102 lines
2.9 KiB
Java
102 lines
2.9 KiB
Java
|
/*
|
||
|
* Copyright 2015 Christian Basler
|
||
|
*
|
||
|
* 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 ch.dissem.apps.abit;
|
||
|
|
||
|
|
||
|
import android.graphics.*;
|
||
|
import android.graphics.drawable.Drawable;
|
||
|
import ch.dissem.bitmessage.entity.BitmessageAddress;
|
||
|
|
||
|
/**
|
||
|
*
|
||
|
*/
|
||
|
public class Identicon extends Drawable {
|
||
|
private static final int SIZE = 9;
|
||
|
private static final int CENTER_COLUMN = 5;
|
||
|
|
||
|
private final Paint paint;
|
||
|
private float cellWidth;
|
||
|
private float cellHeight;
|
||
|
private byte[] hash;
|
||
|
private int color;
|
||
|
private int background;
|
||
|
private boolean[][] fields;
|
||
|
|
||
|
public Identicon(BitmessageAddress input) {
|
||
|
paint = new Paint();
|
||
|
paint.setStyle(Paint.Style.FILL);
|
||
|
paint.setAntiAlias(true);
|
||
|
|
||
|
hash = input.getRipe();
|
||
|
|
||
|
fields = new boolean[SIZE][SIZE];
|
||
|
color = Color.HSVToColor(new float[]{Math.abs(hash[0] * hash[1] + hash[2]) % 360, 0.8f, 1.0f});
|
||
|
background = Color.HSVToColor(new float[]{Math.abs(hash[1] * hash[2] + hash[0]) % 360, 0.8f, 1.0f});
|
||
|
|
||
|
for (int row = 0; row < SIZE; row++) {
|
||
|
for (int column = 0; column < SIZE; column++) {
|
||
|
fields[row][column] = hash[(row * (column < CENTER_COLUMN ? column : SIZE - column - 1)) % hash.length] >= 0;
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
protected byte getByte(int index) {
|
||
|
return hash[index % hash.length];
|
||
|
}
|
||
|
|
||
|
@Override
|
||
|
public void draw(Canvas canvas) {
|
||
|
float x, y;
|
||
|
paint.setColor(background);
|
||
|
canvas.drawPaint(paint);
|
||
|
paint.setColor(color);
|
||
|
for (int row = 0; row < SIZE; row++) {
|
||
|
for (int column = 0; column < SIZE; column++) {
|
||
|
if (fields[row][column]) {
|
||
|
x = cellWidth * column;
|
||
|
y = cellHeight * row;
|
||
|
|
||
|
canvas.drawCircle(x + cellWidth / 2, y + cellHeight / 2, cellHeight / 2, paint);
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
@Override
|
||
|
public void setAlpha(int alpha) {
|
||
|
paint.setAlpha(alpha);
|
||
|
}
|
||
|
|
||
|
@Override
|
||
|
public void setColorFilter(ColorFilter cf) {
|
||
|
paint.setColorFilter(cf);
|
||
|
}
|
||
|
|
||
|
@Override
|
||
|
public int getOpacity() {
|
||
|
return PixelFormat.OPAQUE;
|
||
|
}
|
||
|
|
||
|
@Override
|
||
|
protected void onBoundsChange(Rect bounds) {
|
||
|
super.onBoundsChange(bounds);
|
||
|
|
||
|
cellWidth = bounds.width() / (float) SIZE;
|
||
|
cellHeight = bounds.height() / (float) SIZE;
|
||
|
}
|
||
|
|
||
|
}
|