b9a0cc371e6f19e445de19b26c73a08d3f023023
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 <libnr/nr-matrix-ops.h>
24 #include <libnr/nr-matrix-fns.h>
25 #include "nr-arena.h"
26 #include "nr-arena-item.h"
27 #include "gc-core.h"
28 #include "helper/geom.h"
30 #include "nr-filter.h"
31 #include "libnr/nr-rect.h"
32 #include "nr-arena-group.h"
33 #include "prefs-utils.h"
35 namespace GC = Inkscape::GC;
37 static void nr_arena_item_class_init (NRArenaItemClass *klass);
38 static void nr_arena_item_init (NRArenaItem *item);
39 static void nr_arena_item_private_finalize (NRObject *object);
41 static NRObjectClass *parent_class;
43 NRType
44 nr_arena_item_get_type (void)
45 {
46 static NRType type = 0;
47 if (!type) {
48 type = nr_object_register_type (NR_TYPE_OBJECT,
49 "NRArenaItem",
50 sizeof (NRArenaItemClass),
51 sizeof (NRArenaItem),
52 (void (*)(NRObjectClass *))
53 nr_arena_item_class_init,
54 (void (*)(NRObject *))
55 nr_arena_item_init);
56 }
57 return type;
58 }
60 static void
61 nr_arena_item_class_init (NRArenaItemClass *klass)
62 {
63 NRObjectClass *object_class;
65 object_class = (NRObjectClass *) klass;
67 parent_class = ((NRObjectClass *) klass)->parent;
69 object_class->finalize = nr_arena_item_private_finalize;
70 object_class->cpp_ctor = NRObject::invoke_ctor < NRArenaItem >;
71 }
73 static void
74 nr_arena_item_init (NRArenaItem *item)
75 {
76 item->arena = NULL;
77 item->parent = NULL;
78 item->next = item->prev = NULL;
80 item->key = 0;
82 item->state = 0;
83 item->sensitive = TRUE;
84 item->visible = TRUE;
86 memset (&item->bbox, 0, sizeof (item->bbox));
87 item->transform = NULL;
88 item->opacity = 255;
89 item->render_opacity = FALSE;
91 item->transform = NULL;
92 item->clip = NULL;
93 item->mask = NULL;
94 item->px = NULL;
95 item->data = NULL;
96 item->filter = NULL;
97 item->background_pb = NULL;
98 item->background_new = false;
99 }
101 static void
102 nr_arena_item_private_finalize (NRObject *object)
103 {
104 NRArenaItem *item = static_cast < NRArenaItem * >(object);
106 item->px = NULL;
107 item->transform = NULL;
109 ((NRObjectClass *) (parent_class))->finalize (object);
110 }
112 NRArenaItem *
113 nr_arena_item_children (NRArenaItem *item)
114 {
115 nr_return_val_if_fail (item != NULL, NULL);
116 nr_return_val_if_fail (NR_IS_ARENA_ITEM (item), NULL);
118 if (NR_ARENA_ITEM_VIRTUAL (item, children))
119 return NR_ARENA_ITEM_VIRTUAL (item, children) (item);
121 return NULL;
122 }
124 NRArenaItem *
125 nr_arena_item_last_child (NRArenaItem *item)
126 {
127 nr_return_val_if_fail (item != NULL, NULL);
128 nr_return_val_if_fail (NR_IS_ARENA_ITEM (item), NULL);
130 if (NR_ARENA_ITEM_VIRTUAL (item, last_child)) {
131 return NR_ARENA_ITEM_VIRTUAL (item, last_child) (item);
132 } else {
133 NRArenaItem *ref = nr_arena_item_children (item);
134 if (ref)
135 while (ref->next)
136 ref = ref->next;
137 return ref;
138 }
139 }
141 void
142 nr_arena_item_add_child (NRArenaItem *item, NRArenaItem *child,
143 NRArenaItem *ref)
144 {
145 nr_return_if_fail (item != NULL);
146 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
147 nr_return_if_fail (child != NULL);
148 nr_return_if_fail (NR_IS_ARENA_ITEM (child));
149 nr_return_if_fail (child->parent == NULL);
150 nr_return_if_fail (child->prev == NULL);
151 nr_return_if_fail (child->next == NULL);
152 nr_return_if_fail (child->arena == item->arena);
153 nr_return_if_fail (child != ref);
154 nr_return_if_fail (!ref || NR_IS_ARENA_ITEM (ref));
155 nr_return_if_fail (!ref || (ref->parent == item));
157 if (NR_ARENA_ITEM_VIRTUAL (item, add_child))
158 NR_ARENA_ITEM_VIRTUAL (item, add_child) (item, child, ref);
159 }
161 void
162 nr_arena_item_remove_child (NRArenaItem *item, NRArenaItem *child)
163 {
164 nr_return_if_fail (item != NULL);
165 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
166 nr_return_if_fail (child != NULL);
167 nr_return_if_fail (NR_IS_ARENA_ITEM (child));
168 nr_return_if_fail (child->parent == item);
170 if (NR_ARENA_ITEM_VIRTUAL (item, remove_child))
171 NR_ARENA_ITEM_VIRTUAL (item, remove_child) (item, child);
172 }
174 void
175 nr_arena_item_set_child_position (NRArenaItem *item, NRArenaItem *child,
176 NRArenaItem *ref)
177 {
178 nr_return_if_fail (item != NULL);
179 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
180 nr_return_if_fail (child != NULL);
181 nr_return_if_fail (NR_IS_ARENA_ITEM (child));
182 nr_return_if_fail (child->parent == item);
183 nr_return_if_fail (!ref || NR_IS_ARENA_ITEM (ref));
184 nr_return_if_fail (!ref || (ref->parent == item));
186 if (NR_ARENA_ITEM_VIRTUAL (item, set_child_position))
187 NR_ARENA_ITEM_VIRTUAL (item, set_child_position) (item, child, ref);
188 }
190 NRArenaItem *
191 nr_arena_item_ref (NRArenaItem *item)
192 {
193 nr_object_ref ((NRObject *) item);
195 return item;
196 }
198 NRArenaItem *
199 nr_arena_item_unref (NRArenaItem *item)
200 {
201 nr_object_unref ((NRObject *) item);
203 return NULL;
204 }
206 unsigned int
207 nr_arena_item_invoke_update (NRArenaItem *item, NRRectL *area, NRGC *gc,
208 unsigned int state, unsigned int reset)
209 {
210 NRGC childgc (gc);
211 bool filter = (item->arena->rendermode == Inkscape::RENDERMODE_NORMAL);
213 nr_return_val_if_fail (item != NULL, NR_ARENA_ITEM_STATE_INVALID);
214 nr_return_val_if_fail (NR_IS_ARENA_ITEM (item),
215 NR_ARENA_ITEM_STATE_INVALID);
216 nr_return_val_if_fail (!(state & NR_ARENA_ITEM_STATE_INVALID),
217 NR_ARENA_ITEM_STATE_INVALID);
219 #ifdef NR_ARENA_ITEM_DEBUG_CASCADE
220 printf ("Update %s:%p %x %x %x\n",
221 nr_type_name_from_instance ((GTypeInstance *) item), item, state,
222 item->state, reset);
223 #endif
225 /* return if in error */
226 if (item->state & NR_ARENA_ITEM_STATE_INVALID)
227 return item->state;
228 /* Set reset flags according to propagation status */
229 if (item->propagate) {
230 reset |= ~item->state;
231 item->propagate = FALSE;
232 }
233 /* Reset our state */
234 item->state &= ~reset;
235 /* Return if NOP */
236 if (!(~item->state & state))
237 return item->state;
238 /* Test whether to return immediately */
239 if (area && (item->state & NR_ARENA_ITEM_STATE_BBOX)) {
240 if (!nr_rect_l_test_intersect_ptr(area, &item->bbox))
241 return item->state;
242 }
244 /* Reset image cache, if not to be kept */
245 if (!(item->state & NR_ARENA_ITEM_STATE_IMAGE) && (item->px)) {
246 item->px = NULL;
247 }
249 /* Set up local gc */
250 childgc = *gc;
251 if (item->transform) {
252 childgc.transform = (*item->transform) * childgc.transform;
253 }
254 /* Remember the transformation matrix */
255 item->ctm = childgc.transform;
257 /* Invoke the real method */
258 item->state =
259 NR_ARENA_ITEM_VIRTUAL (item, update) (item, area, &childgc, state,
260 reset);
261 if (item->state & NR_ARENA_ITEM_STATE_INVALID)
262 return item->state;
263 /* Enlarge the bounding box to contain filter effects */
264 if (item->filter && filter) {
265 item->filter->bbox_enlarge (item->bbox);
266 }
267 // fixme: to fix the display glitches, in outline mode bbox must be a combination of
268 // full item bbox and its clip and mask (after we have the API to get these)
270 /* Clipping */
271 if (item->clip) {
272 // FIXME: since here we only need bbox, consider passing
273 // ((state & !(NR_ARENA_ITEM_STATE_RENDER)) | NR_ARENA_ITEM_STATE_BBOX)
274 // instead of state, so it does not have to create rendering structures in nr_arena_shape_update
275 unsigned int newstate = nr_arena_item_invoke_update (item->clip, area, &childgc, state, reset);
276 if (newstate & NR_ARENA_ITEM_STATE_INVALID) {
277 item->state |= NR_ARENA_ITEM_STATE_INVALID;
278 return item->state;
279 }
280 nr_rect_l_intersect (&item->bbox, &item->bbox, &item->clip->bbox);
281 }
282 /* Masking */
283 if (item->mask) {
284 unsigned int newstate = nr_arena_item_invoke_update (item->mask, area, &childgc, state, reset);
285 if (newstate & NR_ARENA_ITEM_STATE_INVALID) {
286 item->state |= NR_ARENA_ITEM_STATE_INVALID;
287 return item->state;
288 }
289 nr_rect_l_intersect (&item->bbox, &item->bbox, &item->mask->bbox);
290 }
292 return item->state;
293 }
295 /**
296 * Render item to pixblock.
