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;
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
|
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 > 0.0d) {
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.phase = phase;
161 this.startPhase = phase;
162 this.startDashOn = dashOn;
163 this.startIdx = sidx;
164 this.starting = true;
165 this.needsMoveTo = false;
166 this.firstSegidx = 0;
167
168 this.recycleDashes = recycleDashes;
169
170 return this; // fluent API
171 }
172
173 /**
174 * Disposes this dasher:
175 * clean up before reusing this instance
176 */
177 void dispose() {
178 if (DO_CLEAN_DIRTY) {
179 // Force zero-fill dirty arrays:
180 Arrays.fill(curCurvepts, 0.0d);
181 }
182 // Return arrays:
183 if (recycleDashes) {
184 dash = dashes_ref.putArray(dash);
185 }
186 firstSegmentsBuffer = firstSegmentsBuffer_ref.putArray(firstSegmentsBuffer);
187 }
188
189 double[] copyDashArray(final float[] dashes) {
190 final int len = dashes.length;
191 final double[] newDashes;
192 if (len <= MarlinConst.INITIAL_ARRAY) {
193 newDashes = dashes_ref.initial;
194 } else {
195 if (DO_STATS) {
196 rdrCtx.stats.stat_array_dasher_dasher.add(len);
197 }
198 newDashes = dashes_ref.getArray(len);
199 }
200 for (int i = 0; i < len; i++) { newDashes[i] = dashes[i]; }
201 return newDashes;
202 }
203
204 @Override
205 public void moveTo(final double x0, final double y0) {
206 if (firstSegidx != 0) {
207 out.moveTo(sx, sy);
208 emitFirstSegments();
209 }
210 needsMoveTo = true;
211 this.idx = startIdx;
212 this.dashOn = this.startDashOn;
213 this.phase = this.startPhase;
214 this.sx = x0;
215 this.sy = y0;
216 this.x0 = x0;
217 this.y0 = y0;
218 this.starting = true;
219 }
220
221 private void emitSeg(double[] buf, int off, int type) {
222 switch (type) {
223 case 8:
224 out.curveTo(buf[off+0], buf[off+1],
225 buf[off+2], buf[off+3],
226 buf[off+4], buf[off+5]);
227 return;
228 case 6:
229 out.quadTo(buf[off+0], buf[off+1],
230 buf[off+2], buf[off+3]);
231 return;
232 case 4:
233 out.lineTo(buf[off], buf[off+1]);
234 return;
235 default:
236 }
237 }
238
239 private void emitFirstSegments() {
240 final double[] fSegBuf = firstSegmentsBuffer;
241
242 for (int i = 0, len = firstSegidx; i < len; ) {
243 int type = (int)fSegBuf[i];
244 emitSeg(fSegBuf, i + 1, type);
245 i += (type - 1);
246 }
247 firstSegidx = 0;
248 }
249 // We don't emit the first dash right away. If we did, caps would be
250 // drawn on it, but we need joins to be drawn if there's a closePath()
251 // So, we store the path elements that make up the first dash in the
252 // buffer below.
253 private double[] firstSegmentsBuffer; // dynamic array
254 private int firstSegidx;
255
256 // precondition: pts must be in relative coordinates (relative to x0,y0)
257 private void goTo(final double[] pts, final int off, final int type,
258 final boolean on)
259 {
260 final int index = off + type;
261 final double x = pts[index - 4];
262 final double y = pts[index - 3];
263
264 if (on) {
265 if (starting) {
266 goTo_starting(pts, off, type);
267 } else {
268 if (needsMoveTo) {
269 needsMoveTo = false;
270 out.moveTo(x0, y0);
271 }
272 emitSeg(pts, off, type);
273 }
274 } else {
275 if (starting) {
276 // low probability test (hotspot)
277 starting = false;
278 }
279 needsMoveTo = true;
280 }
281 this.x0 = x;
282 this.y0 = y;
283 }
284
285 private void goTo_starting(final double[] pts, final int off, final int type) {
286 int len = type - 1; // - 2 + 1
287 int segIdx = firstSegidx;
288 double[] buf = firstSegmentsBuffer;
289
290 if (segIdx + len > buf.length) {
291 if (DO_STATS) {
292 rdrCtx.stats.stat_array_dasher_firstSegmentsBuffer
293 .add(segIdx + len);
294 }
295 firstSegmentsBuffer = buf
296 = firstSegmentsBuffer_ref.widenArray(buf, segIdx,
297 segIdx + len);
298 }
299 buf[segIdx++] = type;
300 len--;
301 // small arraycopy (2, 4 or 6) but with offset:
302 System.arraycopy(pts, off, buf, segIdx, len);
303 firstSegidx = segIdx + len;
304 }
305
306 @Override
307 public void lineTo(final double x1, final double y1) {
308 final double dx = x1 - x0;
309 final double dy = y1 - y0;
310
311 double len = dx*dx + dy*dy;
312 if (len == 0.0d) {
313 return;
314 }
315 len = Math.sqrt(len);
316
317 // The scaling factors needed to get the dx and dy of the
318 // transformed dash segments.
319 final double cx = dx / len;
320 final double cy = dy / len;
321
322 final double[] _curCurvepts = curCurvepts;
323 final double[] _dash = dash;
324 final int _dashLen = this.dashLen;
325
326 int _idx = idx;
327 boolean _dashOn = dashOn;
328 double _phase = phase;
329
330 double leftInThisDashSegment;
331 double d, dashdx, dashdy, p;
332
333 while (true) {
334 d = _dash[_idx];
335 leftInThisDashSegment = d - _phase;
336
337 if (len <= leftInThisDashSegment) {
338 _curCurvepts[0] = x1;
339 _curCurvepts[1] = y1;
340
341 goTo(_curCurvepts, 0, 4, _dashOn);
342
343 // Advance phase within current dash segment
344 _phase += len;
345
346 // TODO: compare double values using epsilon:
347 if (len == leftInThisDashSegment) {
348 _phase = 0.0d;
349 _idx = (_idx + 1) % _dashLen;
350 _dashOn = !_dashOn;
351 }
352
353 // Save local state:
354 idx = _idx;
355 dashOn = _dashOn;
356 phase = _phase;
357 return;
358 }
359
360 dashdx = d * cx;
361 dashdy = d * cy;
362
363 if (_phase == 0.0d) {
364 _curCurvepts[0] = x0 + dashdx;
365 _curCurvepts[1] = y0 + dashdy;
366 } else {
367 p = leftInThisDashSegment / d;
368 _curCurvepts[0] = x0 + p * dashdx;
369 _curCurvepts[1] = y0 + p * dashdy;
370 }
371
372 goTo(_curCurvepts, 0, 4, _dashOn);
373
374 len -= leftInThisDashSegment;
375 // Advance to next dash segment
376 _idx = (_idx + 1) % _dashLen;
377 _dashOn = !_dashOn;
378 _phase = 0.0d;
379 }
380 }
381
382 // shared instance in DDasher
383 private final LengthIterator li = new LengthIterator();
384
385 // preconditions: curCurvepts must be an array of length at least 2 * type,
386 // that contains the curve we want to dash in the first type elements
387 private void somethingTo(int type) {
388 if (pointCurve(curCurvepts, type)) {
389 return;
390 }
391 final LengthIterator _li = li;
392 final double[] _curCurvepts = curCurvepts;
393 final double[] _dash = dash;
394 final int _dashLen = this.dashLen;
395
396 _li.initializeIterationOnCurve(_curCurvepts, type);
397
398 int _idx = idx;
399 boolean _dashOn = dashOn;
400 double _phase = phase;
401
402 // initially the current curve is at curCurvepts[0...type]
403 int curCurveoff = 0;
404 double lastSplitT = 0.0d;
405 double t;
406 double leftInThisDashSegment = _dash[_idx] - _phase;
407
408 while ((t = _li.next(leftInThisDashSegment)) < 1.0d) {
409 if (t != 0.0d) {
410 DHelpers.subdivideAt((t - lastSplitT) / (1.0d - lastSplitT),
411 _curCurvepts, curCurveoff,
412 _curCurvepts, 0,
413 _curCurvepts, type, type);
414 lastSplitT = t;
415 goTo(_curCurvepts, 2, type, _dashOn);
416 curCurveoff = type;
417 }
418 // Advance to next dash segment
419 _idx = (_idx + 1) % _dashLen;
420 _dashOn = !_dashOn;
421 _phase = 0.0d;
422 leftInThisDashSegment = _dash[_idx];
423 }
424
425 goTo(_curCurvepts, curCurveoff + 2, type, _dashOn);
426
427 _phase += _li.lastSegLen();
428 if (_phase >= _dash[_idx]) {
429 _phase = 0.0d;
430 _idx = (_idx + 1) % _dashLen;
431 _dashOn = !_dashOn;
432 }
433 // Save local state:
434 idx = _idx;
435 dashOn = _dashOn;
436 phase = _phase;
437
438 // reset LengthIterator:
439 _li.reset();
440 }
441
442 private static boolean pointCurve(double[] curve, int type) {
443 for (int i = 2; i < type; i++) {
444 if (curve[i] != curve[i-2]) {
445 return false;
446 }
447 }
448 return true;
449 }
450
451 // Objects of this class are used to iterate through curves. They return
452 // t values where the left side of the curve has a specified length.
