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Circle transformation for Picasso library, working with GIF files
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/* | |
* Copyright 2014 Julian Shen | |
* | |
* 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.example.picassodemo; | |
import android.graphics.Bitmap; | |
import android.graphics.BitmapShader; | |
import android.graphics.Canvas; | |
import android.graphics.Paint; | |
import com.squareup.picasso.Transformation; | |
public class CircleTransform implements Transformation { | |
private int x; | |
private int y; | |
@Override | |
public Bitmap transform(Bitmap source) { | |
int size = Math.min(source.getWidth(), source.getHeight()); | |
x = (source.getWidth() - size) / 2; | |
y = (source.getHeight() - size) / 2; | |
Bitmap squaredBitmap = Bitmap.createBitmap(source, x, y, size, size); | |
if (squaredBitmap != source) { | |
source.recycle(); | |
} | |
// GIF files generate null configs, assume ARGB_8888 | |
Bitmap.Config config = source.getConfig() != null ? source.getConfig() : Bitmap.Config.ARGB_8888; | |
Bitmap bitmap = Bitmap.createBitmap(size, size, config); | |
Canvas canvas = new Canvas(bitmap); | |
Paint paint = new Paint(); | |
BitmapShader shader = new BitmapShader(squaredBitmap, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP); | |
paint.setShader(shader); | |
paint.setAntiAlias(true); | |
float r = size / 2f; | |
canvas.drawCircle(r, r, r, paint); | |
squaredBitmap.recycle(); | |
return bitmap; | |
} | |
@Override | |
public String key() { | |
return "circle(x=" + x + ",y=" + y + ")"; | |
} | |
} |
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