forked from genail/pulpcore
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathGroup.java
More file actions
846 lines (768 loc) · 28.5 KB
/
Group.java
File metadata and controls
846 lines (768 loc) · 28.5 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
/*
Copyright (c) 2009, Interactive Pulp, LLC
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
* Neither the name of Interactive Pulp, LLC nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
*/
package pulpcore.sprite;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Iterator;
import pulpcore.image.BlendMode;
import pulpcore.image.CoreGraphics;
import pulpcore.image.CoreImage;
import pulpcore.math.CoreMath;
import pulpcore.math.Rect;
import pulpcore.math.Tuple2i;
import pulpcore.math.Transform;
import pulpcore.Stage;
import pulpcore.animation.Property;
import pulpcore.image.filter.Filter;
/**
A container of Sprites.
*/
public class Group extends Sprite {
/** Immutable list of sprites. A new array is created when the list changes. */
private Sprite[] sprites = new Sprite[0];
/** The list of sprites at the last call to getRemovedSprites() */
private Sprite[] previousSprites = null;
private boolean hadFilterLastUpdate = false;
/** Used for children to check if this Group's transform has changed since the last update */
private int transformModCount = 0;
private int fNaturalWidth;
private int fNaturalHeight;
private CoreImage backBuffer;
private boolean backBufferCoversStage;
private BlendMode backBufferBlendMode = BlendMode.SrcOver();
private Transform backBufferTransform = new Transform();
public Group() {
this(0, 0, 0, 0);
}
public Group(int x, int y) {
this(x, y, 0, 0);
}
public Group(int x, int y, int width, int height) {
super(x, y, width, height);
fNaturalWidth = CoreMath.toFixed(width);
fNaturalHeight = CoreMath.toFixed(height);
}
public Group(double x, double y) {
this(x, y, 0, 0);
}
public Group(double x, double y, double width, double height) {
super(x, y, width, height);
fNaturalWidth = CoreMath.toFixed(width);
fNaturalHeight = CoreMath.toFixed(height);
}
/* package-private */ int getTransformModCount() {
return transformModCount;
}
/* package-private */ void updateTransformModCount() {
transformModCount++;
}
private Object getTreeLock() {
Object lock = getScene2D();
if (lock == null) {
lock = this;
}
return lock;
}
/**
Returns {@code true} if sprites inside this Group are not visible outside the
natural bounds of this Group.
The default implementation returns {@code true} if the Group has a back buffer.
@see #getNaturalWidth()
@see #getNaturalHeight()
*/
public boolean isOverflowClipped() {
return hasBackBuffer();
}
//
// Sprite list queries
//
/**
Returns an Iterator of the Sprites in this Group (in proper sequence). The iterator
provides a snapshot of the state of the list when the iterator was constructed.
No synchronization is needed while traversing the iterator.
The iterator does NOT support the {@code remove} method.
@return The iterator.
*/
public Iterator iterator() {
return Collections.unmodifiableList(Arrays.asList(sprites)).iterator();
}
/**
Returns the number of sprites in this group. This includes child groups but not
the children of those groups.
*/
public int size() {
return sprites.length;
}
/**
Returns the sprite at the specified position in this group. Returns {@code null } if
the index is out of range ({@code index < 0 || index >= size()}).
*/
public Sprite get(int index) {
Sprite[] snapshot = sprites;
if (index < 0 || index >= snapshot.length) {
return null;
}
return snapshot[index];
}
/**
Returns {@code true} if this Group contains the specified Sprite.
*/
public boolean contains(Sprite sprite) {
return indexOf(sprites, sprite) != -1;
}
/**
Returns {@code true} if this Group is an ancestor of the specified Sprite.
*/
public boolean isAncestorOf(Sprite sprite) {
Group parent = (sprite == null) ? null : sprite.getParent();
while (parent != null) {
if (parent == this) {
return true;
}
else {
parent = parent.getParent();
}
}
return false;
}
/**
Finds the Sprite whose tag is equal to the specified tag (using
{@code tag.equals(sprite.getTag())}. Returns null if the specified tag is null, or
if no Sprite with the specified tag is found.
*/
public Sprite findWithTag(Object tag) {
if (tag == null) {
return null;
}
if (tag.equals(this.getTag())) {
return this;
}
Sprite[] snapshot = sprites;
for (int i = snapshot.length - 1; i >= 0; i--) {
Sprite child = snapshot[i];
if (child instanceof Group) {
child = ((Group)child).findWithTag(tag);
if (child != null) {
return child;
}
}
else if (tag.equals(child.getTag())) {
return child;
}
}
return null;
}
/**
Finds the top-most sprite at the specified location, or null if none is found.
All sprites in this Group and any child Groups are searched until a sprite is found.
This method never returns a Group.
@param viewX x-coordinate in view space.
@param viewY y-coordinate in view space.
@return The top-most sprite at the specified location, or null if none is found.
*/
public Sprite pick(int viewX, int viewY) {
if (isOverflowClipped()) {
double lx = getLocalX(viewX, viewY);
double ly = getLocalY(viewX, viewY);
double lw = CoreMath.toFloat(getNaturalWidth());
double lh = CoreMath.toFloat(getNaturalHeight());
if (lx < 0 || ly < 0 || lx >= lw || ly >= lh) {
return null;
}
}
Sprite[] snapshot = sprites;
for (int i = snapshot.length - 1; i >= 0; i--) {
Sprite child = snapshot[i];
if (child instanceof Group) {
child = ((Group)child).pick(viewX, viewY);
if (child != null) {
return child;
}
}
else if (child.contains(viewX, viewY)) {
return child;
}
}
return null;
}
/**
Finds the top-most sprite that is enabled and visible at the specified location, or null
if none is found.
All sprites in this Group and any child Groups are searched until a sprite is found.
This method never returns a Group.
<p>
This Group or it's ancestors (if any) are not checked if they are enabled or visible.
<p>
This method is useful for finding a sprite to use to set the cursor or take mouse input
from.
@param viewX x-coordinate in view space
@param viewY y-coordinate in view space
@return The top-most sprite that is enabled and visible at the specified location, or null
if none is found.
*/
public Sprite pickEnabledAndVisible(int viewX, int viewY) {
if (isOverflowClipped()) {
double lx = getLocalX(viewX, viewY);
double ly = getLocalY(viewX, viewY);
double lw = CoreMath.toFloat(getNaturalWidth());
double lh = CoreMath.toFloat(getNaturalHeight());
if (lx < 0 || ly < 0 || lx >= lw || ly >= lh) {
return null;
}
}
Sprite[] snapshot = sprites;
for (int i = snapshot.length - 1; i >= 0; i--) {
Sprite child = snapshot[i];
if (child.enabled.get() == true && child.visible.get() == true &&
child.alpha.get() > 0)
{
if (child instanceof Group) {
child = ((Group)child).pickEnabledAndVisible(viewX, viewY);
if (child != null) {
return child;
}
}
else if (child.contains(viewX, viewY)) {
return child;
}
}
}
return null;
}
/**
Returns the number of sprites in this group and all child groups (not counting child
Groups themselves).
*/
public int getNumSprites() {
Sprite[] snapshot = sprites;
int count = 0;
for (int i = 0; i < snapshot.length; i++) {
Sprite s = snapshot[i];
if (s instanceof Group) {
count += ((Group)s).getNumSprites();
}
else {
count++;
}
}
return count;
}
/**
Returns the number of visible sprites in this group and all child groups (not counting child
Groups themselves).
*/
public int getNumVisibleSprites() {
Sprite[] snapshot = sprites;
if (visible.get() == false || alpha.get() == 0) {
return 0;
}
int count = 0;
for (int i = 0; i < snapshot.length; i++) {
Sprite s = snapshot[i];
if (s instanceof Group) {
count += ((Group)s).getNumVisibleSprites();
}
else if (s.visible.get() == true && s.alpha.get() > 0) {
count++;
}
}
return count;
}
//
// Sprite list modifications
// NOTE: if adding another modification method, also add it to Viewport and ScrollPane
//
/**
Adds a Sprite to this Group. The Sprite is added so it appears above all other sprites in
this Group. If this Sprite already belongs to a Group, it is first removed from that
Group before added to this one.
*/
public void add(Sprite sprite) {
if (sprite != null) {
synchronized (getTreeLock()) {
Group parent = sprite.getParent();
if (parent != null) {
parent.remove(sprite);
}
Sprite[] snapshot = sprites;
sprites = add(snapshot, sprite, snapshot.length);
sprite.setParent(this);
}
}
}
/**
Inserts a Sprite to this Group at the specified position. The Sprite at the current
position (if any) and any subsequent Sprites are moved up in the z-order
(adds one to their indices).
<p>
If the index is less than zero, the sprite is inserted at position zero (the bottom in the
z-order).
If the index is greater than or equal to {@link #size()}, the sprite is inserted at
position {@link #size()} (the top in the z-order).
*/
public void add(int index, Sprite sprite) {
if (sprite != null) {
synchronized (getTreeLock()) {
Group parent = sprite.getParent();
if (parent != null) {
parent.remove(sprite);
}
Sprite[] snapshot = sprites;
sprites = add(snapshot, sprite, index);
sprite.setParent(this);
}
}
}
/**
Removes a Sprite from this Group.
*/
public void remove(Sprite sprite) {
if (sprite != null) {
synchronized (getTreeLock()) {
Sprite[] snapshot = sprites;
int index = indexOf(snapshot, sprite);
if (index != -1) {
sprites = remove(snapshot, index);
sprite.setParent(null);
}
}
}
}
/**
Removes all Sprites from this Group.
*/
public void removeAll() {
synchronized (getTreeLock()) {
Sprite[] snapshot = sprites;
for (int i = 0; i < snapshot.length; i++) {
snapshot[i].setParent(null);
}
sprites = new Sprite[0];
}
}
private void move(Sprite sprite, int position, boolean relative) {
synchronized (getTreeLock()) {
Sprite[] snapshot = sprites;
int oldPosition = indexOf(snapshot, sprite);
if (oldPosition != -1) {
if (relative) {
position += oldPosition;
}
if (position < 0) {
position = 0;
}
else if (position > snapshot.length - 1) {
position = snapshot.length - 1;
}
if (oldPosition != position) {
snapshot = remove(snapshot, oldPosition);
sprites = add(snapshot, sprite, position);
sprite.setDirty(true);
}
}
}
}
/**
Moves the specified Sprite to the top of the z-order, so that all the other Sprites
currently in this Group appear underneath it. If the specified Sprite is not in this Group,
or the Sprite is already at the top, this method does nothing.
*/
public void moveToTop(Sprite sprite) {
move(sprite, Integer.MAX_VALUE, false);
}
/**
Moves the specified Sprite to the bottom of the z-order, so that all the other Sprites
currently in this Group appear above it. If the specified Sprite is not in this Group,
or the Sprite is already at the bottom, this method does nothing.
*/
public void moveToBottom(Sprite sprite) {
move(sprite, 0, false);
}
/**
Moves the specified Sprite up in z-order, swapping places with the first Sprite that
appears above it. If the specified Sprite is not in this Group, or the Sprite is already
at the top, this method does nothing.
*/
public void moveUp(Sprite sprite) {
move(sprite, +1, true);
}
/**
Moves the specified Sprite down in z-order, swapping places with the first Sprite that
appears below it. If the specified Sprite is not in this Group, or the Sprite is already
at the bottom, this method does nothing.
*/
public void moveDown(Sprite sprite) {
move(sprite, -1, true);
}
/**
Gets a list of all of the Sprites in this Group that were
removed since the last call to this method.
<p>
This method is used by Scene2D to implement dirty rectangles.
*/
public ArrayList getRemovedSprites() {
ArrayList removedSprites = null;
Filter f = getWorkingFilter();
if (hadFilterLastUpdate && f == null) {
// Special case: filter removed
removedSprites = new ArrayList();
removedSprites.add(this);
}
if (previousSprites == null) {
// First call from Scene2D - no remove notifications needed
previousSprites = sprites;
}
else if (previousSprites != sprites) {
// Modifications occurred - get list of all removed sprites.
// NOTE: we make the list here, rather than in remove(), because if the list was
// creating in remove() and this method was never called (non-Scene2D implementation)
// the removedSprites list would continue to grow, resulting in a memory leak.
for (int i = 0; i < previousSprites.length; i++) {
if (previousSprites[i].getParent() != this) {
if (removedSprites == null) {
removedSprites = new ArrayList();
}
removedSprites.add(previousSprites[i]);
}
}
previousSprites = sprites;
}
hadFilterLastUpdate = (f != null);
return removedSprites;
}
/**
Packs this group so that its bounds (x, y, width, and height) match the area covered by
its children.
If this Group has a back buffer, the back buffer is resized if necessary.
*/
public void pack() {
Sprite[] snapshot = sprites;
if (snapshot.length > 0) {
// Integers
int minX = Integer.MAX_VALUE;
int minY = Integer.MAX_VALUE;
int maxX = Integer.MIN_VALUE;
int maxY = Integer.MIN_VALUE;
Rect bounds = new Rect();
for (int i = 0; i < snapshot.length; i++) {
Sprite sprite = snapshot[i];
if (sprite instanceof Group) {
((Group)sprite).pack();
}
sprite.getRelativeBounds(bounds);
minX = Math.min(minX, bounds.x);
minY = Math.min(minY, bounds.y);
maxX = Math.max(maxX, bounds.x + bounds.width);
maxY = Math.max(maxY, bounds.y + bounds.height);
}
fNaturalWidth = CoreMath.toFixed(maxX - minX);
fNaturalHeight = CoreMath.toFixed(maxY - minY);
if (minX != 0) {
for (int i = 0; i < snapshot.length; i++) {
Sprite sprite = snapshot[i];
sprite.x.setAsFixed(sprite.x.getAsFixed() - CoreMath.toFixed(minX));
}
this.x.setAsFixed(this.x.getAsFixed() + CoreMath.toFixed(minX));
// TODO: should anchorX be changed?
}
if (minY != 0) {
for (int i = 0; i < snapshot.length; i++) {
Sprite sprite = snapshot[i];
sprite.y.setAsFixed(sprite.y.getAsFixed() - CoreMath.toFixed(minY));
}
this.y.setAsFixed(this.y.getAsFixed() + CoreMath.toFixed(minY));
// TODO: should anchorY be changed?
}
}
else {
fNaturalWidth = 0;
fNaturalHeight = 0;
}
width.setAsFixed(fNaturalWidth);
height.setAsFixed(fNaturalHeight);
if (hasBackBuffer()) {
createBackBuffer(backBufferBlendMode);
}
setDirty(true);
}
//
// Back buffers
//
/* package-private */ Transform getBackBufferTransform() {
return (getFilter() != null) ? Sprite.IDENTITY : backBufferTransform;
}
/**
Creates a back buffer for this Group.
<p>
If this Group was created with a dimension (constructors {@link #Group(int,int,int,int) }
or {@link #Group(double,double,double,double) } or has a dimension after calling
{@link #pack() }, then the back buffer has the same dimensions of this Group. Otherwise,
the back buffer has the same dimensions of the Stage.
*/
public void createBackBuffer() {
createBackBuffer(BlendMode.SrcOver());
}
/**
Creates a back buffer for this Group, and sets the blend mode for rendering onto
the back buffer.
<p>
If this Group was created with a dimension (constructors {@link #Group(int,int,int,int) }
or {@link #Group(double,double,double,double) } or has a dimension after calling
{@link #pack() }, then the back buffer has the same dimensions of this Group. Otherwise,
the back buffer has the same dimensions of the Stage.
*/
public void createBackBuffer(BlendMode blendMode) {
setBackBufferBlendMode(blendMode);
Transform t = new Transform();
int w = getNaturalWidth();
int h = getNaturalHeight();
int backBufferWidth;
int backBufferHeight;
if (w == 0 || h == 0) {
backBufferWidth = Stage.getWidth();
backBufferHeight = Stage.getHeight();
backBufferCoversStage = true;
t.translate(x.getAsFixed(), y.getAsFixed());
}
else {
backBufferWidth = CoreMath.toIntCeil(w);
backBufferHeight = CoreMath.toIntCeil(h);
backBufferCoversStage = false;
}
if (backBuffer == null ||
backBuffer.getWidth() != backBufferWidth ||
backBuffer.getHeight() != backBufferHeight)
{
backBuffer = new CoreImage(backBufferWidth, backBufferHeight, false);
backBufferChanged();
}
if (!backBufferTransform.equals(t)) {
backBufferTransform = t;
backBufferChanged();
}
}
private void backBufferChanged() {
setDirty(true);
}
/**
Checks if this Group has a back buffer.
@return true if this Group has a back buffer.
*/
public boolean hasBackBuffer() {
return (backBuffer != null);
}
public CoreImage getBackBuffer() {
return backBuffer;
}
/**
Removes this Group's back buffer.
*/
public void removeBackBuffer() {
if (backBuffer != null) {
backBuffer = null;
backBufferChanged();
}
}
/**
Sets this Group's blend mode for rendering onto its back buffer.
@param backBufferBlendMode the blend mode.
*/
public void setBackBufferBlendMode(BlendMode backBufferBlendMode) {
if (backBufferBlendMode == null) {
backBufferBlendMode = BlendMode.SrcOver();
}
if (this.backBufferBlendMode != backBufferBlendMode) {
this.backBufferBlendMode = backBufferBlendMode;
backBufferChanged();
}
}
/**
Gets this Group's blend mode for rendering onto its back buffer.
@return the blend mode.
*/
public BlendMode getBackBufferBlendMode() {
return backBufferBlendMode;
}
//
// Sprite class implementation
//
protected int getNaturalWidth() {
if (fNaturalWidth > 0) {
return fNaturalWidth;
}
else {
return width.getAsFixed();
}
}
protected int getNaturalHeight() {
if (fNaturalHeight > 0) {
return fNaturalHeight;
}
else {
return height.getAsFixed();
}
}
public void propertyChange(Property p) {
super.propertyChange(p);
if ((p == width || p == height) && hasBackBuffer()) {
setDirty(true);
}
}
public void update(int elapsedTime) {
super.update(elapsedTime);
Filter f = getWorkingFilter();
Sprite[] snapshot = sprites;
for (int i = 0; i < snapshot.length; i++) {
snapshot[i].update(elapsedTime);
if (f != null && snapshot[i].isDirty()) {
setDirty(true);
}
}
}
protected final void drawSprite(CoreGraphics g) {
Sprite[] snapshot = sprites;
if (backBuffer == null) {
Rect oldClip = null;
boolean setClip = isOverflowClipped();
if (setClip) {
Transform t = g.getTransform();
oldClip = g.getClip();
Rect newClip = new Rect();
t.getBounds(width.getAsFixed(), height.getAsFixed(), newClip);
g.clipRect(newClip);
}
for (int i = 0; i < snapshot.length; i++) {
snapshot[i].draw(g);
}
if (setClip) {
g.setClip(oldClip);
}
}
else {
int clipX;
int clipY;
int clipW;
int clipH;
Transform clipTransform;
CoreGraphics g2 = backBuffer.createGraphics();
g2.setBlendMode(backBufferBlendMode);
if (g == null) {
clipX = 0;
clipY = 0;
clipW = backBuffer.getWidth();
clipH = backBuffer.getHeight();
clipTransform = Sprite.IDENTITY;
}
else {
clipX = g.getClipX();
clipY = g.getClipY();
clipW = g.getClipWidth();
clipH = g.getClipHeight();
if (backBufferCoversStage) {
clipTransform = g.getTransform();
}
else {
clipTransform = getDrawTransform();
}
}
if (clipTransform.getType() != Transform.TYPE_IDENTITY) {
Tuple2i p1 = new Tuple2i(CoreMath.toFixed(clipX), CoreMath.toFixed(clipY));
Tuple2i p2 = new Tuple2i(
CoreMath.toFixed(clipX + clipW),
CoreMath.toFixed(clipY + clipH));
boolean success = true;
success &= clipTransform.inverseTransform(p1);
success &= clipTransform.inverseTransform(p2);
if (!success) {
return;
}
if (p2.x < p1.x) {
int t = p1.x;
p1.x = p2.x;
p2.x = t;
}
if (p2.y < p1.y) {
int t = p1.y;
p1.y = p2.y;
p2.y = t;
}
clipX = CoreMath.toIntFloor(p1.x) - 1;
clipY = CoreMath.toIntFloor(p1.y) - 1;
clipW = CoreMath.toIntCeil(p2.x) - clipX + 2;
clipH = CoreMath.toIntCeil(p2.y) - clipY + 2;
}
g2.setClip(clipX, clipY, clipW, clipH);
g2.clear();
for (int i = 0; i < snapshot.length; i++) {
snapshot[i].draw(g2);
}
// g will be null if called from a filtered sprite
if (g != null) {
if (backBufferCoversStage) {
// Note: setting the transform is ok;
// the transform is popped upon returning from drawSprite()
g.setTransform(Stage.getDefaultTransform());
}
g.drawImage(backBuffer);
}
}
}
//
// Static convenience methods for working with immutable Sprite arrays
//
private static int indexOf(Sprite[] snapshot, Sprite s) {
for (int i = 0; i < snapshot.length; i++) {
if (s == snapshot[i]) {
return i;
}
}
return -1;
}
private static Sprite[] remove(Sprite[] snapshot, int index) {
if (index >= 0 && index < snapshot.length) {
Sprite[] newSprites = new Sprite[snapshot.length - 1];
System.arraycopy(snapshot, 0, newSprites, 0, index);
System.arraycopy(snapshot, index + 1, newSprites, index,
newSprites.length - index);
snapshot = newSprites;
}
return snapshot;
}
private static Sprite[] add(Sprite[] snapshot, Sprite sprite, int index) {
if (index < 0) {
index = 0;
}
else if (index > snapshot.length) {
index = snapshot.length;
}
Sprite[] newSprites = new Sprite[snapshot.length + 1];
System.arraycopy(snapshot, 0, newSprites, 0, index);
newSprites[index] = sprite;
System.arraycopy(snapshot, index, newSprites, index + 1, snapshot.length - index);
return newSprites;
}
}