1 /*
2 * Copyright (c) 2007, 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 java.util.Arrays;
29
30 /**
31 * The <code>DDasher</code> class takes a series of linear commands
32 * (<code>moveTo</code>, <code>lineTo</code>, <code>close</code> and
33 * <code>end</code>) and breaks them into smaller segments according to a
34 * dash pattern array and a starting dash phase.
35 *
36 * <p> Issues: in J2Se, a zero length dash segment as drawn as a very
37 * short dash, whereas Pisces does not draw anything. The PostScript
38 * semantics are unclear.
39 *
40 */
41 final class DDasher implements DPathConsumer2D, MarlinConst {
42
43 static final int REC_LIMIT = 4;
44 static final double ERR = 0.01d;
45 static final double MIN_T_INC = 1.0d / (1 << REC_LIMIT);
46
47 // More than 24 bits of mantissa means we can no longer accurately
48 // measure the number of times cycled through the dash array so we
49 // punt and override the phase to just be 0 past that point.
50 static final double MAX_CYCLES = 16000000.0d;
51
52 private DPathConsumer2D out;
53 private double[] dash;
54 private int dashLen;
55 private double startPhase;
56 private boolean startDashOn;
57 private int startIdx;
58
59 private boolean starting;
60 private boolean needsMoveTo;
61
62 private int idx;
63 private boolean dashOn;
64 private double phase;
65
66 private double sx, sy;
67 private double x0, y0;
68
69 // temporary storage for the current curve
70 private final double[] curCurvepts;
71
72 // per-thread renderer context
73 final DRendererContext rdrCtx;
74
75 // flag to recycle dash array copy
76 boolean recycleDashes;
77
78 // dashes ref (dirty)
79 final DoubleArrayCache.Reference dashes_ref;
80 // firstSegmentsBuffer ref (dirty)
81 final DoubleArrayCache.Reference firstSegmentsBuffer_ref;
82
83 /**
84 * Constructs a <code>DDasher</code>.
85 * @param rdrCtx per-thread renderer context
86 */
87 DDasher(final DRendererContext rdrCtx) {
88 this.rdrCtx = rdrCtx;
89
90 dashes_ref = rdrCtx.newDirtyDoubleArrayRef(INITIAL_ARRAY); // 1K
91
92 firstSegmentsBuffer_ref = rdrCtx.newDirtyDoubleArrayRef(INITIAL_ARRAY); // 1K
93 firstSegmentsBuffer = firstSegmentsBuffer_ref.initial;
94
95 // we need curCurvepts to be able to contain 2 curves because when
96 // dashing curves, we need to subdivide it
97 curCurvepts = new double[8 * 2];
98 }
99
100 /**
101 * Initialize the <code>DDasher</code>.
102 *
103 * @param out an output <code>DPathConsumer2D</code>.
104 * @param dash an array of <code>double</code>s containing the dash pattern
105 * @param dashLen length of the given dash array
106 * @param phase a <code>double</code> containing the dash phase
107 * @param recycleDashes true to indicate to recycle the given dash array
108 * @return this instance
109 */
110 DDasher init(final DPathConsumer2D out, double[] dash, int dashLen,
111 double phase, boolean recycleDashes)
112 {
113 this.out = out;
114
115 // Normalize so 0 <= phase < dash[0]
116 int sidx = 0;
117 dashOn = true;
118 double sum = 0.0d;
119 for (double d : dash) {
120 sum += d;
121 }
122 double cycles = phase / sum;
123 if (phase < 0.0d) {
124 if (-cycles >= MAX_CYCLES) {
125 phase = 0.0d;
126 } else {
127 int fullcycles = FloatMath.floor_int(-cycles);
128 if ((fullcycles & dash.length & 1) != 0) {
129 dashOn = !dashOn;
130 }
131 phase += fullcycles * sum;
132 while (phase < 0.0d) {
133 if (--sidx < 0) {
134 sidx = dash.length - 1;
135 }
136 phase += dash[sidx];
137 dashOn = !dashOn;
138 }
139 }
140 } else if (phase > 0) {
141 if (cycles >= MAX_CYCLES) {
142 phase = 0.0d;
143 } else {
144 int fullcycles = FloatMath.floor_int(cycles);
145 if ((fullcycles & dash.length & 1) != 0) {
146 dashOn = !dashOn;
147 }
148 phase -= fullcycles * sum;
149 double d;
150 while (phase >= (d = dash[sidx])) {
151 phase -= d;
152 sidx = (sidx + 1) % dash.length;
153 dashOn = !dashOn;
154 }
155 }
156 }
157
158 this.dash = dash;
159 this.dashLen = dashLen;
160 this.startPhase = this.phase = phase;
161 this.startDashOn = dashOn;
162 this.startIdx = sidx;
163 this.starting = true;
164 needsMoveTo = false;
165 firstSegidx = 0;
166
167 this.recycleDashes = recycleDashes;
168
169 return this; // fluent API
170 }
171
172 /**
173 * Disposes this dasher:
174 * clean up before reusing this instance
175 */
176 void dispose() {
177 if (DO_CLEAN_DIRTY) {
178 // Force zero-fill dirty arrays:
179 Arrays.fill(curCurvepts, 0.0d);
180 }
181 // Return arrays:
182 if (recycleDashes) {
183 dash = dashes_ref.putArray(dash);
184 }
185 firstSegmentsBuffer = firstSegmentsBuffer_ref.putArray(firstSegmentsBuffer);
186 }
187
188 double[] copyDashArray(final float[] dashes) {
189 final int len = dashes.length;
190 final double[] newDashes;
191 if (len <= MarlinConst.INITIAL_ARRAY) {
192 newDashes = dashes_ref.initial;
193 } else {
194 if (DO_STATS) {
195 rdrCtx.stats.stat_array_dasher_dasher.add(len);
196 }
197 newDashes = dashes_ref.getArray(len);
198 }
199 for (int i = 0; i < len; i++) { newDashes[i] = dashes[i]; }
200 return newDashes;
201 }
202
203 @Override
204 public void moveTo(double x0, double y0) {
205 if (firstSegidx > 0) {
206 out.moveTo(sx, sy);
207 emitFirstSegments();
208 }
209 needsMoveTo = true;
210 this.idx = startIdx;
211 this.dashOn = this.startDashOn;
212 this.phase = this.startPhase;
213 this.sx = this.x0 = x0;
214 this.sy = this.y0 = y0;
215 this.starting = true;
216 }
217
218 private void emitSeg(double[] buf, int off, int type) {
219 switch (type) {
220 case 8:
221 out.curveTo(buf[off+0], buf[off+1],
222 buf[off+2], buf[off+3],
223 buf[off+4], buf[off+5]);
224 return;
225 case 6:
226 out.quadTo(buf[off+0], buf[off+1],
227 buf[off+2], buf[off+3]);
228 return;
229 case 4:
230 out.lineTo(buf[off], buf[off+1]);
231 return;
232 default:
233 }
234 }
235
236 private void emitFirstSegments() {
237 final double[] fSegBuf = firstSegmentsBuffer;
238
239 for (int i = 0; i < firstSegidx; ) {
240 int type = (int)fSegBuf[i];
241 emitSeg(fSegBuf, i + 1, type);
242 i += (type - 1);
243 }
244 firstSegidx = 0;
245 }
246 // We don't emit the first dash right away. If we did, caps would be
247 // drawn on it, but we need joins to be drawn if there's a closePath()
248 // So, we store the path elements that make up the first dash in the
249 // buffer below.
250 private double[] firstSegmentsBuffer; // dynamic array
251 private int firstSegidx;
252
253 // precondition: pts must be in relative coordinates (relative to x0,y0)
254 private void goTo(double[] pts, int off, final int type) {
255 double x = pts[off + type - 4];
256 double y = pts[off + type - 3];
257 if (dashOn) {
258 if (starting) {
259 int len = type - 1; // - 2 + 1
260 int segIdx = firstSegidx;
261 double[] buf = firstSegmentsBuffer;
262 if (segIdx + len > buf.length) {
263 if (DO_STATS) {
264 rdrCtx.stats.stat_array_dasher_firstSegmentsBuffer
265 .add(segIdx + len);
266 }
267 firstSegmentsBuffer = buf
268 = firstSegmentsBuffer_ref.widenArray(buf, segIdx,
269 segIdx + len);
270 }
271 buf[segIdx++] = type;
272 len--;
273 // small arraycopy (2, 4 or 6) but with offset:
274 System.arraycopy(pts, off, buf, segIdx, len);
275 segIdx += len;
276 firstSegidx = segIdx;
277 } else {
278 if (needsMoveTo) {
279 out.moveTo(x0, y0);
280 needsMoveTo = false;
281 }
282 emitSeg(pts, off, type);
283 }
284 } else {
285 starting = false;
286 needsMoveTo = true;
287 }
288 this.x0 = x;
289 this.y0 = y;
290 }
291
292 @Override
293 public void lineTo(double x1, double y1) {
294 double dx = x1 - x0;
295 double dy = y1 - y0;
296
297 double len = dx*dx + dy*dy;
298 if (len == 0.0d) {
299 return;
300 }
301 len = Math.sqrt(len);
302
303 // The scaling factors needed to get the dx and dy of the
304 // transformed dash segments.
305 final double cx = dx / len;
306 final double cy = dy / len;
307
308 final double[] _curCurvepts = curCurvepts;
309 final double[] _dash = dash;
310
311 double leftInThisDashSegment;
312 double dashdx, dashdy, p;
313
314 while (true) {
315 leftInThisDashSegment = _dash[idx] - phase;
316
317 if (len <= leftInThisDashSegment) {
318 _curCurvepts[0] = x1;
319 _curCurvepts[1] = y1;
320 goTo(_curCurvepts, 0, 4);
321
322 // Advance phase within current dash segment
323 phase += len;
324 // TODO: compare double values using epsilon:
325 if (len == leftInThisDashSegment) {
326 phase = 0.0d;
327 idx = (idx + 1) % dashLen;
328 dashOn = !dashOn;
329 }
330 return;
331 }
332
333 dashdx = _dash[idx] * cx;
334 dashdy = _dash[idx] * cy;
335
336 if (phase == 0.0d) {
337 _curCurvepts[0] = x0 + dashdx;
338 _curCurvepts[1] = y0 + dashdy;
339 } else {
340 p = leftInThisDashSegment / _dash[idx];
341 _curCurvepts[0] = x0 + p * dashdx;
342 _curCurvepts[1] = y0 + p * dashdy;
343 }
344
345 goTo(_curCurvepts, 0, 4);
346
347 len -= leftInThisDashSegment;
348 // Advance to next dash segment
349 idx = (idx + 1) % dashLen;
350 dashOn = !dashOn;
351 phase = 0.0d;
352 }
353 }
354
355 // shared instance in DDasher
356 private final LengthIterator li = new LengthIterator();
357
358 // preconditions: curCurvepts must be an array of length at least 2 * type,
359 // that contains the curve we want to dash in the first type elements
360 private void somethingTo(int type) {
361 if (pointCurve(curCurvepts, type)) {
362 return;
363 }
364 li.initializeIterationOnCurve(curCurvepts, type);
365
366 // initially the current curve is at curCurvepts[0...type]
367 int curCurveoff = 0;
368 double lastSplitT = 0.0d;
369 double t;
370 double leftInThisDashSegment = dash[idx] - phase;
371
372 while ((t = li.next(leftInThisDashSegment)) < 1.0d) {
373 if (t != 0.0d) {
374 DHelpers.subdivideAt((t - lastSplitT) / (1.0d - lastSplitT),
375 curCurvepts, curCurveoff,
376 curCurvepts, 0,
377 curCurvepts, type, type);
378 lastSplitT = t;
379 goTo(curCurvepts, 2, type);
380 curCurveoff = type;
381 }
382 // Advance to next dash segment
383 idx = (idx + 1) % dashLen;
384 dashOn = !dashOn;
385 phase = 0.0d;
386 leftInThisDashSegment = dash[idx];
387 }
388 goTo(curCurvepts, curCurveoff+2, type);
389 phase += li.lastSegLen();
390 if (phase >= dash[idx]) {
391 phase = 0.0d;
392 idx = (idx + 1) % dashLen;
393 dashOn = !dashOn;
394 }
395 // reset LengthIterator:
396 li.reset();
397 }
398
399 private static boolean pointCurve(double[] curve, int type) {
400 for (int i = 2; i < type; i++) {
401 if (curve[i] != curve[i-2]) {
402 return false;
403 }
404 }
405 return true;
406 }
407
408 // Objects of this class are used to iterate through curves. They return
409 // t values where the left side of the curve has a specified length.
410 // It does this by subdividing the input curve until a certain error
411 // condition has been met. A recursive subdivision procedure would
412 // return as many as 1<<limit curves, but this is an iterator and we
413 // don't need all the curves all at once, so what we carry out a
414 // lazy inorder traversal of the recursion tree (meaning we only move
415 // through the tree when we need the next subdivided curve). This saves
416 // us a lot of memory because at any one time we only need to store
417 // limit+1 curves - one for each level of the tree + 1.
418 // NOTE: the way we do things here is not enough to traverse a general
419 // tree; however, the trees we are interested in have the property that
420 // every non leaf node has exactly 2 children
421 static final class LengthIterator {
422 private enum Side {LEFT, RIGHT};
423 // Holds the curves at various levels of the recursion. The root
424 // (i.e. the original curve) is at recCurveStack[0] (but then it
425 // gets subdivided, the left half is put at 1, so most of the time
426 // only the right half of the original curve is at 0)
427 private final double[][] recCurveStack; // dirty
428 // sides[i] indicates whether the node at level i+1 in the path from
429 // the root to the current leaf is a left or right child of its parent.
430 private final Side[] sides; // dirty
431 private int curveType;
432 // lastT and nextT delimit the current leaf.
433 private double nextT;
434 private double lenAtNextT;
435 private double lastT;
436 private double lenAtLastT;
437 private double lenAtLastSplit;
438 private double lastSegLen;
439 // the current level in the recursion tree. 0 is the root. limit
440 // is the deepest possible leaf.
441 private int recLevel;
442 private boolean done;
443
444 // the lengths of the lines of the control polygon. Only its first
445 // curveType/2 - 1 elements are valid. This is an optimization. See
446 // next() for more detail.
447 private final double[] curLeafCtrlPolyLengths = new double[3];
448
449 LengthIterator() {
450 this.recCurveStack = new double[REC_LIMIT + 1][8];
451 this.sides = new Side[REC_LIMIT];
452 // if any methods are called without first initializing this object
453 // on a curve, we want it to fail ASAP.
454 this.nextT = Double.MAX_VALUE;
455 this.lenAtNextT = Double.MAX_VALUE;
456 this.lenAtLastSplit = Double.MIN_VALUE;
457 this.recLevel = Integer.MIN_VALUE;
458 this.lastSegLen = Double.MAX_VALUE;
459 this.done = true;
460 }
461
462 /**
463 * Reset this LengthIterator.
464 */
465 void reset() {
466 // keep data dirty
467 // as it appears not useful to reset data:
468 if (DO_CLEAN_DIRTY) {
469 final int recLimit = recCurveStack.length - 1;
470 for (int i = recLimit; i >= 0; i--) {
471 Arrays.fill(recCurveStack[i], 0.0d);
472 }
473 Arrays.fill(sides, Side.LEFT);
474 Arrays.fill(curLeafCtrlPolyLengths, 0.0d);
475 Arrays.fill(nextRoots, 0.0d);
476 Arrays.fill(flatLeafCoefCache, 0.0d);
477 flatLeafCoefCache[2] = -1.0d;
478 }
479 }
480
481 void initializeIterationOnCurve(double[] pts, int type) {
482 // optimize arraycopy (8 values faster than 6 = type):
483 System.arraycopy(pts, 0, recCurveStack[0], 0, 8);
484 this.curveType = type;
485 this.recLevel = 0;
486 this.lastT = 0.0d;
487 this.lenAtLastT = 0.0d;
488 this.nextT = 0.0d;
489 this.lenAtNextT = 0.0d;
490 goLeft(); // initializes nextT and lenAtNextT properly
491 this.lenAtLastSplit = 0.0d;
492 if (recLevel > 0) {
493 this.sides[0] = Side.LEFT;
494 this.done = false;
495 } else {
496 // the root of the tree is a leaf so we're done.
497 this.sides[0] = Side.RIGHT;
498 this.done = true;
499 }
500 this.lastSegLen = 0.0d;
501 }
502
503 // 0 == false, 1 == true, -1 == invalid cached value.
504 private int cachedHaveLowAcceleration = -1;
505
506 private boolean haveLowAcceleration(double err) {
507 if (cachedHaveLowAcceleration == -1) {
508 final double len1 = curLeafCtrlPolyLengths[0];
509 final double len2 = curLeafCtrlPolyLengths[1];
510 // the test below is equivalent to !within(len1/len2, 1, err).
511 // It is using a multiplication instead of a division, so it
512 // should be a bit faster.
513 if (!DHelpers.within(len1, len2, err * len2)) {
514 cachedHaveLowAcceleration = 0;
515 return false;
516 }
517 if (curveType == 8) {
518 final double len3 = curLeafCtrlPolyLengths[2];
519 // if len1 is close to 2 and 2 is close to 3, that probably
520 // means 1 is close to 3 so the second part of this test might
521 // not be needed, but it doesn't hurt to include it.
522 final double errLen3 = err * len3;
523 if (!(DHelpers.within(len2, len3, errLen3) &&
524 DHelpers.within(len1, len3, errLen3))) {
525 cachedHaveLowAcceleration = 0;
526 return false;
527 }
528 }
529 cachedHaveLowAcceleration = 1;
530 return true;
531 }
532
533 return (cachedHaveLowAcceleration == 1);
534 }
535
536 // we want to avoid allocations/gc so we keep this array so we
537 // can put roots in it,
538 private final double[] nextRoots = new double[4];
539
540 // caches the coefficients of the current leaf in its flattened
541 // form (see inside next() for what that means). The cache is
542 // invalid when it's third element is negative, since in any
543 // valid flattened curve, this would be >= 0.
544 private final double[] flatLeafCoefCache = new double[]{0.0d, 0.0d, -1.0d, 0.0d};
545
546 // returns the t value where the remaining curve should be split in
547 // order for the left subdivided curve to have length len. If len
548 // is >= than the length of the uniterated curve, it returns 1.
549 double next(final double len) {
550 final double targetLength = lenAtLastSplit + len;
551 while (lenAtNextT < targetLength) {
552 if (done) {
553 lastSegLen = lenAtNextT - lenAtLastSplit;
554 return 1.0d;
555 }
556 goToNextLeaf();
557 }
558 lenAtLastSplit = targetLength;
559 final double leaflen = lenAtNextT - lenAtLastT;
560 double t = (targetLength - lenAtLastT) / leaflen;
561
562 // cubicRootsInAB is a fairly expensive call, so we just don't do it
563 // if the acceleration in this section of the curve is small enough.
564 if (!haveLowAcceleration(0.05d)) {
565 // We flatten the current leaf along the x axis, so that we're
566 // left with a, b, c which define a 1D Bezier curve. We then
567 // solve this to get the parameter of the original leaf that
568 // gives us the desired length.
569 final double[] _flatLeafCoefCache = flatLeafCoefCache;
570
571 if (_flatLeafCoefCache[2] < 0.0d) {
572 double x = curLeafCtrlPolyLengths[0],
573 y = x + curLeafCtrlPolyLengths[1];
574 if (curveType == 8) {
575 double z = y + curLeafCtrlPolyLengths[2];
576 _flatLeafCoefCache[0] = 3.0d * (x - y) + z;
577 _flatLeafCoefCache[1] = 3.0d * (y - 2.0d * x);
578 _flatLeafCoefCache[2] = 3.0d * x;
579 _flatLeafCoefCache[3] = -z;
580 } else if (curveType == 6) {
581 _flatLeafCoefCache[0] = 0.0d;
582 _flatLeafCoefCache[1] = y - 2.0d * x;
583 _flatLeafCoefCache[2] = 2.0d * x;
584 _flatLeafCoefCache[3] = -y;
585 }
586 }
587 double a = _flatLeafCoefCache[0];
588 double b = _flatLeafCoefCache[1];
589 double c = _flatLeafCoefCache[2];
590 double d = t * _flatLeafCoefCache[3];
591
592 // we use cubicRootsInAB here, because we want only roots in 0, 1,
593 // and our quadratic root finder doesn't filter, so it's just a
594 // matter of convenience.
595 int n = DHelpers.cubicRootsInAB(a, b, c, d, nextRoots, 0, 0.0d, 1.0d);
596 if (n == 1 && !Double.isNaN(nextRoots[0])) {
597 t = nextRoots[0];
598 }
599 }
600 // t is relative to the current leaf, so we must make it a valid parameter
601 // of the original curve.
602 t = t * (nextT - lastT) + lastT;
603 if (t >= 1.0d) {
604 t = 1.0d;
605 done = true;
606 }
607 // even if done = true, if we're here, that means targetLength
608 // is equal to, or very, very close to the total length of the
609 // curve, so lastSegLen won't be too high. In cases where len
610 // overshoots the curve, this method will exit in the while
611 // loop, and lastSegLen will still be set to the right value.
612 lastSegLen = len;
613 return t;
614 }
615
616 double lastSegLen() {
617 return lastSegLen;
618 }
619
620 // go to the next leaf (in an inorder traversal) in the recursion tree
621 // preconditions: must be on a leaf, and that leaf must not be the root.
622 private void goToNextLeaf() {
623 // We must go to the first ancestor node that has an unvisited
624 // right child.
625 int _recLevel = recLevel;
626 final Side[] _sides = sides;
627
628 _recLevel--;
629 while(_sides[_recLevel] == Side.RIGHT) {
630 if (_recLevel == 0) {
631 recLevel = 0;
632 done = true;
633 return;
634 }
635 _recLevel--;
636 }
637
638 _sides[_recLevel] = Side.RIGHT;
639 // optimize arraycopy (8 values faster than 6 = type):
640 System.arraycopy(recCurveStack[_recLevel], 0,
641 recCurveStack[_recLevel+1], 0, 8);
642 _recLevel++;
643
644 recLevel = _recLevel;
645 goLeft();
646 }
647
648 // go to the leftmost node from the current node. Return its length.
649 private void goLeft() {
650 double len = onLeaf();
651 if (len >= 0.0d) {
652 lastT = nextT;
653 lenAtLastT = lenAtNextT;
654 nextT += (1 << (REC_LIMIT - recLevel)) * MIN_T_INC;
655 lenAtNextT += len;
656 // invalidate caches
657 flatLeafCoefCache[2] = -1.0d;
658 cachedHaveLowAcceleration = -1;
659 } else {
660 DHelpers.subdivide(recCurveStack[recLevel], 0,
661 recCurveStack[recLevel+1], 0,
662 recCurveStack[recLevel], 0, curveType);
663 sides[recLevel] = Side.LEFT;
664 recLevel++;
665 goLeft();
666 }
667 }
668
669 // this is a bit of a hack. It returns -1 if we're not on a leaf, and
670 // the length of the leaf if we are on a leaf.
671 private double onLeaf() {
672 double[] curve = recCurveStack[recLevel];
673 double polyLen = 0.0d;
674
675 double x0 = curve[0], y0 = curve[1];
676 for (int i = 2; i < curveType; i += 2) {
677 final double x1 = curve[i], y1 = curve[i+1];
678 final double len = DHelpers.linelen(x0, y0, x1, y1);
679 polyLen += len;
680 curLeafCtrlPolyLengths[i/2 - 1] = len;
681 x0 = x1;
682 y0 = y1;
683 }
684
685 final double lineLen = DHelpers.linelen(curve[0], curve[1],
686 curve[curveType-2],
687 curve[curveType-1]);
688 if ((polyLen - lineLen) < ERR || recLevel == REC_LIMIT) {
689 return (polyLen + lineLen) / 2.0d;
690 }
691 return -1.0d;
692 }
693 }
694
695 @Override
696 public void curveTo(double x1, double y1,
697 double x2, double y2,
698 double x3, double y3)
699 {
700 final double[] _curCurvepts = curCurvepts;
701 _curCurvepts[0] = x0; _curCurvepts[1] = y0;
702 _curCurvepts[2] = x1; _curCurvepts[3] = y1;
703 _curCurvepts[4] = x2; _curCurvepts[5] = y2;
704 _curCurvepts[6] = x3; _curCurvepts[7] = y3;
705 somethingTo(8);
706 }
707
708 @Override
709 public void quadTo(double x1, double y1, double x2, double y2) {
710 final double[] _curCurvepts = curCurvepts;
711 _curCurvepts[0] = x0; _curCurvepts[1] = y0;
712 _curCurvepts[2] = x1; _curCurvepts[3] = y1;
713 _curCurvepts[4] = x2; _curCurvepts[5] = y2;
714 somethingTo(6);
715 }
716
717 @Override
718 public void closePath() {
719 lineTo(sx, sy);
720 if (firstSegidx > 0) {
721 if (!dashOn || needsMoveTo) {
722 out.moveTo(sx, sy);
723 }
724 emitFirstSegments();
725 }
726 moveTo(sx, sy);
727 }
728
729 @Override
730 public void pathDone() {
731 if (firstSegidx > 0) {
732 out.moveTo(sx, sy);
733 emitFirstSegments();
734 }
735 out.pathDone();
736
737 // Dispose this instance:
738 dispose();
739 }
740
741 @Override
742 public long getNativeConsumer() {
743 throw new InternalError("DDasher does not use a native consumer");
744 }
745 }
746