297 *
298 * \return Has NR_ARENA_ITEM_STATE_RENDER set on success.
299 */
301 unsigned int
302 nr_arena_item_invoke_render (cairo_t *ct, NRArenaItem *item, NRRectL const *area,
303 NRPixBlock *pb, unsigned int flags)
304 {
305 bool outline = (item->arena->rendermode == Inkscape::RENDERMODE_OUTLINE);
306 bool filter = (item->arena->rendermode == Inkscape::RENDERMODE_NORMAL);
308 nr_return_val_if_fail (item != NULL, NR_ARENA_ITEM_STATE_INVALID);
309 nr_return_val_if_fail (NR_IS_ARENA_ITEM (item),
310 NR_ARENA_ITEM_STATE_INVALID);
311 nr_return_val_if_fail (item->state & NR_ARENA_ITEM_STATE_BBOX,
312 item->state);
314 #ifdef NR_ARENA_ITEM_VERBOSE
315 printf ("Invoke render %p: %d %d - %d %d\n", item, area->x0, area->y0,
316 area->x1, area->y1);
317 #endif
319 /* If we are outside bbox just return successfully */
320 if (!item->visible)
321 return item->state | NR_ARENA_ITEM_STATE_RENDER;
323 NRRectL carea;
324 nr_rect_l_intersect (&carea, area, &item->bbox);
325 if (nr_rect_l_test_empty(carea))
326 return item->state | NR_ARENA_ITEM_STATE_RENDER;
327 if (item->filter && filter) {
328 item->filter->area_enlarge (carea, item->ctm);
329 nr_rect_l_intersect (&carea, &carea, &item->bbox);
330 }
332 if (outline) {
333 // No caching in outline mode for now; investigate if it really gives any advantage with cairo.
334 // Also no attempts to clip anything; just render everything: item, clip, mask
335 // First, render the object itself
336 unsigned int state = NR_ARENA_ITEM_VIRTUAL (item, render) (ct, item, &carea, pb, flags);
337 if (state & NR_ARENA_ITEM_STATE_INVALID) {
338 /* Clean up and return error */
339 item->state |= NR_ARENA_ITEM_STATE_INVALID;
340 return item->state;
341 }
343 // render clip and mask, if any
344 guint32 saved_rgba = item->arena->outlinecolor; // save current outline color
345 // render clippath as an object, using a different color
346 if (item->clip) {
347 item->arena->outlinecolor = prefs_get_int_attribute("options.wireframecolors", "clips", 0x00ff00ff); // green clips
348 NR_ARENA_ITEM_VIRTUAL (item->clip, render) (ct, item->clip, &carea, pb, flags);
349 }
350 // render mask as an object, using a different color
351 if (item->mask) {
352 item->arena->outlinecolor = prefs_get_int_attribute("options.wireframecolors", "masks", 0x0000ffff); // blue masks
353 NR_ARENA_ITEM_VIRTUAL (item->mask, render) (ct, item->mask, &carea, pb, flags);
354 }
355 item->arena->outlinecolor = saved_rgba; // restore outline color
357 return item->state | NR_ARENA_ITEM_STATE_RENDER;
358 }
360 NRPixBlock cpb;
361 if (item->px) {
362 /* Has cache pixblock, render this and return */
363 nr_pixblock_setup_extern (&cpb, NR_PIXBLOCK_MODE_R8G8B8A8P,
364 /* fixme: This probably cannot overflow, because we render only if visible */
365 /* fixme: and pixel cache is there only for small items */
366 /* fixme: But this still needs extra check (Lauris) */
367 item->bbox.x0, item->bbox.y0,
368 item->bbox.x1, item->bbox.y1,
369 item->px,
370 4 * (item->bbox.x1 - item->bbox.x0), FALSE,
371 FALSE);
372 nr_blit_pixblock_pixblock (pb, &cpb);
373 nr_pixblock_release (&cpb);
374 pb->empty = FALSE;
375 return item->state | NR_ARENA_ITEM_STATE_RENDER;
376 }
378 NRPixBlock *dpb = pb;
380 /* Setup cache if we can */
381 if ((!(flags & NR_ARENA_ITEM_RENDER_NO_CACHE)) &&
382 (carea.x0 <= item->bbox.x0) && (carea.y0 <= item->bbox.y0) &&
