GLES20Canvas.java revision da8532c6f48b4c10b5e2ccb9e08690341efa1616
1/* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.view; 18 19import android.graphics.Bitmap; 20import android.graphics.Canvas; 21import android.graphics.ColorFilter; 22import android.graphics.DrawFilter; 23import android.graphics.Matrix; 24import android.graphics.Paint; 25import android.graphics.Path; 26import android.graphics.Picture; 27import android.graphics.PorterDuff; 28import android.graphics.Rect; 29import android.graphics.RectF; 30import android.graphics.Region; 31import android.graphics.Shader; 32import android.graphics.TemporaryBuffer; 33import android.text.GraphicsOperations; 34import android.text.SpannableString; 35import android.text.SpannedString; 36import android.text.TextUtils; 37 38import javax.microedition.khronos.opengles.GL; 39 40/** 41 * An implementation of Canvas on top of OpenGL ES 2.0. 42 */ 43class GLES20Canvas extends Canvas { 44 @SuppressWarnings({"FieldCanBeLocal", "UnusedDeclaration"}) 45 private final GL mGl; 46 private final boolean mOpaque; 47 private int mRenderer; 48 49 private int mWidth; 50 private int mHeight; 51 52 private final float[] mPoint = new float[2]; 53 private final float[] mLine = new float[4]; 54 55 private final Rect mClipBounds = new Rect(); 56 57 private DrawFilter mFilter; 58 59 private boolean mContextLocked; 60 61 /////////////////////////////////////////////////////////////////////////// 62 // JNI 63 /////////////////////////////////////////////////////////////////////////// 64 65 private static native boolean nIsAvailable(); 66 private static boolean sIsAvailable = nIsAvailable(); 67 68 static boolean isAvailable() { 69 return sIsAvailable; 70 } 71 72 /////////////////////////////////////////////////////////////////////////// 73 // Constructors 74 /////////////////////////////////////////////////////////////////////////// 75 76 GLES20Canvas(GL gl, boolean translucent) { 77 mGl = gl; 78 mOpaque = !translucent; 79 80 mRenderer = nCreateRenderer(); 81 if (mRenderer == 0) { 82 throw new IllegalStateException("Could not create GLES20Canvas renderer"); 83 } 84 } 85 86 private native int nCreateRenderer(); 87 88 /** 89 * This method <strong>must</strong> be called before releasing a 90 * reference to a GLES20Canvas. This method is responsible for freeing 91 * native resources associated with the hardware. Not invoking this 92 * method properly can result in memory leaks. 93 * 94 * @hide 95 */ 96 public synchronized void destroy() { 97 if (mRenderer != 0) { 98 nDestroyRenderer(mRenderer); 99 mRenderer = 0; 100 } 101 } 102 103 private native void nDestroyRenderer(int renderer); 104 105 /////////////////////////////////////////////////////////////////////////// 106 // Canvas management 107 /////////////////////////////////////////////////////////////////////////// 108 109 @Override 110 public boolean isHardwareAccelerated() { 111 return true; 112 } 113 114 @Override 115 public void setBitmap(Bitmap bitmap) { 116 throw new UnsupportedOperationException(); 117 } 118 119 @Override 120 public boolean isOpaque() { 121 return mOpaque; 122 } 123 124 @Override 125 public int getWidth() { 126 return mWidth; 127 } 128 129 @Override 130 public int getHeight() { 131 return mHeight; 132 } 133 134 /////////////////////////////////////////////////////////////////////////// 135 // Setup 136 /////////////////////////////////////////////////////////////////////////// 137 138 @Override 139 public void setViewport(int width, int height) { 140 mWidth = width; 141 mHeight = height; 142 143 nSetViewport(mRenderer, width, height); 144 } 145 146 private native void nSetViewport(int renderer, int width, int height); 147 148 void onPreDraw() { 