1 /*
2 * Copyright (c) 1996, 2013, 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;
27
28 import java.awt.Graphics;
29 import java.awt.Graphics2D;
30 import java.awt.RenderingHints;
31 import java.awt.RenderingHints.Key;
32 import java.awt.geom.Area;
33 import java.awt.geom.AffineTransform;
34 import java.awt.geom.NoninvertibleTransformException;
35 import java.awt.AlphaComposite;
36 import java.awt.BasicStroke;
37 import java.awt.image.BufferedImage;
38 import java.awt.image.BufferedImageOp;
39 import java.awt.image.RenderedImage;
40 import java.awt.image.renderable.RenderableImage;
41 import java.awt.image.renderable.RenderContext;
42 import java.awt.image.AffineTransformOp;
43 import java.awt.image.Raster;
44 import java.awt.image.WritableRaster;
45 import java.awt.Image;
46 import java.awt.Composite;
47 import java.awt.Color;
48 import java.awt.image.ColorModel;
49 import java.awt.GraphicsConfiguration;
50 import java.awt.Paint;
51 import java.awt.GradientPaint;
52 import java.awt.LinearGradientPaint;
53 import java.awt.RadialGradientPaint;
54 import java.awt.TexturePaint;
55 import java.awt.geom.Rectangle2D;
56 import java.awt.geom.PathIterator;
57 import java.awt.geom.GeneralPath;
58 import java.awt.Shape;
59 import java.awt.Stroke;
60 import java.awt.FontMetrics;
61 import java.awt.Rectangle;
62 import java.text.AttributedCharacterIterator;
63 import java.awt.Font;
64 import java.awt.image.ImageObserver;
65 import java.awt.Transparency;
66 import java.awt.font.GlyphVector;
67 import java.awt.font.TextLayout;
68 import sun.font.FontDesignMetrics;
69 import sun.font.FontUtilities;
70 import sun.java2d.pipe.PixelDrawPipe;
71 import sun.java2d.pipe.PixelFillPipe;
72 import sun.java2d.pipe.ShapeDrawPipe;
73 import sun.java2d.pipe.ValidatePipe;
74 import sun.java2d.pipe.ShapeSpanIterator;
75 import sun.java2d.pipe.Region;
76 import sun.java2d.pipe.TextPipe;
77 import sun.java2d.pipe.DrawImagePipe;
78 import sun.java2d.pipe.LoopPipe;
79 import sun.java2d.loops.FontInfo;
80 import sun.java2d.loops.RenderLoops;
81 import sun.java2d.loops.CompositeType;
82 import sun.java2d.loops.SurfaceType;
83 import sun.java2d.loops.Blit;
84 import sun.java2d.loops.MaskFill;
85 import sun.font.FontManager;
86 import java.awt.font.FontRenderContext;
87 import sun.java2d.loops.XORComposite;
88 import sun.awt.ConstrainableGraphics;
89 import sun.awt.SunHints;
90 import java.util.Map;
91 import java.util.Iterator;
92 import sun.java2d.DestSurfaceProvider;
93 import sun.misc.PerformanceLogger;
94
95 import java.lang.annotation.Native;
96
97 /**
98 * This is a the master Graphics2D superclass for all of the Sun
99 * Graphics implementations. This class relies on subclasses to
100 * manage the various device information, but provides an overall
101 * general framework for performing all of the requests in the
102 * Graphics and Graphics2D APIs.
103 *
104 * @author Jim Graham
105 */
106 public final class SunGraphics2D
107 extends Graphics2D
108 implements ConstrainableGraphics, Cloneable, DestSurfaceProvider
109 {
110 /*
111 * Attribute States
112 */
113 /* Paint */
114 @Native public static final int PAINT_CUSTOM = 6; /* Any other Paint object */
115 @Native public static final int PAINT_TEXTURE = 5; /* Tiled Image */
116 @Native public static final int PAINT_RAD_GRADIENT = 4; /* Color RadialGradient */
117 @Native public static final int PAINT_LIN_GRADIENT = 3; /* Color LinearGradient */
118 @Native public static final int PAINT_GRADIENT = 2; /* Color Gradient */
119 @Native public static final int PAINT_ALPHACOLOR = 1; /* Non-opaque Color */
120 @Native public static final int PAINT_OPAQUECOLOR = 0; /* Opaque Color */
121
122 /* Composite*/
123 @Native public static final int COMP_CUSTOM = 3;/* Custom Composite */
124 @Native public static final int COMP_XOR = 2;/* XOR Mode Composite */
125 @Native public static final int COMP_ALPHA = 1;/* AlphaComposite */
126 @Native public static final int COMP_ISCOPY = 0;/* simple stores into destination,
127 * i.e. Src, SrcOverNoEa, and other
128 * alpha modes which replace
129 * the destination.
130 */
131
132 /* Stroke */
133 @Native public static final int STROKE_CUSTOM = 3; /* custom Stroke */
134 @Native public static final int STROKE_WIDE = 2; /* BasicStroke */
135 @Native public static final int STROKE_THINDASHED = 1; /* BasicStroke */
136 @Native public static final int STROKE_THIN = 0; /* BasicStroke */
137
138 /* Transform */
139 @Native public static final int TRANSFORM_GENERIC = 4; /* any 3x2 */
140 @Native public static final int TRANSFORM_TRANSLATESCALE = 3; /* scale XY */
141 @Native public static final int TRANSFORM_ANY_TRANSLATE = 2; /* non-int translate */
142 @Native public static final int TRANSFORM_INT_TRANSLATE = 1; /* int translate */
143 @Native public static final int TRANSFORM_ISIDENT = 0; /* Identity */
144
145 /* Clipping */
146 @Native public static final int CLIP_SHAPE = 2; /* arbitrary clip */
147 @Native public static final int CLIP_RECTANGULAR = 1; /* rectangular clip */
148 @Native public static final int CLIP_DEVICE = 0; /* no clipping set */
149
150 /* The following fields are used when the current Paint is a Color. */
151 public int eargb; // ARGB value with ExtraAlpha baked in
152 public int pixel; // pixel value for eargb
153
154 public SurfaceData surfaceData;
155
156 public PixelDrawPipe drawpipe;
157 public PixelFillPipe fillpipe;
158 public DrawImagePipe imagepipe;
159 public ShapeDrawPipe shapepipe;
160 public TextPipe textpipe;
161 public MaskFill alphafill;
162
163 public RenderLoops loops;
164
165 public CompositeType imageComp; /* Image Transparency checked on fly */
166
167 public int paintState;
168 public int compositeState;
169 public int strokeState;
170 public int transformState;
171 public int clipState;
172
173 public Color foregroundColor;
174 public Color backgroundColor;
175
176 public AffineTransform transform;
177 public int transX;
178 public int transY;
179
180 protected static final Stroke defaultStroke = new BasicStroke();
181 protected static final Composite defaultComposite = AlphaComposite.SrcOver;
182 private static final Font defaultFont =
183 new Font(Font.DIALOG, Font.PLAIN, 12);
184
185 public Paint paint;
186 public Stroke stroke;
187 public Composite composite;
188 protected Font font;
189 protected FontMetrics fontMetrics;
190
191 public int renderHint;
192 public int antialiasHint;
193 public int textAntialiasHint;
194 protected int fractionalMetricsHint;
195
196 /* A gamma adjustment to the colour used in lcd text blitting */
197 public int lcdTextContrast;
198 private static int lcdTextContrastDefaultValue = 140;
199
200 private int interpolationHint; // raw value of rendering Hint
201 public int strokeHint;
202
203 public int interpolationType; // algorithm choice based on
204 // interpolation and render Hints
205
206 public RenderingHints hints;
207
208 public Region constrainClip; // lightweight bounds
209 public int constrainX;
210 public int constrainY;
211
212 public Region clipRegion;
213 public Shape usrClip;
214 protected Region devClip; // Actual physical drawable
215
216 // cached state for text rendering
217 private boolean validFontInfo;
218 private FontInfo fontInfo;
219 private FontInfo glyphVectorFontInfo;
220 private FontRenderContext glyphVectorFRC;
221
222 private final static int slowTextTransformMask =
223 AffineTransform.TYPE_GENERAL_TRANSFORM
224 | AffineTransform.TYPE_MASK_ROTATION
225 | AffineTransform.TYPE_FLIP;
226
227 static {
228 if (PerformanceLogger.loggingEnabled()) {
229 PerformanceLogger.setTime("SunGraphics2D static initialization");
230 }
231 }
232
233 public SunGraphics2D(SurfaceData sd, Color fg, Color bg, Font f) {
234 surfaceData = sd;
235 foregroundColor = fg;
236 backgroundColor = bg;
237
238 transform = new AffineTransform();
239 stroke = defaultStroke;
240 composite = defaultComposite;
241 paint = foregroundColor;
242
243 imageComp = CompositeType.SrcOverNoEa;
244
245 renderHint = SunHints.INTVAL_RENDER_DEFAULT;
246 antialiasHint = SunHints.INTVAL_ANTIALIAS_OFF;
247 textAntialiasHint = SunHints.INTVAL_TEXT_ANTIALIAS_DEFAULT;
248 fractionalMetricsHint = SunHints.INTVAL_FRACTIONALMETRICS_OFF;
249 lcdTextContrast = lcdTextContrastDefaultValue;
250 interpolationHint = -1;
251 strokeHint = SunHints.INTVAL_STROKE_DEFAULT;
252
253 interpolationType = AffineTransformOp.TYPE_NEAREST_NEIGHBOR;
254
255 validateColor();
256
257 font = f;
258 if (font == null) {
259 font = defaultFont;
260 }
261
262 setDevClip(sd.getBounds());
263 invalidatePipe();
264 }
265
266 protected Object clone() {
267 try {
268 SunGraphics2D g = (SunGraphics2D) super.clone();
269 g.transform = new AffineTransform(this.transform);
270 if (hints != null) {
271 g.hints = (RenderingHints) this.hints.clone();
272 }
273 /* FontInfos are re-used, so must be cloned too, if they
274 * are valid, and be nulled out if invalid.
275 * The implied trade-off is that there is more to be gained
276 * from re-using these objects than is lost by having to
277 * clone them when the SG2D is cloned.
278 */
279 if (this.fontInfo != null) {
280 if (this.validFontInfo) {
281 g.fontInfo = (FontInfo)this.fontInfo.clone();
282 } else {
283 g.fontInfo = null;
284 }
285 }
286 if (this.glyphVectorFontInfo != null) {
287 g.glyphVectorFontInfo =
288 (FontInfo)this.glyphVectorFontInfo.clone();
289 g.glyphVectorFRC = this.glyphVectorFRC;
290 }
291 //g.invalidatePipe();
292 return g;
293 } catch (CloneNotSupportedException e) {
294 }
295 return null;
296 }
297
298 /**
299 * Create a new SunGraphics2D based on this one.
300 */
301 public Graphics create() {
302 return (Graphics) clone();
303 }
304
305 public void setDevClip(int x, int y, int w, int h) {
306 Region c = constrainClip;
307 if (c == null) {
308 devClip = Region.getInstanceXYWH(x, y, w, h);
309 } else {
310 devClip = c.getIntersectionXYWH(x, y, w, h);
311 }
312 validateCompClip();
313 }
314
315 public void setDevClip(Rectangle r) {
316 setDevClip(r.x, r.y, r.width, r.height);
317 }
318
319 /**
320 * Constrain rendering for lightweight objects.
321 *
322 * REMIND: This method will back off to the "workaround"
323 * of using translate and clipRect if the Graphics
324 * to be constrained has a complex transform. The
325 * drawback of the workaround is that the resulting
326 * clip and device origin cannot be "enforced".
327 *
328 * @exception IllegalStateException If the Graphics
329 * to be constrained has a complex transform.
330 */
331 public void constrain(int x, int y, int w, int h) {
332 if ((x|y) != 0) {
333 translate(x, y);
334 }
335 if (transformState >= TRANSFORM_TRANSLATESCALE) {
336 clipRect(0, 0, w, h);
337 return;
338 }
339 x = constrainX = transX;
340 y = constrainY = transY;
341 w = Region.dimAdd(x, w);
342 h = Region.dimAdd(y, h);
343 Region c = constrainClip;
344 if (c == null) {
345 c = Region.getInstanceXYXY(x, y, w, h);
346 } else {
347 c = c.getIntersectionXYXY(x, y, w, h);
348 if (c == constrainClip) {
349 // Common case to ignore
350 return;
351 }
352 }
353 constrainClip = c;
354 if (!devClip.isInsideQuickCheck(c)) {
355 devClip = devClip.getIntersection(c);
356 validateCompClip();
357 }
358 }
359
360 protected static ValidatePipe invalidpipe = new ValidatePipe();
361
362 /*
363 * Invalidate the pipeline
364 */
365 protected void invalidatePipe() {
366 drawpipe = invalidpipe;
367 fillpipe = invalidpipe;
368 shapepipe = invalidpipe;
369 textpipe = invalidpipe;
370 imagepipe = invalidpipe;
371 loops = null;
372 }
373
374 public void validatePipe() {
375 /* This workaround is for the situation when we update the Pipelines
376 * for invalid SurfaceData and run further code when the current
377 * pipeline doesn't support the type of new SurfaceData created during
378 * the current pipeline's work (in place of the invalid SurfaceData).
379 * Usually SurfaceData and Pipelines are repaired (through revalidateAll)
380 * and called again in the exception handlers */
381
382 if (!surfaceData.isValid()) {
383 throw new InvalidPipeException("attempt to validate Pipe with invalid SurfaceData");
384 }
385
386 surfaceData.validatePipe(this);
387 }
388
389 /*
390 * Intersect two Shapes by the simplest method, attempting to produce
391 * a simplified result.
392 * The boolean arguments keep1 and keep2 specify whether or not
393 * the first or second shapes can be modified during the operation
394 * or whether that shape must be "kept" unmodified.
395 */
396 Shape intersectShapes(Shape s1, Shape s2, boolean keep1, boolean keep2) {
397 if (s1 instanceof Rectangle && s2 instanceof Rectangle) {
398 return ((Rectangle) s1).intersection((Rectangle) s2);
399 }
400 if (s1 instanceof Rectangle2D) {
401 return intersectRectShape((Rectangle2D) s1, s2, keep1, keep2);
402 } else if (s2 instanceof Rectangle2D) {
403 return intersectRectShape((Rectangle2D) s2, s1, keep2, keep1);
404 }
405 return intersectByArea(s1, s2, keep1, keep2);
406 }
407
408 /*
409 * Intersect a Rectangle with a Shape by the simplest method,
410 * attempting to produce a simplified result.
411 * The boolean arguments keep1 and keep2 specify whether or not
412 * the first or second shapes can be modified during the operation
413 * or whether that shape must be "kept" unmodified.
414 */
415 Shape intersectRectShape(Rectangle2D r, Shape s,
416 boolean keep1, boolean keep2) {
417 if (s instanceof Rectangle2D) {
418 Rectangle2D r2 = (Rectangle2D) s;
419 Rectangle2D outrect;
420 if (!keep1) {
421 outrect = r;
422 } else if (!keep2) {
423 outrect = r2;
424 } else {
425 outrect = new Rectangle2D.Float();
426 }
427 double x1 = Math.max(r.getX(), r2.getX());
428 double x2 = Math.min(r.getX() + r.getWidth(),
429 r2.getX() + r2.getWidth());
430 double y1 = Math.max(r.getY(), r2.getY());
431 double y2 = Math.min(r.getY() + r.getHeight(),
432 r2.getY() + r2.getHeight());
433
434 if (((x2 - x1) < 0) || ((y2 - y1) < 0))
435 // Width or height is negative. No intersection.
436 outrect.setFrameFromDiagonal(0, 0, 0, 0);
437 else
438 outrect.setFrameFromDiagonal(x1, y1, x2, y2);
439 return outrect;
440 }
441 if (r.contains(s.getBounds2D())) {
442 if (keep2) {
443 s = cloneShape(s);
444 }
445 return s;
446 }
447 return intersectByArea(r, s, keep1, keep2);
448 }
449
450 protected static Shape cloneShape(Shape s) {
451 return new GeneralPath(s);
452 }
453
454 /*
455 * Intersect two Shapes using the Area class. Presumably other
456 * attempts at simpler intersection methods proved fruitless.
457 * The boolean arguments keep1 and keep2 specify whether or not
458 * the first or second shapes can be modified during the operation
459 * or whether that shape must be "kept" unmodified.
460 * @see #intersectShapes
461 * @see #intersectRectShape
462 */
463 Shape intersectByArea(Shape s1, Shape s2, boolean keep1, boolean keep2) {
464 Area a1, a2;
465
466 // First see if we can find an overwriteable source shape
467 // to use as our destination area to avoid duplication.
468 if (!keep1 && (s1 instanceof Area)) {
469 a1 = (Area) s1;
470 } else if (!keep2 && (s2 instanceof Area)) {
471 a1 = (Area) s2;
472 s2 = s1;
473 } else {
474 a1 = new Area(s1);
475 }
476
477 if (s2 instanceof Area) {
478 a2 = (Area) s2;
479 } else {
480 a2 = new Area(s2);
481 }
482
483 a1.intersect(a2);
484 if (a1.isRectangular()) {
485 return a1.getBounds();
486 }
487
488 return a1;
489 }
490
491 /*
492 * Intersect usrClip bounds and device bounds to determine the composite
493 * rendering boundaries.
494 */
495 public Region getCompClip() {
496 if (!surfaceData.isValid()) {
497 // revalidateAll() implicitly recalculcates the composite clip
498 revalidateAll();
499 }
500
501 return clipRegion;
502 }
503
504 public Font getFont() {
505 if (font == null) {
506 font = defaultFont;
507 }
508 return font;
509 }
510
511 private static final double[] IDENT_MATRIX = {1, 0, 0, 1};
512 private static final AffineTransform IDENT_ATX =
513 new AffineTransform();
514
515 private static final int MINALLOCATED = 8;
516 private static final int TEXTARRSIZE = 17;
517 private static double[][] textTxArr = new double[TEXTARRSIZE][];
518 private static AffineTransform[] textAtArr =
519 new AffineTransform[TEXTARRSIZE];
520
521 static {
522 for (int i=MINALLOCATED;i<TEXTARRSIZE;i++) {
523 textTxArr[i] = new double [] {i, 0, 0, i};
524 textAtArr[i] = new AffineTransform( textTxArr[i]);
525 }
526 }
527
528 // cached state for various draw[String,Char,Byte] optimizations
529 public FontInfo checkFontInfo(FontInfo info, Font font,
530 FontRenderContext frc) {
531 /* Do not create a FontInfo object as part of construction of an
532 * SG2D as its possible it may never be needed - ie if no text
533 * is drawn using this SG2D.
534 */
535 if (info == null) {
536 info = new FontInfo();
537 }
538
539 float ptSize = font.getSize2D();
540 int txFontType;
541 AffineTransform devAt, textAt=null;
542 if (font.isTransformed()) {
543 textAt = font.getTransform();
544 textAt.scale(ptSize, ptSize);
545 txFontType = textAt.getType();
546 info.originX = (float)textAt.getTranslateX();
547 info.originY = (float)textAt.getTranslateY();
548 textAt.translate(-info.originX, -info.originY);
549 if (transformState >= TRANSFORM_TRANSLATESCALE) {
550 transform.getMatrix(info.devTx = new double[4]);
551 devAt = new AffineTransform(info.devTx);
552 textAt.preConcatenate(devAt);
553 } else {
554 info.devTx = IDENT_MATRIX;
555 devAt = IDENT_ATX;
556 }
557 textAt.getMatrix(info.glyphTx = new double[4]);
558 double shearx = textAt.getShearX();
559 double scaley = textAt.getScaleY();
560 if (shearx != 0) {
561 scaley = Math.sqrt(shearx * shearx + scaley * scaley);
562 }
563 info.pixelHeight = (int)(Math.abs(scaley)+0.5);
564 } else {
565 txFontType = AffineTransform.TYPE_IDENTITY;
566 info.originX = info.originY = 0;
567 if (transformState >= TRANSFORM_TRANSLATESCALE) {
568 transform.getMatrix(info.devTx = new double[4]);
569 devAt = new AffineTransform(info.devTx);
570 info.glyphTx = new double[4];
571 for (int i = 0; i < 4; i++) {
572 info.glyphTx[i] = info.devTx[i] * ptSize;
573 }
574 textAt = new AffineTransform(info.glyphTx);
575 double shearx = transform.getShearX();
576 double scaley = transform.getScaleY();
577 if (shearx != 0) {
578 scaley = Math.sqrt(shearx * shearx + scaley * scaley);
579 }
580 info.pixelHeight = (int)(Math.abs(scaley * ptSize)+0.5);
581 } else {
582 /* If the double represents a common integral, we
583 * may have pre-allocated objects.
584 * A "sparse" array be seems to be as fast as a switch
585 * even for 3 or 4 pt sizes, and is more flexible.
586 * This should perform comparably in single-threaded
587 * rendering to the old code which synchronized on the
588 * class and scale better on MP systems.
589 */
590 int pszInt = (int)ptSize;
591 if (ptSize == pszInt &&
592 pszInt >= MINALLOCATED && pszInt < TEXTARRSIZE) {
593 info.glyphTx = textTxArr[pszInt];
594 textAt = textAtArr[pszInt];
595 info.pixelHeight = pszInt;
596 } else {
597 info.pixelHeight = (int)(ptSize+0.5);
598 }
599 if (textAt == null) {
600 info.glyphTx = new double[] {ptSize, 0, 0, ptSize};
601 textAt = new AffineTransform(info.glyphTx);
602 }
603
604 info.devTx = IDENT_MATRIX;
605 devAt = IDENT_ATX;
606 }
607 }
608
609 info.font2D = FontUtilities.getFont2D(font);
610
611 int fmhint = fractionalMetricsHint;
612 if (fmhint == SunHints.INTVAL_FRACTIONALMETRICS_DEFAULT) {
613 fmhint = SunHints.INTVAL_FRACTIONALMETRICS_OFF;
614 }
615 info.lcdSubPixPos = false; // conditionally set true in LCD mode.
616
617 /* The text anti-aliasing hints that are set by the client need
618 * to be interpreted for the current state and stored in the
619 * FontInfo.aahint which is what will actually be used and
620 * will be one of OFF, ON, LCD_HRGB or LCD_VRGB.
621 * This is what pipe selection code should typically refer to, not
622 * textAntialiasHint. This means we are now evaluating the meaning
623 * of "default" here. Any pipe that really cares about that will
624 * also need to consult that variable.
625 * Otherwise these are being used only as args to getStrike,
626 * and are encapsulated in that object which is part of the
627 * FontInfo, so we do not need to store them directly as fields
628 * in the FontInfo object.
629 * That could change if FontInfo's were more selectively
630 * revalidated when graphics state changed. Presently this
631 * method re-evaluates all fields in the fontInfo.
632 * The strike doesn't need to know the RGB subpixel order. Just
633 * if its H or V orientation, so if an LCD option is specified we
634 * always pass in the RGB hint to the strike.
635 * frc is non-null only if this is a GlyphVector. For reasons
636 * which are probably a historical mistake the AA hint in a GV
637 * is honoured when we render, overriding the Graphics setting.
638 */
639 int aahint;
640 if (frc == null) {
641 aahint = textAntialiasHint;
642 } else {
643 aahint = ((SunHints.Value)frc.getAntiAliasingHint()).getIndex();
644 }
645 if (aahint == SunHints.INTVAL_TEXT_ANTIALIAS_DEFAULT) {
646 if (antialiasHint == SunHints.INTVAL_ANTIALIAS_ON) {
647 aahint = SunHints.INTVAL_TEXT_ANTIALIAS_ON;
648 } else {
649 aahint = SunHints.INTVAL_TEXT_ANTIALIAS_OFF;
650 }
651 } else {
652 /* If we are in checkFontInfo because a rendering hint has been
653 * set then all pipes are revalidated. But we can also
654 * be here because setFont() has been called when the 'gasp'
655 * hint is set, as then the font size determines the text pipe.
656 * See comments in SunGraphics2d.setFont(Font).
657 */
658 if (aahint == SunHints.INTVAL_TEXT_ANTIALIAS_GASP) {
659 if (info.font2D.useAAForPtSize(info.pixelHeight)) {
660 aahint = SunHints.INTVAL_TEXT_ANTIALIAS_ON;
661 } else {
662 aahint = SunHints.INTVAL_TEXT_ANTIALIAS_OFF;
663 }
664 } else if (aahint >= SunHints.INTVAL_TEXT_ANTIALIAS_LCD_HRGB) {
665 /* loops for default rendering modes are installed in the SG2D
666 * constructor. If there are none this will be null.
667 * Not all compositing modes update the render loops, so
668 * we also test that this is a mode we know should support
669 * this. One minor issue is that the loops aren't necessarily
670 * installed for a new rendering mode until after this
671 * method is called during pipeline validation. So it is
672 * theoretically possible that it was set to null for a
673 * compositing mode, the composite is then set back to Src,
674 * but the loop is still null when this is called and AA=ON
675 * is installed instead of an LCD mode.
676 * However this is done in the right order in SurfaceData.java
677 * so this is not likely to be a problem - but not
678 * guaranteed.
679 */
680 if (
681 !surfaceData.canRenderLCDText(this)
682 // loops.drawGlyphListLCDLoop == null ||
683 // compositeState > COMP_ISCOPY ||
684 // paintState > PAINT_ALPHACOLOR
685 ) {
686 aahint = SunHints.INTVAL_TEXT_ANTIALIAS_ON;
687 } else {
688 info.lcdRGBOrder = true;
689 /* Collapse these into just HRGB or VRGB.
690 * Pipe selection code needs only to test for these two.
691 * Since these both select the same pipe anyway its
692 * tempting to collapse into one value. But they are
693 * different strikes (glyph caches) so the distinction
694 * needs to be made for that purpose.
695 */
696 if (aahint == SunHints.INTVAL_TEXT_ANTIALIAS_LCD_HBGR) {
697 aahint = SunHints.INTVAL_TEXT_ANTIALIAS_LCD_HRGB;
698 info.lcdRGBOrder = false;
699 } else if
700 (aahint == SunHints.INTVAL_TEXT_ANTIALIAS_LCD_VBGR) {
701 aahint = SunHints.INTVAL_TEXT_ANTIALIAS_LCD_VRGB;
702 info.lcdRGBOrder = false;
703 }
704 /* Support subpixel positioning only for the case in
705 * which the horizontal resolution is increased
706 */
707 info.lcdSubPixPos =
708 fmhint == SunHints.INTVAL_FRACTIONALMETRICS_ON &&
709 aahint == SunHints.INTVAL_TEXT_ANTIALIAS_LCD_HRGB;
710 }
711 }
712 }
713 info.aaHint = aahint;
714 info.fontStrike = info.font2D.getStrike(font, devAt, textAt,
715 aahint, fmhint);
716 return info;
717 }
718
719 public static boolean isRotated(double [] mtx) {
720 if ((mtx[0] == mtx[3]) &&
721 (mtx[1] == 0.0) &&
722 (mtx[2] == 0.0) &&
723 (mtx[0] > 0.0))
724 {
725 return false;
726 }
727
728 return true;
729 }
730
731 public void setFont(Font font) {
732 /* replacing the reference equality test font != this.font with
733 * !font.equals(this.font) did not yield any measurable difference
734 * in testing, but there may be yet to be identified cases where it
735 * is beneficial.
736 */
737 if (font != null && font!=this.font/*!font.equals(this.font)*/) {
738 /* In the GASP AA case the textpipe depends on the glyph size
739 * as determined by graphics and font transforms as well as the
740 * font size, and information in the font. But we may invalidate
741 * the pipe only to find that it made no difference.
742 * Deferring pipe invalidation to checkFontInfo won't work because
743 * when called we may already be rendering to the wrong pipe.
744 * So, if the font is transformed, or the graphics has more than
745 * a simple scale, we'll take that as enough of a hint to
746 * revalidate everything. But if they aren't we will
747 * use the font's point size to query the gasp table and see if
748 * what it says matches what's currently being used, in which
749 * case there's no need to invalidate the textpipe.
750 * This should be sufficient for all typical uses cases.
751 */
752 if (textAntialiasHint == SunHints.INTVAL_TEXT_ANTIALIAS_GASP &&
753 textpipe != invalidpipe &&
754 (transformState > TRANSFORM_ANY_TRANSLATE ||
755 font.isTransformed() ||
756 fontInfo == null || // Precaution, if true shouldn't get here
757 (fontInfo.aaHint == SunHints.INTVAL_TEXT_ANTIALIAS_ON) !=
758 FontUtilities.getFont2D(font).
759 useAAForPtSize(font.getSize()))) {
760 textpipe = invalidpipe;
761 }
762 this.font = font;
763 this.fontMetrics = null;
764 this.validFontInfo = false;
765 }
766 }
767
768 public FontInfo getFontInfo() {
769 if (!validFontInfo) {
770 this.fontInfo = checkFontInfo(this.fontInfo, font, null);
771 validFontInfo = true;
772 }
773 return this.fontInfo;
774 }
775
776 /* Used by drawGlyphVector which specifies its own font. */
777 public FontInfo getGVFontInfo(Font font, FontRenderContext frc) {
778 if (glyphVectorFontInfo != null &&
779 glyphVectorFontInfo.font == font &&
780 glyphVectorFRC == frc) {
781 return glyphVectorFontInfo;
782 } else {
783 glyphVectorFRC = frc;
784 return glyphVectorFontInfo =
785 checkFontInfo(glyphVectorFontInfo, font, frc);
786 }
787 }
788
789 public FontMetrics getFontMetrics() {
790 if (this.fontMetrics != null) {
791 return this.fontMetrics;
792 }
793 /* NB the constructor and the setter disallow "font" being null */
794 return this.fontMetrics =
795 FontDesignMetrics.getMetrics(font, getFontRenderContext());
796 }
797
798 public FontMetrics getFontMetrics(Font font) {
799 if ((this.fontMetrics != null) && (font == this.font)) {
800 return this.fontMetrics;
801 }
802 FontMetrics fm =
803 FontDesignMetrics.getMetrics(font, getFontRenderContext());
804
805 if (this.font == font) {
806 this.fontMetrics = fm;
807 }
808 return fm;
809 }
810
811 /**
812 * Checks to see if a Path intersects the specified Rectangle in device
813 * space. The rendering attributes taken into account include the
814 * clip, transform, and stroke attributes.
815 * @param rect The area in device space to check for a hit.
816 * @param p The path to check for a hit.
817 * @param onStroke Flag to choose between testing the stroked or
818 * the filled path.
819 * @return True if there is a hit, false otherwise.
820 * @see #setStroke
821 * @see #fillPath
822 * @see #drawPath
823 * @see #transform
824 * @see #setTransform
825 * @see #clip
826 * @see #setClip
827 */
828 public boolean hit(Rectangle rect, Shape s, boolean onStroke) {
829 if (onStroke) {
830 s = stroke.createStrokedShape(s);
831 }
832
833 s = transformShape(s);
834 if ((constrainX|constrainY) != 0) {
835 rect = new Rectangle(rect);
836 rect.translate(constrainX, constrainY);
837 }
838
839 return s.intersects(rect);
840 }
841
842 /**
843 * Return the ColorModel associated with this Graphics2D.
844 */
845 public ColorModel getDeviceColorModel() {
846 return surfaceData.getColorModel();
847 }
848
849 /**
850 * Return the device configuration associated with this Graphics2D.
851 */
852 public GraphicsConfiguration getDeviceConfiguration() {
853 return surfaceData.getDeviceConfiguration();
854 }
855
856 /**
857 * Return the SurfaceData object assigned to manage the destination
858 * drawable surface of this Graphics2D.
859 */
860 public final SurfaceData getSurfaceData() {
861 return surfaceData;
862 }
863
864 /**
865 * Sets the Composite in the current graphics state. Composite is used
866 * in all drawing methods such as drawImage, drawString, drawPath,
867 * and fillPath. It specifies how new pixels are to be combined with
868 * the existing pixels on the graphics device in the rendering process.
869 * @param comp The Composite object to be used for drawing.
870 * @see java.awt.Graphics#setXORMode
871 * @see java.awt.Graphics#setPaintMode
872 * @see AlphaComposite
873 */
874 public void setComposite(Composite comp) {
875 if (composite == comp) {
876 return;
877 }
878 int newCompState;
879 CompositeType newCompType;
880 if (comp instanceof AlphaComposite) {
881 AlphaComposite alphacomp = (AlphaComposite) comp;
882 newCompType = CompositeType.forAlphaComposite(alphacomp);
883 if (newCompType == CompositeType.SrcOverNoEa) {
884 if (paintState == PAINT_OPAQUECOLOR ||
885 (paintState > PAINT_ALPHACOLOR &&
886 paint.getTransparency() == Transparency.OPAQUE))
887 {
888 newCompState = COMP_ISCOPY;
889 } else {
890 newCompState = COMP_ALPHA;
891 }
892 } else if (newCompType == CompositeType.SrcNoEa ||
893 newCompType == CompositeType.Src ||
894 newCompType == CompositeType.Clear)
895 {
896 newCompState = COMP_ISCOPY;
897 } else if (surfaceData.getTransparency() == Transparency.OPAQUE &&
898 newCompType == CompositeType.SrcIn)
899 {
900 newCompState = COMP_ISCOPY;
901 } else {
902 newCompState = COMP_ALPHA;
903 }
904 } else if (comp instanceof XORComposite) {
905 newCompState = COMP_XOR;
906 newCompType = CompositeType.Xor;
907 } else if (comp == null) {
908 throw new IllegalArgumentException("null Composite");
909 } else {
910 surfaceData.checkCustomComposite();
911 newCompState = COMP_CUSTOM;
912 newCompType = CompositeType.General;
913 }
914 if (compositeState != newCompState ||
915 imageComp != newCompType)
916 {
917 compositeState = newCompState;
918 imageComp = newCompType;
919 invalidatePipe();
920 validFontInfo = false;
921 }
922 composite = comp;
923 if (paintState <= PAINT_ALPHACOLOR) {
924 validateColor();
925 }
926 }
927
928 /**
929 * Sets the Paint in the current graphics state.
930 * @param paint The Paint object to be used to generate color in
931 * the rendering process.
932 * @see java.awt.Graphics#setColor
933 * @see GradientPaint
934 * @see TexturePaint
935 */
936 public void setPaint(Paint paint) {
937 if (paint instanceof Color) {
938 setColor((Color) paint);
939 return;
940 }
941 if (paint == null || this.paint == paint) {
942 return;
943 }
944 this.paint = paint;
945 if (imageComp == CompositeType.SrcOverNoEa) {
946 // special case where compState depends on opacity of paint
947 if (paint.getTransparency() == Transparency.OPAQUE) {
948 if (compositeState != COMP_ISCOPY) {
949 compositeState = COMP_ISCOPY;
950 }
951 } else {
952 if (compositeState == COMP_ISCOPY) {
953 compositeState = COMP_ALPHA;
954 }
955 }
956 }
957 Class<? extends Paint> paintClass = paint.getClass();
958 if (paintClass == GradientPaint.class) {
959 paintState = PAINT_GRADIENT;
960 } else if (paintClass == LinearGradientPaint.class) {
961 paintState = PAINT_LIN_GRADIENT;
962 } else if (paintClass == RadialGradientPaint.class) {
963 paintState = PAINT_RAD_GRADIENT;
964 } else if (paintClass == TexturePaint.class) {
965 paintState = PAINT_TEXTURE;
966 } else {
967 paintState = PAINT_CUSTOM;
968 }
969 validFontInfo = false;
970 invalidatePipe();
971 }
972
973 static final int NON_UNIFORM_SCALE_MASK =
974 (AffineTransform.TYPE_GENERAL_TRANSFORM |
975 AffineTransform.TYPE_GENERAL_SCALE);
976 public static final double MinPenSizeAA =
977 sun.java2d.pipe.RenderingEngine.getInstance().getMinimumAAPenSize();
978 public static final double MinPenSizeAASquared =
979 (MinPenSizeAA * MinPenSizeAA);
980 // Since inaccuracies in the trig package can cause us to
981 // calculated a rotated pen width of just slightly greater
982 // than 1.0, we add a fudge factor to our comparison value
983 // here so that we do not misclassify single width lines as
984 // wide lines under certain rotations.
985 public static final double MinPenSizeSquared = 1.000000001;
986
987 private void validateBasicStroke(BasicStroke bs) {
988 boolean aa = (antialiasHint == SunHints.INTVAL_ANTIALIAS_ON);
989 if (transformState < TRANSFORM_TRANSLATESCALE) {
990 if (aa) {
991 if (bs.getLineWidth() <= MinPenSizeAA) {
992 if (bs.getDashArray() == null) {
993 strokeState = STROKE_THIN;
994 } else {
995 strokeState = STROKE_THINDASHED;
996 }
997 } else {
998 strokeState = STROKE_WIDE;
999 }
1000 } else {
1001 if (bs == defaultStroke) {
1002 strokeState = STROKE_THIN;
1003 } else if (bs.getLineWidth() <= 1.0f) {
1004 if (bs.getDashArray() == null) {
1005 strokeState = STROKE_THIN;
1006 } else {
1007 strokeState = STROKE_THINDASHED;
1008 }
1009 } else {
1010 strokeState = STROKE_WIDE;
1011 }
1012 }
1013 } else {
1014 double widthsquared;
1015 if ((transform.getType() & NON_UNIFORM_SCALE_MASK) == 0) {
1016 /* sqrt omitted, compare to squared limits below. */
1017 widthsquared = Math.abs(transform.getDeterminant());
1018 } else {
1019 /* First calculate the "maximum scale" of this transform. */
1020 double A = transform.getScaleX(); // m00
1021 double C = transform.getShearX(); // m01
1022 double B = transform.getShearY(); // m10
1023 double D = transform.getScaleY(); // m11
1024
1025 /*
1026 * Given a 2 x 2 affine matrix [ A B ] such that
1027 * [ C D ]
1028 * v' = [x' y'] = [Ax + Cy, Bx + Dy], we want to
1029 * find the maximum magnitude (norm) of the vector v'
1030 * with the constraint (x^2 + y^2 = 1).
1031 * The equation to maximize is
1032 * |v'| = sqrt((Ax+Cy)^2+(Bx+Dy)^2)
1033 * or |v'| = sqrt((AA+BB)x^2 + 2(AC+BD)xy + (CC+DD)y^2).
1034 * Since sqrt is monotonic we can maximize |v'|^2
1035 * instead and plug in the substitution y = sqrt(1 - x^2).
1036 * Trigonometric equalities can then be used to get
1037 * rid of most of the sqrt terms.
1038 */
1039 double EA = A*A + B*B; // x^2 coefficient
1040 double EB = 2*(A*C + B*D); // xy coefficient
1041 double EC = C*C + D*D; // y^2 coefficient
1042
1043 /*
1044 * There is a lot of calculus omitted here.
1045 *
1046 * Conceptually, in the interests of understanding the
1047 * terms that the calculus produced we can consider
1048 * that EA and EC end up providing the lengths along
1049 * the major axes and the hypot term ends up being an
1050 * adjustment for the additional length along the off-axis
1051 * angle of rotated or sheared ellipses as well as an
1052 * adjustment for the fact that the equation below
1053 * averages the two major axis lengths. (Notice that
1054 * the hypot term contains a part which resolves to the
1055 * difference of these two axis lengths in the absence
1056 * of rotation.)
1057 *
1058 * In the calculus, the ratio of the EB and (EA-EC) terms
1059 * ends up being the tangent of 2*theta where theta is
1060 * the angle that the long axis of the ellipse makes
1061 * with the horizontal axis. Thus, this equation is
1062 * calculating the length of the hypotenuse of a triangle
1063 * along that axis.
1064 */
1065 double hypot = Math.sqrt(EB*EB + (EA-EC)*(EA-EC));
1066
1067 /* sqrt omitted, compare to squared limits below. */
1068 widthsquared = ((EA + EC + hypot)/2.0);
1069 }
1070 if (bs != defaultStroke) {
1071 widthsquared *= bs.getLineWidth() * bs.getLineWidth();
1072 }
1073 if (widthsquared <=
1074 (aa ? MinPenSizeAASquared : MinPenSizeSquared))
1075 {
1076 if (bs.getDashArray() == null) {
1077 strokeState = STROKE_THIN;
1078 } else {
1079 strokeState = STROKE_THINDASHED;
1080 }
1081 } else {
1082 strokeState = STROKE_WIDE;
1083 }
1084 }
1085 }
1086
1087 /*
1088 * Sets the Stroke in the current graphics state.
1089 * @param s The Stroke object to be used to stroke a Path in
1090 * the rendering process.
1091 * @see BasicStroke
1092 */
1093 public void setStroke(Stroke s) {
1094 if (s == null) {
1095 throw new IllegalArgumentException("null Stroke");
1096 }
1097 int saveStrokeState = strokeState;
1098 stroke = s;
1099 if (s instanceof BasicStroke) {
1100 validateBasicStroke((BasicStroke) s);
1101 } else {
1102 strokeState = STROKE_CUSTOM;
1103 }
1104 if (strokeState != saveStrokeState) {
1105 invalidatePipe();
1106 }
1107 }
1108
1109 /**
1110 * Sets the preferences for the rendering algorithms.
1111 * Hint categories include controls for rendering quality and
1112 * overall time/quality trade-off in the rendering process.
1113 * @param hintKey The key of hint to be set. The strings are
1114 * defined in the RenderingHints class.
1115 * @param hintValue The value indicating preferences for the specified
1116 * hint category. These strings are defined in the RenderingHints
1117 * class.
1118 * @see RenderingHints
1119 */
1120 public void setRenderingHint(Key hintKey, Object hintValue) {
1121 // If we recognize the key, we must recognize the value
1122 // otherwise throw an IllegalArgumentException
1123 // and do not change the Hints object
1124 // If we do not recognize the key, just pass it through
1125 // to the Hints object untouched
1126 if (!hintKey.isCompatibleValue(hintValue)) {
1127 throw new IllegalArgumentException
1128 (hintValue+" is not compatible with "+hintKey);
1129 }
1130 if (hintKey instanceof SunHints.Key) {
1131 boolean stateChanged;
1132 boolean textStateChanged = false;
1133 boolean recognized = true;
1134 SunHints.Key sunKey = (SunHints.Key) hintKey;
1135 int newHint;
1136 if (sunKey == SunHints.KEY_TEXT_ANTIALIAS_LCD_CONTRAST) {
1137 newHint = ((Integer)hintValue).intValue();
1138 } else {
1139 newHint = ((SunHints.Value) hintValue).getIndex();
1140 }
1141 switch (sunKey.getIndex()) {
1142 case SunHints.INTKEY_RENDERING:
1143 stateChanged = (renderHint != newHint);
1144 if (stateChanged) {
1145 renderHint = newHint;
1146 if (interpolationHint == -1) {
1147 interpolationType =
1148 (newHint == SunHints.INTVAL_RENDER_QUALITY
1149 ? AffineTransformOp.TYPE_BILINEAR
1150 : AffineTransformOp.TYPE_NEAREST_NEIGHBOR);
1151 }
1152 }
1153 break;
1154 case SunHints.INTKEY_ANTIALIASING:
1155 stateChanged = (antialiasHint != newHint);
1156 antialiasHint = newHint;
1157 if (stateChanged) {
1158 textStateChanged =
1159 (textAntialiasHint ==
1160 SunHints.INTVAL_TEXT_ANTIALIAS_DEFAULT);
1161 if (strokeState != STROKE_CUSTOM) {
1162 validateBasicStroke((BasicStroke) stroke);
1163 }
1164 }
1165 break;
1166 case SunHints.INTKEY_TEXT_ANTIALIASING:
1167 stateChanged = (textAntialiasHint != newHint);
1168 textStateChanged = stateChanged;
1169 textAntialiasHint = newHint;
1170 break;
1171 case SunHints.INTKEY_FRACTIONALMETRICS:
1172 stateChanged = (fractionalMetricsHint != newHint);
1173 textStateChanged = stateChanged;
1174 fractionalMetricsHint = newHint;
1175 break;
1176 case SunHints.INTKEY_AATEXT_LCD_CONTRAST:
1177 stateChanged = false;
1178 /* Already have validated it is an int 100 <= newHint <= 250 */
1179 lcdTextContrast = newHint;
1180 break;
1181 case SunHints.INTKEY_INTERPOLATION:
1182 interpolationHint = newHint;
1183 switch (newHint) {
1184 case SunHints.INTVAL_INTERPOLATION_BICUBIC:
1185 newHint = AffineTransformOp.TYPE_BICUBIC;
1186 break;
1187 case SunHints.INTVAL_INTERPOLATION_BILINEAR:
1188 newHint = AffineTransformOp.TYPE_BILINEAR;
1189 break;
1190 default:
1191 case SunHints.INTVAL_INTERPOLATION_NEAREST_NEIGHBOR:
1192 newHint = AffineTransformOp.TYPE_NEAREST_NEIGHBOR;
1193 break;
1194 }
1195 stateChanged = (interpolationType != newHint);
1196 interpolationType = newHint;
1197 break;
1198 case SunHints.INTKEY_STROKE_CONTROL:
1199 stateChanged = (strokeHint != newHint);
1200 strokeHint = newHint;
1201 break;
1202 default:
1203 recognized = false;
1204 stateChanged = false;
1205 break;
1206 }
1207 if (recognized) {
1208 if (stateChanged) {
1209 invalidatePipe();
1210 if (textStateChanged) {
1211 fontMetrics = null;
1212 this.cachedFRC = null;
1213 validFontInfo = false;
1214 this.glyphVectorFontInfo = null;
1215 }
1216 }
1217 if (hints != null) {
1218 hints.put(hintKey, hintValue);
1219 }
1220 return;
1221 }
1222 }
1223 // Nothing we recognize so none of "our state" has changed
1224 if (hints == null) {
1225 hints = makeHints(null);
1226 }
1227 hints.put(hintKey, hintValue);
1228 }
1229
1230
1231 /**
1232 * Returns the preferences for the rendering algorithms.
1233 * @param hintCategory The category of hint to be set. The strings
1234 * are defined in the RenderingHints class.
1235 * @return The preferences for rendering algorithms. The strings
1236 * are defined in the RenderingHints class.
1237 * @see RenderingHints
1238 */
1239 public Object getRenderingHint(Key hintKey) {
1240 if (hints != null) {
1241 return hints.get(hintKey);
1242 }
1243 if (!(hintKey instanceof SunHints.Key)) {
1244 return null;
1245 }
1246 int keyindex = ((SunHints.Key)hintKey).getIndex();
1247 switch (keyindex) {
1248 case SunHints.INTKEY_RENDERING:
1249 return SunHints.Value.get(SunHints.INTKEY_RENDERING,
1250 renderHint);
1251 case SunHints.INTKEY_ANTIALIASING:
1252 return SunHints.Value.get(SunHints.INTKEY_ANTIALIASING,
1253 antialiasHint);
1254 case SunHints.INTKEY_TEXT_ANTIALIASING:
1255 return SunHints.Value.get(SunHints.INTKEY_TEXT_ANTIALIASING,
1256 textAntialiasHint);
1257 case SunHints.INTKEY_FRACTIONALMETRICS:
1258 return SunHints.Value.get(SunHints.INTKEY_FRACTIONALMETRICS,
1259 fractionalMetricsHint);
1260 case SunHints.INTKEY_AATEXT_LCD_CONTRAST:
1261 return new Integer(lcdTextContrast);
1262 case SunHints.INTKEY_INTERPOLATION:
1263 switch (interpolationHint) {
1264 case SunHints.INTVAL_INTERPOLATION_NEAREST_NEIGHBOR:
1265 return SunHints.VALUE_INTERPOLATION_NEAREST_NEIGHBOR;
1266 case SunHints.INTVAL_INTERPOLATION_BILINEAR:
1267 return SunHints.VALUE_INTERPOLATION_BILINEAR;
1268 case SunHints.INTVAL_INTERPOLATION_BICUBIC:
1269 return SunHints.VALUE_INTERPOLATION_BICUBIC;
1270 }
1271 return null;
1272 case SunHints.INTKEY_STROKE_CONTROL:
1273 return SunHints.Value.get(SunHints.INTKEY_STROKE_CONTROL,
1274 strokeHint);
1275 }
1276 return null;
1277 }
1278
1279 /**
1280 * Sets the preferences for the rendering algorithms.
1281 * Hint categories include controls for rendering quality and
1282 * overall time/quality trade-off in the rendering process.
1283 * @param hints The rendering hints to be set
1284 * @see RenderingHints
1285 */
1286 public void setRenderingHints(Map<?,?> hints) {
1287 this.hints = null;
1288 renderHint = SunHints.INTVAL_RENDER_DEFAULT;
1289 antialiasHint = SunHints.INTVAL_ANTIALIAS_OFF;
1290 textAntialiasHint = SunHints.INTVAL_TEXT_ANTIALIAS_DEFAULT;
1291 fractionalMetricsHint = SunHints.INTVAL_FRACTIONALMETRICS_OFF;
1292 lcdTextContrast = lcdTextContrastDefaultValue;
1293 interpolationHint = -1;
1294 interpolationType = AffineTransformOp.TYPE_NEAREST_NEIGHBOR;
1295 boolean customHintPresent = false;
1296 Iterator<?> iter = hints.keySet().iterator();
1297 while (iter.hasNext()) {
1298 Object key = iter.next();
1299 if (key == SunHints.KEY_RENDERING ||
1300 key == SunHints.KEY_ANTIALIASING ||
1301 key == SunHints.KEY_TEXT_ANTIALIASING ||
1302 key == SunHints.KEY_FRACTIONALMETRICS ||
1303 key == SunHints.KEY_TEXT_ANTIALIAS_LCD_CONTRAST ||
1304 key == SunHints.KEY_STROKE_CONTROL ||
1305 key == SunHints.KEY_INTERPOLATION)
1306 {
1307 setRenderingHint((Key) key, hints.get(key));
1308 } else {
1309 customHintPresent = true;
1310 }
1311 }
1312 if (customHintPresent) {
1313 this.hints = makeHints(hints);
1314 }
1315 invalidatePipe();
1316 }
1317
1318 /**
1319 * Adds a number of preferences for the rendering algorithms.
1320 * Hint categories include controls for rendering quality and
1321 * overall time/quality trade-off in the rendering process.
1322 * @param hints The rendering hints to be set
1323 * @see RenderingHints
1324 */
1325 public void addRenderingHints(Map<?,?> hints) {
1326 boolean customHintPresent = false;
1327 Iterator<?> iter = hints.keySet().iterator();
1328 while (iter.hasNext()) {
1329 Object key = iter.next();
1330 if (key == SunHints.KEY_RENDERING ||
1331 key == SunHints.KEY_ANTIALIASING ||
1332 key == SunHints.KEY_TEXT_ANTIALIASING ||
1333 key == SunHints.KEY_FRACTIONALMETRICS ||
1334 key == SunHints.KEY_TEXT_ANTIALIAS_LCD_CONTRAST ||
1335 key == SunHints.KEY_STROKE_CONTROL ||
1336 key == SunHints.KEY_INTERPOLATION)
1337 {
1338 setRenderingHint((Key) key, hints.get(key));
1339 } else {
1340 customHintPresent = true;
1341 }
1342 }
1343 if (customHintPresent) {
1344 if (this.hints == null) {
1345 this.hints = makeHints(hints);
1346 } else {
1347 this.hints.putAll(hints);
1348 }
1349 }
1350 }
1351
1352 /**
1353 * Gets the preferences for the rendering algorithms.
1354 * Hint categories include controls for rendering quality and
1355 * overall time/quality trade-off in the rendering process.
1356 * @see RenderingHints
1357 */
1358 public RenderingHints getRenderingHints() {
1359 if (hints == null) {
1360 return makeHints(null);
1361 } else {
1362 return (RenderingHints) hints.clone();
1363 }
1364 }
1365
1366 RenderingHints makeHints(Map hints) {
1367 RenderingHints model = new RenderingHints(hints);
1368 model.put(SunHints.KEY_RENDERING,
1369 SunHints.Value.get(SunHints.INTKEY_RENDERING,
1370 renderHint));
1371 model.put(SunHints.KEY_ANTIALIASING,
1372 SunHints.Value.get(SunHints.INTKEY_ANTIALIASING,
1373 antialiasHint));
1374 model.put(SunHints.KEY_TEXT_ANTIALIASING,
1375 SunHints.Value.get(SunHints.INTKEY_TEXT_ANTIALIASING,
1376 textAntialiasHint));
1377 model.put(SunHints.KEY_FRACTIONALMETRICS,
1378 SunHints.Value.get(SunHints.INTKEY_FRACTIONALMETRICS,
1379 fractionalMetricsHint));
1380 model.put(SunHints.KEY_TEXT_ANTIALIAS_LCD_CONTRAST,
1381 Integer.valueOf(lcdTextContrast));
1382 Object value;
1383 switch (interpolationHint) {
1384 case SunHints.INTVAL_INTERPOLATION_NEAREST_NEIGHBOR:
1385 value = SunHints.VALUE_INTERPOLATION_NEAREST_NEIGHBOR;
1386 break;
1387 case SunHints.INTVAL_INTERPOLATION_BILINEAR:
1388 value = SunHints.VALUE_INTERPOLATION_BILINEAR;
1389 break;
1390 case SunHints.INTVAL_INTERPOLATION_BICUBIC:
1391 value = SunHints.VALUE_INTERPOLATION_BICUBIC;
1392 break;
1393 default:
1394 value = null;
1395 break;
1396 }
1397 if (value != null) {
1398 model.put(SunHints.KEY_INTERPOLATION, value);
1399 }
1400 model.put(SunHints.KEY_STROKE_CONTROL,
1401 SunHints.Value.get(SunHints.INTKEY_STROKE_CONTROL,
1402 strokeHint));
1403 return model;
1404 }
1405
1406 /**
1407 * Concatenates the current transform of this Graphics2D with a
1408 * translation transformation.
1409 * This is equivalent to calling transform(T), where T is an
1410 * AffineTransform represented by the following matrix:
1411 * <pre>
1412 * [ 1 0 tx ]
1413 * [ 0 1 ty ]
1414 * [ 0 0 1 ]
1415 * </pre>
1416 */
1417 public void translate(double tx, double ty) {
1418 transform.translate(tx, ty);
1419 invalidateTransform();
1420 }
1421
1422 /**
1423 * Concatenates the current transform of this Graphics2D with a
1424 * rotation transformation.
1425 * This is equivalent to calling transform(R), where R is an
1426 * AffineTransform represented by the following matrix:
1427 * <pre>
1428 * [ cos(theta) -sin(theta) 0 ]
1429 * [ sin(theta) cos(theta) 0 ]
1430 * [ 0 0 1 ]
1431 * </pre>
1432 * Rotating with a positive angle theta rotates points on the positive
1433 * x axis toward the positive y axis.
1434 * @param theta The angle of rotation in radians.
1435 */
1436 public void rotate(double theta) {
1437 transform.rotate(theta);
1438 invalidateTransform();
1439 }
1440
1441 /**
1442 * Concatenates the current transform of this Graphics2D with a
1443 * translated rotation transformation.
1444 * This is equivalent to the following sequence of calls:
1445 * <pre>
1446 * translate(x, y);
1447 * rotate(theta);
1448 * translate(-x, -y);
1449 * </pre>
1450 * Rotating with a positive angle theta rotates points on the positive
1451 * x axis toward the positive y axis.
1452 * @param theta The angle of rotation in radians.
1453 * @param x The x coordinate of the origin of the rotation
1454 * @param y The x coordinate of the origin of the rotation
1455 */
1456 public void rotate(double theta, double x, double y) {
1457 transform.rotate(theta, x, y);
1458 invalidateTransform();
1459 }
1460
1461 /**
1462 * Concatenates the current transform of this Graphics2D with a
1463 * scaling transformation.
1464 * This is equivalent to calling transform(S), where S is an
1465 * AffineTransform represented by the following matrix:
1466 * <pre>
1467 * [ sx 0 0 ]
1468 * [ 0 sy 0 ]
1469 * [ 0 0 1 ]
1470 * </pre>
1471 */
1472 public void scale(double sx, double sy) {
1473 transform.scale(sx, sy);
1474 invalidateTransform();
1475 }
1476
1477 /**
1478 * Concatenates the current transform of this Graphics2D with a
1479 * shearing transformation.
1480 * This is equivalent to calling transform(SH), where SH is an
1481 * AffineTransform represented by the following matrix:
1482 * <pre>
1483 * [ 1 shx 0 ]
1484 * [ shy 1 0 ]
1485 * [ 0 0 1 ]
1486 * </pre>
1487 * @param shx The factor by which coordinates are shifted towards the
1488 * positive X axis direction according to their Y coordinate
1489 * @param shy The factor by which coordinates are shifted towards the
1490 * positive Y axis direction according to their X coordinate
1491 */
1492 public void shear(double shx, double shy) {
1493 transform.shear(shx, shy);
1494 invalidateTransform();
1495 }
1496
1497 /**
1498 * Composes a Transform object with the transform in this
1499 * Graphics2D according to the rule last-specified-first-applied.
1500 * If the currrent transform is Cx, the result of composition
1501 * with Tx is a new transform Cx'. Cx' becomes the current
1502 * transform for this Graphics2D.
1503 * Transforming a point p by the updated transform Cx' is
1504 * equivalent to first transforming p by Tx and then transforming
1505 * the result by the original transform Cx. In other words,
1506 * Cx'(p) = Cx(Tx(p)).
1507 * A copy of the Tx is made, if necessary, so further
1508 * modifications to Tx do not affect rendering.
1509 * @param Tx The Transform object to be composed with the current
1510 * transform.
1511 * @see #setTransform
1512 * @see AffineTransform
1513 */
1514 public void transform(AffineTransform xform) {
1515 this.transform.concatenate(xform);
1516 invalidateTransform();
1517 }
1518
1519 /**
1520 * Translate
1521 */
1522 public void translate(int x, int y) {
1523 transform.translate(x, y);
1524 if (transformState <= TRANSFORM_INT_TRANSLATE) {
1525 transX += x;
1526 transY += y;
1527 transformState = (((transX | transY) == 0) ?
1528 TRANSFORM_ISIDENT : TRANSFORM_INT_TRANSLATE);
1529 } else {
1530 invalidateTransform();
1531 }
1532 }
1533
1534 /**
1535 * Sets the Transform in the current graphics state.
1536 * @param Tx The Transform object to be used in the rendering process.
1537 * @see #transform
1538 * @see TransformChain
1539 * @see AffineTransform
1540 */
1541 public void setTransform(AffineTransform Tx) {
1542 if ((constrainX|constrainY) == 0) {
1543 transform.setTransform(Tx);
1544 } else {
1545 transform.setToTranslation(constrainX, constrainY);
1546 transform.concatenate(Tx);
1547 }
1548 invalidateTransform();
1549 }
1550
1551 protected void invalidateTransform() {
1552 int type = transform.getType();
1553 int origTransformState = transformState;
1554 if (type == AffineTransform.TYPE_IDENTITY) {
1555 transformState = TRANSFORM_ISIDENT;
1556 transX = transY = 0;
1557 } else if (type == AffineTransform.TYPE_TRANSLATION) {
1558 double dtx = transform.getTranslateX();
1559 double dty = transform.getTranslateY();
1560 transX = (int) Math.floor(dtx + 0.5);
1561 transY = (int) Math.floor(dty + 0.5);
1562 if (dtx == transX && dty == transY) {
1563 transformState = TRANSFORM_INT_TRANSLATE;
1564 } else {
1565 transformState = TRANSFORM_ANY_TRANSLATE;
1566 }
1567 } else if ((type & (AffineTransform.TYPE_FLIP |
1568 AffineTransform.TYPE_MASK_ROTATION |
1569 AffineTransform.TYPE_GENERAL_TRANSFORM)) == 0)
1570 {
1571 transformState = TRANSFORM_TRANSLATESCALE;
1572 transX = transY = 0;
1573 } else {
1574 transformState = TRANSFORM_GENERIC;
1575 transX = transY = 0;
1576 }
1577
1578 if (transformState >= TRANSFORM_TRANSLATESCALE ||
1579 origTransformState >= TRANSFORM_TRANSLATESCALE)
1580 {
1581 /* Its only in this case that the previous or current transform
1582 * was more than a translate that font info is invalidated
1583 */
1584 cachedFRC = null;
1585 this.validFontInfo = false;
1586 this.fontMetrics = null;
1587 this.glyphVectorFontInfo = null;
1588
1589 if (transformState != origTransformState) {
1590 invalidatePipe();
1591 }
1592 }
1593 if (strokeState != STROKE_CUSTOM) {
1594 validateBasicStroke((BasicStroke) stroke);
1595 }
1596 }
1597
1598 /**
1599 * Returns the current Transform in the Graphics2D state.
1600 * @see #transform
1601 * @see #setTransform
1602 */
1603 public AffineTransform getTransform() {
1604 if ((constrainX|constrainY) == 0) {
1605 return new AffineTransform(transform);
1606 }
1607 AffineTransform tx =
1608 AffineTransform.getTranslateInstance(-constrainX, -constrainY);
1609 tx.concatenate(transform);
1610 return tx;
1611 }
1612
1613 /**
1614 * Returns the current Transform ignoring the "constrain"
1615 * rectangle.
1616 */
1617 public AffineTransform cloneTransform() {
1618 return new AffineTransform(transform);
1619 }
1620
1621 /**
1622 * Returns the current Paint in the Graphics2D state.
1623 * @see #setPaint
1624 * @see java.awt.Graphics#setColor
1625 */
1626 public Paint getPaint() {
1627 return paint;
1628 }
1629
1630 /**
1631 * Returns the current Composite in the Graphics2D state.
1632 * @see #setComposite
1633 */
1634 public Composite getComposite() {
1635 return composite;
1636 }
1637
1638 public Color getColor() {
1639 return foregroundColor;
1640 }
1641
1642 /*
1643 * Validate the eargb and pixel fields against the current color.
1644 *
1645 * The eargb field must take into account the extraAlpha
1646 * value of an AlphaComposite. It may also take into account
1647 * the Fsrc Porter-Duff blending function if such a function is
1648 * a constant (see handling of Clear mode below). For instance,
1649 * by factoring in the (Fsrc == 0) state of the Clear mode we can
1650 * use a SrcNoEa loop just as easily as a general Alpha loop
1651 * since the math will be the same in both cases.
1652 *
1653 * The pixel field will always be the best pixel data choice for
1654 * the final result of all calculations applied to the eargb field.
1655 *
1656 * Note that this method is only necessary under the following
1657 * conditions:
1658 * (paintState <= PAINT_ALPHA_COLOR &&
1659 * compositeState <= COMP_CUSTOM)
1660 * though nothing bad will happen if it is run in other states.
1661 */
1662 final void validateColor() {
1663 int eargb;
1664 if (imageComp == CompositeType.Clear) {
1665 eargb = 0;
1666 } else {
1667 eargb = foregroundColor.getRGB();
1668 if (compositeState <= COMP_ALPHA &&
1669 imageComp != CompositeType.SrcNoEa &&
1670 imageComp != CompositeType.SrcOverNoEa)
1671 {
1672 AlphaComposite alphacomp = (AlphaComposite) composite;
1673 int a = Math.round(alphacomp.getAlpha() * (eargb >>> 24));
1674 eargb = (eargb & 0x00ffffff) | (a << 24);
1675 }
1676 }
1677 this.eargb = eargb;
1678 this.pixel = surfaceData.pixelFor(eargb);
1679 }
1680
1681 public void setColor(Color color) {
1682 if (color == null || color == paint) {
1683 return;
1684 }
1685 this.paint = foregroundColor = color;
1686 validateColor();
1687 if ((eargb >> 24) == -1) {
1688 if (paintState == PAINT_OPAQUECOLOR) {
1689 return;
1690 }
1691 paintState = PAINT_OPAQUECOLOR;
1692 if (imageComp == CompositeType.SrcOverNoEa) {
1693 // special case where compState depends on opacity of paint
1694 compositeState = COMP_ISCOPY;
1695 }
1696 } else {
1697 if (paintState == PAINT_ALPHACOLOR) {
1698 return;
1699 }
1700 paintState = PAINT_ALPHACOLOR;
1701 if (imageComp == CompositeType.SrcOverNoEa) {
1702 // special case where compState depends on opacity of paint
1703 compositeState = COMP_ALPHA;
1704 }
1705 }
1706 validFontInfo = false;
1707 invalidatePipe();
1708 }
1709
1710 /**
1711 * Sets the background color in this context used for clearing a region.
1712 * When Graphics2D is constructed for a component, the backgroung color is
1713 * inherited from the component. Setting the background color in the
1714 * Graphics2D context only affects the subsequent clearRect() calls and
1715 * not the background color of the component. To change the background
1716 * of the component, use appropriate methods of the component.
1717 * @param color The background color that should be used in
1718 * subsequent calls to clearRect().
1719 * @see getBackground
1720 * @see Graphics.clearRect()
1721 */
1722 public void setBackground(Color color) {
1723 backgroundColor = color;
1724 }
1725
1726 /**
1727 * Returns the background color used for clearing a region.
1728 * @see setBackground
1729 */
1730 public Color getBackground() {
1731 return backgroundColor;
1732 }
1733
1734 /**
1735 * Returns the current Stroke in the Graphics2D state.
1736 * @see setStroke
1737 */
1738 public Stroke getStroke() {
1739 return stroke;
1740 }
1741
1742 public Rectangle getClipBounds() {
1743 Rectangle r;
1744 if (clipState == CLIP_DEVICE) {
1745 r = null;
1746 } else if (transformState <= TRANSFORM_INT_TRANSLATE) {
1747 if (usrClip instanceof Rectangle) {
1748 r = new Rectangle((Rectangle) usrClip);
1749 } else {
1750 r = usrClip.getBounds();
1751 }
1752 r.translate(-transX, -transY);
1753 } else {
1754 r = getClip().getBounds();
1755 }
1756 return r;
1757 }
1758
1759 public Rectangle getClipBounds(Rectangle r) {
1760 if (clipState != CLIP_DEVICE) {
1761 if (transformState <= TRANSFORM_INT_TRANSLATE) {
1762 if (usrClip instanceof Rectangle) {
1763 r.setBounds((Rectangle) usrClip);
1764 } else {
1765 r.setBounds(usrClip.getBounds());
1766 }
1767 r.translate(-transX, -transY);
1768 } else {
1769 r.setBounds(getClip().getBounds());
1770 }
1771 } else if (r == null) {
1772 throw new NullPointerException("null rectangle parameter");
1773 }
1774 return r;
1775 }
1776
1777 public boolean hitClip(int x, int y, int width, int height) {
1778 if (width <= 0 || height <= 0) {
1779 return false;
1780 }
1781 if (transformState > TRANSFORM_INT_TRANSLATE) {
1782 // Note: Technically the most accurate test would be to
1783 // raster scan the parallelogram of the transformed rectangle
1784 // and do a span for span hit test against the clip, but for
1785 // speed we approximate the test with a bounding box of the
1786 // transformed rectangle. The cost of rasterizing the
1787 // transformed rectangle is probably high enough that it is
1788 // not worth doing so to save the caller from having to call
1789 // a rendering method where we will end up discovering the
1790 // same answer in about the same amount of time anyway.
1791 // This logic breaks down if this hit test is being performed
1792 // on the bounds of a group of shapes in which case it might
1793 // be beneficial to be a little more accurate to avoid lots
1794 // of subsequent rendering calls. In either case, this relaxed
1795 // test should not be significantly less accurate than the
1796 // optimal test for most transforms and so the conservative
1797 // answer should not cause too much extra work.
1798
1799 double d[] = {
1800 x, y,
1801 x+width, y,
1802 x, y+height,
1803 x+width, y+height
1804 };
1805 transform.transform(d, 0, d, 0, 4);
1806 x = (int) Math.floor(Math.min(Math.min(d[0], d[2]),
1807 Math.min(d[4], d[6])));
1808 y = (int) Math.floor(Math.min(Math.min(d[1], d[3]),
1809 Math.min(d[5], d[7])));
1810 width = (int) Math.ceil(Math.max(Math.max(d[0], d[2]),
1811 Math.max(d[4], d[6])));
1812 height = (int) Math.ceil(Math.max(Math.max(d[1], d[3]),
1813 Math.max(d[5], d[7])));
1814 } else {
1815 x += transX;
1816 y += transY;
1817 width += x;
1818 height += y;
1819 }
1820
1821 try {
1822 if (!getCompClip().intersectsQuickCheckXYXY(x, y, width, height)) {
1823 return false;
1824 }
1825 } catch (InvalidPipeException e) {
1826 return false;
1827 }
1828 // REMIND: We could go one step further here and examine the
1829 // non-rectangular clip shape more closely if there is one.
1830 // Since the clip has already been rasterized, the performance
1831 // penalty of doing the scan is probably still within the bounds
1832 // of a good tradeoff between speed and quality of the answer.
1833 return true;
1834 }
1835
1836 protected void validateCompClip() {
1837 int origClipState = clipState;
1838 if (usrClip == null) {
1839 clipState = CLIP_DEVICE;
1840 clipRegion = devClip;
1841 } else if (usrClip instanceof Rectangle2D) {
1842 clipState = CLIP_RECTANGULAR;
1843 if (usrClip instanceof Rectangle) {
1844 clipRegion = devClip.getIntersection((Rectangle)usrClip);
1845 } else {
1846 clipRegion = devClip.getIntersection(usrClip.getBounds());
1847 }
1848 } else {
1849 PathIterator cpi = usrClip.getPathIterator(null);
1850 int box[] = new int[4];
1851 ShapeSpanIterator sr = LoopPipe.getFillSSI(this);
1852 try {
1853 sr.setOutputArea(devClip);
1854 sr.appendPath(cpi);
1855 sr.getPathBox(box);
1856 Region r = Region.getInstance(box);
1857 r.appendSpans(sr);
1858 clipRegion = r;
1859 clipState =
1860 r.isRectangular() ? CLIP_RECTANGULAR : CLIP_SHAPE;
1861 } finally {
1862 sr.dispose();
1863 }
1864 }
1865 if (origClipState != clipState &&
1866 (clipState == CLIP_SHAPE || origClipState == CLIP_SHAPE))
1867 {
1868 validFontInfo = false;
1869 invalidatePipe();
1870 }
1871 }
1872
1873 static final int NON_RECTILINEAR_TRANSFORM_MASK =
1874 (AffineTransform.TYPE_GENERAL_TRANSFORM |
1875 AffineTransform.TYPE_GENERAL_ROTATION);
1876
1877 protected Shape transformShape(Shape s) {
1878 if (s == null) {
1879 return null;
1880 }
1881 if (transformState > TRANSFORM_INT_TRANSLATE) {
1882 return transformShape(transform, s);
1883 } else {
1884 return transformShape(transX, transY, s);
1885 }
1886 }
1887
1888 public Shape untransformShape(Shape s) {
1889 if (s == null) {
1890 return null;
1891 }
1892 if (transformState > TRANSFORM_INT_TRANSLATE) {
1893 try {
1894 return transformShape(transform.createInverse(), s);
1895 } catch (NoninvertibleTransformException e) {
1896 return null;
1897 }
1898 } else {
1899 return transformShape(-transX, -transY, s);
1900 }
1901 }
1902
1903 protected static Shape transformShape(int tx, int ty, Shape s) {
1904 if (s == null) {
1905 return null;
1906 }
1907
1908 if (s instanceof Rectangle) {
1909 Rectangle r = s.getBounds();
1910 r.translate(tx, ty);
1911 return r;
1912 }
1913 if (s instanceof Rectangle2D) {
1914 Rectangle2D rect = (Rectangle2D) s;
1915 return new Rectangle2D.Double(rect.getX() + tx,
1916 rect.getY() + ty,
1917 rect.getWidth(),
1918 rect.getHeight());
1919 }
1920
1921 if (tx == 0 && ty == 0) {
1922 return cloneShape(s);
1923 }
1924
1925 AffineTransform mat = AffineTransform.getTranslateInstance(tx, ty);
1926 return mat.createTransformedShape(s);
1927 }
1928
1929 protected static Shape transformShape(AffineTransform tx, Shape clip) {
1930 if (clip == null) {
1931 return null;
1932 }
1933
1934 if (clip instanceof Rectangle2D &&
1935 (tx.getType() & NON_RECTILINEAR_TRANSFORM_MASK) == 0)
1936 {
1937 Rectangle2D rect = (Rectangle2D) clip;
1938 double matrix[] = new double[4];
1939 matrix[0] = rect.getX();
1940 matrix[1] = rect.getY();
1941 matrix[2] = matrix[0] + rect.getWidth();
1942 matrix[3] = matrix[1] + rect.getHeight();
1943 tx.transform(matrix, 0, matrix, 0, 2);
1944 rect = new Rectangle2D.Float();
1945 rect.setFrameFromDiagonal(matrix[0], matrix[1],
1946 matrix[2], matrix[3]);
1947 return rect;
1948 }
1949
1950 if (tx.isIdentity()) {
1951 return cloneShape(clip);
1952 }
1953
1954 return tx.createTransformedShape(clip);
1955 }
1956
1957 public void clipRect(int x, int y, int w, int h) {
1958 clip(new Rectangle(x, y, w, h));
1959 }
1960
1961 public void setClip(int x, int y, int w, int h) {
1962 setClip(new Rectangle(x, y, w, h));
1963 }
1964
1965 public Shape getClip() {
1966 return untransformShape(usrClip);
1967 }
1968
1969 public void setClip(Shape sh) {
1970 usrClip = transformShape(sh);
1971 validateCompClip();
1972 }
1973
1974 /**
1975 * Intersects the current clip with the specified Path and sets the
1976 * current clip to the resulting intersection. The clip is transformed
1977 * with the current transform in the Graphics2D state before being
1978 * intersected with the current clip. This method is used to make the
1979 * current clip smaller. To make the clip larger, use any setClip method.
1980 * @param p The Path to be intersected with the current clip.
1981 */
1982 public void clip(Shape s) {
1983 s = transformShape(s);
1984 if (usrClip != null) {
1985 s = intersectShapes(usrClip, s, true, true);
1986 }
1987 usrClip = s;
1988 validateCompClip();
1989 }
1990
1991 public void setPaintMode() {
1992 setComposite(AlphaComposite.SrcOver);
1993 }
1994
1995 public void setXORMode(Color c) {
1996 if (c == null) {
1997 throw new IllegalArgumentException("null XORColor");
1998 }
1999 setComposite(new XORComposite(c, surfaceData));
2000 }
2001
2002 Blit lastCAblit;
2003 Composite lastCAcomp;
2004
2005 public void copyArea(int x, int y, int w, int h, int dx, int dy) {
2006 try {
2007 doCopyArea(x, y, w, h, dx, dy);
2008 } catch (InvalidPipeException e) {
2009 try {
2010 revalidateAll();
2011 doCopyArea(x, y, w, h, dx, dy);
2012 } catch (InvalidPipeException e2) {
2013 // Still catching the exception; we are not yet ready to
2014 // validate the surfaceData correctly. Fail for now and
2015 // try again next time around.
2016 }
2017 } finally {
2018 surfaceData.markDirty();
2019 }
2020 }
2021
2022 private void doCopyArea(int x, int y, int w, int h, int dx, int dy) {
2023 if (w <= 0 || h <= 0) {
2024 return;
2025 }
2026 SurfaceData theData = surfaceData;
2027 if (theData.copyArea(this, x, y, w, h, dx, dy)) {
2028 return;
2029 }
2030 if (transformState >= TRANSFORM_TRANSLATESCALE) {
2031 throw new InternalError("transformed copyArea not implemented yet");
2032 }
2033 // REMIND: This method does not deal with missing data from the
2034 // source object (i.e. it does not send exposure events...)
2035
2036 Region clip = getCompClip();
2037
2038 Composite comp = composite;
2039 if (lastCAcomp != comp) {
2040 SurfaceType dsttype = theData.getSurfaceType();
2041 CompositeType comptype = imageComp;
2042 if (CompositeType.SrcOverNoEa.equals(comptype) &&
2043 theData.getTransparency() == Transparency.OPAQUE)
2044 {
2045 comptype = CompositeType.SrcNoEa;
2046 }
2047 lastCAblit = Blit.locate(dsttype, comptype, dsttype);
2048 lastCAcomp = comp;
2049 }
2050
2051 x += transX;
2052 y += transY;
2053
2054 Blit ob = lastCAblit;
2055 if (dy == 0 && dx > 0 && dx < w) {
2056 while (w > 0) {
2057 int partW = Math.min(w, dx);
2058 w -= partW;
2059 int sx = x + w;
2060 ob.Blit(theData, theData, comp, clip,
2061 sx, y, sx+dx, y+dy, partW, h);
2062 }
2063 return;
2064 }
2065 if (dy > 0 && dy < h && dx > -w && dx < w) {
2066 while (h > 0) {
2067 int partH = Math.min(h, dy);
2068 h -= partH;
2069 int sy = y + h;
2070 ob.Blit(theData, theData, comp, clip,
2071 x, sy, x+dx, sy+dy, w, partH);
2072 }
2073 return;
2074 }
2075 ob.Blit(theData, theData, comp, clip, x, y, x+dx, y+dy, w, h);
2076 }
2077
2078 /*
2079 public void XcopyArea(int x, int y, int w, int h, int dx, int dy) {
2080 Rectangle rect = new Rectangle(x, y, w, h);
2081 rect = transformBounds(rect, transform);
2082 Point2D point = new Point2D.Float(dx, dy);
2083 Point2D root = new Point2D.Float(0, 0);
2084 point = transform.transform(point, point);
2085 root = transform.transform(root, root);
2086 int fdx = (int)(point.getX()-root.getX());
2087 int fdy = (int)(point.getY()-root.getY());
2088
2089 Rectangle r = getCompBounds().intersection(rect.getBounds());
2090
2091 if (r.isEmpty()) {
2092 return;
2093 }
2094
2095 // Begin Rasterizer for Clip Shape
2096 boolean skipClip = true;
2097 byte[] clipAlpha = null;
2098
2099 if (clipState == CLIP_SHAPE) {
2100
2101 int box[] = new int[4];
2102
2103 clipRegion.getBounds(box);
2104 Rectangle devR = new Rectangle(box[0], box[1],
2105 box[2] - box[0],
2106 box[3] - box[1]);
2107 if (!devR.isEmpty()) {
2108 OutputManager mgr = getOutputManager();
2109 RegionIterator ri = clipRegion.getIterator();
2110 while (ri.nextYRange(box)) {
2111 int spany = box[1];
2112 int spanh = box[3] - spany;
2113 while (ri.nextXBand(box)) {
2114 int spanx = box[0];
2115 int spanw = box[2] - spanx;
2116 mgr.copyArea(this, null,
2117 spanw, 0,
2118 spanx, spany,
2119 spanw, spanh,
2120 fdx, fdy,
2121 null);
2122 }
2123 }
2124 }
2125 return;
2126 }
2127 // End Rasterizer for Clip Shape
2128
2129 getOutputManager().copyArea(this, null,
2130 r.width, 0,
2131 r.x, r.y, r.width,
2132 r.height, fdx, fdy,
2133 null);
2134 }
2135 */
2136
2137 public void drawLine(int x1, int y1, int x2, int y2) {
2138 try {
2139 drawpipe.drawLine(this, x1, y1, x2, y2);
2140 } catch (InvalidPipeException e) {
2141 try {
2142 revalidateAll();
2143 drawpipe.drawLine(this, x1, y1, x2, y2);
2144 } catch (InvalidPipeException e2) {
2145 // Still catching the exception; we are not yet ready to
2146 // validate the surfaceData correctly. Fail for now and
2147 // try again next time around.
2148 }
2149 } finally {
2150 surfaceData.markDirty();
2151 }
2152 }
2153
2154 public void drawRoundRect(int x, int y, int w, int h, int arcW, int arcH) {
2155 try {
2156 drawpipe.drawRoundRect(this, x, y, w, h, arcW, arcH);
2157 } catch (InvalidPipeException e) {
2158 try {
2159 revalidateAll();
2160 drawpipe.drawRoundRect(this, x, y, w, h, arcW, arcH);
2161 } catch (InvalidPipeException e2) {
2162 // Still catching the exception; we are not yet ready to
2163 // validate the surfaceData correctly. Fail for now and
2164 // try again next time around.
2165 }
2166 } finally {
2167 surfaceData.markDirty();
2168 }
2169 }
2170
2171 public void fillRoundRect(int x, int y, int w, int h, int arcW, int arcH) {
2172 try {
2173 fillpipe.fillRoundRect(this, x, y, w, h, arcW, arcH);
2174 } catch (InvalidPipeException e) {
2175 try {
2176 revalidateAll();
2177 fillpipe.fillRoundRect(this, x, y, w, h, arcW, arcH);
2178 } catch (InvalidPipeException e2) {
2179 // Still catching the exception; we are not yet ready to
2180 // validate the surfaceData correctly. Fail for now and
2181 // try again next time around.
2182 }
2183 } finally {
2184 surfaceData.markDirty();
2185 }
2186 }
2187
2188 public void drawOval(int x, int y, int w, int h) {
2189 try {
2190 drawpipe.drawOval(this, x, y, w, h);
2191 } catch (InvalidPipeException e) {
2192 try {
2193 revalidateAll();
2194 drawpipe.drawOval(this, x, y, w, h);
2195 } catch (InvalidPipeException e2) {
2196 // Still catching the exception; we are not yet ready to
2197 // validate the surfaceData correctly. Fail for now and
2198 // try again next time around.
2199 }
2200 } finally {
2201 surfaceData.markDirty();
2202 }
2203 }
2204
2205 public void fillOval(int x, int y, int w, int h) {
2206 try {
2207 fillpipe.fillOval(this, x, y, w, h);
2208 } catch (InvalidPipeException e) {
2209 try {
2210 revalidateAll();
2211 fillpipe.fillOval(this, x, y, w, h);
2212 } catch (InvalidPipeException e2) {
2213 // Still catching the exception; we are not yet ready to
2214 // validate the surfaceData correctly. Fail for now and
2215 // try again next time around.
2216 }
2217 } finally {
2218 surfaceData.markDirty();
2219 }
2220 }
2221
2222 public void drawArc(int x, int y, int w, int h,
2223 int startAngl, int arcAngl) {
2224 try {
2225 drawpipe.drawArc(this, x, y, w, h, startAngl, arcAngl);
2226 } catch (InvalidPipeException e) {
2227 try {
2228 revalidateAll();
2229 drawpipe.drawArc(this, x, y, w, h, startAngl, arcAngl);
2230 } catch (InvalidPipeException e2) {
2231 // Still catching the exception; we are not yet ready to
2232 // validate the surfaceData correctly. Fail for now and
2233 // try again next time around.
2234 }
2235 } finally {
2236 surfaceData.markDirty();
2237 }
2238 }
2239
2240 public void fillArc(int x, int y, int w, int h,
2241 int startAngl, int arcAngl) {
2242 try {
2243 fillpipe.fillArc(this, x, y, w, h, startAngl, arcAngl);
2244 } catch (InvalidPipeException e) {
2245 try {
2246 revalidateAll();
2247 fillpipe.fillArc(this, x, y, w, h, startAngl, arcAngl);
2248 } catch (InvalidPipeException e2) {
2249 // Still catching the exception; we are not yet ready to
2250 // validate the surfaceData correctly. Fail for now and
2251 // try again next time around.
2252 }
2253 } finally {
2254 surfaceData.markDirty();
2255 }
2256 }
2257
2258 public void drawPolyline(int xPoints[], int yPoints[], int nPoints) {
2259 try {
2260 drawpipe.drawPolyline(this, xPoints, yPoints, nPoints);
2261 } catch (InvalidPipeException e) {
2262 try {
2263 revalidateAll();
2264 drawpipe.drawPolyline(this, xPoints, yPoints, nPoints);
2265 } catch (InvalidPipeException e2) {
2266 // Still catching the exception; we are not yet ready to
2267 // validate the surfaceData correctly. Fail for now and
2268 // try again next time around.
2269 }
2270 } finally {
2271 surfaceData.markDirty();
2272 }
2273 }
2274
2275 public void drawPolygon(int xPoints[], int yPoints[], int nPoints) {
2276 try {
2277 drawpipe.drawPolygon(this, xPoints, yPoints, nPoints);
2278 } catch (InvalidPipeException e) {
2279 try {
2280 revalidateAll();
2281 drawpipe.drawPolygon(this, xPoints, yPoints, nPoints);
2282 } catch (InvalidPipeException e2) {
2283 // Still catching the exception; we are not yet ready to
2284 // validate the surfaceData correctly. Fail for now and
2285 // try again next time around.
2286 }
2287 } finally {
2288 surfaceData.markDirty();
2289 }
2290 }
2291
2292 public void fillPolygon(int xPoints[], int yPoints[], int nPoints) {
2293 try {
2294 fillpipe.fillPolygon(this, xPoints, yPoints, nPoints);
2295 } catch (InvalidPipeException e) {
2296 try {
2297 revalidateAll();
2298 fillpipe.fillPolygon(this, xPoints, yPoints, nPoints);
2299 } catch (InvalidPipeException e2) {
2300 // Still catching the exception; we are not yet ready to
2301 // validate the surfaceData correctly. Fail for now and
2302 // try again next time around.
2303 }
2304 } finally {
2305 surfaceData.markDirty();
2306 }
2307 }
2308
2309 public void drawRect (int x, int y, int w, int h) {
2310 try {
2311 drawpipe.drawRect(this, x, y, w, h);
2312 } catch (InvalidPipeException e) {
2313 try {
2314 revalidateAll();
2315 drawpipe.drawRect(this, x, y, w, h);
2316 } catch (InvalidPipeException e2) {
2317 // Still catching the exception; we are not yet ready to
2318 // validate the surfaceData correctly. Fail for now and
2319 // try again next time around.
2320 }
2321 } finally {
2322 surfaceData.markDirty();
2323 }
2324 }
2325
2326 public void fillRect (int x, int y, int w, int h) {
2327 try {
2328 fillpipe.fillRect(this, x, y, w, h);
2329 } catch (InvalidPipeException e) {
2330 try {
2331 revalidateAll();
2332 fillpipe.fillRect(this, x, y, w, h);
2333 } catch (InvalidPipeException e2) {
2334 // Still catching the exception; we are not yet ready to
2335 // validate the surfaceData correctly. Fail for now and
2336 // try again next time around.
2337 }
2338 } finally {
2339 surfaceData.markDirty();
2340 }
2341 }
2342
2343 private void revalidateAll() {
2344 try {
2345 // REMIND: This locking needs to be done around the
2346 // caller of this method so that the pipe stays valid
2347 // long enough to call the new primitive.
2348 // REMIND: No locking yet in screen SurfaceData objects!
2349 // surfaceData.lock();
2350 surfaceData = surfaceData.getReplacement();
2351 if (surfaceData == null) {
2352 surfaceData = NullSurfaceData.theInstance;
2353 }
2354
2355 // this will recalculate the composite clip
2356 setDevClip(surfaceData.getBounds());
2357
2358 if (paintState <= PAINT_ALPHACOLOR) {
2359 validateColor();
2360 }
2361 if (composite instanceof XORComposite) {
2362 Color c = ((XORComposite) composite).getXorColor();
2363 setComposite(new XORComposite(c, surfaceData));
2364 }
2365 validatePipe();
2366 } finally {
2367 // REMIND: No locking yet in screen SurfaceData objects!
2368 // surfaceData.unlock();
2369 }
2370 }
2371
2372 public void clearRect(int x, int y, int w, int h) {
2373 // REMIND: has some "interesting" consequences if threads are
2374 // not synchronized
2375 Composite c = composite;
2376 Paint p = paint;
2377 setComposite(AlphaComposite.Src);
2378 setColor(getBackground());
2379 fillRect(x, y, w, h);
2380 setPaint(p);
2381 setComposite(c);
2382 }
2383
2384 /**
2385 * Strokes the outline of a Path using the settings of the current
2386 * graphics state. The rendering attributes applied include the
2387 * clip, transform, paint or color, composite and stroke attributes.
2388 * @param p The path to be drawn.
2389 * @see #setStroke
2390 * @see #setPaint
2391 * @see java.awt.Graphics#setColor
2392 * @see #transform
2393 * @see #setTransform
2394 * @see #clip
2395 * @see #setClip
2396 * @see #setComposite
2397 */
2398 public void draw(Shape s) {
2399 try {
2400 shapepipe.draw(this, s);
2401 } catch (InvalidPipeException e) {
2402 try {
2403 revalidateAll();
2404 shapepipe.draw(this, s);
2405 } catch (InvalidPipeException e2) {
2406 // Still catching the exception; we are not yet ready to
2407 // validate the surfaceData correctly. Fail for now and
2408 // try again next time around.
2409 }
2410 } finally {
2411 surfaceData.markDirty();
2412 }
2413 }
2414
2415
2416 /**
2417 * Fills the interior of a Path using the settings of the current
2418 * graphics state. The rendering attributes applied include the
2419 * clip, transform, paint or color, and composite.
2420 * @see #setPaint
2421 * @see java.awt.Graphics#setColor
2422 * @see #transform
2423 * @see #setTransform
2424 * @see #setComposite
2425 * @see #clip
2426 * @see #setClip
2427 */
2428 public void fill(Shape s) {
2429 try {
2430 shapepipe.fill(this, s);
2431 } catch (InvalidPipeException e) {
2432 try {
2433 revalidateAll();
2434 shapepipe.fill(this, s);
2435 } catch (InvalidPipeException e2) {
2436 // Still catching the exception; we are not yet ready to
2437 // validate the surfaceData correctly. Fail for now and
2438 // try again next time around.
2439 }
2440 } finally {
2441 surfaceData.markDirty();
2442 }
2443 }
2444
2445 /**
2446 * Returns true if the given AffineTransform is an integer
2447 * translation.
2448 */
2449 private static boolean isIntegerTranslation(AffineTransform xform) {
2450 if (xform.isIdentity()) {
2451 return true;
2452 }
2453 if (xform.getType() == AffineTransform.TYPE_TRANSLATION) {
2454 double tx = xform.getTranslateX();
2455 double ty = xform.getTranslateY();
2456 return (tx == (int)tx && ty == (int)ty);
2457 }
2458 return false;
2459 }
2460
2461 /**
2462 * Returns the index of the tile corresponding to the supplied position
2463 * given the tile grid offset and size along the same axis.
2464 */
2465 private static int getTileIndex(int p, int tileGridOffset, int tileSize) {
2466 p -= tileGridOffset;
2467 if (p < 0) {
2468 p += 1 - tileSize; // force round to -infinity (ceiling)
2469 }
2470 return p/tileSize;
2471 }
2472
2473 /**
2474 * Returns a rectangle in image coordinates that may be required
2475 * in order to draw the given image into the given clipping region
2476 * through a pair of AffineTransforms. In addition, horizontal and
2477 * vertical padding factors for antialising and interpolation may
2478 * be used.
2479 */
2480 private static Rectangle getImageRegion(RenderedImage img,
2481 Region compClip,
2482 AffineTransform transform,
2483 AffineTransform xform,
2484 int padX, int padY) {
2485 Rectangle imageRect =
2486 new Rectangle(img.getMinX(), img.getMinY(),
2487 img.getWidth(), img.getHeight());
2488
2489 Rectangle result = null;
2490 try {
2491 double p[] = new double[8];
2492 p[0] = p[2] = compClip.getLoX();
2493 p[4] = p[6] = compClip.getHiX();
2494 p[1] = p[5] = compClip.getLoY();
2495 p[3] = p[7] = compClip.getHiY();
2496
2497 // Inverse transform the output bounding rect
2498 transform.inverseTransform(p, 0, p, 0, 4);
2499 xform.inverseTransform(p, 0, p, 0, 4);
2500
2501 // Determine a bounding box for the inverse transformed region
2502 double x0,x1,y0,y1;
2503 x0 = x1 = p[0];
2504 y0 = y1 = p[1];
2505
2506 for (int i = 2; i < 8; ) {
2507 double pt = p[i++];
2508 if (pt < x0) {
2509 x0 = pt;
2510 } else if (pt > x1) {
2511 x1 = pt;
2512 }
2513 pt = p[i++];
2514 if (pt < y0) {
2515 y0 = pt;
2516 } else if (pt > y1) {
2517 y1 = pt;
2518 }
2519 }
2520
2521 // This is padding for anti-aliasing and such. It may
2522 // be more than is needed.
2523 int x = (int)x0 - padX;
2524 int w = (int)(x1 - x0 + 2*padX);
2525 int y = (int)y0 - padY;
2526 int h = (int)(y1 - y0 + 2*padY);
2527
2528 Rectangle clipRect = new Rectangle(x,y,w,h);
2529 result = clipRect.intersection(imageRect);
2530 } catch (NoninvertibleTransformException nte) {
2531 // Worst case bounds are the bounds of the image.
2532 result = imageRect;
2533 }
2534
2535 return result;
2536 }
2537
2538 /**
2539 * Draws an image, applying a transform from image space into user space
2540 * before drawing.
2541 * The transformation from user space into device space is done with
2542 * the current transform in the Graphics2D.
2543 * The given transformation is applied to the image before the
2544 * transform attribute in the Graphics2D state is applied.
2545 * The rendering attributes applied include the clip, transform,
2546 * and composite attributes. Note that the result is
2547 * undefined, if the given transform is noninvertible.
2548 * @param img The image to be drawn. Does nothing if img is null.
2549 * @param xform The transformation from image space into user space.
2550 * @see #transform
2551 * @see #setTransform
2552 * @see #setComposite
2553 * @see #clip
2554 * @see #setClip
2555 */
2556 public void drawRenderedImage(RenderedImage img,
2557 AffineTransform xform) {
2558
2559 if (img == null) {
2560 return;
2561 }
2562
2563 // BufferedImage case: use a simple drawImage call
2564 if (img instanceof BufferedImage) {
2565 BufferedImage bufImg = (BufferedImage)img;
2566 drawImage(bufImg,xform,null);
2567 return;
2568 }
2569
2570 // transformState tracks the state of transform and
2571 // transX, transY contain the integer casts of the
2572 // translation factors
2573 boolean isIntegerTranslate =
2574 (transformState <= TRANSFORM_INT_TRANSLATE) &&
2575 isIntegerTranslation(xform);
2576
2577 // Include padding for interpolation/antialiasing if necessary
2578 int pad = isIntegerTranslate ? 0 : 3;
2579
2580 Region clip;
2581 try {
2582 clip = getCompClip();
2583 } catch (InvalidPipeException e) {
2584 return;
2585 }
2586
2587 // Determine the region of the image that may contribute to
2588 // the clipped drawing area
2589 Rectangle region = getImageRegion(img,
2590 clip,
2591 transform,
2592 xform,
2593 pad, pad);
2594 if (region.width <= 0 || region.height <= 0) {
2595 return;
2596 }
2597
2598 // Attempt to optimize integer translation of tiled images.
2599 // Although theoretically we are O.K. if the concatenation of
2600 // the user transform and the device transform is an integer
2601 // translation, we'll play it safe and only optimize the case
2602 // where both are integer translations.
2603 if (isIntegerTranslate) {
2604 // Use optimized code
2605 // Note that drawTranslatedRenderedImage calls copyImage
2606 // which takes the user space to device space transform into
2607 // account, but we need to provide the image space to user space
2608 // translations.
2609
2610 drawTranslatedRenderedImage(img, region,
2611 (int) xform.getTranslateX(),
2612 (int) xform.getTranslateY());
2613 return;
2614 }
2615
2616 // General case: cobble the necessary region into a single Raster
2617 Raster raster = img.getData(region);
2618
2619 // Make a new Raster with the same contents as raster
2620 // but starting at (0, 0). This raster is thus in the same
2621 // coordinate system as the SampleModel of the original raster.
2622 WritableRaster wRaster =
2623 Raster.createWritableRaster(raster.getSampleModel(),
2624 raster.getDataBuffer(),
2625 null);
2626
2627 // If the original raster was in a different coordinate
2628 // system than its SampleModel, we need to perform an
2629 // additional translation in order to get the (minX, minY)
2630 // pixel of raster to be pixel (0, 0) of wRaster. We also
2631 // have to have the correct width and height.
2632 int minX = raster.getMinX();
2633 int minY = raster.getMinY();
2634 int width = raster.getWidth();
2635 int height = raster.getHeight();
2636 int px = minX - raster.getSampleModelTranslateX();
2637 int py = minY - raster.getSampleModelTranslateY();
2638 if (px != 0 || py != 0 || width != wRaster.getWidth() ||
2639 height != wRaster.getHeight()) {
2640 wRaster =
2641 wRaster.createWritableChild(px,
2642 py,
2643 width,
2644 height,
2645 0, 0,
2646 null);
2647 }
2648
2649 // Now we have a BufferedImage starting at (0, 0)
2650 // with the same contents that started at (minX, minY)
2651 // in raster. So we must draw the BufferedImage with a
2652 // translation of (minX, minY).
2653 AffineTransform transXform = (AffineTransform)xform.clone();
2654 transXform.translate(minX, minY);
2655
2656 ColorModel cm = img.getColorModel();
2657 BufferedImage bufImg = new BufferedImage(cm,
2658 wRaster,
2659 cm.isAlphaPremultiplied(),
2660 null);
2661 drawImage(bufImg, transXform, null);
2662 }
2663
2664 /**
2665 * Intersects <code>destRect</code> with <code>clip</code> and
2666 * overwrites <code>destRect</code> with the result.
2667 * Returns false if the intersection was empty, true otherwise.
2668 */
2669 private boolean clipTo(Rectangle destRect, Rectangle clip) {
2670 int x1 = Math.max(destRect.x, clip.x);
2671 int x2 = Math.min(destRect.x + destRect.width, clip.x + clip.width);
2672 int y1 = Math.max(destRect.y, clip.y);
2673 int y2 = Math.min(destRect.y + destRect.height, clip.y + clip.height);
2674 if (((x2 - x1) < 0) || ((y2 - y1) < 0)) {
2675 destRect.width = -1; // Set both just to be safe
2676 destRect.height = -1;
2677 return false;
2678 } else {
2679 destRect.x = x1;
2680 destRect.y = y1;
2681 destRect.width = x2 - x1;
2682 destRect.height = y2 - y1;
2683 return true;
2684 }
2685 }
2686
2687 /**
2688 * Draw a portion of a RenderedImage tile-by-tile with a given
2689 * integer image to user space translation. The user to
2690 * device transform must also be an integer translation.
2691 */
2692 private void drawTranslatedRenderedImage(RenderedImage img,
2693 Rectangle region,
2694 int i2uTransX,
2695 int i2uTransY) {
2696 // Cache tile grid info
2697 int tileGridXOffset = img.getTileGridXOffset();
2698 int tileGridYOffset = img.getTileGridYOffset();
2699 int tileWidth = img.getTileWidth();
2700 int tileHeight = img.getTileHeight();
2701
2702 // Determine the tile index extrema in each direction
2703 int minTileX =
2704 getTileIndex(region.x, tileGridXOffset, tileWidth);
2705 int minTileY =
2706 getTileIndex(region.y, tileGridYOffset, tileHeight);
2707 int maxTileX =
2708 getTileIndex(region.x + region.width - 1,
2709 tileGridXOffset, tileWidth);
2710 int maxTileY =
2711 getTileIndex(region.y + region.height - 1,
2712 tileGridYOffset, tileHeight);
2713
2714 // Create a single ColorModel to use for all BufferedImages
2715 ColorModel colorModel = img.getColorModel();
2716
2717 // Reuse the same Rectangle for each iteration
2718 Rectangle tileRect = new Rectangle();
2719
2720 for (int ty = minTileY; ty <= maxTileY; ty++) {
2721 for (int tx = minTileX; tx <= maxTileX; tx++) {
2722 // Get the current tile.
2723 Raster raster = img.getTile(tx, ty);
2724
2725 // Fill in tileRect with the tile bounds
2726 tileRect.x = tx*tileWidth + tileGridXOffset;
2727 tileRect.y = ty*tileHeight + tileGridYOffset;
2728 tileRect.width = tileWidth;
2729 tileRect.height = tileHeight;
2730
2731 // Clip the tile against the image bounds and
2732 // backwards mapped clip region
2733 // The result can't be empty
2734 clipTo(tileRect, region);
2735
2736 // Create a WritableRaster containing the tile
2737 WritableRaster wRaster = null;
2738 if (raster instanceof WritableRaster) {
2739 wRaster = (WritableRaster)raster;
2740 } else {
2741 // Create a WritableRaster in the same coordinate system
2742 // as the original raster.
2743 wRaster =
2744 Raster.createWritableRaster(raster.getSampleModel(),
2745 raster.getDataBuffer(),
2746 null);
2747 }
2748
2749 // Translate wRaster to start at (0, 0) and to contain
2750 // only the relevent portion of the tile
2751 wRaster = wRaster.createWritableChild(tileRect.x, tileRect.y,
2752 tileRect.width,
2753 tileRect.height,
2754 0, 0,
2755 null);
2756
2757 // Wrap wRaster in a BufferedImage
2758 BufferedImage bufImg =
2759 new BufferedImage(colorModel,
2760 wRaster,
2761 colorModel.isAlphaPremultiplied(),
2762 null);
2763 // Now we have a BufferedImage starting at (0, 0) that
2764 // represents data from a Raster starting at
2765 // (tileRect.x, tileRect.y). Additionally, it needs
2766 // to be translated by (i2uTransX, i2uTransY). We call
2767 // copyImage to draw just the region of interest
2768 // without needing to create a child image.
2769 copyImage(bufImg, tileRect.x + i2uTransX,
2770 tileRect.y + i2uTransY, 0, 0, tileRect.width,
2771 tileRect.height, null, null);
2772 }
2773 }
2774 }
2775
2776 public void drawRenderableImage(RenderableImage img,
2777 AffineTransform xform) {
2778
2779 if (img == null) {
2780 return;
2781 }
2782
2783 AffineTransform pipeTransform = transform;
2784 AffineTransform concatTransform = new AffineTransform(xform);
2785 concatTransform.concatenate(pipeTransform);
2786 AffineTransform reverseTransform;
2787
2788 RenderContext rc = new RenderContext(concatTransform);
2789
2790 try {
2791 reverseTransform = pipeTransform.createInverse();
2792 } catch (NoninvertibleTransformException nte) {
2793 rc = new RenderContext(pipeTransform);
2794 reverseTransform = new AffineTransform();
2795 }
2796
2797 RenderedImage rendering = img.createRendering(rc);
2798 drawRenderedImage(rendering,reverseTransform);
2799 }
2800
2801
2802
2803 /*
2804 * Transform the bounding box of the BufferedImage
2805 */
2806 protected Rectangle transformBounds(Rectangle rect,
2807 AffineTransform tx) {
2808 if (tx.isIdentity()) {
2809 return rect;
2810 }
2811
2812 Shape s = transformShape(tx, rect);
2813 return s.getBounds();
2814 }
2815
2816 // text rendering methods
2817 public void drawString(String str, int x, int y) {
2818 if (str == null) {
2819 throw new NullPointerException("String is null");
2820 }
2821
2822 if (font.hasLayoutAttributes()) {
2823 if (str.length() == 0) {
2824 return;
2825 }
2826 new TextLayout(str, font, getFontRenderContext()).draw(this, x, y);
2827 return;
2828 }
2829
2830 try {
2831 textpipe.drawString(this, str, x, y);
2832 } catch (InvalidPipeException e) {
2833 try {
2834 revalidateAll();
2835 textpipe.drawString(this, str, x, y);
2836 } catch (InvalidPipeException e2) {
2837 // Still catching the exception; we are not yet ready to
2838 // validate the surfaceData correctly. Fail for now and
2839 // try again next time around.
2840 }
2841 } finally {
2842 surfaceData.markDirty();
2843 }
2844 }
2845
2846 public void drawString(String str, float x, float y) {
2847 if (str == null) {
2848 throw new NullPointerException("String is null");
2849 }
2850
2851 if (font.hasLayoutAttributes()) {
2852 if (str.length() == 0) {
2853 return;
2854 }
2855 new TextLayout(str, font, getFontRenderContext()).draw(this, x, y);
2856 return;
2857 }
2858
2859 try {
2860 textpipe.drawString(this, str, x, y);
2861 } catch (InvalidPipeException e) {
2862 try {
2863 revalidateAll();
2864 textpipe.drawString(this, str, x, y);
2865 } catch (InvalidPipeException e2) {
2866 // Still catching the exception; we are not yet ready to
2867 // validate the surfaceData correctly. Fail for now and
2868 // try again next time around.
2869 }
2870 } finally {
2871 surfaceData.markDirty();
2872 }
2873 }
2874
2875 public void drawString(AttributedCharacterIterator iterator,
2876 int x, int y) {
2877 if (iterator == null) {
2878 throw new NullPointerException("AttributedCharacterIterator is null");
2879 }
2880 if (iterator.getBeginIndex() == iterator.getEndIndex()) {
2881 return; /* nothing to draw */
2882 }
2883 TextLayout tl = new TextLayout(iterator, getFontRenderContext());
2884 tl.draw(this, (float) x, (float) y);
2885 }
2886
2887 public void drawString(AttributedCharacterIterator iterator,
2888 float x, float y) {
2889 if (iterator == null) {
2890 throw new NullPointerException("AttributedCharacterIterator is null");
2891 }
2892 if (iterator.getBeginIndex() == iterator.getEndIndex()) {
2893 return; /* nothing to draw */
2894 }
2895 TextLayout tl = new TextLayout(iterator, getFontRenderContext());
2896 tl.draw(this, x, y);
2897 }
2898
2899 public void drawGlyphVector(GlyphVector gv, float x, float y)
2900 {
2901 if (gv == null) {
2902 throw new NullPointerException("GlyphVector is null");
2903 }
2904
2905 try {
2906 textpipe.drawGlyphVector(this, gv, x, y);
2907 } catch (InvalidPipeException e) {
2908 try {
2909 revalidateAll();
2910 textpipe.drawGlyphVector(this, gv, x, y);
2911 } catch (InvalidPipeException e2) {
2912 // Still catching the exception; we are not yet ready to
2913 // validate the surfaceData correctly. Fail for now and
2914 // try again next time around.
2915 }
2916 } finally {
2917 surfaceData.markDirty();
2918 }
2919 }
2920
2921 public void drawChars(char data[], int offset, int length, int x, int y) {
2922
2923 if (data == null) {
2924 throw new NullPointerException("char data is null");
2925 }
2926 if (offset < 0 || length < 0 || offset + length > data.length) {
2927 throw new ArrayIndexOutOfBoundsException("bad offset/length");
2928 }
2929 if (font.hasLayoutAttributes()) {
2930 if (data.length == 0) {
2931 return;
2932 }
2933 new TextLayout(new String(data, offset, length),
2934 font, getFontRenderContext()).draw(this, x, y);
2935 return;
2936 }
2937
2938 try {
2939 textpipe.drawChars(this, data, offset, length, x, y);
2940 } catch (InvalidPipeException e) {
2941 try {
2942 revalidateAll();
2943 textpipe.drawChars(this, data, offset, length, x, y);
2944 } catch (InvalidPipeException e2) {
2945 // Still catching the exception; we are not yet ready to
2946 // validate the surfaceData correctly. Fail for now and
2947 // try again next time around.
2948 }
2949 } finally {
2950 surfaceData.markDirty();
2951 }
2952 }
2953
2954 public void drawBytes(byte data[], int offset, int length, int x, int y) {
2955 if (data == null) {
2956 throw new NullPointerException("byte data is null");
2957 }
2958 if (offset < 0 || length < 0 || offset + length > data.length) {
2959 throw new ArrayIndexOutOfBoundsException("bad offset/length");
2960 }
2961 /* Byte data is interpreted as 8-bit ASCII. Re-use drawChars loops */
2962 char chData[] = new char[length];
2963 for (int i = length; i-- > 0; ) {
2964 chData[i] = (char)(data[i+offset] & 0xff);
2965 }
2966 if (font.hasLayoutAttributes()) {
2967 if (data.length == 0) {
2968 return;
2969 }
2970 new TextLayout(new String(chData),
2971 font, getFontRenderContext()).draw(this, x, y);
2972 return;
2973 }
2974
2975 try {
2976 textpipe.drawChars(this, chData, 0, length, x, y);
2977 } catch (InvalidPipeException e) {
2978 try {
2979 revalidateAll();
2980 textpipe.drawChars(this, chData, 0, length, x, y);
2981 } catch (InvalidPipeException e2) {
2982 // Still catching the exception; we are not yet ready to
2983 // validate the surfaceData correctly. Fail for now and
2984 // try again next time around.
2985 }
2986 } finally {
2987 surfaceData.markDirty();
2988 }
2989 }
2990 // end of text rendering methods
2991
2992 /**
2993 * Draws an image scaled to x,y,w,h in nonblocking mode with a
2994 * callback object.
2995 */
2996 public boolean drawImage(Image img, int x, int y, int width, int height,
2997 ImageObserver observer) {
2998 return drawImage(img, x, y, width, height, null, observer);
2999 }
3000
3001 /**
3002 * Not part of the advertised API but a useful utility method
3003 * to call internally. This is for the case where we are
3004 * drawing to/from given coordinates using a given width/height,
3005 * but we guarantee that the weidth/height of the src and dest
3006 * areas are equal (no scale needed).
3007 */
3008 public boolean copyImage(Image img, int dx, int dy, int sx, int sy,
3009 int width, int height, Color bgcolor,
3010 ImageObserver observer) {
3011 try {
3012 return imagepipe.copyImage(this, img, dx, dy, sx, sy,
3013 width, height, bgcolor, observer);
3014 } catch (InvalidPipeException e) {
3015 try {
3016 revalidateAll();
3017 return imagepipe.copyImage(this, img, dx, dy, sx, sy,
3018 width, height, bgcolor, observer);
3019 } catch (InvalidPipeException e2) {
3020 // Still catching the exception; we are not yet ready to
3021 // validate the surfaceData correctly. Fail for now and
3022 // try again next time around.
3023 return false;
3024 }
3025 } finally {
3026 surfaceData.markDirty();
3027 }
3028 }
3029
3030 /**
3031 * Draws an image scaled to x,y,w,h in nonblocking mode with a
3032 * solid background color and a callback object.
3033 */
3034 public boolean drawImage(Image img, int x, int y, int width, int height,
3035 Color bg, ImageObserver observer) {
3036
3037 if (img == null) {
3038 return true;
3039 }
3040
3041 if ((width == 0) || (height == 0)) {
3042 return true;
3043 }
3044 if (width == img.getWidth(null) && height == img.getHeight(null)) {
3045 return copyImage(img, x, y, 0, 0, width, height, bg, observer);
3046 }
3047
3048 try {
3049 return imagepipe.scaleImage(this, img, x, y, width, height,
3050 bg, observer);
3051 } catch (InvalidPipeException e) {
3052 try {
3053 revalidateAll();
3054 return imagepipe.scaleImage(this, img, x, y, width, height,
3055 bg, observer);
3056 } catch (InvalidPipeException e2) {
3057 // Still catching the exception; we are not yet ready to
3058 // validate the surfaceData correctly. Fail for now and
3059 // try again next time around.
3060 return false;
3061 }
3062 } finally {
3063 surfaceData.markDirty();
3064 }
3065 }
3066
3067 /**
3068 * Draws an image at x,y in nonblocking mode.
3069 */
3070 public boolean drawImage(Image img, int x, int y, ImageObserver observer) {
3071 return drawImage(img, x, y, null, observer);
3072 }
3073
3074 /**
3075 * Draws an image at x,y in nonblocking mode with a solid background
3076 * color and a callback object.
3077 */
3078 public boolean drawImage(Image img, int x, int y, Color bg,
3079 ImageObserver observer) {
3080
3081 if (img == null) {
3082 return true;
3083 }
3084
3085 try {
3086 return imagepipe.copyImage(this, img, x, y, bg, observer);
3087 } catch (InvalidPipeException e) {
3088 try {
3089 revalidateAll();
3090 return imagepipe.copyImage(this, img, x, y, bg, observer);
3091 } catch (InvalidPipeException e2) {
3092 // Still catching the exception; we are not yet ready to
3093 // validate the surfaceData correctly. Fail for now and
3094 // try again next time around.
3095 return false;
3096 }
3097 } finally {
3098 surfaceData.markDirty();
3099 }
3100 }
3101
3102 /**
3103 * Draws a subrectangle of an image scaled to a destination rectangle
3104 * in nonblocking mode with a callback object.
3105 */
3106 public boolean drawImage(Image img,
3107 int dx1, int dy1, int dx2, int dy2,
3108 int sx1, int sy1, int sx2, int sy2,
3109 ImageObserver observer) {
3110 return drawImage(img, dx1, dy1, dx2, dy2, sx1, sy1, sx2, sy2, null,
3111 observer);
3112 }
3113
3114 /**
3115 * Draws a subrectangle of an image scaled to a destination rectangle in
3116 * nonblocking mode with a solid background color and a callback object.
3117 */
3118 public boolean drawImage(Image img,
3119 int dx1, int dy1, int dx2, int dy2,
3120 int sx1, int sy1, int sx2, int sy2,
3121 Color bgcolor, ImageObserver observer) {
3122
3123 if (img == null) {
3124 return true;
3125 }
3126
3127 if (dx1 == dx2 || dy1 == dy2 ||
3128 sx1 == sx2 || sy1 == sy2)
3129 {
3130 return true;
3131 }
3132
3133 if (((sx2 - sx1) == (dx2 - dx1)) &&
3134 ((sy2 - sy1) == (dy2 - dy1)))
3135 {
3136 // Not a scale - forward it to a copy routine
3137 int srcX, srcY, dstX, dstY, width, height;
3138 if (sx2 > sx1) {
3139 width = sx2 - sx1;
3140 srcX = sx1;
3141 dstX = dx1;
3142 } else {
3143 width = sx1 - sx2;
3144 srcX = sx2;
3145 dstX = dx2;
3146 }
3147 if (sy2 > sy1) {
3148 height = sy2-sy1;
3149 srcY = sy1;
3150 dstY = dy1;
3151 } else {
3152 height = sy1-sy2;
3153 srcY = sy2;
3154 dstY = dy2;
3155 }
3156 return copyImage(img, dstX, dstY, srcX, srcY,
3157 width, height, bgcolor, observer);
3158 }
3159
3160 try {
3161 return imagepipe.scaleImage(this, img, dx1, dy1, dx2, dy2,
3162 sx1, sy1, sx2, sy2, bgcolor,
3163 observer);
3164 } catch (InvalidPipeException e) {
3165 try {
3166 revalidateAll();
3167 return imagepipe.scaleImage(this, img, dx1, dy1, dx2, dy2,
3168 sx1, sy1, sx2, sy2, bgcolor,
3169 observer);
3170 } catch (InvalidPipeException e2) {
3171 // Still catching the exception; we are not yet ready to
3172 // validate the surfaceData correctly. Fail for now and
3173 // try again next time around.
3174 return false;
3175 }
3176 } finally {
3177 surfaceData.markDirty();
3178 }
3179 }
3180
3181 /**
3182 * Draw an image, applying a transform from image space into user space
3183 * before drawing.
3184 * The transformation from user space into device space is done with
3185 * the current transform in the Graphics2D.
3186 * The given transformation is applied to the image before the
3187 * transform attribute in the Graphics2D state is applied.
3188 * The rendering attributes applied include the clip, transform,
3189 * paint or color and composite attributes. Note that the result is
3190 * undefined, if the given transform is non-invertible.
3191 * @param img The image to be drawn.
3192 * @param xform The transformation from image space into user space.
3193 * @param observer The image observer to be notified on the image producing
3194 * progress.
3195 * @see #transform
3196 * @see #setComposite
3197 * @see #setClip
3198 */
3199 public boolean drawImage(Image img,
3200 AffineTransform xform,
3201 ImageObserver observer) {
3202
3203 if (img == null) {
3204 return true;
3205 }
3206
3207 if (xform == null || xform.isIdentity()) {
3208 return drawImage(img, 0, 0, null, observer);
3209 }
3210
3211 try {
3212 return imagepipe.transformImage(this, img, xform, observer);
3213 } catch (InvalidPipeException e) {
3214 try {
3215 revalidateAll();
3216 return imagepipe.transformImage(this, img, xform, observer);
3217 } catch (InvalidPipeException e2) {
3218 // Still catching the exception; we are not yet ready to
3219 // validate the surfaceData correctly. Fail for now and
3220 // try again next time around.
3221 return false;
3222 }
3223 } finally {
3224 surfaceData.markDirty();
3225 }
3226 }
3227
3228 public void drawImage(BufferedImage bImg,
3229 BufferedImageOp op,
3230 int x,
3231 int y) {
3232
3233 if (bImg == null) {
3234 return;
3235 }
3236
3237 try {
3238 imagepipe.transformImage(this, bImg, op, x, y);
3239 } catch (InvalidPipeException e) {
3240 try {
3241 revalidateAll();
3242 imagepipe.transformImage(this, bImg, op, x, y);
3243 } catch (InvalidPipeException e2) {
3244 // Still catching the exception; we are not yet ready to
3245 // validate the surfaceData correctly. Fail for now and
3246 // try again next time around.
3247 }
3248 } finally {
3249 surfaceData.markDirty();
3250 }
3251 }
3252
3253 /**
3254 * Get the rendering context of the font
3255 * within this Graphics2D context.
3256 */
3257 public FontRenderContext getFontRenderContext() {
3258 if (cachedFRC == null) {
3259 int aahint = textAntialiasHint;
3260 if (aahint == SunHints.INTVAL_TEXT_ANTIALIAS_DEFAULT &&
3261 antialiasHint == SunHints.INTVAL_ANTIALIAS_ON) {
3262 aahint = SunHints.INTVAL_TEXT_ANTIALIAS_ON;
3263 }
3264 // Translation components should be excluded from the FRC transform
3265 AffineTransform tx = null;
3266 if (transformState >= TRANSFORM_TRANSLATESCALE) {
3267 if (transform.getTranslateX() == 0 &&
3268 transform.getTranslateY() == 0) {
3269 tx = transform;
3270 } else {
3271 tx = new AffineTransform(transform.getScaleX(),
3272 transform.getShearY(),
3273 transform.getShearX(),
3274 transform.getScaleY(),
3275 0, 0);
3276 }
3277 }
3278 cachedFRC = new FontRenderContext(tx,
3279 SunHints.Value.get(SunHints.INTKEY_TEXT_ANTIALIASING, aahint),
3280 SunHints.Value.get(SunHints.INTKEY_FRACTIONALMETRICS,
3281 fractionalMetricsHint));
3282 }
3283 return cachedFRC;
3284 }
3285 private FontRenderContext cachedFRC;
3286
3287 /**
3288 * This object has no resources to dispose of per se, but the
3289 * doc comments for the base method in java.awt.Graphics imply
3290 * that this object will not be useable after it is disposed.
3291 * So, we sabotage the object to prevent further use to prevent
3292 * developers from relying on behavior that may not work on
3293 * other, less forgiving, VMs that really need to dispose of
3294 * resources.
3295 */
3296 public void dispose() {
3297 surfaceData = NullSurfaceData.theInstance;
3298 invalidatePipe();
3299 }
3300
3301 /**
3302 * Graphics has a finalize method that automatically calls dispose()
3303 * for subclasses. For SunGraphics2D we do not need to be finalized
3304 * so that method simply causes us to be enqueued on the Finalizer
3305 * queues for no good reason. Unfortunately, that method and
3306 * implementation are now considered part of the public contract
3307 * of that base class so we can not remove or gut the method.
3308 * We override it here with an empty method and the VM is smart
3309 * enough to know that if our override is empty then it should not
3310 * mark us as finalizeable.
3311 */
3312 public void finalize() {
3313 // DO NOT REMOVE THIS METHOD
3314 }
3315
3316 /**
3317 * Returns destination that this Graphics renders to. This could be
3318 * either an Image or a Component; subclasses of SurfaceData are
3319 * responsible for returning the appropriate object.
3320 */
3321 public Object getDestination() {
3322 return surfaceData.getDestination();
3323 }
3324
3325 /**
3326 * {@inheritDoc}
3327 *
3328 * @see sun.java2d.DestSurfaceProvider#getDestSurface
3329 */
3330 @Override
3331 public Surface getDestSurface() {
3332 return surfaceData;
3333 }
3334 }