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| 1 | +/* | |
| 2 | + * Copyright (c) 2008, 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.pipe; | |
| 27 | + | |
| 28 | +import java.awt.Shape; | |
| 29 | +import java.awt.BasicStroke; | |
| 30 | +import java.awt.geom.Line2D; | |
| 31 | +import java.awt.geom.Rectangle2D; | |
| 32 | +import java.awt.geom.AffineTransform; | |
| 33 | +import sun.java2d.SunGraphics2D; | |
| 34 | +import sun.awt.SunHints; | |
| 35 | + | |
| 36 | +/** | |
| 37 | + * This class converts calls to the basic pixel rendering methods | |
| 38 | + * into calls to the methods on a ParallelogramPipe. | |
| 39 | + * Most calls are transformed into calls to the fill(Shape) method | |
| 40 | + * by the parent PixelToShapeConverter class, but some calls are | |
| 41 | + * transformed into calls to fill/drawParallelogram(). | |
| 42 | + */ | |
| 43 | +public class PixelToParallelogramConverter extends PixelToShapeConverter | |
| 44 | + implements ShapeDrawPipe | |
| 45 | +{ | |
| 46 | + ParallelogramPipe outrenderer; | |
| 47 | + double minPenSize; | |
| 48 | + double normPosition; | |
| 49 | + double normRoundingBias; | |
| 50 | + boolean adjustfill; | |
| 51 | + | |
| 52 | + /** | |
| 53 | + * @param shapepipe pipeline to forward shape calls to | |
| 54 | + * @param pgrampipe pipeline to forward parallelogram calls to | |
| 55 | + * (and drawLine calls if possible) | |
| 56 | + * @param minPenSize minimum pen size for dropout control | |
| 57 | + * @param normPosition sub-pixel location to normalize endpoints | |
| 58 | + * for STROKE_NORMALIZE cases | |
| 59 | + * @param adjustFill boolean to control whethere normalization | |
| 60 | + * constants are also applied to fill operations | |
| 61 | + * (normally true for non-AA, false for AA) | |
| 62 | + */ | |
| 63 | + public PixelToParallelogramConverter(ShapeDrawPipe shapepipe, | |
| 64 | + ParallelogramPipe pgrampipe, | |
| 65 | + double minPenSize, | |
| 66 | + double normPosition, | |
| 67 | + boolean adjustfill) | |
| 68 | + { | |
| 69 | + super(shapepipe); | |
| 70 | + outrenderer = pgrampipe; | |
| 71 | + this.minPenSize = minPenSize; | |
| 72 | + this.normPosition = normPosition; | |
| 73 | + this.normRoundingBias = 0.5 - normPosition; | |
| 74 | + this.adjustfill = adjustfill; | |
| 75 | + } | |
| 76 | + | |
| 77 | + public void drawLine(SunGraphics2D sg2d, | |
| 78 | + int x1, int y1, int x2, int y2) | |
| 79 | + { | |
| 80 | + if (!drawGeneralLine(sg2d, x1, y1, x2, y2)) { | |
| 81 | + super.drawLine(sg2d, x1, y1, x2, y2); | |
| 82 | + } | |
| 83 | + } | |
| 84 | + | |
| 85 | + public void drawRect(SunGraphics2D sg2d, | |
| 86 | + int x, int y, int w, int h) | |
| 87 | + { | |
| 88 | + if (w >= 0 && h >= 0) { | |
| 89 | + if (sg2d.strokeState < SunGraphics2D.STROKE_CUSTOM) { | |
| 90 | + BasicStroke bs = ((BasicStroke) sg2d.stroke); | |
| 91 | + if (w > 0 && h > 0) { | |
| 92 | + if (bs.getLineJoin() == BasicStroke.JOIN_MITER && | |
| 93 | + bs.getDashArray() == null) | |
| 94 | + { | |
| 95 | + double lw = bs.getLineWidth(); | |
| 96 | + drawRectangle(sg2d, x, y, w, h, lw); | |
| 97 | + return; | |
| 98 | + } | |
| 99 | + } else { | |
| 100 | + // Note: This calls the integer version which | |
| 101 | + // will verify that the local drawLine optimizations | |
| 102 | + // work and call super.drawLine(), if not. | |
| 103 | + drawLine(sg2d, x, y, x+w, y+h); | |
| 104 | + return; | |
| 105 | + } | |
| 106 | + } | |
| 107 | + super.drawRect(sg2d, x, y, w, h); | |
| 108 | + } | |
| 109 | + } | |
| 110 | + | |
| 111 | + public void fillRect(SunGraphics2D sg2d, | |
| 112 | + int x, int y, int w, int h) | |
| 113 | + { | |
| 114 | + if (w > 0 && h > 0) { | |
| 115 | + fillRectangle(sg2d, x, y, w, h); | |
| 116 | + } | |
| 117 | + } | |
| 118 | + | |
| 119 | + public void draw(SunGraphics2D sg2d, Shape s) { | |
| 120 | + if (sg2d.strokeState < SunGraphics2D.STROKE_CUSTOM) { | |
| 121 | + BasicStroke bs = ((BasicStroke) sg2d.stroke); | |
| 122 | + if (s instanceof Rectangle2D) { | |
| 123 | + if (bs.getLineJoin() == BasicStroke.JOIN_MITER && | |
| 124 | + bs.getDashArray() == null) | |
| 125 | + { | |
| 126 | + Rectangle2D r2d = (Rectangle2D) s; | |
| 127 | + double w = r2d.getWidth(); | |
| 128 | + double h = r2d.getHeight(); | |
| 129 | + double x = r2d.getX(); | |
| 130 | + double y = r2d.getY(); | |
| 131 | + if (w >= 0 && h >= 0) { | |
| 132 | + double lw = bs.getLineWidth(); | |
| 133 | + drawRectangle(sg2d, x, y, w, h, lw); | |
| 134 | + } | |
| 135 | + return; | |
| 136 | + } | |
| 137 | + } else if (s instanceof Line2D) { | |
| 138 | + Line2D l2d = (Line2D) s; | |
| 139 | + if (drawGeneralLine(sg2d, | |
| 140 | + l2d.getX1(), l2d.getY1(), | |
| 141 | + l2d.getX2(), l2d.getY2())) | |
| 142 | + { | |
| 143 | + return; | |
| 144 | + } | |
| 145 | + } | |
| 146 | + } | |
| 147 | + | |
| 148 | + outpipe.draw(sg2d, s); | |
| 149 | + } | |
| 150 | + | |
| 151 | + public void fill(SunGraphics2D sg2d, Shape s) { | |
| 152 | + if (s instanceof Rectangle2D) { | |
| 153 | + Rectangle2D r2d = (Rectangle2D) s; | |
| 154 | + double w = r2d.getWidth(); | |
| 155 | + double h = r2d.getHeight(); | |
| 156 | + if (w > 0 && h > 0) { | |
| 157 | + double x = r2d.getX(); | |
| 158 | + double y = r2d.getY(); | |
| 159 | + fillRectangle(sg2d, x, y, w, h); | |
| 160 | + } | |
| 161 | + return; | |
| 162 | + } | |
| 163 | + | |
| 164 | + outpipe.fill(sg2d, s); | |
| 165 | + } | |
| 166 | + | |
| 167 | + static double len(double x, double y) { | |
| 168 | + return ((x == 0) ? Math.abs(y) | |
| 169 | + : ((y == 0) ? Math.abs(x) | |
| 170 | + : Math.sqrt(x * x + y * y))); | |
| 171 | + } | |
| 172 | + | |
| 173 | + double normalize(double v) { | |
| 174 | + return Math.floor(v + normRoundingBias) + normPosition; | |
| 175 | + } | |
| 176 | + | |
| 177 | + public boolean drawGeneralLine(SunGraphics2D sg2d, | |
| 178 | + double ux1, double uy1, | |
| 179 | + double ux2, double uy2) | |
| 180 | + { | |
| 181 | + if (sg2d.strokeState == SunGraphics2D.STROKE_CUSTOM || | |
| 182 | + sg2d.strokeState == SunGraphics2D.STROKE_THINDASHED) | |
| 183 | + { | |
| 184 | + return false; | |
| 185 | + } | |
| 186 | + BasicStroke bs = (BasicStroke) sg2d.stroke; | |
| 187 | + int cap = bs.getEndCap(); | |
| 188 | + if (cap == BasicStroke.CAP_ROUND || bs.getDashArray() != null) { | |
| 189 | + // TODO: we could construct the GeneralPath directly | |
| 190 | + // for CAP_ROUND and save a lot of processing in that case... | |
| 191 | + // And again, we would need to deal with dropout control... | |
| 192 | + return false; | |
| 193 | + } | |
| 194 | + double lw = bs.getLineWidth(); | |
| 195 | + // Save the original dx, dy in case we need it to transform | |
| 196 | + // the linewidth as a perpendicular vector below | |
| 197 | + double dx = ux2 - ux1; | |
| 198 | + double dy = uy2 - uy1; | |
| 199 | + double x1, y1, x2, y2; | |
| 200 | + switch (sg2d.transformState) { | |
| 201 | + case SunGraphics2D.TRANSFORM_GENERIC: | |
| 202 | + case SunGraphics2D.TRANSFORM_TRANSLATESCALE: | |
| 203 | + { | |
| 204 | + double coords[] = {ux1, uy1, ux2, uy2}; | |
| 205 | + sg2d.transform.transform(coords, 0, coords, 0, 2); | |
| 206 | + x1 = coords[0]; | |
| 207 | + y1 = coords[1]; | |
| 208 | + x2 = coords[2]; | |
| 209 | + y2 = coords[3]; | |
| 210 | + } | |
| 211 | + break; | |
| 212 | + case SunGraphics2D.TRANSFORM_ANY_TRANSLATE: | |
| 213 | + case SunGraphics2D.TRANSFORM_INT_TRANSLATE: | |
| 214 | + { | |
| 215 | + double tx = sg2d.transform.getTranslateX(); | |
| 216 | + double ty = sg2d.transform.getTranslateY(); | |
| 217 | + x1 = ux1 + tx; | |
| 218 | + y1 = uy1 + ty; | |
| 219 | + x2 = ux2 + tx; | |
| 220 | + y2 = uy2 + ty; | |
| 221 | + } | |
| 222 | + break; | |
| 223 | + case SunGraphics2D.TRANSFORM_ISIDENT: | |
| 224 | + x1 = ux1; | |
| 225 | + y1 = uy1; | |
| 226 | + x2 = ux2; | |
| 227 | + y2 = uy2; | |
| 228 | + break; | |
| 229 | + default: | |
| 230 | + throw new InternalError("unknown TRANSFORM state..."); | |
| 231 | + } | |
| 232 | + if (sg2d.strokeHint != SunHints.INTVAL_STROKE_PURE) { | |
| 233 | + if (sg2d.strokeState == SunGraphics2D.STROKE_THIN && | |
| 234 | + outrenderer instanceof PixelDrawPipe) | |
| 235 | + { | |
| 236 | + // PixelDrawPipes will add sg2d.transXY so we need to factor | |
| 237 | + // that out... | |
| 238 | + int ix1 = (int) Math.floor(x1 - sg2d.transX); | |
| 239 | + int iy1 = (int) Math.floor(y1 - sg2d.transY); | |
| 240 | + int ix2 = (int) Math.floor(x2 - sg2d.transX); | |
| 241 | + int iy2 = (int) Math.floor(y2 - sg2d.transY); | |
| 242 | + ((PixelDrawPipe)outrenderer).drawLine(sg2d, ix1, iy1, ix2, iy2); | |
| 243 | + return true; | |
| 244 | + } | |
| 245 | + x1 = normalize(x1); | |
| 246 | + y1 = normalize(y1); | |
| 247 | + x2 = normalize(x2); | |
| 248 | + y2 = normalize(y2); | |
| 249 | + } | |
| 250 | + if (sg2d.transformState >= SunGraphics2D.TRANSFORM_TRANSLATESCALE) { | |
| 251 | + // Transform the linewidth... | |
| 252 | + // calculate the scaling factor for a unit vector | |
| 253 | + // perpendicular to the original user space line. | |
| 254 | + double len = len(dx, dy); | |
| 255 | + if (len == 0) { | |
| 256 | + dx = len = 1; | |
| 257 | + // dy = 0; already | |
| 258 | + } | |
| 259 | + // delta transform the transposed (90 degree rotated) unit vector | |
| 260 | + double unitvector[] = {dy/len, -dx/len}; | |
| 261 | + sg2d.transform.deltaTransform(unitvector, 0, unitvector, 0, 1); | |
| 262 | + lw *= len(unitvector[0], unitvector[1]); | |
| 263 | + } | |
| 264 | + lw = Math.max(lw, minPenSize); | |
| 265 | + dx = x2 - x1; | |
| 266 | + dy = y2 - y1; | |
| 267 | + double len = len(dx, dy); | |
| 268 | + double udx, udy; | |
| 269 | + if (len == 0) { | |
| 270 | + if (cap == BasicStroke.CAP_BUTT) { | |
| 271 | + return true; | |
| 272 | + } | |
| 273 | + udx = lw; | |
| 274 | + udy = 0; | |
| 275 | + } else { | |
| 276 | + udx = lw * dx / len; | |
| 277 | + udy = lw * dy / len; | |
| 278 | + } | |
| 279 | + double px = x1 + udy / 2.0; | |
| 280 | + double py = y1 - udx / 2.0; | |
| 281 | + if (cap == BasicStroke.CAP_SQUARE) { | |
| 282 | + px -= udx / 2.0; | |
| 283 | + py -= udy / 2.0; | |
| 284 | + dx += udx; | |
| 285 | + dy += udy; | |
| 286 | + } | |
| 287 | + outrenderer.fillParallelogram(sg2d, ux1, uy1, ux2, uy2, | |
| 288 | + px, py, -udy, udx, dx, dy); | |
| 289 | + return true; | |
| 290 | + } | |
| 291 | + | |
| 292 | + public void fillRectangle(SunGraphics2D sg2d, | |
| 293 | + double rx, double ry, | |
| 294 | + double rw, double rh) | |
| 295 | + { | |
| 296 | + double px, py; | |
| 297 | + double dx1, dy1, dx2, dy2; | |
| 298 | + AffineTransform txform = sg2d.transform; | |
| 299 | + dx1 = txform.getScaleX(); | |
| 300 | + dy1 = txform.getShearY(); | |
| 301 | + dx2 = txform.getShearX(); | |
| 302 | + dy2 = txform.getScaleY(); | |
| 303 | + px = rx * dx1 + ry * dx2 + txform.getTranslateX(); | |
| 304 | + py = rx * dy1 + ry * dy2 + txform.getTranslateY(); | |
| 305 | + dx1 *= rw; | |
| 306 | + dy1 *= rw; | |
| 307 | + dx2 *= rh; | |
| 308 | + dy2 *= rh; | |
| 309 | + if (adjustfill && | |
| 310 | + sg2d.strokeState < SunGraphics2D.STROKE_CUSTOM && | |
| 311 | + sg2d.strokeHint != SunHints.INTVAL_STROKE_PURE) | |
| 312 | + { | |
| 313 | + double newx = normalize(px); | |
| 314 | + double newy = normalize(py); | |
| 315 | + dx1 = normalize(px + dx1) - newx; | |
| 316 | + dy1 = normalize(py + dy1) - newy; | |
| 317 | + dx2 = normalize(px + dx2) - newx; | |
| 318 | + dy2 = normalize(py + dy2) - newy; | |
| 319 | + px = newx; | |
| 320 | + py = newy; | |
| 321 | + } | |
| 322 | + outrenderer.fillParallelogram(sg2d, rx, ry, rx+rw, ry+rh, | |
| 323 | + px, py, dx1, dy1, dx2, dy2); | |
| 324 | + } | |
| 325 | + | |
| 326 | + public void drawRectangle(SunGraphics2D sg2d, | |
| 327 | + double rx, double ry, | |
| 328 | + double rw, double rh, | |
| 329 | + double lw) | |
| 330 | + { | |
| 331 | + double px, py; | |
| 332 | + double dx1, dy1, dx2, dy2; | |
| 333 | + double lw1, lw2; | |
| 334 | + AffineTransform txform = sg2d.transform; | |
| 335 | + dx1 = txform.getScaleX(); | |
| 336 | + dy1 = txform.getShearY(); | |
| 337 | + dx2 = txform.getShearX(); | |
| 338 | + dy2 = txform.getScaleY(); | |
| 339 | + px = rx * dx1 + ry * dx2 + txform.getTranslateX(); | |
| 340 | + py = rx * dy1 + ry * dy2 + txform.getTranslateY(); | |
| 341 | + // lw along dx1,dy1 scale by transformed length of dx2,dy2 vectors | |
| 342 | + // and vice versa | |
| 343 | + lw1 = len(dx1, dy1) * lw; | |
| 344 | + lw2 = len(dx2, dy2) * lw; | |
| 345 | + dx1 *= rw; | |
| 346 | + dy1 *= rw; | |
| 347 | + dx2 *= rh; | |
| 348 | + dy2 *= rh; | |
| 349 | + if (sg2d.strokeState < SunGraphics2D.STROKE_CUSTOM && | |
| 350 | + sg2d.strokeHint != SunHints.INTVAL_STROKE_PURE) | |
| 351 | + { | |
| 352 | + double newx = normalize(px); | |
| 353 | + double newy = normalize(py); | |
| 354 | + dx1 = normalize(px + dx1) - newx; | |
| 355 | + dy1 = normalize(py + dy1) - newy; | |
| 356 | + dx2 = normalize(px + dx2) - newx; | |
| 357 | + dy2 = normalize(py + dy2) - newy; | |
| 358 | + px = newx; | |
| 359 | + py = newy; | |
| 360 | + } | |
| 361 | + lw1 = Math.max(lw1, minPenSize); | |
| 362 | + lw2 = Math.max(lw2, minPenSize); | |
| 363 | + double len1 = len(dx1, dy1); | |
| 364 | + double len2 = len(dx2, dy2); | |
| 365 | + if (lw1 >= len1 || lw2 >= len2) { | |
| 366 | + // The line widths are large enough to consume the | |
| 367 | + // entire hole in the middle of the parallelogram | |
| 368 | + // so we can just fill the outer parallelogram. | |
| 369 | + fillOuterParallelogram(sg2d, | |
| 370 | + rx, ry, rx+rw, ry+rh, | |
| 371 | + px, py, dx1, dy1, dx2, dy2, | |
| 372 | + len1, len2, lw1, lw2); | |
| 373 | + } else { | |
| 374 | + outrenderer.drawParallelogram(sg2d, | |
| 375 | + rx, ry, rx+rw, ry+rh, | |
| 376 | + px, py, dx1, dy1, dx2, dy2, | |
| 377 | + lw1 / len1, lw2 / len2); | |
| 378 | + } | |
| 379 | + } | |
| 380 | + | |
| 381 | + /** | |
| 382 | + * This utility function handles the case where a drawRectangle | |
| 383 | + * operation discovered that the interior hole in the rectangle | |
| 384 | + * or parallelogram has been completely filled in by the stroke | |
| 385 | + * width. It calculates the outer parallelogram of the stroke | |
| 386 | + * and issues a single fillParallelogram request to fill it. | |
| 387 | + */ | |
| 388 | + public void fillOuterParallelogram(SunGraphics2D sg2d, | |
| 389 | + double ux1, double uy1, | |
| 390 | + double ux2, double uy2, | |
| 391 | + double px, double py, | |
| 392 | + double dx1, double dy1, | |
| 393 | + double dx2, double dy2, | |
| 394 | + double len1, double len2, | |
| 395 | + double lw1, double lw2) | |
| 396 | + { | |
| 397 | + double udx1 = dx1 / len1; | |
| 398 | + double udy1 = dy1 / len1; | |
| 399 | + double udx2 = dx2 / len2; | |
| 400 | + double udy2 = dy2 / len2; | |
| 401 | + if (len1 == 0) { | |
| 402 | + // len1 is 0, replace udxy1 with perpendicular of udxy2 | |
| 403 | + if (len2 == 0) { | |
| 404 | + // both are 0, use a unit Y vector for udxy2 | |
| 405 | + udx2 = 0; | |
| 406 | + udy2 = 1; | |
| 407 | + } | |
| 408 | + udx1 = udy2; | |
| 409 | + udy1 = -udx2; | |
| 410 | + } else if (len2 == 0) { | |
| 411 | + // len2 is 0, replace udxy2 with perpendicular of udxy1 | |
| 412 | + udx2 = udy1; | |
| 413 | + udy2 = -udx1; | |
| 414 | + } | |
| 415 | + udx1 *= lw1; | |
| 416 | + udy1 *= lw1; | |
| 417 | + udx2 *= lw2; | |
| 418 | + udy2 *= lw2; | |
| 419 | + px -= (udx1 + udx2) / 2; | |
| 420 | + py -= (udy1 + udy2) / 2; | |
| 421 | + dx1 += udx1; | |
| 422 | + dy1 += udy1; | |
| 423 | + dx2 += udx2; | |
| 424 | + dy2 += udy2; | |
| 425 | + | |
| 426 | + outrenderer.fillParallelogram(sg2d, ux1, uy1, ux2, uy2, | |
| 427 | + px, py, dx1, dy1, dx2, dy2); | |
| 428 | + } | |
| 429 | +} | |