J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1998-2007 Sun Microsystems, Inc. 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package sun.print; |
| 27 | |
| 28 | import java.lang.ref.SoftReference; |
| 29 | import java.util.Hashtable; |
| 30 | import sun.font.CharToGlyphMapper; |
| 31 | import sun.font.CompositeFont; |
| 32 | import sun.font.Font2D; |
| 33 | import sun.font.Font2DHandle; |
| 34 | import sun.font.FontManager; |
| 35 | |
| 36 | import java.awt.Color; |
| 37 | import java.awt.Font; |
| 38 | import java.awt.Graphics2D; |
| 39 | import java.awt.Image; |
| 40 | import java.awt.Paint; |
| 41 | import java.awt.Polygon; |
| 42 | import java.awt.Shape; |
| 43 | |
| 44 | import java.text.AttributedCharacterIterator; |
| 45 | |
| 46 | import java.awt.font.FontRenderContext; |
| 47 | import java.awt.font.GlyphVector; |
| 48 | import java.awt.font.TextAttribute; |
| 49 | import java.awt.font.TextLayout; |
| 50 | |
| 51 | import java.awt.geom.AffineTransform; |
| 52 | import java.awt.geom.Arc2D; |
| 53 | import java.awt.geom.Ellipse2D; |
| 54 | import java.awt.geom.Line2D; |
| 55 | import java.awt.geom.Point2D; |
| 56 | import java.awt.geom.Rectangle2D; |
| 57 | import java.awt.geom.RoundRectangle2D; |
| 58 | import java.awt.geom.PathIterator; |
| 59 | |
| 60 | import java.awt.image.BufferedImage; |
| 61 | import java.awt.image.BufferedImageOp; |
| 62 | import java.awt.image.ColorModel; |
| 63 | import java.awt.image.DataBuffer; |
| 64 | import java.awt.image.DataBufferInt; |
| 65 | import java.awt.image.ImageObserver; |
| 66 | import java.awt.image.IndexColorModel; |
| 67 | import java.awt.image.Raster; |
| 68 | import java.awt.image.RenderedImage; |
| 69 | import java.awt.image.SampleModel; |
| 70 | import java.awt.image.SinglePixelPackedSampleModel; |
| 71 | import java.awt.image.VolatileImage; |
| 72 | import sun.awt.image.ByteComponentRaster; |
| 73 | import sun.awt.image.ToolkitImage; |
| 74 | import sun.awt.image.SunWritableRaster; |
| 75 | |
| 76 | import java.awt.print.PageFormat; |
| 77 | import java.awt.print.Printable; |
| 78 | import java.awt.print.PrinterException; |
| 79 | import java.awt.print.PrinterGraphics; |
| 80 | import java.awt.print.PrinterJob; |
| 81 | |
| 82 | import java.util.Map; |
| 83 | |
| 84 | public abstract class PathGraphics extends ProxyGraphics2D { |
| 85 | |
| 86 | private Printable mPainter; |
| 87 | private PageFormat mPageFormat; |
| 88 | private int mPageIndex; |
| 89 | private boolean mCanRedraw; |
| 90 | protected boolean printingGlyphVector; |
| 91 | |
| 92 | protected PathGraphics(Graphics2D graphics, PrinterJob printerJob, |
| 93 | Printable painter, PageFormat pageFormat, |
| 94 | int pageIndex, boolean canRedraw) { |
| 95 | super(graphics, printerJob); |
| 96 | |
| 97 | mPainter = painter; |
| 98 | mPageFormat = pageFormat; |
| 99 | mPageIndex = pageIndex; |
| 100 | mCanRedraw = canRedraw; |
| 101 | } |
| 102 | |
| 103 | /** |
| 104 | * Return the Printable instance responsible for drawing |
| 105 | * into this Graphics. |
| 106 | */ |
| 107 | protected Printable getPrintable() { |
| 108 | return mPainter; |
| 109 | } |
| 110 | |
| 111 | /** |
| 112 | * Return the PageFormat associated with this page of |
| 113 | * Graphics. |
| 114 | */ |
| 115 | protected PageFormat getPageFormat() { |
| 116 | return mPageFormat; |
| 117 | } |
| 118 | |
| 119 | /** |
| 120 | * Return the page index associated with this Graphics. |
| 121 | */ |
| 122 | protected int getPageIndex() { |
| 123 | return mPageIndex; |
| 124 | } |
| 125 | |
| 126 | /** |
| 127 | * Return true if we are allowed to ask the application |
| 128 | * to redraw portions of the page. In general, with the |
| 129 | * PrinterJob API, the application can be asked to do a |
| 130 | * redraw. When PrinterJob is emulating PrintJob then we |
| 131 | * can not. |
| 132 | */ |
| 133 | public boolean canDoRedraws() { |
| 134 | return mCanRedraw; |
| 135 | } |
| 136 | |
| 137 | /** |
| 138 | * Redraw a rectanglular area using a proxy graphics |
| 139 | */ |
| 140 | public abstract void redrawRegion(Rectangle2D region, |
| 141 | double scaleX, double scaleY, |
| 142 | Shape clip, |
| 143 | AffineTransform devTransform) |
| 144 | |
| 145 | throws PrinterException ; |
| 146 | |
| 147 | /** |
| 148 | * Draws a line, using the current color, between the points |
| 149 | * <code>(x1, y1)</code> and <code>(x2, y2)</code> |
| 150 | * in this graphics context's coordinate system. |
| 151 | * @param x1 the first point's <i>x</i> coordinate. |
| 152 | * @param y1 the first point's <i>y</i> coordinate. |
| 153 | * @param x2 the second point's <i>x</i> coordinate. |
| 154 | * @param y2 the second point's <i>y</i> coordinate. |
| 155 | */ |
| 156 | public void drawLine(int x1, int y1, int x2, int y2) { |
| 157 | |
| 158 | Paint paint = getPaint(); |
| 159 | |
| 160 | try { |
| 161 | AffineTransform deviceTransform = getTransform(); |
| 162 | if (getClip() != null) { |
| 163 | deviceClip(getClip().getPathIterator(deviceTransform)); |
| 164 | } |
| 165 | |
| 166 | deviceDrawLine(x1, y1, x2, y2, (Color) paint); |
| 167 | |
| 168 | } catch (ClassCastException e) { |
| 169 | throw new IllegalArgumentException("Expected a Color instance"); |
| 170 | } |
| 171 | } |
| 172 | |
| 173 | |
| 174 | /** |
| 175 | * Draws the outline of the specified rectangle. |
| 176 | * The left and right edges of the rectangle are at |
| 177 | * <code>x</code> and <code>x + width</code>. |
| 178 | * The top and bottom edges are at |
| 179 | * <code>y</code> and <code>y + height</code>. |
| 180 | * The rectangle is drawn using the graphics context's current color. |
| 181 | * @param x the <i>x</i> coordinate |
| 182 | * of the rectangle to be drawn. |
| 183 | * @param y the <i>y</i> coordinate |
| 184 | * of the rectangle to be drawn. |
| 185 | * @param width the width of the rectangle to be drawn. |
| 186 | * @param height the height of the rectangle to be drawn. |
| 187 | * @see java.awt.Graphics#fillRect |
| 188 | * @see java.awt.Graphics#clearRect |
| 189 | */ |
| 190 | public void drawRect(int x, int y, int width, int height) { |
| 191 | |
| 192 | Paint paint = getPaint(); |
| 193 | |
| 194 | try { |
| 195 | AffineTransform deviceTransform = getTransform(); |
| 196 | if (getClip() != null) { |
| 197 | deviceClip(getClip().getPathIterator(deviceTransform)); |
| 198 | } |
| 199 | |
| 200 | deviceFrameRect(x, y, width, height, (Color) paint); |
| 201 | |
| 202 | } catch (ClassCastException e) { |
| 203 | throw new IllegalArgumentException("Expected a Color instance"); |
| 204 | } |
| 205 | |
| 206 | } |
| 207 | |
| 208 | /** |
| 209 | * Fills the specified rectangle. |
| 210 | * The left and right edges of the rectangle are at |
| 211 | * <code>x</code> and <code>x + width - 1</code>. |
| 212 | * The top and bottom edges are at |
| 213 | * <code>y</code> and <code>y + height - 1</code>. |
| 214 | * The resulting rectangle covers an area |
| 215 | * <code>width</code> pixels wide by |
| 216 | * <code>height</code> pixels tall. |
| 217 | * The rectangle is filled using the graphics context's current color. |
| 218 | * @param x the <i>x</i> coordinate |
| 219 | * of the rectangle to be filled. |
| 220 | * @param y the <i>y</i> coordinate |
| 221 | * of the rectangle to be filled. |
| 222 | * @param width the width of the rectangle to be filled. |
| 223 | * @param height the height of the rectangle to be filled. |
| 224 | * @see java.awt.Graphics#clearRect |
| 225 | * @see java.awt.Graphics#drawRect |
| 226 | */ |
| 227 | public void fillRect(int x, int y, int width, int height){ |
| 228 | |
| 229 | Paint paint = getPaint(); |
| 230 | |
| 231 | try { |
| 232 | AffineTransform deviceTransform = getTransform(); |
| 233 | if (getClip() != null) { |
| 234 | deviceClip(getClip().getPathIterator(deviceTransform)); |
| 235 | } |
| 236 | |
| 237 | deviceFillRect(x, y, width, height, (Color) paint); |
| 238 | |
| 239 | } catch (ClassCastException e) { |
| 240 | throw new IllegalArgumentException("Expected a Color instance"); |
| 241 | } |
| 242 | } |
| 243 | |
| 244 | /** |
| 245 | * Clears the specified rectangle by filling it with the background |
| 246 | * color of the current drawing surface. This operation does not |
| 247 | * use the current paint mode. |
| 248 | * <p> |
| 249 | * Beginning with Java 1.1, the background color |
| 250 | * of offscreen images may be system dependent. Applications should |
| 251 | * use <code>setColor</code> followed by <code>fillRect</code> to |
| 252 | * ensure that an offscreen image is cleared to a specific color. |
| 253 | * @param x the <i>x</i> coordinate of the rectangle to clear. |
| 254 | * @param y the <i>y</i> coordinate of the rectangle to clear. |
| 255 | * @param width the width of the rectangle to clear. |
| 256 | * @param height the height of the rectangle to clear. |
| 257 | * @see java.awt.Graphics#fillRect(int, int, int, int) |
| 258 | * @see java.awt.Graphics#drawRect |
| 259 | * @see java.awt.Graphics#setColor(java.awt.Color) |
| 260 | * @see java.awt.Graphics#setPaintMode |
| 261 | * @see java.awt.Graphics#setXORMode(java.awt.Color) |
| 262 | */ |
| 263 | public void clearRect(int x, int y, int width, int height) { |
| 264 | |
| 265 | fill(new Rectangle2D.Float(x, y, width, height), getBackground()); |
| 266 | } |
| 267 | |
| 268 | /** |
| 269 | * Draws an outlined round-cornered rectangle using this graphics |
| 270 | * context's current color. The left and right edges of the rectangle |
| 271 | * are at <code>x</code> and <code>x + width</code>, |
| 272 | * respectively. The top and bottom edges of the rectangle are at |
| 273 | * <code>y</code> and <code>y + height</code>. |
| 274 | * @param x the <i>x</i> coordinate of the rectangle to be drawn. |
| 275 | * @param y the <i>y</i> coordinate of the rectangle to be drawn. |
| 276 | * @param width the width of the rectangle to be drawn. |
| 277 | * @param height the height of the rectangle to be drawn. |
| 278 | * @param arcWidth the horizontal diameter of the arc |
| 279 | * at the four corners. |
| 280 | * @param arcHeight the vertical diameter of the arc |
| 281 | * at the four corners. |
| 282 | * @see java.awt.Graphics#fillRoundRect |
| 283 | */ |
| 284 | public void drawRoundRect(int x, int y, int width, int height, |
| 285 | int arcWidth, int arcHeight) { |
| 286 | |
| 287 | draw(new RoundRectangle2D.Float(x, y, |
| 288 | width, height, |
| 289 | arcWidth, arcHeight)); |
| 290 | } |
| 291 | |
| 292 | |
| 293 | /** |
| 294 | * Fills the specified rounded corner rectangle with the current color. |
| 295 | * The left and right edges of the rectangle |
| 296 | * are at <code>x</code> and <code>x + width - 1</code>, |
| 297 | * respectively. The top and bottom edges of the rectangle are at |
| 298 | * <code>y</code> and <code>y + height - 1</code>. |
| 299 | * @param x the <i>x</i> coordinate of the rectangle to be filled. |
| 300 | * @param y the <i>y</i> coordinate of the rectangle to be filled. |
| 301 | * @param width the width of the rectangle to be filled. |
| 302 | * @param height the height of the rectangle to be filled. |
| 303 | * @param arcWidth the horizontal diameter |
| 304 | * of the arc at the four corners. |
| 305 | * @param arcHeight the vertical diameter |
| 306 | * of the arc at the four corners. |
| 307 | * @see java.awt.Graphics#drawRoundRect |
| 308 | */ |
| 309 | public void fillRoundRect(int x, int y, int width, int height, |
| 310 | int arcWidth, int arcHeight) { |
| 311 | |
| 312 | fill(new RoundRectangle2D.Float(x, y, |
| 313 | width, height, |
| 314 | arcWidth, arcHeight)); |
| 315 | } |
| 316 | |
| 317 | /** |
| 318 | * Draws the outline of an oval. |
| 319 | * The result is a circle or ellipse that fits within the |
| 320 | * rectangle specified by the <code>x</code>, <code>y</code>, |
| 321 | * <code>width</code>, and <code>height</code> arguments. |
| 322 | * <p> |
| 323 | * The oval covers an area that is |
| 324 | * <code>width + 1</code> pixels wide |
| 325 | * and <code>height + 1</code> pixels tall. |
| 326 | * @param x the <i>x</i> coordinate of the upper left |
| 327 | * corner of the oval to be drawn. |
| 328 | * @param y the <i>y</i> coordinate of the upper left |
| 329 | * corner of the oval to be drawn. |
| 330 | * @param width the width of the oval to be drawn. |
| 331 | * @param height the height of the oval to be drawn. |
| 332 | * @see java.awt.Graphics#fillOval |
| 333 | * @since JDK1.0 |
| 334 | */ |
| 335 | public void drawOval(int x, int y, int width, int height) { |
| 336 | draw(new Ellipse2D.Float(x, y, width, height)); |
| 337 | } |
| 338 | |
| 339 | /** |
| 340 | * Fills an oval bounded by the specified rectangle with the |
| 341 | * current color. |
| 342 | * @param x the <i>x</i> coordinate of the upper left corner |
| 343 | * of the oval to be filled. |
| 344 | * @param y the <i>y</i> coordinate of the upper left corner |
| 345 | * of the oval to be filled. |
| 346 | * @param width the width of the oval to be filled. |
| 347 | * @param height the height of the oval to be filled. |
| 348 | * @see java.awt.Graphics#drawOval |
| 349 | */ |
| 350 | public void fillOval(int x, int y, int width, int height){ |
| 351 | |
| 352 | fill(new Ellipse2D.Float(x, y, width, height)); |
| 353 | } |
| 354 | |
| 355 | /** |
| 356 | * Draws the outline of a circular or elliptical arc |
| 357 | * covering the specified rectangle. |
| 358 | * <p> |
| 359 | * The resulting arc begins at <code>startAngle</code> and extends |
| 360 | * for <code>arcAngle</code> degrees, using the current color. |
| 361 | * Angles are interpreted such that 0 degrees |
| 362 | * is at the 3 o'clock position. |
| 363 | * A positive value indicates a counter-clockwise rotation |
| 364 | * while a negative value indicates a clockwise rotation. |
| 365 | * <p> |
| 366 | * The center of the arc is the center of the rectangle whose origin |
| 367 | * is (<i>x</i>, <i>y</i>) and whose size is specified by the |
| 368 | * <code>width</code> and <code>height</code> arguments. |
| 369 | * <p> |
| 370 | * The resulting arc covers an area |
| 371 | * <code>width + 1</code> pixels wide |
| 372 | * by <code>height + 1</code> pixels tall. |
| 373 | * <p> |
| 374 | * The angles are specified relative to the non-square extents of |
| 375 | * the bounding rectangle such that 45 degrees always falls on the |
| 376 | * line from the center of the ellipse to the upper right corner of |
| 377 | * the bounding rectangle. As a result, if the bounding rectangle is |
| 378 | * noticeably longer in one axis than the other, the angles to the |
| 379 | * start and end of the arc segment will be skewed farther along the |
| 380 | * longer axis of the bounds. |
| 381 | * @param x the <i>x</i> coordinate of the |
| 382 | * upper-left corner of the arc to be drawn. |
| 383 | * @param y the <i>y</i> coordinate of the |
| 384 | * upper-left corner of the arc to be drawn. |
| 385 | * @param width the width of the arc to be drawn. |
| 386 | * @param height the height of the arc to be drawn. |
| 387 | * @param startAngle the beginning angle. |
| 388 | * @param arcAngle the angular extent of the arc, |
| 389 | * relative to the start angle. |
| 390 | * @see java.awt.Graphics#fillArc |
| 391 | */ |
| 392 | public void drawArc(int x, int y, int width, int height, |
| 393 | int startAngle, int arcAngle) { |
| 394 | draw(new Arc2D.Float(x, y, width, height, |
| 395 | startAngle, arcAngle, |
| 396 | Arc2D.OPEN)); |
| 397 | } |
| 398 | |
| 399 | |
| 400 | /** |
| 401 | * Fills a circular or elliptical arc covering the specified rectangle. |
| 402 | * <p> |
| 403 | * The resulting arc begins at <code>startAngle</code> and extends |
| 404 | * for <code>arcAngle</code> degrees. |
| 405 | * Angles are interpreted such that 0 degrees |
| 406 | * is at the 3 o'clock position. |
| 407 | * A positive value indicates a counter-clockwise rotation |
| 408 | * while a negative value indicates a clockwise rotation. |
| 409 | * <p> |
| 410 | * The center of the arc is the center of the rectangle whose origin |
| 411 | * is (<i>x</i>, <i>y</i>) and whose size is specified by the |
| 412 | * <code>width</code> and <code>height</code> arguments. |
| 413 | * <p> |
| 414 | * The resulting arc covers an area |
| 415 | * <code>width + 1</code> pixels wide |
| 416 | * by <code>height + 1</code> pixels tall. |
| 417 | * <p> |
| 418 | * The angles are specified relative to the non-square extents of |
| 419 | * the bounding rectangle such that 45 degrees always falls on the |
| 420 | * line from the center of the ellipse to the upper right corner of |
| 421 | * the bounding rectangle. As a result, if the bounding rectangle is |
| 422 | * noticeably longer in one axis than the other, the angles to the |
| 423 | * start and end of the arc segment will be skewed farther along the |
| 424 | * longer axis of the bounds. |
| 425 | * @param x the <i>x</i> coordinate of the |
| 426 | * upper-left corner of the arc to be filled. |
| 427 | * @param y the <i>y</i> coordinate of the |
| 428 | * upper-left corner of the arc to be filled. |
| 429 | * @param width the width of the arc to be filled. |
| 430 | * @param height the height of the arc to be filled. |
| 431 | * @param startAngle the beginning angle. |
| 432 | * @param arcAngle the angular extent of the arc, |
| 433 | * relative to the start angle. |
| 434 | * @see java.awt.Graphics#drawArc |
| 435 | */ |
| 436 | public void fillArc(int x, int y, int width, int height, |
| 437 | int startAngle, int arcAngle) { |
| 438 | |
| 439 | fill(new Arc2D.Float(x, y, width, height, |
| 440 | startAngle, arcAngle, |
| 441 | Arc2D.PIE)); |
| 442 | } |
| 443 | |
| 444 | /** |
| 445 | * Draws a sequence of connected lines defined by |
| 446 | * arrays of <i>x</i> and <i>y</i> coordinates. |
| 447 | * Each pair of (<i>x</i>, <i>y</i>) coordinates defines a point. |
| 448 | * The figure is not closed if the first point |
| 449 | * differs from the last point. |
| 450 | * @param xPoints an array of <i>x</i> points |
| 451 | * @param yPoints an array of <i>y</i> points |
| 452 | * @param nPoints the total number of points |
| 453 | * @see java.awt.Graphics#drawPolygon(int[], int[], int) |
| 454 | * @since JDK1.1 |
| 455 | */ |
| 456 | public void drawPolyline(int xPoints[], int yPoints[], |
| 457 | int nPoints) { |
| 458 | float fromX; |
| 459 | float fromY; |
| 460 | float toX; |
| 461 | float toY; |
| 462 | |
| 463 | if (nPoints > 0) { |
| 464 | fromX = xPoints[0]; |
| 465 | fromY = yPoints[0]; |
| 466 | for(int i = 1; i < nPoints; i++) { |
| 467 | toX = xPoints[i]; |
| 468 | toY = yPoints[i]; |
| 469 | draw(new Line2D.Float(fromX, fromY, toX, toY)); |
| 470 | fromX = toX; |
| 471 | fromY = toY; |
| 472 | } |
| 473 | } |
| 474 | |
| 475 | } |
| 476 | |
| 477 | |
| 478 | /** |
| 479 | * Draws a closed polygon defined by |
| 480 | * arrays of <i>x</i> and <i>y</i> coordinates. |
| 481 | * Each pair of (<i>x</i>, <i>y</i>) coordinates defines a point. |
| 482 | * <p> |
| 483 | * This method draws the polygon defined by <code>nPoint</code> line |
| 484 | * segments, where the first <code>nPoint - 1</code> |
| 485 | * line segments are line segments from |
| 486 | * <code>(xPoints[i - 1], yPoints[i - 1])</code> |
| 487 | * to <code>(xPoints[i], yPoints[i])</code>, for |
| 488 | * 1 ≤ <i>i</i> ≤ <code>nPoints</code>. |
| 489 | * The figure is automatically closed by drawing a line connecting |
| 490 | * the final point to the first point, if those points are different. |
| 491 | * @param xPoints a an array of <code>x</code> coordinates. |
