HardwareRenderer.java revision cabfcc1364eb7e4de0b15b3574fba45027b45cfc
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 17 18package android.view; 19 20import android.graphics.Canvas; 21import android.graphics.Paint; 22import android.graphics.Rect; 23import android.os.SystemClock; 24import android.util.EventLog; 25import android.util.Log; 26 27import javax.microedition.khronos.egl.EGL10; 28import javax.microedition.khronos.egl.EGL11; 29import javax.microedition.khronos.egl.EGLConfig; 30import javax.microedition.khronos.egl.EGLContext; 31import javax.microedition.khronos.egl.EGLDisplay; 32import javax.microedition.khronos.egl.EGLSurface; 33import javax.microedition.khronos.opengles.GL; 34 35/** 36 * Interface for rendering a ViewRoot using hardware acceleration. 37 * 38 * @hide 39 */ 40public abstract class HardwareRenderer { 41 static final String LOG_TAG = "HardwareRenderer"; 42 43 /** 44 * Turn on to only refresh the parts of the screen that need updating. 45 * When turned on the property defined by {@link #RENDER_DIRTY_REGIONS_PROPERTY} 46 * must also have the value "true". 47 */ 48 public static final boolean RENDER_DIRTY_REGIONS = true; 49 50 /** 51 * System property used to enable or disable dirty regions invalidation. 52 * This property is only queried if {@link #RENDER_DIRTY_REGIONS} is true. 53 * The default value of this property is assumed to be true. 54 * 55 * Possible values: 56 * "true", to enable partial invalidates 57 * "false", to disable partial invalidates 58 */ 59 static final String RENDER_DIRTY_REGIONS_PROPERTY = "hwui.render_dirty_regions"; 60 61 /** 62 * Turn on to draw dirty regions every other frame. 63 */ 64 private static final boolean DEBUG_DIRTY_REGION = false; 65 66 /** 67 * A process can set this flag to false to prevent the use of hardware 68 * rendering. 69 * 70 * @hide 71 */ 72 public static boolean sRendererDisabled = false; 73 74 private boolean mEnabled; 75 private boolean mRequested = true; 76 77 /** 78 * Invoke this method to disable hardware rendering in the current process. 79 * 80 * @hide 81 */ 82 public static void disable() { 83 sRendererDisabled = true; 84 } 85 86 /** 87 * Indicates whether hardware acceleration is available under any form for 88 * the view hierarchy. 89 * 90 * @return True if the view hierarchy can potentially be hardware accelerated, 91 * false otherwise 92 */ 93 public static boolean isAvailable() { 94 return GLES20Canvas.isAvailable(); 95 } 96 97 /** 98 * Destroys the hardware rendering context. 99 * 100 * @param full If true, destroys all associated resources. 101 */ 102 abstract void destroy(boolean full); 103 104 /** 105 * Initializes the hardware renderer for the specified surface. 106 * 107 * @param holder The holder for the surface to hardware accelerate. 108 * 109 * @return True if the initialization was successful, false otherwise. 110 */ 111 abstract boolean initialize(SurfaceHolder holder) throws Surface.OutOfResourcesException; 112 113 /** 114 * Updates the hardware renderer for the specified surface. 115 * 116 * @param holder The holder for the surface to hardware accelerate. 117 */ 118 abstract void updateSurface(SurfaceHolder holder) throws Surface.OutOfResourcesException; 119 120 /** 121 * Setup the hardware renderer for drawing. This is called for every 122 * frame to draw. 123 * 124 * @param width Width of the drawing surface. 125 * @param height Height of the drawing surface. 126 */ 127 abstract void setup(int width, int height); 128 129 /** 130 * Interface used to receive callbacks whenever a view is drawn by 131 * a hardware renderer instance. 