/**
* This file is part of FileSpace for Android, an app for managing your server (files, talks...).
* <p/>
* Copyright (c) 2014-2015 FileSpace for Android contributors (http://mercandalli.com)
* <p/>
* LICENSE:
* <p/>
* FileSpace for Android is free software: you can redistribute it and/or modify it under the terms of the GNU General
* Public License as published by the Free Software Foundation, either version 2 of the License, or (at your option) any
* later version.
* <p/>
* FileSpace for Android is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the
* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* @author Jonathan Mercandalli
* @license http://www.gnu.org/licenses/gpl.html
* @copyright 2014-2015 FileSpace for Android contributors (http://mercandalli.com)
*/
package com.mercandalli.android.apps.files.common.util;
import android.content.Context;
import android.content.res.ColorStateList;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.drawable.ColorDrawable;
import android.graphics.drawable.RippleDrawable;
import android.media.ThumbnailUtils;
import android.os.AsyncTask;
import android.util.Log;
import com.mercandalli.android.apps.files.common.listener.IBitmapListener;
import com.mercandalli.android.apps.files.main.Constants;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.Map;
import java.util.WeakHashMap;
/**
* Created by Jonathan on 29/05/2015.
*/
public class ImageUtils {
private static final String FILE_NAME_PREFIX = "/file_";
private static Map<Integer, Bitmap> images = new WeakHashMap<Integer, Bitmap>();
public synchronized static void saveImage(Context context, int fileId, Bitmap bm) {
images.put(fileId, bm);
File file = new File(context.getFilesDir() + FILE_NAME_PREFIX + fileId);
if (file.exists()) {
return;
}
FileOutputStream fOut;
try {
fOut = new FileOutputStream(context.getFilesDir() + FILE_NAME_PREFIX + fileId);
bm.compress(Bitmap.CompressFormat.JPEG, 100, fOut);
fOut.flush();
fOut.close();
} catch (Exception e) {
}
}
public static Bitmap loadImageThumbnail(String path, int desiredWidth, int desiredHeight) {
return ThumbnailUtils.extractThumbnail(BitmapFactory.decodeFile(path), desiredWidth, desiredHeight);
}
public static Bitmap loadImageThumbnail(File file, int desiredWidth, int desiredHeight) {
return loadImageThumbnail(file.getAbsolutePath(), desiredWidth, desiredHeight);
}
public static Bitmap loadImage(File file) {
try {
FileInputStream fis = new FileInputStream(file);
Bitmap imageBitmap = BitmapFactory.decodeStream(fis);
return imageBitmap;
} catch (Exception ex) {
}
return null;
}
public synchronized static Bitmap loadImage(Context context, int fileId) {
if (images.containsKey(fileId)) {
return images.get(fileId);
}
File file = new File(context.getFilesDir() + FILE_NAME_PREFIX + fileId);
if (file.exists()) {
int desiredWidth = Constants.WIDTH_MAX_ONLINE_PICTURE_BITMAP;
// Get the source image's dimensions
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeFile(file.getPath(), options);
int srcWidth = options.outWidth;
// Only scale if the source is big enough. This code is just trying to fit a image into a certain width.
if (desiredWidth > srcWidth) {
desiredWidth = srcWidth;
}
// Calculate the correct inSampleSize/scale value. This helps reduce memory use. It should be a power of 2
// from: http://stackoverflow.com/questions/477572/android-strange-out-of-memory-issue/823966#823966
int inSampleSize = 1;
while (srcWidth / 2 > desiredWidth) {
srcWidth /= 2;
inSampleSize *= 2;
}
float desiredScale = (float) desiredWidth / srcWidth;
// Decode with inSampleSize
options.inJustDecodeBounds = false;
options.inDither = false;
options.inSampleSize = inSampleSize;
options.inScaled = false;
options.inPreferredConfig = Bitmap.Config.ARGB_8888;
Bitmap sampledSrcBitmap = BitmapFactory.decodeFile(file.getPath(), options);
// Resize
Matrix matrix = new Matrix();
matrix.postScale(desiredScale, desiredScale);
return Bitmap.createBitmap(sampledSrcBitmap, 0, 0, sampledSrcBitmap.getWidth(), sampledSrcBitmap.getHeight(), matrix, true);
//return BitmapFactory.decodeFile(file.getPath(), options);
}
Log.e("TaskGetDownloadImage", "loadImage(String url) return null");
return null;
}
public synchronized static boolean isImage(Context context, int fileId) {
if (images.containsKey(fileId)) {
return true;
}
File file = new File(context.getFilesDir() + FILE_NAME_PREFIX + fileId);
return file.exists();
}
public static Bitmap setBlur(Bitmap sentBitmap, int radius) {
// Stack Blur v1.0 from
// http://www.quasimondo.com/StackBlurForCanvas/StackBlurDemo.html
//
// Java Author: Mario Klingemann <mario at quasimondo.com>
// http://incubator.quasimondo.com
// created Feburary 29, 2004
// Android port : Yahel Bouaziz <yahel at kayenko.com>
// http://www.kayenko.com
// ported april 5th, 2012
// This is a compromise between Gaussian Blur and Box blur
// It creates much better looking blurs than Box Blur, but is
// 7x faster than my Gaussian Blur implementation.