453 // It does this by subdividing the input curve until a certain error
454 // condition has been met. A recursive subdivision procedure would
455 // return as many as 1<<limit curves, but this is an iterator and we
456 // don't need all the curves all at once, so what we carry out a
457 // lazy inorder traversal of the recursion tree (meaning we only move
458 // through the tree when we need the next subdivided curve). This saves
459 // us a lot of memory because at any one time we only need to store
460 // limit+1 curves - one for each level of the tree + 1.
461 // NOTE: the way we do things here is not enough to traverse a general
462 // tree; however, the trees we are interested in have the property that
463 // every non leaf node has exactly 2 children
464 static final class LengthIterator {
465 private enum Side {LEFT, RIGHT}
466 // Holds the curves at various levels of the recursion. The root
467 // (i.e. the original curve) is at recCurveStack[0] (but then it
468 // gets subdivided, the left half is put at 1, so most of the time
469 // only the right half of the original curve is at 0)
470 private final double[][] recCurveStack; // dirty
471 // sides[i] indicates whether the node at level i+1 in the path from
472 // the root to the current leaf is a left or right child of its parent.
473 private final Side[] sides; // dirty
474 private int curveType;
475 // lastT and nextT delimit the current leaf.
476 private double nextT;
477 private double lenAtNextT;
478 private double lastT;
479 private double lenAtLastT;
480 private double lenAtLastSplit;
481 private double lastSegLen;
482 // the current level in the recursion tree. 0 is the root. limit
483 // is the deepest possible leaf.
484 private int recLevel;
485 private boolean done;
695 lastT = nextT;
696 lenAtLastT = lenAtNextT;
697 nextT += (1 << (REC_LIMIT - recLevel)) * MIN_T_INC;
698 lenAtNextT += len;
699 // invalidate caches
700 flatLeafCoefCache[2] = -1.0d;
701 cachedHaveLowAcceleration = -1;
702 } else {
703 DHelpers.subdivide(recCurveStack[recLevel], 0,
704 recCurveStack[recLevel+1], 0,
705 recCurveStack[recLevel], 0, curveType);
706 sides[recLevel] = Side.LEFT;
707 recLevel++;
708 goLeft();
709 }
710 }
711
712 // this is a bit of a hack. It returns -1 if we're not on a leaf, and
713 // the length of the leaf if we are on a leaf.
714 private double onLeaf() {
715 final double[] curve = recCurveStack[recLevel];
716 final int _curveType = curveType;
717 double polyLen = 0.0d;
718
719 double x0 = curve[0], y0 = curve[1];
720 for (int i = 2; i < _curveType; i += 2) {
721 final double x1 = curve[i], y1 = curve[i+1];
722 final double len = DHelpers.linelen(x0, y0, x1, y1);
723 polyLen += len;
724 curLeafCtrlPolyLengths[i/2 - 1] = len;
725 x0 = x1;
726 y0 = y1;
727 }
728
729 final double lineLen = DHelpers.linelen(curve[0], curve[1],
730 curve[_curveType-2],
731 curve[_curveType-1]);
732 if ((polyLen - lineLen) < ERR || recLevel == REC_LIMIT) {
733 return (polyLen + lineLen) / 2.0d;
734 }
735 return -1.0d;
736 }
737 }
738
739 @Override
740 public void curveTo(final double x1, final double y1,
741 final double x2, final double y2,
742 final double x3, final double y3)
743 {
744 final double[] _curCurvepts = curCurvepts;
745 _curCurvepts[0] = x0; _curCurvepts[1] = y0;
746 _curCurvepts[2] = x1; _curCurvepts[3] = y1;
747 _curCurvepts[4] = x2; _curCurvepts[5] = y2;
748 _curCurvepts[6] = x3; _curCurvepts[7] = y3;
749 somethingTo(8);
750 }
751
752 @Override
753 public void quadTo(final double x1, final double y1,
754 final double x2, final double y2)
755 {
756 final double[] _curCurvepts = curCurvepts;
757 _curCurvepts[0] = x0; _curCurvepts[1] = y0;
758 _curCurvepts[2] = x1; _curCurvepts[3] = y1;
759 _curCurvepts[4] = x2; _curCurvepts[5] = y2;
760 somethingTo(6);
761 }
762
763 @Override
764 public void closePath() {
765 lineTo(sx, sy);
766 if (firstSegidx != 0) {
767 if (!dashOn || needsMoveTo) {
768 out.moveTo(sx, sy);
769 }
770 emitFirstSegments();
771 }
772 moveTo(sx, sy);
773 }
774
775 @Override
776 public void pathDone() {
777 if (firstSegidx != 0) {
778 out.moveTo(sx, sy);
779 emitFirstSegments();
780 }
781 out.pathDone();
782
783 // Dispose this instance:
784 dispose();
785 }
786
787 @Override
788 public long getNativeConsumer() {
789 throw new InternalError("DDasher does not use a native consumer");
790 }
791 }
792
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