/* * Copyright (C) 2009 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.android.systemui; import android.app.ActivityManager; import android.app.WallpaperManager; import android.content.BroadcastReceiver; import android.content.ComponentCallbacks2; import android.content.Context; import android.content.Intent; import android.graphics.Bitmap; import android.graphics.Canvas; import android.graphics.Rect; import android.graphics.Region.Op; import android.opengl.GLUtils; import android.os.SystemProperties; import android.renderscript.Matrix4f; import android.service.wallpaper.WallpaperService; import android.util.Log; import android.view.MotionEvent; import android.view.SurfaceHolder; import android.view.WindowManager; import javax.microedition.khronos.egl.EGL10; import javax.microedition.khronos.egl.EGLConfig; import javax.microedition.khronos.egl.EGLContext; import javax.microedition.khronos.egl.EGLDisplay; import javax.microedition.khronos.egl.EGLSurface; import java.io.IOException; import java.nio.ByteBuffer; import java.nio.ByteOrder; import java.nio.FloatBuffer; import static android.opengl.GLES20.*; import static javax.microedition.khronos.egl.EGL10.*; /** * Default built-in wallpaper that simply shows a static image. */ @SuppressWarnings({"UnusedDeclaration"}) public class ImageWallpaper extends WallpaperService { private static final String TAG = "ImageWallpaper"; private static final String GL_LOG_TAG = "ImageWallpaperGL"; private static final boolean DEBUG = false; private static final String PROPERTY_KERNEL_QEMU = "ro.kernel.qemu"; static final boolean FIXED_SIZED_SURFACE = true; static final boolean USE_OPENGL = true; WallpaperManager mWallpaperManager; DrawableEngine mEngine; boolean mIsHwAccelerated; @Override public void onCreate() { super.onCreate(); mWallpaperManager = (WallpaperManager) getSystemService(WALLPAPER_SERVICE); //noinspection PointlessBooleanExpression,ConstantConditions if (FIXED_SIZED_SURFACE && USE_OPENGL) { if (!isEmulator()) { mIsHwAccelerated = ActivityManager.isHighEndGfx(); } } } @Override public void onTrimMemory(int level) { if (mEngine != null) { mEngine.trimMemory(level); } } private static boolean isEmulator() { return "1".equals(SystemProperties.get(PROPERTY_KERNEL_QEMU, "0")); } @Override public Engine onCreateEngine() { mEngine = new DrawableEngine(); return mEngine; } class DrawableEngine extends Engine { static final int EGL_CONTEXT_CLIENT_VERSION = 0x3098; static final int EGL_OPENGL_ES2_BIT = 4; // TODO: Not currently used, keeping around until we know we don't need it @SuppressWarnings({"UnusedDeclaration"}) private WallpaperObserver mReceiver; Bitmap mBackground; int mLastSurfaceWidth = -1, mLastSurfaceHeight = -1; int mLastRotation = -1; float mXOffset; float mYOffset; boolean mVisible = true; boolean mRedrawNeeded; boolean mOffsetsChanged; int mLastXTranslation; int mLastYTranslation; private EGL10 mEgl; private EGLDisplay mEglDisplay; private EGLConfig mEglConfig; private EGLContext mEglContext; private EGLSurface mEglSurface; private static final String sSimpleVS = "attribute vec4 position;\n" + "attribute vec2 texCoords;\n" + "varying vec2 outTexCoords;\n" + "uniform mat4 projection;\n" + "\nvoid main(void) {\n" + " outTexCoords = texCoords;\n" + " gl_Position = projection * position;\n" + "}\n\n"; private static final String sSimpleFS = "precision mediump float;\n\n" + "varying vec2 outTexCoords;\n" + "uniform sampler2D texture;\n" + "\nvoid main(void) {\n" + " gl_FragColor = texture2D(texture, outTexCoords);\n" + "}\n\n"; private static final int FLOAT_SIZE_BYTES = 4; private static final int TRIANGLE_VERTICES_DATA_STRIDE_BYTES = 5 * FLOAT_SIZE_BYTES; private static final int TRIANGLE_VERTICES_DATA_POS_OFFSET = 0; private static final int TRIANGLE_VERTICES_DATA_UV_OFFSET = 3; class WallpaperObserver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { if (DEBUG) { Log.d(TAG, "onReceive"); } mLastSurfaceWidth = mLastSurfaceHeight = -1; mBackground = null; mRedrawNeeded = true; drawFrame(); } } public DrawableEngine() { super(); setFixedSizeAllowed(true); } public void trimMemory(int level) { if (level >= ComponentCallbacks2.TRIM_MEMORY_RUNNING_LOW && mBackground != null && mIsHwAccelerated) { if (DEBUG) { Log.d(TAG, "trimMemory"); } mBackground.recycle(); mBackground = null; mWallpaperManager.forgetLoadedWallpaper(); } } @Override public void onCreate(SurfaceHolder surfaceHolder) { if (DEBUG) { Log.d(TAG, "onCreate"); } super.onCreate(surfaceHolder); // TODO: Don't need this currently because the wallpaper service // will restart the image wallpaper whenever the image changes. //IntentFilter filter = new IntentFilter(Intent.ACTION_WALLPAPER_CHANGED); //mReceiver = new WallpaperObserver(); //registerReceiver(mReceiver, filter, null, mHandler); updateSurfaceSize(surfaceHolder); setOffsetNotificationsEnabled(false); } @Override public void onDestroy() { super.onDestroy(); if (mReceiver != null) { unregisterReceiver(mReceiver); } } @Override public void onDesiredSizeChanged(int desiredWidth, int desiredHeight) { super.onDesiredSizeChanged(desiredWidth, desiredHeight); SurfaceHolder surfaceHolder = getSurfaceHolder(); if (surfaceHolder != null) { updateSurfaceSize(surfaceHolder); } } void updateSurfaceSize(SurfaceHolder surfaceHolder) { if (FIXED_SIZED_SURFACE) { // Used a fixed size surface, because we are special. We can do // this because we know the current design of window animations doesn't // cause this to break. surfaceHolder.setFixedSize(getDesiredMinimumWidth(), getDesiredMinimumHeight()); } else { surfaceHolder.setSizeFromLayout(); } } @Override public void onVisibilityChanged(boolean visible) { if (DEBUG) { Log.d(TAG, "onVisibilityChanged: mVisible, visible=" + mVisible + ", " + visible); } if (mVisible != visible) { if (DEBUG) { Log.d(TAG, "Visibility changed to visible=" + visible); } mVisible = visible; drawFrame(); } } @Override public void onTouchEvent(MotionEvent event) { super.onTouchEvent(event); } @Override public void onOffsetsChanged(float xOffset, float yOffset, float xOffsetStep, float yOffsetStep, int xPixels, int yPixels) { if (DEBUG) { Log.d(TAG, "onOffsetsChanged: xOffset=" + xOffset + ", yOffset=" + yOffset + ", xOffsetStep=" + xOffsetStep + ", yOffsetStep=" + yOffsetStep + ", xPixels=" + xPixels + ", yPixels=" + yPixels); } if (mXOffset != xOffset || mYOffset != yOffset) { if (DEBUG) { Log.d(TAG, "Offsets changed to (" + xOffset + "," + yOffset + ")."); } mXOffset = xOffset; mYOffset = yOffset; mOffsetsChanged = true; } drawFrame(); } @Override public void onSurfaceChanged(SurfaceHolder holder, int format, int width, int height) { if (DEBUG) { Log.d(TAG, "onSurfaceChanged: width=" + width + ", height=" + height); } super.onSurfaceChanged(holder, format, width, height); drawFrame(); } @Override public void onSurfaceDestroyed(SurfaceHolder holder) { super.onSurfaceDestroyed(holder); mLastSurfaceWidth = mLastSurfaceHeight = -1; } @Override public void onSurfaceCreated(SurfaceHolder holder) { super.onSurfaceCreated(holder); mLastSurfaceWidth = mLastSurfaceHeight = -1; } @Override public void onSurfaceRedrawNeeded(SurfaceHolder holder) { if (DEBUG) { Log.d(TAG, "onSurfaceRedrawNeeded"); } super.onSurfaceRedrawNeeded(holder); drawFrame(); } void drawFrame() { SurfaceHolder sh = getSurfaceHolder(); final Rect frame = sh.getSurfaceFrame(); final int dw = frame.width(); final int dh = frame.height(); int newRotation = ((WindowManager) getSystemService(WINDOW_SERVICE)). getDefaultDisplay().getRotation(); boolean surfaceDimensionsChanged = dw != mLastSurfaceWidth || dh != mLastSurfaceHeight; boolean redrawNeeded = surfaceDimensionsChanged || newRotation != mLastRotation; if (!redrawNeeded && !mOffsetsChanged) { if (DEBUG) { Log.d(TAG, "Suppressed drawFrame since redraw is not needed " + "and offsets have not changed."); } return; } mLastRotation = newRotation; // Load bitmap if it is not yet loaded or if it was loaded at a different size if (mBackground == null || surfaceDimensionsChanged) { if (DEBUG) { Log.d(TAG, "Reloading bitmap: mBackground, bgw, bgh, dw, dh = " + mBackground + ", " + ((mBackground == null) ? 0 : mBackground.getWidth()) + ", " + ((mBackground == null) ? 0 : mBackground.getHeight()) + ", " + dw + ", " + dh); } updateWallpaperLocked(); if (mBackground == null) { if (DEBUG) { Log.d(TAG, "Unable to load bitmap"); } return; } if (DEBUG) { if (dw != mBackground.getWidth() || dh != mBackground.getHeight()) { Log.d(TAG, "Surface != bitmap dimensions: surface w/h, bitmap w/h: " + dw + ", " + dh + ", " + mBackground.getWidth() + ", " + mBackground.getHeight()); } } } final int availw = dw - mBackground.getWidth(); final int availh = dh - mBackground.getHeight(); int xPixels = availw < 0 ? (int)(availw * mXOffset + .5f) : (availw / 2); int yPixels = availh < 0 ? (int)(availh * mYOffset + .5f) : (availh / 2); mOffsetsChanged = false; mRedrawNeeded = false; if (surfaceDimensionsChanged) { mLastSurfaceWidth = dw; mLastSurfaceHeight = dh; } mLastXTranslation = xPixels; mLastYTranslation = yPixels; if (!redrawNeeded && xPixels == mLastXTranslation && yPixels == mLastYTranslation) { if (DEBUG) { Log.d(TAG, "Suppressed drawFrame since the image has not " + "actually moved an integral number of pixels."); } return; } if (DEBUG) { Log.d(TAG, "Redrawing wallpaper"); } if (mIsHwAccelerated) { if (!drawWallpaperWithOpenGL(sh, availw, availh, xPixels, yPixels)) { drawWallpaperWithCanvas(sh, availw, availh, xPixels, yPixels); } } else { drawWallpaperWithCanvas(sh, availw, availh, xPixels, yPixels); if (FIXED_SIZED_SURFACE) { // If the surface is fixed-size, we should only need to // draw it once and then we'll let the window manager // position it appropriately. As such, we no longer needed // the loaded bitmap. Yay! // hw-accelerated path retains bitmap for faster rotation mBackground = null; mWallpaperManager.forgetLoadedWallpaper(); } } } private void updateWallpaperLocked() { Throwable exception = null; try { mBackground = null; mBackground = mWallpaperManager.getBitmap(); } catch (RuntimeException e) { exception = e; } catch (OutOfMemoryError e) { exception = e; } if (exception != null) { mBackground = null; // Note that if we do fail at this, and the default wallpaper can't // be loaded, we will go into a cycle. Don't do a build where the // default wallpaper can't be loaded. Log.w(TAG, "Unable to load wallpaper!", exception); try { mWallpaperManager.clear(); } catch (IOException ex) { // now we're really screwed. Log.w(TAG, "Unable reset to default wallpaper!", ex); } } } private void drawWallpaperWithCanvas(SurfaceHolder sh, int w, int h, int x, int y) { Canvas c = sh.lockCanvas(); if (c != null) { try { if (DEBUG) { Log.d(TAG, "Redrawing: x=" + x + ", y=" + y); } c.translate(x, y); if (w < 0 || h < 0) { c.save(Canvas.CLIP_SAVE_FLAG); c.clipRect(0, 0, mBackground.getWidth(), mBackground.getHeight(), Op.DIFFERENCE); c.drawColor(0xff000000); c.restore(); } if (mBackground != null) { c.drawBitmap(mBackground, 0, 0, null); } } finally { sh.unlockCanvasAndPost(c); } } } private boolean drawWallpaperWithOpenGL(SurfaceHolder sh, int w, int h, int left, int top) { if (!initGL(sh)) return false; final float right = left + mBackground.getWidth(); final float bottom = top + mBackground.getHeight(); final Rect frame = sh.getSurfaceFrame(); final Matrix4f ortho = new Matrix4f(); ortho.loadOrtho(0.0f, frame.width(), frame.height(), 0.0f, -1.0f, 1.0f); final FloatBuffer triangleVertices = createMesh(left, top, right, bottom); final int texture = loadTexture(mBackground); final int program = buildProgram(sSimpleVS, sSimpleFS); final int attribPosition = glGetAttribLocation(program, "position"); final int attribTexCoords = glGetAttribLocation(program, "texCoords"); final int uniformTexture = glGetUniformLocation(program, "texture"); final int uniformProjection = glGetUniformLocation(program, "projection"); checkGlError(); glViewport(0, 0, frame.width(), frame.height()); glBindTexture(GL_TEXTURE_2D, texture); glUseProgram(program); glEnableVertexAttribArray(attribPosition); glEnableVertexAttribArray(attribTexCoords); glUniform1i(uniformTexture, 0); glUniformMatrix4fv(uniformProjection, 1, false, ortho.getArray(), 0); checkGlError(); if (w < 0 || h < 0) { glClearColor(0.0f, 0.0f, 0.0f, 0.0f); glClear(GL_COLOR_BUFFER_BIT); } // drawQuad triangleVertices.position(TRIANGLE_VERTICES_DATA_POS_OFFSET); glVertexAttribPointer(attribPosition, 3, GL_FLOAT, false, TRIANGLE_VERTICES_DATA_STRIDE_BYTES, triangleVertices); triangleVertices.position(TRIANGLE_VERTICES_DATA_UV_OFFSET); glVertexAttribPointer(attribTexCoords, 3, GL_FLOAT, false, TRIANGLE_VERTICES_DATA_STRIDE_BYTES, triangleVertices); glDrawArrays(GL_TRIANGLE_STRIP, 0, 4); boolean status = mEgl.eglSwapBuffers(mEglDisplay, mEglSurface); checkEglError(); finishGL(); return status; } private FloatBuffer createMesh(int left, int top, float right, float bottom) { final float[] verticesData = { // X, Y, Z, U, V left, bottom, 0.0f, 0.0f, 1.0f, right, bottom, 0.0f, 1.0f, 1.0f, left, top, 0.0f, 0.0f, 0.0f, right, top, 0.0f, 1.0f, 0.0f, }; final int bytes = verticesData.length * FLOAT_SIZE_BYTES; final FloatBuffer triangleVertices = ByteBuffer.allocateDirect(bytes).order( ByteOrder.nativeOrder()).asFloatBuffer(); triangleVertices.put(verticesData).position(0); return triangleVertices; } private int loadTexture(Bitmap bitmap) { int[] textures = new int[1]; glActiveTexture(GL_TEXTURE0); glGenTextures(1, textures, 0); checkGlError(); int texture = textures[0]; glBindTexture(GL_TEXTURE_2D, texture); checkGlError(); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); GLUtils.texImage2D(GL_TEXTURE_2D, 0, GL_RGBA, bitmap, GL_UNSIGNED_BYTE, 0); checkGlError(); return texture; } private int buildProgram(String vertex, String fragment) { int vertexShader = buildShader(vertex, GL_VERTEX_SHADER); if (vertexShader == 0) return 0; int fragmentShader = buildShader(fragment, GL_FRAGMENT_SHADER); if (fragmentShader == 0) return 0; int program = glCreateProgram(); glAttachShader(program, vertexShader); checkGlError(); glAttachShader(program, fragmentShader); checkGlError(); glLinkProgram(program); checkGlError(); int[] status = new int[1]; glGetProgramiv(program, GL_LINK_STATUS, status, 0); if (status[0] != GL_TRUE) { String error = glGetProgramInfoLog(program); Log.d(GL_LOG_TAG, "Error while linking program:\n" + error); glDeleteShader(vertexShader); glDeleteShader(fragmentShader); glDeleteProgram(program); return 0; } return program; } private int buildShader(String source, int type) { int shader = glCreateShader(type); glShaderSource(shader, source); checkGlError(); glCompileShader(shader); checkGlError(); int[] status = new int[1]; glGetShaderiv(shader, GL_COMPILE_STATUS, status, 0); if (status[0] != GL_TRUE) { String error = glGetShaderInfoLog(shader); Log.d(GL_LOG_TAG, "Error while compiling shader:\n" + error); glDeleteShader(shader); return 0; } return shader; } private void checkEglError() { int error = mEgl.eglGetError(); if (error != EGL_SUCCESS) { Log.w(GL_LOG_TAG, "EGL error = " + GLUtils.getEGLErrorString(error)); } } private void checkGlError() { int error = glGetError(); if (error != GL_NO_ERROR) { Log.w(GL_LOG_TAG, "GL error = 0x" + Integer.toHexString(error), new Throwable()); } } private void finishGL() { mEgl.eglMakeCurrent(mEglDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT); mEgl.eglDestroySurface(mEglDisplay, mEglSurface); mEgl.eglDestroyContext(mEglDisplay, mEglContext); mEgl.eglTerminate(mEglDisplay); } private boolean initGL(SurfaceHolder surfaceHolder) { mEgl = (EGL10) EGLContext.getEGL(); mEglDisplay = mEgl.eglGetDisplay(EGL_DEFAULT_DISPLAY); if (mEglDisplay == EGL_NO_DISPLAY) { throw new RuntimeException("eglGetDisplay failed " + GLUtils.getEGLErrorString(mEgl.eglGetError())); } int[] version = new int[2]; if (!mEgl.eglInitialize(mEglDisplay, version)) { throw new RuntimeException("eglInitialize failed " + GLUtils.getEGLErrorString(mEgl.eglGetError())); } mEglConfig = chooseEglConfig(); if (mEglConfig == null) { throw new RuntimeException("eglConfig not initialized"); } mEglContext = createContext(mEgl, mEglDisplay, mEglConfig); if (mEglContext == EGL_NO_CONTEXT) { throw new RuntimeException("createContext failed " + GLUtils.getEGLErrorString(mEgl.eglGetError())); } int attribs[] = { EGL_WIDTH, 1, EGL_HEIGHT, 1, EGL_NONE }; EGLSurface tmpSurface = mEgl.eglCreatePbufferSurface(mEglDisplay, mEglConfig, attribs); mEgl.eglMakeCurrent(mEglDisplay, tmpSurface, tmpSurface, mEglContext); int[] maxSize = new int[1]; Rect frame = surfaceHolder.getSurfaceFrame(); glGetIntegerv(GL_MAX_TEXTURE_SIZE, maxSize, 0); mEgl.eglMakeCurrent(mEglDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT); mEgl.eglDestroySurface(mEglDisplay, tmpSurface); if(frame.width() > maxSize[0] || frame.height() > maxSize[0]) { mEgl.eglDestroyContext(mEglDisplay, mEglContext); mEgl.eglTerminate(mEglDisplay); Log.e(GL_LOG_TAG, "requested texture size " + frame.width() + "x" + frame.height() + " exceeds the support maximum of " + maxSize[0] + "x" + maxSize[0]); return false; } mEglSurface = mEgl.eglCreateWindowSurface(mEglDisplay, mEglConfig, surfaceHolder, null); if (mEglSurface == null || mEglSurface == EGL_NO_SURFACE) { int error = mEgl.eglGetError(); if (error == EGL_BAD_NATIVE_WINDOW || error == EGL_BAD_ALLOC) { Log.e(GL_LOG_TAG, "createWindowSurface returned " + GLUtils.getEGLErrorString(error) + "."); return false; } throw new RuntimeException("createWindowSurface failed " + GLUtils.getEGLErrorString(error)); } if (!mEgl.eglMakeCurrent(mEglDisplay, mEglSurface, mEglSurface, mEglContext)) { throw new RuntimeException("eglMakeCurrent failed " + GLUtils.getEGLErrorString(mEgl.eglGetError())); } return true; } EGLContext createContext(EGL10 egl, EGLDisplay eglDisplay, EGLConfig eglConfig) { int[] attrib_list = { EGL_CONTEXT_CLIENT_VERSION, 2, EGL_NONE }; return egl.eglCreateContext(eglDisplay, eglConfig, EGL_NO_CONTEXT, attrib_list); } private EGLConfig chooseEglConfig() { int[] configsCount = new int[1]; EGLConfig[] configs = new EGLConfig[1]; int[] configSpec = getConfig(); if (!mEgl.eglChooseConfig(mEglDisplay, configSpec, configs, 1, configsCount)) { throw new IllegalArgumentException("eglChooseConfig failed " + GLUtils.getEGLErrorString(mEgl.eglGetError())); } else if (configsCount[0] > 0) { return configs[0]; } return null; } private int[] getConfig() { return new int[] { EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT, EGL_RED_SIZE, 8, EGL_GREEN_SIZE, 8, EGL_BLUE_SIZE, 8, EGL_ALPHA_SIZE, 0, EGL_DEPTH_SIZE, 0, EGL_STENCIL_SIZE, 0, EGL_CONFIG_CAVEAT, EGL_NONE, EGL_NONE }; } } }