| 492 | * @param yPoints a an array of <code>y</code> coordinates. |
| 493 | * @param nPoints a the total number of points. |
| 494 | * @see java.awt.Graphics#fillPolygon |
| 495 | * @see java.awt.Graphics#drawPolyline |
| 496 | */ |
| 497 | public void drawPolygon(int xPoints[], int yPoints[], |
| 498 | int nPoints) { |
| 499 | |
| 500 | draw(new Polygon(xPoints, yPoints, nPoints)); |
| 501 | } |
| 502 | |
| 503 | /** |
| 504 | * Draws the outline of a polygon defined by the specified |
| 505 | * <code>Polygon</code> object. |
| 506 | * @param p the polygon to draw. |
| 507 | * @see java.awt.Graphics#fillPolygon |
| 508 | * @see java.awt.Graphics#drawPolyline |
| 509 | */ |
| 510 | public void drawPolygon(Polygon p) { |
| 511 | draw(p); |
| 512 | } |
| 513 | |
| 514 | /** |
| 515 | * Fills a closed polygon defined by |
| 516 | * arrays of <i>x</i> and <i>y</i> coordinates. |
| 517 | * <p> |
| 518 | * This method draws the polygon defined by <code>nPoint</code> line |
| 519 | * segments, where the first <code>nPoint - 1</code> |
| 520 | * line segments are line segments from |
| 521 | * <code>(xPoints[i - 1], yPoints[i - 1])</code> |
| 522 | * to <code>(xPoints[i], yPoints[i])</code>, for |
| 523 | * 1 ≤ <i>i</i> ≤ <code>nPoints</code>. |
| 524 | * The figure is automatically closed by drawing a line connecting |
| 525 | * the final point to the first point, if those points are different. |
| 526 | * <p> |
| 527 | * The area inside the polygon is defined using an |
| 528 | * even-odd fill rule, also known as the alternating rule. |
| 529 | * @param xPoints a an array of <code>x</code> coordinates. |
| 530 | * @param yPoints a an array of <code>y</code> coordinates. |
| 531 | * @param nPoints a the total number of points. |
| 532 | * @see java.awt.Graphics#drawPolygon(int[], int[], int) |
| 533 | */ |
| 534 | public void fillPolygon(int xPoints[], int yPoints[], |
| 535 | int nPoints) { |
| 536 | |
| 537 | fill(new Polygon(xPoints, yPoints, nPoints)); |
| 538 | } |
| 539 | |
| 540 | |
| 541 | /** |
| 542 | * Fills the polygon defined by the specified Polygon object with |
| 543 | * the graphics context's current color. |
| 544 | * <p> |
| 545 | * The area inside the polygon is defined using an |
| 546 | * even-odd fill rule, also known as the alternating rule. |
| 547 | * @param p the polygon to fill. |
| 548 | * @see java.awt.Graphics#drawPolygon(int[], int[], int) |
| 549 | */ |
| 550 | public void fillPolygon(Polygon p) { |
| 551 | |
| 552 | fill(p); |
| 553 | } |
| 554 | |
| 555 | /** |
| 556 | * Draws the text given by the specified string, using this |
| 557 | * graphics context's current font and color. The baseline of the |
| 558 | * first character is at position (<i>x</i>, <i>y</i>) in this |
| 559 | * graphics context's coordinate system. |
| 560 | * @param str the string to be drawn. |
| 561 | * @param x the <i>x</i> coordinate. |
| 562 | * @param y the <i>y</i> coordinate. |
| 563 | * @see java.awt.Graphics#drawBytes |
| 564 | * @see java.awt.Graphics#drawChars |
| 565 | * @since JDK1.0 |
| 566 | */ |
| 567 | public void drawString(String str, int x, int y) { |
| 568 | drawString(str, (float) x, (float) y); |
| 569 | } |
| 570 | |
| 571 | public void drawString(String str, float x, float y) { |
| 572 | if (str.length() == 0) { |
| 573 | return; |
| 574 | } |
| 575 | TextLayout layout = |
| 576 | new TextLayout(str, getFont(), getFontRenderContext()); |
| 577 | layout.draw(this, x, y); |
| 578 | } |
| 579 | |
| 580 | protected void drawString(String str, float x, float y, |
| 581 | Font font, FontRenderContext frc, float w) { |
| 582 | TextLayout layout = |
| 583 | new TextLayout(str, font, frc); |
| 584 | Shape textShape = |
| 585 | layout.getOutline(AffineTransform.getTranslateInstance(x, y)); |
| 586 | fill(textShape); |
| 587 | } |
| 588 | |
| 589 | /** |
| 590 | * Draws the text given by the specified iterator, using this |
| 591 | * graphics context's current color. The iterator has to specify a font |
| 592 | * for each character. The baseline of the |
| 593 | * first character is at position (<i>x</i>, <i>y</i>) in this |
| 594 | * graphics context's coordinate system. |
| 595 | * @param iterator the iterator whose text is to be drawn |
| 596 | * @param x the <i>x</i> coordinate. |
| 597 | * @param y the <i>y</i> coordinate. |
| 598 | * @see java.awt.Graphics#drawBytes |
| 599 | * @see java.awt.Graphics#drawChars |
| 600 | */ |
| 601 | public void drawString(AttributedCharacterIterator iterator, |
| 602 | int x, int y) { |
| 603 | drawString(iterator, (float) x, (float) y); |
| 604 | } |
| 605 | public void drawString(AttributedCharacterIterator iterator, |
| 606 | float x, float y) { |
| 607 | if (iterator == null) { |
| 608 | throw |
| 609 | new NullPointerException("attributedcharacteriterator is null"); |
| 610 | } |
| 611 | TextLayout layout = |
| 612 | new TextLayout(iterator, getFontRenderContext()); |
| 613 | layout.draw(this, x, y); |
| 614 | } |
| 615 | |
| 616 | /** |
| 617 | * Draws a GlyphVector. |
| 618 | * The rendering attributes applied include the clip, transform, |
| 619 | * paint or color, and composite attributes. The GlyphVector specifies |
| 620 | * individual glyphs from a Font. |
| 621 | * @param g The GlyphVector to be drawn. |
| 622 | * @param x,y The coordinates where the glyphs should be drawn. |
| 623 | * @see #setPaint |
| 624 | * @see java.awt.Graphics#setColor |
| 625 | * @see #transform |
| 626 | * @see #setTransform |
| 627 | * @see #setComposite |
| 628 | * @see #clip |
| 629 | * @see #setClip |
| 630 | */ |
| 631 | public void drawGlyphVector(GlyphVector g, |
| 632 | float x, |
| 633 | float y) { |
| 634 | |
| 635 | /* We should not reach here if printingGlyphVector is already true. |
| 636 | * Add an assert so this can be tested if need be. |
| 637 | * But also ensure that we do at least render properly by filling |
| 638 | * the outline. |
| 639 | */ |
| 640 | if (printingGlyphVector) { |
| 641 | assert !printingGlyphVector; // ie false. |
| 642 | fill(g.getOutline(x, y)); |
| 643 | return; |
| 644 | } |
| 645 | |
| 646 | try { |
| 647 | printingGlyphVector = true; |
| 648 | if (RasterPrinterJob.shapeTextProp || |
| 649 | !printedSimpleGlyphVector(g, x, y)) { |
| 650 | fill(g.getOutline(x, y)); |
| 651 | } |
| 652 | } finally { |
| 653 | printingGlyphVector = false; |
| 654 | } |
| 655 | } |
| 656 | |
| 657 | protected static SoftReference<Hashtable<Font2DHandle,Object>> |
| 658 | fontMapRef = new SoftReference<Hashtable<Font2DHandle,Object>>(null); |
| 659 | |
| 660 | protected int platformFontCount(Font font, String str) { |
| 661 | return 0; |
| 662 | } |
| 663 | |
| 664 | /** |
| 665 | * Default implementation returns false. |
| 666 | * Callers of this method must always be prepared for this, |
| 667 | * and delegate to outlines or some other solution. |
| 668 | */ |
| 669 | protected boolean printGlyphVector(GlyphVector gv, float x, float y) { |
| 670 | return false; |
| 671 | } |
| 672 | |
| 673 | /* GlyphVectors are usually encountered because TextLayout is in use. |
| 674 | * Some times TextLayout is needed to handle complex text or some |
| 675 | * rendering attributes trigger it. |
| 676 | * We try to print GlyphVectors by reconstituting into a String, |
| 677 | * as that is most recoverable for applications that export to formats |
| 678 | * such as Postscript or PDF. In some cases (eg where its not complex |
| 679 | * text and its just that positions aren't what we'd expect) we print |
| 680 | * one character at a time. positioning individually. |
| 681 | * Failing that, if we can directly send glyph codes to the printer |
| 682 | * then we do that (printGlyphVector). |
| 683 | * As a last resort we return false and let the caller print as filled |
| 684 | * shapes. |
| 685 | */ |
| 686 | boolean printedSimpleGlyphVector(GlyphVector g, float x, float y) { |
| 687 | |
| 688 | int flags = g.getLayoutFlags(); |
| 689 | |
| 690 | /* We can't handle RTL, re-ordering, complex glyphs etc by |
| 691 | * reconstituting glyphs into a String. So if any flags besides |
| 692 | * position adjustments are set, see if we can directly |
| 693 | * print the GlyphVector as glyph codes, using the positions |
| 694 | * layout has assigned. If that fails return false; |
| 695 | */ |
| 696 | if (flags != 0 && flags != GlyphVector.FLAG_HAS_POSITION_ADJUSTMENTS) { |
| 697 | return printGlyphVector(g, x, y); |
| 698 | } |
| 699 | |
| 700 | Font font = g.getFont(); |
| 701 | Font2D font2D = FontManager.getFont2D(font); |
| 702 | if (font2D.handle.font2D != font2D) { |
| 703 | /* suspicious, may be a bad font. lets bail */ |
| 704 | return false; |
| 705 | } |
| 706 | Hashtable<Font2DHandle,Object> fontMap; |
| 707 | synchronized (PathGraphics.class) { |
| 708 | fontMap = fontMapRef.get(); |
| 709 | if (fontMap == null) { |
| 710 | fontMap = new Hashtable<Font2DHandle,Object>(); |
| 711 | fontMapRef = |
| 712 | new SoftReference<Hashtable<Font2DHandle,Object>>(fontMap); |
| 713 | } |
| 714 | } |
| 715 | |
| 716 | int numGlyphs = g.getNumGlyphs(); |
| 717 | int[] glyphCodes = g.getGlyphCodes(0, numGlyphs, null); |
| 718 | |
| 719 | char[] glyphToCharMap = null; |
| 720 | char[][] mapArray = null; |
| 721 | CompositeFont cf = null; |
| 722 | |
| 723 | /* Build the needed maps for this font in a synchronized block */ |
| 724 | synchronized (fontMap) { |
| 725 | if (font2D instanceof CompositeFont) { |
| 726 | cf = (CompositeFont)font2D; |
| 727 | int numSlots = cf.getNumSlots(); |
| 728 | mapArray = (char[][])fontMap.get(font2D.handle); |
| 729 | if (mapArray == null) { |
| 730 | mapArray = new char[numSlots][]; |
| 731 | fontMap.put(font2D.handle, mapArray); |
| 732 | } |
| 733 | for (int i=0; i<numGlyphs;i++) { |
| 734 | int slot = glyphCodes[i] >>> 24; |
| 735 | if (slot >= numSlots) { /* shouldn't happen */ |
| 736 | return false; |
| 737 | } |
| 738 | if (mapArray[slot] == null) { |
| 739 | Font2D slotFont = cf.getSlotFont(slot); |
| 740 | char[] map = (char[])fontMap.get(slotFont.handle); |
| 741 | if (map == null) { |
| 742 | map = getGlyphToCharMapForFont(slotFont); |
| 743 | } |
| 744 | mapArray[slot] = map; |
| 745 | } |
| 746 | } |
| 747 | } else { |
| 748 | glyphToCharMap = (char[])fontMap.get(font2D.handle); |
| 749 | if (glyphToCharMap == null) { |
| 750 | glyphToCharMap = getGlyphToCharMapForFont(font2D); |
| 751 | fontMap.put(font2D.handle, glyphToCharMap); |
| 752 | } |
| 753 | } |
| 754 | } |
| 755 | |
| 756 | char[] chars = new char[numGlyphs]; |
| 757 | if (cf != null) { |
| 758 | for (int i=0; i<numGlyphs; i++) { |
| 759 | int gc = glyphCodes[i]; |
| 760 | char[] map = mapArray[gc >>> 24]; |
| 761 | gc = gc & 0xffffff; |
| 762 | if (map == null) { |
| 763 | return false; |
| 764 | } |
| 765 | /* X11 symbol & dingbats fonts used only for global metrics, |
| 766 | * so the glyph codes we have really refer to Lucida Sans |
| 767 | * Regular. |
| 768 | * So its possible the glyph code may appear out of range. |
| 769 | * Note that later on we double-check the glyph codes that |
| 770 | * we get from re-creating the GV from the string are the |
| 771 | * same as those we started with. |
| 772 | * |
| 773 | * If the glyphcode is INVISIBLE_GLYPH_ID then this may |
| 774 | * be \t, \n or \r which are mapped to that by layout. |
| 775 | * This is a case we can handle. It doesn't matter what |
| 776 | * character we use (we use \n) so long as layout maps it |
| 777 | * back to this in the verification, since the invisible |
| 778 | * glyph isn't visible :) |
| 779 | */ |
| 780 | char ch; |
| 781 | if (gc == CharToGlyphMapper.INVISIBLE_GLYPH_ID) { |
| 782 | ch = '\n'; |
| 783 | } else if (gc < 0 || gc >= map.length) { |
| 784 | return false; |
| 785 | } else { |
| 786 | ch = map[gc]; |
| 787 | } |
| 788 | if (ch != CharToGlyphMapper.INVISIBLE_GLYPH_ID) { |
| 789 | chars[i] = ch; |
| 790 | } else { |
| 791 | return false; |
| 792 | } |
| 793 | } |
| 794 | } else { |
| 795 | for (int i=0; i<numGlyphs; i++) { |
| 796 | int gc = glyphCodes[i]; |
| 797 | char ch; |
| 798 | if (gc == CharToGlyphMapper.INVISIBLE_GLYPH_ID) { |
| 799 | ch = '\n'; |
| 800 | } else if (gc < 0 || gc >= glyphToCharMap.length) { |
| 801 | return false; |
| 802 | } else { |
| 803 | ch = glyphToCharMap[gc]; |
| 804 | } |
| 805 | if (ch != CharToGlyphMapper.INVISIBLE_GLYPH_ID) { |
| 806 | chars[i] = ch; |
| 807 | } else { |
| 808 | return false; |
| 809 | } |
| 810 | } |
| 811 | } |
| 812 | |
| 813 | FontRenderContext gvFrc = g.getFontRenderContext(); |
| 814 | GlyphVector gv2 = font.createGlyphVector(gvFrc, chars); |
| 815 | if (gv2.getNumGlyphs() != numGlyphs) { |
| 816 | return printGlyphVector(g, x, y); |
| 817 | } |
| 818 | int[] glyphCodes2 = gv2.getGlyphCodes(0, numGlyphs, null); |
| 819 | /* |
| 820 | * Needed to double-check remapping of X11 symbol & dingbats. |
| 821 | */ |
| 822 | for (int i=0; i<numGlyphs; i++) { |
| 823 | if (glyphCodes[i] != glyphCodes2[i]) { |
| 824 | return printGlyphVector(g, x, y); |
| 825 | } |
| 826 | } |
| 827 | |
| 828 | FontRenderContext g2dFrc = getFontRenderContext(); |
| 829 | boolean compatibleFRC = gvFrc.equals(g2dFrc); |
| 830 | /* If differ only in specifying A-A or a translation, these are |
| 831 | * also compatible FRC's, and we can do one drawString call. |
| 832 | */ |
| 833 | if (!compatibleFRC && |
| 834 | gvFrc.usesFractionalMetrics() == g2dFrc.usesFractionalMetrics()) { |
| 835 | AffineTransform gvAT = gvFrc.getTransform(); |
| 836 | AffineTransform g2dAT = getTransform(); |
| 837 | double[] gvMatrix = new double[4]; |
| 838 | double[] g2dMatrix = new double[4]; |
| 839 | gvAT.getMatrix(gvMatrix); |
| 840 | g2dAT.getMatrix(g2dMatrix); |
| 841 | compatibleFRC = true; |
| 842 | for (int i=0;i<4;i++) { |
| 843 | if (gvMatrix[i] != g2dMatrix[i]) { |
| 844 | compatibleFRC = false; |
| 845 | break; |
| 846 | } |
| 847 | } |
| 848 | } |
| 849 | |
| 850 | String str = new String(chars, 0, numGlyphs); |
| 851 | int numFonts = platformFontCount(font, str); |
| 852 | if (numFonts == 0) { |
| 853 | return false; |
| 854 | } |
| 855 | |
| 856 | float[] positions = g.getGlyphPositions(0, numGlyphs, null); |
| 857 | boolean noPositionAdjustments = |
| 858 | ((flags & GlyphVector.FLAG_HAS_POSITION_ADJUSTMENTS) == 0) || |
| 859 | samePositions(gv2, glyphCodes2, glyphCodes, positions); |
| 860 | |
| 861 | /* We have to consider that the application may be directly |
| 862 | * creating a GlyphVector, rather than one being created by |
| 863 | * TextLayout or indirectly from drawString. In such a case, if the |
| 864 | * font has layout attributes, the text may measure differently |
| 865 | * when we reconstitute it into a String and ask for the length that |
| 866 | * drawString would use. For example, KERNING will be applied in such |
| 867 | * a case but that Font attribute is not applied when the application |
| 868 | * directly created a GlyphVector. So in this case we need to verify |
| 869 | * that the text measures the same in both cases - ie that the |
| 870 | * layout attribute has no effect. If it does we can't always |
| 871 | * use the drawString call unless we can coerce the drawString call |
| 872 | * into measuring and displaying the string to the same length. |
| 873 | * That is the case where there is only one font used and we can |
| 874 | * specify the overall advance of the string. (See below). |
| 875 | */ |
| 876 | |
| 877 | Point2D gvAdvancePt = g.getGlyphPosition(numGlyphs); |
| 878 | float gvAdvanceX = (float)gvAdvancePt.getX(); |
| 879 | boolean layoutAffectsAdvance = false; |
| 880 | if (font.hasLayoutAttributes() && printingGlyphVector && |
| 881 | noPositionAdjustments) { |
| 882 | |
| 883 | /* If TRACKING is in use then the glyph vector will report |
| 884 | * position adjustments, then that ought to be sufficient to |
| 885 | * tell us we can't just ask native to do "drawString". But layout |
| 886 | * always sets the position adjustment flag, so we don't believe |
| 887 | * it and verify the positions are really different than |
| 888 | * createGlyphVector() (with no layout) would create. However |
| 889 | * inconsistently, TRACKING is applied when creating a GlyphVector, |
| 890 | * since it doesn't actually require "layout" (even though its |
| 891 | * considered a layout attribute), it just requires a fractional |
| 892 | * tweak to the[default]advances. So we need to specifically |
| 893 | * check for tracking until such time as as we can trust |
| 894 | * the GlyphVector.FLAG_HAS_POSITION_ADJUSTMENTS bit. |
| 895 | */ |
| 896 | Map<TextAttribute, ?> map = font.getAttributes(); |
| 897 | Object o = map.get(TextAttribute.TRACKING); |
| 898 | boolean tracking = o != null && (o instanceof Number) && |
| 899 | (((Number)o).floatValue() != 0f); |
| 900 | |
| 901 | if (tracking) { |
| 902 | noPositionAdjustments = false; |
| 903 | } else { |
| 904 | Rectangle2D bounds = font.getStringBounds(str, gvFrc); |
| 905 | float strAdvanceX = (float)bounds.getWidth(); |
| 906 | if (Math.abs(strAdvanceX - gvAdvanceX) > 0.00001) { |
| 907 | layoutAffectsAdvance = true; |
| 908 | } |
| 909 | } |
| 910 | } |
| 911 | |
| 912 | if (compatibleFRC && noPositionAdjustments && !layoutAffectsAdvance) { |
| 913 | drawString(str, x, y, font, gvFrc, 0f); |
| 914 | return true; |
| 915 | } |
| 916 | |
| 917 | /* If positions have not been explicitly assigned, we can |
| 918 | * ask the string to be drawn adjusted to this width. |
| 919 | * This call is supported only in the PS generator. |
| 920 | * GDI has API to specify the advance for each glyph in a |
| 921 | * string which could be used here too, but that is not yet |
| 922 | * implemented, and we'd need to update the signature of the |
| 923 | * drawString method to take the advances (ie relative positions) |
| 924 | * and use that instead of the width. |
| 925 | */ |
| 926 | if (numFonts == 1 && canDrawStringToWidth() && noPositionAdjustments) { |
| 927 | drawString(str, x, y, font, gvFrc, gvAdvanceX); |
| 928 | return true; |
| 929 | } |
| 930 | |
| 931 | /* In some scripts chars drawn individually do not have the |
| 932 | * same representation (glyphs) as when combined with other chars. |
| 933 | * The logic here is erring on the side of caution, in particular |
| 934 | * in including supplementary characters. |
| 935 | */ |
| 936 | if (FontManager.isComplexText(chars, 0, chars.length)) { |
| 937 | return printGlyphVector(g, x, y); |
| 938 | } |
| 939 | |
| 940 | /* If we reach here we have mapped all the glyphs back |
| 941 | * one-to-one to simple unicode chars that we know are in the font. |
| 942 | * We can call "drawChars" on each one of them in turn, setting |
| 943 | * the position based on the glyph positions. |
| 944 | * There's typically overhead in this. If numGlyphs is 'large', |
| 945 | * it may even be better to try printGlyphVector() in this case. |
| 946 | * This may be less recoverable for apps, but sophisticated apps |
| 947 | * should be able to recover the text from simple glyph vectors |
| 948 | * and we can avoid penalising the more common case - although |
| 949 | * this is already a minority case. |
| 950 | */ |
| 951 | if (numGlyphs > 10 && printGlyphVector(g, x, y)) { |
| 952 | return true; |
| 953 | } |
| 954 | |
| 955 | for (int i=0; i<numGlyphs; i++) { |
| 956 | String s = new String(chars, i, 1); |
| 957 | drawString(s, x+positions[i*2], y+positions[i*2+1], |
| 958 | font, gvFrc, 0f); |
| 959 | } |
| 960 | return true; |
| 961 | } |
| 962 | |
| 963 | /* The same codes must be in the same positions for this to return true. |
| 964 | * This would look cleaner if it took the original GV as a parameter but |
| 965 | * we already have the codes and will need to get the positions array |
| 966 | * too in most cases anyway. So its cheaper to pass them in. |
| 967 | * This call wouldn't be necessary if layout didn't always set the |
| 968 | * FLAG_HAS_POSITION_ADJUSTMENTS even if the default advances are used |
| 969 | * and there was no re-ordering (this should be fixed some day). |
| 970 | */ |
| 971 | private boolean samePositions(GlyphVector gv, int[] gvcodes, |
| 972 | int[] origCodes, float[] origPositions) { |
| 973 | |
| 974 | int numGlyphs = gv.getNumGlyphs(); |
| 975 | float[] gvpos = gv.getGlyphPositions(0, numGlyphs, null); |
| 976 | |
| 977 | /* this shouldn't happen here, but just in case */ |
| 978 | if (numGlyphs != gvcodes.length || /* real paranoia here */ |
| 979 | origCodes.length != gvcodes.length || |
| 980 | origPositions.length != gvpos.length) { |
| 981 | return false; |
| 982 | } |
| 983 | |
| 984 | for (int i=0; i<numGlyphs; i++) { |
| 985 | if (gvcodes[i] != origCodes[i] || gvpos[i] != origPositions[i]) { |
| 986 | return false; |
| 987 | } |
| 988 | } |
| 989 | return true; |
| 990 | } |
| 991 | |
| 992 | protected boolean canDrawStringToWidth() { |
| 993 | return false; |
| 994 | } |
| 995 | |
| 996 | /* return an array which can map glyphs back to char codes. |
| 997 | * Glyphs which aren't mapped from a simple unicode code point |
| 998 | * will have no mapping in this array, and will be assumed to be |
| 999 | * because of some substitution that we can't handle. |
| 1000 | */ |
| 1001 | private static char[] getGlyphToCharMapForFont(Font2D font2D) { |
| 1002 | /* NB Composites report the number of glyphs in slot 0. |
| 1003 | * So if a string uses a char from a later slot, or a fallback slot, |
| 1004 | * it will not be able to use this faster path. |
| 1005 | */ |
| 1006 | int numGlyphs = font2D.getNumGlyphs(); |
| 1007 | int missingGlyph = font2D.getMissingGlyphCode(); |
| 1008 | char[] glyphToCharMap = new char[numGlyphs]; |
| 1009 | int glyph; |
| 1010 | |
| 1011 | for (int i=0;i<numGlyphs; i++) { |
| 1012 | glyphToCharMap[i] = CharToGlyphMapper.INVISIBLE_GLYPH_ID; |
| 1013 | } |
| 1014 | |
| 1015 | /* Consider refining the ranges to try to map by asking the font |
| 1016 | * what ranges it supports. |
| 1017 | * Since a glyph may be mapped by multiple code points, and this |
| 1018 | * code can't handle that, we always prefer the earlier code point. |
| 1019 | */ |
| 1020 | for (char c=0; c<0xFFFF; c++) { |
| 1021 | if (c >= CharToGlyphMapper.HI_SURROGATE_START && |
| 1022 | c <= CharToGlyphMapper.LO_SURROGATE_END) { |
| 1023 | continue; |
| 1024 | } |
| 1025 | glyph = font2D.charToGlyph(c); |
| 1026 | if (glyph != missingGlyph && glyph < numGlyphs && |
| 1027 | (glyphToCharMap[glyph] == |
| 1028 | CharToGlyphMapper.INVISIBLE_GLYPH_ID)) { |
| 1029 | glyphToCharMap[glyph] = c; |
| 1030 | } |
| 1031 | } |
| 1032 | return glyphToCharMap; |
| 1033 | } |
| 1034 | |
| 1035 | /** |
| 1036 | * Strokes the outline of a Shape using the settings of the current |
| 1037 | * graphics state. The rendering attributes applied include the |
| 1038 | * clip, transform, paint or color, composite and stroke attributes. |
| 1039 | * @param s The shape to be drawn. |
| 1040 | * @see #setStroke |
| 1041 | * @see #setPaint |
| 1042 | * @see java.awt.Graphics#setColor |
| 1043 | * @see #transform |
| 1044 | * @see #setTransform |
| 1045 | * @see #clip |
| 1046 | * @see #setClip |
| 1047 | * @see #setComposite |
| 1048 | */ |
| 1049 | public void draw(Shape s) { |
| 1050 | |
| 1051 | fill(getStroke().createStrokedShape(s)); |
| 1052 | } |
| 1053 | |
| 1054 | /** |
| 1055 | * Fills the interior of a Shape using the settings of the current |
| 1056 | * graphics state. The rendering attributes applied include the |
| 1057 | * clip, transform, paint or color, and composite. |
| 1058 | * @see #setPaint |
| 1059 | * @see java.awt.Graphics#setColor |
| 1060 | * @see #transform |
| 1061 | * @see #setTransform |
| 1062 | * @see #setComposite |
| 1063 | * @see #clip |
| 1064 | * @see #setClip |
| 1065 | */ |
| 1066 | public void fill(Shape s) { |
| 1067 | Paint paint = getPaint(); |
| 1068 | |
| 1069 | try { |
| 1070 | fill(s, (Color) paint); |
| 1071 | |
| 1072 | /* The PathGraphics class only supports filling with |
| 1073 | * solid colors and so we do not expect the cast of Paint |
| 1074 | * to Color to fail. If it does fail then something went |
| 1075 | * wrong, like the app draw a page with a solid color but |
| 1076 | * then redrew it with a Gradient. |
| 1077 | */ |
| 1078 | } catch (ClassCastException e) { |
| 1079 | throw new IllegalArgumentException("Expected a Color instance"); |
| 1080 | } |
| 1081 | } |
| 1082 | |
| 1083 | public void fill(Shape s, Color color) { |
| 1084 | AffineTransform deviceTransform = getTransform(); |
| 1085 | |
| 1086 | if (getClip() != null) { |
| 1087 | deviceClip(getClip().getPathIterator(deviceTransform)); |
| 1088 | } |
| 1089 | deviceFill(s.getPathIterator(deviceTransform), color); |
| 1090 | } |
| 1091 | |
| 1092 | /** |
| 1093 | * Fill the path defined by <code>pathIter</code> |
| 1094 | * with the specified color. |
| 1095 | * The path is provided in device coordinates. |
| 1096 | */ |
| 1097 | protected abstract void deviceFill(PathIterator pathIter, Color color); |
| 1098 | |
| 1099 | /* |
| 1100 | * Set the clipping path to that defined by |
| 1101 | * the passed in <code>PathIterator</code>. |
| 1102 | */ |
| 1103 | protected abstract void deviceClip(PathIterator pathIter); |
| 1104 | |
| 1105 | /* |
| 1106 | * Draw the outline of the rectangle without using path |
| 1107 | * if supported by platform. |
| 1108 | */ |
| 1109 | protected abstract void deviceFrameRect(int x, int y, |
| 1110 | int width, int height, |
| 1111 | Color color); |
| 1112 | |
| 1113 | /* |
| 1114 | * Draw a line without using path if supported by platform. |
| 1115 | */ |
| 1116 | protected abstract void deviceDrawLine(int xBegin, int yBegin, |
| 1117 | int xEnd, int yEnd, Color color); |
| 1118 | |
| 1119 | /* |
| 1120 | * Fill a rectangle using specified color. |
| 1121 | */ |
| 1122 | protected abstract void deviceFillRect(int x, int y, |
| 1123 | int width, int height, Color color); |
| 1124 | |
| 1125 | /* Obtain a BI from known implementations of java.awt.Image |
| 1126 | */ |
| 1127 | protected BufferedImage getBufferedImage(Image img) { |
| 1128 | if (img instanceof BufferedImage) { |
| 1129 | // Otherwise we expect a BufferedImage to behave as a standard BI |
| 1130 | return (BufferedImage)img; |
| 1131 | } else if (img instanceof ToolkitImage) { |
| 1132 | // This can be null if the image isn't loaded yet. |
| 1133 | // This is fine as in that case our caller will return |
| 1134 | // as it will only draw a fully loaded image |
| 1135 | return ((ToolkitImage)img).getBufferedImage(); |
| 1136 | } else if (img instanceof VolatileImage) { |
| 1137 | // VI needs to make a new BI: this is unavoidable but |
| 1138 | // I don't expect VI's to be "huge" in any case. |
| 1139 | return ((VolatileImage)img).getSnapshot(); |
| 1140 | } else { |
| 1141 | // may be null or may be some non-standard Image which |
| 1142 | // shouldn't happen as Image is implemented by the platform |
| 1143 | // not by applications |
| 1144 | // If you add a new Image implementation to the platform you |
| 1145 | // will need to support it here similarly to VI. |
| 1146 | return null; |
| 1147 | } |
| 1148 | } |
| 1149 | |
| 1150 | /** |
| 1151 | * Return true if the BufferedImage argument has non-opaque |
| 1152 | * bits in it and therefore can not be directly rendered by |
| 1153 | * GDI. Return false if the image is opaque. If this function |
| 1154 | * can not tell for sure whether the image has transparent |
| 1155 | * pixels then it assumes that it does. |
| 1156 | */ |
| 1157 | protected boolean hasTransparentPixels(BufferedImage bufferedImage) { |
| 1158 | ColorModel colorModel = bufferedImage.getColorModel(); |
| 1159 | boolean hasTransparency = colorModel == null |
| 1160 | ? true |
| 1161 | : colorModel.getTransparency() != ColorModel.OPAQUE; |
| 1162 | |
| 1163 | /* |
| 1164 | * For the default INT ARGB check the image to see if any pixels are |
| 1165 | * really transparent. If there are no transparent pixels then the |
| 1166 | * transparency of the color model can be ignored. |
| 1167 | * We assume that IndexColorModel images have already been |
| 1168 | * checked for transparency and will be OPAQUE unless they actually |
| 1169 | * have transparent pixels present. |
| 1170 | */ |
| 1171 | if (hasTransparency && bufferedImage != null) { |
| 1172 | if (bufferedImage.getType()==BufferedImage.TYPE_INT_ARGB || |
| 1173 | bufferedImage.getType()==BufferedImage.TYPE_INT_ARGB_PRE) { |
| 1174 | DataBuffer db = bufferedImage.getRaster().getDataBuffer(); |
| 1175 | SampleModel sm = bufferedImage.getRaster().getSampleModel(); |
| 1176 | if (db instanceof DataBufferInt && |
| 1177 | sm instanceof SinglePixelPackedSampleModel) { |
| 1178 | SinglePixelPackedSampleModel psm = |
| 1179 | (SinglePixelPackedSampleModel)sm; |
| 1180 | // Stealing the data array for reading only... |
| 1181 | int[] int_data = |
| 1182 | SunWritableRaster.stealData((DataBufferInt) db, 0); |
| 1183 | int x = bufferedImage.getMinX(); |
| 1184 | int y = bufferedImage.getMinY(); |
| 1185 | int w = bufferedImage.getWidth(); |
| 1186 | int h = bufferedImage.getHeight(); |
| 1187 | int stride = psm.getScanlineStride(); |
| 1188 | boolean hastranspixel = false; |
| 1189 | for (int j = y; j < y+h; j++) { |
| 1190 | int yoff = j * stride; |
| 1191 | for (int i = x; i < x+w; i++) { |
| 1192 | if ((int_data[yoff+i] & 0xff000000)!=0xff000000 ) { |
| 1193 | hastranspixel = true; |
| 1194 | break; |
| 1195 | } |
| 1196 | } |
| 1197 | if (hastranspixel) { |
| 1198 | break; |
| 1199 | } |
| 1200 | } |
| 1201 | if (hastranspixel == false) { |
| 1202 | hasTransparency = false; |
| 1203 | } |
| 1204 | } |
| 1205 | } |
| 1206 | } |
| 1207 | |
| 1208 | return hasTransparency; |
| 1209 | } |
| 1210 | |
| 1211 | protected boolean isBitmaskTransparency(BufferedImage bufferedImage) { |
| 1212 | ColorModel colorModel = bufferedImage.getColorModel(); |
| 1213 | return (colorModel != null && |
| 1214 | colorModel.getTransparency() == ColorModel.BITMASK); |
| 1215 | } |
| 1216 | |
| 1217 | |
| 1218 | /* An optimisation for the special case of ICM images which have |
| 1219 | * bitmask transparency. |
| 1220 | */ |
| 1221 | protected boolean drawBitmaskImage(BufferedImage bufferedImage, |
| 1222 | AffineTransform xform, |
| 1223 | Color bgcolor, |
| 1224 | int srcX, int srcY, |
| 1225 | int srcWidth, int srcHeight) { |
| 1226 | |
| 1227 | ColorModel colorModel = bufferedImage.getColorModel(); |
| 1228 | IndexColorModel icm; |
| 1229 | int [] pixels; |
| 1230 | |
| 1231 | if (!(colorModel instanceof IndexColorModel)) { |
| 1232 | return false; |
| 1233 | } else { |
| 1234 | icm = (IndexColorModel)colorModel; |
| 1235 | } |
| 1236 | |
| 1237 | if (colorModel.getTransparency() != ColorModel.BITMASK) { |
| 1238 | return false; |
| 1239 | } |
| 1240 | |
| 1241 | // to be compatible with 1.1 printing which treated b/g colors |
| 1242 | // with alpha 128 as opaque |
| 1243 | if (bgcolor != null && bgcolor.getAlpha() < 128) { |
| 1244 | return false; |
| 1245 | } |
| 1246 | |
| 1247 | if ((xform.getType() |
| 1248 | & ~( AffineTransform.TYPE_UNIFORM_SCALE |
| 1249 | | AffineTransform.TYPE_TRANSLATION |
| 1250 | | AffineTransform.TYPE_QUADRANT_ROTATION |
| 1251 | )) != 0) { |
| 1252 | return false; |
| 1253 | } |
| 1254 | |
| 1255 | if ((getTransform().getType() |
| 1256 | & ~( AffineTransform.TYPE_UNIFORM_SCALE |
| 1257 | | AffineTransform.TYPE_TRANSLATION |
| 1258 | | AffineTransform.TYPE_QUADRANT_ROTATION |
| 1259 | )) != 0) { |
| 1260 | return false; |
| 1261 | } |
| 1262 | |
| 1263 | BufferedImage subImage = null; |
| 1264 | Raster raster = bufferedImage.getRaster(); |
| 1265 | int transpixel = icm.getTransparentPixel(); |
| 1266 | byte[] alphas = new byte[icm.getMapSize()]; |
| 1267 | icm.getAlphas(alphas); |
| 1268 | if (transpixel >= 0) { |
| 1269 | alphas[transpixel] = 0; |
| 1270 | } |
| 1271 | |
| 1272 | /* don't just use srcWidth & srcHeight from application - they |
| 1273 | * may exceed the extent of the image - may need to clip. |
| 1274 | * The image xform will ensure that points are still mapped properly. |
| 1275 | */ |
| 1276 | int rw = raster.getWidth(); |
| 1277 | int rh = raster.getHeight(); |
| 1278 | if (srcX > rw || srcY > rh) { |
| 1279 | return false; |
| 1280 | } |
| 1281 | int right, bottom, wid, hgt; |
| 1282 | if (srcX+srcWidth > rw) { |
| 1283 | right = rw; |
| 1284 | wid = right - srcX; |
| 1285 | } else { |
| 1286 | right = srcX+srcWidth; |
| 1287 | wid = srcWidth; |
| 1288 | } |
| 1289 | if (srcY+srcHeight > rh) { |
| 1290 | bottom = rh; |
| 1291 | hgt = bottom - srcY; |
| 1292 | } else { |
| 1293 | bottom = srcY+srcHeight; |
| 1294 | hgt = srcHeight; |
| 1295 | } |
| 1296 | pixels = new int[wid]; |
| 1297 | for (int j=srcY; j<bottom; j++) { |
| 1298 | int startx = -1; |
| 1299 | raster.getPixels(srcX, j, wid, 1, pixels); |
| 1300 | for (int i=srcX; i<right; i++) { |
| 1301 | if (alphas[pixels[i-srcX]] == 0) { |
| 1302 | if (startx >=0) { |
| 1303 | subImage = bufferedImage.getSubimage(startx, j, |
| 1304 | i-startx, 1); |
| 1305 | xform.translate(startx, j); |
| 1306 | drawImageToPlatform(subImage, xform, bgcolor, |
| 1307 | 0, 0, i-startx, 1, true); |
| 1308 | xform.translate(-startx, -j); |
| 1309 | startx = -1; |
| 1310 | } |
| 1311 | } else if (startx < 0) { |
| 1312 | startx = i; |
| 1313 | } |
| 1314 | } |
| 1315 | if (startx >= 0) { |
| 1316 | subImage = bufferedImage.getSubimage(startx, j, |
| 1317 | right - startx, 1); |
| 1318 | xform.translate(startx, j); |
| 1319 | drawImageToPlatform(subImage, xform, bgcolor, |
| 1320 | 0, 0, right - startx, 1, true); |
| 1321 | xform.translate(-startx, -j); |
| 1322 | } |
| 1323 | } |
| 1324 | return true; |
| 1325 | } |
| 1326 | |
| 1327 | |
| 1328 | |
| 1329 | /** |
| 1330 | * The various <code>drawImage()</code> methods for |
| 1331 | * <code>PathGraphics</code> are all decomposed |
| 1332 | * into an invocation of <code>drawImageToPlatform</code>. |
| 1333 | * The portion of the passed in image defined by |
| 1334 | * <code>srcX, srcY, srcWidth, and srcHeight</code> |
| 1335 | * is transformed by the supplied AffineTransform and |
| 1336 | * drawn using PS to the printer context. |
| 1337 | * |
| 1338 | * @param img The image to be drawn. |
| 1339 | * This method does nothing if <code>img</code> is null. |
| 1340 | * @param xform Used to tranform the image before drawing. |
| 1341 | * This can be null. |
| 1342 | * @param bgcolor This color is drawn where the image has transparent |
| 1343 | * pixels. If this parameter is null then the |
| 1344 | * pixels already in the destination should show |
| 1345 | * through. |
| 1346 | * @param srcX With srcY this defines the upper-left corner |
| 1347 | * of the portion of the image to be drawn. |
| 1348 | * |
| 1349 | * @param srcY With srcX this defines the upper-left corner |
| 1350 | * of the portion of the image to be drawn. |
| 1351 | * @param srcWidth The width of the portion of the image to |
| 1352 | * be drawn. |
| 1353 | * @param srcHeight The height of the portion of the image to |
| 1354 | * be drawn. |
| 1355 | * @param handlingTransparency if being recursively called to |
| 1356 | * print opaque region of transparent image |
| 1357 | */ |
| 1358 | protected abstract boolean |
| 1359 | drawImageToPlatform(Image img, AffineTransform xform, |
| 1360 | Color bgcolor, |
| 1361 | int srcX, int srcY, |
| 1362 | int srcWidth, int srcHeight, |
| 1363 | boolean handlingTransparency); |
| 1364 | |
| 1365 | /** |
| 1366 | * Draws as much of the specified image as is currently available. |
| 1367 | * The image is drawn with its top-left corner at |
| 1368 | * (<i>x</i>, <i>y</i>) in this graphics context's coordinate |
| 1369 | * space. Transparent pixels in the image do not affect whatever |
| 1370 | * pixels are already there. |
| 1371 | * <p> |
| 1372 | * This method returns immediately in all cases, even if the |
| 1373 | * complete image has not yet been loaded, and it has not been dithered |
| 1374 | * and converted for the current output device. |
| 1375 | * <p> |
| 1376 | * If the image has not yet been completely loaded, then |
| 1377 | * <code>drawImage</code> returns <code>false</code>. As more of |
| 1378 | * the image becomes available, the process that draws the image notifies |
| 1379 | * the specified image observer. |
| 1380 | * @param img the specified image to be drawn. |
| 1381 | * @param x the <i>x</i> coordinate. |
| 1382 | * @param y the <i>y</i> coordinate. |
| 1383 | * @param observer object to be notified as more of |
| 1384 | * the image is converted. |
| 1385 | * @see java.awt.Image |
| 1386 | * @see java.awt.image.ImageObserver |
| 1387 | * @see java.awt.image.ImageObserver#imageUpdate(java.awt.Image, int, int, int, int, int) |
| 1388 | * @since JDK1.0 |
| 1389 | */ |
| 1390 | public boolean drawImage(Image img, int x, int y, |
| 1391 | ImageObserver observer) { |
| 1392 | |
| 1393 | return drawImage(img, x, y, null, observer); |
| 1394 | } |
| 1395 | |
| 1396 | /** |
| 1397 | * Draws as much of the specified image as has already been scaled |
| 1398 | * to fit inside the specified rectangle. |
| 1399 | * <p> |
| 1400 | * The image is drawn inside the specified rectangle of this |
| 1401 | * graphics context's coordinate space, and is scaled if |
| 1402 | * necessary. Transparent pixels do not affect whatever pixels |
| 1403 | * are already there. |
| 1404 | * <p> |
| 1405 | * This method returns immediately in all cases, even if the |
| 1406 | * entire image has not yet been scaled, dithered, and converted |
| 1407 | * for the current output device. |
| 1408 | * If the current output representation is not yet complete, then |
| 1409 | * <code>drawImage</code> returns <code>false</code>. As more of |
| 1410 | * the image becomes available, the process that draws the image notifies |
| 1411 | * the image observer by calling its <code>imageUpdate</code> method. |
| 1412 | * <p> |
| 1413 | * A scaled version of an image will not necessarily be |
| 1414 | * available immediately just because an unscaled version of the |
| 1415 | * image has been constructed for this output device. Each size of |
| 1416 | * the image may be cached separately and generated from the original |
| 1417 | * data in a separate image production sequence. |
| 1418 | * @param img the specified image to be drawn. |
| 1419 | * @param x the <i>x</i> coordinate. |
| 1420 | * @param y the <i>y</i> coordinate. |
| 1421 | * @param width the width of the rectangle. |
| 1422 | * @param height the height of the rectangle. |
| 1423 | * @param observer object to be notified as more of |
| 1424 | * the image is converted. |
| 1425 | * @see java.awt.Image |
| 1426 | * @see java.awt.image.ImageObserver |
| 1427 | * @see java.awt.image.ImageObserver#imageUpdate(java.awt.Image, int, int, int, int, int) |
| 1428 | * @since JDK1.0 |
| 1429 | */ |
| 1430 | public boolean drawImage(Image img, int x, int y, |
| 1431 | int width, int height, |
| 1432 | ImageObserver observer) { |
| 1433 | |
| 1434 | return drawImage(img, x, y, width, height, null, observer); |
| 1435 | |
| 1436 | } |
| 1437 | |
| 1438 | /* |
| 1439 | * Draws as much of the specified image as is currently available. |
| 1440 | * The image is drawn with its top-left corner at |
| 1441 | * (<i>x</i>, <i>y</i>) in this graphics context's coordinate |
| 1442 | * space. Transparent pixels are drawn in the specified |
| 1443 | * background color. |
| 1444 | * <p> |
| 1445 | * This operation is equivalent to filling a rectangle of the |
| 1446 | * width and height of the specified image with the given color and then |
| 1447 | * drawing the image on top of it, but possibly more efficient. |
| 1448 | * <p> |
| 1449 | * This method returns immediately in all cases, even if the |
| 1450 | * complete image has not yet been loaded, and it has not been dithered |
| 1451 | * and converted for the current output device. |
| 1452 | * <p> |
| 1453 | * If the image has not yet been completely loaded, then |
| 1454 | * <code>drawImage</code> returns <code>false</code>. As more of |
| 1455 | * the image becomes available, the process that draws the image notifies |
| 1456 | * the specified image observer. |
| 1457 | * @param img the specified image to be drawn. |
| 1458 | * This method does nothing if <code>img</code> is null. |
| 1459 | * @param x the <i>x</i> coordinate. |
| 1460 | * @param y the <i>y</i> coordinate. |
| 1461 | * @param bgcolor the background color to paint under the |
| 1462 | * non-opaque portions of the image. |
| 1463 | * In this WPathGraphics implementation, |
| 1464 | * this parameter can be null in which |
| 1465 | * case that background is made a transparent |
| 1466 | * white. |
| 1467 | * @param observer object to be notified as more of |
| 1468 | * the image is converted. |
| 1469 | * @see java.awt.Image |
| 1470 | * @see java.awt.image.ImageObserver |
| 1471 | * @see java.awt.image.ImageObserver#imageUpdate(java.awt.Image, int, int, int, int, int) |
| 1472 | * @since JDK1.0 |
| 1473 | */ |
| 1474 | public boolean drawImage(Image img, int x, int y, |
| 1475 | Color bgcolor, |
| 1476 | ImageObserver observer) { |
| 1477 | |
| 1478 | if (img == null) { |
| 1479 | return true; |
| 1480 | } |
| 1481 | |
| 1482 | boolean result; |
| 1483 | int srcWidth = img.getWidth(null); |
| 1484 | int srcHeight = img.getHeight(null); |
| 1485 | |
| 1486 | if (srcWidth < 0 || srcHeight < 0) { |
| 1487 | result = false; |
| 1488 | } else { |
| 1489 | result = drawImage(img, x, y, srcWidth, srcHeight, bgcolor, observer); |
| 1490 | } |
| 1491 | |
| 1492 | return result; |
| 1493 | } |
| 1494 | |
| 1495 | /** |
| 1496 | * Draws as much of the specified image as has already been scaled |
| 1497 | * to fit inside the specified rectangle. |
| 1498 | * <p> |
| 1499 | * The image is drawn inside the specified rectangle of this |
| 1500 | * graphics context's coordinate space, and is scaled if |
| 1501 | * necessary. Transparent pixels are drawn in the specified |
| 1502 | * background color. |
| 1503 | * This operation is equivalent to filling a rectangle of the |
| 1504 | * width and height of the specified image with the given color and then |
| 1505 | * drawing the image on top of it, but possibly more efficient. |
| 1506 | * <p> |
| 1507 | * This method returns immediately in all cases, even if the |
| 1508 | * entire image has not yet been scaled, dithered, and converted |
| 1509 | * for the current output device. |
| 1510 | * If the current output representation is not yet complete then |
| 1511 | * <code>drawImage</code> returns <code>false</code>. As more of |
| 1512 | * the image becomes available, the process that draws the image notifies |
| 1513 | * the specified image observer. |
| 1514 | * <p> |
| 1515 | * A scaled version of an image will not necessarily be |
| 1516 | * available immediately just because an unscaled version of the |
| 1517 | * image has been constructed for this output device. Each size of |
| 1518 | * the image may be cached separately and generated from the original |
| 1519 | * data in a separate image production sequence. |
| 1520 | * @param img the specified image to be drawn. |
| 1521 | * This method does nothing if <code>img</code> is null. |
| 1522 | * @param x the <i>x</i> coordinate. |
| 1523 | * @param y the <i>y</i> coordinate. |
| 1524 | * @param width the width of the rectangle. |
| 1525 | * @param height the height of the rectangle. |
| 1526 | * @param bgcolor the background color to paint under the |
| 1527 | * non-opaque portions of the image. |
| 1528 | * @param observer object to be notified as more of |
| 1529 | * the image is converted. |
| 1530 | * @see java.awt.Image |
| 1531 | * @see java.awt.image.ImageObserver |
| 1532 | * @see java.awt.image.ImageObserver#imageUpdate(java.awt.Image, int, int, int, int, int) |
| 1533 | * @since JDK1.0 |
| 1534 | */ |
| 1535 | public boolean drawImage(Image img, int x, int y, |
| 1536 | int width, int height, |
| 1537 | Color bgcolor, |
| 1538 | ImageObserver observer) { |
| 1539 | |
| 1540 | if (img == null) { |
| 1541 | return true; |
| 1542 | } |
| 1543 | |
| 1544 | boolean result; |
| 1545 | int srcWidth = img.getWidth(null); |
| 1546 | int srcHeight = img.getHeight(null); |
| 1547 | |
| 1548 | if (srcWidth < 0 || srcHeight < 0) { |
| 1549 | result = false; |
| 1550 | } else { |
| 1551 | result = drawImage(img, |
| 1552 | x, y, x + width, y + height, |
| 1553 | 0, 0, srcWidth, srcHeight, |
| 1554 | observer); |
| 1555 | } |
| 1556 | |
| 1557 | return result; |
| 1558 | } |
| 1559 | |
| 1560 | /** |
| 1561 | * Draws as much of the specified area of the specified image as is |
| 1562 | * currently available, scaling it on the fly to fit inside the |
| 1563 | * specified area of the destination drawable surface. Transparent pixels |
| 1564 | * do not affect whatever pixels are already there. |
| 1565 | * <p> |
| 1566 | * This method returns immediately in all cases, even if the |
| 1567 | * image area to be drawn has not yet been scaled, dithered, and converted |
| 1568 | * for the current output device. |
| 1569 | * If the current output representation is not yet complete then |
| 1570 | * <code>drawImage</code> returns <code>false</code>. As more of |
| 1571 | * the image becomes available, the process that draws the image notifies |
| 1572 | * the specified image observer. |
| 1573 | * <p> |
| 1574 | * This method always uses the unscaled version of the image |
| 1575 | * to render the scaled rectangle and performs the required |
| 1576 | * scaling on the fly. It does not use a cached, scaled version |
| 1577 | * of the image for this operation. Scaling of the image from source |
| 1578 | * to destination is performed such that the first coordinate |
| 1579 | * of the source rectangle is mapped to the first coordinate of |
| 1580 | * the destination rectangle, and the second source coordinate is |
| 1581 | * mapped to the second destination coordinate. The subimage is |
| 1582 | * scaled and flipped as needed to preserve those mappings. |
| 1583 | * @param img the specified image to be drawn |
| 1584 | * @param dx1 the <i>x</i> coordinate of the first corner of the |
| 1585 | * destination rectangle. |
| 1586 | * @param dy1 the <i>y</i> coordinate of the first corner of the |
| 1587 | * destination rectangle. |
| 1588 | * @param dx2 the <i>x</i> coordinate of the second corner of the |
| 1589 | * destination rectangle. |
| 1590 | * @param dy2 the <i>y</i> coordinate of the second corner of the |
| 1591 | * destination rectangle. |
| 1592 | * @param sx1 the <i>x</i> coordinate of the first corner of the |
| 1593 | * source rectangle. |
| 1594 | * @param sy1 the <i>y</i> coordinate of the first corner of the |
| 1595 | * source rectangle. |
| 1596 | * @param sx2 the <i>x</i> coordinate of the second corner of the |
| 1597 | * source rectangle. |
| 1598 | * @param sy2 the <i>y</i> coordinate of the second corner of the |
| 1599 | * source rectangle. |
| 1600 | * @param observer object to be notified as more of the image is |
| 1601 | * scaled and converted. |
| 1602 | * @see java.awt.Image |
| 1603 | * @see java.awt.image.ImageObserver |
| 1604 | * @see java.awt.image.ImageObserver#imageUpdate(java.awt.Image, int, int, int, int, int) |
| 1605 | * @since JDK1.1 |
| 1606 | */ |
| 1607 | public boolean drawImage(Image img, |
| 1608 | int dx1, int dy1, int dx2, int dy2, |
| 1609 | int sx1, int sy1, int sx2, int sy2, |
| 1610 | ImageObserver observer) { |
| 1611 | |
| 1612 | return drawImage(img, |
| 1613 | dx1, dy1, dx2, dy2, |
| 1614 | sx1, sy1, sx2, sy2, |
| 1615 | null, observer); |
| 1616 | } |
| 1617 | |
| 1618 | /** |
| 1619 | * Draws as much of the specified area of the specified image as is |
| 1620 | * currently available, scaling it on the fly to fit inside the |
| 1621 | * specified area of the destination drawable surface. |
| 1622 | * <p> |
| 1623 | * Transparent pixels are drawn in the specified background color. |
| 1624 | * This operation is equivalent to filling a rectangle of the |
| 1625 | * width and height of the specified image with the given color and then |
| 1626 | * drawing the image on top of it, but possibly more efficient. |
| 1627 | * <p> |
| 1628 | * This method returns immediately in all cases, even if the |
| 1629 | * image area to be drawn has not yet been scaled, dithered, and converted |
| 1630 | * for the current output device. |
| 1631 | * If the current output representation is not yet complete then |
| 1632 | * <code>drawImage</code> returns <code>false</code>. As more of |
| 1633 | * the image becomes available, the process that draws the image notifies |
| 1634 | * the specified image observer. |
| 1635 | * <p> |
| 1636 | * This method always uses the unscaled version of the image |
| 1637 | * to render the scaled rectangle and performs the required |
| 1638 | * scaling on the fly. It does not use a cached, scaled version |
| 1639 | * of the image for this operation. Scaling of the image from source |
| 1640 | * to destination is performed such that the first coordinate |
| 1641 | * of the source rectangle is mapped to the first coordinate of |
| 1642 | * the destination rectangle, and the second source coordinate is |
| 1643 | * mapped to the second destination coordinate. The subimage is |
| 1644 | * scaled and flipped as needed to preserve those mappings. |
| 1645 | * @param img the specified image to be drawn |
| 1646 | * This method does nothing if <code>img</code> is null. |
| 1647 | * @param dx1 the <i>x</i> coordinate of the first corner of the |
| 1648 | * destination rectangle. |
| 1649 | * @param dy1 the <i>y</i> coordinate of the first corner of the |
| 1650 | * destination rectangle. |
| 1651 | * @param dx2 the <i>x</i> coordinate of the second corner of the |
| 1652 | * destination rectangle. |
| 1653 | * @param dy2 the <i>y</i> coordinate of the second corner of the |
| 1654 | * destination rectangle. |
| 1655 | * @param sx1 the <i>x</i> coordinate of the first corner of the |
| 1656 | * source rectangle. |
| 1657 | * @param sy1 the <i>y</i> coordinate of the first corner of the |
| 1658 | * source rectangle. |
| 1659 | * @param sx2 the <i>x</i> coordinate of the second corner of the |
| 1660 | * source rectangle. |
| 1661 | * @param sy2 the <i>y</i> coordinate of the second corner of the |
| 1662 | * source rectangle. |
| 1663 | * @param bgcolor the background color to paint under the |
| 1664 | * non-opaque portions of the image. |
| 1665 | * @param observer object to be notified as more of the image is |
| 1666 | * scaled and converted. |
| 1667 | * @see java.awt.Image |
| 1668 | * @see java.awt.image.ImageObserver |
| 1669 | * @see java.awt.image.ImageObserver#imageUpdate(java.awt.Image, int, int, int, int, int) |
| 1670 | * @since JDK1.1 |
| 1671 | */ |
| 1672 | public boolean drawImage(Image img, |
| 1673 | int dx1, int dy1, int dx2, int dy2, |
| 1674 | int sx1, int sy1, int sx2, int sy2, |
| 1675 | Color bgcolor, |
| 1676 | ImageObserver observer) { |
| 1677 | |
| 1678 | if (img == null) { |
| 1679 | return true; |
| 1680 | } |
| 1681 | int imgWidth = img.getWidth(null); |
| 1682 | int imgHeight = img.getHeight(null); |
| 1683 | |
| 1684 | if (imgWidth < 0 || imgHeight < 0) { |
| 1685 | return true; |
| 1686 | } |
| 1687 | |
| 1688 | int srcWidth = sx2 - sx1; |
| 1689 | int srcHeight = sy2 - sy1; |
| 1690 | |
| 1691 | /* Create a transform which describes the changes |
| 1692 | * from the source coordinates to the destination |
| 1693 | * coordinates. The scaling is determined by the |
| 1694 | * ratio of the two rectangles, while the translation |
| 1695 | * comes from the difference of their origins. |
| 1696 | */ |
| 1697 | float scalex = (float) (dx2 - dx1) / srcWidth; |
| 1698 | float scaley = (float) (dy2 - dy1) / srcHeight; |
| 1699 | AffineTransform xForm |
| 1700 | = new AffineTransform(scalex, |
| 1701 | 0, |
| 1702 | 0, |
| 1703 | scaley, |
| 1704 | dx1 - (sx1 * scalex), |
| 1705 | dy1 - (sy1 * scaley)); |
| 1706 | |
| 1707 | /* drawImageToPlatform needs the top-left of the source area and |
| 1708 | * a positive width and height. The xform describes how to map |
| 1709 | * src->dest, so that information is not lost. |
| 1710 | */ |
| 1711 | int tmp=0; |
| 1712 | if (sx2 < sx1) { |
| 1713 | tmp = sx1; |
| 1714 | sx1 = sx2; |
| 1715 | sx2 = tmp; |
| 1716 | } |
| 1717 | if (sy2 < sy1) { |
| 1718 | tmp = sy1; |
| 1719 | sy1 = sy2; |
| 1720 | sy2 = tmp; |
| 1721 | } |
| 1722 | |
| 1723 | /* if src area is beyond the bounds of the image, we must clip it. |
| 1724 | * The transform is based on the specified area, not the clipped one. |
| 1725 | */ |
| 1726 | if (sx1 < 0) { |
| 1727 | sx1 = 0; |
| 1728 | } else if (sx1 > imgWidth) { // empty srcArea, nothing to draw |
| 1729 | sx1 = imgWidth; |
| 1730 | } |
| 1731 | if (sx2 < 0) { // empty srcArea, nothing to draw |
| 1732 | sx2 = 0; |
| 1733 | } else if (sx2 > imgWidth) { |
| 1734 | sx2 = imgWidth; |
| 1735 | } |
| 1736 | if (sy1 < 0) { |
| 1737 | sy1 = 0; |
| 1738 | } else if (sy1 > imgHeight) { // empty srcArea |
| 1739 | sy1 = imgHeight; |
| 1740 | } |
| 1741 | if (sy2 < 0) { // empty srcArea |
| 1742 | sy2 = 0; |
| 1743 | } else if (sy2 > imgHeight) { |
| 1744 | sy2 = imgHeight; |
| 1745 | } |
| 1746 | |
| 1747 | srcWidth = sx2 - sx1; |
| 1748 | srcHeight = sy2 - sy1; |
| 1749 | |
| 1750 | if (srcWidth <= 0 || srcHeight <= 0) { |
| 1751 | return true; |
| 1752 | } |
| 1753 | |
| 1754 | return drawImageToPlatform(img, xForm, bgcolor, |
| 1755 | sx1, sy1, srcWidth, srcHeight, false); |
| 1756 | |
| 1757 | |
| 1758 | } |
| 1759 | |
| 1760 | /** |
| 1761 | * Draws an image, applying a transform from image space into user space |
| 1762 | * before drawing. |
| 1763 | * The transformation from user space into device space is done with |
| 1764 | * the current transform in the Graphics2D. |
| 1765 | * The given transformation is applied to the image before the |
| 1766 | * transform attribute in the Graphics2D state is applied. |
| 1767 | * The rendering attributes applied include the clip, transform, |
| 1768 | * and composite attributes. Note that the result is |
| 1769 | * undefined, if the given transform is noninvertible. |
| 1770 | * @param img The image to be drawn. |
| 1771 | * This method does nothing if <code>img</code> is null. |
| 1772 | * @param xform The transformation from image space into user space. |
| 1773 | * @param obs The image observer to be notified as more of the image |
| 1774 | * is converted. |
| 1775 | * @see #transform |
| 1776 | * @see #setTransform |
| 1777 | * @see #setComposite |
| 1778 | * @see #clip |
| 1779 | * @see #setClip |
| 1780 | */ |
| 1781 | public boolean drawImage(Image img, |
| 1782 | AffineTransform xform, |
| 1783 | ImageObserver obs) { |
| 1784 | |
| 1785 | if (img == null) { |
| 1786 | return true; |
| 1787 | } |
| 1788 | |
| 1789 | boolean result; |
| 1790 | int srcWidth = img.getWidth(null); |
| 1791 | int srcHeight = img.getHeight(null); |
| 1792 | |
| 1793 | if (srcWidth < 0 || srcHeight < 0) { |
| 1794 | result = false; |
| 1795 | } else { |
| 1796 | result = drawImageToPlatform(img, xform, null, |
| 1797 | 0, 0, srcWidth, srcHeight, false); |
| 1798 | } |
| 1799 | |
| 1800 | return result; |
| 1801 | } |
| 1802 | |
| 1803 | /** |
| 1804 | * Draws a BufferedImage that is filtered with a BufferedImageOp. |
| 1805 | * The rendering attributes applied include the clip, transform |
| 1806 | * and composite attributes. This is equivalent to: |
| 1807 | * <pre> |
| 1808 | * img1 = op.filter(img, null); |
| 1809 | * drawImage(img1, new AffineTransform(1f,0f,0f,1f,x,y), null); |
| 1810 | * </pre> |
| 1811 | * @param op The filter to be applied to the image before drawing. |
| 1812 | * @param img The BufferedImage to be drawn. |
| 1813 | * This method does nothing if <code>img</code> is null. |
| 1814 | * @param x,y The location in user space where the image should be drawn. |
| 1815 | * @see #transform |
| 1816 | * @see #setTransform |
| 1817 | * @see #setComposite |
| 1818 | * @see #clip |
| 1819 | * @see #setClip |
| 1820 | */ |
| 1821 | public void drawImage(BufferedImage img, |
| 1822 | BufferedImageOp op, |
| 1823 | int x, |
| 1824 | int y) { |
| 1825 | |
| 1826 | if (img == null) { |
| 1827 | return; |
| 1828 | } |
| 1829 | |
| 1830 | int srcWidth = img.getWidth(null); |
| 1831 | int srcHeight = img.getHeight(null); |
| 1832 | |
| 1833 | if (op != null) { |
| 1834 | img = op.filter(img, null); |
| 1835 | } |
| 1836 | if (srcWidth <= 0 || srcHeight <= 0) { |
| 1837 | return; |
| 1838 | } else { |
| 1839 | AffineTransform xform = new AffineTransform(1f,0f,0f,1f,x,y); |
| 1840 | drawImageToPlatform(img, xform, null, |
| 1841 | 0, 0, srcWidth, srcHeight, false); |
| 1842 | } |
| 1843 | |
| 1844 | } |
| 1845 | |
| 1846 | /** |
| 1847 | * Draws an image, applying a transform from image space into user space |
| 1848 | * before drawing. |
| 1849 | * The transformation from user space into device space is done with |
| 1850 | * the current transform in the Graphics2D. |
| 1851 | * The given transformation is applied to the image before the |
| 1852 | * transform attribute in the Graphics2D state is applied. |
| 1853 | * The rendering attributes applied include the clip, transform, |
| 1854 | * and composite attributes. Note that the result is |
| 1855 | * undefined, if the given transform is noninvertible. |
| 1856 | * @param img The image to be drawn. |
| 1857 | * This method does nothing if <code>img</code> is null. |
| 1858 | * @param xform The transformation from image space into user space. |
| 1859 | * @see #transform |
| 1860 | * @see #setTransform |
| 1861 | * @see #setComposite |
| 1862 | * @see #clip |
| 1863 | * @see #setClip |
| 1864 | */ |
| 1865 | public void drawRenderedImage(RenderedImage img, |
| 1866 | AffineTransform xform) { |
| 1867 | |
| 1868 | if (img == null) { |
| 1869 | return; |
| 1870 | } |
| 1871 | |
| 1872 | BufferedImage bufferedImage = null; |
| 1873 | int srcWidth = img.getWidth(); |
| 1874 | int srcHeight = img.getHeight(); |
| 1875 | |
| 1876 | if (srcWidth <= 0 || srcHeight <= 0) { |
| 1877 | return; |
| 1878 | } |
| 1879 | |
| 1880 | if (img instanceof BufferedImage) { |
| 1881 | bufferedImage = (BufferedImage) img; |
| 1882 | } else { |
| 1883 | bufferedImage = new BufferedImage(srcWidth, srcHeight, |
| 1884 | BufferedImage.TYPE_INT_ARGB); |
| 1885 | Graphics2D imageGraphics = bufferedImage.createGraphics(); |
| 1886 | imageGraphics.drawRenderedImage(img, xform); |
| 1887 | } |
| 1888 | |
| 1889 | drawImageToPlatform(bufferedImage, xform, null, |
| 1890 | 0, 0, srcWidth, srcHeight, false); |
| 1891 | |
| 1892 | } |
| 1893 | |
| 1894 | } |