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.awt.BasicStroke;
29 import java.awt.Shape;
30 import java.awt.geom.AffineTransform;
31 import java.awt.geom.Path2D;
32 import java.awt.geom.PathIterator;
33 import java.security.AccessController;
34 import static sun.java2d.marlin.MarlinUtils.logInfo;
35 import sun.awt.geom.PathConsumer2D;
36 import sun.java2d.ReentrantContextProvider;
37 import sun.java2d.ReentrantContextProviderCLQ;
38 import sun.java2d.ReentrantContextProviderTL;
39 import sun.java2d.pipe.AATileGenerator;
40 import sun.java2d.pipe.Region;
41 import sun.java2d.pipe.RenderingEngine;
42 import sun.security.action.GetPropertyAction;
43
44 /**
45 * Marlin RendererEngine implementation (derived from Pisces)
46 */
47 public final class MarlinRenderingEngine extends RenderingEngine
48 implements MarlinConst
49 {
50 private static enum NormMode {
51 ON_WITH_AA {
52 @Override
53 PathIterator getNormalizingPathIterator(final RendererContext rdrCtx,
54 final PathIterator src)
55 {
56 // NormalizingPathIterator NearestPixelCenter:
57 return rdrCtx.nPCPathIterator.init(src);
58 }
59 },
60 ON_NO_AA{
61 @Override
62 PathIterator getNormalizingPathIterator(final RendererContext rdrCtx,
63 final PathIterator src)
64 {
65 // NearestPixel NormalizingPathIterator:
66 return rdrCtx.nPQPathIterator.init(src);
67 }
68 },
69 OFF{
70 @Override
71 PathIterator getNormalizingPathIterator(final RendererContext rdrCtx,
72 final PathIterator src)
73 {
74 // return original path iterator if normalization is disabled:
75 return src;
76 }
77 };
78
79 abstract PathIterator getNormalizingPathIterator(RendererContext rdrCtx,
80 PathIterator src);
81 }
82
83 private static final float MIN_PEN_SIZE = 1.0f / NORM_SUBPIXELS;
84
85 static final float UPPER_BND = Float.MAX_VALUE / 2.0f;
86 static final float LOWER_BND = -UPPER_BND;
87
88 /**
89 * Public constructor
90 */
91 public MarlinRenderingEngine() {
92 super();
93 logSettings(MarlinRenderingEngine.class.getName());
94 }
95
96 /**
97 * Create a widened path as specified by the parameters.
98 * <p>
99 * The specified {@code src} {@link Shape} is widened according
100 * to the specified attribute parameters as per the
101 * {@link BasicStroke} specification.
102 *
103 * @param src the source path to be widened
104 * @param width the width of the widened path as per {@code BasicStroke}
105 * @param caps the end cap decorations as per {@code BasicStroke}
106 * @param join the segment join decorations as per {@code BasicStroke}
107 * @param miterlimit the miter limit as per {@code BasicStroke}
108 * @param dashes the dash length array as per {@code BasicStroke}
109 * @param dashphase the initial dash phase as per {@code BasicStroke}
110 * @return the widened path stored in a new {@code Shape} object
111 * @since 1.7
112 */
113 @Override
114 public Shape createStrokedShape(Shape src,
115 float width,
116 int caps,
117 int join,
118 float miterlimit,
119 float[] dashes,
120 float dashphase)
121 {
122 final RendererContext rdrCtx = getRendererContext();
123 try {
124 // initialize a large copyable Path2D to avoid a lot of array growing:
125 final Path2D.Float p2d = rdrCtx.getPath2D();
126
127 strokeTo(rdrCtx,
128 src,
129 null,
130 width,
131 NormMode.OFF,
132 caps,
133 join,
134 miterlimit,
135 dashes,
136 dashphase,
137 rdrCtx.transformerPC2D.wrapPath2d(p2d)
138 );
139
140 // Use Path2D copy constructor (trim)
141 return new Path2D.Float(p2d);
142
143 } finally {
144 // recycle the RendererContext instance
145 returnRendererContext(rdrCtx);
146 }
147 }
148
149 /**
150 * Sends the geometry for a widened path as specified by the parameters
151 * to the specified consumer.
152 * <p>
153 * The specified {@code src} {@link Shape} is widened according
154 * to the parameters specified by the {@link BasicStroke} object.
155 * Adjustments are made to the path as appropriate for the
156 * {@link java.awt.RenderingHints#VALUE_STROKE_NORMALIZE} hint if the
157 * {@code normalize} boolean parameter is true.
158 * Adjustments are made to the path as appropriate for the
159 * {@link java.awt.RenderingHints#VALUE_ANTIALIAS_ON} hint if the
160 * {@code antialias} boolean parameter is true.
161 * <p>
162 * The geometry of the widened path is forwarded to the indicated
163 * {@link PathConsumer2D} object as it is calculated.