132 */ 133 interface HardwareDrawCallbacks { 134 /** 135 * Invoked before a view is drawn by a hardware renderer. 136 * 137 * @param canvas The Canvas used to render the view. 138 */ 139 void onHardwarePreDraw(Canvas canvas); 140 141 /** 142 * Invoked after a view is drawn by a hardware renderer. 143 * 144 * @param canvas The Canvas used to render the view. 145 */ 146 void onHardwarePostDraw(Canvas canvas); 147 } 148 149 /** 150 * Draws the specified view. 151 * 152 * @param view The view to draw. 153 * @param attachInfo AttachInfo tied to the specified view. 154 * @param callbacks Callbacks invoked when drawing happens. 155 * @param dirty The dirty rectangle to update, can be null. 156 */ 157 abstract void draw(View view, View.AttachInfo attachInfo, HardwareDrawCallbacks callbacks, 158 Rect dirty); 159 160 /** 161 * Creates a new display list that can be used to record batches of 162 * drawing operations. 163 * 164 * @return A new display list. 165 */ 166 abstract DisplayList createDisplayList(View v); 167 168 /** 169 * Creates a new hardware layer. 170 * 171 * @param width The minimum width of the layer 172 * @param height The minimum height of the layer 173 * @param isOpaque Whether the layer should be opaque or not 174 * 175 * @return A hardware layer 176 */ 177 abstract HardwareLayer createHardwareLayer(int width, int height, boolean isOpaque); 178 179 /** 180 * Initializes the hardware renderer for the specified surface and setup the 181 * renderer for drawing, if needed. This is invoked when the ViewRoot has 182 * potentially lost the hardware renderer. The hardware renderer should be 183 * reinitialized and setup when the render {@link #isRequested()} and 184 * {@link #isEnabled()}. 185 * 186 * @param width The width of the drawing surface. 187 * @param height The height of the drawing surface. 188 * @param attachInfo The 189 * @param holder 190 */ 191 void initializeIfNeeded(int width, int height, View.AttachInfo attachInfo, 192 SurfaceHolder holder) throws Surface.OutOfResourcesException { 193 if (isRequested()) { 194 // We lost the gl context, so recreate it. 195 if (!isEnabled()) { 196 if (initialize(holder)) { 197 setup(width, height); 198 } 199 } 200 } 201 } 202 203 /** 204 * Creates a hardware renderer using OpenGL. 205 * 206 * @param glVersion The version of OpenGL to use (1 for OpenGL 1, 11 for OpenGL 1.1, etc.) 207 * @param translucent True if the surface is translucent, false otherwise 208 * 209 * @return A hardware renderer backed by OpenGL. 210 */ 211 static HardwareRenderer createGlRenderer(int glVersion, boolean translucent) { 212 switch (glVersion) { 213 case 2: 214 return Gl20Renderer.create(translucent); 215 } 216 throw new IllegalArgumentException("Unknown GL version: " + glVersion); 217 } 218 219 /** 220 * Indicates whether hardware acceleration is currently enabled. 221 * 222 * @return True if hardware acceleration is in use, false otherwise. 223 */ 224 boolean isEnabled() { 225 return mEnabled; 226 } 227 228 /** 229 * Indicates whether hardware acceleration is currently enabled. 230 * 231 * @param enabled True if the hardware renderer is in use, false otherwise. 232 */ 233 void setEnabled(boolean enabled) { 234 mEnabled = enabled; 235 } 236 237 /** 238 * Indicates whether hardware acceleration is currently request but not 239 * necessarily enabled yet. 240 * 241 * @return True if requested, false otherwise. 242 */ 243 boolean isRequested() { 244 return mRequested; 245 } 246 247 /** 248 * Indicates whether hardware acceleration is currently requested but not 249 * necessarily enabled yet. 250 * 251 * @return True to request hardware acceleration, false otherwise. 252 */ 253 void setRequested(boolean requested) { 254 mRequested = requested; 255 } 256 257 @SuppressWarnings({"deprecation"}) 258 static abstract class GlRenderer extends HardwareRenderer { 259 private static final int EGL_CONTEXT_CLIENT_VERSION = 0x3098; 260 private static final int EGL_SURFACE_TYPE = 0x3033; 261 private static final int EGL_SWAP_BEHAVIOR_PRESERVED_BIT = 0x0400; 262 263 private static final int SURFACE_STATE_ERROR = 0; 264 private static final int SURFACE_STATE_SUCCESS = 1; 265 private static final int SURFACE_STATE_UPDATED = 2; 266 267 static EGLContext sEglContext; 268 static EGL10 sEgl; 269 static EGLDisplay sEglDisplay; 270 static EGLConfig sEglConfig; 271 272 private static Thread sEglThread; 273 274 EGLSurface mEglSurface; 275 276 GL mGl; 277 HardwareCanvas mCanvas; 278 int mFrameCount; 279 Paint mDebugPaint; 280 281 boolean mDirtyRegions; 282 283 final int mGlVersion; 284 final boolean mTranslucent; 285 286 private boolean mDestroyed; 287 288 private final Rect mRedrawClip = new Rect(); 289 290 GlRenderer(int glVersion, boolean translucent) { 291 mGlVersion = glVersion; 292 mTranslucent = translucent; 293 final String dirtyProperty = System.getProperty(RENDER_DIRTY_REGIONS_PROPERTY, "true"); 294 //noinspection PointlessBooleanExpression,ConstantConditions 295 mDirtyRegions = RENDER_DIRTY_REGIONS && "true".equalsIgnoreCase(dirtyProperty); 296 } 297 298 /** 299 * Return a string for the EGL error code, or the hex representation 300 * if the error is unknown. 301 * 302 * @param error The EGL error to convert into a String. 303 * 304 * @return An error string correponding to the EGL error code. 305 */ 306 static String getEGLErrorString(int error) { 307 switch (error) { 308 case EGL10.EGL_SUCCESS: 309 return "EGL_SUCCESS"; 310 case EGL10.EGL_NOT_INITIALIZED: 311 return "EGL_NOT_INITIALIZED"; 312 case EGL10.EGL_BAD_ACCESS: 313 return "EGL_BAD_ACCESS"; 314 case EGL10.EGL_BAD_ALLOC: 315 return "EGL_BAD_ALLOC"; 316 case EGL10.EGL_BAD_ATTRIBUTE: 317 return "EGL_BAD_ATTRIBUTE"; 318 case EGL10.EGL_BAD_CONFIG: 319 return "EGL_BAD_CONFIG"; 320 case EGL10.EGL_BAD_CONTEXT: 321 return "EGL_BAD_CONTEXT"; 322 case EGL10.EGL_BAD_CURRENT_SURFACE: 323 return "EGL_BAD_CURRENT_SURFACE"; 324 case EGL10.EGL_BAD_DISPLAY: 325 return "EGL_BAD_DISPLAY"; 326 case EGL10.EGL_BAD_MATCH: 327 return "EGL_BAD_MATCH"; 328 case EGL10.EGL_BAD_NATIVE_PIXMAP: 329 return "EGL_BAD_NATIVE_PIXMAP"; 330 case EGL10.EGL_BAD_NATIVE_WINDOW: 331 return "EGL_BAD_NATIVE_WINDOW"; 332 case EGL10.EGL_BAD_PARAMETER: 333 return "EGL_BAD_PARAMETER"; 334 case EGL10.EGL_BAD_SURFACE: 335 return "EGL_BAD_SURFACE"; 336 case EGL11.EGL_CONTEXT_LOST: 337 return "EGL_CONTEXT_LOST"; 338 default: 339 return "0x" + Integer.toHexString(error); 340 } 341 } 342 343 /** 344 * Checks for OpenGL errors. If an error has occured, {@link #destroy(boolean)} 345 * is invoked and the requested flag is turned off. The error code is 346 * also logged as a warning. 347 */ 348 void checkEglErrors() { 349 if (isEnabled()) { 350 int error = sEgl.eglGetError(); 351 if (error != EGL10.EGL_SUCCESS) { 352 // something bad has happened revert to 353 // normal rendering. 354 fallback(error != EGL11.EGL_CONTEXT_LOST); 355 Log.w(LOG_TAG, "EGL error: " + getEGLErrorString(error)); 356 } 357 } 358 } 359 360 private void fallback(boolean fallback) { 361 destroy(true); 362 if (fallback) { 363 // we'll try again if it was context lost 364 setRequested(false); 365 Log.w(LOG_TAG, "Mountain View, we've had a problem here. " 366 + "Switching back to software rendering."); 367 } 368 } 369 370 @Override 371 boolean initialize(SurfaceHolder holder) throws Surface.OutOfResourcesException { 372 if (isRequested() && !isEnabled()) { 373 initializeEgl(); 374 mGl = createEglSurface(holder); 375 mDestroyed = false; 376 377 if (mGl != null) { 378 int err = sEgl.eglGetError(); 379 if (err != EGL10.EGL_SUCCESS) { 380 destroy(true); 381 setRequested(false); 382 } else { 383 if (mCanvas == null) { 384 mCanvas = createCanvas(); 385 } 386 if (mCanvas != null) { 387 setEnabled(true); 388 } else { 389 Log.w(LOG_TAG, "Hardware accelerated Canvas could not be created"); 390 } 391 } 392 393 return mCanvas != null; 394 } 395 } 396 return false; 397 } 398 399 @Override 400 void updateSurface(SurfaceHolder holder) throws Surface.OutOfResourcesException { 401 if (isRequested() && isEnabled()) { 402 createEglSurface(holder); 403 } 404 } 405 406 abstract GLES20Canvas createCanvas(); 407 408 void initializeEgl() { 409 if (sEglContext != null) return; 410 411 sEglThread = Thread.currentThread(); 412 sEgl = (EGL10) EGLContext.getEGL(); 413 414 // Get to the default display. 415 sEglDisplay = sEgl.eglGetDisplay(EGL10.EGL_DEFAULT_DISPLAY); 416 417 if (sEglDisplay == EGL10.EGL_NO_DISPLAY) { 418 throw new RuntimeException("eglGetDisplay failed " 419 + getEGLErrorString(sEgl.eglGetError())); 420 } 421 422 // We can now initialize EGL for that display 423 int[] version = new int[2]; 424 if (!sEgl.eglInitialize(sEglDisplay, version)) { 425 throw new RuntimeException("eglInitialize failed " + 426 getEGLErrorString(sEgl.eglGetError())); 427 } 428 429 sEglConfig = getConfigChooser(mGlVersion).chooseConfig(sEgl, sEglDisplay); 430 if (sEglConfig == null) { 431 // We tried to use EGL_SWAP_BEHAVIOR_PRESERVED_BIT, try again without 432 if (mDirtyRegions) { 433 mDirtyRegions = false; 434 435 sEglConfig = getConfigChooser(mGlVersion).chooseConfig(sEgl, sEglDisplay); 436 if (sEglConfig == null) { 437 throw new RuntimeException("eglConfig not initialized"); 438 } 439 } else { 440 throw new RuntimeException("eglConfig not initialized"); 441 } 442 } 443 444 /* 445 * Create an EGL context. We want to do this as rarely as we can, because an 446 * EGL context is a somewhat heavy object. 447 */ 448 sEglContext = createContext(sEgl, sEglDisplay, sEglConfig); 449 } 450 451 GL createEglSurface(SurfaceHolder holder) throws Surface.OutOfResourcesException { 452 // Check preconditions. 453 if (sEgl == null) { 454 throw new RuntimeException("egl not initialized"); 455 } 456 if (sEglDisplay == null) { 457 throw new RuntimeException("eglDisplay not initialized"); 458 } 459 if (sEglConfig == null) { 460 throw new RuntimeException("eglConfig not initialized"); 461 } 462 if (Thread.currentThread() != sEglThread) { 463 throw new IllegalStateException("HardwareRenderer cannot be used " 464 + "from multiple threads"); 465 } 466 467 /* 468 * The window size has changed, so we need to create a new 469 * surface. 470 */ 471 if (mEglSurface != null && mEglSurface != EGL10.EGL_NO_SURFACE) { 472 /* 473 * Unbind and destroy the old EGL surface, if 474 * there is one. 475 */ 476 sEgl.eglMakeCurrent(sEglDisplay, EGL10.EGL_NO_SURFACE, 477 EGL10.EGL_NO_SURFACE, EGL10.EGL_NO_CONTEXT); 478 sEgl.eglDestroySurface(sEglDisplay, mEglSurface); 479 } 480 481 // Create an EGL surface we can render into. 482 mEglSurface = sEgl.eglCreateWindowSurface(sEglDisplay, sEglConfig, holder, null); 483 484 if (mEglSurface == null || mEglSurface == EGL10.EGL_NO_SURFACE) { 485 int error = sEgl.eglGetError(); 486 if (error == EGL10.EGL_BAD_NATIVE_WINDOW) { 487 Log.e(LOG_TAG, "createWindowSurface returned EGL_BAD_NATIVE_WINDOW."); 488 return null; 489 } 490 throw new RuntimeException("createWindowSurface failed " 491 + getEGLErrorString(error)); 492 } 493 494 /* 495 * Before we can issue GL commands, we need to make sure 496 * the context is current and bound to a surface. 