149 nPrepare(mRenderer); 150 } 151 152 private native void nPrepare(int renderer); 153 154 @Override 155 public boolean acquireContext() { 156 if (!mContextLocked) { 157 nAcquireContext(mRenderer); 158 mContextLocked = true; 159 } 160 return mContextLocked; 161 } 162 163 private native void nAcquireContext(int renderer); 164 165 @Override 166 public void releaseContext() { 167 if (mContextLocked) { 168 nReleaseContext(mRenderer); 169 mContextLocked = false; 170 } 171 } 172 173 private native void nReleaseContext(int renderer); 174 175 /////////////////////////////////////////////////////////////////////////// 176 // Clipping 177 /////////////////////////////////////////////////////////////////////////// 178 179 @Override 180 public boolean clipPath(Path path) { 181 throw new UnsupportedOperationException(); 182 } 183 184 @Override 185 public boolean clipPath(Path path, Region.Op op) { 186 throw new UnsupportedOperationException(); 187 } 188 189 @Override 190 public boolean clipRect(float left, float top, float right, float bottom) { 191 return nClipRect(mRenderer, left, top, right, bottom, Region.Op.INTERSECT.nativeInt); 192 } 193 194 private native boolean nClipRect(int renderer, float left, float top, 195 float right, float bottom, int op); 196 197 @Override 198 public boolean clipRect(float left, float top, float right, float bottom, Region.Op op) { 199 return nClipRect(mRenderer, left, top, right, bottom, op.nativeInt); 200 } 201 202 @Override 203 public boolean clipRect(int left, int top, int right, int bottom) { 204 return nClipRect(mRenderer, left, top, right, bottom, Region.Op.INTERSECT.nativeInt); 205 } 206 207 private native boolean nClipRect(int renderer, int left, int top, int right, int bottom, int op); 208 209 @Override 210 public boolean clipRect(Rect rect) { 211 return nClipRect(mRenderer, rect.left, rect.top, rect.right, rect.bottom, 212 Region.Op.INTERSECT.nativeInt); 213 } 214 215 @Override 216 public boolean clipRect(Rect rect, Region.Op op) { 217 return nClipRect(mRenderer, rect.left, rect.top, rect.right, rect.bottom, op.nativeInt); 218 } 219 220 @Override 221 public boolean clipRect(RectF rect) { 222 return nClipRect(mRenderer, rect.left, rect.top, rect.right, rect.bottom, 223 Region.Op.INTERSECT.nativeInt); 224 } 225 226 @Override 227 public boolean clipRect(RectF rect, Region.Op op) { 228 return nClipRect(mRenderer, rect.left, rect.top, rect.right, rect.bottom, op.nativeInt); 229 } 230 231 @Override 232 public boolean clipRegion(Region region) { 233 throw new UnsupportedOperationException(); 234 } 235 236 @Override 237 public boolean clipRegion(Region region, Region.Op op) { 238 throw new UnsupportedOperationException(); 239 } 240 241 @Override 242 public boolean getClipBounds(Rect bounds) { 243 return nGetClipBounds(mRenderer, bounds); 244 } 245 246 private native boolean nGetClipBounds(int renderer, Rect bounds); 247 248 @Override 249 public boolean quickReject(float left, float top, float right, float bottom, EdgeType type) { 250 return nQuickReject(mRenderer, left, top, right, bottom, type.nativeInt); 251 } 252 253 private native boolean nQuickReject(int renderer, float left, float top, 254 float right, float bottom, int edge); 255 256 @Override 257 public boolean quickReject(Path path, EdgeType type) { 258 throw new UnsupportedOperationException(); 259 } 260 261 @Override 262 public boolean quickReject(RectF rect, EdgeType type) { 263 return quickReject(rect.left, rect.top, rect.right, rect.bottom, type); 264 } 265 266 /////////////////////////////////////////////////////////////////////////// 267 // Transformations 268 /////////////////////////////////////////////////////////////////////////// 269 270 @Override 271 public void translate(float dx, float dy) { 272 nTranslate(mRenderer, dx, dy); 273 } 274 275 private native void nTranslate(int renderer, float dx, float dy); 276 277 @Override 278 public void skew(float sx, float sy) { 279 throw new UnsupportedOperationException(); 280 } 281 282 @Override 283 public void rotate(float degrees) { 284 nRotate(mRenderer, degrees); 285 } 286 287 private native void nRotate(int renderer, float degrees); 288 289 @Override 290 public void scale(float sx, float sy) { 291 nScale(mRenderer, sx, sy); 292 } 293 294 private native void nScale(int renderer, float sx, float sy); 295 296 @Override 297 public void setMatrix(Matrix matrix) { 298 nSetMatrix(mRenderer, matrix.native_instance); 299 } 300 301 private native void nSetMatrix(int renderer, int matrix); 302 303 @Override 304 public void getMatrix(Matrix matrix) { 305 nGetMatrix(mRenderer, matrix.native_instance); 306 } 307 308 private native void nGetMatrix(int renderer, int matrix); 309 310 @Override 311 public void concat(Matrix matrix) { 312 nConcatMatrix(mRenderer, matrix.native_instance); 313 } 314 315 private native void nConcatMatrix(int renderer, int matrix); 316 317 /////////////////////////////////////////////////////////////////////////// 318 // State management 319 /////////////////////////////////////////////////////////////////////////// 320 321 @Override 322 public int save() { 323 return nSave(mRenderer, 0); 324 } 325 326 @Override 327 public int save(int saveFlags) { 328 return nSave(mRenderer, saveFlags); 329 } 330 331 private native int nSave(int renderer, int flags); 332 333 @Override 334 public int saveLayer(RectF bounds, Paint paint, int saveFlags) { 335 return saveLayer(bounds.left, bounds.top, bounds.right, bounds.bottom, paint, saveFlags); 336 } 337 338 @Override 339 public int saveLayer(float left, float top, float right, float bottom, Paint paint, 340 int saveFlags) { 341 int nativePaint = paint == null ? 0 : paint.mNativePaint; 342 return nSaveLayer(mRenderer, left, top, right, bottom, nativePaint, saveFlags); 343 } 344 345 private native int nSaveLayer(int renderer, float left, float top, float right, float bottom, 346 int paint, int saveFlags); 347 348 @Override 349 public int saveLayerAlpha(RectF bounds, int alpha, int saveFlags) { 350 return saveLayerAlpha(bounds.left, bounds.top, bounds.right, bounds.bottom, 351 alpha, saveFlags); 352 } 353 354 @Override 355 public int saveLayerAlpha(float left, float top, float right, float bottom, int alpha, 356 int saveFlags) { 357 return nSaveLayerAlpha(mRenderer, left, top, right, bottom, alpha, saveFlags); 358 } 359 360 private native int nSaveLayerAlpha(int renderer, float left, float top, float right, 361 float bottom, int alpha, int saveFlags); 362 363 @Override 364 public void restore() { 365 nRestore(mRenderer); 366 } 367 368 private native void nRestore(int renderer); 369 370 @Override 371 public void restoreToCount(int saveCount) { 372 nRestoreToCount(mRenderer, saveCount); 373 } 374 375 private native void nRestoreToCount(int renderer, int saveCount); 376 377 @Override 378 public int getSaveCount() { 379 return nGetSaveCount(mRenderer); 380 } 381 382 private native int nGetSaveCount(int renderer); 383 384 /////////////////////////////////////////////////////////////////////////// 385 // Filtering 386 /////////////////////////////////////////////////////////////////////////// 387 388 @Override 389 public void setDrawFilter(DrawFilter filter) { 390 mFilter = filter; 391 } 392 393 @Override 394 public DrawFilter getDrawFilter() { 395 return mFilter; 396 } 397 398 /////////////////////////////////////////////////////////////////////////// 399 // Drawing 400 /////////////////////////////////////////////////////////////////////////// 401 402 @Override 403 public void drawArc(RectF oval, float startAngle, float sweepAngle, boolean useCenter, 404 Paint paint) { 405 throw new UnsupportedOperationException(); 406 } 407 408 @Override 409 public void drawARGB(int a, int r, int g, int b) { 410 drawColor((a & 0xFF) << 24 | (r & 0xFF) << 16 | (g & 0xFF) << 8 | (b & 0xFF)); 411 } 412 413 @Override 414 public void drawPatch(Bitmap bitmap, byte[] chunks, RectF dst, Paint paint) { 415 // Shaders are ignored when drawing patches 416 boolean hasColorFilter = paint != null && setupColorFilter(paint); 417 final int nativePaint = paint == null ? 0 : paint.mNativePaint; 418 nDrawPatch(mRenderer, bitmap.mNativeBitmap, chunks, dst.left, dst.top, 419 dst.right, dst.bottom, nativePaint); 420 if (hasColorFilter) nResetModifiers(mRenderer); 421 } 422 423 private native void nDrawPatch(int renderer, int bitmap, byte[] chunks, float left, float top, 424 float right, float bottom, int paint); 425 426 @Override 427 public void drawBitmap(Bitmap bitmap, float left, float top, Paint paint) { 428 // Shaders are ignored when drawing bitmaps 429 boolean hasColorFilter = paint != null && setupColorFilter(paint); 430 final int nativePaint = paint == null ? 0 : paint.mNativePaint; 431 nDrawBitmap(mRenderer, bitmap.mNativeBitmap, left, top, nativePaint); 432 if (hasColorFilter) nResetModifiers(mRenderer); 433 } 434 435 private native void nDrawBitmap(int renderer, int bitmap, float left, float top, int paint); 436 437 @Override 438 public void drawBitmap(Bitmap bitmap, Matrix matrix, Paint paint) { 439 // Shaders are ignored when drawing bitmaps 440 boolean hasColorFilter = paint != null && setupColorFilter(paint); 441 final int nativePaint = paint == null ? 0 : paint.mNativePaint; 442 nDrawBitmap(mRenderer, bitmap.mNativeBitmap, matrix.native_instance, nativePaint); 443 if (hasColorFilter) nResetModifiers(mRenderer); 444 } 445 446 private native void nDrawBitmap(int renderer, int bitmap, int matrix, int paint); 447 448 @Override 449 public void drawBitmap(Bitmap bitmap, Rect src, Rect dst, Paint paint) { 450 // Shaders are ignored when drawing bitmaps 451 boolean hasColorFilter = paint != null && setupColorFilter(paint); 452 final int nativePaint = paint == null ? 0 : paint.mNativePaint; 453 454 int left, top, right, bottom; 455 if (src == null) { 456 left = top = 0; 457 right = bitmap.getWidth(); 458 bottom = bitmap.getHeight(); 459 } else { 460 left = src.left; 461 right = src.right; 462 top = src.top; 463 bottom = src.bottom; 464 } 465 466 nDrawBitmap(mRenderer, bitmap.mNativeBitmap, left, top, right, bottom, 467 dst.left, dst.top, dst.right, dst.bottom, nativePaint); 468 if (hasColorFilter) nResetModifiers(mRenderer); 469 } 470 471 @Override 472 public void drawBitmap(Bitmap bitmap, Rect src, RectF dst, Paint paint) { 473 // Shaders are ignored when drawing bitmaps 474 boolean hasColorFilter = paint != null && setupColorFilter(paint); 475 final int nativePaint = paint == null ? 0 : paint.mNativePaint; 476 nDrawBitmap(mRenderer, bitmap.mNativeBitmap, src.left, src.top, src.right, src.bottom, 477 dst.left, dst.top, dst.right, dst.bottom, nativePaint); 478 if (hasColorFilter) nResetModifiers(mRenderer); 479 } 480 481 private native void nDrawBitmap(int renderer, int bitmap, 482 float srcLeft, float srcTop, float srcRight, float srcBottom, 483 float left, float top, float right, float bottom, int paint); 484 485 @Override 486 public void drawBitmap(int[] colors, int offset, int stride, float x, float y, 487 int width, int height, boolean hasAlpha, Paint paint) { 488 // Shaders are ignored when drawing bitmaps 489 boolean hasColorFilter = paint != null && setupColorFilter(paint); 490 final Bitmap.Config config = hasAlpha ? Bitmap.Config.ARGB_8888 : Bitmap.Config.RGB_565; 491 final Bitmap b = Bitmap.createBitmap(colors, offset, stride, width, height, config); 492 final int nativePaint = paint == null ? 