383 (carea.x1 >= item->bbox.x1) && (carea.y1 >= item->bbox.y1) &&
384 (((item->bbox.x1 - item->bbox.x0) * (item->bbox.y1 -
385 item->bbox.y0)) <= 4096)) {
386 // Item bbox is fully in renderable area and size is acceptable
387 carea.x0 = item->bbox.x0;
388 carea.y0 = item->bbox.y0;
389 carea.x1 = item->bbox.x1;
390 carea.y1 = item->bbox.y1;
391 item->px =
392 new (GC::ATOMIC) unsigned char[4 * (carea.x1 - carea.x0) *
393 (carea.y1 - carea.y0)];
394 nr_pixblock_setup_extern (&cpb, NR_PIXBLOCK_MODE_R8G8B8A8P, carea.x0,
395 carea.y0, carea.x1, carea.y1, item->px,
396 4 * (carea.x1 - carea.x0), TRUE, TRUE);
397 cpb.visible_area = pb->visible_area;
398 dpb = &cpb;
399 // Set nocache flag for downstream rendering
400 flags |= NR_ARENA_ITEM_RENDER_NO_CACHE;
401 }
403 /* Determine, whether we need temporary buffer */
404 if (item->clip || item->mask
405 || ((item->opacity != 255) && !item->render_opacity)
406 || (item->filter && filter) || item->background_new
407 || (item->parent && item->parent->background_pb)) {
409 /* Setup and render item buffer */
410 NRPixBlock ipb;
411 nr_pixblock_setup_fast (&ipb, NR_PIXBLOCK_MODE_R8G8B8A8P,
412 carea.x0, carea.y0, carea.x1, carea.y1,
413 TRUE);
415 // if memory allocation failed, abort render
416 if (ipb.size != NR_PIXBLOCK_SIZE_TINY && ipb.data.px == NULL) {
417 nr_pixblock_release (&ipb);
418 return (item->state);
419 }
421 /* If background access is used, save the pixblock address.
422 * This address is set to NULL at the end of this block */
423 if (item->background_new ||
424 (item->parent && item->parent->background_pb)) {
425 item->background_pb = &ipb;
426 }
428 ipb.visible_area = pb->visible_area;
429 if (item->filter && filter) {
430 item->filter->area_enlarge (ipb.visible_area, item->ctm);
431 }
433 unsigned int state = NR_ARENA_ITEM_VIRTUAL (item, render) (ct, item, &carea, &ipb, flags);
434 if (state & NR_ARENA_ITEM_STATE_INVALID) {
435 /* Clean up and return error */
436 nr_pixblock_release (&ipb);
437 if (dpb != pb)
438 nr_pixblock_release (dpb);
439 item->state |= NR_ARENA_ITEM_STATE_INVALID;
440 return item->state;
441 }
442 ipb.empty = FALSE;
444 /* Run filtering, if a filter is set for this object */
445 if (item->filter && filter) {
446 item->filter->render (item, &ipb);
447 }
449 if (item->clip || item->mask) {
450 /* Setup mask pixblock */
451 NRPixBlock mpb;
452 nr_pixblock_setup_fast (&mpb, NR_PIXBLOCK_MODE_A8, carea.x0,
453 carea.y0, carea.x1, carea.y1, TRUE);
455 if (mpb.data.px != NULL) { // if memory allocation was successful
457 mpb.visible_area = pb->visible_area;
458 /* Do clip if needed */
459 if (item->clip) {
460 state = nr_arena_item_invoke_clip (item->clip, &carea, &mpb);
461 if (state & NR_ARENA_ITEM_STATE_INVALID) {
462 /* Clean up and return error */
463 nr_pixblock_release (&mpb);
464 nr_pixblock_release (&ipb);
465 if (dpb != pb)
466 nr_pixblock_release (dpb);
467 item->state |= NR_ARENA_ITEM_STATE_INVALID;
468 return item->state;
469 }
470 mpb.empty = FALSE;
471 }
472 /* Do mask if needed */
473 if (item->mask) {
474 NRPixBlock tpb;
475 /* Set up yet another temporary pixblock */
476 nr_pixblock_setup_fast (&tpb, NR_PIXBLOCK_MODE_R8G8B8A8N,
477 carea.x0, carea.y0, carea.x1,
478 carea.y1, TRUE);
480 if (tpb.data.px != NULL) { // if memory allocation was successful
482 tpb.visible_area = pb->visible_area;
483 unsigned int state = NR_ARENA_ITEM_VIRTUAL (item->mask, render) (ct, item->mask, &carea, &tpb, flags);
484 if (state & NR_ARENA_ITEM_STATE_INVALID) {
485 /* Clean up and return error */
486 nr_pixblock_release (&tpb);
487 nr_pixblock_release (&mpb);
488 nr_pixblock_release (&ipb);
489 if (dpb != pb)
490 nr_pixblock_release (dpb);
491 item->state |= NR_ARENA_ITEM_STATE_INVALID;
492 return item->state;
493 }
494 /* Composite with clip */
495 if (item->clip) {
496 int x, y;
497 for (y = carea.y0; y < carea.y1; y++) {
498 unsigned char *s, *d;
499 s = NR_PIXBLOCK_PX (&tpb) + (y -
500 carea.y0) * tpb.rs;
501 d = NR_PIXBLOCK_PX (&mpb) + (y -
502 carea.y0) * mpb.rs;
503 for (x = carea.x0; x < carea.x1; x++) {
504 unsigned int m;
505 m = NR_PREMUL_112 (s[0] + s[1] + s[2], s[3]);
506 d[0] =
507 FAST_DIV_ROUND < 3 * 255 * 255 >
508 (NR_PREMUL_123 (d[0], m));
509 s += 4;
510 d += 1;
511 }
512 }
513 } else {
514 int x, y;
515 for (y = carea.y0; y < carea.y1; y++) {
516 unsigned char *s, *d;
517 s = NR_PIXBLOCK_PX (&tpb) + (y -
518 carea.y0) * tpb.rs;
519 d = NR_PIXBLOCK_PX (&mpb) + (y -
520 carea.y0) * mpb.rs;
521 for (x = carea.x0; x < carea.x1; x++) {
522 unsigned int m;
523 m = NR_PREMUL_112 (s[0] + s[1] + s[2], s[3]);
524 d[0] = FAST_DIV_ROUND < 3 * 255 > (m);
525 s += 4;
526 d += 1;
527 }
528 }
529 mpb.empty = FALSE;
530 }
531 }
532 nr_pixblock_release (&tpb);
533 }
534 /* Multiply with opacity if needed */
535 if ((item->opacity != 255) && !item->render_opacity
536 ) {
537 int x, y;
538 unsigned int a;
539 a = item->opacity;
540 for (y = carea.y0; y < carea.y1; y++) {
541 unsigned char *d;
542 d = NR_PIXBLOCK_PX (&mpb) + (y - carea.y0) * mpb.rs;
543 for (x = carea.x0; x < carea.x1; x++) {
544 d[0] = NR_PREMUL_111 (d[0], a);
545 d += 1;
546 }
547 }
548 }
549 /* Compose rendering pixblock int destination */
550 nr_blit_pixblock_pixblock_mask (dpb, &ipb, &mpb);
551 }
552 nr_pixblock_release (&mpb);
553 } else {
554 if (item->render_opacity) { // opacity was already rendered in, just copy to dpb here
555 nr_blit_pixblock_pixblock(dpb, &ipb);
556 } else { // copy while multiplying by opacity
557 nr_blit_pixblock_pixblock_alpha (dpb, &ipb, item->opacity);
558 }
559 }
560 nr_pixblock_release (&ipb);
561 dpb->empty = FALSE;
562 /* This pointer wouldn't be valid outside this block, so clear it */
563 item->background_pb = NULL;
564 } else {
565 /* Just render */
566 unsigned int state = NR_ARENA_ITEM_VIRTUAL (item, render) (ct, item, &carea, dpb, flags);
567 if (state & NR_ARENA_ITEM_STATE_INVALID) {
568 /* Clean up and return error */
569 if (dpb != pb)
570 nr_pixblock_release (dpb);
571 item->state |= NR_ARENA_ITEM_STATE_INVALID;
572 return item->state;
573 }
574 dpb->empty = FALSE;
575 }
577 if (dpb != pb) {
578 /* Have to blit from cache */
579 nr_blit_pixblock_pixblock (pb, dpb);
580 nr_pixblock_release (dpb);
581 pb->empty = FALSE;
582 item->state |= NR_ARENA_ITEM_STATE_IMAGE;
583 }
585 return item->state | NR_ARENA_ITEM_STATE_RENDER;
586 }
588 unsigned int
589 nr_arena_item_invoke_clip (NRArenaItem *item, NRRectL *area, NRPixBlock *pb)
590 {
591 nr_return_val_if_fail (item != NULL, NR_ARENA_ITEM_STATE_INVALID);
592 nr_return_val_if_fail (NR_IS_ARENA_ITEM (item),
593 NR_ARENA_ITEM_STATE_INVALID);
594 /* we originally short-circuited if the object state included
595 * NR_ARENA_ITEM_STATE_CLIP (and showed a warning on the console);
596 * anyone know why we stopped doing so?
597 */
598 nr_return_val_if_fail ((pb->area.x1 - pb->area.x0) >=
599 (area->x1 - area->x0),
600 NR_ARENA_ITEM_STATE_INVALID);
601 nr_return_val_if_fail ((pb->area.y1 - pb->area.y0) >=
602 (area->y1 - area->y0),
603 NR_ARENA_ITEM_STATE_INVALID);
605 #ifdef NR_ARENA_ITEM_VERBOSE
606 printf ("Invoke clip by %p: %d %d - %d %d, item bbox %d %d - %d %d\n",
607 item, area->x0, area->y0, area->x1, area->y1, (&item->bbox)->x0,
608 (&item->bbox)->y0, (&item->bbox)->x1, (&item->bbox)->y1);
609 #endif
611 if (item->visible && nr_rect_l_test_intersect_ptr(area, &item->bbox)) {
612 /* Need render that item */
613 if (((NRArenaItemClass *) NR_OBJECT_GET_CLASS (item))->clip) {
614 return ((NRArenaItemClass *) NR_OBJECT_GET_CLASS (item))->
615 clip (item, area, pb);
616 }
617 }
619 return item->state;
620 }
622 NRArenaItem *
623 nr_arena_item_invoke_pick (NRArenaItem *item, Geom::Point p, double delta,
624 unsigned int sticky)
625 {
626 nr_return_val_if_fail (item != NULL, NULL);
627 nr_return_val_if_fail (NR_IS_ARENA_ITEM (item), NULL);
629 // Sometimes there's no BBOX in item->state, reason unknown (bug 992817); I made this not an assert to remove the warning
630 if (!(item->state & NR_ARENA_ITEM_STATE_BBOX)
631 || !(item->state & NR_ARENA_ITEM_STATE_PICK))
632 return NULL;
634 if (!sticky && !(item->visible && item->sensitive))
635 return NULL;
637 // TODO: rewrite using Geom::Rect
638 const double x = p[Geom::X];
639 const double y = p[Geom::Y];
641 if (((x + delta) >= item->bbox.x0) &&
642 ((x - delta) < item->bbox.x1) &&
643 ((y + delta) >= item->bbox.y0) && ((y - delta) < item->bbox.y1)) {
644 if (((NRArenaItemClass *) NR_OBJECT_GET_CLASS (item))->pick)
645 return ((NRArenaItemClass *) NR_OBJECT_GET_CLASS (item))->
646 pick (item, p, delta, sticky);
647 }
649 return NULL;
650 }
652 void
653 nr_arena_item_request_update (NRArenaItem *item, unsigned int reset,
654 unsigned int propagate)
655 {
656 nr_return_if_fail (item != NULL);
657 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
658 nr_return_if_fail (!(reset & NR_ARENA_ITEM_STATE_INVALID));
660 if (propagate && !item->propagate)
661 item->propagate = TRUE;
663 if (item->state & reset) {
664 item->state &= ~reset;
665 if (item->parent) {
666 nr_arena_item_request_update (item->parent, reset, FALSE);
667 } else {
668 nr_arena_request_update (item->arena, item);
669 }
670 }
671 }
673 void
674 nr_arena_item_request_render (NRArenaItem *item)
675 {
676 nr_return_if_fail (item != NULL);
677 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
679 nr_arena_request_render_rect (item->arena, &item->bbox);
680 }
682 /* Public */
684 NRArenaItem *
685 nr_arena_item_unparent (NRArenaItem *item)
686 {
687 nr_return_val_if_fail (item != NULL, NULL);
688 nr_return_val_if_fail (NR_IS_ARENA_ITEM (item), NULL);
690 nr_arena_item_request_render (item);
692 if (item->parent) {
693 nr_arena_item_remove_child (item->parent, item);
694 }
696 return NULL;
697 }
699 void
700 nr_arena_item_append_child (NRArenaItem *parent, NRArenaItem *child)
701 {
702 nr_return_if_fail (parent != NULL);
703 nr_return_if_fail (NR_IS_ARENA_ITEM (parent));
704 nr_return_if_fail (child != NULL);
705 nr_return_if_fail (NR_IS_ARENA_ITEM (child));
706 nr_return_if_fail (parent->arena == child->arena);
707 nr_return_if_fail (child->parent == NULL);
708 nr_return_if_fail (child->prev == NULL);
709 nr_return_if_fail (child->next == NULL);
711 nr_arena_item_add_child (parent, child, nr_arena_item_last_child (parent));
712 }
714 void
715 nr_arena_item_set_transform (NRArenaItem *item, Geom::Matrix const &transform)
716 {
717 Geom::Matrix const t (transform);
718 nr_arena_item_set_transform (item, &t);
719 }
721 void
722 nr_arena_item_set_transform (NRArenaItem *item, Geom::Matrix const *transform)
723 {
724 nr_return_if_fail (item != NULL);
725 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
727 if (!transform && !item->transform)
728 return;
730 const Geom::Matrix *md = (item->transform) ? item->transform : &GEOM_MATRIX_IDENTITY;
731 const Geom::Matrix *ms = (transform) ? transform : &GEOM_MATRIX_IDENTITY;
733 if (!Geom::matrix_equalp(*md, *ms, NR_EPSILON)) {
734 nr_arena_item_request_render (item);
735 if (!transform || transform->isIdentity()) {
736 /* Set to identity affine */
737 item->transform = NULL;
738 } else {
739 if (!item->transform)
740 item->transform = new (GC::ATOMIC) Geom::Matrix ();
741 *item->transform = *transform;
742 }
743 nr_arena_item_request_update (item, NR_ARENA_ITEM_STATE_ALL, TRUE);
744 }
745 }
747 void
748 nr_arena_item_set_opacity (NRArenaItem *item, double opacity)
749 {
750 nr_return_if_fail (item != NULL);
751 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
753 nr_arena_item_request_render (item);
755 item->opacity = (unsigned int) (opacity * 255.9999);
756 }
758 void
759 nr_arena_item_set_sensitive (NRArenaItem *item, unsigned int sensitive)
760 {
761 nr_return_if_fail (item != NULL);
762 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
764 /* fixme: mess with pick/repick... */
766 item->sensitive = sensitive;
767 }
769 void
770 nr_arena_item_set_visible (NRArenaItem *item, unsigned int visible)
771 {
772 nr_return_if_fail (item != NULL);
773 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
775 item->visible = visible;
777 nr_arena_item_request_render (item);
778 }
780 void
781 nr_arena_item_set_clip (NRArenaItem *item, NRArenaItem *clip)
782 {
783 nr_return_if_fail (item != NULL);
784 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
785 nr_return_if_fail (!clip || NR_IS_ARENA_ITEM (clip));
787 if (clip != item->clip) {
788 nr_arena_item_request_render (item);
789 if (item->clip)
790 item->clip = nr_arena_item_detach (item, item->clip);
791 if (clip)
792 item->clip = nr_arena_item_attach (item, clip, NULL, NULL);
793 nr_arena_item_request_update (item, NR_ARENA_ITEM_STATE_ALL, TRUE);
794 }
795 }
797 void
798 nr_arena_item_set_mask (NRArenaItem *item, NRArenaItem *mask)
799 {
800 nr_return_if_fail (item != NULL);
801 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
802 nr_return_if_fail (!mask || NR_IS_ARENA_ITEM (mask));
804 if (mask != item->mask) {
805 nr_arena_item_request_render (item);
806 if (item->mask)
807 item->mask = nr_arena_item_detach (item, item->mask);
808 if (mask)
809 item->mask = nr_arena_item_attach (item, mask, NULL, NULL);
810 nr_arena_item_request_update (item, NR_ARENA_ITEM_STATE_ALL, TRUE);
811 }
812 }
814 void
815 nr_arena_item_set_order (NRArenaItem *item, int order)
816 {
817 nr_return_if_fail (item != NULL);
818 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
820 if (!item->parent)
821 return;
823 NRArenaItem *children = nr_arena_item_children (item->parent);
825 NRArenaItem *ref = NULL;
826 int pos = 0;
827 for (NRArenaItem *child = children; child != NULL; child = child->next) {
828 if (pos >= order)
829 break;
830 if (child != item) {
831 ref = child;
832 pos += 1;
833 }
834 }
836 nr_arena_item_set_child_position (item->parent, item, ref);
837 }
839 void
840 nr_arena_item_set_item_bbox (NRArenaItem *item, boost::optional<Geom::Rect> &bbox)
841 {
842 nr_return_if_fail(item != NULL);
843 nr_return_if_fail(NR_IS_ARENA_ITEM(item));
845 if(bbox) item->item_bbox = *bbox;
846 }
848 /** Returns a background image for use with filter effects. */
849 NRPixBlock *
850 nr_arena_item_get_background (NRArenaItem const *item, int depth)
851 {
852 NRPixBlock *pb;
853 if (!item->background_pb)
854 return NULL;
855 if (item->background_new) {
856 pb = new NRPixBlock ();
857 nr_pixblock_setup_fast (pb, item->background_pb->mode,
858 item->background_pb->area.x0,
859 item->background_pb->area.y0,
860 item->background_pb->area.x1,
861 item->background_pb->area.y1, true);
862 if (pb->size != NR_PIXBLOCK_SIZE_TINY && pb->data.px == NULL) // allocation failed
863 return NULL;
864 } else if (item->parent) {
865 pb = nr_arena_item_get_background (item->parent, depth + 1);
866 } else
867 return NULL;
869 if (depth > 0)
870 nr_blit_pixblock_pixblock (pb, item->background_pb);
872 return pb;
873 }
875 /* Helpers */
877 NRArenaItem *
878 nr_arena_item_attach (NRArenaItem *parent, NRArenaItem *child,
879 NRArenaItem *prev, NRArenaItem *next)
880 {
881 nr_return_val_if_fail (parent != NULL, NULL);
882 nr_return_val_if_fail (NR_IS_ARENA_ITEM (parent), NULL);
883 nr_return_val_if_fail (child != NULL, NULL);
884 nr_return_val_if_fail (NR_IS_ARENA_ITEM (child), NULL);
885 nr_return_val_if_fail (child->parent == NULL, NULL);
886 nr_return_val_if_fail (child->prev == NULL, NULL);
887 nr_return_val_if_fail (child->next == NULL, NULL);
888 nr_return_val_if_fail (!prev || NR_IS_ARENA_ITEM (prev), NULL);
889 nr_return_val_if_fail (!prev || (prev->parent == parent), NULL);
890 nr_return_val_if_fail (!prev || (prev->next == next), NULL);
891 nr_return_val_if_fail (!next || NR_IS_ARENA_ITEM (next), NULL);
892 nr_return_val_if_fail (!next || (next->parent == parent), NULL);
893 nr_return_val_if_fail (!next || (next->prev == prev), NULL);
895 child->parent = parent;
896 child->prev = prev;
897 child->next = next;
899 if (prev)
900 prev->next = child;
901 if (next)
902 next->prev = child;
904 return child;
905 }
907 NRArenaItem *
908 nr_arena_item_detach (NRArenaItem *parent, NRArenaItem *child)
909 {
910 nr_return_val_if_fail (parent != NULL, NULL);
911 nr_return_val_if_fail (NR_IS_ARENA_ITEM (parent), NULL);
912 nr_return_val_if_fail (child != NULL, NULL);
913 nr_return_val_if_fail (NR_IS_ARENA_ITEM (child), NULL);
914 nr_return_val_if_fail (child->parent == parent, NULL);
916 NRArenaItem *prev = child->prev;
917 NRArenaItem *next = child->next;
919 child->parent = NULL;
920 child->prev = NULL;
921 child->next = NULL;
923 if (prev)
924 prev->next = next;
925 if (next)
926 next->prev = prev;
928 return next;
929 }
931 /*
932 Local Variables:
933 mode:c++
934 c-file-style:"stroustrup"
935 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
936 indent-tabs-mode:nil
937 fill-column:99
938 End:
939 */
940 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :