1 /* 2 * Copyright (C) 2009 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 package com.android.systemui; 18 19 import android.app.ActivityManager; 20 import android.app.WallpaperManager; 21 import android.content.BroadcastReceiver; 22 import android.content.Context; 23 import android.content.Intent; 24 import android.graphics.Bitmap; 25 import android.graphics.Canvas; 26 import android.graphics.Rect; 27 import android.graphics.Region.Op; 28 import android.opengl.GLUtils; 29 import android.os.SystemProperties; 30 import android.renderscript.Matrix4f; 31 import android.service.wallpaper.WallpaperService; 32 import android.util.Log; 33 import android.view.Display; 34 import android.view.MotionEvent; 35 import android.view.SurfaceHolder; 36 import android.view.WindowManager; 37 38 import javax.microedition.khronos.egl.EGL10; 39 import javax.microedition.khronos.egl.EGLConfig; 40 import javax.microedition.khronos.egl.EGLContext; 41 import javax.microedition.khronos.egl.EGLDisplay; 42 import javax.microedition.khronos.egl.EGLSurface; 43 import javax.microedition.khronos.opengles.GL; 44 import java.io.IOException; 45 import java.nio.ByteBuffer; 46 import java.nio.ByteOrder; 47 import java.nio.FloatBuffer; 48 49 import static android.opengl.GLES20.*; 50 import static javax.microedition.khronos.egl.EGL10.*; 51 52 /** 53 * Default built-in wallpaper that simply shows a static image. 54 */ 55 @SuppressWarnings({"UnusedDeclaration"}) 56 public class ImageWallpaper extends WallpaperService { 57 private static final String TAG = "ImageWallpaper"; 58 private static final String GL_LOG_TAG = "ImageWallpaperGL"; 59 private static final boolean DEBUG = false; 60 private static final String PROPERTY_KERNEL_QEMU = "ro.kernel.qemu"; 61 62 static final boolean FIXED_SIZED_SURFACE = true; 63 static final boolean USE_OPENGL = true; 64 65 WallpaperManager mWallpaperManager; 66 67 boolean mIsHwAccelerated; 68 69 @Override 70 public void onCreate() { 71 super.onCreate(); 72 mWallpaperManager = (WallpaperManager) getSystemService(WALLPAPER_SERVICE); 73 74 //noinspection PointlessBooleanExpression,ConstantConditions 75 if (FIXED_SIZED_SURFACE && USE_OPENGL) { 76 if (!isEmulator()) { 77 WindowManager windowManager = 78 (WindowManager) getSystemService(Context.WINDOW_SERVICE); 79 Display display = windowManager.getDefaultDisplay(); 80 mIsHwAccelerated = ActivityManager.isHighEndGfx(display); 81 } 82 } 83 } 84 85 private static boolean isEmulator() { 86 return "1".equals(SystemProperties.get(PROPERTY_KERNEL_QEMU, "0")); 87 } 88 89 public Engine onCreateEngine() { 90 return new DrawableEngine(); 91 } 92 93 class DrawableEngine extends Engine { 94 static final int EGL_CONTEXT_CLIENT_VERSION = 0x3098; 95 static final int EGL_OPENGL_ES2_BIT = 4; 96 97 private final Object mLock = new Object[0]; 98 99 // TODO: Not currently used, keeping around until we know we don't need it 100 @SuppressWarnings({"UnusedDeclaration"}) 101 private WallpaperObserver mReceiver; 102 103 Bitmap mBackground; 104 int mBackgroundWidth = -1, mBackgroundHeight = -1; 105 float mXOffset; 106 float mYOffset; 107 108 boolean mVisible = true; 109 boolean mRedrawNeeded; 110 boolean mOffsetsChanged; 111 int mLastXTranslation; 112 int mLastYTranslation; 113 114 private EGL10 mEgl; 115 private EGLDisplay mEglDisplay; 116 private EGLConfig mEglConfig; 117 private EGLContext mEglContext; 118 private EGLSurface mEglSurface; 119 private GL mGL; 120 121 private static final String sSimpleVS = 122 "attribute vec4 position;\n" + 123 "attribute vec2 texCoords;\n" + 124 "varying vec2 outTexCoords;\n" + 125 "uniform mat4 projection;\n" + 126 "\nvoid main(void) {\n" + 127 " outTexCoords = texCoords;\n" + 128 " gl_Position = projection * position;\n" + 129 "}\n\n"; 130 private static final String sSimpleFS = 131 "precision mediump float;\n\n" + 132 "varying vec2 outTexCoords;\n" + 133 "uniform sampler2D texture;\n" + 134 "\nvoid main(void) {\n" + 135 " gl_FragColor = texture2D(texture, outTexCoords);\n" + 136 "}\n\n"; 137 138 private static final int FLOAT_SIZE_BYTES = 4; 139 private static final int TRIANGLE_VERTICES_DATA_STRIDE_BYTES = 5 * FLOAT_SIZE_BYTES; 140 private static final int TRIANGLE_VERTICES_DATA_POS_OFFSET = 0; 141 private static final int TRIANGLE_VERTICES_DATA_UV_OFFSET = 3; 142 143 class WallpaperObserver extends BroadcastReceiver { 144 public void onReceive(Context context, Intent intent) { 145 if (DEBUG) { 146 Log.d(TAG, "onReceive"); 147 } 148 149 synchronized (mLock) { 150 mBackgroundWidth = mBackgroundHeight = -1; 151 mBackground = null; 152 mRedrawNeeded = true; 153 drawFrameLocked(); 154 } 155 } 156 } 157 158 @Override 159 public void onCreate(SurfaceHolder surfaceHolder) { 160 if (DEBUG) { 161 Log.d(TAG, "onCreate"); 162 } 163 164 super.onCreate(surfaceHolder); 165 166 // TODO: Don't need this currently because the wallpaper service 167 // will restart the image wallpaper whenever the image changes. 168 //IntentFilter filter = new IntentFilter(Intent.ACTION_WALLPAPER_CHANGED); 169 //mReceiver = new WallpaperObserver(); 170 //registerReceiver(mReceiver, filter, null, mHandler); 171 172 updateSurfaceSize(surfaceHolder); 173 174 setOffsetNotificationsEnabled(false); 175 } 176 177 @Override 178 public void onDestroy() { 179 super.onDestroy(); 180 if (mReceiver != null) { 181 unregisterReceiver(mReceiver); 182 } 183 } 184 185 @Override 186 public void onDesiredSizeChanged(int desiredWidth, int desiredHeight) { 187 super.onDesiredSizeChanged(desiredWidth, desiredHeight); 188 SurfaceHolder surfaceHolder = getSurfaceHolder(); 189 if (surfaceHolder != null) { 190 updateSurfaceSize(surfaceHolder); 191 } 192 } 193 194 void updateSurfaceSize(SurfaceHolder surfaceHolder) { 195 if (FIXED_SIZED_SURFACE) { 196 // Used a fixed size surface, because we are special. We can do 197 // this because we know the current design of window animations doesn't 198 // cause this to break. 199 surfaceHolder.setFixedSize(getDesiredMinimumWidth(), getDesiredMinimumHeight()); 200 } else { 201 surfaceHolder.setSizeFromLayout(); 202 } 203 } 204 205 @Override 206 public void onVisibilityChanged(boolean visible) { 207 if (DEBUG) { 208 Log.d(TAG, "onVisibilityChanged: visible=" + visible); 209 } 210 211 synchronized (mLock) { 212 if (mVisible != visible) { 213 if (DEBUG) { 214 Log.d(TAG, "Visibility changed to visible=" + visible); 215 } 216 mVisible = visible; 217 drawFrameLocked(); 218 } 219 } 220 } 221 222 @Override 223 public void onTouchEvent(MotionEvent event) { 224 super.onTouchEvent(event); 225 } 226 227 @Override 228 public void onOffsetsChanged(float xOffset, float yOffset, 229 float xOffsetStep, float yOffsetStep, 230 int xPixels, int yPixels) { 231 if (DEBUG) { 232 Log.d(TAG, "onOffsetsChanged: xOffset=" + xOffset + ", yOffset=" + yOffset 233 + ", xOffsetStep=" + xOffsetStep + ", yOffsetStep=" + yOffsetStep 234 + ", xPixels=" + xPixels + ", yPixels=" + yPixels); 235 } 236 237 synchronized (mLock) { 238 if (mXOffset != xOffset || mYOffset != yOffset) { 239 if (DEBUG) { 240 Log.d(TAG, "Offsets changed to (" + xOffset + "," + yOffset + ")."); 241 } 242 mXOffset = xOffset; 243 mYOffset = yOffset; 244 mOffsetsChanged = true; 245 } 246 drawFrameLocked(); 247 } 248 } 249 250 @Override 251 public void onSurfaceChanged(SurfaceHolder holder, int format, int width, int height) { 252 if (DEBUG) { 253 Log.d(TAG, "onSurfaceChanged: width=" + width + ", height=" + height); 254 } 255 256 super.onSurfaceChanged(holder, format, width, height); 257 258 synchronized (mLock) { 259 mRedrawNeeded = true; 260 drawFrameLocked(); 261 } 262 } 263 264 void drawFrameLocked() { 265 if (!mVisible) { 266 if (DEBUG) { 267 Log.d(TAG, "Suppressed drawFrame since wallpaper is not visible."); 268 } 269 return; 270 } 271 if (!mRedrawNeeded && !mOffsetsChanged) { 272 if (DEBUG) { 273 Log.d(TAG, "Suppressed drawFrame since redraw is not needed " 274 + "and offsets have not changed."); 275 } 276 return; 277 } 278 279 if (mBackgroundWidth < 0 || mBackgroundHeight < 0) { 280 // If we don't yet know the size of the wallpaper bitmap, 281 // we need to get it now. 282 updateWallpaperLocked(); 283 } 284 285 SurfaceHolder sh = getSurfaceHolder(); 286 final Rect frame = sh.getSurfaceFrame(); 287 final int dw = frame.width(); 288 final int dh = frame.height(); 289 final int availw = dw - mBackgroundWidth; 290 final int availh = dh - mBackgroundHeight; 291 int xPixels = availw < 0 ? (int)(availw * mXOffset + .5f) : (availw / 2); 292 int yPixels = availh < 0 ? (int)(availh * mYOffset + .5f) : (availh / 2); 293 294 mOffsetsChanged = false; 295 if (!mRedrawNeeded && xPixels == mLastXTranslation && yPixels == mLastYTranslation) { 296 if (DEBUG) { 297 Log.d(TAG, "Suppressed drawFrame since the image has not " 298 + "actually moved an integral number of pixels."); 299 } 300 return; 301 } 302 mRedrawNeeded = false; 303 mLastXTranslation = xPixels; 304 mLastYTranslation = yPixels; 305 306 if (mBackground == null) { 307 // If we somehow got to this point after we have last flushed 308 // the wallpaper, well we really need it to draw again. So 309 // seems like we need to reload it. Ouch. 310 updateWallpaperLocked(); 311 } 312 313 if (mIsHwAccelerated) { 314 if (!drawWallpaperWithOpenGL(sh, availw, availh, xPixels, yPixels)) { 315 drawWallpaperWithCanvas(sh, availw, availh, xPixels, yPixels); 316 } 317 } else { 318 drawWallpaperWithCanvas(sh, availw, availh, xPixels, yPixels); 319 } 320 321 if (FIXED_SIZED_SURFACE) { 322 // If the surface is fixed-size, we should only need to 323 // draw it once and then we'll let the window manager 324 // position it appropriately. As such, we no longer needed 325 // the loaded bitmap. Yay! 326 mBackground = null; 327 mWallpaperManager.forgetLoadedWallpaper(); 328 } 329 } 330 331 void updateWallpaperLocked() { 332 Throwable exception = null; 333 try { 334 mBackground = mWallpaperManager.getBitmap(); 335 } catch (RuntimeException e) { 336 exception = e; 337 } catch (OutOfMemoryError e) { 338 exception = e; 339 } 340 341 if (exception != null) { 342 mBackground = null; 343 // Note that if we do fail at this, and the default wallpaper can't 344 // be loaded, we will go into a cycle. Don't do a build where the 345 // default wallpaper can't be loaded. 346 Log.w(TAG, "Unable to load wallpaper!", exception); 347 try { 348 mWallpaperManager.clear(); 349 } catch (IOException ex) { 350 // now we're really screwed. 351 Log.w(TAG, "Unable reset to default wallpaper!", ex); 352 } 353 } 354 355 mBackgroundWidth = mBackground != null ? mBackground.getWidth() : 0; 356 mBackgroundHeight = mBackground != null ? mBackground.getHeight() : 0; 357 } 358 359 private void drawWallpaperWithCanvas(SurfaceHolder sh, int w, int h, int x, int y) { 360 Canvas c = sh.lockCanvas(); 361 if (c != null) { 362 try { 363 if (DEBUG) { 364 Log.d(TAG, "Redrawing: x=" + x + ", y=" + y); 365 } 366 367 c.translate(x, y); 368 if (w < 0 || h < 0) { 369 c.save(Canvas.CLIP_SAVE_FLAG); 370 c.clipRect(0, 0, mBackgroundWidth, mBackgroundHeight, Op.DIFFERENCE); 371 c.drawColor(0xff000000); 372 c.restore(); 373 } 374 if (mBackground != null) { 375 c.drawBitmap(mBackground, 0, 0, null); 376 } 377 } finally { 378 sh.unlockCanvasAndPost(c); 379 } 380 } 381 } 382 383 private boolean drawWallpaperWithOpenGL(SurfaceHolder sh, int w, int h, int left, int top) { 384 if (!initGL(sh)) return false; 385 386 final float right = left + mBackgroundWidth; 387 final float bottom = top + mBackgroundHeight; 388 389 final Rect frame = sh.getSurfaceFrame(); 390 391 final Matrix4f ortho = new Matrix4f(); 392 ortho.loadOrtho(0.0f, frame.width(), frame.height(), 0.0f, -1.0f, 1.0f); 393 394 final FloatBuffer triangleVertices = createMesh(left, top, right, bottom); 395 396 final int texture = loadTexture(mBackground); 397 final int program = buildProgram(sSimpleVS, sSimpleFS); 398 399 final int attribPosition = glGetAttribLocation(program, "position"); 400 final int attribTexCoords = glGetAttribLocation(program, "texCoords"); 401 final int uniformTexture = glGetUniformLocation(program, "texture"); 402 final int uniformProjection = glGetUniformLocation(program, "projection"); 403 404 checkGlError(); 405 406 glViewport(0, 0, frame.width(), frame.height()); 407 glBindTexture(GL_TEXTURE_2D, texture); 408 409 glUseProgram(program); 410 glEnableVertexAttribArray(attribPosition); 411 glEnableVertexAttribArray(attribTexCoords); 412 glUniform1i(uniformTexture, 0); 413 glUniformMatrix4fv(uniformProjection, 1, false, ortho.getArray(), 0); 414 415 checkGlError(); 416 417 if (w < 0 || h < 0) { 418 glClearColor(0.0f, 0.0f, 0.0f, 0.0f); 419 glClear(GL_COLOR_BUFFER_BIT); 420 } 421 422 // drawQuad 423 triangleVertices.position(TRIANGLE_VERTICES_DATA_POS_OFFSET); 424 glVertexAttribPointer(attribPosition, 3, GL_FLOAT, false, 425 TRIANGLE_VERTICES_DATA_STRIDE_BYTES, triangleVertices); 426 427 triangleVertices.position(TRIANGLE_VERTICES_DATA_UV_OFFSET); 428 glVertexAttribPointer(attribTexCoords, 3, GL_FLOAT, false, 429 TRIANGLE_VERTICES_DATA_STRIDE_BYTES, triangleVertices); 430 431 glDrawArrays(GL_TRIANGLE_STRIP, 0, 4); 432 433 if (!mEgl.eglSwapBuffers(mEglDisplay, mEglSurface)) { 434 throw new RuntimeException("Cannot swap buffers"); 435 } 436 checkEglError(); 437 438 finishGL(); 439 440 return true; 441 } 442 443 private FloatBuffer createMesh(int left, int top, float right, float bottom) { 444 final float[] verticesData = { 445 // X, Y, Z, U, V 446 left, bottom, 0.0f, 0.0f, 1.0f, 447 right, bottom, 0.0f, 1.0f, 1.0f, 448 left, top, 0.0f, 0.0f, 0.0f, 449 right, top, 0.0f, 1.0f, 0.0f, 450 }; 451 452 final int bytes = verticesData.length * FLOAT_SIZE_BYTES; 453 final FloatBuffer triangleVertices = ByteBuffer.allocateDirect(bytes).order( 454 ByteOrder.nativeOrder()).asFloatBuffer(); 455 triangleVertices.put(verticesData).position(0); 456 return triangleVertices; 457 } 458 459 private int loadTexture(Bitmap bitmap) { 460 int[] textures = new int[1]; 461 462 glActiveTexture(GL_TEXTURE0); 463 glGenTextures(1, textures, 0); 464 checkGlError(); 465 466 int texture = textures[0]; 467 glBindTexture(GL_TEXTURE_2D, texture); 468 checkGlError(); 469 470 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); 471 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); 472 473 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); 474 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); 475 476 GLUtils.texImage2D(GL_TEXTURE_2D, 0, GL_RGBA, bitmap, GL_UNSIGNED_BYTE, 0); 477 checkGlError(); 478 479 bitmap.recycle(); 480 481 return texture; 482 } 483 484 private int buildProgram(String vertex, String fragment) { 485 int vertexShader = buildShader(vertex, GL_VERTEX_SHADER); 486 if (vertexShader == 0) return 0; 487 488 int fragmentShader = buildShader(fragment, GL_FRAGMENT_SHADER); 489 if (fragmentShader == 0) return 0; 490 491 int program = glCreateProgram(); 492 glAttachShader(program, vertexShader); 493 checkGlError(); 494 495 glAttachShader(program, fragmentShader); 496 checkGlError(); 497 498 glLinkProgram(program); 499 checkGlError(); 500 501 int[] status = new int[1]; 502 glGetProgramiv(program, GL_LINK_STATUS, status, 0); 503 if (status[0] != GL_TRUE) { 504 String error = glGetProgramInfoLog(program); 505 Log.d(GL_LOG_TAG, "Error while linking program:\n" + error); 506 glDeleteShader(vertexShader); 507 glDeleteShader(fragmentShader); 508 glDeleteProgram(program); 509 return 0; 510 } 511 512 return program; 513 } 514 515 private int buildShader(String source, int type) { 516 int shader = glCreateShader(type); 517 518 glShaderSource(shader, source); 519 checkGlError(); 520 521 glCompileShader(shader); 522 checkGlError(); 523 524 int[] status = new int[1]; 525 glGetShaderiv(shader, GL_COMPILE_STATUS, status, 0); 526 if (status[0] != GL_TRUE) { 527 String error = glGetShaderInfoLog(shader); 528 Log.d(GL_LOG_TAG, "Error while compiling shader:\n" + error); 529 glDeleteShader(shader); 530 return 0; 531 } 532 533 return shader; 534 } 535 536 private void checkEglError() { 537 int error = mEgl.eglGetError(); 538 if (error != EGL_SUCCESS) { 539 Log.w(GL_LOG_TAG, "EGL error = " + GLUtils.getEGLErrorString(error)); 540 } 541 } 542 543 private void checkGlError() { 544 int error = glGetError(); 545 if (error != GL_NO_ERROR) { 546 Log.w(GL_LOG_TAG, "GL error = 0x" + Integer.toHexString(error), new Throwable()); 547 } 548 } 549 550 private void finishGL() { 551 mEgl.eglMakeCurrent(mEglDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT); 552 mEgl.eglDestroySurface(mEglDisplay, mEglSurface); 553 mEgl.eglDestroyContext(mEglDisplay, mEglContext); 554 } 555 556 private boolean initGL(SurfaceHolder surfaceHolder) { 557 mEgl = (EGL10) EGLContext.getEGL(); 558 559 mEglDisplay = mEgl.eglGetDisplay(EGL_DEFAULT_DISPLAY); 560 if (mEglDisplay == EGL_NO_DISPLAY) { 561 throw new RuntimeException("eglGetDisplay failed " + 562 GLUtils.getEGLErrorString(mEgl.eglGetError())); 563 } 564 565 int[] version = new int[2]; 566 if (!mEgl.eglInitialize(mEglDisplay, version)) { 567 throw new RuntimeException("eglInitialize failed " + 568 GLUtils.getEGLErrorString(mEgl.eglGetError())); 569 } 570 571 mEglConfig = chooseEglConfig(); 572 if (mEglConfig == null) { 573 throw new RuntimeException("eglConfig not initialized"); 574 } 575 576 mEglContext = createContext(mEgl, mEglDisplay, mEglConfig); 577 578 mEglSurface = mEgl.eglCreateWindowSurface(mEglDisplay, mEglConfig, surfaceHolder, null); 579 580 if (mEglSurface == null || mEglSurface == EGL_NO_SURFACE) { 581 int error = mEgl.eglGetError(); 582 if (error == EGL_BAD_NATIVE_WINDOW) { 583 Log.e(GL_LOG_TAG, "createWindowSurface returned EGL_BAD_NATIVE_WINDOW."); 584 return false; 585 } 586 throw new RuntimeException("createWindowSurface failed " + 587 GLUtils.getEGLErrorString(error)); 588 } 589 590 if (!mEgl.eglMakeCurrent(mEglDisplay, mEglSurface, mEglSurface, mEglContext)) { 591 throw new RuntimeException("eglMakeCurrent failed " + 592 GLUtils.getEGLErrorString(mEgl.eglGetError())); 593 } 594 595 mGL = mEglContext.getGL(); 596 597 return true; 598 } 599 600 601 EGLContext createContext(EGL10 egl, EGLDisplay eglDisplay, EGLConfig eglConfig) { 602 int[] attrib_list = { EGL_CONTEXT_CLIENT_VERSION, 2, EGL_NONE }; 603 return egl.eglCreateContext(eglDisplay, eglConfig, EGL_NO_CONTEXT, attrib_list); 604 } 605 606 private EGLConfig chooseEglConfig() { 607 int[] configsCount = new int[1]; 608 EGLConfig[] configs = new EGLConfig[1]; 609 int[] configSpec = getConfig(); 610 if (!mEgl.eglChooseConfig(mEglDisplay, configSpec, configs, 1, configsCount)) { 611 throw new IllegalArgumentException("eglChooseConfig failed " + 612 GLUtils.getEGLErrorString(mEgl.eglGetError())); 613 } else if (configsCount[0] > 0) { 614 return configs[0]; 615 } 616 return null; 617 } 618 619 private int[] getConfig() { 620 return new int[] { 621 EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT, 622 EGL_RED_SIZE, 8, 623 EGL_GREEN_SIZE, 8, 624 EGL_BLUE_SIZE, 8, 625 EGL_ALPHA_SIZE, 0, 626 EGL_DEPTH_SIZE, 0, 627 EGL_STENCIL_SIZE, 0, 628 EGL_NONE 629 }; 630 } 631 } 632 } 633
