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/*
* Copyright (C) 2014 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
*/
package com.android.systemui;
import android.graphics.Bitmap;
import android.graphics.BitmapShader;
import android.graphics.Canvas;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.RectF;
import android.graphics.Shader;
public class BitmapHelper {
/**
* Generate a new bitmap (width x height pixels, ARGB_8888) with the input bitmap scaled
* to fit and clipped to an inscribed circle.
* @param input Bitmap to resize and clip
* @param width Width of output bitmap (and diameter of circle)
* @param height Height of output bitmap
* @return A shiny new bitmap for you to use
*/
public static Bitmap createCircularClip(Bitmap input, int width, int height) {
if (input == null) return null;
final int inWidth = input.getWidth();
final int inHeight = input.getHeight();
final Bitmap output = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
final Canvas canvas = new Canvas(output);
final Paint paint = new Paint();
paint.setShader(new BitmapShader(input, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP));
paint.setAntiAlias(true);
final RectF srcRect = new RectF(0, 0, inWidth, inHeight);
final RectF dstRect = new RectF(0, 0, width, height);
final Matrix m = new Matrix();
m.setRectToRect(srcRect, dstRect, Matrix.ScaleToFit.CENTER);
canvas.setMatrix(m);
canvas.drawCircle(inWidth / 2, inHeight / 2, inWidth / 2, paint);
return output;
}
}
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