55 lines
2.1 KiB
Java
55 lines
2.1 KiB
Java
/*
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License
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*/
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package com.android.systemui;
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import android.graphics.Bitmap;
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import android.graphics.BitmapShader;
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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.RectF;
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import android.graphics.Shader;
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public class BitmapHelper {
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/**
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* Generate a new bitmap (width x height pixels, ARGB_8888) with the input bitmap scaled
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* to fit and clipped to an inscribed circle.
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* @param input Bitmap to resize and clip
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* @param width Width of output bitmap (and diameter of circle)
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* @param height Height of output bitmap
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* @return A shiny new bitmap for you to use
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*/
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public static Bitmap createCircularClip(Bitmap input, int width, int height) {
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if (input == null) return null;
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final int inWidth = input.getWidth();
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final int inHeight = input.getHeight();
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final Bitmap output = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
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final Canvas canvas = new Canvas(output);
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final Paint paint = new Paint();
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paint.setShader(new BitmapShader(input, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP));
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paint.setAntiAlias(true);
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final RectF srcRect = new RectF(0, 0, inWidth, inHeight);
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final RectF dstRect = new RectF(0, 0, width, height);
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final Matrix m = new Matrix();
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m.setRectToRect(srcRect, dstRect, Matrix.ScaleToFit.CENTER);
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canvas.setMatrix(m);
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canvas.drawCircle(inWidth / 2, inHeight / 2, inWidth / 2, paint);
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return output;
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}
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}
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