497 */ 498 if (!sEgl.eglMakeCurrent(sEglDisplay, mEglSurface, mEglSurface, sEglContext)) { 499 throw new Surface.OutOfResourcesException("eglMakeCurrent failed " 500 + getEGLErrorString(sEgl.eglGetError())); 501 } 502 503 if (mDirtyRegions) { 504 if (!GLES20Canvas.preserveBackBuffer()) { 505 Log.w(LOG_TAG, "Backbuffer cannot be preserved"); 506 } 507 } 508 509 return sEglContext.getGL(); 510 } 511 512 EGLContext createContext(EGL10 egl, EGLDisplay eglDisplay, EGLConfig eglConfig) { 513 int[] attrib_list = { EGL_CONTEXT_CLIENT_VERSION, mGlVersion, EGL10.EGL_NONE }; 514 515 return egl.eglCreateContext(eglDisplay, eglConfig, EGL10.EGL_NO_CONTEXT, 516 mGlVersion != 0 ? attrib_list : null); 517 } 518 519 @Override 520 void initializeIfNeeded(int width, int height, View.AttachInfo attachInfo, 521 SurfaceHolder holder) throws Surface.OutOfResourcesException { 522 if (isRequested()) { 523 checkEglErrors(); 524 super.initializeIfNeeded(width, height, attachInfo, holder); 525 } 526 } 527 528 @Override 529 void destroy(boolean full) { 530 if (full && mCanvas != null) { 531 mCanvas = null; 532 } 533 534 if (!isEnabled() || mDestroyed) return; 535 536 mDestroyed = true; 537 538 sEgl.eglMakeCurrent(sEglDisplay, EGL10.EGL_NO_SURFACE, 539 EGL10.EGL_NO_SURFACE, EGL10.EGL_NO_CONTEXT); 540 sEgl.eglDestroySurface(sEglDisplay, mEglSurface); 541 542 mEglSurface = null; 543 mGl = null; 544 545 setEnabled(false); 546 } 547 548 @Override 549 void setup(int width, int height) { 550 mCanvas.setViewport(width, height); 551 } 552 553 boolean canDraw() { 554 return mGl != null && mCanvas != null; 555 } 556 557 void onPreDraw(Rect dirty) { 558 } 559 560 void onPostDraw() { 561 } 562 563 /** 564 * Defines the EGL configuration for this renderer. 565 * 566 * @return An {@link android.view.HardwareRenderer.GlRenderer.EglConfigChooser}. 567 */ 568 EglConfigChooser getConfigChooser(int glVersion) { 569 return new ComponentSizeChooser(glVersion, 8, 8, 8, 8, 0, 0, mDirtyRegions); 570 } 571 572 @Override 573 void draw(View view, View.AttachInfo attachInfo, HardwareDrawCallbacks callbacks, 574 Rect dirty) { 575 if (canDraw()) { 576 if (!mDirtyRegions) { 577 dirty = null; 578 } 579 580 attachInfo.mDrawingTime = SystemClock.uptimeMillis(); 581 attachInfo.mIgnoreDirtyState = true; 582 view.mPrivateFlags |= View.DRAWN; 583 584 long startTime; 585 if (ViewDebug.DEBUG_PROFILE_DRAWING) { 586 startTime = SystemClock.elapsedRealtime(); 587 } 588 589 final int surfaceState = checkCurrent(); 590 if (surfaceState != SURFACE_STATE_ERROR) { 591 // We had to change the current surface and/or context, redraw everything 592 if (surfaceState == SURFACE_STATE_UPDATED) { 593 dirty = null; 594 } 595 596 onPreDraw(dirty); 597 598 HardwareCanvas canvas = mCanvas; 599 attachInfo.mHardwareCanvas = canvas; 600 601 int saveCount = canvas.save(); 602 callbacks.onHardwarePreDraw(canvas); 603 604 try { 605 view.mRecreateDisplayList = 606 (view.mPrivateFlags & View.INVALIDATED) == View.INVALIDATED; 607 view.mPrivateFlags &= ~View.INVALIDATED; 608 609 DisplayList displayList = view.getDisplayList(); 610 if (displayList != null) { 611 if (canvas.drawDisplayList(displayList, mRedrawClip)) { 612 if (mRedrawClip.isEmpty()) { 613 view.invalidate(); 614 } else { 615 view.getParent().invalidateChild(view, mRedrawClip); 616 } 617 mRedrawClip.setEmpty(); 618 } 619 } else { 620 // Shouldn't reach here 621 view.draw(canvas); 622 } 623 624 if (DEBUG_DIRTY_REGION) { 625 if (mDebugPaint == null) { 626 mDebugPaint = new Paint(); 627 mDebugPaint.setColor(0x7fff0000); 628 } 629 if (dirty != null && (mFrameCount++ & 1) == 0) { 630 canvas.drawRect(dirty, mDebugPaint); 631 } 632 } 633 } finally { 634 callbacks.onHardwarePostDraw(canvas); 635 canvas.restoreToCount(saveCount); 636 view.mRecreateDisplayList = false; 637 } 638 639 onPostDraw(); 640 641 if (ViewDebug.DEBUG_PROFILE_DRAWING) { 642 EventLog.writeEvent(60000, SystemClock.elapsedRealtime() - startTime); 643 } 644 645 attachInfo.mIgnoreDirtyState = false; 646 647 sEgl.eglSwapBuffers(sEglDisplay, mEglSurface); 648 checkEglErrors(); 649 } 650 } 651 } 652 653 private int checkCurrent() { 654 // TODO: Don't check the current context when we have one per UI thread 655 // TODO: Use a threadlocal flag to know whether the surface has changed 656 if (!sEglContext.equals(sEgl.eglGetCurrentContext()) || 657 !mEglSurface.equals(sEgl.eglGetCurrentSurface(EGL10.EGL_DRAW))) { 658 if (!sEgl.eglMakeCurrent(sEglDisplay, mEglSurface, mEglSurface, sEglContext)) { 659 fallback(true); 660 Log.e(LOG_TAG, "eglMakeCurrent failed " + 661 getEGLErrorString(sEgl.eglGetError())); 662 return SURFACE_STATE_ERROR; 663 } else { 664 return SURFACE_STATE_UPDATED; 665 } 666 } 667 return SURFACE_STATE_SUCCESS; 668 } 669 670 static abstract class EglConfigChooser { 671 final int[] mConfigSpec; 672 private final int mGlVersion; 673 674 EglConfigChooser(int glVersion, int[] configSpec) { 675 mGlVersion = glVersion; 676 mConfigSpec = filterConfigSpec(configSpec); 677 } 678 679 EGLConfig chooseConfig(EGL10 egl, EGLDisplay display) { 680 int[] index = new int[1]; 681 if (!egl.eglChooseConfig(display, mConfigSpec, null, 0, index)) { 682 throw new IllegalArgumentException("eglChooseConfig failed " 683 + getEGLErrorString(egl.eglGetError())); 684 } 685 686 int numConfigs = index[0]; 687 if (numConfigs <= 0) { 688 throw new IllegalArgumentException("No configs match configSpec"); 689 } 690 691 EGLConfig[] configs = new EGLConfig[numConfigs]; 692 if (!egl.eglChooseConfig(display, mConfigSpec, configs, numConfigs, index)) { 693 throw new IllegalArgumentException("eglChooseConfig failed " 694 + getEGLErrorString(egl.eglGetError())); 695 } 696 697 EGLConfig config = chooseConfig(egl, display, configs); 698 if (config == null) { 699 throw new IllegalArgumentException("No config chosen"); 700 } 701 702 return config; 703 } 704 705 abstract EGLConfig chooseConfig(EGL10 egl, EGLDisplay display, EGLConfig[] configs); 706 707 private int[] filterConfigSpec(int[] configSpec) { 708 if (mGlVersion != 2) { 709 return configSpec; 710 } 711 /* We know none of the subclasses define EGL_RENDERABLE_TYPE. 712 * And we know the configSpec is well formed. 713 */ 714 int len = configSpec.length; 715 int[] newConfigSpec = new int[len + 2]; 716 System.arraycopy(configSpec, 0, newConfigSpec, 0, len - 1); 717 newConfigSpec[len - 1] = EGL10.EGL_RENDERABLE_TYPE; 718 newConfigSpec[len] = 4; /* EGL_OPENGL_ES2_BIT */ 719 newConfigSpec[len + 1] = EGL10.EGL_NONE; 720 return newConfigSpec; 721 } 722 } 723 724 /** 725 * Choose a configuration with exactly the specified r,g,b,a sizes, 726 * and at least the specified depth and stencil sizes. 727 */ 728 static class ComponentSizeChooser extends EglConfigChooser { 729 private int[] mValue; 730 731 private final int mRedSize; 732 private final int mGreenSize; 733 private final int mBlueSize; 734 private final int mAlphaSize; 735 private final int mDepthSize; 736 private final int mStencilSize; 737 private final boolean mDirtyRegions; 738 739 ComponentSizeChooser(int glVersion, int redSize, int greenSize, int blueSize, 740 int alphaSize, int depthSize, int stencilSize, boolean dirtyRegions) { 741 super(glVersion, new int[] { 742 EGL10.EGL_RED_SIZE, redSize, 743 EGL10.EGL_GREEN_SIZE, greenSize, 744 EGL10.EGL_BLUE_SIZE, blueSize, 745 EGL10.EGL_ALPHA_SIZE, alphaSize, 746 EGL10.EGL_DEPTH_SIZE, depthSize, 747 EGL10.EGL_STENCIL_SIZE, stencilSize, 748 EGL_SURFACE_TYPE, EGL10.EGL_WINDOW_BIT | 749 (dirtyRegions ? EGL_SWAP_BEHAVIOR_PRESERVED_BIT : 0), 750 EGL10.EGL_NONE }); 751 mValue = new int[1]; 752 mRedSize = redSize; 753 mGreenSize = greenSize; 754 mBlueSize = blueSize; 755 mAlphaSize = alphaSize; 756 mDepthSize = depthSize; 757 mStencilSize = stencilSize; 758 mDirtyRegions = dirtyRegions; 759 } 760 761 @Override 762 EGLConfig chooseConfig(EGL10 egl, EGLDisplay display, EGLConfig[] configs) { 763 for (EGLConfig config : configs) { 764 int d = findConfigAttrib(egl, display, config, EGL10.EGL_DEPTH_SIZE, 0); 765 int s = findConfigAttrib(egl, display, config, EGL10.EGL_STENCIL_SIZE, 0); 766 if (d >= mDepthSize && s >= mStencilSize) { 767 int r = findConfigAttrib(egl, display, config, EGL10.EGL_RED_SIZE, 0); 768 int g = findConfigAttrib(egl, display, config, EGL10.EGL_GREEN_SIZE, 0); 769 int b = findConfigAttrib(egl, display, config, EGL10.EGL_BLUE_SIZE, 0); 770 int a = findConfigAttrib(egl, display, config, EGL10.EGL_ALPHA_SIZE, 0); 771 boolean backBuffer; 772 if (mDirtyRegions) { 773 int surfaceType = findConfigAttrib(egl, display, config, 774 EGL_SURFACE_TYPE, 0); 775 backBuffer = (surfaceType & EGL_SWAP_BEHAVIOR_PRESERVED_BIT) != 0; 776 } else { 777 backBuffer = true; 778 } 779 if (r >= mRedSize && g >= mGreenSize && b >= mBlueSize && a >= mAlphaSize 780 && backBuffer) { 781 return config; 782 } 783 } 784 } 785 return null; 786 } 787 788 private int findConfigAttrib(EGL10 egl, EGLDisplay display, EGLConfig config, 789 int attribute, int defaultValue) { 790 if (egl.eglGetConfigAttrib(display, config, attribute, mValue)) { 791 return mValue[0]; 792 } 793 794 return defaultValue; 795 } 796 } 797 } 798 799 /** 800 * Hardware renderer using OpenGL ES 2.0. 801 */ 802 static class Gl20Renderer extends GlRenderer { 803 private GLES20Canvas mGlCanvas; 804 805 Gl20Renderer(boolean translucent) { 806 super(2, translucent); 807 } 808 809 @Override 810 GLES20Canvas createCanvas() { 811 return mGlCanvas = new GLES20Canvas(mTranslucent); 812 } 813 814 @Override 815 boolean canDraw() { 816 return super.canDraw() && mGlCanvas != null; 817 } 818 819 @Override 820 void onPreDraw(Rect dirty) { 821 mGlCanvas.onPreDraw(dirty); 822 } 823 824 @Override 825 void onPostDraw() { 826 mGlCanvas.onPostDraw(); 827 } 828 829 @Override 830 void destroy(boolean full) { 831 try { 832 super.destroy(full); 833 } finally { 834 if (full && mGlCanvas != null) { 835 mGlCanvas = null; 836 } 837 } 838 } 839 840 @Override 841 DisplayList createDisplayList(View v) { 842 return new GLES20DisplayList(v); 843 } 844 845 @Override 846 HardwareLayer createHardwareLayer(int width, int height, boolean isOpaque) { 847 return new GLES20Layer(width, height, isOpaque); 848 } 849 850 static HardwareRenderer create(boolean translucent) { 851 if (GLES20Canvas.isAvailable()) { 852 return new Gl20Renderer(translucent); 853 } 854 return null; 855 } 856 } 857} 858