13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package sun.java2d.marlin;
27
28 import static java.lang.Math.PI;
29 import static java.lang.Math.cos;
30 import static java.lang.Math.sqrt;
31 import static java.lang.Math.cbrt;
32 import static java.lang.Math.acos;
33
34 final class Helpers implements MarlinConst {
35
36 private Helpers() {
37 throw new Error("This is a non instantiable class");
38 }
39
40 static boolean within(final float x, final float y, final float err) {
41 final float d = y - x;
42 return (d <= err && d >= -err);
43 }
44
45 static boolean within(final double x, final double y, final double err) {
46 final double d = y - x;
47 return (d <= err && d >= -err);
48 }
49
50 static int quadraticRoots(final float a, final float b,
51 final float c, float[] zeroes, final int off)
52 {
159
160 static float evalQuad(final float a, final float b,
161 final float c, final float t)
162 {
163 return t * (t * a + b) + c;
164 }
165
166 // returns the index 1 past the last valid element remaining after filtering
167 static int filterOutNotInAB(float[] nums, final int off, final int len,
168 final float a, final float b)
169 {
170 int ret = off;
171 for (int i = off, end = off + len; i < end; i++) {
172 if (nums[i] >= a && nums[i] < b) {
173 nums[ret++] = nums[i];
174 }
175 }
176 return ret;
177 }
178
179 static float polyLineLength(float[] poly, final int off, final int nCoords) {
180 assert nCoords % 2 == 0 && poly.length >= off + nCoords : "";
181 float acc = 0.0f;
182 for (int i = off + 2; i < off + nCoords; i += 2) {
183 acc += linelen(poly[i], poly[i+1], poly[i-2], poly[i-1]);
184 }
185 return acc;
186 }
187
188 static float linelen(float x1, float y1, float x2, float y2) {
189 final float dx = x2 - x1;
190 final float dy = y2 - y1;
191 return (float) Math.sqrt(dx*dx + dy*dy);
192 }
193
194 static void subdivide(float[] src, int srcoff, float[] left, int leftoff,
195 float[] right, int rightoff, int type)
196 {
197 switch(type) {
198 case 6:
199 Helpers.subdivideQuad(src, srcoff, left, leftoff, right, rightoff);
200 return;
201 case 8:
202 Helpers.subdivideCubic(src, srcoff, left, leftoff, right, rightoff);
203 return;
204 default:
205 throw new InternalError("Unsupported curve type");
206 }
207 }
419 }
420 if (right != null) {
421 right[rightoff + 0] = ctrlx;
422 right[rightoff + 1] = ctrly;
423 right[rightoff + 2] = x2;
424 right[rightoff + 3] = y2;
425 }
426 }
427
428 static void subdivideAt(float t, float[] src, int srcoff,
429 float[] left, int leftoff,
430 float[] right, int rightoff, int size)
431 {
432 switch(size) {
433 case 8:
434 subdivideCubicAt(t, src, srcoff, left, leftoff, right, rightoff);
435 return;
436 case 6:
437 subdivideQuadAt(t, src, srcoff, left, leftoff, right, rightoff);
438 return;
439 }
440 }
441 }
|
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package sun.java2d.marlin;
27
28 import static java.lang.Math.PI;
29 import static java.lang.Math.cos;
30 import static java.lang.Math.sqrt;
31 import static java.lang.Math.cbrt;
32 import static java.lang.Math.acos;
33 import java.util.Arrays;
34 import sun.awt.geom.PathConsumer2D;
35 import static sun.java2d.marlin.MarlinConst.INITIAL_EDGES_COUNT;
36 import sun.java2d.marlin.stats.Histogram;
37 import sun.java2d.marlin.stats.StatLong;
38
39 final class Helpers implements MarlinConst {
40
41 private Helpers() {
42 throw new Error("This is a non instantiable class");
43 }
44
45 static boolean within(final float x, final float y, final float err) {
46 final float d = y - x;
47 return (d <= err && d >= -err);
48 }
49
50 static boolean within(final double x, final double y, final double err) {
51 final double d = y - x;
52 return (d <= err && d >= -err);
53 }
54
55 static int quadraticRoots(final float a, final float b,
56 final float c, float[] zeroes, final int off)
57 {
164
165 static float evalQuad(final float a, final float b,
166 final float c, final float t)
167 {
168 return t * (t * a + b) + c;
169 }
170
171 // returns the index 1 past the last valid element remaining after filtering
172 static int filterOutNotInAB(float[] nums, final int off, final int len,
173 final float a, final float b)
174 {
175 int ret = off;
176 for (int i = off, end = off + len; i < end; i++) {
177 if (nums[i] >= a && nums[i] < b) {
178 nums[ret++] = nums[i];
179 }
180 }
181 return ret;
182 }
183
184 static float linelen(float x1, float y1, float x2, float y2) {
185 final float dx = x2 - x1;
186 final float dy = y2 - y1;
187 return (float) Math.sqrt(dx*dx + dy*dy);
188 }
189
190 static void subdivide(float[] src, int srcoff, float[] left, int leftoff,
191 float[] right, int rightoff, int type)
192 {
193 switch(type) {
194 case 6:
195 Helpers.subdivideQuad(src, srcoff, left, leftoff, right, rightoff);
196 return;
197 case 8:
198 Helpers.subdivideCubic(src, srcoff, left, leftoff, right, rightoff);
199 return;
200 default:
201 throw new InternalError("Unsupported curve type");
202 }
203 }
415 }
416 if (right != null) {
417 right[rightoff + 0] = ctrlx;
418 right[rightoff + 1] = ctrly;
419 right[rightoff + 2] = x2;
420 right[rightoff + 3] = y2;
421 }
422 }
423
424 static void subdivideAt(float t, float[] src, int srcoff,
425 float[] left, int leftoff,
426 float[] right, int rightoff, int size)
427 {
428 switch(size) {
429 case 8:
430 subdivideCubicAt(t, src, srcoff, left, leftoff, right, rightoff);
431 return;
432 case 6:
433 subdivideQuadAt(t, src, srcoff, left, leftoff, right, rightoff);
434 return;
435 }
436 }
437
438 // From sun.java2d.loops.GeneralRenderer:
439
440 static final int OUTCODE_TOP = 1;
441 static final int OUTCODE_BOTTOM = 2;
442 static final int OUTCODE_LEFT = 4;
443 static final int OUTCODE_RIGHT = 8;
444
445 static int outcode(final float x, final float y,
446 final float[] clipRect)
447 {
448 int code;
449 if (y < clipRect[0]) {
450 code = OUTCODE_TOP;
451 } else if (y >= clipRect[1]) {
452 code = OUTCODE_BOTTOM;
453 } else {
454 code = 0;
455 }
456 if (x < clipRect[2]) {
457 code |= OUTCODE_LEFT;
458 } else if (x >= clipRect[3]) {
459 code |= OUTCODE_RIGHT;
460 }
461 return code;
462 }
463
464 // a stack of polynomial curves where each curve shares endpoints with
465 // adjacent ones.
466 static final class PolyStack {
467 private static final byte TYPE_LINETO = (byte) 0;
468 private static final byte TYPE_QUADTO = (byte) 1;
469 private static final byte TYPE_CUBICTO = (byte) 2;
470
471 // curves capacity = edges count (8192) = edges x 2 (coords)
472 private static final int INITIAL_CURVES_COUNT = INITIAL_EDGES_COUNT << 1;
473
474 // types capacity = edges count (4096)
475 private static final int INITIAL_TYPES_COUNT = INITIAL_EDGES_COUNT;
476
477 float[] curves;
478 int end;
479 byte[] curveTypes;
480 int numCurves;
481
482 // curves ref (dirty)
483 final FloatArrayCache.Reference curves_ref;
484 // curveTypes ref (dirty)
485 final ByteArrayCache.Reference curveTypes_ref;
486
487 // used marks (stats only)
488 int curveTypesUseMark;
489 int curvesUseMark;
490
491 private final StatLong stat_polystack_types;
492 private final StatLong stat_polystack_curves;
493 private final Histogram hist_polystack_curves;
494 private final StatLong stat_array_polystack_curves;
495 private final StatLong stat_array_polystack_curveTypes;
496
497 PolyStack(final RendererContext rdrCtx) {
498 this(rdrCtx, null, null, null, null, null);
499 }
500
501 PolyStack(final RendererContext rdrCtx,
502 final StatLong stat_polystack_types,
503 final StatLong stat_polystack_curves,
504 final Histogram hist_polystack_curves,
505 final StatLong stat_array_polystack_curves,
506 final StatLong stat_array_polystack_curveTypes)
507 {
508 curves_ref = rdrCtx.newDirtyFloatArrayRef(INITIAL_CURVES_COUNT); // 32K
509 curves = curves_ref.initial;
510
511 curveTypes_ref = rdrCtx.newDirtyByteArrayRef(INITIAL_TYPES_COUNT); // 4K
512 curveTypes = curveTypes_ref.initial;
513 numCurves = 0;
514 end = 0;
515
516 if (DO_STATS) {
517 curveTypesUseMark = 0;
518 curvesUseMark = 0;
519 }
520 this.stat_polystack_types = stat_polystack_types;
521 this.stat_polystack_curves = stat_polystack_curves;
522 this.hist_polystack_curves = hist_polystack_curves;
523 this.stat_array_polystack_curves = stat_array_polystack_curves;
524 this.stat_array_polystack_curveTypes = stat_array_polystack_curveTypes;
525 }
526
527 /**
528 * Disposes this PolyStack:
529 * clean up before reusing this instance
530 */
531 void dispose() {
532 end = 0;
533 numCurves = 0;
534
535 if (DO_STATS) {
536 stat_polystack_types.add(curveTypesUseMark);
537 stat_polystack_curves.add(curvesUseMark);
538 hist_polystack_curves.add(curvesUseMark);
539
540 // reset marks
541 curveTypesUseMark = 0;
542 curvesUseMark = 0;
543 }
544
545 // Return arrays:
546 // curves and curveTypes are kept dirty
547 curves = curves_ref.putArray(curves);
548 curveTypes = curveTypes_ref.putArray(curveTypes);
549 }
550
551 private void ensureSpace(final int n) {
552 // use substraction to avoid integer overflow:
553 if (curves.length - end < n) {
554 if (DO_STATS) {
555 stat_array_polystack_curves.add(end + n);
556 }
557 curves = curves_ref.widenArray(curves, end, end + n);
558 }
559 if (curveTypes.length <= numCurves) {
560 if (DO_STATS) {
561 stat_array_polystack_curveTypes.add(numCurves + 1);
562 }
563 curveTypes = curveTypes_ref.widenArray(curveTypes,
564 numCurves,
565 numCurves + 1);
566 }
567 }
568
569 void pushCubic(float x0, float y0,
570 float x1, float y1,
571 float x2, float y2)
572 {
573 ensureSpace(6);
574 curveTypes[numCurves++] = TYPE_CUBICTO;
575 // we reverse the coordinate order to make popping easier
576 final float[] _curves = curves;
577 int e = end;
578 _curves[e++] = x2; _curves[e++] = y2;
579 _curves[e++] = x1; _curves[e++] = y1;
580 _curves[e++] = x0; _curves[e++] = y0;
581 end = e;
582 }
583
584 void pushQuad(float x0, float y0,
585 float x1, float y1)
586 {
587 ensureSpace(4);
588 curveTypes[numCurves++] = TYPE_QUADTO;
589 final float[] _curves = curves;
590 int e = end;
591 _curves[e++] = x1; _curves[e++] = y1;
592 _curves[e++] = x0; _curves[e++] = y0;
593 end = e;
594 }
595
596 void pushLine(float x, float y) {
597 ensureSpace(2);
598 curveTypes[numCurves++] = TYPE_LINETO;
599 curves[end++] = x; curves[end++] = y;
600 }
601
602 void pullAll(final PathConsumer2D io) {
603 final int nc = numCurves;
604 if (nc == 0) {
605 return;
606 }
607 if (DO_STATS) {
608 // update used marks:
609 if (numCurves > curveTypesUseMark) {
610 curveTypesUseMark = numCurves;
611 }
612 if (end > curvesUseMark) {
613 curvesUseMark = end;
614 }
615 }
616 final byte[] _curveTypes = curveTypes;
617 final float[] _curves = curves;
618 int e = 0;
619
620 for (int i = 0; i < nc; i++) {
621 switch(_curveTypes[i]) {
622 case TYPE_LINETO:
623 io.lineTo(_curves[e], _curves[e+1]);
624 e += 2;
625 continue;
626 case TYPE_QUADTO:
627 io.quadTo(_curves[e+0], _curves[e+1],
628 _curves[e+2], _curves[e+3]);
629 e += 4;
630 continue;
631 case TYPE_CUBICTO:
632 io.curveTo(_curves[e+0], _curves[e+1],
633 _curves[e+2], _curves[e+3],
634 _curves[e+4], _curves[e+5]);
635 e += 6;
636 continue;
637 default:
638 }
639 }
640 numCurves = 0;
641 end = 0;
642 }
643
644 void popAll(final PathConsumer2D io) {
645 int nc = numCurves;
646 if (nc == 0) {
647 return;
648 }
649 if (DO_STATS) {
650 // update used marks:
651 if (numCurves > curveTypesUseMark) {
652 curveTypesUseMark = numCurves;
653 }
654 if (end > curvesUseMark) {
655 curvesUseMark = end;
656 }
657 }
658 final byte[] _curveTypes = curveTypes;
659 final float[] _curves = curves;
660 int e = end;
661
662 while (nc != 0) {
663 switch(_curveTypes[--nc]) {
664 case TYPE_LINETO:
665 e -= 2;
666 io.lineTo(_curves[e], _curves[e+1]);
667 continue;
668 case TYPE_QUADTO:
669 e -= 4;
670 io.quadTo(_curves[e+0], _curves[e+1],
671 _curves[e+2], _curves[e+3]);
672 continue;
673 case TYPE_CUBICTO:
674 e -= 6;
675 io.curveTo(_curves[e+0], _curves[e+1],
676 _curves[e+2], _curves[e+3],
677 _curves[e+4], _curves[e+5]);
678 continue;
679 default:
680 }
681 }
682 numCurves = 0;
683 end = 0;
684 }
685
686 @Override
687 public String toString() {
688 String ret = "";
689 int nc = numCurves;
690 int last = end;
691 int len;
692 while (nc != 0) {
693 switch(curveTypes[--nc]) {
694 case TYPE_LINETO:
695 len = 2;
696 ret += "line: ";
697 break;
698 case TYPE_QUADTO:
699 len = 4;
700 ret += "quad: ";
701 break;
702 case TYPE_CUBICTO:
703 len = 6;
704 ret += "cubic: ";
705 break;
706 default:
707 len = 0;
708 }
709 last -= len;
710 ret += Arrays.toString(Arrays.copyOfRange(curves, last, last+len))
711 + "\n";
712 }
713 return ret;
714 }
715 }
716 }
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