0 : paint.mNativePaint; 493 nDrawBitmap(mRenderer, b.mNativeBitmap, x, y, nativePaint); 494 b.recycle(); 495 if (hasColorFilter) nResetModifiers(mRenderer); 496 } 497 498 @Override 499 public void drawBitmap(int[] colors, int offset, int stride, int x, int y, 500 int width, int height, boolean hasAlpha, Paint paint) { 501 // Shaders are ignored when drawing bitmaps 502 drawBitmap(colors, offset, stride, (float) x, (float) y, width, height, hasAlpha, paint); 503 } 504 505 @Override 506 public void drawBitmapMesh(Bitmap bitmap, int meshWidth, int meshHeight, float[] verts, 507 int vertOffset, int[] colors, int colorOffset, Paint paint) { 508 // TODO: Implement 509 } 510 511 @Override 512 public void drawCircle(float cx, float cy, float radius, Paint paint) { 513 throw new UnsupportedOperationException(); 514 } 515 516 @Override 517 public void drawColor(int color) { 518 drawColor(color, PorterDuff.Mode.SRC_OVER); 519 } 520 521 @Override 522 public void drawColor(int color, PorterDuff.Mode mode) { 523 nDrawColor(mRenderer, color, mode.nativeInt); 524 } 525 526 private native void nDrawColor(int renderer, int color, int mode); 527 528 @Override 529 public void drawLine(float startX, float startY, float stopX, float stopY, Paint paint) { 530 mLine[0] = startX; 531 mLine[1] = startY; 532 mLine[2] = stopX; 533 mLine[3] = stopY; 534 drawLines(mLine, 0, 1, paint); 535 } 536 537 @Override 538 public void drawLines(float[] pts, int offset, int count, Paint paint) { 539 // TODO: Implement 540 } 541 542 @Override 543 public void drawLines(float[] pts, Paint paint) { 544 drawLines(pts, 0, pts.length / 4, paint); 545 } 546 547 @Override 548 public void drawOval(RectF oval, Paint paint) { 549 throw new UnsupportedOperationException(); 550 } 551 552 @Override 553 public void drawPaint(Paint paint) { 554 final Rect r = mClipBounds; 555 nGetClipBounds(mRenderer, r); 556 drawRect(r.left, r.top, r.right, r.bottom, paint); 557 } 558 559 @Override 560 public void drawPath(Path path, Paint paint) { 561 boolean hasModifier = setupModifiers(paint); 562 if (path.isSimplePath) { 563 if (path.rects != null) { 564 nDrawRects(mRenderer, path.rects.mNativeRegion, paint.mNativePaint); 565 } 566 } else { 567 nDrawPath(mRenderer, path.mNativePath, paint.mNativePaint); 568 } 569 if (hasModifier) nResetModifiers(mRenderer); 570 } 571 572 private native void nDrawPath(int renderer, int path, int paint); 573 private native void nDrawRects(int renderer, int region, int paint); 574 575 @Override 576 public void drawPicture(Picture picture) { 577 throw new UnsupportedOperationException(); 578 } 579 580 @Override 581 public void drawPicture(Picture picture, Rect dst) { 582 throw new UnsupportedOperationException(); 583 } 584 585 @Override 586 public void drawPicture(Picture picture, RectF dst) { 587 throw new UnsupportedOperationException(); 588 } 589 590 @Override 591 public void drawPoint(float x, float y, Paint paint) { 592 mPoint[0] = x; 593 mPoint[1] = y; 594 drawPoints(mPoint, 0, 1, paint); 595 } 596 597 @Override 598 public void drawPoints(float[] pts, int offset, int count, Paint paint) { 599 // TODO: Implement 600 } 601 602 @Override 603 public void drawPoints(float[] pts, Paint paint) { 604 drawPoints(pts, 0, pts.length / 2, paint); 605 } 606 607 @Override 608 public void drawPosText(char[] text, int index, int count, float[] pos, Paint paint) { 609 throw new UnsupportedOperationException(); 610 } 611 612 @Override 613 public void drawPosText(String text, float[] pos, Paint paint) { 614 throw new UnsupportedOperationException(); 615 } 616 617 @Override 618 public void drawRect(float left, float top, float right, float bottom, Paint paint) { 619 boolean hasModifier = setupModifiers(paint); 620 nDrawRect(mRenderer, left, top, right, bottom, paint.mNativePaint); 621 if (hasModifier) nResetModifiers(mRenderer); 622 } 623 624 private native void nDrawRect(int renderer, float left, float top, float right, float bottom, 625 int paint); 626 627 @Override 628 public void drawRect(Rect r, Paint paint) { 629 drawRect(r.left, r.top, r.right, r.bottom, paint); 630 } 631 632 @Override 633 public void drawRect(RectF r, Paint paint) { 634 drawRect(r.left, r.top, r.right, r.bottom, paint); 635 } 636 637 @Override 638 public void drawRGB(int r, int g, int b) { 639 drawColor(0xFF000000 | (r & 0xFF) << 16 | (g & 0xFF) << 8 | (b & 0xFF)); 640 } 641 642 @Override 643 public void drawRoundRect(RectF rect, float rx, float ry, Paint paint) { 644 // TODO: Implement 645 } 646 647 @Override 648 public void drawText(char[] text, int index, int count, float x, float y, Paint paint) { 649 if ((index | count | (index + count) | (text.length - index - count)) < 0) { 650 throw new IndexOutOfBoundsException(); 651 } 652 653 boolean hasModifier = setupModifiers(paint); 654 try { 655 nDrawText(mRenderer, text, index, count, x, y, paint.mBidiFlags, paint.mNativePaint); 656 } finally { 657 if (hasModifier) nResetModifiers(mRenderer); 658 } 659 } 660 661 private native void nDrawText(int renderer, char[] text, int index, int count, float x, float y, 662 int bidiFlags, int paint); 663 664 @Override 665 public void drawText(CharSequence text, int start, int end, float x, float y, Paint paint) { 666 boolean hasModifier = setupModifiers(paint); 667 try { 668 if (text instanceof String || text instanceof SpannedString || 669 text instanceof SpannableString) { 670 nDrawText(mRenderer, text.toString(), start, end, x, y, paint.mBidiFlags, 671 paint.mNativePaint); 672 } else if (text instanceof GraphicsOperations) { 673 ((GraphicsOperations) text).drawText(this, start, end, x, y, 674 paint); 675 } else { 676 char[] buf = TemporaryBuffer.obtain(end - start); 677 TextUtils.getChars(text, start, end, buf, 0); 678 nDrawText(mRenderer, buf, 0, end - start, x, y, paint.mBidiFlags, paint.mNativePaint); 679 TemporaryBuffer.recycle(buf); 680 } 681 } finally { 682 if (hasModifier) nResetModifiers(mRenderer); 683 } 684 } 685 686 @Override 687 public void drawText(String text, int start, int end, float x, float y, Paint paint) { 688 if ((start | end | (end - start) | (text.length() - end)) < 0) { 689 throw new IndexOutOfBoundsException(); 690 } 691 692 boolean hasModifier = setupModifiers(paint); 693 try { 694 nDrawText(mRenderer, text, start, end, x, y, paint.mBidiFlags, paint.mNativePaint); 695 } finally { 696 if (hasModifier) nResetModifiers(mRenderer); 697 } 698 } 699 700 private native void nDrawText(int renderer, String text, int start, int end, float x, float y, 701 int bidiFlags, int paint); 702 703 @Override 704 public void drawText(String text, float x, float y, Paint paint) { 705 boolean hasModifier = setupModifiers(paint); 706 try { 707 nDrawText(mRenderer, text, 0, text.length(), x, y, paint.mBidiFlags, 708 paint.mNativePaint); 709 } finally { 710 if (hasModifier) nResetModifiers(mRenderer); 711 } 712 } 713 714 @Override 715 public void drawTextOnPath(char[] text, int index, int count, Path path, float hOffset, 716 float vOffset, Paint paint) { 717 throw new UnsupportedOperationException(); 718 } 719 720 @Override 721 public void drawTextOnPath(String text, Path path, float hOffset, float vOffset, Paint paint) { 722 throw new UnsupportedOperationException(); 723 } 724 725 @Override 726 public void drawTextRun(char[] text, int index, int count, int contextIndex, int contextCount, 727 float x, float y, int dir, Paint paint) { 728 if ((index | count | text.length - index - count) < 0) { 729 throw new IndexOutOfBoundsException(); 730 } 731 if (dir != DIRECTION_LTR && dir != DIRECTION_RTL) { 732 throw new IllegalArgumentException("Unknown direction: " + dir); 733 } 734 735 boolean hasModifier = setupModifiers(paint); 736 try { 737 nDrawTextRun(mRenderer, text, index, count, contextIndex, contextCount, x, y, dir, 738 paint.mNativePaint); 739 } finally { 740 if (hasModifier) nResetModifiers(mRenderer); 741 } 742 } 743 744 private native void nDrawTextRun(int renderer, char[] text, int index, int count, 745 int contextIndex, int contextCount, float x, float y, int dir, int nativePaint); 746 747 @Override 748 public void drawTextRun(CharSequence text, int start, int end, int contextStart, int contextEnd, 749 float x, float y, int dir, Paint paint) { 750 if ((start | end | end - start | text.length() - end) < 0) { 751 throw new IndexOutOfBoundsException(); 752 } 753 754 boolean hasModifier = setupModifiers(paint); 755 try { 756 int flags = dir == 0 ? 0 : 1; 757 if (text instanceof String || text instanceof SpannedString || 758 text instanceof SpannableString) { 759 nDrawTextRun(mRenderer, text.toString(), start, end, contextStart, 760 contextEnd, x, y, flags, paint.mNativePaint); 761 } else if (text instanceof GraphicsOperations) { 762 ((GraphicsOperations) text).drawTextRun(this, start, end, 763 contextStart, contextEnd, x, y, flags, paint); 764 } else { 765 int contextLen = contextEnd - contextStart; 766 int len = end - start; 767 char[] buf = TemporaryBuffer.obtain(contextLen); 768 TextUtils.getChars(text, contextStart, contextEnd, buf, 0); 769 nDrawTextRun(mRenderer, buf, start - contextStart, len, 0, contextLen, 770 x, y, flags, paint.mNativePaint); 771 TemporaryBuffer.recycle(buf); 772 } 773 } finally { 774 if (hasModifier) nResetModifiers(mRenderer); 775 } 776 } 777 778 private native void nDrawTextRun(int renderer, String text, int start, int end, 779 int contextStart, int contextEnd, float x, float y, int flags, int nativePaint); 780 781 @Override 782 public void drawVertices(VertexMode mode, int vertexCount, float[] verts, int vertOffset, 783 float[] texs, int texOffset, int[] colors, int colorOffset, short[] indices, 784 int indexOffset, int indexCount, Paint paint) { 785 // TODO: Implement 786 } 787 788 private boolean setupModifiers(Paint paint) { 789 boolean hasModifier = false; 790 791 if (paint.hasShadow) { 792 nSetupShadow(mRenderer, paint.shadowRadius, paint.shadowDx, paint.shadowDy, 793 paint.shadowColor); 794 hasModifier = true; 795 } 796 797 final Shader shader = paint.getShader(); 798 if (shader != null) { 799 nSetupShader(mRenderer, shader.native_shader); 800 hasModifier = true; 801 } 802 803 final ColorFilter filter = paint.getColorFilter(); 804 if (filter != null) { 805 nSetupColorFilter(mRenderer, filter.nativeColorFilter); 806 hasModifier = true; 807 } 808 809 return hasModifier; 810 } 811 812 private boolean setupColorFilter(Paint paint) { 813 final ColorFilter filter = paint.getColorFilter(); 814 if (filter != null) { 815 nSetupColorFilter(mRenderer, filter.nativeColorFilter); 816 return true; 817 } 818 return false; 819 } 820 821 private native void nSetupShader(int renderer, int shader); 822 private native void nSetupColorFilter(int renderer, int colorFilter); 823 private native void nSetupShadow(int renderer, float radius, float dx, float dy, int color); 824 825 private native void nResetModifiers(int renderer); 826} 827