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
18 #include <cstring>
19 #include <string>
21 #include <libnr/nr-blit.h>
22 #include <libnr/nr-pixops.h>
23 #include "nr-arena.h"
24 #include "nr-arena-item.h"
25 #include "gc-core.h"
26 #include "helper/geom.h"
28 #include "nr-filter.h"
29 #include "nr-arena-group.h"
30 #include "preferences.h"
32 namespace GC = Inkscape::GC;
34 static void nr_arena_item_class_init (NRArenaItemClass *klass);
35 static void nr_arena_item_init (NRArenaItem *item);
36 static void nr_arena_item_private_finalize (NRObject *object);
38 static NRObjectClass *parent_class;
40 NRType
41 nr_arena_item_get_type (void)
42 {
43 static NRType type = 0;
44 if (!type) {
45 type = nr_object_register_type (NR_TYPE_OBJECT,
46 "NRArenaItem",
47 sizeof (NRArenaItemClass),
48 sizeof (NRArenaItem),
49 (void (*)(NRObjectClass *))
50 nr_arena_item_class_init,
51 (void (*)(NRObject *))
52 nr_arena_item_init);
53 }
54 return type;
55 }
57 static void
58 nr_arena_item_class_init (NRArenaItemClass *klass)
59 {
60 NRObjectClass *object_class;
62 object_class = (NRObjectClass *) klass;
64 parent_class = ((NRObjectClass *) klass)->parent;
66 object_class->finalize = nr_arena_item_private_finalize;
67 object_class->cpp_ctor = NRObject::invoke_ctor < NRArenaItem >;
68 }
70 static void
71 nr_arena_item_init (NRArenaItem *item)
72 {
73 item->arena = NULL;
74 item->parent = NULL;
75 item->next = item->prev = NULL;
77 item->key = 0;
79 item->state = 0;
80 item->sensitive = TRUE;
81 item->visible = TRUE;
83 memset (&item->bbox, 0, sizeof (item->bbox));
84 memset (&item->drawbox, 0, sizeof (item->drawbox));
85 item->transform = NULL;
86 item->opacity = 255;
87 item->render_opacity = FALSE;
89 item->transform = NULL;
90 item->clip = NULL;
91 item->mask = NULL;
92 item->px = NULL;
93 item->data = NULL;
94 item->filter = NULL;
95 item->background_pb = NULL;
96 item->background_new = false;
97 }
99 static void
100 nr_arena_item_private_finalize (NRObject *object)
101 {
102 NRArenaItem *item = static_cast < NRArenaItem * >(object);
104 item->px = NULL;
105 item->transform = NULL;
107 ((NRObjectClass *) (parent_class))->finalize (object);
108 }
110 NRArenaItem *
111 nr_arena_item_children (NRArenaItem *item)
112 {
113 nr_return_val_if_fail (item != NULL, NULL);
114 nr_return_val_if_fail (NR_IS_ARENA_ITEM (item), NULL);
116 if (NR_ARENA_ITEM_VIRTUAL (item, children))
117 return NR_ARENA_ITEM_VIRTUAL (item, children) (item);
119 return NULL;
120 }
122 NRArenaItem *
123 nr_arena_item_last_child (NRArenaItem *item)
124 {
125 nr_return_val_if_fail (item != NULL, NULL);
126 nr_return_val_if_fail (NR_IS_ARENA_ITEM (item), NULL);
128 if (NR_ARENA_ITEM_VIRTUAL (item, last_child)) {
129 return NR_ARENA_ITEM_VIRTUAL (item, last_child) (item);
130 } else {
131 NRArenaItem *ref = nr_arena_item_children (item);
132 if (ref)
133 while (ref->next)
134 ref = ref->next;
135 return ref;
136 }
137 }
139 void
140 nr_arena_item_add_child (NRArenaItem *item, NRArenaItem *child,
141 NRArenaItem *ref)
142 {
143 nr_return_if_fail (item != NULL);
144 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
145 nr_return_if_fail (child != NULL);
146 nr_return_if_fail (NR_IS_ARENA_ITEM (child));
147 nr_return_if_fail (child->parent == NULL);
148 nr_return_if_fail (child->prev == NULL);
149 nr_return_if_fail (child->next == NULL);
150 nr_return_if_fail (child->arena == item->arena);
151 nr_return_if_fail (child != ref);
152 nr_return_if_fail (!ref || NR_IS_ARENA_ITEM (ref));
153 nr_return_if_fail (!ref || (ref->parent == item));
155 if (NR_ARENA_ITEM_VIRTUAL (item, add_child))
156 NR_ARENA_ITEM_VIRTUAL (item, add_child) (item, child, ref);
157 }
159 void
160 nr_arena_item_remove_child (NRArenaItem *item, NRArenaItem *child)
161 {
162 nr_return_if_fail (item != NULL);
163 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
164 nr_return_if_fail (child != NULL);
165 nr_return_if_fail (NR_IS_ARENA_ITEM (child));
166 nr_return_if_fail (child->parent == item);
168 if (NR_ARENA_ITEM_VIRTUAL (item, remove_child))
169 NR_ARENA_ITEM_VIRTUAL (item, remove_child) (item, child);
170 }
172 void
173 nr_arena_item_set_child_position (NRArenaItem *item, NRArenaItem *child,
174 NRArenaItem *ref)
175 {
176 nr_return_if_fail (item != NULL);
177 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
178 nr_return_if_fail (child != NULL);
179 nr_return_if_fail (NR_IS_ARENA_ITEM (child));
180 nr_return_if_fail (child->parent == item);
181 nr_return_if_fail (!ref || NR_IS_ARENA_ITEM (ref));
182 nr_return_if_fail (!ref || (ref->parent == item));
184 if (NR_ARENA_ITEM_VIRTUAL (item, set_child_position))
185 NR_ARENA_ITEM_VIRTUAL (item, set_child_position) (item, child, ref);
186 }
188 NRArenaItem *
189 nr_arena_item_ref (NRArenaItem *item)
190 {
191 nr_object_ref ((NRObject *) item);
193 return item;
194 }
196 NRArenaItem *
197 nr_arena_item_unref (NRArenaItem *item)
198 {
199 nr_object_unref ((NRObject *) item);
201 return NULL;
202 }
204 unsigned int
205 nr_arena_item_invoke_update (NRArenaItem *item, NRRectL *area, NRGC *gc,
206 unsigned int state, unsigned int reset)
207 {
208 NRGC childgc (gc);
209 bool filter = (item->arena->rendermode == Inkscape::RENDERMODE_NORMAL);
211 nr_return_val_if_fail (item != NULL, NR_ARENA_ITEM_STATE_INVALID);
212 nr_return_val_if_fail (NR_IS_ARENA_ITEM (item),
213 NR_ARENA_ITEM_STATE_INVALID);
214 nr_return_val_if_fail (!(state & NR_ARENA_ITEM_STATE_INVALID),
215 NR_ARENA_ITEM_STATE_INVALID);
217 #ifdef NR_ARENA_ITEM_DEBUG_CASCADE
218 printf ("Update %s:%p %x %x %x\n",
219 nr_type_name_from_instance ((GTypeInstance *) item), item, state,
220 item->state, reset);
221 #endif
223 /* return if in error */
224 if (item->state & NR_ARENA_ITEM_STATE_INVALID)
225 return item->state;
226 /* Set reset flags according to propagation status */
227 if (item->propagate) {
228 reset |= ~item->state;
229 item->propagate = FALSE;
230 }
231 /* Reset our state */
232 item->state &= ~reset;
233 /* Return if NOP */
234 if (!(~item->state & state))
235 return item->state;
236 /* Test whether to return immediately */
237 if (area && (item->state & NR_ARENA_ITEM_STATE_BBOX)) {
238 if (!nr_rect_l_test_intersect_ptr(area, &item->drawbox))
239 return item->state;
240 }
242 /* Reset image cache, if not to be kept */
243 if (!(item->state & NR_ARENA_ITEM_STATE_IMAGE) && (item->px)) {
244 item->px = NULL;
245 }
247 /* Set up local gc */
248 childgc = *gc;
249 if (item->transform) {
250 childgc.transform = (*item->transform) * childgc.transform;
251 }
252 /* Remember the transformation matrix */
253 item->ctm = childgc.transform;
255 /* Invoke the real method */
256 // that will update bbox
257 item->state = NR_ARENA_ITEM_VIRTUAL (item, update) (item, area, &childgc, state, reset);
258 if (item->state & NR_ARENA_ITEM_STATE_INVALID)
259 return item->state;
261 // get a copy of bbox
262 memcpy(&item->drawbox, &item->bbox, sizeof(item->bbox));
264 /* Enlarge the drawbox to contain filter effects */
265 if (item->filter && filter) {
266 item->filter->bbox_enlarge (item->drawbox);
267 }
268 // fixme: to fix the display glitches, in outline mode bbox must be a combination of
269 // full item bbox and its clip and mask (after we have the API to get these)
271 /* Clipping */
272 if (item->clip) {
273 // FIXME: since here we only need bbox, consider passing
274 // ((state & !(NR_ARENA_ITEM_STATE_RENDER)) | NR_ARENA_ITEM_STATE_BBOX)
275 // instead of state, so it does not have to create rendering structures in nr_arena_shape_update
276 unsigned int newstate = nr_arena_item_invoke_update (item->clip, area, &childgc, state, reset);
277 if (newstate & NR_ARENA_ITEM_STATE_INVALID) {
278 item->state |= NR_ARENA_ITEM_STATE_INVALID;
279 return item->state;
280 }
281 // for clipping, we need geometric bbox
282 nr_rect_l_intersect (&item->drawbox, &item->drawbox, &item->clip->bbox);
283 }
284 /* Masking */
285 if (item->mask) {
286 unsigned int newstate = nr_arena_item_invoke_update (item->mask, area, &childgc, state, reset);
287 if (newstate & NR_ARENA_ITEM_STATE_INVALID) {
288 item->state |= NR_ARENA_ITEM_STATE_INVALID;
289 return item->state;
290 }
291 // for masking, we need full drawbox of mask
292 nr_rect_l_intersect (&item->drawbox, &item->drawbox, &item->mask->drawbox);
293 }
295 // now that we know drawbox, dirty the corresponding rect on canvas:
296 if (!NR_IS_ARENA_GROUP(item) || (item->filter && filter)) {
297 // unless filtered, groups do not need to render by themselves, only their members
298 nr_arena_item_request_render (item);
299 }
301 return item->state;
302 }
304 /**
305 * Render item to pixblock.
306 *
307 * \return Has NR_ARENA_ITEM_STATE_RENDER set on success.
308 */
310 unsigned int
311 nr_arena_item_invoke_render (cairo_t *ct, NRArenaItem *item, NRRectL const *area,
312 NRPixBlock *pb, unsigned int flags)
313 {
314 bool outline = (item->arena->rendermode == Inkscape::RENDERMODE_OUTLINE);
315 bool filter = (item->arena->rendermode == Inkscape::RENDERMODE_NORMAL);
317 nr_return_val_if_fail (item != NULL, NR_ARENA_ITEM_STATE_INVALID);
318 nr_return_val_if_fail (NR_IS_ARENA_ITEM (item),
319 NR_ARENA_ITEM_STATE_INVALID);
320 nr_return_val_if_fail (item->state & NR_ARENA_ITEM_STATE_BBOX,
321 item->state);
323 #ifdef NR_ARENA_ITEM_VERBOSE
324 printf ("Invoke render %p: %d %d - %d %d\n", item, area->x0, area->y0,
325 area->x1, area->y1);
326 #endif
328 /* If we are invisible, just return successfully */
329 if (!item->visible)
330 return item->state | NR_ARENA_ITEM_STATE_RENDER;
332 NRRectL carea;
333 nr_rect_l_intersect (&carea, area, &item->drawbox);
334 if (nr_rect_l_test_empty(carea))
335 return item->state | NR_ARENA_ITEM_STATE_RENDER;
336 if (item->filter && filter) {
337 item->filter->area_enlarge (carea, item);
338 nr_rect_l_intersect (&carea, &carea, &item->drawbox);
339 }
341 if (outline) {
342 // No caching in outline mode for now; investigate if it really gives any advantage with cairo.
343 // Also no attempts to clip anything; just render everything: item, clip, mask
344 // First, render the object itself
345 unsigned int state = NR_ARENA_ITEM_VIRTUAL (item, render) (ct, item, &carea, pb, flags);
346 if (state & NR_ARENA_ITEM_STATE_INVALID) {
347 /* Clean up and return error */
348 item->state |= NR_ARENA_ITEM_STATE_INVALID;
349 return item->state;
350 }
352 // render clip and mask, if any
353 guint32 saved_rgba = item->arena->outlinecolor; // save current outline color
354 // render clippath as an object, using a different color
355 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
356 if (item->clip) {
357 item->arena->outlinecolor = prefs->getInt("/options/wireframecolors/clips", 0x00ff00ff); // green clips
358 NR_ARENA_ITEM_VIRTUAL (item->clip, render) (ct, item->clip, &carea, pb, flags);
359 }
360 // render mask as an object, using a different color
361 if (item->mask) {
362 item->arena->outlinecolor = prefs->getInt("/options/wireframecolors/masks", 0x0000ffff); // blue masks
363 NR_ARENA_ITEM_VIRTUAL (item->mask, render) (ct, item->mask, &carea, pb, flags);
364 }
365 item->arena->outlinecolor = saved_rgba; // restore outline color
367 return item->state | NR_ARENA_ITEM_STATE_RENDER;
368 }
370 NRPixBlock cpb;
371 if (item->px) {
372 /* Has cache pixblock, render this and return */
373 nr_pixblock_setup_extern (&cpb, NR_PIXBLOCK_MODE_R8G8B8A8P,
374 /* fixme: This probably cannot overflow, because we render only if visible */
375 /* fixme: and pixel cache is there only for small items */
376 /* fixme: But this still needs extra check (Lauris) */
377 item->drawbox.x0, item->drawbox.y0,
378 item->drawbox.x1, item->drawbox.y1,
379 item->px,
380 4 * (item->drawbox.x1 - item->drawbox.x0), FALSE,
381 FALSE);
382 nr_blit_pixblock_pixblock (pb, &cpb);
383 nr_pixblock_release (&cpb);
384 pb->empty = FALSE;
385 return item->state | NR_ARENA_ITEM_STATE_RENDER;
386 }
388 NRPixBlock *dpb = pb;
390 /* Setup cache if we can */
391 if ((!(flags & NR_ARENA_ITEM_RENDER_NO_CACHE)) &&
392 (carea.x0 <= item->drawbox.x0) && (carea.y0 <= item->drawbox.y0) &&
393 (carea.x1 >= item->drawbox.x1) && (carea.y1 >= item->drawbox.y1) &&
394 (((item->drawbox.x1 - item->drawbox.x0) * (item->drawbox.y1 -
395 item->drawbox.y0)) <= 4096)) {
396 // Item drawbox is fully in renderable area and size is acceptable
397 carea.x0 = item->drawbox.x0;
398 carea.y0 = item->drawbox.y0;
399 carea.x1 = item->drawbox.x1;
400 carea.y1 = item->drawbox.y1;
401 item->px =
402 new (GC::ATOMIC) unsigned char[4 * (carea.x1 - carea.x0) *
403 (carea.y1 - carea.y0)];
404 nr_pixblock_setup_extern (&cpb, NR_PIXBLOCK_MODE_R8G8B8A8P, carea.x0,
405 carea.y0, carea.x1, carea.y1, item->px,
406 4 * (carea.x1 - carea.x0), TRUE, TRUE);
407 cpb.visible_area = pb->visible_area;
408 dpb = &cpb;
409 // Set nocache flag for downstream rendering
410 flags |= NR_ARENA_ITEM_RENDER_NO_CACHE;
411 }
413 /* Determine, whether we need temporary buffer */
414 if (item->clip || item->mask
415 || ((item->opacity != 255) && !item->render_opacity)
416 || (item->filter && filter) || item->background_new
417 || (item->parent && item->parent->background_pb)) {
419 /* Setup and render item buffer */
420 NRPixBlock ipb;
421 nr_pixblock_setup_fast (&ipb, NR_PIXBLOCK_MODE_R8G8B8A8P,
422 carea.x0, carea.y0, carea.x1, carea.y1,
423 TRUE);
425 // if memory allocation failed, abort render
426 if (ipb.size != NR_PIXBLOCK_SIZE_TINY && ipb.data.px == NULL) {
427 nr_pixblock_release (&ipb);
428 return (item->state);
429 }
431 /* If background access is used, save the pixblock address.
432 * This address is set to NULL at the end of this block */
433 if (item->background_new ||
434 (item->parent && item->parent->background_pb)) {
435 item->background_pb = &ipb;
436 }
438 ipb.visible_area = pb->visible_area;
439 if (item->filter && filter) {
440 item->filter->area_enlarge (ipb.visible_area, item);
441 }
443 unsigned int state = NR_ARENA_ITEM_VIRTUAL (item, render) (ct, item, &carea, &ipb, flags);
444 if (state & NR_ARENA_ITEM_STATE_INVALID) {
445 /* Clean up and return error */
446 nr_pixblock_release (&ipb);
447 if (dpb != pb)
448 nr_pixblock_release (dpb);
449 item->state |= NR_ARENA_ITEM_STATE_INVALID;
450 return item->state;
451 }
452 ipb.empty = FALSE;
454 /* Run filtering, if a filter is set for this object */
455 if (item->filter && filter) {
456 item->filter->render (item, &ipb);
457 }
459 if (item->clip || item->mask) {
460 /* Setup mask pixblock */
461 NRPixBlock mpb;
462 nr_pixblock_setup_fast (&mpb, NR_PIXBLOCK_MODE_A8, carea.x0,
463 carea.y0, carea.x1, carea.y1, TRUE);
465 if (mpb.data.px != NULL) { // if memory allocation was successful
467 mpb.visible_area = pb->visible_area;
468 /* Do clip if needed */
469 if (item->clip) {
470 state = nr_arena_item_invoke_clip (item->clip, &carea, &mpb);
471 if (state & NR_ARENA_ITEM_STATE_INVALID) {
472 /* Clean up and return error */
473 nr_pixblock_release (&mpb);
474 nr_pixblock_release (&ipb);
475 if (dpb != pb)
476 nr_pixblock_release (dpb);
477 item->state |= NR_ARENA_ITEM_STATE_INVALID;
478 return item->state;
479 }
480 mpb.empty = FALSE;
481 }
482 /* Do mask if needed */
483 if (item->mask) {
484 NRPixBlock tpb;
485 /* Set up yet another temporary pixblock */
486 nr_pixblock_setup_fast (&tpb, NR_PIXBLOCK_MODE_R8G8B8A8N,
487 carea.x0, carea.y0, carea.x1,
488 carea.y1, TRUE);
490 if (tpb.data.px != NULL) { // if memory allocation was successful
492 tpb.visible_area = pb->visible_area;
493 unsigned int state = NR_ARENA_ITEM_VIRTUAL (item->mask, render) (ct, item->mask, &carea, &tpb, flags);
494 if (state & NR_ARENA_ITEM_STATE_INVALID) {
495 /* Clean up and return error */
496 nr_pixblock_release (&tpb);
497 nr_pixblock_release (&mpb);
498 nr_pixblock_release (&ipb);
499 if (dpb != pb)
500 nr_pixblock_release (dpb);
501 item->state |= NR_ARENA_ITEM_STATE_INVALID;
502 return item->state;
503 }
504 /* Composite with clip */
505 if (item->clip) {
506 int x, y;
507 for (y = carea.y0; y < carea.y1; y++) {
508 unsigned char *s, *d;
509 s = NR_PIXBLOCK_PX (&tpb) + (y -
510 carea.y0) * tpb.rs;
511 d = NR_PIXBLOCK_PX (&mpb) + (y -
512 carea.y0) * mpb.rs;
513 for (x = carea.x0; x < carea.x1; x++) {
514 unsigned int m;
515 m = NR_PREMUL_112 (s[0] + s[1] + s[2], s[3]);
516 d[0] =
517 FAST_DIV_ROUND < 3 * 255 * 255 >
518 (NR_PREMUL_123 (d[0], m));
519 s += 4;
520 d += 1;
521 }
522 }
523 } else {
524 int x, y;
525 for (y = carea.y0; y < carea.y1; y++) {
526 unsigned char *s, *d;
527 s = NR_PIXBLOCK_PX (&tpb) + (y -
528 carea.y0) * tpb.rs;
529 d = NR_PIXBLOCK_PX (&mpb) + (y -
530 carea.y0) * mpb.rs;
531 for (x = carea.x0; x < carea.x1; x++) {
532 unsigned int m;
533 m = NR_PREMUL_112 (s[0] + s[1] + s[2], s[3]);
534 d[0] = FAST_DIV_ROUND < 3 * 255 > (m);
535 s += 4;
536 d += 1;
537 }
538 }
539 mpb.empty = FALSE;
540 }
541 }
542 nr_pixblock_release (&tpb);
543 }
544 /* Multiply with opacity if needed */
545 if ((item->opacity != 255) && !item->render_opacity
546 ) {
547 int x, y;
548 unsigned int a;
549 a = item->opacity;
550 for (y = carea.y0; y < carea.y1; y++) {
551 unsigned char *d;
552 d = NR_PIXBLOCK_PX (&mpb) + (y - carea.y0) * mpb.rs;
553 for (x = carea.x0; x < carea.x1; x++) {
554 d[0] = NR_PREMUL_111 (d[0], a);
555 d += 1;
556 }
557 }
558 }
559 /* Compose rendering pixblock int destination */
560 nr_blit_pixblock_pixblock_mask (dpb, &ipb, &mpb);
561 }
562 nr_pixblock_release (&mpb);
563 } else {
564 if (item->render_opacity) { // opacity was already rendered in, just copy to dpb here
565 nr_blit_pixblock_pixblock(dpb, &ipb);
566 } else { // copy while multiplying by opacity
567 nr_blit_pixblock_pixblock_alpha (dpb, &ipb, item->opacity);
568 }
569 }
570 nr_pixblock_release (&ipb);
571 dpb->empty = FALSE;
572 /* This pointer wouldn't be valid outside this block, so clear it */
573 item->background_pb = NULL;
574 } else {
575 /* Just render */
576 unsigned int state = NR_ARENA_ITEM_VIRTUAL (item, render) (ct, item, &carea, dpb, flags);
577 if (state & NR_ARENA_ITEM_STATE_INVALID) {
578 /* Clean up and return error */
579 if (dpb != pb)
580 nr_pixblock_release (dpb);
581 item->state |= NR_ARENA_ITEM_STATE_INVALID;
582 return item->state;
583 }
584 dpb->empty = FALSE;
585 }
587 if (dpb != pb) {
588 /* Have to blit from cache */
589 nr_blit_pixblock_pixblock (pb, dpb);
590 nr_pixblock_release (dpb);
591 pb->empty = FALSE;
592 item->state |= NR_ARENA_ITEM_STATE_IMAGE;
593 }
595 return item->state | NR_ARENA_ITEM_STATE_RENDER;
596 }
598 unsigned int
599 nr_arena_item_invoke_clip (NRArenaItem *item, NRRectL *area, NRPixBlock *pb)
600 {
601 nr_return_val_if_fail (item != NULL, NR_ARENA_ITEM_STATE_INVALID);
602 nr_return_val_if_fail (NR_IS_ARENA_ITEM (item),
603 NR_ARENA_ITEM_STATE_INVALID);
604 /* we originally short-circuited if the object state included
605 * NR_ARENA_ITEM_STATE_CLIP (and showed a warning on the console);
606 * anyone know why we stopped doing so?
607 */
608 nr_return_val_if_fail ((pb->area.x1 - pb->area.x0) >=
609 (area->x1 - area->x0),
610 NR_ARENA_ITEM_STATE_INVALID);
611 nr_return_val_if_fail ((pb->area.y1 - pb->area.y0) >=
612 (area->y1 - area->y0),
613 NR_ARENA_ITEM_STATE_INVALID);
615 #ifdef NR_ARENA_ITEM_VERBOSE
616 printf ("Invoke clip by %p: %d %d - %d %d, item bbox %d %d - %d %d\n",
617 item, area->x0, area->y0, area->x1, area->y1, (&item->bbox)->x0,
618 (&item->bbox)->y0, (&item->bbox)->x1, (&item->bbox)->y1);
619 #endif
621 if (item->visible && nr_rect_l_test_intersect_ptr(area, &item->bbox)) {
622 /* Need render that item */
623 if (((NRArenaItemClass *) NR_OBJECT_GET_CLASS (item))->clip) {
624 return ((NRArenaItemClass *) NR_OBJECT_GET_CLASS (item))->
625 clip (item, area, pb);
626 }
627 }
629 return item->state;
630 }
632 NRArenaItem *
633 nr_arena_item_invoke_pick (NRArenaItem *item, Geom::Point p, double delta,
634 unsigned int sticky)
635 {
636 nr_return_val_if_fail (item != NULL, NULL);
637 nr_return_val_if_fail (NR_IS_ARENA_ITEM (item), NULL);
639 // Sometimes there's no BBOX in item->state, reason unknown (bug 992817); I made this not an assert to remove the warning
640 if (!(item->state & NR_ARENA_ITEM_STATE_BBOX)
641 || !(item->state & NR_ARENA_ITEM_STATE_PICK))
642 return NULL;
644 if (!sticky && !(item->visible && item->sensitive))
645 return NULL;
647 // TODO: rewrite using Geom::Rect
648 const double x = p[Geom::X];
649 const double y = p[Geom::Y];
651 if (((x + delta) >= item->bbox.x0) &&
652 ((x - delta) < item->bbox.x1) &&
653 ((y + delta) >= item->bbox.y0) && ((y - delta) < item->bbox.y1)) {
654 if (((NRArenaItemClass *) NR_OBJECT_GET_CLASS (item))->pick)
655 return ((NRArenaItemClass *) NR_OBJECT_GET_CLASS (item))->
656 pick (item, p, delta, sticky);
657 }
659 return NULL;
660 }
662 void
663 nr_arena_item_request_update (NRArenaItem *item, unsigned int reset,
664 unsigned int propagate)
665 {
666 nr_return_if_fail (item != NULL);
667 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
668 nr_return_if_fail (!(reset & NR_ARENA_ITEM_STATE_INVALID));
670 if (propagate && !item->propagate)
671 item->propagate = TRUE;
673 if (item->state & reset) {
674 item->state &= ~reset;
675 if (item->parent) {
676 nr_arena_item_request_update (item->parent, reset, FALSE);
677 } else {
678 nr_arena_request_update (item->arena, item);
679 }
680 }
681 }
683 void
684 nr_arena_item_request_render (NRArenaItem *item)
685 {
686 nr_return_if_fail (item != NULL);
687 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
689 nr_arena_request_render_rect (item->arena, &item->drawbox);
690 }
692 /* Public */
694 NRArenaItem *
695 nr_arena_item_unparent (NRArenaItem *item)
696 {
697 nr_return_val_if_fail (item != NULL, NULL);
698 nr_return_val_if_fail (NR_IS_ARENA_ITEM (item), NULL);
700 nr_arena_item_request_render (item);
702 if (item->parent) {
703 nr_arena_item_remove_child (item->parent, item);
704 }
706 return NULL;
707 }
709 void
710 nr_arena_item_append_child (NRArenaItem *parent, NRArenaItem *child)
711 {
712 nr_return_if_fail (parent != NULL);
713 nr_return_if_fail (NR_IS_ARENA_ITEM (parent));
714 nr_return_if_fail (child != NULL);
715 nr_return_if_fail (NR_IS_ARENA_ITEM (child));
716 nr_return_if_fail (parent->arena == child->arena);
717 nr_return_if_fail (child->parent == NULL);
718 nr_return_if_fail (child->prev == NULL);
719 nr_return_if_fail (child->next == NULL);
721 nr_arena_item_add_child (parent, child, nr_arena_item_last_child (parent));
722 }
724 void
725 nr_arena_item_set_transform (NRArenaItem *item, Geom::Matrix const &transform)
726 {
727 Geom::Matrix const t (transform);
728 nr_arena_item_set_transform (item, &t);
729 }
731 void
732 nr_arena_item_set_transform (NRArenaItem *item, Geom::Matrix const *transform)
733 {
734 nr_return_if_fail (item != NULL);
735 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
737 if (!transform && !item->transform)
738 return;
740 const Geom::Matrix *md = (item->transform) ? item->transform : &GEOM_MATRIX_IDENTITY;
741 const Geom::Matrix *ms = (transform) ? transform : &GEOM_MATRIX_IDENTITY;
743 if (!Geom::matrix_equalp(*md, *ms, NR_EPSILON)) {
744 nr_arena_item_request_render (item);
745 if (!transform || transform->isIdentity()) {
746 /* Set to identity affine */
747 item->transform = NULL;
748 } else {
749 if (!item->transform)
750 item->transform = new (GC::ATOMIC) Geom::Matrix ();
751 *item->transform = *transform;
752 }
753 nr_arena_item_request_update (item, NR_ARENA_ITEM_STATE_ALL, TRUE);
754 }
755 }
757 void
758 nr_arena_item_set_opacity (NRArenaItem *item, double opacity)
759 {
760 nr_return_if_fail (item != NULL);
761 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
763 nr_arena_item_request_render (item);
765 item->opacity = (unsigned int) (opacity * 255.9999);
766 }
768 void
769 nr_arena_item_set_sensitive (NRArenaItem *item, unsigned int sensitive)
770 {
771 nr_return_if_fail (item != NULL);
772 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
774 /* fixme: mess with pick/repick... */
776 item->sensitive = sensitive;
777 }
779 void
780 nr_arena_item_set_visible (NRArenaItem *item, unsigned int visible)
781 {
782 nr_return_if_fail (item != NULL);
783 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
785 item->visible = visible;
787 nr_arena_item_request_render (item);
788 }
790 void
791 nr_arena_item_set_clip (NRArenaItem *item, NRArenaItem *clip)
792 {
793 nr_return_if_fail (item != NULL);
794 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
795 nr_return_if_fail (!clip || NR_IS_ARENA_ITEM (clip));
797 if (clip != item->clip) {
798 nr_arena_item_request_render (item);
799 if (item->clip)
800 item->clip = nr_arena_item_detach (item, item->clip);
801 if (clip)
802 item->clip = nr_arena_item_attach (item, clip, NULL, NULL);
803 nr_arena_item_request_update (item, NR_ARENA_ITEM_STATE_ALL, TRUE);
804 }
805 }
807 void
808 nr_arena_item_set_mask (NRArenaItem *item, NRArenaItem *mask)
809 {
810 nr_return_if_fail (item != NULL);
811 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
812 nr_return_if_fail (!mask || NR_IS_ARENA_ITEM (mask));
814 if (mask != item->mask) {
815 nr_arena_item_request_render (item);
816 if (item->mask)
817 item->mask = nr_arena_item_detach (item, item->mask);
818 if (mask)
819 item->mask = nr_arena_item_attach (item, mask, NULL, NULL);
820 nr_arena_item_request_update (item, NR_ARENA_ITEM_STATE_ALL, TRUE);
821 }
822 }
824 void
825 nr_arena_item_set_order (NRArenaItem *item, int order)
826 {
827 nr_return_if_fail (item != NULL);
828 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
830 if (!item->parent)
831 return;
833 NRArenaItem *children = nr_arena_item_children (item->parent);
835 NRArenaItem *ref = NULL;
836 int pos = 0;
837 for (NRArenaItem *child = children; child != NULL; child = child->next) {
838 if (pos >= order)
839 break;
840 if (child != item) {
841 ref = child;
842 pos += 1;
843 }
844 }
846 nr_arena_item_set_child_position (item->parent, item, ref);
847 }
849 void
850 nr_arena_item_set_item_bbox (NRArenaItem *item, Geom::OptRect &bbox)
851 {
852 nr_return_if_fail(item != NULL);
853 nr_return_if_fail(NR_IS_ARENA_ITEM(item));
855 item->item_bbox = bbox;
856 }
858 /** Returns a background image for use with filter effects. */
859 NRPixBlock *
860 nr_arena_item_get_background (NRArenaItem const *item, int depth)
861 {
862 NRPixBlock *pb;
863 if (!item->background_pb)
864 return NULL;
865 if (item->background_new) {
866 pb = new NRPixBlock ();
867 nr_pixblock_setup_fast (pb, item->background_pb->mode,
868 item->background_pb->area.x0,
869 item->background_pb->area.y0,
870 item->background_pb->area.x1,
871 item->background_pb->area.y1, true);
872 if (pb->size != NR_PIXBLOCK_SIZE_TINY && pb->data.px == NULL) // allocation failed
873 return NULL;
874 } else if (item->parent) {
875 pb = nr_arena_item_get_background (item->parent, depth + 1);
876 } else
877 return NULL;
879 if (depth > 0)
880 nr_blit_pixblock_pixblock (pb, item->background_pb);
882 return pb;
883 }
885 /* Helpers */
887 NRArenaItem *
888 nr_arena_item_attach (NRArenaItem *parent, NRArenaItem *child,
889 NRArenaItem *prev, NRArenaItem *next)
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 == NULL, NULL);
896 nr_return_val_if_fail (child->prev == NULL, NULL);
897 nr_return_val_if_fail (child->next == NULL, NULL);
898 nr_return_val_if_fail (!prev || NR_IS_ARENA_ITEM (prev), NULL);
899 nr_return_val_if_fail (!prev || (prev->parent == parent), NULL);
900 nr_return_val_if_fail (!prev || (prev->next == next), NULL);
901 nr_return_val_if_fail (!next || NR_IS_ARENA_ITEM (next), NULL);
902 nr_return_val_if_fail (!next || (next->parent == parent), NULL);
903 nr_return_val_if_fail (!next || (next->prev == prev), NULL);
905 child->parent = parent;
906 child->prev = prev;
907 child->next = next;
909 if (prev)
910 prev->next = child;
911 if (next)
912 next->prev = child;
914 return child;
915 }
917 NRArenaItem *
918 nr_arena_item_detach (NRArenaItem *parent, NRArenaItem *child)
919 {
920 nr_return_val_if_fail (parent != NULL, NULL);
921 nr_return_val_if_fail (NR_IS_ARENA_ITEM (parent), NULL);
922 nr_return_val_if_fail (child != NULL, NULL);
923 nr_return_val_if_fail (NR_IS_ARENA_ITEM (child), NULL);
924 nr_return_val_if_fail (child->parent == parent, NULL);
926 NRArenaItem *prev = child->prev;
927 NRArenaItem *next = child->next;
929 child->parent = NULL;
930 child->prev = NULL;
931 child->next = NULL;
933 if (prev)
934 prev->next = next;
935 if (next)
936 next->prev = prev;
938 return next;
939 }
941 /*
942 Local Variables:
943 mode:c++
944 c-file-style:"stroustrup"
945 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
946 indent-tabs-mode:nil
947 fill-column:99
948 End:
949 */
950 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :