pb->area.x1 - pb->area.x0) >=
555 (area->x1 - area->x0),
556 NR_ARENA_ITEM_STATE_INVALID);
557 nr_return_val_if_fail ((pb->area.y1 - pb->area.y0) >=
558 (area->y1 - area->y0),
559 NR_ARENA_ITEM_STATE_INVALID);
561 #ifdef NR_ARENA_ITEM_VERBOSE
562 printf ("Invoke clip by %p: %d %d - %d %d, item bbox %d %d - %d %d\n",
563 item, area->x0, area->y0, area->x1, area->y1, (&item->bbox)->x0,
564 (&item->bbox)->y0, (&item->bbox)->x1, (&item->bbox)->y1);
565 #endif
567 if (item->visible && nr_rect_l_test_intersect (area, &item->bbox)) {
568 /* Need render that item */
569 if (((NRArenaItemClass *) NR_OBJECT_GET_CLASS (item))->clip) {
570 return ((NRArenaItemClass *) NR_OBJECT_GET_CLASS (item))->
571 clip (item, area, pb);
572 }
573 }
575 return item->state;
576 }
578 NRArenaItem *
579 nr_arena_item_invoke_pick (NRArenaItem *item, NR::Point p, double delta,
580 unsigned int sticky)
581 {
582 nr_return_val_if_fail (item != NULL, NULL);
583 nr_return_val_if_fail (NR_IS_ARENA_ITEM (item), NULL);
585 // Sometimes there's no BBOX in item->state, reason unknown (bug 992817); I made this not an assert to remove the warning
586 if (!(item->state & NR_ARENA_ITEM_STATE_BBOX)
587 || !(item->state & NR_ARENA_ITEM_STATE_PICK))
588 return NULL;
590 if (!sticky && !(item->visible && item->sensitive))
591 return NULL;
593 // TODO: rewrite using NR::Rect
594 const double x = p[NR::X];
595 const double y = p[NR::Y];
597 if (((x + delta) >= item->bbox.x0) &&
598 ((x - delta) < item->bbox.x1) &&
599 ((y + delta) >= item->bbox.y0) && ((y - delta) < item->bbox.y1)) {
600 if (((NRArenaItemClass *) NR_OBJECT_GET_CLASS (item))->pick)
601 return ((NRArenaItemClass *) NR_OBJECT_GET_CLASS (item))->
602 pick (item, p, delta, sticky);
603 }
605 return NULL;
606 }
608 void
609 nr_arena_item_request_update (NRArenaItem *item, unsigned int reset,
610 unsigned int propagate)
611 {
612 nr_return_if_fail (item != NULL);
613 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
614 nr_return_if_fail (!(reset & NR_ARENA_ITEM_STATE_INVALID));
616 if (propagate && !item->propagate)
617 item->propagate = TRUE;
619 if (item->state & reset) {
620 item->state &= ~reset;
621 if (item->parent) {
622 nr_arena_item_request_update (item->parent, reset, FALSE);
623 } else {
624 nr_arena_request_update (item->arena, item);
625 }
626 }
627 }
629 void
630 nr_arena_item_request_render (NRArenaItem *item)
631 {
632 nr_return_if_fail (item != NULL);
633 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
635 nr_arena_request_render_rect (item->arena, &item->bbox);
636 }
638 /* Public */
640 NRArenaItem *
641 nr_arena_item_unparent (NRArenaItem *item)
642 {
643 nr_return_val_if_fail (item != NULL, NULL);
644 nr_return_val_if_fail (NR_IS_ARENA_ITEM (item), NULL);
646 nr_arena_item_request_render (item);
648 if (item->parent) {
649 nr_arena_item_remove_child (item->parent, item);
650 }
652 return NULL;
653 }
655 void
656 nr_arena_item_append_child (NRArenaItem *parent, NRArenaItem *child)
657 {
658 nr_return_if_fail (parent != NULL);
659 nr_return_if_fail (NR_IS_ARENA_ITEM (parent));
660 nr_return_if_fail (child != NULL);
661 nr_return_if_fail (NR_IS_ARENA_ITEM (child));
662 nr_return_if_fail (parent->arena == child->arena);
663 nr_return_if_fail (child->parent == NULL);
664 nr_return_if_fail (child->prev == NULL);
665 nr_return_if_fail (child->next == NULL);
667 nr_arena_item_add_child (parent, child, nr_arena_item_last_child (parent));
668 }
670 void
671 nr_arena_item_set_transform (NRArenaItem *item, NR::Matrix const &transform)
672 {
673 NRMatrix const t (transform);
674 nr_arena_item_set_transform (item, &t);
675 }
677 void
678 nr_arena_item_set_transform (NRArenaItem *item, NRMatrix const *transform)
679 {
680 nr_return_if_fail (item != NULL);
681 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
683 if (!transform && !item->transform)
684 return;
686 const NRMatrix *md = (item->transform) ? item->transform : &NR_MATRIX_IDENTITY;
687 const NRMatrix *ms = (transform) ? transform : &NR_MATRIX_IDENTITY;
689 if (!NR_MATRIX_DF_TEST_CLOSE (md, ms, NR_EPSILON)) {
690 nr_arena_item_request_render (item);
691 if (!transform || nr_matrix_test_identity (transform, NR_EPSILON)) {
692 /* Set to identity affine */
693 item->transform = NULL;
694 } else {
695 if (!item->transform)
696 item->transform = new (GC::ATOMIC) NRMatrix ();
697 *item->transform = *transform;
698 }
699 nr_arena_item_request_update (item, NR_ARENA_ITEM_STATE_ALL, TRUE);
700 }
701 }
703 void
704 nr_arena_item_set_opacity (NRArenaItem *item, double opacity)
705 {
706 nr_return_if_fail (item != NULL);
707 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
709 nr_arena_item_request_render (item);
711 item->opacity = (unsigned int) (opacity * 255.9999);
712 }
714 void
715 nr_arena_item_set_sensitive (NRArenaItem *item, unsigned int sensitive)
716 {
717 nr_return_if_fail (item != NULL);
718 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
720 /* fixme: mess with pick/repick... */
722 item->sensitive = sensitive;
723 }
725 void
726 nr_arena_item_set_visible (NRArenaItem *item, unsigned int visible)
727 {
728 nr_return_if_fail (item != NULL);
729 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
731 item->visible = visible;
733 nr_arena_item_request_render (item);
734 }
736 void
737 nr_arena_item_set_clip (NRArenaItem *item, NRArenaItem *clip)
738 {
739 nr_return_if_fail (item != NULL);
740 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
741 nr_return_if_fail (!clip || NR_IS_ARENA_ITEM (clip));
743 if (clip != item->clip) {
744 nr_arena_item_request_render (item);
745 if (item->clip)
746 item->clip = nr_arena_item_detach (item, item->clip);
747 if (clip)
748 item->clip = nr_arena_item_attach (item, clip, NULL, NULL);
749 nr_arena_item_request_update (item, NR_ARENA_ITEM_STATE_ALL, TRUE);
750 }
751 }
753 void
754 nr_arena_item_set_mask (NRArenaItem *item, NRArenaItem *mask)
755 {
756 nr_return_if_fail (item != NULL);
757 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
758 nr_return_if_fail (!mask || NR_IS_ARENA_ITEM (mask));
760 if (mask != item->mask) {
761 nr_arena_item_request_render (item);
762 if (item->mask)
763 item->mask = nr_arena_item_detach (item, item->mask);
764 if (mask)
765 item->mask = nr_arena_item_attach (item, mask, NULL, NULL);
766 nr_arena_item_request_update (item, NR_ARENA_ITEM_STATE_ALL, TRUE);
767 }
768 }
770 void
771 nr_arena_item_set_order (NRArenaItem *item, int order)
772 {
773 nr_return_if_fail (item != NULL);
774 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
776 if (!item->parent)
777 return;
779 NRArenaItem *children = nr_arena_item_children (item->parent);
781 NRArenaItem *ref = NULL;
782 int pos = 0;
783 for (NRArenaItem *child = children; child != NULL; child = child->next) {
784 if (pos >= order)
785 break;
786 if (child != item) {
787 ref = child;
788 pos += 1;
789 }
790 }
792 nr_arena_item_set_child_position (item->parent, item, ref);
793 }
795 /** Returns a background image for use with filter effects. */
796 NRPixBlock *
797 nr_arena_item_get_background (NRArenaItem const *item, int depth)
798 {
799 NRPixBlock *pb;
800 if (!item->background_pb)
801 return NULL;
802 if (item->background_new) {
803 pb = new NRPixBlock ();
804 nr_pixblock_setup_fast (pb, item->background_pb->mode,
805 item->background_pb->area.x0,
806 item->background_pb->area.y0,
807 item->background_pb->area.x1,
808 item->background_pb->area.y1, true);
809 if (pb->data.px == NULL) // allocation failed
810 return NULL;
811 } else if (item->parent) {
812 pb = nr_arena_item_get_background (item->parent, depth + 1);
813 } else
814 return NULL;
816 if (depth > 0)
817 nr_blit_pixblock_pixblock (pb, item->background_pb);
819 return pb;
820 }
822 /* Helpers */
824 NRArenaItem *
825 nr_arena_item_attach (NRArenaItem *parent, NRArenaItem *child,
826 NRArenaItem *prev, NRArenaItem *next)
827 {
828 nr_return_val_if_fail (parent != NULL, NULL);
829 nr_return_val_if_fail (NR_IS_ARENA_ITEM (parent), NULL);
830 nr_return_val_if_fail (child != NULL, NULL);
831 nr_return_val_if_fail (NR_IS_ARENA_ITEM (child), NULL);
832 nr_return_val_if_fail (child->parent == NULL, NULL);
833 nr_return_val_if_fail (child->prev == NULL, NULL);
834 nr_return_val_if_fail (child->next == NULL, NULL);
835 nr_return_val_if_fail (!prev || NR_IS_ARENA_ITEM (prev), NULL);
836 nr_return_val_if_fail (!prev || (prev->parent == parent), NULL);
837 nr_return_val_if_fail (!prev || (prev->next == next), NULL);
838 nr_return_val_if_fail (!next || NR_IS_ARENA_ITEM (next), NULL);
839 nr_return_val_if_fail (!next || (next->parent == parent), NULL);
840 nr_return_val_if_fail (!next || (next->prev == prev), NULL);
842 child->parent = parent;
843 child->prev = prev;
844 child->next = next;
846 if (prev)
847 prev->next = child;
848 if (next)
849 next->prev = child;
851 return child;
852 }
854 NRArenaItem *
855 nr_arena_item_detach (NRArenaItem *parent, NRArenaItem *child)
856 {
857 nr_return_val_if_fail (parent != NULL, NULL);
858 nr_return_val_if_fail (NR_IS_ARENA_ITEM (parent), NULL);
859 nr_return_val_if_fail (child != NULL, NULL);
860 nr_return_val_if_fail (NR_IS_ARENA_ITEM (child), NULL);
861 nr_return_val_if_fail (child->parent == parent, NULL);
863 NRArenaItem *prev = child->prev;
864 NRArenaItem *next = child->next;
866 child->parent = NULL;
867 child->prev = NULL;
868 child->next = NULL;
870 if (prev)
871 prev->next = next;
872 if (next)
873 next->prev = prev;
875 return next;
876 }
878 /*
879 Local Variables:
880 mode:c++
881 c-file-style:"stroustrup"
882 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
883 indent-tabs-mode:nil
884 fill-column:99
885 End:
886 */
887 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :