b7ec966bb2fac5ec49b6823ee45464136b4a3dd6
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 }
262 // fixme: to fix the display glitches, in outline mode bbox must be a combination of
263 // full item bbox and its clip and mask (after we have the API to get these)
265 /* Clipping */
266 if (item->clip) {
267 // FIXME: since here we only need bbox, consider passing
268 // ((state & !(NR_ARENA_ITEM_STATE_RENDER)) | NR_ARENA_ITEM_STATE_BBOX)
269 // instead of state, so it does not have to create rendering structures in nr_arena_shape_update
270 unsigned int newstate = nr_arena_item_invoke_update (item->clip, area, &childgc, state, reset);
271 if (newstate & NR_ARENA_ITEM_STATE_INVALID) {
272 item->state |= NR_ARENA_ITEM_STATE_INVALID;
273 return item->state;
274 }
275 nr_rect_l_intersect (&item->bbox, &item->bbox, &item->clip->bbox);
276 }
277 /* Masking */
278 if (item->mask) {
279 unsigned int newstate = nr_arena_item_invoke_update (item->mask, area, &childgc, state, reset);
280 if (newstate & NR_ARENA_ITEM_STATE_INVALID) {
281 item->state |= NR_ARENA_ITEM_STATE_INVALID;
282 return item->state;
283 }
284 nr_rect_l_intersect (&item->bbox, &item->bbox, &item->mask->bbox);
285 }
287 return item->state;
288 }
290 /**
291 * Render item to pixblock.
292 *
293 * \return Has NR_ARENA_ITEM_STATE_RENDER set on success.
294 */
296 unsigned int
297 nr_arena_item_invoke_render (cairo_t *ct, NRArenaItem *item, NRRectL const *area,
298 NRPixBlock *pb, unsigned int flags)
299 {
300 bool outline = (item->arena->rendermode == RENDERMODE_OUTLINE);
302 nr_return_val_if_fail (item != NULL, NR_ARENA_ITEM_STATE_INVALID);
303 nr_return_val_if_fail (NR_IS_ARENA_ITEM (item),
304 NR_ARENA_ITEM_STATE_INVALID);
305 nr_return_val_if_fail (item->state & NR_ARENA_ITEM_STATE_BBOX,
306 item->state);
308 #ifdef NR_ARENA_ITEM_VERBOSE
309 printf ("Invoke render %p: %d %d - %d %d\n", item, area->x0, area->y0,
310 area->x1, area->y1);
311 #endif
313 /* If we are outside bbox just return successfully */
314 if (!item->visible)
315 return item->state | NR_ARENA_ITEM_STATE_RENDER;
317 NRRectL carea;
318 nr_rect_l_intersect (&carea, area, &item->bbox);
319 if (nr_rect_l_test_empty (&carea))
320 return item->state | NR_ARENA_ITEM_STATE_RENDER;
321 if (item->filter && !outline) {
322 nr_rect_l_enlarge (&carea, item->filter->get_enlarge (item->ctm));
323 nr_rect_l_intersect (&carea, &carea, &item->bbox);
324 }
326 if (outline) {
327 // No caching in outline mode for now; investigate if it really gives any advantage with cairo.
328 // Also no attempts to clip anything; just render everything: item, clip, mask
329 // First, render the object itself
330 unsigned int state = NR_ARENA_ITEM_VIRTUAL (item, render) (ct, item, &carea, pb, flags);
331 if (state & NR_ARENA_ITEM_STATE_INVALID) {
332 /* Clean up and return error */
333 item->state |= NR_ARENA_ITEM_STATE_INVALID;
334 return item->state;
335 }
337 // render clip and mask, if any
338 guint32 saved_rgba = item->arena->outlinecolor; // save current outline color
339 // render clippath as an object, using a different color
340 if (item->clip) {
341 item->arena->outlinecolor = prefs_get_int_attribute("options.wireframecolors", "clips", 0x00ff00ff); // green clips
342 NR_ARENA_ITEM_VIRTUAL (item->clip, render) (ct, item->clip, &carea, pb, flags);
343 }
344 // render mask as an object, using a different color
345 if (item->mask) {
346 item->arena->outlinecolor = prefs_get_int_attribute("options.wireframecolors", "masks", 0x0000ffff); // blue masks
347 NR_ARENA_ITEM_VIRTUAL (item->mask, render) (ct, item->mask, &carea, pb, flags);
348 }
349 item->arena->outlinecolor = saved_rgba; // restore outline color
351 return item->state | NR_ARENA_ITEM_STATE_RENDER;
352 }
354 NRPixBlock cpb;
355 if (item->px) {
356 /* Has cache pixblock, render this and return */
357 nr_pixblock_setup_extern (&cpb, NR_PIXBLOCK_MODE_R8G8B8A8P,
358 /* fixme: This probably cannot overflow, because we render only if visible */
359 /* fixme: and pixel cache is there only for small items */
360 /* fixme: But this still needs extra check (Lauris) */
361 item->bbox.x0, item->bbox.y0,
362 item->bbox.x1, item->bbox.y1,
363 item->px,
364 4 * (item->bbox.x1 - item->bbox.x0), FALSE,
365 FALSE);
366 nr_blit_pixblock_pixblock (pb, &cpb);
367 nr_pixblock_release (&cpb);
368 pb->empty = FALSE;
369 return item->state | NR_ARENA_ITEM_STATE_RENDER;
370 }
372 NRPixBlock *dpb = pb;
374 /* Setup cache if we can */
375 if ((!(flags & NR_ARENA_ITEM_RENDER_NO_CACHE)) &&
376 (carea.x0 <= item->bbox.x0) && (carea.y0 <= item->bbox.y0) &&
377 (carea.x1 >= item->bbox.x1) && (carea.y1 >= item->bbox.y1) &&
378 (((item->bbox.x1 - item->bbox.x0) * (item->bbox.y1 -
379 item->bbox.y0)) <= 4096)) {
380 // Item bbox is fully in renderable area and size is acceptable
381 carea.x0 = item->bbox.x0;
382 carea.y0 = item->bbox.y0;
383 carea.x1 = item->bbox.x1;
384 carea.y1 = item->bbox.y1;
385 item->px =
386 new (GC::ATOMIC) unsigned char[4 * (carea.x1 - carea.x0) *
387 (carea.y1 - carea.y0)];
388 nr_pixblock_setup_extern (&cpb, NR_PIXBLOCK_MODE_R8G8B8A8P, carea.x0,
389 carea.y0, carea.x1, carea.y1, item->px,
390 4 * (carea.x1 - carea.x0), TRUE, TRUE);
391 cpb.visible_area = pb->visible_area;
392 dpb = &cpb;
393 // Set nocache flag for downstream rendering
394 flags |= NR_ARENA_ITEM_RENDER_NO_CACHE;
395 }
397 /* Determine, whether we need temporary buffer */
398 if (item->clip || item->mask
399 || ((item->opacity != 255) && !item->render_opacity)
400 || (item->filter) || item->background_new
401 || (item->parent && item->parent->background_pb)) {
403 /* Setup and render item buffer */
404 NRPixBlock ipb;
405 nr_pixblock_setup_fast (&ipb, NR_PIXBLOCK_MODE_R8G8B8A8P,
406 carea.x0, carea.y0, carea.x1, carea.y1,
407 TRUE);
409 // if memory allocation failed, abort render
410 if (ipb.size != NR_PIXBLOCK_SIZE_TINY && ipb.data.px == NULL) {
411 nr_pixblock_release (&ipb);
412 return (item->state);
413 }
415 /* If background access is used, save the pixblock address.
416 * This address is set to NULL at the end of this block */
417 if (item->background_new
418 || (item->parent && item->parent->background_pb)) {
419 item->background_pb = &ipb;
420 }
421 ipb.visible_area = pb->visible_area;
422 unsigned int state = NR_ARENA_ITEM_VIRTUAL (item, render) (ct, item, &carea, &ipb, flags);
423 if (state & NR_ARENA_ITEM_STATE_INVALID) {
424 /* Clean up and return error */
425 nr_pixblock_release (&ipb);
426 if (dpb != pb)
427 nr_pixblock_release (dpb);
428 item->state |= NR_ARENA_ITEM_STATE_INVALID;
429 return item->state;
430 }
431 ipb.empty = FALSE;
433 /* Run filtering, if a filter is set for this object */
434 if (item->filter) {
435 item->filter->render (item, &ipb);
436 }
438 if (item->clip || item->mask) {
439 /* Setup mask pixblock */
440 NRPixBlock mpb;
441 nr_pixblock_setup_fast (&mpb, NR_PIXBLOCK_MODE_A8, carea.x0,
442 carea.y0, carea.x1, carea.y1, TRUE);
444 if (mpb.data.px != NULL) { // if memory allocation was successful
446 mpb.visible_area = pb->visible_area;
447 /* Do clip if needed */
448 if (item->clip) {
449 state = nr_arena_item_invoke_clip (item->clip, &carea, &mpb);
450 if (state & NR_ARENA_ITEM_STATE_INVALID) {
451 /* Clean up and return error */
452 nr_pixblock_release (&mpb);
453 nr_pixblock_release (&ipb);
454 if (dpb != pb)
455 nr_pixblock_release (dpb);
456 item->state |= NR_ARENA_ITEM_STATE_INVALID;
457 return item->state;
458 }
459 mpb.empty = FALSE;
460 }
461 /* Do mask if needed */
462 if (item->mask) {
463 NRPixBlock tpb;
464 /* Set up yet another temporary pixblock */
465 nr_pixblock_setup_fast (&tpb, NR_PIXBLOCK_MODE_R8G8B8A8N,
466 carea.x0, carea.y0, carea.x1,
467 carea.y1, TRUE);
469 if (tpb.data.px != NULL) { // if memory allocation was successful
471 tpb.visible_area = pb->visible_area;
472 unsigned int state = NR_ARENA_ITEM_VIRTUAL (item->mask, render) (ct, item->mask, &carea, &tpb, flags);
473 if (state & NR_ARENA_ITEM_STATE_INVALID) {
474 /* Clean up and return error */
475 nr_pixblock_release (&tpb);
476 nr_pixblock_release (&mpb);
477 nr_pixblock_release (&ipb);
478 if (dpb != pb)
479 nr_pixblock_release (dpb);
480 item->state |= NR_ARENA_ITEM_STATE_INVALID;
481 return item->state;
482 }
483 /* Composite with clip */
484 if (item->clip) {
485 int x, y;
486 for (y = carea.y0; y < carea.y1; y++) {
487 unsigned char *s, *d;
488 s = NR_PIXBLOCK_PX (&tpb) + (y -
489 carea.y0) * tpb.rs;
490 d = NR_PIXBLOCK_PX (&mpb) + (y -
491 carea.y0) * mpb.rs;
492 for (x = carea.x0; x < carea.x1; x++) {
493 unsigned int m;
494 m = NR_PREMUL_112 (s[0] + s[1] + s[2], s[3]);
495 d[0] =
496 FAST_DIV_ROUND < 3 * 255 * 255 >
497 (NR_PREMUL_123 (d[0], m));
498 s += 4;
499 d += 1;
500 }
501 }
502 } else {
503 int x, y;
504 for (y = carea.y0; y < carea.y1; y++) {
505 unsigned char *s, *d;
506 s = NR_PIXBLOCK_PX (&tpb) + (y -
507 carea.y0) * tpb.rs;
508 d = NR_PIXBLOCK_PX (&mpb) + (y -
509 carea.y0) * mpb.rs;
510 for (x = carea.x0; x < carea.x1; x++) {
511 unsigned int m;
512 m = NR_PREMUL_112 (s[0] + s[1] + s[2], s[3]);
513 d[0] = FAST_DIV_ROUND < 3 * 255 > (m);
514 s += 4;
515 d += 1;
516 }
517 }
518 mpb.empty = FALSE;
519 }
520 }
521 nr_pixblock_release (&tpb);
522 }
523 /* Multiply with opacity if needed */
524 if ((item->opacity != 255) && !item->render_opacity
525 ) {
526 int x, y;
527 unsigned int a;
528 a = item->opacity;
529 for (y = carea.y0; y < carea.y1; y++) {
530 unsigned char *d;
531 d = NR_PIXBLOCK_PX (&mpb) + (y - carea.y0) * mpb.rs;
532 for (x = carea.x0; x < carea.x1; x++) {
533 d[0] = NR_PREMUL_111 (d[0], a);
534 d += 1;
535 }
536 }
537 }
538 /* Compose rendering pixblock int destination */
539 nr_blit_pixblock_pixblock_mask (dpb, &ipb, &mpb);
540 }
541 nr_pixblock_release (&mpb);
542 /* This pointer wouldn't be valid outside this block, so clear it */
543 item->background_pb = NULL;
545 } else {
546 if (item->render_opacity) { // opacity was already rendered in, just copy to dpb here
547 nr_blit_pixblock_pixblock(dpb, &ipb);
548 } else { // copy while multiplying by opacity
549 nr_blit_pixblock_pixblock_alpha (dpb, &ipb, item->opacity);
550 }
551 }
552 nr_pixblock_release (&ipb);
553 dpb->empty = FALSE;
554 } else {
555 /* Just render */
556 unsigned int state = NR_ARENA_ITEM_VIRTUAL (item, render) (ct, item, &carea, dpb, flags);
557 if (state & NR_ARENA_ITEM_STATE_INVALID) {
558 /* Clean up and return error */
559 if (dpb != pb)
560 nr_pixblock_release (dpb);
561 item->state |= NR_ARENA_ITEM_STATE_INVALID;
562 return item->state;
563 }
564 dpb->empty = FALSE;
565 }
567 if (dpb != pb) {
568 /* Have to blit from cache */
569 nr_blit_pixblock_pixblock (pb, dpb);
570 nr_pixblock_release (dpb);
571 pb->empty = FALSE;
572 item->state |= NR_ARENA_ITEM_STATE_IMAGE;
573 }
575 return item->state | NR_ARENA_ITEM_STATE_RENDER;
576 }
578 unsigned int
579 nr_arena_item_invoke_clip (NRArenaItem *item, NRRectL *area, NRPixBlock *pb)
580 {
581 nr_return_val_if_fail (item != NULL, NR_ARENA_ITEM_STATE_INVALID);
582 nr_return_val_if_fail (NR_IS_ARENA_ITEM (item),
583 NR_ARENA_ITEM_STATE_INVALID);
584 /* we originally short-circuited if the object state included
585 * NR_ARENA_ITEM_STATE_CLIP (and showed a warning on the console);
586 * anyone know why we stopped doing so?
587 */
588 nr_return_val_if_fail ((pb->area.x1 - pb->area.x0) >=
589 (area->x1 - area->x0),
590 NR_ARENA_ITEM_STATE_INVALID);
591 nr_return_val_if_fail ((pb->area.y1 - pb->area.y0) >=
592 (area->y1 - area->y0),
593 NR_ARENA_ITEM_STATE_INVALID);
595 #ifdef NR_ARENA_ITEM_VERBOSE
596 printf ("Invoke clip by %p: %d %d - %d %d, item bbox %d %d - %d %d\n",
597 item, area->x0, area->y0, area->x1, area->y1, (&item->bbox)->x0,
598 (&item->bbox)->y0, (&item->bbox)->x1, (&item->bbox)->y1);
599 #endif
601 if (item->visible && nr_rect_l_test_intersect (area, &item->bbox)) {
602 /* Need render that item */
603 if (((NRArenaItemClass *) NR_OBJECT_GET_CLASS (item))->clip) {
604 return ((NRArenaItemClass *) NR_OBJECT_GET_CLASS (item))->
605 clip (item, area, pb);
606 }
607 }
609 return item->state;
610 }
612 NRArenaItem *
613 nr_arena_item_invoke_pick (NRArenaItem *item, NR::Point p, double delta,
614 unsigned int sticky)
615 {
616 nr_return_val_if_fail (item != NULL, NULL);
617 nr_return_val_if_fail (NR_IS_ARENA_ITEM (item), NULL);
619 // Sometimes there's no BBOX in item->state, reason unknown (bug 992817); I made this not an assert to remove the warning
620 if (!(item->state & NR_ARENA_ITEM_STATE_BBOX)
621 || !(item->state & NR_ARENA_ITEM_STATE_PICK))
622 return NULL;
624 if (!sticky && !(item->visible && item->sensitive))
625 return NULL;
627 // TODO: rewrite using NR::Rect
628 const double x = p[NR::X];
629 const double y = p[NR::Y];
631 if (((x + delta) >= item->bbox.x0) &&
632 ((x - delta) < item->bbox.x1) &&
633 ((y + delta) >= item->bbox.y0) && ((y - delta) < item->bbox.y1)) {
634 if (((NRArenaItemClass *) NR_OBJECT_GET_CLASS (item))->pick)
635 return ((NRArenaItemClass *) NR_OBJECT_GET_CLASS (item))->
636 pick (item, p, delta, sticky);
637 }
639 return NULL;
640 }
642 void
643 nr_arena_item_request_update (NRArenaItem *item, unsigned int reset,
644 unsigned int propagate)
645 {
646 nr_return_if_fail (item != NULL);
647 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
648 nr_return_if_fail (!(reset & NR_ARENA_ITEM_STATE_INVALID));
650 if (propagate && !item->propagate)
651 item->propagate = TRUE;
653 if (item->state & reset) {
654 item->state &= ~reset;
655 if (item->parent) {
656 nr_arena_item_request_update (item->parent, reset, FALSE);
657 } else {
658 nr_arena_request_update (item->arena, item);
659 }
660 }
661 }
663 void
664 nr_arena_item_request_render (NRArenaItem *item)
665 {
666 nr_return_if_fail (item != NULL);
667 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
669 nr_arena_request_render_rect (item->arena, &item->bbox);
670 }
672 /* Public */
674 NRArenaItem *
675 nr_arena_item_unparent (NRArenaItem *item)
676 {
677 nr_return_val_if_fail (item != NULL, NULL);
678 nr_return_val_if_fail (NR_IS_ARENA_ITEM (item), NULL);
680 nr_arena_item_request_render (item);
682 if (item->parent) {
683 nr_arena_item_remove_child (item->parent, item);
684 }
686 return NULL;
687 }
689 void
690 nr_arena_item_append_child (NRArenaItem *parent, NRArenaItem *child)
691 {
692 nr_return_if_fail (parent != NULL);
693 nr_return_if_fail (NR_IS_ARENA_ITEM (parent));
694 nr_return_if_fail (child != NULL);
695 nr_return_if_fail (NR_IS_ARENA_ITEM (child));
696 nr_return_if_fail (parent->arena == child->arena);
697 nr_return_if_fail (child->parent == NULL);
698 nr_return_if_fail (child->prev == NULL);
699 nr_return_if_fail (child->next == NULL);
701 nr_arena_item_add_child (parent, child, nr_arena_item_last_child (parent));
702 }
704 void
705 nr_arena_item_set_transform (NRArenaItem *item, NR::Matrix const &transform)
706 {
707 NRMatrix const t (transform);
708 nr_arena_item_set_transform (item, &t);
709 }
711 void
712 nr_arena_item_set_transform (NRArenaItem *item, NRMatrix const *transform)
713 {
714 nr_return_if_fail (item != NULL);
715 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
717 if (!transform && !item->transform)
718 return;
720 const NRMatrix *md = (item->transform) ? item->transform : &NR_MATRIX_IDENTITY;
721 const NRMatrix *ms = (transform) ? transform : &NR_MATRIX_IDENTITY;
723 if (!NR_MATRIX_DF_TEST_CLOSE (md, ms, NR_EPSILON)) {
724 nr_arena_item_request_render (item);
725 if (!transform || nr_matrix_test_identity (transform, NR_EPSILON)) {
726 /* Set to identity affine */
727 item->transform = NULL;
728 } else {
729 if (!item->transform)
730 item->transform = new (GC::ATOMIC) NRMatrix ();
731 *item->transform = *transform;
732 }
733 nr_arena_item_request_update (item, NR_ARENA_ITEM_STATE_ALL, TRUE);
734 }
735 }
737 void
738 nr_arena_item_set_opacity (NRArenaItem *item, double opacity)
739 {
740 nr_return_if_fail (item != NULL);
741 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
743 nr_arena_item_request_render (item);
745 item->opacity = (unsigned int) (opacity * 255.9999);
746 }
748 void
749 nr_arena_item_set_sensitive (NRArenaItem *item, unsigned int sensitive)
750 {
751 nr_return_if_fail (item != NULL);
752 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
754 /* fixme: mess with pick/repick... */
756 item->sensitive = sensitive;
757 }
759 void
760 nr_arena_item_set_visible (NRArenaItem *item, unsigned int visible)
761 {
762 nr_return_if_fail (item != NULL);
763 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
765 item->visible = visible;
767 nr_arena_item_request_render (item);
768 }
770 void
771 nr_arena_item_set_clip (NRArenaItem *item, NRArenaItem *clip)
772 {
773 nr_return_if_fail (item != NULL);
774 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
775 nr_return_if_fail (!clip || NR_IS_ARENA_ITEM (clip));
777 if (clip != item->clip) {
778 nr_arena_item_request_render (item);
779 if (item->clip)
780 item->clip = nr_arena_item_detach (item, item->clip);
781 if (clip)
782 item->clip = nr_arena_item_attach (item, clip, NULL, NULL);
783 nr_arena_item_request_update (item, NR_ARENA_ITEM_STATE_ALL, TRUE);
784 }
785 }
787 void
788 nr_arena_item_set_mask (NRArenaItem *item, NRArenaItem *mask)
789 {
790 nr_return_if_fail (item != NULL);
791 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
792 nr_return_if_fail (!mask || NR_IS_ARENA_ITEM (mask));
794 if (mask != item->mask) {
795 nr_arena_item_request_render (item);
796 if (item->mask)
797 item->mask = nr_arena_item_detach (item, item->mask);
798 if (mask)
799 item->mask = nr_arena_item_attach (item, mask, NULL, NULL);
800 nr_arena_item_request_update (item, NR_ARENA_ITEM_STATE_ALL, TRUE);
801 }
802 }
804 void
805 nr_arena_item_set_order (NRArenaItem *item, int order)
806 {
807 nr_return_if_fail (item != NULL);
808 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
810 if (!item->parent)
811 return;
813 NRArenaItem *children = nr_arena_item_children (item->parent);
815 NRArenaItem *ref = NULL;
816 int pos = 0;
817 for (NRArenaItem *child = children; child != NULL; child = child->next) {
818 if (pos >= order)
819 break;
820 if (child != item) {
821 ref = child;
822 pos += 1;
823 }
824 }
826 nr_arena_item_set_child_position (item->parent, item, ref);
827 }
829 /** Returns a background image for use with filter effects. */
830 NRPixBlock *
831 nr_arena_item_get_background (NRArenaItem const *item, int depth)
832 {
833 NRPixBlock *pb;
834 if (!item->background_pb)
835 return NULL;
836 if (item->background_new) {
837 pb = new NRPixBlock ();
838 nr_pixblock_setup_fast (pb, item->background_pb->mode,
839 item->background_pb->area.x0,
840 item->background_pb->area.y0,
841 item->background_pb->area.x1,
842 item->background_pb->area.y1, true);
843 if (pb->size != NR_PIXBLOCK_SIZE_TINY && pb->data.px == NULL) // allocation failed
844 return NULL;
845 } else if (item->parent) {
846 pb = nr_arena_item_get_background (item->parent, depth + 1);
847 } else
848 return NULL;
850 if (depth > 0)
851 nr_blit_pixblock_pixblock (pb, item->background_pb);
853 return pb;
854 }
856 /* Helpers */
858 NRArenaItem *
859 nr_arena_item_attach (NRArenaItem *parent, NRArenaItem *child,
860 NRArenaItem *prev, NRArenaItem *next)
861 {
862 nr_return_val_if_fail (parent != NULL, NULL);
863 nr_return_val_if_fail (NR_IS_ARENA_ITEM (parent), NULL);
864 nr_return_val_if_fail (child != NULL, NULL);
865 nr_return_val_if_fail (NR_IS_ARENA_ITEM (child), NULL);
866 nr_return_val_if_fail (child->parent == NULL, NULL);
867 nr_return_val_if_fail (child->prev == NULL, NULL);
868 nr_return_val_if_fail (child->next == NULL, NULL);
869 nr_return_val_if_fail (!prev || NR_IS_ARENA_ITEM (prev), NULL);
870 nr_return_val_if_fail (!prev || (prev->parent == parent), NULL);
871 nr_return_val_if_fail (!prev || (prev->next == next), NULL);
872 nr_return_val_if_fail (!next || NR_IS_ARENA_ITEM (next), NULL);
873 nr_return_val_if_fail (!next || (next->parent == parent), NULL);
874 nr_return_val_if_fail (!next || (next->prev == prev), NULL);
876 child->parent = parent;
877 child->prev = prev;
878 child->next = next;
880 if (prev)
881 prev->next = child;
882 if (next)
883 next->prev = child;
885 return child;
886 }
888 NRArenaItem *
889 nr_arena_item_detach (NRArenaItem *parent, NRArenaItem *child)
890 {
891 nr_return_val_if_fail (parent != NULL, NULL);
892 nr_return_val_if_fail (NR_IS_ARENA_ITEM (parent), NULL);
893 nr_return_val_if_fail (child != NULL, NULL);
894 nr_return_val_if_fail (NR_IS_ARENA_ITEM (child), NULL);
895 nr_return_val_if_fail (child->parent == parent, NULL);
897 NRArenaItem *prev = child->prev;
898 NRArenaItem *next = child->next;
900 child->parent = NULL;
901 child->prev = NULL;
902 child->next = NULL;
904 if (prev)
905 prev->next = next;
906 if (next)
907 next->prev = prev;
909 return next;
910 }
912 /*
913 Local Variables:
914 mode:c++
915 c-file-style:"stroustrup"
916 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
917 indent-tabs-mode:nil
918 fill-column:99
919 End:
920 */
921 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :