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_OUTLINE &&
316 item->arena->rendermode != Inkscape::RENDERMODE_NO_FILTERS);
317 bool print_colors = (item->arena->rendermode == Inkscape::RENDERMODE_PRINT_COLORS_PREVIEW);
319 nr_return_val_if_fail (item != NULL, NR_ARENA_ITEM_STATE_INVALID);
320 nr_return_val_if_fail (NR_IS_ARENA_ITEM (item),
321 NR_ARENA_ITEM_STATE_INVALID);
322 nr_return_val_if_fail (item->state & NR_ARENA_ITEM_STATE_BBOX,
323 item->state);
325 #ifdef NR_ARENA_ITEM_VERBOSE
326 g_message ("Invoke render %p on %p: %d %d - %d %d, %d %d - %d %d", item, pb,
327 area->x0, area->y0,
328 area->x1, area->y1,
329 item->drawbox.x0, item->drawbox.y0,
330 item->drawbox.x1, item->drawbox.y1);
331 #endif
333 /* If we are invisible, just return successfully */
334 if (!item->visible)
335 return item->state | NR_ARENA_ITEM_STATE_RENDER;
337 NRRectL carea;
338 nr_rect_l_intersect (&carea, area, &item->drawbox);
339 if (nr_rect_l_test_empty(carea))
340 return item->state | NR_ARENA_ITEM_STATE_RENDER;
341 if (item->filter && filter) {
342 item->filter->area_enlarge (carea, item);
343 nr_rect_l_intersect (&carea, &carea, &item->drawbox);
344 }
346 if (outline) {
347 // No caching in outline mode for now; investigate if it really gives any advantage with cairo.
348 // Also no attempts to clip anything; just render everything: item, clip, mask
349 // First, render the object itself
350 unsigned int state = NR_ARENA_ITEM_VIRTUAL (item, render) (ct, item, &carea, pb, flags);
351 if (state & NR_ARENA_ITEM_STATE_INVALID) {
352 /* Clean up and return error */
353 item->state |= NR_ARENA_ITEM_STATE_INVALID;
354 return item->state;
355 }
357 // render clip and mask, if any
358 guint32 saved_rgba = item->arena->outlinecolor; // save current outline color
359 // render clippath as an object, using a different color
360 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
361 if (item->clip) {
362 item->arena->outlinecolor = prefs->getInt("/options/wireframecolors/clips", 0x00ff00ff); // green clips
363 NR_ARENA_ITEM_VIRTUAL (item->clip, render) (ct, item->clip, &carea, pb, flags);
364 }
365 // render mask as an object, using a different color
366 if (item->mask) {
367 item->arena->outlinecolor = prefs->getInt("/options/wireframecolors/masks", 0x0000ffff); // blue masks
368 NR_ARENA_ITEM_VIRTUAL (item->mask, render) (ct, item->mask, &carea, pb, flags);
369 }
370 item->arena->outlinecolor = saved_rgba; // restore outline color
372 return item->state | NR_ARENA_ITEM_STATE_RENDER;
373 }
375 NRPixBlock cpb;
376 if (item->px) {
377 /* Has cache pixblock, render this and return */
378 nr_pixblock_setup_extern (&cpb, NR_PIXBLOCK_MODE_R8G8B8A8P,
379 /* fixme: This probably cannot overflow, because we render only if visible */
380 /* fixme: and pixel cache is there only for small items */
381 /* fixme: But this still needs extra check (Lauris) */
382 item->drawbox.x0, item->drawbox.y0,
383 item->drawbox.x1, item->drawbox.y1,
384 item->px,
385 4 * (item->drawbox.x1 - item->drawbox.x0), FALSE,
386 FALSE);
387 nr_blit_pixblock_pixblock (pb, &cpb);
388 nr_pixblock_release (&cpb);
389 pb->empty = FALSE;
390 return item->state | NR_ARENA_ITEM_STATE_RENDER;
391 }
393 NRPixBlock *dpb = pb;
395 /* Setup cache if we can */
396 if ((!(flags & NR_ARENA_ITEM_RENDER_NO_CACHE)) &&
