mirror of
https://github.com/oxen-io/session-android.git
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233 lines
9 KiB
Java
233 lines
9 KiB
Java
package org.thoughtcrime.securesms.util;
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import android.content.Context;
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import android.graphics.Bitmap;
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import android.graphics.Bitmap.CompressFormat;
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import android.graphics.BitmapFactory;
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import android.graphics.Canvas;
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import android.graphics.Matrix;
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import android.graphics.Paint;
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import android.graphics.PorterDuff;
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import android.graphics.PorterDuffXfermode;
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import android.graphics.Rect;
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import android.net.Uri;
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import android.util.Log;
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import android.util.Pair;
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import org.thoughtcrime.securesms.crypto.MasterSecret;
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import org.thoughtcrime.securesms.mms.PartAuthority;
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import java.io.BufferedInputStream;
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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.FileNotFoundException;
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import java.io.IOException;
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import java.io.InputStream;
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import com.android.gallery3d.data.Exif;
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public class BitmapUtil {
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private static final String TAG = BitmapUtil.class.getSimpleName();
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private static final int MAX_COMPRESSION_QUALITY = 95;
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private static final int MIN_COMPRESSION_QUALITY = 50;
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private static final int MAX_COMPRESSION_ATTEMPTS = 4;
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public static byte[] createScaledBytes(Context context, MasterSecret masterSecret, Uri uri, int maxWidth, int maxHeight, int maxSize)
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throws IOException, BitmapDecodingException
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{
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Bitmap bitmap;
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try {
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bitmap = createScaledBitmap(context, masterSecret, uri, maxWidth, maxHeight, false);
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} catch(OutOfMemoryError oome) {
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Log.w(TAG, "OutOfMemoryError when scaling precisely, doing rough scale to save memory instead");
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bitmap = createScaledBitmap(context, masterSecret, uri, maxWidth, maxHeight, true);
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}
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int quality = MAX_COMPRESSION_QUALITY;
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int attempts = 0;
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ByteArrayOutputStream baos;
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do {
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baos = new ByteArrayOutputStream();
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bitmap.compress(Bitmap.CompressFormat.JPEG, quality, baos);
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quality = Math.max((quality * maxSize) / baos.size(), MIN_COMPRESSION_QUALITY);
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} while (baos.size() > maxSize && attempts++ < MAX_COMPRESSION_ATTEMPTS);
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Log.w(TAG, "createScaledBytes(" + uri + ") -> quality " + Math.min(quality, MAX_COMPRESSION_QUALITY) + ", " + attempts + " attempt(s)");
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bitmap.recycle();
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if (baos.size() <= maxSize) return baos.toByteArray();
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else throw new IOException("Unable to scale image below: " + baos.size());
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}
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public static Bitmap createScaledBitmap(Context context, MasterSecret masterSecret, Uri uri, int maxWidth, int maxHeight)
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throws BitmapDecodingException, IOException
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{
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Bitmap bitmap;
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try {
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bitmap = createScaledBitmap(context, masterSecret, uri, maxWidth, maxHeight, false);
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} catch(OutOfMemoryError oome) {
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Log.w(TAG, "OutOfMemoryError when scaling precisely, doing rough scale to save memory instead");
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bitmap = createScaledBitmap(context, masterSecret, uri, maxWidth, maxHeight, true);
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}
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return bitmap;
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}
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private static Bitmap createScaledBitmap(Context context, MasterSecret masterSecret, Uri uri, int maxWidth, int maxHeight, boolean constrainedMemory)
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throws IOException, BitmapDecodingException
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{
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InputStream is = PartAuthority.getPartStream(context, masterSecret, uri);
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if (is == null) throw new IOException("Couldn't obtain InputStream");
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return createScaledBitmap(is,
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PartAuthority.getPartStream(context, masterSecret, uri),
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PartAuthority.getPartStream(context, masterSecret, uri),
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maxWidth, maxHeight, constrainedMemory);
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}
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private static Bitmap createScaledBitmap(InputStream measure, InputStream orientationStream, InputStream data,
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int maxWidth, int maxHeight, boolean constrainedMemory)
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throws BitmapDecodingException
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{
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Bitmap bitmap = createScaledBitmap(measure, data, maxWidth, maxHeight, constrainedMemory);
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return fixOrientation(bitmap, orientationStream);
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}
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private static Bitmap createScaledBitmap(InputStream measure, InputStream data, int maxWidth, int maxHeight,
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boolean constrainedMemory)
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throws BitmapDecodingException
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{
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final BitmapFactory.Options options = getImageDimensions(measure);
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return createScaledBitmap(data, maxWidth, maxHeight, options, constrainedMemory);
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}
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public static Bitmap createScaledBitmap(InputStream measure, InputStream data, float scale)
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throws BitmapDecodingException
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{
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final BitmapFactory.Options options = getImageDimensions(measure);
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final int outWidth = (int)(options.outWidth * scale);
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final int outHeight = (int)(options.outHeight * scale);
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Log.w(TAG, "creating scaled bitmap with scale " + scale + " => " + outWidth + "x" + outHeight);
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return createScaledBitmap(data, outWidth, outHeight, options, false);
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}
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public static Bitmap createScaledBitmap(InputStream measure, InputStream data, int maxWidth, int maxHeight)
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throws BitmapDecodingException
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{
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return createScaledBitmap(measure, data, maxWidth, maxHeight, false);
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}
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private static Bitmap createScaledBitmap(InputStream data, int maxWidth, int maxHeight,
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BitmapFactory.Options options, boolean constrainedMemory)
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throws BitmapDecodingException
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{
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final int imageWidth = options.outWidth;
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final int imageHeight = options.outHeight;
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int scaler = 1;
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int scaleFactor = (constrainedMemory ? 1 : 2);
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while ((imageWidth / scaler / scaleFactor >= maxWidth) && (imageHeight / scaler / scaleFactor >= maxHeight)) {
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scaler *= 2;
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}
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options.inSampleSize = scaler;
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options.inJustDecodeBounds = false;
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BufferedInputStream is = new BufferedInputStream(data);
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Bitmap roughThumbnail = BitmapFactory.decodeStream(is, null, options);
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try {
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is.close();
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} catch (IOException ioe) {
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Log.w(TAG, "IOException thrown when closing an images InputStream", ioe);
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}
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Log.w(TAG, "rough scale " + (imageWidth) + "x" + (imageHeight) +
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" => " + (options.outWidth) + "x" + (options.outHeight));
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if (roughThumbnail == null) {
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throw new BitmapDecodingException("Decoded stream was null.");
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}
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if (constrainedMemory) {
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return roughThumbnail;
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}
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if (options.outWidth > maxWidth || options.outHeight > maxHeight) {
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final float aspectWidth, aspectHeight;
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if (imageWidth == 0 || imageHeight == 0) {
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aspectWidth = maxWidth;
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aspectHeight = maxHeight;
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} else if (options.outWidth >= options.outHeight) {
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aspectWidth = maxWidth;
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aspectHeight = (aspectWidth / options.outWidth) * options.outHeight;
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} else {
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aspectHeight = maxHeight;
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aspectWidth = (aspectHeight / options.outHeight) * options.outWidth;
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}
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final int fineWidth = Math.round(aspectWidth);
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final int fineHeight = Math.round(aspectHeight);
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Log.w(TAG, "fine scale " + options.outWidth + "x" + options.outHeight +
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" => " + fineWidth + "x" + fineHeight);
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Bitmap scaledThumbnail = null;
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try {
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scaledThumbnail = Bitmap.createScaledBitmap(roughThumbnail, fineWidth, fineHeight, true);
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} finally {
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if (roughThumbnail != scaledThumbnail) roughThumbnail.recycle();
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}
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return scaledThumbnail;
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} else {
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return roughThumbnail;
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}
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}
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private static Bitmap fixOrientation(Bitmap bitmap, InputStream orientationStream) {
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final int orientation = Exif.getOrientation(orientationStream);
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if (orientation != 0) {
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return rotateBitmap(bitmap, orientation);
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} else {
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return bitmap;
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}
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}
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private static Bitmap rotateBitmap(Bitmap bitmap, int angle) {
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Matrix matrix = new Matrix();
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matrix.postRotate(angle);
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Bitmap rotated = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true);
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if (rotated != bitmap) bitmap.recycle();
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return rotated;
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}
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private static BitmapFactory.Options getImageDimensions(InputStream inputStream) {
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BitmapFactory.Options options = new BitmapFactory.Options();
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options.inJustDecodeBounds = true;
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BufferedInputStream fis = new BufferedInputStream(inputStream);
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BitmapFactory.decodeStream(fis, null, options);
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try {
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fis.close();
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} catch (IOException ioe) {
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Log.w(TAG, "failed to close the InputStream after reading image dimensions");
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}
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return options;
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}
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public static Pair<Integer, Integer> getDimensions(InputStream inputStream) {
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BitmapFactory.Options options = getImageDimensions(inputStream);
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return new Pair<>(options.outWidth, options.outHeight);
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}
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public static InputStream toCompressedJpeg(Bitmap bitmap) {
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ByteArrayOutputStream thumbnailBytes = new ByteArrayOutputStream();
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bitmap.compress(CompressFormat.JPEG, 85, thumbnailBytes);
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return new ByteArrayInputStream(thumbnailBytes.toByteArray());
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}
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public static byte[] toByteArray(Bitmap bitmap) {
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ByteArrayOutputStream stream = new ByteArrayOutputStream();
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bitmap.compress(Bitmap.CompressFormat.PNG, 100, stream);
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return stream.toByteArray();
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}
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}
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