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author | Angus Kong <shkong@google.com> | 2013-08-09 14:55:20 -0700 |
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committer | Angus Kong <shkong@google.com> | 2013-08-09 17:12:11 -0700 |
commit | b50b5cbfbc0a67db6fc43373363b10381c9c61a3 (patch) | |
tree | b66054bcd1fbbae3ccf4f79d82c29ea1fb643ebf /gallerycommon/src/com/android/gallery3d/common/BitmapUtils.java | |
parent | 4b2cb93c3f652734c41b4eb7449215178c586e8a (diff) | |
download | android_packages_apps_Snap-b50b5cbfbc0a67db6fc43373363b10381c9c61a3.tar.gz android_packages_apps_Snap-b50b5cbfbc0a67db6fc43373363b10381c9c61a3.tar.bz2 android_packages_apps_Snap-b50b5cbfbc0a67db6fc43373363b10381c9c61a3.zip |
Clean up Gallery codes.
bug:10263696
Change-Id: I3a16dba3aabe52b8103a2c591cfa39907265a263
Diffstat (limited to 'gallerycommon/src/com/android/gallery3d/common/BitmapUtils.java')
-rw-r--r-- | gallerycommon/src/com/android/gallery3d/common/BitmapUtils.java | 260 |
1 files changed, 0 insertions, 260 deletions
diff --git a/gallerycommon/src/com/android/gallery3d/common/BitmapUtils.java b/gallerycommon/src/com/android/gallery3d/common/BitmapUtils.java deleted file mode 100644 index a671ed2b9..000000000 --- a/gallerycommon/src/com/android/gallery3d/common/BitmapUtils.java +++ /dev/null @@ -1,260 +0,0 @@ -/* - * Copyright (C) 2010 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.gallery3d.common; - -import android.graphics.Bitmap; -import android.graphics.Bitmap.CompressFormat; -import android.graphics.BitmapFactory; -import android.graphics.Canvas; -import android.graphics.Matrix; -import android.graphics.Paint; -import android.os.Build; -import android.util.FloatMath; -import android.util.Log; - -import java.io.ByteArrayOutputStream; -import java.lang.reflect.InvocationTargetException; -import java.lang.reflect.Method; - -public class BitmapUtils { - private static final String TAG = "BitmapUtils"; - private static final int DEFAULT_JPEG_QUALITY = 90; - public static final int UNCONSTRAINED = -1; - - private BitmapUtils(){} - - /* - * Compute the sample size as a function of minSideLength - * and maxNumOfPixels. - * minSideLength is used to specify that minimal width or height of a - * bitmap. - * maxNumOfPixels is used to specify the maximal size in pixels that is - * tolerable in terms of memory usage. - * - * The function returns a sample size based on the constraints. - * Both size and minSideLength can be passed in as UNCONSTRAINED, - * which indicates no care of the corresponding constraint. - * The functions prefers returning a sample size that - * generates a smaller bitmap, unless minSideLength = UNCONSTRAINED. - * - * Also, the function rounds up the sample size to a power of 2 or multiple - * of 8 because BitmapFactory only honors sample size this way. - * For example, BitmapFactory downsamples an image by 2 even though the - * request is 3. So we round up the sample size to avoid OOM. - */ - public static int computeSampleSize(int width, int height, - int minSideLength, int maxNumOfPixels) { - int initialSize = computeInitialSampleSize( - width, height, minSideLength, maxNumOfPixels); - - return initialSize <= 8 - ? Utils.nextPowerOf2(initialSize) - : (initialSize + 7) / 8 * 8; - } - - private static int computeInitialSampleSize(int w, int h, - int minSideLength, int maxNumOfPixels) { - if (maxNumOfPixels == UNCONSTRAINED - && minSideLength == UNCONSTRAINED) return 1; - - int lowerBound = (maxNumOfPixels == UNCONSTRAINED) ? 1 : - (int) FloatMath.ceil(FloatMath.sqrt((float) (w * h) / maxNumOfPixels)); - - if (minSideLength == UNCONSTRAINED) { - return lowerBound; - } else { - int sampleSize = Math.min(w / minSideLength, h / minSideLength); - return Math.max(sampleSize, lowerBound); - } - } - - // This computes a sample size which makes the longer side at least - // minSideLength long. If that's not possible, return 1. - public static int computeSampleSizeLarger(int w, int h, - int minSideLength) { - int initialSize = Math.max(w / minSideLength, h / minSideLength); - if (initialSize <= 1) return 1; - - return initialSize <= 8 - ? Utils.prevPowerOf2(initialSize) - : initialSize / 8 * 8; - } - - // Find the min x that 1 / x >= scale - public static int computeSampleSizeLarger(float scale) { - int initialSize = (int) FloatMath.floor(1f / scale); - if (initialSize <= 1) return 1; - - return initialSize <= 8 - ? Utils.prevPowerOf2(initialSize) - : initialSize / 8 * 8; - } - - // Find the max x that 1 / x <= scale. - public static int computeSampleSize(float scale) { - Utils.assertTrue(scale > 0); - int initialSize = Math.max(1, (int) FloatMath.ceil(1 / scale)); - return initialSize <= 8 - ? Utils.nextPowerOf2(initialSize) - : (initialSize + 7) / 8 * 8; - } - - public static Bitmap resizeBitmapByScale( - Bitmap bitmap, float scale, boolean recycle) { - int width = Math.round(bitmap.getWidth() * scale); - int height = Math.round(bitmap.getHeight() * scale); - if (width == bitmap.getWidth() - && height == bitmap.getHeight()) return bitmap; - Bitmap target = Bitmap.createBitmap(width, height, getConfig(bitmap)); - Canvas canvas = new Canvas(target); - canvas.scale(scale, scale); - Paint paint = new Paint(Paint.FILTER_BITMAP_FLAG | Paint.DITHER_FLAG); - canvas.drawBitmap(bitmap, 0, 0, paint); - if (recycle) bitmap.recycle(); - return target; - } - - private static Bitmap.Config getConfig(Bitmap bitmap) { - Bitmap.Config config = bitmap.getConfig(); - if (config == null) { - config = Bitmap.Config.ARGB_8888; - } - return config; - } - - public static Bitmap resizeDownBySideLength( - Bitmap bitmap, int maxLength, boolean recycle) { - int srcWidth = bitmap.getWidth(); - int srcHeight = bitmap.getHeight(); - float scale = Math.min( - (float) maxLength / srcWidth, (float) maxLength / srcHeight); - if (scale >= 1.0f) return bitmap; - return resizeBitmapByScale(bitmap, scale, recycle); - } - - public static Bitmap resizeAndCropCenter(Bitmap bitmap, int size, boolean recycle) { - int w = bitmap.getWidth(); - int h = bitmap.getHeight(); - if (w == size && h == size) return bitmap; - - // scale the image so that the shorter side equals to the target; - // the longer side will be center-cropped. - float scale = (float) size / Math.min(w, h); - - Bitmap target = Bitmap.createBitmap(size, size, getConfig(bitmap)); - int width = Math.round(scale * bitmap.getWidth()); - int height = Math.round(scale * bitmap.getHeight()); - Canvas canvas = new Canvas(target); - canvas.translate((size - width) / 2f, (size - height) / 2f); - canvas.scale(scale, scale); - Paint paint = new Paint(Paint.FILTER_BITMAP_FLAG | Paint.DITHER_FLAG); - canvas.drawBitmap(bitmap, 0, 0, paint); - if (recycle) bitmap.recycle(); - return target; - } - - public static void recycleSilently(Bitmap bitmap) { - if (bitmap == null) return; - try { - bitmap.recycle(); - } catch (Throwable t) { - Log.w(TAG, "unable recycle bitmap", t); - } - } - - public static Bitmap rotateBitmap(Bitmap source, int rotation, boolean recycle) { - if (rotation == 0) return source; - int w = source.getWidth(); - int h = source.getHeight(); - Matrix m = new Matrix(); - m.postRotate(rotation); - Bitmap bitmap = Bitmap.createBitmap(source, 0, 0, w, h, m, true); - if (recycle) source.recycle(); - return bitmap; - } - - public static Bitmap createVideoThumbnail(String filePath) { - // MediaMetadataRetriever is available on API Level 8 - // but is hidden until API Level 10 - Class<?> clazz = null; - Object instance = null; - try { - clazz = Class.forName("android.media.MediaMetadataRetriever"); - instance = clazz.newInstance(); - - Method method = clazz.getMethod("setDataSource", String.class); - method.invoke(instance, filePath); - - // The method name changes between API Level 9 and 10. - if (Build.VERSION.SDK_INT <= 9) { - return (Bitmap) clazz.getMethod("captureFrame").invoke(instance); - } else { - byte[] data = (byte[]) clazz.getMethod("getEmbeddedPicture").invoke(instance); - if (data != null) { - Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0, data.length); - if (bitmap != null) return bitmap; - } - return (Bitmap) clazz.getMethod("getFrameAtTime").invoke(instance); - } - } catch (IllegalArgumentException ex) { - // Assume this is a corrupt video file - } catch (RuntimeException ex) { - // Assume this is a corrupt video file. - } catch (InstantiationException e) { - Log.e(TAG, "createVideoThumbnail", e); - } catch (InvocationTargetException e) { - Log.e(TAG, "createVideoThumbnail", e); - } catch (ClassNotFoundException e) { - Log.e(TAG, "createVideoThumbnail", e); - } catch (NoSuchMethodException e) { - Log.e(TAG, "createVideoThumbnail", e); - } catch (IllegalAccessException e) { - Log.e(TAG, "createVideoThumbnail", e); - } finally { - try { - if (instance != null) { - clazz.getMethod("release").invoke(instance); - } - } catch (Exception ignored) { - } - } - return null; - } - - public static byte[] compressToBytes(Bitmap bitmap) { - return compressToBytes(bitmap, DEFAULT_JPEG_QUALITY); - } - - public static byte[] compressToBytes(Bitmap bitmap, int quality) { - ByteArrayOutputStream baos = new ByteArrayOutputStream(65536); - bitmap.compress(CompressFormat.JPEG, quality, baos); - return baos.toByteArray(); - } - - public static boolean isSupportedByRegionDecoder(String mimeType) { - if (mimeType == null) return false; - mimeType = mimeType.toLowerCase(); - return mimeType.startsWith("image/") && - (!mimeType.equals("image/gif") && !mimeType.endsWith("bmp")); - } - - public static boolean isRotationSupported(String mimeType) { - if (mimeType == null) return false; - mimeType = mimeType.toLowerCase(); - return mimeType.equals("image/jpeg"); - } -} |