GLES20Canvas.java revision e4ac2d6b5723c95e648c489b187ddde449452c13
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; 37import android.util.Finalizers; 38 39import java.util.Collections; 40import java.util.HashSet; 41import java.util.Set; 42 43/** 44 * An implementation of Canvas on top of OpenGL ES 2.0. 45 */ 46class GLES20Canvas extends HardwareCanvas { 47 private final boolean mOpaque; 48 private int mRenderer; 49 50 private int mWidth; 51 private int mHeight; 52 53 private final float[] mPoint = new float[2]; 54 private final float[] mLine = new float[4]; 55 56 private final Rect mClipBounds = new Rect(); 57 58 private DrawFilter mFilter; 59 60 private boolean mContextLocked; 61 62 /////////////////////////////////////////////////////////////////////////// 63 // JNI 64 /////////////////////////////////////////////////////////////////////////// 65 66 private static native boolean nIsAvailable(); 67 private static boolean sIsAvailable = nIsAvailable(); 68 69 static boolean isAvailable() { 70 return sIsAvailable; 71 } 72 73 /////////////////////////////////////////////////////////////////////////// 74 // Constructors 75 /////////////////////////////////////////////////////////////////////////// 76 77 GLES20Canvas(boolean translucent) { 78 this(false, translucent); 79 } 80 81 GLES20Canvas(boolean record, boolean translucent) { 82 mOpaque = !translucent; 83 84 if (record) { 85 mRenderer = nCreateDisplayListRenderer(); 86 } else { 87 mRenderer = nCreateRenderer(); 88 } 89 90 if (mRenderer == 0) { 91 throw new IllegalStateException("Could not create GLES20Canvas renderer"); 92 } else { 93 new CanvasFinalizer(this); 94 } 95 } 96 97 private native int nCreateRenderer(); 98 private native int nCreateDisplayListRenderer(); 99 100 private static native void nDestroyRenderer(int renderer); 101 102 private static class CanvasFinalizer extends Finalizers.ReclaimableReference<GLES20Canvas> { 103 private static final Set<CanvasFinalizer> sFinalizers = Collections.synchronizedSet( 104 new HashSet<CanvasFinalizer>()); 105 106 private int mRenderer; 107 108 CanvasFinalizer(GLES20Canvas canvas) { 109 super(canvas, Finalizers.getQueue()); 110 mRenderer = canvas.mRenderer; 111 sFinalizers.add(this); 112 } 113 114 @Override 115 public void reclaim() { 116 nDestroyRenderer(mRenderer); 117 sFinalizers.remove(this); 118 } 119 } 120 121 /////////////////////////////////////////////////////////////////////////// 122 // Canvas management 123 /////////////////////////////////////////////////////////////////////////// 124 125 @Override 126 public boolean isOpaque() { 127 return mOpaque; 128 } 129 130 @Override 131 public int getWidth() { 132 return mWidth; 133 } 134 135 @Override 136 public int getHeight() { 137 return mHeight; 138 } 139 140 /////////////////////////////////////////////////////////////////////////// 141 // Setup 142 /////////////////////////////////////////////////////////////////////////// 143 144 @Override 145 public void setViewport(int width, int height) { 146 mWidth = width; 147 mHeight = height; 148 149 nSetViewport(mRenderer, width, height); 150 } 151 152 private native void nSetViewport(int renderer, int width, int height); 153 154 @Override 155 void onPreDraw() { 156 nPrepare(mRenderer, mOpaque); 157 } 158 159 private native void nPrepare(int renderer, boolean opaque); 160 161 @Override 162 void onPostDraw() { 163 nFinish(mRenderer); 164 } 165 166 private native void nFinish(int renderer); 167 168 @Override 169 public boolean acquireContext() { 170 if (!mContextLocked) { 171 nAcquireContext(mRenderer); 172 mContextLocked = true; 173 } 174 return mContextLocked; 175 } 176 177 private native void nAcquireContext(int renderer); 178 179 @Override 180 public void releaseContext() { 181 if (mContextLocked) { 182 nReleaseContext(mRenderer); 183 mContextLocked = false; 184 } 185 } 186 187 private native void nReleaseContext(int renderer); 188 189 /////////////////////////////////////////////////////////////////////////// 190 // Display list 191 /////////////////////////////////////////////////////////////////////////// 192 193 int getDisplayList() { 194 return nCreateDisplayList(mRenderer); 195 } 196 197 private native int nCreateDisplayList(int renderer); 198 199 static void destroyDisplayList(int displayList) { 200 nDestroyDisplayList(displayList); 201 } 202 203 private static native void nDestroyDisplayList(int displayList); 204 205 @Override 206 public void drawDisplayList(DisplayList displayList) { 207 nDrawDisplayList(mRenderer, ((GLES20DisplayList) displayList).mNativeDisplayList); 208 } 209 210 private native void nDrawDisplayList(int renderer, int displayList); 211 212 /////////////////////////////////////////////////////////////////////////// 213 // Clipping 214 /////////////////////////////////////////////////////////////////////////// 215 216 @Override 217 public boolean clipPath(Path path) { 218 throw new UnsupportedOperationException(); 219 } 220 221 @Override 222 public boolean clipPath(Path path, Region.Op op) { 223 throw new UnsupportedOperationException(); 224 } 225 226 @Override 227 public boolean clipRect(float left, float top, float right, float bottom) { 228 return nClipRect(mRenderer, left, top, right, bottom, Region.Op.INTERSECT.nativeInt); 229 } 230 231 private native boolean nClipRect(int renderer, float left, float top, 232 float right, float bottom, int op); 233 234 @Override 235 public boolean clipRect(float left, float top, float right, float bottom, Region.Op op) { 236 return nClipRect(mRenderer, left, top, right, bottom, op.nativeInt); 237 } 238 239 @Override 240 public boolean clipRect(int left, int top, int right, int bottom) { 241 return nClipRect(mRenderer, left, top, right, bottom, Region.Op.INTERSECT.nativeInt); 242 } 243 244 private native boolean nClipRect(int renderer, int left, int top, int right, int bottom, int op); 245 246 @Override 247 public boolean clipRect(Rect rect) { 248 return nClipRect(mRenderer, rect.left, rect.top, rect.right, rect.bottom, 249 Region.Op.INTERSECT.nativeInt); 250 } 251 252 @Override 253 public boolean clipRect(Rect rect, Region.Op op) { 254 return nClipRect(mRenderer, rect.left, rect.top, rect.right, rect.bottom, op.nativeInt); 255 } 256 257 @Override 258 public boolean clipRect(RectF rect) { 259 return nClipRect(mRenderer, rect.left, rect.top, rect.right, rect.bottom, 260 Region.Op.INTERSECT.nativeInt); 261 } 262 263 @Override 264 public boolean clipRect(RectF rect, Region.Op op) { 265 return nClipRect(mRenderer, rect.left, rect.top, rect.right, rect.bottom, op.nativeInt); 266 } 267 268 @Override 269 public boolean clipRegion(Region region) { 270 throw new UnsupportedOperationException(); 271 } 272 273 @Override 274 public boolean clipRegion(Region region, Region.Op op) { 275 throw new UnsupportedOperationException(); 276 } 277 278 @Override 279 public boolean getClipBounds(Rect bounds) { 280 return nGetClipBounds(mRenderer, bounds); 281 } 282 283 private native boolean nGetClipBounds(int renderer, Rect bounds); 284 285 @Override 286 public boolean quickReject(float left, float top, float right, float bottom, EdgeType type) { 287 return nQuickReject(mRenderer, left, top, right, bottom, type.nativeInt); 288 } 289 290 private native boolean nQuickReject(int renderer, float left, float top, 291 float right, float bottom, int edge); 292 293 @Override 294 public boolean quickReject(Path path, EdgeType type) { 295 throw new UnsupportedOperationException(); 296 } 297 298 @Override 299 public boolean quickReject(RectF rect, EdgeType type) { 300 return quickReject(rect.left, rect.top, rect.right, rect.bottom, type); 301 } 302 303 /////////////////////////////////////////////////////////////////////////// 304 // Transformations 305 /////////////////////////////////////////////////////////////////////////// 306 307 @Override 308 public void translate(float dx, float dy) { 309 nTranslate(mRenderer, dx, dy); 310 } 311 312 private native void nTranslate(int renderer, float dx, float dy); 313 314 @Override 315 public void skew(float sx, float sy) { 316 throw new UnsupportedOperationException(); 317 } 318 319 @Override 320 public void rotate(float degrees) { 321 nRotate(mRenderer, degrees); 322 } 323 324 private native void nRotate(int renderer, float degrees); 325 326 @Override 327 public void scale(float sx, float sy) { 328 nScale(mRenderer, sx, sy); 329 } 330 331 private native void nScale(int renderer, float sx, float sy); 332 333 @Override 334 public void setMatrix(Matrix matrix) { 335 nSetMatrix(mRenderer, matrix.native_instance); 336 } 337 338 private native void nSetMatrix(int renderer, int matrix); 339 340 @Override 341 public int getNativeMatrix() { 342 return nGetMatrix(mRenderer); 343 } 344 345 private native int nGetMatrix(int renderer); 346 347 @Override 348 public void getMatrix(Matrix matrix) { 349 nGetMatrix(mRenderer, matrix.native_instance); 350 } 351 352 private native void nGetMatrix(int renderer, int matrix); 353 354 @Override 355 public void concat(Matrix matrix) { 356 nConcatMatrix(mRenderer, matrix.native_instance); 357 } 358 359 private native void nConcatMatrix(int renderer, int matrix); 360 361 /////////////////////////////////////////////////////////////////////////// 362 // State management 363 /////////////////////////////////////////////////////////////////////////// 364 365 @Override 366 public int save() { 367 return nSave(mRenderer, Canvas.CLIP_SAVE_FLAG | Canvas.MATRIX_SAVE_FLAG); 368 } 369 370 @Override 371 public int save(int saveFlags) { 372 return nSave(mRenderer, saveFlags); 373 } 374 375 private native int nSave(int renderer, int flags); 376 377 @Override 378 public int saveLayer(RectF bounds, Paint paint, int saveFlags) { 379 return saveLayer(bounds.left, bounds.top, bounds.right, bounds.bottom, paint, saveFlags); 380 } 381 382 @Override 383 public int saveLayer(float left, float top, float right, float bottom, Paint paint, 384 int saveFlags) { 385 int nativePaint = paint == null ? 0 : paint.mNativePaint; 386 return nSaveLayer(mRenderer, left, top, right, bottom, nativePaint, saveFlags); 387 } 388 389 private native int nSaveLayer(int renderer, float left, float top, float right, float bottom, 390 int paint, int saveFlags); 391 392 @Override 393 public int saveLayerAlpha(RectF bounds, int alpha, int saveFlags) { 394 return saveLayerAlpha(bounds.left, bounds.top, bounds.right, bounds.bottom, 395 alpha, saveFlags); 396 } 397 398 @Override 399 public int saveLayerAlpha(float left, float top, float right, float bottom, int alpha, 400 int saveFlags) { 401 return nSaveLayerAlpha(mRenderer, left, top, right, bottom, alpha, saveFlags); 402 } 403 404 private native int nSaveLayerAlpha(int renderer, float left, float top, float right, 405 float bottom, int alpha, int saveFlags); 406 407 @Override 408 public void restore() { 409 nRestore(mRenderer); 410 } 411 412 private native void nRestore(int renderer); 413 414 @Override 415 public void restoreToCount(int saveCount) { 416 nRestoreToCount(mRenderer, saveCount); 417 } 418 419 private native void nRestoreToCount(int renderer, int saveCount); 420 421 @Override 422 public int getSaveCount() { 423 return nGetSaveCount(mRenderer); 424 } 425 426 private native int nGetSaveCount(int renderer); 427 428 /////////////////////////////////////////////////////////////////////////// 429 // Filtering 430 /////////////////////////////////////////////////////////////////////////// 431 432 @Override 433 public void setDrawFilter(DrawFilter filter) { 434 mFilter = filter; 435 } 436 437 @Override 438 public DrawFilter getDrawFilter() { 439 return mFilter; 440 } 441 442 /////////////////////////////////////////////////////////////////////////// 443 // Drawing 444 /////////////////////////////////////////////////////////////////////////// 445 446 @Override 447 public void drawArc(RectF oval, float startAngle, float sweepAngle, boolean useCenter, 448 Paint paint) { 449 throw new UnsupportedOperationException(); 450 } 451 452 @Override 453 public void drawARGB(int a, int r, int g, int b) { 454 drawColor((a & 0xFF) << 24 | (r & 0xFF) << 16 | (g & 0xFF) << 8 | (b & 0xFF)); 455 } 456 457 @Override 458 public void drawPatch(Bitmap bitmap, byte[] chunks, RectF dst, Paint paint) { 459 // Shaders are ignored when drawing patches 460 boolean hasColorFilter = paint != null && setupColorFilter(paint); 461 final int nativePaint = paint == null ? 0 : paint.mNativePaint; 462 nDrawPatch(mRenderer, bitmap.mNativeBitmap, bitmap.mBuffer, chunks, 463 dst.left, dst.top, dst.right, dst.bottom, nativePaint); 464 if (hasColorFilter) nResetModifiers(mRenderer); 465 } 466 467 private native void nDrawPatch(int renderer, int bitmap, byte[] buffer, byte[] chunks, 468 float left, float top, float right, float bottom, int paint); 469 470 @Override 471 public void drawBitmap(Bitmap bitmap, float left, float top, Paint paint) { 472 // Shaders are ignored when drawing bitmaps 473 boolean hasColorFilter = paint != null && setupColorFilter(paint); 474 final int nativePaint = paint == null ? 0 : paint.mNativePaint; 475 nDrawBitmap(mRenderer, bitmap.mNativeBitmap, bitmap.mBuffer, left, top, nativePaint); 476 if (hasColorFilter) nResetModifiers(mRenderer); 477 } 478 479 private native void nDrawBitmap( 480 int renderer, int bitmap, byte[] buffer, float left, float top, int paint); 481 482 @Override 483 public void drawBitmap(Bitmap bitmap, Matrix matrix, Paint paint) { 484 // Shaders are ignored when drawing bitmaps 485 boolean hasColorFilter = paint != null && setupColorFilter(paint); 486 final int nativePaint = paint == null ? 0 : paint.mNativePaint; 487 nDrawBitmap(mRenderer, bitmap.mNativeBitmap, bitmap.mBuffer, 488 matrix.native_instance, nativePaint); 489 if (hasColorFilter) nResetModifiers(mRenderer); 490 } 491 492 private native void nDrawBitmap(int renderer, int bitmap, byte[] buff, int matrix, int paint); 493 494 @Override 495 public void drawBitmap(Bitmap bitmap, Rect src, Rect dst, Paint paint) { 496 // Shaders are ignored when drawing bitmaps 497 boolean hasColorFilter = paint != null && setupColorFilter(paint); 498 final int nativePaint = paint == null ? 0 : paint.mNativePaint; 499 500 int left, top, right, bottom; 501 if (src == null) { 502 left = top = 0; 503 right = bitmap.getWidth(); 504 bottom = bitmap.getHeight(); 505 } else { 506 left = src.left; 507 right = src.right; 508 top = src.top; 509 bottom = src.bottom; 510 } 511 512 nDrawBitmap(mRenderer, bitmap.mNativeBitmap, bitmap.mBuffer, left, top, right, bottom, 513 dst.left, dst.top, dst.right, dst.bottom, nativePaint); 514 if (hasColorFilter) nResetModifiers(mRenderer); 515 } 516 517 @Override 518 public void drawBitmap(Bitmap bitmap, Rect src, RectF dst, Paint paint) { 519 // Shaders are ignored when drawing bitmaps 520 boolean hasColorFilter = paint != null && setupColorFilter(paint); 521 final int nativePaint = paint == null ? 0 : paint.mNativePaint; 522 nDrawBitmap(mRenderer, bitmap.mNativeBitmap, bitmap.mBuffer, src.left, src.top, src.right, 523 src.bottom, dst.left, dst.top, dst.right, dst.bottom, nativePaint); 524 if (hasColorFilter) nResetModifiers(mRenderer); 525 } 526 527 private native void nDrawBitmap(int renderer, int bitmap, byte[] buffer, 528 float srcLeft, float srcTop, float srcRight, float srcBottom, 529 float left, float top, float right, float bottom, int paint); 530 531 @Override 532 public void drawBitmap(int[] colors, int offset, int stride, float x, float y, 533 int width, int height, boolean hasAlpha, Paint paint) { 534 // Shaders are ignored when drawing bitmaps 535 boolean hasColorFilter = paint != null && setupColorFilter(paint); 536 final Bitmap.Config config = hasAlpha ? Bitmap.Config.ARGB_8888 : Bitmap.Config.RGB_565; 537 final Bitmap b = Bitmap.createBitmap(colors, offset, stride, width, height, config); 538 final int nativePaint = paint == null ? 