//
// I called it Stack Blur because this describes best how this
// filter works internally: it creates a kind of moving stack
// of colors whilst scanning through the image. Thereby it
// just has to add one new block of color to the right side
// of the stack and remove the leftmost color. The remaining
// colors on the topmost layer of the stack are either added on
// or reduced by one, depending on if they are on the right or
// on the left side of the stack.
//
// If you are using this algorithm in your code please add
// the following line:
//
// Stack Blur Algorithm by Mario Klingemann <mario@quasimondo.com>
Bitmap bitmap = sentBitmap.copy(sentBitmap.getConfig(), true);
if (radius < 1) {
return (null);
}
int w = bitmap.getWidth();
int h = bitmap.getHeight();
int[] pix = new int[w * h];
Log.e("pix", w + " " + h + " " + pix.length);
bitmap.getPixels(pix, 0, w, 0, 0, w, h);
int wm = w - 1;
int hm = h - 1;
int wh = w * h;
int div = radius + radius + 1;
int r[] = new int[wh];
int g[] = new int[wh];
int b[] = new int[wh];
int rsum, gsum, bsum, x, y, i, p, yp, yi, yw;
int vmin[] = new int[Math.max(w, h)];
int divsum = (div + 1) >> 1;
divsum *= divsum;
int dv[] = new int[256 * divsum];
for (i = 0; i < 256 * divsum; i++) {
dv[i] = (i / divsum);
}
yw = yi = 0;
int[][] stack = new int[div][3];
int stackpointer;
int stackstart;
int[] sir;
int rbs;
int r1 = radius + 1;
int routsum, goutsum, boutsum;
int rinsum, ginsum, binsum;
for (y = 0; y < h; y++) {
rinsum = ginsum = binsum = routsum = goutsum = boutsum = rsum = gsum = bsum = 0;
for (i = -radius; i <= radius; i++) {
p = pix[yi + Math.min(wm, Math.max(i, 0))];
sir = stack[i + radius];
sir[0] = (p & 0xff0000) >> 16;
sir[1] = (p & 0x00ff00) >> 8;
sir[2] = (p & 0x0000ff);
rbs = r1 - Math.abs(i);
rsum += sir[0] * rbs;
gsum += sir[1] * rbs;
bsum += sir[2] * rbs;
if (i > 0) {
rinsum += sir[0];
ginsum += sir[1];
binsum += sir[2];
} else {
routsum += sir[0];
goutsum += sir[1];
boutsum += sir[2];
}
}
stackpointer = radius;
for (x = 0; x < w; x++) {
r[yi] = dv[rsum];
g[yi] = dv[gsum];
b[yi] = dv[bsum];
rsum -= routsum;
gsum -= goutsum;
bsum -= boutsum;
stackstart = stackpointer - radius + div;
sir = stack[stackstart % div];
routsum -= sir[0];
goutsum -= sir[1];
boutsum -= sir[2];
if (y == 0) {
vmin[x] = Math.min(x + radius + 1, wm);
}
p = pix[yw + vmin[x]];
sir[0] = (p & 0xff0000) >> 16;
sir[1] = (p & 0x00ff00) >> 8;
sir[2] = (p & 0x0000ff);
rinsum += sir[0];
ginsum += sir[1];
binsum += sir[2];
rsum += rinsum;
gsum += ginsum;
bsum += binsum;
stackpointer = (stackpointer + 1) % div;
sir = stack[(stackpointer) % div];
routsum += sir[0];
goutsum += sir[1];
boutsum += sir[2];
rinsum -= sir[0];
ginsum -= sir[1];
binsum -= sir[2];
yi++;
}
yw += w;
}
for (x = 0; x < w; x++) {
rinsum = ginsum = binsum = routsum = goutsum = boutsum = rsum = gsum = bsum = 0;
yp = -radius * w;
for (i = -radius; i <= radius; i++) {
yi = Math.max(0, yp) + x;
sir = stack[i + radius];
sir[0] = r[yi];
sir[1] = g[yi];
sir[2] = b[yi];
rbs = r1 - Math.abs(i);
rsum += r[yi] * rbs;
gsum += g[yi] * rbs;
bsum += b[yi] * rbs;
if (i > 0) {
rinsum += sir[0];
ginsum += sir[1];
binsum += sir[2];
} else {
routsum += sir[0];
goutsum += sir[1];
boutsum += sir[2];
}
if (i < hm) {
yp += w;
}
}
yi = x;
stackpointer = radius;
for (y = 0; y < h; y++) {
// Preserve alpha channel: ( 0xff000000 & pix[yi] )
pix[yi] = (0xff000000 & pix[yi]) | (dv[rsum] << 16) | (dv[gsum] << 8) | dv[bsum];
rsum -= routsum;
gsum -= goutsum;
bsum -= boutsum;
stackstart = stackpointer - radius + div;
sir = stack[stackstart % div];
routsum -= sir[0];
goutsum -= sir[1];
boutsum -= sir[2];
if (x == 0) {
vmin[y] = Math.min(y + r1, hm) * w;
}
p = x + vmin[y];
sir[0] = r[p];
sir[1] = g[p];
sir[2] = b[p];
rinsum += sir[0];
ginsum += sir[1];
binsum += sir[2];
rsum += rinsum;
gsum += ginsum;
bsum += binsum;
stackpointer = (stackpointer + 1) % div;
sir = stack[stackpointer];
routsum += sir[0];
goutsum += sir[1];
boutsum += sir[2];
rinsum -= sir[0];
ginsum -= sir[1];
binsum -= sir[2];
yi += w;
}
}
Log.d("pix", w + " " + h + " " + pix.length);
bitmap.setPixels(pix, 0, w, 0, 0, w, h);
return (bitmap);
}
public static Bitmap setBrightness(Bitmap src, int value) {
// original image size
int width = src.getWidth();
int height = src.getHeight();
// create output bitmap
Bitmap bmOut = Bitmap.createBitmap(width, height, src.getConfig());
// color information
int A, R, G, B;
int pixel;
// scan through all pixels
for (int x = 0; x < width; ++x) {
for (int y = 0; y < height; ++y) {
// get pixel color
pixel = src.getPixel(x, y);
A = Color.alpha(pixel);
R = Color.red(pixel);
G = Color.green(pixel);
B = Color.blue(pixel);
// increase/decrease each channel
R += value;
if (R > 255) {
R = 255;
} else if (R < 0) {
R = 0;
}
G += value;
if (G > 255) {
G = 255;
} else if (G < 0) {
G = 0;
}
B += value;
if (B > 255) {
B = 255;
} else if (B < 0) {
B = 0;
}
// apply new pixel color to output bitmap
bmOut.setPixel(x, y, Color.argb(A, R, G, B));
}
}
// return final image
return bmOut;
}
public static Bitmap setContrast(Bitmap src, double value) {
// image size
int width = src.getWidth();
int height = src.getHeight();
// create output bitmap
// create a mutable empty bitmap
Bitmap bmOut = Bitmap.createBitmap(width, height, src.getConfig());
// create a canvas so that we can draw the bmOut Bitmap from source bitmap
Canvas c = new Canvas();
c.setBitmap(bmOut);
// draw bitmap to bmOut from src bitmap so we can modify it
c.drawBitmap(src, 0, 0, new Paint(Color.BLACK));
// color information
int A, R, G, B;
int pixel;
// get contrast value
double contrast = Math.pow((100 + value) / 100, 2);
// scan through all pixels
for (int x = 0; x < width; ++x) {
for (int y = 0; y < height; ++y) {
// get pixel color
pixel = src.getPixel(x, y);
A = Color.alpha(pixel);
// apply filter contrast for every channel R, G, B
R = Color.red(pixel);
R = (int) (((((R / 255.0) - 0.5) * contrast) + 0.5) * 255.0);
if (R < 0) {
R = 0;
} else if (R > 255) {
R = 255;
}
G = Color.green(pixel);
G = (int) (((((G / 255.0) - 0.5) * contrast) + 0.5) * 255.0);
if (G < 0) {
G = 0;
} else if (G > 255) {
G = 255;
}
B = Color.blue(pixel);
B = (int) (((((B / 255.0) - 0.5) * contrast) + 0.5) * 255.0);
if (B < 0) {
B = 0;
} else if (B > 255) {
B = 255;
}
// set new pixel color to output bitmap
bmOut.setPixel(x, y, Color.argb(A, R, G, B));
}
}
return bmOut;
}
/**
* Create drawable with ripple
*
* @param normalColor
* @param pressedColor
* @return
*/
public static RippleDrawable getPressedColorRippleDrawable(int normalColor, int pressedColor) {
return new RippleDrawable(getPressedColorSelector(normalColor, pressedColor), getColorDrawableFromColor(normalColor), null);
}
public static ColorStateList getPressedColorSelector(int normalColor, int pressedColor) {
return new ColorStateList(
new int[][]{
new int[]{android.R.attr.state_pressed},
new int[]{android.R.attr.state_focused},
new int[]{android.R.attr.state_activated},
new int[]{}
},
new int[]{
pressedColor,
pressedColor,
pressedColor,
normalColor
}
);
}
public static ColorDrawable getColorDrawableFromColor(int color) {
return new ColorDrawable(color);
}
/**
* Load async local images
*/
public static class LocalBitmapTask extends AsyncTask<Void, Void, Bitmap> {
File file;
IBitmapListener outputListener;
int width, height;
public LocalBitmapTask(File file, IBitmapListener outputListener, int width, int height) {
this.file = file;
this.outputListener = outputListener;
this.width = width;
this.height = height;
}
@Override
protected Bitmap doInBackground(Void... params) {
return ImageUtils.loadImageThumbnail(this.file, width, height);
}
@Override
protected void onPostExecute(Bitmap response) {
outputListener.execute(response);
}
}
}