diff options
Diffstat (limited to 'photoviewer/src/com/android/ex/photo/util/ImageUtils.java')
| -rw-r--r-- | photoviewer/src/com/android/ex/photo/util/ImageUtils.java | 251 |
1 files changed, 0 insertions, 251 deletions
diff --git a/photoviewer/src/com/android/ex/photo/util/ImageUtils.java b/photoviewer/src/com/android/ex/photo/util/ImageUtils.java deleted file mode 100644 index f37a1ad..0000000 --- a/photoviewer/src/com/android/ex/photo/util/ImageUtils.java +++ /dev/null @@ -1,251 +0,0 @@ -/* - * Copyright (C) 2011 Google Inc. - * Licensed to 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.ex.photo.util; - -import android.content.ContentResolver; -import android.graphics.Bitmap; -import android.graphics.BitmapFactory; -import android.graphics.Matrix; -import android.graphics.Point; -import android.graphics.Rect; -import android.net.Uri; -import android.os.Build; -import android.util.DisplayMetrics; -import android.util.Log; - -import com.android.ex.photo.PhotoViewActivity; -import com.android.ex.photo.util.Exif; - -import java.io.ByteArrayInputStream; -import java.io.ByteArrayOutputStream; -import java.io.FileNotFoundException; -import java.io.IOException; -import java.io.InputStream; -import java.net.MalformedURLException; -import java.net.URL; - - -/** - * Image utilities - */ -public class ImageUtils { - // Logging - private static final String TAG = "ImageUtils"; - - /** Minimum class memory class to use full-res photos */ - private final static long MIN_NORMAL_CLASS = 32; - /** Minimum class memory class to use small photos */ - private final static long MIN_SMALL_CLASS = 24; - - public static enum ImageSize { - EXTRA_SMALL, - SMALL, - NORMAL, - } - - public static final ImageSize sUseImageSize; - static { - // On HC and beyond, assume devices are more capable - if (Build.VERSION.SDK_INT >= 11) { - sUseImageSize = ImageSize.NORMAL; - } else { - if (PhotoViewActivity.sMemoryClass >= MIN_NORMAL_CLASS) { - // We have plenty of memory; use full sized photos - sUseImageSize = ImageSize.NORMAL; - } else if (PhotoViewActivity.sMemoryClass >= MIN_SMALL_CLASS) { - // We have slight less memory; use smaller sized photos - sUseImageSize = ImageSize.SMALL; - } else { - // We have little memory; use very small sized photos - sUseImageSize = ImageSize.EXTRA_SMALL; - } - } - } - - /** - * @return true if the MimeType type is image - */ - public static boolean isImageMimeType(String mimeType) { - return mimeType != null && mimeType.startsWith("image/"); - } - - /** - * Create a bitmap from a local URI - * - * @param resolver The ContentResolver - * @param uri The local URI - * @param maxSize The maximum size (either width or height) - * - * @return The new bitmap or null - */ - public static Bitmap createLocalBitmap(ContentResolver resolver, Uri uri, int maxSize) { - // TODO: make this method not download the image for both getImageBounds and decodeStream - InputStream inputStream = null; - try { - final BitmapFactory.Options opts = new BitmapFactory.Options(); - final Point bounds = getImageBounds(resolver, uri); - inputStream = openInputStream(resolver, uri); - if (bounds == null || inputStream == null) { - return null; - } - opts.inSampleSize = Math.max(bounds.x / maxSize, bounds.y / maxSize); - - final Bitmap decodedBitmap = decodeStream(inputStream, null, opts); - - // Correct thumbnail orientation as necessary - // TODO: Fix rotation if it's actually a problem - //return rotateBitmap(resolver, uri, decodedBitmap); - return decodedBitmap; - - } catch (FileNotFoundException exception) { - // Do nothing - the photo will appear to be missing - } catch (IOException exception) { - // Do nothing - the photo will appear to be missing - } catch (IllegalArgumentException exception) { - // Do nothing - the photo will appear to be missing - } finally { - try { - if (inputStream != null) { - inputStream.close(); - } - } catch (IOException ignore) { - } - } - return null; - } - - /** - * Wrapper around {@link BitmapFactory#decodeStream(InputStream, Rect, - * BitmapFactory.Options)} that returns {@code null} on {@link - * OutOfMemoryError}. - * - * @param is The input stream that holds the raw data to be decoded into a - * bitmap. - * @param outPadding If not null, return the padding rect for the bitmap if - * it exists, otherwise set padding to [-1,-1,-1,-1]. If - * no bitmap is returned (null) then padding is - * unchanged. - * @param opts null-ok; Options that control downsampling and whether the - * image should be completely decoded, or just is size returned. - * @return The decoded bitmap, or null if the image data could not be - * decoded, or, if opts is non-null, if opts requested only the - * size be returned (in opts.outWidth and opts.outHeight) - */ - public static Bitmap decodeStream(InputStream is, Rect outPadding, BitmapFactory.Options opts) { - ByteArrayOutputStream out = null; - InputStream byteStream = null; - try { - out = new ByteArrayOutputStream(); - final byte[] buffer = new byte[4096]; - int n = is.read(buffer); - while (n >= 0) { - out.write(buffer, 0, n); - n = is.read(buffer); - } - - final byte[] bitmapBytes = out.toByteArray(); - - // Determine the orientation for this image - final int orientation = Exif.getOrientation(bitmapBytes); - - // Create an InputStream from this byte array - byteStream = new ByteArrayInputStream(bitmapBytes); - - final Bitmap originalBitmap = BitmapFactory.decodeStream(byteStream, outPadding, opts); - - if (originalBitmap != null && orientation != 0) { - final Matrix matrix = new Matrix(); - matrix.postRotate(orientation); - return Bitmap.createBitmap(originalBitmap, 0, 0, originalBitmap.getWidth(), - originalBitmap.getHeight(), matrix, true); - } - return originalBitmap; - } catch (OutOfMemoryError oome) { - Log.e(TAG, "ImageUtils#decodeStream(InputStream, Rect, Options) threw an OOME", oome); - return null; - } catch (IOException ioe) { - Log.e(TAG, "ImageUtils#decodeStream(InputStream, Rect, Options) threw an IOE", ioe); - return null; - } finally { - if (out != null) { - try { - out.close(); - } catch (IOException e) { - // Do nothing - } - } - if (byteStream != null) { - try { - byteStream.close(); - } catch (IOException e) { - // Do nothing - } - } - } - } - - /** - * Gets the image bounds - * - * @param resolver The ContentResolver - * @param uri The uri - * - * @return The image bounds - */ - private static Point getImageBounds(ContentResolver resolver, Uri uri) - throws IOException { - final BitmapFactory.Options opts = new BitmapFactory.Options(); - InputStream inputStream = null; - String scheme = uri.getScheme(); - try { - opts.inJustDecodeBounds = true; - inputStream = openInputStream(resolver, uri); - if (inputStream == null) { - return null; - } - decodeStream(inputStream, null, opts); - - return new Point(opts.outWidth, opts.outHeight); - } finally { - try { - if (inputStream != null) { - inputStream.close(); - } - } catch (IOException ignore) { - } - } - } - - private static InputStream openInputStream(ContentResolver resolver, Uri uri) throws - FileNotFoundException { - String scheme = uri.getScheme(); - if("http".equals(scheme) || "https".equals(scheme)) { - try { - return new URL(uri.toString()).openStream(); - } catch (MalformedURLException e) { - // Fall-back to the previous behaviour, just in case - Log.w(TAG, "Could not convert the uri to url: " + uri.toString()); - return resolver.openInputStream(uri); - } catch (IOException e) { - Log.w(TAG, "Could not open input stream for uri: " + uri.toString()); - return null; - } - } - return resolver.openInputStream(uri); - } -} |