397 (carea.x0 <= item->drawbox.x0) && (carea.y0 <= item->drawbox.y0) &&
398 (carea.x1 >= item->drawbox.x1) && (carea.y1 >= item->drawbox.y1) &&
399 (((item->drawbox.x1 - item->drawbox.x0) * (item->drawbox.y1 -
400 item->drawbox.y0)) <= 4096)) {
401 // Item drawbox is fully in renderable area and size is acceptable
402 carea.x0 = item->drawbox.x0;
403 carea.y0 = item->drawbox.y0;
404 carea.x1 = item->drawbox.x1;
405 carea.y1 = item->drawbox.y1;
406 item->px =
407 new (GC::ATOMIC) unsigned char[4 * (carea.x1 - carea.x0) *
408 (carea.y1 - carea.y0)];
409 nr_pixblock_setup_extern (&cpb, NR_PIXBLOCK_MODE_R8G8B8A8P, carea.x0,
410 carea.y0, carea.x1, carea.y1, item->px,
411 4 * (carea.x1 - carea.x0), TRUE, TRUE);
412 cpb.visible_area = pb->visible_area;
413 dpb = &cpb;
414 // Set nocache flag for downstream rendering
415 flags |= NR_ARENA_ITEM_RENDER_NO_CACHE;
416 }
418 /* Determine, whether we need temporary buffer */
419 if (item->clip || item->mask
420 || ((item->opacity != 255) && !item->render_opacity)
421 || (item->filter && filter) || item->background_new) {
423 /* Setup and render item buffer */
424 NRPixBlock ipb;
425 nr_pixblock_setup_fast (&ipb, NR_PIXBLOCK_MODE_R8G8B8A8P,
426 carea.x0, carea.y0, carea.x1, carea.y1,
427 TRUE);
429 // if memory allocation failed, abort render
430 if (ipb.size != NR_PIXBLOCK_SIZE_TINY && ipb.data.px == NULL) {
431 nr_pixblock_release (&ipb);
432 return (item->state);
433 }
435 /* If background access is used, save the pixblock address.
436 * This address is set to NULL at the end of this block */
437 if (item->background_new) {
438 item->background_pb = &ipb;
439 }
441 ipb.visible_area = pb->visible_area;
442 if (item->filter && filter) {
443 item->filter->area_enlarge (ipb.visible_area, item);
444 }
446 unsigned int state = NR_ARENA_ITEM_VIRTUAL (item, render) (ct, item, &carea, &ipb, flags);
447 if (state & NR_ARENA_ITEM_STATE_INVALID) {
448 /* Clean up and return error */
449 nr_pixblock_release (&ipb);
450 if (dpb != pb)
451 nr_pixblock_release (dpb);
452 item->state |= NR_ARENA_ITEM_STATE_INVALID;
453 return item->state;
454 }
455 ipb.empty = FALSE;
457 /* Run filtering, if a filter is set for this object */
458 if (item->filter && filter) {
459 item->filter->render (item, &ipb);
460 }
462 if (item->clip || item->mask) {
463 /* Setup mask pixblock */
464 NRPixBlock mpb;
465 nr_pixblock_setup_fast (&mpb, NR_PIXBLOCK_MODE_A8, carea.x0,
466 carea.y0, carea.x1, carea.y1, TRUE);
468 if (mpb.data.px != NULL) { // if memory allocation was successful
470 mpb.visible_area = pb->visible_area;
471 /* Do clip if needed */
472 if (item->clip) {
473 state = nr_arena_item_invoke_clip (item->clip, &carea, &mpb);
474 if (state & NR_ARENA_ITEM_STATE_INVALID) {
475 /* Clean up and return error */
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 mpb.empty = FALSE;
484 }
485 /* Do mask if needed */
486 if (item->mask) {
487 NRPixBlock tpb;
488 /* Set up yet another temporary pixblock */
489 nr_pixblock_setup_fast (&tpb, NR_PIXBLOCK_MODE_R8G8B8A8N,
490 carea.x0, carea.y0, carea.x1,
491 carea.y1, TRUE);
493 if (tpb.data.px != NULL) { // if memory allocation was successful
495 tpb.visible_area = pb->visible_area;
496 unsigned int state = NR_ARENA_ITEM_VIRTUAL (item->mask, render) (ct, item->mask, &carea, &tpb, flags);
497 if (state & NR_ARENA_ITEM_STATE_INVALID) {
498 /* Clean up and return error */
499 nr_pixblock_release (&tpb);
500 nr_pixblock_release (&mpb);
501 nr_pixblock_release (&ipb);
502 if (dpb != pb)
503 nr_pixblock_release (dpb);
504 item->state |= NR_ARENA_ITEM_STATE_INVALID;
505 return item->state;
506 }
507 /* Composite with clip */
508 if (item->clip) {
509 int x, y;
510 for (y = carea.y0; y < carea.y1; y++) {
511 unsigned char *s, *d;
512 s = NR_PIXBLOCK_PX (&tpb) + (y -
513 carea.y0) * tpb.rs;
514 d = NR_PIXBLOCK_PX (&mpb) + (y -
515 carea.y0) * mpb.rs;
516 for (x = carea.x0; x < carea.x1; x++) {
517 unsigned int m;
518 m = NR_PREMUL_112 (s[0] + s[1] + s[2], s[3]);
519 d[0] =
520 FAST_DIV_ROUND < 3 * 255 * 255 >
521 (NR_PREMUL_123 (d[0], m));
522 s += 4;
523 d += 1;
524 }
525 }
526 } else {
527 int x, y;
528 for (y = carea.y0; y < carea.y1; y++) {
529 unsigned char *s, *d;
530 s = NR_PIXBLOCK_PX (&tpb) + (y -
531 carea.y0) * tpb.rs;
532 d = NR_PIXBLOCK_PX (&mpb) + (y -
533 carea.y0) * mpb.rs;
534 for (x = carea.x0; x < carea.x1; x++) {
535 unsigned int m;
536 m = NR_PREMUL_112 (s[0] + s[1] + s[2], s[3]);
537 d[0] = FAST_DIV_ROUND < 3 * 255 > (m);
538 s += 4;
539 d += 1;
540 }
541 }
542 mpb.empty = FALSE;
543 }
544 }
545 nr_pixblock_release (&tpb);
546 }
547 /* Multiply with opacity if needed */
548 if ((item->opacity != 255) && !item->render_opacity
549 ) {
550 int x, y;
551 unsigned int a;
552 a = item->opacity;
553 for (y = carea.y0; y < carea.y1; y++) {
554 unsigned char *d;
555 d = NR_PIXBLOCK_PX (&mpb) + (y - carea.y0) * mpb.rs;
556 for (x = carea.x0; x < carea.x1; x++) {
557 d[0] = NR_PREMUL_111 (d[0], a);
558 d += 1;
559 }
560 }
561 }
562 /* Compose rendering pixblock int destination */
563 nr_blit_pixblock_pixblock_mask (dpb, &ipb, &mpb);
564 }
565 nr_pixblock_release (&mpb);
566 } else {
567 if (item->render_opacity) { // opacity was already rendered in, just copy to dpb here
568 nr_blit_pixblock_pixblock(dpb, &ipb);
569 } else { // copy while multiplying by opacity
570 nr_blit_pixblock_pixblock_alpha (dpb, &ipb, item->opacity);
571 }
572 }
573 nr_pixblock_release (&ipb);
574 dpb->empty = FALSE;
575 /* This pointer wouldn't be valid outside this block, so clear it */
576 item->background_pb = NULL;
577 } else {
578 /* Just render */
579 unsigned int state = NR_ARENA_ITEM_VIRTUAL (item, render) (ct, item, &carea, dpb, flags);
580 if (state & NR_ARENA_ITEM_STATE_INVALID) {
581 /* Clean up and return error */
582 if (dpb != pb)
583 nr_pixblock_release (dpb);
584 item->state |= NR_ARENA_ITEM_STATE_INVALID;
585 return item->state;
586 }
587 dpb->empty = FALSE;
588 }
590 if (dpb != pb) {
591 /* Have to blit from cache */
592 nr_blit_pixblock_pixblock (pb, dpb);
593 nr_pixblock_release (dpb);
594 pb->empty = FALSE;
595 item->state |= NR_ARENA_ITEM_STATE_IMAGE;
596 }
598 return item->state | NR_ARENA_ITEM_STATE_RENDER;
599 }
601 unsigned int
602 nr_arena_item_invoke_clip (NRArenaItem *item, NRRectL *area, NRPixBlock *pb)
603 {
604 nr_return_val_if_fail (item != NULL, NR_ARENA_ITEM_STATE_INVALID);
605 nr_return_val_if_fail (NR_IS_ARENA_ITEM (item),
606 NR_ARENA_ITEM_STATE_INVALID);
607 /* we originally short-circuited if the object state included
608 * NR_ARENA_ITEM_STATE_CLIP (and showed a warning on the console);
609 * anyone know why we stopped doing so?
610 */
611 nr_return_val_if_fail ((pb->area.x1 - pb->area.x0) >=
612 (area->x1 - area->x0),
613 NR_ARENA_ITEM_STATE_INVALID);
614 nr_return_val_if_fail ((pb->area.y1 - pb->area.y0) >=
615 (area->y1 - area->y0),
616 NR_ARENA_ITEM_STATE_INVALID);
618 #ifdef NR_ARENA_ITEM_VERBOSE
619 printf ("Invoke clip by %p: %d %d - %d %d, item bbox %d %d - %d %d\n",
620 item, area->x0, area->y0, area->x1, area->y1, (&item->bbox)->x0,
621 (&item->bbox)->y0, (&item->bbox)->x1, (&item->bbox)->y1);
622 #endif
624 if (item->visible && nr_rect_l_test_intersect_ptr(area, &item->bbox)) {
625 /* Need render that item */
626 if (((NRArenaItemClass *) NR_OBJECT_GET_CLASS (item))->clip) {
627 return ((NRArenaItemClass *) NR_OBJECT_GET_CLASS (item))->
628 clip (item, area, pb);
629 }
630 }
632 return item->state;
633 }
635 NRArenaItem *
636 nr_arena_item_invoke_pick (NRArenaItem *item, Geom::Point p, double delta,
637 unsigned int sticky)
638 {
639 nr_return_val_if_fail (item != NULL, NULL);
640 nr_return_val_if_fail (NR_IS_ARENA_ITEM (item), NULL);
642 // Sometimes there's no BBOX in item->state, reason unknown (bug 992817); I made this not an assert to remove the warning
643 if (!(item->state & NR_ARENA_ITEM_STATE_BBOX)
644 || !(item->state & NR_ARENA_ITEM_STATE_PICK))
645 return NULL;
647 if (!sticky && !(item->visible && item->sensitive))
648 return NULL;
650 // TODO: rewrite using Geom::Rect
651 const double x = p[Geom::X];
652 const double y = p[Geom::Y];
654 if (((x + delta) >= item->bbox.x0) &&
655 ((x - delta) < item->bbox.x1) &&
656 ((y + delta) >= item->bbox.y0) && ((y - delta) < item->bbox.y1)) {
657 if (((NRArenaItemClass *) NR_OBJECT_GET_CLASS (item))->pick)
658 return ((NRArenaItemClass *) NR_OBJECT_GET_CLASS (item))->
659 pick (item, p, delta, sticky);
660 }
662 return NULL;
663 }
665 void
666 nr_arena_item_request_update (NRArenaItem *item, unsigned int reset,
667 unsigned int propagate)
668 {
669 nr_return_if_fail (item != NULL);
670 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
671 nr_return_if_fail (!(reset & NR_ARENA_ITEM_STATE_INVALID));
673 if (propagate && !item->propagate)
674 item->propagate = TRUE;
676 if (item->state & reset) {
677 item->state &= ~reset;
678 if (item->parent) {
679 nr_arena_item_request_update (item->parent, reset, FALSE);
680 } else {
681 nr_arena_request_update (item->arena, item);
682 }
683 }
684 }
686 void
687 nr_arena_item_request_render (NRArenaItem *item)
688 {
689 nr_return_if_fail (item != NULL);
690 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
692 nr_arena_request_render_rect (item->arena, &item->drawbox);
693 }
695 /* Public */
697 NRArenaItem *
698 nr_arena_item_unparent (NRArenaItem *item)
699 {
700 nr_return_val_if_fail (item != NULL, NULL);
701 nr_return_val_if_fail (NR_IS_ARENA_ITEM (item), NULL);
703 nr_arena_item_request_render (item);
705 if (item->parent) {
706 nr_arena_item_remove_child (item->parent, item);
707 }
709 return NULL;
710 }
712 void
713 nr_arena_item_append_child (NRArenaItem *parent, NRArenaItem *child)
714 {
715 nr_return_if_fail (parent != NULL);
716 nr_return_if_fail (NR_IS_ARENA_ITEM (parent));
717 nr_return_if_fail (child != NULL);
718 nr_return_if_fail (NR_IS_ARENA_ITEM (child));
719 nr_return_if_fail (parent->arena == child->arena);
720 nr_return_if_fail (child->parent == NULL);
721 nr_return_if_fail (child->prev == NULL);
722 nr_return_if_fail (child->next == NULL);
724 nr_arena_item_add_child (parent, child, nr_arena_item_last_child (parent));
725 }
727 void
728 nr_arena_item_set_transform (NRArenaItem *item, Geom::Matrix const &transform)
729 {
730 Geom::Matrix const t (transform);
731 nr_arena_item_set_transform (item, &t);
732 }
734 void
735 nr_arena_item_set_transform (NRArenaItem *item, Geom::Matrix const *transform)
736 {
737 nr_return_if_fail (item != NULL);
738 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
740 if (!transform && !item->transform)
741 return;
743 const Geom::Matrix *md = (item->transform) ? item->transform : &GEOM_MATRIX_IDENTITY;
744 const Geom::Matrix *ms = (transform) ? transform : &GEOM_MATRIX_IDENTITY;
746 if (!Geom::matrix_equalp(*md, *ms, NR_EPSILON)) {
747 nr_arena_item_request_render (item);
748 if (!transform || transform->isIdentity()) {
749 /* Set to identity affine */
750 item->transform = NULL;
751 } else {
752 if (!item->transform)
753 item->transform = new (GC::ATOMIC) Geom::Matrix ();
754 *item->transform = *transform;
755 }
756 nr_arena_item_request_update (item, NR_ARENA_ITEM_STATE_ALL, TRUE);
757 }
758 }
760 void
761 nr_arena_item_set_opacity (NRArenaItem *item, double opacity)
762 {
763 nr_return_if_fail (item != NULL);
764 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
766 nr_arena_item_request_render (item);
768 item->opacity = (unsigned int) (opacity * 255.9999);
769 }
771 void
772 nr_arena_item_set_sensitive (NRArenaItem *item, unsigned int sensitive)
773 {
774 nr_return_if_fail (item != NULL);
775 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
777 /* fixme: mess with pick/repick... */
779 item->sensitive = sensitive;
780 }
782 void
783 nr_arena_item_set_visible (NRArenaItem *item, unsigned int visible)
784 {
785 nr_return_if_fail (item != NULL);
786 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
788 item->visible = visible;
790 nr_arena_item_request_render (item);
791 }
793 void
794 nr_arena_item_set_clip (NRArenaItem *item, NRArenaItem *clip)
795 {
796 nr_return_if_fail (item != NULL);
797 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
798 nr_return_if_fail (!clip || NR_IS_ARENA_ITEM (clip));
800 if (clip != item->clip) {
801 nr_arena_item_request_render (item);
802 if (item->clip)
803 item->clip = nr_arena_item_detach (item, item->clip);
804 if (clip)
805 item->clip = nr_arena_item_attach (item, clip, NULL, NULL);
806 nr_arena_item_request_update (item, NR_ARENA_ITEM_STATE_ALL, TRUE);
807 }
808 }
810 void
811 nr_arena_item_set_mask (NRArenaItem *item, NRArenaItem *mask)
812 {
813 nr_return_if_fail (item != NULL);
814 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
815 nr_return_if_fail (!mask || NR_IS_ARENA_ITEM (mask));
817 if (mask != item->mask) {
818 nr_arena_item_request_render (item);
819 if (item->mask)
820 item->mask = nr_arena_item_detach (item, item->mask);
821 if (mask)
822 item->mask = nr_arena_item_attach (item, mask, NULL, NULL);
823 nr_arena_item_request_update (item, NR_ARENA_ITEM_STATE_ALL, TRUE);
824 }
825 }
827 void
828 nr_arena_item_set_order (NRArenaItem *item, int order)
829 {
830 nr_return_if_fail (item != NULL);
831 nr_return_if_fail (NR_IS_ARENA_ITEM (item));
833 if (!item->parent)
834 return;
836 NRArenaItem *children = nr_arena_item_children (item->parent);
838 NRArenaItem *ref = NULL;
839 int pos = 0;
840 for (NRArenaItem *child = children; child != NULL; child = child->next) {
841 if (pos >= order)
842 break;
843 if (child != item) {
844 ref = child;
845 pos += 1;
846 }
847 }
849 nr_arena_item_set_child_position (item->parent, item, ref);
850 }
852 void
853 nr_arena_item_set_item_bbox (NRArenaItem *item, Geom::OptRect &bbox)
854 {
855 nr_return_if_fail(item != NULL);
856 nr_return_if_fail(NR_IS_ARENA_ITEM(item));
858 item->item_bbox = bbox;
859 }
861 /** Returns a background image for use with filter effects. */
862 NRPixBlock *
863 nr_arena_item_get_background (NRArenaItem const *item)
864 {
865 if (item->background_new) {
866 return item->background_pb;
867 } else if (item->parent) {
868 return nr_arena_item_get_background (item->parent);
869 } else {
870 return NULL;
871 }
872 }
874 /* Helpers */
876 NRArenaItem *
877 nr_arena_item_attach (NRArenaItem *parent, NRArenaItem *child,
878 NRArenaItem *prev, NRArenaItem *next)
879 {
880 nr_return_val_if_fail (parent != NULL, NULL);
881 nr_return_val_if_fail (NR_IS_ARENA_ITEM (parent), NULL);
882 nr_return_val_if_fail (child != NULL, NULL);
883 nr_return_val_if_fail (NR_IS_ARENA_ITEM (child), NULL);
884 nr_return_val_if_fail (child->parent == NULL, NULL);
885 nr_return_val_if_fail (child->prev == NULL, NULL);
886 nr_return_val_if_fail (child->next == NULL, NULL);
887 nr_return_val_if_fail (!prev || NR_IS_ARENA_ITEM (prev), NULL);
888 nr_return_val_if_fail (!prev || (prev->parent == parent), NULL);
889 nr_return_val_if_fail (!prev || (prev->next == next), NULL);
890 nr_return_val_if_fail (!next || NR_IS_ARENA_ITEM (next), NULL);
891 nr_return_val_if_fail (!next || (next->parent == parent), NULL);
892 nr_return_val_if_fail (!next || (next->prev == prev), NULL);
894 child->parent = parent;
895 child->prev = prev;
896 child->next = next;
898 if (prev)
899 prev->next = child;
900 if (next)
901 next->prev = child;
903 return child;
904 }
906 NRArenaItem *
907 nr_arena_item_detach (NRArenaItem *parent, NRArenaItem *child)
908 {
909 nr_return_val_if_fail (parent != NULL, NULL);
910 nr_return_val_if_fail (NR_IS_ARENA_ITEM (parent), NULL);
911 nr_return_val_if_fail (child != NULL, NULL);
912 nr_return_val_if_fail (NR_IS_ARENA_ITEM (child), NULL);
913 nr_return_val_if_fail (child->parent == parent, NULL);
915 NRArenaItem *prev = child->prev;
916 NRArenaItem *next = child->next;
918 child->parent = NULL;
919 child->prev = NULL;
920 child->next = NULL;
922 if (prev)
923 prev->next = next;
924 if (next)
925 next->prev = prev;
927 return next;
928 }
930 /*
931 Local Variables:
932 mode:c++
933 c-file-style:"stroustrup"
934 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
935 indent-tabs-mode:nil
936 fill-column:99
937 End:
938 */
939 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :