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/*
* Copyright (C) 2013-2014 The CyanogenMod 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 org.lineageos.internal.util;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Point;
import android.util.Log;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
public class ImageUtils {
private static final String TAG = ImageUtils.class.getSimpleName();
private static final String ASSET_URI_PREFIX = "file:///android_asset/";
private static final int DEFAULT_IMG_QUALITY = 100;
/**
* Gets the Width and Height of the image
*
* @param inputStream The input stream of the image
*
* @return A point structure that holds the Width and Height (x and y)/*"
*/
public static Point getImageDimension(InputStream inputStream) {
if (inputStream == null) {
throw new IllegalArgumentException("'inputStream' cannot be null!");
}
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeStream(inputStream, null, options);
Point point = new Point(options.outWidth,options.outHeight);
return point;
}
/**
* Crops the input image and returns a new InputStream of the cropped area
*
* @param inputStream The input stream of the image
* @param imageWidth Width of the input image
* @param imageHeight Height of the input image
* @param inputStream Desired Width
* @param inputStream Desired Width
*
* @return a new InputStream of the cropped area/*"
*/
public static InputStream cropImage(InputStream inputStream, int imageWidth, int imageHeight,
int outWidth, int outHeight) throws IllegalArgumentException {
if (inputStream == null){
throw new IllegalArgumentException("inputStream cannot be null");
}
if (imageWidth <= 0 || imageHeight <= 0) {
throw new IllegalArgumentException(
String.format("imageWidth and imageHeight must be > 0: imageWidth=%d" +
" imageHeight=%d", imageWidth, imageHeight));
}
if (outWidth <= 0 || outHeight <= 0) {
throw new IllegalArgumentException(
String.format("outWidth and outHeight must be > 0: outWidth=%d" +
" outHeight=%d", imageWidth, outHeight));
}
int scaleDownSampleSize = Math.min(imageWidth / outWidth, imageHeight / outHeight);
if (scaleDownSampleSize > 0) {
imageWidth /= scaleDownSampleSize;
imageHeight /= scaleDownSampleSize;
} else {
float ratio = (float) outWidth / outHeight;
if (imageWidth < imageHeight * ratio) {
outWidth = imageWidth;
outHeight = (int) (outWidth / ratio);
} else {
outHeight = imageHeight;
outWidth = (int) (outHeight * ratio);
}
}
int left = (imageWidth - outWidth) / 2;
int top = (imageHeight - outHeight) / 2;
InputStream compressed = null;
try {
BitmapFactory.Options options = new BitmapFactory.Options();
if (scaleDownSampleSize > 1) {
options.inSampleSize = scaleDownSampleSize;
}
Bitmap bitmap = BitmapFactory.decodeStream(inputStream, null, options);
if (bitmap == null) {
return null;
}
Bitmap cropped = Bitmap.createBitmap(bitmap, left, top, outWidth, outHeight);
ByteArrayOutputStream tmpOut = new ByteArrayOutputStream(2048);
if (cropped.compress(Bitmap.CompressFormat.PNG, DEFAULT_IMG_QUALITY, tmpOut)) {
byte[] outByteArray = tmpOut.toByteArray();
compressed = new ByteArrayInputStream(outByteArray);
}
} catch (Exception e) {
Log.e(TAG, "Exception " + e);
}
return compressed;
}
}
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