package eu.janmuller.android.simplecropimage;
/*
* Copyright (C) 2009 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.
*/
import android.app.Activity;
import android.app.ProgressDialog;
import android.graphics.*;
import android.os.Handler;
import android.view.Surface;
import java.io.Closeable;
/**
* Collection of utility functions used in this package.
*/
public class Util {
private static final String TAG = "db.Util";
private Util() {
}
/*
* 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 are 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 IImage.UNCONSTRAINED,
* which indicates no care of the corresponding constraint.
* The functions prefers returning a sample size that
* generates a smaller bitmap, unless minSideLength = IImage.UNCONSTRAINED.
*/
public static Bitmap transform(Matrix scaler,
Bitmap source,
int targetWidth,
int targetHeight,
boolean scaleUp) {
int deltaX = source.getWidth() - targetWidth;
int deltaY = source.getHeight() - targetHeight;
if (!scaleUp && (deltaX < 0 || deltaY < 0)) {
/*
* In this case the bitmap is smaller, at least in one dimension,
* than the target. Transform it by placing as much of the image
* as possible into the target and leaving the top/bottom or
* left/right (or both) black.
*/
Bitmap b2 = Bitmap.createBitmap(targetWidth, targetHeight,
Bitmap.Config.ARGB_8888);
Canvas c = new Canvas(b2);
int deltaXHalf = Math.max(0, deltaX / 2);
int deltaYHalf = Math.max(0, deltaY / 2);
Rect src = new Rect(
deltaXHalf,
deltaYHalf,
deltaXHalf + Math.min(targetWidth, source.getWidth()),
deltaYHalf + Math.min(targetHeight, source.getHeight()));
int dstX = (targetWidth - src.width()) / 2;
int dstY = (targetHeight - src.height()) / 2;
Rect dst = new Rect(
dstX,
dstY,
targetWidth - dstX,
targetHeight - dstY);
c.drawBitmap(source, src, dst, null);
return b2;
}
float bitmapWidthF = source.getWidth();
float bitmapHeightF = source.getHeight();
float bitmapAspect = bitmapWidthF / bitmapHeightF;
float viewAspect = (float) targetWidth / targetHeight;
if (bitmapAspect > viewAspect) {
float scale = targetHeight / bitmapHeightF;
if (scale < .9F || scale > 1F) {
scaler.setScale(scale, scale);
} else {
scaler = null;
}
} else {
float scale = targetWidth / bitmapWidthF;
if (scale < .9F || scale > 1F) {
scaler.setScale(scale, scale);
} else {
scaler = null;
}
}
Bitmap b1;
if (scaler != null) {
// this is used for minithumb and crop, so we want to mFilter here.
b1 = Bitmap.createBitmap(source, 0, 0,
source.getWidth(), source.getHeight(), scaler, true);
} else {
b1 = source;
}
int dx1 = Math.max(0, b1.getWidth() - targetWidth);
int dy1 = Math.max(0, b1.getHeight() - targetHeight);
Bitmap b2 = Bitmap.createBitmap(
b1,
dx1 / 2,
dy1 / 2,
targetWidth,
targetHeight);
if (b1 != source) {
b1.recycle();
}
return b2;
}
public static void closeSilently(Closeable c) {
if (c == null) return;
try {
c.close();
} catch (Throwable t) {
// do nothing
}
}
private static class BackgroundJob
extends MonitoredActivity.LifeCycleAdapter implements Runnable {
private final MonitoredActivity mActivity;
private final ProgressDialog mDialog;
private final Runnable mJob;
private final Handler mHandler;
private final Runnable mCleanupRunner = new Runnable() {
public void run() {
mActivity.removeLifeCycleListener(BackgroundJob.this);
if (mDialog.getWindow() != null) mDialog.dismiss();
}
};
public BackgroundJob(MonitoredActivity activity, Runnable job,
ProgressDialog dialog, Handler handler) {
mActivity = activity;
mDialog = dialog;
mJob = job;
mActivity.addLifeCycleListener(this);
mHandler = handler;
}
public void run() {
try {
mJob.run();
} finally {
mHandler.post(mCleanupRunner);
}
}
@Override
public void onActivityDestroyed(MonitoredActivity activity) {
// We get here only when the onDestroyed being called before
// the mCleanupRunner. So, run it now and remove it from the queue
mCleanupRunner.run();
mHandler.removeCallbacks(mCleanupRunner);
}
@Override
public void onActivityStopped(MonitoredActivity activity) {
mDialog.hide();
}
@Override
public void onActivityStarted(MonitoredActivity activity) {
mDialog.show();
}
}
public static void startBackgroundJob(MonitoredActivity activity,
String title, String message, Runnable job, Handler handler) {
// Make the progress dialog uncancelable, so that we can gurantee
// the thread will be done before the activity getting destroyed.
ProgressDialog dialog = ProgressDialog.show(
activity, title, message, true, false);
new Thread(new BackgroundJob(activity, job, dialog, handler)).start();
}
// Returns Options that set the puregeable flag for Bitmap decode.
public static BitmapFactory.Options createNativeAllocOptions() {
BitmapFactory.Options options = new BitmapFactory.Options();
//options.inNativeAlloc = true;
return options;
}
// Thong added for rotate
public static Bitmap rotateImage(Bitmap src, float degree) {
// create new matrix
Matrix matrix = new Matrix();
// setup rotation degree
matrix.postRotate(degree);
Bitmap bmp = Bitmap.createBitmap(src, 0, 0, src.getWidth(), src.getHeight(), matrix, true);
return bmp;
}
public static int getOrientationInDegree(Activity activity) {
int rotation = activity.getWindowManager().getDefaultDisplay()
.getRotation();
int degrees = 0;
switch (rotation) {
case Surface.ROTATION_0:
degrees = 0;
break;
case Surface.ROTATION_90:
degrees = 90;
break;
case Surface.ROTATION_180:
degrees = 180;
break;
case Surface.ROTATION_270:
degrees = 270;
break;
}
return degrees;
}
}