--- /dev/null
+/*
+ * Copyright (C) 2019 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.server.wallpaper;
+
+import static android.opengl.EGL14.EGL_ALPHA_SIZE;
+import static android.opengl.EGL14.EGL_BLUE_SIZE;
+import static android.opengl.EGL14.EGL_CONFIG_CAVEAT;
+import static android.opengl.EGL14.EGL_CONTEXT_CLIENT_VERSION;
+import static android.opengl.EGL14.EGL_DEFAULT_DISPLAY;
+import static android.opengl.EGL14.EGL_DEPTH_SIZE;
+import static android.opengl.EGL14.EGL_GREEN_SIZE;
+import static android.opengl.EGL14.EGL_HEIGHT;
+import static android.opengl.EGL14.EGL_NONE;
+import static android.opengl.EGL14.EGL_NO_CONTEXT;
+import static android.opengl.EGL14.EGL_NO_DISPLAY;
+import static android.opengl.EGL14.EGL_NO_SURFACE;
+import static android.opengl.EGL14.EGL_OPENGL_ES2_BIT;
+import static android.opengl.EGL14.EGL_RED_SIZE;
+import static android.opengl.EGL14.EGL_RENDERABLE_TYPE;
+import static android.opengl.EGL14.EGL_STENCIL_SIZE;
+import static android.opengl.EGL14.EGL_WIDTH;
+import static android.opengl.EGL14.eglChooseConfig;
+import static android.opengl.EGL14.eglCreateContext;
+import static android.opengl.EGL14.eglCreatePbufferSurface;
+import static android.opengl.EGL14.eglDestroyContext;
+import static android.opengl.EGL14.eglDestroySurface;
+import static android.opengl.EGL14.eglGetDisplay;
+import static android.opengl.EGL14.eglGetError;
+import static android.opengl.EGL14.eglInitialize;
+import static android.opengl.EGL14.eglMakeCurrent;
+import static android.opengl.EGL14.eglTerminate;
+import static android.opengl.GLES20.GL_MAX_TEXTURE_SIZE;
+import static android.opengl.GLES20.glGetIntegerv;
+
+import android.opengl.EGLConfig;
+import android.opengl.EGLContext;
+import android.opengl.EGLDisplay;
+import android.opengl.EGLSurface;
+import android.opengl.GLUtils;
+import android.os.SystemProperties;
+import android.util.Log;
+
+class GLHelper {
+ private static final String TAG = GLHelper.class.getSimpleName();
+ private static final int sMaxTextureSize;
+
+ static {
+ int maxTextureSize = SystemProperties.getInt("sys.max_texture_size", 0);
+ sMaxTextureSize = maxTextureSize > 0 ? maxTextureSize : retrieveTextureSizeFromGL();
+ }
+
+ private static int retrieveTextureSizeFromGL() {
+ try {
+ String err;
+
+ // Before we can retrieve info from GL,
+ // we have to create EGLContext, EGLConfig and EGLDisplay first.
+ // We will fail at querying info from GL once one of above failed.
+ // When this happens, we will use defValue instead.
+ EGLDisplay eglDisplay = eglGetDisplay(EGL_DEFAULT_DISPLAY);
+ if (eglDisplay == null || eglDisplay == EGL_NO_DISPLAY) {
+ err = "eglGetDisplay failed: " + GLUtils.getEGLErrorString(eglGetError());
+ throw new RuntimeException(err);
+ }
+
+ if (!eglInitialize(eglDisplay, null, 0 /* majorOffset */, null, 1 /* minorOffset */)) {
+ err = "eglInitialize failed: " + GLUtils.getEGLErrorString(eglGetError());
+ throw new RuntimeException(err);
+ }
+
+ EGLConfig eglConfig = null;
+ int[] configsCount = new int[1];
+ EGLConfig[] configs = new EGLConfig[1];
+ int[] configSpec = 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
+ };
+
+ if (!eglChooseConfig(eglDisplay, configSpec, 0 /* attrib_listOffset */,
+ configs, 0 /* configOffset */, 1 /* config_size */,
+ configsCount, 0 /* num_configOffset */)) {
+ err = "eglChooseConfig failed: " + GLUtils.getEGLErrorString(eglGetError());
+ throw new RuntimeException(err);
+ } else if (configsCount[0] > 0) {
+ eglConfig = configs[0];
+ }
+
+ if (eglConfig == null) {
+ throw new RuntimeException("eglConfig not initialized!");
+ }
+
+ int[] attr_list = new int[] {EGL_CONTEXT_CLIENT_VERSION, 2, EGL_NONE};
+ EGLContext eglContext = eglCreateContext(
+ eglDisplay, eglConfig, EGL_NO_CONTEXT, attr_list, 0 /* offset */);
+
+ if (eglContext == null || eglContext == EGL_NO_CONTEXT) {
+ err = "eglCreateContext failed: " + GLUtils.getEGLErrorString(eglGetError());
+ throw new RuntimeException(err);
+ }
+
+ // We create a push buffer temporarily for querying info from GL.
+ int[] attrs = {EGL_WIDTH, 1, EGL_HEIGHT, 1, EGL_NONE};
+ EGLSurface eglSurface =
+ eglCreatePbufferSurface(eglDisplay, eglConfig, attrs, 0 /* offset */);
+ eglMakeCurrent(eglDisplay, eglSurface, eglSurface, eglContext);
+
+ // Now, we are ready to query the info from GL.
+ int[] maxSize = new int[1];
+ glGetIntegerv(GL_MAX_TEXTURE_SIZE, maxSize, 0 /* offset */);
+
+ // We have got the info we want, release all egl resources.
+ eglMakeCurrent(eglDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
+ eglDestroySurface(eglDisplay, eglSurface);
+ eglDestroyContext(eglDisplay, eglContext);
+ eglTerminate(eglDisplay);
+ return maxSize[0];
+ } catch (RuntimeException e) {
+ Log.w(TAG, "Retrieve from GL failed", e);
+ return Integer.MAX_VALUE;
+ }
+ }
+
+ static int getMaxTextureSize() {
+ return sMaxTextureSize;
+ }
+}
+
static final boolean DEBUG = false;
static final boolean DEBUG_LIVE = DEBUG || true;
+ // This 100MB limitation is defined in DisplayListCanvas.
+ private static final int MAX_BITMAP_SIZE = 100 * 1024 * 1024;
+
public static class Lifecycle extends SystemService {
private WallpaperManagerService mService;
}
// scale if the crop height winds up not matching the recommended metrics
- needScale = (wallpaper.height != cropHint.height());
+ // also take care of invalid dimensions.
+ needScale = wallpaper.height != cropHint.height()
+ || cropHint.height() > GLHelper.getMaxTextureSize()
+ || cropHint.width() > GLHelper.getMaxTextureSize();
if (DEBUG) {
Slog.v(TAG, "crop: w=" + cropHint.width() + " h=" + cropHint.height());
if (!needCrop && !needScale) {
// Simple case: the nominal crop fits what we want, so we take
// the whole thing and just copy the image file directly.
- if (DEBUG) {
- Slog.v(TAG, "Null crop of new wallpaper; copying");
+
+ // TODO: It is not accurate to estimate bitmap size without decoding it,
+ // may be we can try to remove this optimized way in the future,
+ // that means, we will always go into the 'else' block.
+
+ // This is just a quick estimation, may be smaller than it is.
+ long estimateSize = options.outWidth * options.outHeight * 4;
+
+ // A bitmap over than MAX_BITMAP_SIZE will make drawBitmap() fail.
+ // Please see: DisplayListCanvas#throwIfCannotDraw.
+ if (estimateSize < MAX_BITMAP_SIZE) {
+ success = FileUtils.copyFile(wallpaper.wallpaperFile, wallpaper.cropFile);
}
- success = FileUtils.copyFile(wallpaper.wallpaperFile, wallpaper.cropFile);
+
if (!success) {
wallpaper.cropFile.delete();
// TODO: fall back to default wallpaper in this case
}
+
+ if (DEBUG) {
+ Slog.v(TAG, "Null crop of new wallpaper, estimate size=" + estimateSize
+ + ", success=" + success);
+ }
} else {
// Fancy case: crop and scale. First, we decode and scale down if appropriate.
FileOutputStream f = null;
// We calculate the largest power-of-two under the actual ratio rather than
// just let the decode take care of it because we also want to remap where the
// cropHint rectangle lies in the decoded [super]rect.
- final BitmapFactory.Options scaler;
final int actualScale = cropHint.height() / wallpaper.height;
int scale = 1;
- while (2*scale < actualScale) {
+ while (2*scale <= actualScale) {
scale *= 2;
}
- if (scale > 1) {
- scaler = new BitmapFactory.Options();
- scaler.inSampleSize = scale;
+ options.inSampleSize = scale;
+ options.inJustDecodeBounds = false;
+
+ final Rect estimateCrop = new Rect(cropHint);
+ estimateCrop.scale(1f / options.inSampleSize);
+ final float hRatio = (float) wallpaper.height / estimateCrop.height();
+ final int destHeight = (int) (estimateCrop.height() * hRatio);
+ final int destWidth = (int) (estimateCrop.width() * hRatio);
+
+ // We estimated an invalid crop, try to adjust the cropHint to get a valid one.
+ if (destWidth > GLHelper.getMaxTextureSize()) {
+ int newHeight = (int) (wallpaper.height / hRatio);
+ int newWidth = (int) (wallpaper.width / hRatio);
+
if (DEBUG) {
- Slog.v(TAG, "Downsampling cropped rect with scale " + scale);
+ Slog.v(TAG, "Invalid crop dimensions, trying to adjust.");
}
- } else {
- scaler = null;
+
+ estimateCrop.set(cropHint);
+ estimateCrop.left += (cropHint.width() - newWidth) / 2;
+ estimateCrop.top += (cropHint.height() - newHeight) / 2;
+ estimateCrop.right = estimateCrop.left + newWidth;
+ estimateCrop.bottom = estimateCrop.top + newHeight;
+ cropHint.set(estimateCrop);
+ estimateCrop.scale(1f / options.inSampleSize);
+ }
+
+ // We've got the safe cropHint; now we want to scale it properly to
+ // the desired rectangle.
+ // That's a height-biased operation: make it fit the hinted height.
+ final int safeHeight = (int) (estimateCrop.height() * hRatio);
+ final int safeWidth = (int) (estimateCrop.width() * hRatio);
+
+ if (DEBUG) {
+ Slog.v(TAG, "Decode parameters:");
+ Slog.v(TAG, " cropHint=" + cropHint + ", estimateCrop=" + estimateCrop);
+ Slog.v(TAG, " down sampling=" + options.inSampleSize
+ + ", hRatio=" + hRatio);
+ Slog.v(TAG, " dest=" + destWidth + "x" + destHeight);
+ Slog.v(TAG, " safe=" + safeWidth + "x" + safeHeight);
+ Slog.v(TAG, " maxTextureSize=" + GLHelper.getMaxTextureSize());
}
- Bitmap cropped = decoder.decodeRegion(cropHint, scaler);
+
+ Bitmap cropped = decoder.decodeRegion(cropHint, options);
decoder.recycle();
if (cropped == null) {
Slog.e(TAG, "Could not decode new wallpaper");
} else {
- // We've got the extracted crop; now we want to scale it properly to
- // the desired rectangle. That's a height-biased operation: make it
- // fit the hinted height, and accept whatever width we end up with.
- cropHint.offsetTo(0, 0);
- cropHint.right /= scale; // adjust by downsampling factor
- cropHint.bottom /= scale;
- final float heightR = ((float)wallpaper.height) / ((float)cropHint.height());
- if (DEBUG) {
- Slog.v(TAG, "scale " + heightR + ", extracting " + cropHint);
- }
- final int destWidth = (int)(cropHint.width() * heightR);
+ // We are safe to create final crop with safe dimensions now.
final Bitmap finalCrop = Bitmap.createScaledBitmap(cropped,
- destWidth, wallpaper.height, true);
+ safeWidth, safeHeight, true);
if (DEBUG) {
Slog.v(TAG, "Final extract:");
Slog.v(TAG, " dims: w=" + wallpaper.width
+ " h=" + wallpaper.height);
- Slog.v(TAG, " out: w=" + finalCrop.getWidth()
+ Slog.v(TAG, " out: w=" + finalCrop.getWidth()
+ " h=" + finalCrop.getHeight());
}
+ // A bitmap over than MAX_BITMAP_SIZE will make drawBitmap() fail.
+ // Please see: DisplayListCanvas#throwIfCannotDraw.
+ if (finalCrop.getByteCount() > MAX_BITMAP_SIZE) {
+ throw new RuntimeException(
+ "Too large bitmap, limit=" + MAX_BITMAP_SIZE);
+ }
+
f = new FileOutputStream(wallpaper.cropFile);
bos = new BufferedOutputStream(f, 32*1024);
finalCrop.compress(Bitmap.CompressFormat.JPEG, 100, bos);
if (!isWallpaperSupported(callingPackage)) {
return;
}
+
+ // Make sure both width and height are not larger than max texture size.
+ width = Math.min(width, GLHelper.getMaxTextureSize());
+ height = Math.min(height, GLHelper.getMaxTextureSize());
+
synchronized (mLock) {
int userId = UserHandle.getCallingUserId();
WallpaperData wallpaper = getWallpaperSafeLocked(userId, FLAG_SYSTEM);
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