0 : paint.mNativePaint; 539 nDrawBitmap(mRenderer, b.mNativeBitmap, b.mBuffer, x, y, nativePaint); 540 b.recycle(); 541 if (hasColorFilter) nResetModifiers(mRenderer); 542 } 543 544 @Override 545 public void drawBitmap(int[] colors, int offset, int stride, int x, int y, 546 int width, int height, boolean hasAlpha, Paint paint) { 547 // Shaders are ignored when drawing bitmaps 548 drawBitmap(colors, offset, stride, (float) x, (float) y, width, height, hasAlpha, paint); 549 } 550 551 @Override 552 public void drawBitmapMesh(Bitmap bitmap, int meshWidth, int meshHeight, float[] verts, 553 int vertOffset, int[] colors, int colorOffset, Paint paint) { 554 // TODO: Implement 555 } 556 557 @Override 558 public void drawCircle(float cx, float cy, float radius, Paint paint) { 559 throw new UnsupportedOperationException(); 560 } 561 562 @Override 563 public void drawColor(int color) { 564 drawColor(color, PorterDuff.Mode.SRC_OVER); 565 } 566 567 @Override 568 public void drawColor(int color, PorterDuff.Mode mode) { 569 nDrawColor(mRenderer, color, mode.nativeInt); 570 } 571 572 private native void nDrawColor(int renderer, int color, int mode); 573 574 @Override 575 public void drawLine(float startX, float startY, float stopX, float stopY, Paint paint) { 576 mLine[0] = startX; 577 mLine[1] = startY; 578 mLine[2] = stopX; 579 mLine[3] = stopY; 580 drawLines(mLine, 0, 4, paint); 581 } 582 583 @Override 584 public void drawLines(float[] pts, int offset, int count, Paint paint) { 585 if ((offset | count) < 0 || offset + count > pts.length) { 586 throw new IllegalArgumentException("The lines array must contain 4 elements per line."); 587 } 588 boolean hasModifier = setupModifiers(paint); 589 nDrawLines(mRenderer, pts, offset, count, paint.mNativePaint); 590 if (hasModifier) nResetModifiers(mRenderer); 591 } 592 593 private native void nDrawLines(int renderer, float[] points, int offset, int count, int paint); 594 595 @Override 596 public void drawLines(float[] pts, Paint paint) { 597 drawLines(pts, 0, pts.length, paint); 598 } 599 600 @Override 601 public void drawOval(RectF oval, Paint paint) { 602 throw new UnsupportedOperationException(); 603 } 604 605 @Override 606 public void drawPaint(Paint paint) { 607 final Rect r = mClipBounds; 608 nGetClipBounds(mRenderer, r); 609 drawRect(r.left, r.top, r.right, r.bottom, paint); 610 } 611 612 @Override 613 public void drawPath(Path path, Paint paint) { 614 boolean hasModifier = setupModifiers(paint); 615 if (path.isSimplePath) { 616 if (path.rects != null) { 617 nDrawRects(mRenderer, path.rects.mNativeRegion, paint.mNativePaint); 618 } 619 } else { 620 nDrawPath(mRenderer, path.mNativePath, paint.mNativePaint); 621 } 622 if (hasModifier) nResetModifiers(mRenderer); 623 } 624 625 private native void nDrawPath(int renderer, int path, int paint); 626 private native void nDrawRects(int renderer, int region, int paint); 627 628 @Override 629 public void drawPicture(Picture picture) { 630 throw new UnsupportedOperationException(); 631 } 632 633 @Override 634 public void drawPicture(Picture picture, Rect dst) { 635 throw new UnsupportedOperationException(); 636 } 637 638 @Override 639 public void drawPicture(Picture picture, RectF dst) { 640 throw new UnsupportedOperationException(); 641 } 642 643 @Override 644 public void drawPoint(float x, float y, Paint paint) { 645 mPoint[0] = x; 646 mPoint[1] = y; 647 drawPoints(mPoint, 0, 1, paint); 648 } 649 650 @Override 651 public void drawPoints(float[] pts, int offset, int count, Paint paint) { 652 // TODO: Implement 653 } 654 655 @Override 656 public void drawPoints(float[] pts, Paint paint) { 657 drawPoints(pts, 0, pts.length / 2, paint); 658 } 659 660 @Override 661 public void drawPosText(char[] text, int index, int count, float[] pos, Paint paint) { 662 throw new UnsupportedOperationException(); 663 } 664 665 @Override 666 public void drawPosText(String text, float[] pos, Paint paint) { 667 throw new UnsupportedOperationException(); 668 } 669 670 @Override 671 public void drawRect(float left, float top, float right, float bottom, Paint paint) { 672 boolean hasModifier = setupModifiers(paint); 673 nDrawRect(mRenderer, left, top, right, bottom, paint.mNativePaint); 674 if (hasModifier) nResetModifiers(mRenderer); 675 } 676 677 private native void nDrawRect(int renderer, float left, float top, float right, float bottom, 678 int paint); 679 680 @Override 681 public void drawRect(Rect r, Paint paint) { 682 drawRect(r.left, r.top, r.right, r.bottom, paint); 683 } 684 685 @Override 686 public void drawRect(RectF r, Paint paint) { 687 drawRect(r.left, r.top, r.right, r.bottom, paint); 688 } 689 690 @Override 691 public void drawRGB(int r, int g, int b) { 692 drawColor(0xFF000000 | (r & 0xFF) << 16 | (g & 0xFF) << 8 | (b & 0xFF)); 693 } 694 695 @Override 696 public void drawRoundRect(RectF rect, float rx, float ry, Paint paint) { 697 // TODO: Implement 698 } 699 700 @Override 701 public void drawText(char[] text, int index, int count, float x, float y, Paint paint) { 702 if ((index | count | (index + count) | (text.length - index - count)) < 0) { 703 throw new IndexOutOfBoundsException(); 704 } 705 706 boolean hasModifier = setupModifiers(paint); 707 try { 708 nDrawText(mRenderer, text, index, count, x, y, paint.mBidiFlags, paint.mNativePaint); 709 } finally { 710 if (hasModifier) nResetModifiers(mRenderer); 711 } 712 } 713 714 private native void nDrawText(int renderer, char[] text, int index, int count, float x, float y, 715 int bidiFlags, int paint); 716 717 @Override 718 public void drawText(CharSequence text, int start, int end, float x, float y, Paint paint) { 719 boolean hasModifier = setupModifiers(paint); 720 try { 721 if (text instanceof String || text instanceof SpannedString || 722 text instanceof SpannableString) { 723 nDrawText(mRenderer, text.toString(), start, end, x, y, paint.mBidiFlags, 724 paint.mNativePaint); 725 } else if (text instanceof GraphicsOperations) { 726 ((GraphicsOperations) text).drawText(this, start, end, x, y, 727 paint); 728 } else { 729 char[] buf = TemporaryBuffer.obtain(end - start); 730 TextUtils.getChars(text, start, end, buf, 0); 731 nDrawText(mRenderer, buf, 0, end - start, x, y, paint.mBidiFlags, paint.mNativePaint); 732 TemporaryBuffer.recycle(buf); 733 } 734 } finally { 735 if (hasModifier) nResetModifiers(mRenderer); 736 } 737 } 738 739 @Override 740 public void drawText(String text, int start, int end, float x, float y, Paint paint) { 741 if ((start | end | (end - start) | (text.length() - end)) < 0) { 742 throw new IndexOutOfBoundsException(); 743 } 744 745 boolean hasModifier = setupModifiers(paint); 746 try { 747 nDrawText(mRenderer, text, start, end, x, y, paint.mBidiFlags, paint.mNativePaint); 748 } finally { 749 if (hasModifier) nResetModifiers(mRenderer); 750 } 751 } 752 753 private native void nDrawText(int renderer, String text, int start, int end, float x, float y, 754 int bidiFlags, int paint); 755 756 @Override 757 public void drawText(String text, float x, float y, Paint paint) { 758 boolean hasModifier = setupModifiers(paint); 759 try { 760 nDrawText(mRenderer, text, 0, text.length(), x, y, paint.mBidiFlags, 761 paint.mNativePaint); 762 } finally { 763 if (hasModifier) nResetModifiers(mRenderer); 764 } 765 } 766 767 @Override 768 public void drawTextOnPath(char[] text, int index, int count, Path path, float hOffset, 769 float vOffset, Paint paint) { 770 throw new UnsupportedOperationException(); 771 } 772 773 @Override 774 public void drawTextOnPath(String text, Path path, float hOffset, float vOffset, Paint paint) { 775 throw new UnsupportedOperationException(); 776 } 777 778 @Override 779 public void drawTextRun(char[] text, int index, int count, int contextIndex, int contextCount, 780 float x, float y, int dir, Paint paint) { 781 if ((index | count | text.length - index - count) < 0) { 782 throw new IndexOutOfBoundsException(); 783 } 784 if (dir != DIRECTION_LTR && dir != DIRECTION_RTL) { 785 throw new IllegalArgumentException("Unknown direction: " + dir); 786 } 787 788 boolean hasModifier = setupModifiers(paint); 789 try { 790 nDrawTextRun(mRenderer, text, index, count, contextIndex, contextCount, x, y, dir, 791 paint.mNativePaint); 792 } finally { 793 if (hasModifier) nResetModifiers(mRenderer); 794 } 795 } 796 797 private native void nDrawTextRun(int renderer, char[] text, int index, int count, 798 int contextIndex, int contextCount, float x, float y, int dir, int nativePaint); 799 800 @Override 801 public void drawTextRun(CharSequence text, int start, int end, int contextStart, int contextEnd, 802 float x, float y, int dir, Paint paint) { 803 if ((start | end | end - start | text.length() - end) < 0) { 804 throw new IndexOutOfBoundsException(); 805 } 806 807 boolean hasModifier = setupModifiers(paint); 808 try { 809 int flags = dir == 0 ? 0 : 1; 810 if (text instanceof String || text instanceof SpannedString || 811 text instanceof SpannableString) { 812 nDrawTextRun(mRenderer, text.toString(), start, end, contextStart, 813 contextEnd, x, y, flags, paint.mNativePaint); 814 } else if (text instanceof GraphicsOperations) { 815 ((GraphicsOperations) text).drawTextRun(this, start, end, 816 contextStart, contextEnd, x, y, flags, paint); 817 } else { 818 int contextLen = contextEnd - contextStart; 819 int len = end - start; 820 char[] buf = TemporaryBuffer.obtain(contextLen); 821 TextUtils.getChars(text, contextStart, contextEnd, buf, 0); 822 nDrawTextRun(mRenderer, buf, start - contextStart, len, 0, contextLen, 823 x, y, flags, paint.mNativePaint); 824 TemporaryBuffer.recycle(buf); 825 } 826 } finally { 827 if (hasModifier) nResetModifiers(mRenderer); 828 } 829 } 830 831 private native void nDrawTextRun(int renderer, String text, int start, int end, 832 int contextStart, int contextEnd, float x, float y, int flags, int nativePaint); 833 834 @Override 835 public void drawVertices(VertexMode mode, int vertexCount, float[] verts, int vertOffset, 836 float[] texs, int texOffset, int[] colors, int colorOffset, short[] indices, 837 int indexOffset, int indexCount, Paint paint) { 838 // TODO: Implement 839 } 840 841 private boolean setupModifiers(Paint paint) { 842 boolean hasModifier = false; 843 844 if (paint.hasShadow) { 845 nSetupShadow(mRenderer, paint.shadowRadius, paint.shadowDx, paint.shadowDy, 846 paint.shadowColor); 847 hasModifier = true; 848 } 849 850 final Shader shader = paint.getShader(); 851 if (shader != null) { 852 nSetupShader(mRenderer, shader.native_shader); 853 hasModifier = true; 854 } 855 856 final ColorFilter filter = paint.getColorFilter(); 857 if (filter != null) { 858 nSetupColorFilter(mRenderer, filter.nativeColorFilter); 859 hasModifier = true; 860 } 861 862 return hasModifier; 863 } 864 865 private boolean setupColorFilter(Paint paint) { 866 final ColorFilter filter = paint.getColorFilter(); 867 if (filter != null) { 868 nSetupColorFilter(mRenderer, filter.nativeColorFilter); 869 return true; 870 } 871 return false; 872 } 873 874 private native void nSetupShader(int renderer, int shader); 875 private native void nSetupColorFilter(int renderer, int colorFilter); 876 private native void nSetupShadow(int renderer, float radius, float dx, float dy, int color); 877 878 private native void nResetModifiers(int renderer); 879} 880