164 *
165 * @param src the source path to be widened
166 * @param bs the {@code BasicSroke} object specifying the
167 * decorations to be applied to the widened path
168 * @param normalize indicates whether stroke normalization should
169 * be applied
170 * @param antialias indicates whether or not adjustments appropriate
171 * to antialiased rendering should be applied
172 * @param consumer the {@code PathConsumer2D} instance to forward
173 * the widened geometry to
174 * @since 1.7
175 */
176 @Override
177 public void strokeTo(Shape src,
178 AffineTransform at,
179 BasicStroke bs,
180 boolean thin,
181 boolean normalize,
182 boolean antialias,
183 final PathConsumer2D consumer)
184 {
185 final NormMode norm = (normalize) ?
186 ((antialias) ? NormMode.ON_WITH_AA : NormMode.ON_NO_AA)
187 : NormMode.OFF;
188
189 final RendererContext rdrCtx = getRendererContext();
190 try {
191 strokeTo(rdrCtx, src, at, bs, thin, norm, antialias, consumer);
192 } finally {
193 // recycle the RendererContext instance
194 returnRendererContext(rdrCtx);
195 }
196 }
197
198 final void strokeTo(final RendererContext rdrCtx,
199 Shape src,
200 AffineTransform at,
201 BasicStroke bs,
202 boolean thin,
203 NormMode normalize,
204 boolean antialias,
205 PathConsumer2D pc2d)
206 {
207 float lw;
208 if (thin) {
209 if (antialias) {
210 lw = userSpaceLineWidth(at, MIN_PEN_SIZE);
211 } else {
212 lw = userSpaceLineWidth(at, 1.0f);
213 }
214 } else {
215 lw = bs.getLineWidth();
216 }
217 strokeTo(rdrCtx,
218 src,
219 at,
220 lw,
221 normalize,
222 bs.getEndCap(),
223 bs.getLineJoin(),
224 bs.getMiterLimit(),
225 bs.getDashArray(),
226 bs.getDashPhase(),
227 pc2d);
228 }
229
230 private final float userSpaceLineWidth(AffineTransform at, float lw) {
231
232 float widthScale;
233
234 if (at == null) {
235 widthScale = 1.0f;
236 } else if ((at.getType() & (AffineTransform.TYPE_GENERAL_TRANSFORM |
237 AffineTransform.TYPE_GENERAL_SCALE)) != 0) {
238 widthScale = (float)Math.sqrt(at.getDeterminant());
239 } else {
240 // First calculate the "maximum scale" of this transform.
241 double A = at.getScaleX(); // m00
242 double C = at.getShearX(); // m01
243 double B = at.getShearY(); // m10
244 double D = at.getScaleY(); // m11
245
246 /*
247 * Given a 2 x 2 affine matrix [ A B ] such that
248 * [ C D ]
249 * v' = [x' y'] = [Ax + Cy, Bx + Dy], we want to
250 * find the maximum magnitude (norm) of the vector v'
251 * with the constraint (x^2 + y^2 = 1).
252 * The equation to maximize is
253 * |v'| = sqrt((Ax+Cy)^2+(Bx+Dy)^2)
254 * or |v'| = sqrt((AA+BB)x^2 + 2(AC+BD)xy + (CC+DD)y^2).
255 * Since sqrt is monotonic we can maximize |v'|^2
256 * instead and plug in the substitution y = sqrt(1 - x^2).
257 * Trigonometric equalities can then be used to get
258 * rid of most of the sqrt terms.
259 */
260
261 double EA = A*A + B*B; // x^2 coefficient
262 double EB = 2.0d * (A*C + B*D); // xy coefficient
263 double EC = C*C + D*D; // y^2 coefficient
264
265 /*
266 * There is a lot of calculus omitted here.
267 *
268 * Conceptually, in the interests of understanding the
269 * terms that the calculus produced we can consider
270 * that EA and EC end up providing the lengths along
271 * the major axes and the hypot term ends up being an
272 * adjustment for the additional length along the off-axis
273 * angle of rotated or sheared ellipses as well as an
274 * adjustment for the fact that the equation below
275 * averages the two major axis lengths. (Notice that
276 * the hypot term contains a part which resolves to the
277 * difference of these two axis lengths in the absence
278 * of rotation.)
279 *
280 * In the calculus, the ratio of the EB and (EA-EC) terms
281 * ends up being the tangent of 2*theta where theta is
282 * the angle that the long axis of the ellipse makes
283 * with the horizontal axis. Thus, this equation is
284 * calculating the length of the hypotenuse of a triangle
285 * along that axis.
286 */
287
288 double hypot = Math.sqrt(EB*EB + (EA-EC)*(EA-EC));
289 // sqrt omitted, compare to squared limits below.
290 double widthsquared = ((EA + EC + hypot) / 2.0d);
291
292 widthScale = (float)Math.sqrt(widthsquared);
293 }
294
295 return (lw / widthScale);
296 }
297
298 final void strokeTo(final RendererContext rdrCtx,
299 Shape src,
300 AffineTransform at,
301 float width,
302 NormMode norm,
303 int caps,
304 int join,
305 float miterlimit,
306 float[] dashes,
307 float dashphase,
308 PathConsumer2D pc2d)
309 {
310 // We use strokerat so that in Stroker and Dasher we can work only
311 // with the pre-transformation coordinates. This will repeat a lot of
312 // computations done in the path iterator, but the alternative is to
313 // work with transformed paths and compute untransformed coordinates
314 // as needed. This would be faster but I do not think the complexity
315 // of working with both untransformed and transformed coordinates in
316 // the same code is worth it.
317 // However, if a path's width is constant after a transformation,
318 // we can skip all this untransforming.
319
320 // As pathTo() will check transformed coordinates for invalid values
321 // (NaN / Infinity) to ignore such points, it is necessary to apply the
322 // transformation before the path processing.
323 AffineTransform strokerat = null;
324
325 int dashLen = -1;
326 boolean recycleDashes = false;
327
328 if (at != null && !at.isIdentity()) {
329 final double a = at.getScaleX();
330 final double b = at.getShearX();
331 final double c = at.getShearY();
332 final double d = at.getScaleY();
333 final double det = a * d - c * b;
334
335 if (Math.abs(det) <= (2.0f * Float.MIN_VALUE)) {
336 // this rendering engine takes one dimensional curves and turns
337 // them into 2D shapes by giving them width.
338 // However, if everything is to be passed through a singular
339 // transformation, these 2D shapes will be squashed down to 1D
340 // again so, nothing can be drawn.
341
342 // Every path needs an initial moveTo and a pathDone. If these
343 // are not there this causes a SIGSEGV in libawt.so (at the time
344 // of writing of this comment (September 16, 2010)). Actually,
345 // I am not sure if the moveTo is necessary to avoid the SIGSEGV
346 // but the pathDone is definitely needed.
347 pc2d.moveTo(0.0f, 0.0f);
348 pc2d.pathDone();
349 return;
350 }
351
352 // If the transform is a constant multiple of an orthogonal transformation
353 // then every length is just multiplied by a constant, so we just
354 // need to transform input paths to stroker and tell stroker
355 // the scaled width. This condition is satisfied if
356 // a*b == -c*d && a*a+c*c == b*b+d*d. In the actual check below, we
357 // leave a bit of room for error.
358 if (nearZero(a*b + c*d) && nearZero(a*a + c*c - (b*b + d*d))) {
359 final float scale = (float) Math.sqrt(a*a + c*c);
360
361 if (dashes != null) {
362 recycleDashes = true;
363 dashLen = dashes.length;
364 dashes = rdrCtx.dasher.copyDashArray(dashes);
365 for (int i = 0; i < dashLen; i++) {
366 dashes[i] *= scale;
367 }
368 dashphase *= scale;
369 }
370 width *= scale;
371
372 // by now strokerat == null. Input paths to
373 // stroker (and maybe dasher) will have the full transform at
374 // applied to them and nothing will happen to the output paths.
375 } else {
376 strokerat = at;
377
378 // by now strokerat == at. Input paths to
379 // stroker (and maybe dasher) will have the full transform at
380 // applied to them, then they will be normalized, and then
381 // the inverse of *only the non translation part of at* will
382 // be applied to the normalized paths. This won't cause problems
383 // in stroker, because, suppose at = T*A, where T is just the
384 // translation part of at, and A is the rest. T*A has already
385 // been applied to Stroker/Dasher's input. Then Ainv will be
386 // applied. Ainv*T*A is not equal to T, but it is a translation,
387 // which means that none of stroker's assumptions about its
388 // input will be violated. After all this, A will be applied
389 // to stroker's output.
390 }
391 } else {
392 // either at is null or it's the identity. In either case
393 // we don't transform the path.
394 at = null;
395 }
396
397 if (USE_SIMPLIFIER) {
398 // Use simplifier after stroker before Renderer
399 // to remove collinear segments (notably due to cap square)
400 pc2d = rdrCtx.simplifier.init(pc2d);
401 }
402
403 final TransformingPathConsumer2D transformerPC2D = rdrCtx.transformerPC2D;
404 pc2d = transformerPC2D.deltaTransformConsumer(pc2d, strokerat);
405
406 pc2d = rdrCtx.stroker.init(pc2d, width, caps, join, miterlimit);
407
408 if (dashes != null) {
409 if (!recycleDashes) {
410 dashLen = dashes.length;
411 }
412 pc2d = rdrCtx.dasher.init(pc2d, dashes, dashLen, dashphase,
413 recycleDashes);
414 }
415 pc2d = transformerPC2D.inverseDeltaTransformConsumer(pc2d, strokerat);
416
417 final PathIterator pi = norm.getNormalizingPathIterator(rdrCtx,
418 src.getPathIterator(at));
419
420 pathTo(rdrCtx, pi, pc2d);
421
422 /*
423 * Pipeline seems to be:
424 * shape.getPathIterator(at)
425 * -> (NormalizingPathIterator)
426 * -> (inverseDeltaTransformConsumer)
427 * -> (Dasher)
428 * -> Stroker
429 * -> (deltaTransformConsumer)
430 *
431 * -> (CollinearSimplifier) to remove redundant segments
432 *
433 * -> pc2d = Renderer (bounding box)
434 */
435 }
436
437 private static boolean nearZero(final double num) {
438 return Math.abs(num) < 2.0d * Math.ulp(num);
439 }
440
441 abstract static class NormalizingPathIterator implements PathIterator {
442
443 private PathIterator src;
444
445 // the adjustment applied to the current position.
446 private float curx_adjust, cury_adjust;
447 // the adjustment applied to the last moveTo position.
448 private float movx_adjust, movy_adjust;
449
450 private final float[] tmp;
451
452 NormalizingPathIterator(final float[] tmp) {
453 this.tmp = tmp;
454 }
455
456 final NormalizingPathIterator init(final PathIterator src) {
457 this.src = src;
458 return this; // fluent API
459 }
460
461 /**
462 * Disposes this path iterator:
463 * clean up before reusing this instance
464 */
465 final void dispose() {
466 // free source PathIterator:
467 this.src = null;
468 }
469
470 @Override
471 public final int currentSegment(final float[] coords) {
472 int lastCoord;
473 final int type = src.currentSegment(coords);
474
475 switch(type) {
476 case PathIterator.SEG_MOVETO:
477 case PathIterator.SEG_LINETO:
478 lastCoord = 0;
479 break;
480 case PathIterator.SEG_QUADTO:
481 lastCoord = 2;
482 break;
483 case PathIterator.SEG_CUBICTO:
484 lastCoord = 4;
485 break;
486 case PathIterator.SEG_CLOSE:
487 // we don't want to deal with this case later. We just exit now
488 curx_adjust = movx_adjust;
489 cury_adjust = movy_adjust;
490 return type;
491 default:
492 throw new InternalError("Unrecognized curve type");
493 }
494
495 // normalize endpoint
496 float coord, x_adjust, y_adjust;
497
498 coord = coords[lastCoord];
499 x_adjust = normCoord(coord); // new coord
500 coords[lastCoord] = x_adjust;
501 x_adjust -= coord;
502
503 coord = coords[lastCoord + 1];
504 y_adjust = normCoord(coord); // new coord
505 coords[lastCoord + 1] = y_adjust;
506 y_adjust -= coord;
507
508 // now that the end points are done, normalize the control points
509 switch(type) {
510 case PathIterator.SEG_MOVETO:
511 movx_adjust = x_adjust;
512 movy_adjust = y_adjust;
513 break;
514 case PathIterator.SEG_LINETO:
515 break;
516 case PathIterator.SEG_QUADTO:
517 coords[0] += (curx_adjust + x_adjust) / 2.0f;
518 coords[1] += (cury_adjust + y_adjust) / 2.0f;
519 break;
520 case PathIterator.SEG_CUBICTO:
521 coords[0] += curx_adjust;
522 coords[1] += cury_adjust;
523 coords[2] += x_adjust;
524 coords[3] += y_adjust;
525 break;
526 case PathIterator.SEG_CLOSE:
527 // handled earlier
528 default:
529 }
530 curx_adjust = x_adjust;
531 cury_adjust = y_adjust;
532 return type;
533 }
534
535 abstract float normCoord(final float coord);
536
537 @Override
538 public final int currentSegment(final double[] coords) {
539 final float[] _tmp = tmp; // dirty
540 int type = this.currentSegment(_tmp);
541 for (int i = 0; i < 6; i++) {
542 coords[i] = _tmp[i];
543 }
544 return type;
545 }
546
547 @Override
548 public final int getWindingRule() {
549 return src.getWindingRule();
550 }
551
552 @Override
553 public final boolean isDone() {
554 if (src.isDone()) {
555 // Dispose this instance:
556 dispose();
557 return true;
558 }
559 return false;
560 }
561
562 @Override
563 public final void next() {
564 src.next();
565 }
566
567 static final class NearestPixelCenter
568 extends NormalizingPathIterator
569 {
570 NearestPixelCenter(final float[] tmp) {
571 super(tmp);
572 }
573
574 @Override
575 float normCoord(final float coord) {
576 // round to nearest pixel center
577 return FloatMath.floor_f(coord) + 0.5f;
578 }
579 }
580
581 static final class NearestPixelQuarter
582 extends NormalizingPathIterator
583 {
584 NearestPixelQuarter(final float[] tmp) {
585 super(tmp);
586 }
587
588 @Override
589 float normCoord(final float coord) {
590 // round to nearest (0.25, 0.25) pixel quarter
591 return FloatMath.floor_f(coord + 0.25f) + 0.25f;
592 }
593 }
594 }
595
596 private static void pathTo(final RendererContext rdrCtx, final PathIterator pi,
597 final PathConsumer2D pc2d)
598 {
599 // mark context as DIRTY:
600 rdrCtx.dirty = true;
601
602 final float[] coords = rdrCtx.float6;
603
604 pathToLoop(coords, pi, pc2d);
605
606 // mark context as CLEAN:
607 rdrCtx.dirty = false;
608 }
609
610 private static void pathToLoop(final float[] coords, final PathIterator pi,
611 final PathConsumer2D pc2d)
612 {
613 // ported from DuctusRenderingEngine.feedConsumer() but simplified:
614 // - removed skip flag = !subpathStarted
615 // - removed pathClosed (ie subpathStarted not set to false)
616 boolean subpathStarted = false;
617
618 for (; !pi.isDone(); pi.next()) {
619 switch (pi.currentSegment(coords)) {
620 case PathIterator.SEG_MOVETO:
621 /* Checking SEG_MOVETO coordinates if they are out of the
622 * [LOWER_BND, UPPER_BND] range. This check also handles NaN
623 * and Infinity values. Skipping next path segment in case of
624 * invalid data.
625 */
626 if (coords[0] < UPPER_BND && coords[0] > LOWER_BND &&
627 coords[1] < UPPER_BND && coords[1] > LOWER_BND)
628 {
629 pc2d.moveTo(coords[0], coords[1]);
630 subpathStarted = true;
631 }
632 break;
633 case PathIterator.SEG_LINETO:
634 /* Checking SEG_LINETO coordinates if they are out of the
635 * [LOWER_BND, UPPER_BND] range. This check also handles NaN
636 * and Infinity values. Ignoring current path segment in case
637 * of invalid data. If segment is skipped its endpoint
638 * (if valid) is used to begin new subpath.
639 */
640 if (coords[0] < UPPER_BND && coords[0] > LOWER_BND &&
641 coords[1] < UPPER_BND && coords[1] > LOWER_BND)
642 {
643 if (subpathStarted) {
644 pc2d.lineTo(coords[0], coords[1]);
645 } else {
646 pc2d.moveTo(coords[0], coords[1]);
647 subpathStarted = true;
648 }
649 }
650 break;
651 case PathIterator.SEG_QUADTO:
652 // Quadratic curves take two points
653 /* Checking SEG_QUADTO coordinates if they are out of the
654 * [LOWER_BND, UPPER_BND] range. This check also handles NaN
655 * and Infinity values. Ignoring current path segment in case
656 * of invalid endpoints's data. Equivalent to the SEG_LINETO
657 * if endpoint coordinates are valid but there are invalid data
658 * among other coordinates
659 */
660 if (coords[2] < UPPER_BND && coords[2] > LOWER_BND &&
661 coords[3] < UPPER_BND && coords[3] > LOWER_BND)
662 {
663 if (subpathStarted) {
664 if (coords[0] < UPPER_BND && coords[0] > LOWER_BND &&
665 coords[1] < UPPER_BND && coords[1] > LOWER_BND)
666 {
667 pc2d.quadTo(coords[0], coords[1],
668 coords[2], coords[3]);
669 } else {
670 pc2d.lineTo(coords[2], coords[3]);
671 }
672 } else {
673 pc2d.moveTo(coords[2], coords[3]);
674 subpathStarted = true;
675 }
676 }
677 break;
678 case PathIterator.SEG_CUBICTO:
679 // Cubic curves take three points
680 /* Checking SEG_CUBICTO coordinates if they are out of the
681 * [LOWER_BND, UPPER_BND] range. This check also handles NaN
682 * and Infinity values. Ignoring current path segment in case
683 * of invalid endpoints's data. Equivalent to the SEG_LINETO
684 * if endpoint coordinates are valid but there are invalid data
685 * among other coordinates
686 */
687 if (coords[4] < UPPER_BND && coords[4] > LOWER_BND &&
688 coords[5] < UPPER_BND && coords[5] > LOWER_BND)
689 {
690 if (subpathStarted) {
691 if (coords[0] < UPPER_BND && coords[0] > LOWER_BND &&
692 coords[1] < UPPER_BND && coords[1] > LOWER_BND &&
693 coords[2] < UPPER_BND && coords[2] > LOWER_BND &&
694 coords[3] < UPPER_BND && coords[3] > LOWER_BND)
695 {
696 pc2d.curveTo(coords[0], coords[1],
697 coords[2], coords[3],
698 coords[4], coords[5]);
699 } else {
700 pc2d.lineTo(coords[4], coords[5]);
701 }
702 } else {
703 pc2d.moveTo(coords[4], coords[5]);
704 subpathStarted = true;
705 }
706 }
707 break;
708 case PathIterator.SEG_CLOSE:
709 if (subpathStarted) {
710 pc2d.closePath();
711 // do not set subpathStarted to false
712 // in case of missing moveTo() after close()
713 }
714 break;
715 default:
716 }
717 }
718 pc2d.pathDone();
719 }
720
721 /**
722 * Construct an antialiased tile generator for the given shape with
723 * the given rendering attributes and store the bounds of the tile
724 * iteration in the bbox parameter.
725 * The {@code at} parameter specifies a transform that should affect
726 * both the shape and the {@code BasicStroke} attributes.
727 * The {@code clip} parameter specifies the current clip in effect
728 * in device coordinates and can be used to prune the data for the
729 * operation, but the renderer is not required to perform any
730 * clipping.
731 * If the {@code BasicStroke} parameter is null then the shape
732 * should be filled as is, otherwise the attributes of the
733 * {@code BasicStroke} should be used to specify a draw operation.
734 * The {@code thin} parameter indicates whether or not the
735 * transformed {@code BasicStroke} represents coordinates smaller
736 * than the minimum resolution of the antialiasing rasterizer as
737 * specified by the {@code getMinimumAAPenWidth()} method.
738 * <p>
739 * Upon returning, this method will fill the {@code bbox} parameter
740 * with 4 values indicating the bounds of the iteration of the
741 * tile generator.
742 * The iteration order of the tiles will be as specified by the
743 * pseudo-code:
744 * <pre>
745 * for (y = bbox[1]; y < bbox[3]; y += tileheight) {
746 * for (x = bbox[0]; x < bbox[2]; x += tilewidth) {
747 * }
748 * }
749 * </pre>
750 * If there is no output to be rendered, this method may return
751 * null.
752 *
753 * @param s the shape to be rendered (fill or draw)
754 * @param at the transform to be applied to the shape and the
755 * stroke attributes
756 * @param clip the current clip in effect in device coordinates
757 * @param bs if non-null, a {@code BasicStroke} whose attributes
758 * should be applied to this operation
759 * @param thin true if the transformed stroke attributes are smaller
760 * than the minimum dropout pen width
761 * @param normalize true if the {@code VALUE_STROKE_NORMALIZE}
762 * {@code RenderingHint} is in effect
763 * @param bbox returns the bounds of the iteration
764 * @return the {@code AATileGenerator} instance to be consulted
765 * for tile coverages, or null if there is no output to render
766 * @since 1.7
767 */
768 @Override
769 public AATileGenerator getAATileGenerator(Shape s,
770 AffineTransform at,
771 Region clip,
772 BasicStroke bs,
773 boolean thin,
774 boolean normalize,
775 int[] bbox)
776 {
777 MarlinTileGenerator ptg = null;
778 Renderer r = null;
779
780 final RendererContext rdrCtx = getRendererContext();
781 try {
782 // Test if at is identity:
783 final AffineTransform _at = (at != null && !at.isIdentity()) ? at
784 : null;
785
786 final NormMode norm = (normalize) ? NormMode.ON_WITH_AA : NormMode.OFF;
787
788 if (bs == null) {
789 // fill shape:
790 final PathIterator pi = norm.getNormalizingPathIterator(rdrCtx,
791 s.getPathIterator(_at));
792
793 // note: Winding rule may be EvenOdd ONLY for fill operations !
794 r = rdrCtx.renderer.init(clip.getLoX(), clip.getLoY(),
795 clip.getWidth(), clip.getHeight(),
796 pi.getWindingRule());
797
798 // TODO: subdivide quad/cubic curves into monotonic curves ?
799 pathTo(rdrCtx, pi, r);
800 } else {
801 // draw shape with given stroke:
802 r = rdrCtx.renderer.init(clip.getLoX(), clip.getLoY(),
803 clip.getWidth(), clip.getHeight(),
804 PathIterator.WIND_NON_ZERO);
805
806 strokeTo(rdrCtx, s, _at, bs, thin, norm, true, r);
807 }
808 if (r.endRendering()) {
809 ptg = rdrCtx.ptg.init();
810 ptg.getBbox(bbox);
811 // note: do not returnRendererContext(rdrCtx)
812 // as it will be called later by MarlinTileGenerator.dispose()
813 r = null;
814 }
815 } finally {
816 if (r != null) {
817 // dispose renderer and recycle the RendererContext instance:
818 r.dispose();
819 }
820 }
821
822 // Return null to cancel AA tile generation (nothing to render)
823 return ptg;
824 }
825
826 @Override
827 public final AATileGenerator getAATileGenerator(double x, double y,
828 double dx1, double dy1,
829 double dx2, double dy2,
830 double lw1, double lw2,
831 Region clip,
832 int[] bbox)
833 {
834 // REMIND: Deal with large coordinates!
835 double ldx1, ldy1, ldx2, ldy2;
836 boolean innerpgram = (lw1 > 0.0d && lw2 > 0.0d);
837
838 if (innerpgram) {
839 ldx1 = dx1 * lw1;
840 ldy1 = dy1 * lw1;
841 ldx2 = dx2 * lw2;
842 ldy2 = dy2 * lw2;
843 x -= (ldx1 + ldx2) / 2.0d;
844 y -= (ldy1 + ldy2) / 2.0d;
845 dx1 += ldx1;
846 dy1 += ldy1;
847 dx2 += ldx2;
848 dy2 += ldy2;
849 if (lw1 > 1.0d && lw2 > 1.0d) {
850 // Inner parallelogram was entirely consumed by stroke...
851 innerpgram = false;
852 }
853 } else {
854 ldx1 = ldy1 = ldx2 = ldy2 = 0.0d;
855 }
856
857 MarlinTileGenerator ptg = null;
858 Renderer r = null;
859
860 final RendererContext rdrCtx = getRendererContext();
861 try {
862 r = rdrCtx.renderer.init(clip.getLoX(), clip.getLoY(),
863 clip.getWidth(), clip.getHeight(),
864 Renderer.WIND_EVEN_ODD);
865
866 r.moveTo((float) x, (float) y);
867 r.lineTo((float) (x+dx1), (float) (y+dy1));
868 r.lineTo((float) (x+dx1+dx2), (float) (y+dy1+dy2));
869 r.lineTo((float) (x+dx2), (float) (y+dy2));
870 r.closePath();
871
872 if (innerpgram) {
873 x += ldx1 + ldx2;
874 y += ldy1 + ldy2;
875 dx1 -= 2.0d * ldx1;
876 dy1 -= 2.0d * ldy1;
877 dx2 -= 2.0d * ldx2;
878 dy2 -= 2.0d * ldy2;
879 r.moveTo((float) x, (float) y);
880 r.lineTo((float) (x+dx1), (float) (y+dy1));
881 r.lineTo((float) (x+dx1+dx2), (float) (y+dy1+dy2));
882 r.lineTo((float) (x+dx2), (float) (y+dy2));
883 r.closePath();
884 }
885 r.pathDone();
886
887 if (r.endRendering()) {
888 ptg = rdrCtx.ptg.init();
889 ptg.getBbox(bbox);
890 // note: do not returnRendererContext(rdrCtx)
891 // as it will be called later by MarlinTileGenerator.dispose()
892 r = null;
893 }
894 } finally {
895 if (r != null) {
896 // dispose renderer and recycle the RendererContext instance:
897 r.dispose();
898 }
899 }
900
901 // Return null to cancel AA tile generation (nothing to render)
902 return ptg;
903 }
904
905 /**
906 * Returns the minimum pen width that the antialiasing rasterizer
907 * can represent without dropouts occuring.
908 * @since 1.7
909 */
910 @Override
911 public float getMinimumAAPenSize() {
912 return MIN_PEN_SIZE;
913 }
914
915 static {
916 if (PathIterator.WIND_NON_ZERO != Renderer.WIND_NON_ZERO ||
917 PathIterator.WIND_EVEN_ODD != Renderer.WIND_EVEN_ODD ||
918 BasicStroke.JOIN_MITER != Stroker.JOIN_MITER ||
919 BasicStroke.JOIN_ROUND != Stroker.JOIN_ROUND ||
920 BasicStroke.JOIN_BEVEL != Stroker.JOIN_BEVEL ||
921 BasicStroke.CAP_BUTT != Stroker.CAP_BUTT ||
922 BasicStroke.CAP_ROUND != Stroker.CAP_ROUND ||
923 BasicStroke.CAP_SQUARE != Stroker.CAP_SQUARE)
924 {
925 throw new InternalError("mismatched renderer constants");
926 }
927 }
928
929 // --- RendererContext handling ---
930 // use ThreadLocal or ConcurrentLinkedQueue to get one RendererContext
931 private static final boolean USE_THREAD_LOCAL;
932
933 // reference type stored in either TL or CLQ
934 static final int REF_TYPE;
935
936 // Per-thread RendererContext
937 private static final ReentrantContextProvider<RendererContext> RDR_CTX_PROVIDER;
938
939 // Static initializer to use TL or CLQ mode
940 static {
941 USE_THREAD_LOCAL = MarlinProperties.isUseThreadLocal();
942
943 // Soft reference by default:
944 final String refType = AccessController.doPrivileged(
945 new GetPropertyAction("sun.java2d.renderer.useRef",
946 "soft"));
947 switch (refType) {
948 default:
949 case "soft":
950 REF_TYPE = ReentrantContextProvider.REF_SOFT;
951 break;
952 case "weak":
953 REF_TYPE = ReentrantContextProvider.REF_WEAK;
954 break;
955 case "hard":
956 REF_TYPE = ReentrantContextProvider.REF_HARD;
957 break;
958 }
959
960 if (USE_THREAD_LOCAL) {
961 RDR_CTX_PROVIDER = new ReentrantContextProviderTL<RendererContext>(REF_TYPE)
962 {
963 @Override
964 protected RendererContext newContext() {
965 return RendererContext.createContext();
966 }
967 };
968 } else {
969 RDR_CTX_PROVIDER = new ReentrantContextProviderCLQ<RendererContext>(REF_TYPE)
970 {
971 @Override
972 protected RendererContext newContext() {
973 return RendererContext.createContext();
974 }
975 };
976 }
977 }
978
979 private static boolean SETTINGS_LOGGED = !ENABLE_LOGS;
980
981 private static void logSettings(final String reClass) {
982 // log information at startup
983 if (SETTINGS_LOGGED) {
984 return;
985 }
986 SETTINGS_LOGGED = true;
987
988 String refType;
989 switch (REF_TYPE) {
990 default:
991 case ReentrantContextProvider.REF_HARD:
992 refType = "hard";
993 break;
994 case ReentrantContextProvider.REF_SOFT:
995 refType = "soft";
996 break;
997 case ReentrantContextProvider.REF_WEAK:
998 refType = "weak";
999 break;
1000 }
1001
1002 logInfo("=========================================================="
1003 + "=====================");
1004
1005 logInfo("Marlin software rasterizer = ENABLED");
1006 logInfo("Version = ["
1007 + Version.getVersion() + "]");
1008 logInfo("sun.java2d.renderer = "
1009 + reClass);
1010 logInfo("sun.java2d.renderer.useThreadLocal = "
1011 + USE_THREAD_LOCAL);
1012 logInfo("sun.java2d.renderer.useRef = "
1013 + refType);
1014
1015 logInfo("sun.java2d.renderer.edges = "
1016 + MarlinConst.INITIAL_EDGES_COUNT);
1017 logInfo("sun.java2d.renderer.pixelsize = "
1018 + MarlinConst.INITIAL_PIXEL_DIM);
1019
1020 logInfo("sun.java2d.renderer.subPixel_log2_X = "
1021 + MarlinConst.SUBPIXEL_LG_POSITIONS_X);
1022 logInfo("sun.java2d.renderer.subPixel_log2_Y = "
1023 + MarlinConst.SUBPIXEL_LG_POSITIONS_Y);
1024
1025 logInfo("sun.java2d.renderer.tileSize_log2 = "
1026 + MarlinConst.TILE_H_LG);
1027 logInfo("sun.java2d.renderer.tileWidth_log2 = "
1028 + MarlinConst.TILE_W_LG);
1029 logInfo("sun.java2d.renderer.blockSize_log2 = "
1030 + MarlinConst.BLOCK_SIZE_LG);
1031
1032 // RLE / blockFlags settings
1033
1034 logInfo("sun.java2d.renderer.forceRLE = "
1035 + MarlinProperties.isForceRLE());
1036 logInfo("sun.java2d.renderer.forceNoRLE = "
1037 + MarlinProperties.isForceNoRLE());
1038 logInfo("sun.java2d.renderer.useTileFlags = "
1039 + MarlinProperties.isUseTileFlags());
1040 logInfo("sun.java2d.renderer.useTileFlags.useHeuristics = "
1041 + MarlinProperties.isUseTileFlagsWithHeuristics());
1042 logInfo("sun.java2d.renderer.rleMinWidth = "
1043 + MarlinCache.RLE_MIN_WIDTH);
1044
1045 // optimisation parameters
1046 logInfo("sun.java2d.renderer.useSimplifier = "
1047 + MarlinConst.USE_SIMPLIFIER);
1048
1049 // debugging parameters
1050 logInfo("sun.java2d.renderer.doStats = "
1051 + MarlinConst.DO_STATS);
1052 logInfo("sun.java2d.renderer.doMonitors = "
1053 + MarlinConst.DO_MONITORS);
1054 logInfo("sun.java2d.renderer.doChecks = "
1055 + MarlinConst.DO_CHECKS);
1056
1057 // logging parameters
1058 logInfo("sun.java2d.renderer.useLogger = "
1059 + MarlinConst.USE_LOGGER);
1060 logInfo("sun.java2d.renderer.logCreateContext = "
1061 + MarlinConst.LOG_CREATE_CONTEXT);
1062 logInfo("sun.java2d.renderer.logUnsafeMalloc = "
1063 + MarlinConst.LOG_UNSAFE_MALLOC);
1064
1065 // quality settings
1066 logInfo("sun.java2d.renderer.cubic_dec_d2 = "
1067 + MarlinProperties.getCubicDecD2());
1068 logInfo("sun.java2d.renderer.cubic_inc_d1 = "
1069 + MarlinProperties.getCubicIncD1());
1070 logInfo("sun.java2d.renderer.quad_dec_d2 = "
1071 + MarlinProperties.getQuadDecD2());
1072
1073 logInfo("Renderer settings:");
1074 logInfo("CUB_DEC_BND = " + Renderer.CUB_DEC_BND);
1075 logInfo("CUB_INC_BND = " + Renderer.CUB_INC_BND);
1076 logInfo("QUAD_DEC_BND = " + Renderer.QUAD_DEC_BND);
1077
1078 logInfo("INITIAL_EDGES_CAPACITY = "
1079 + MarlinConst.INITIAL_EDGES_CAPACITY);
1080 logInfo("INITIAL_CROSSING_COUNT = "
1081 + Renderer.INITIAL_CROSSING_COUNT);
1082
1083 logInfo("=========================================================="
1084 + "=====================");
1085 }
1086
1087 /**
1088 * Get the RendererContext instance dedicated to the current thread
1089 * @return RendererContext instance
1090 */
1091 @SuppressWarnings({"unchecked"})
1092 static RendererContext getRendererContext() {
1093 final RendererContext rdrCtx = RDR_CTX_PROVIDER.acquire();
1094 if (DO_MONITORS) {
1095 rdrCtx.stats.mon_pre_getAATileGenerator.start();
1096 }
1097 return rdrCtx;
1098 }
1099
1100 /**
1101 * Reset and return the given RendererContext instance for reuse
1102 * @param rdrCtx RendererContext instance
1103 */
1104 static void returnRendererContext(final RendererContext rdrCtx) {
1105 rdrCtx.dispose();
1106
1107 if (DO_MONITORS) {
1108 rdrCtx.stats.mon_pre_getAATileGenerator.stop();
1109 }
1110 RDR_CTX_PROVIDER.release(rdrCtx);
1111 }
1112 }