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mirror of https://github.com/wasabeef/glide-transformations.git synced 2025-06-08 15:34:04 +08:00

add Grayscale

This commit is contained in:
furiya-daichi 2015-01-11 22:45:18 +09:00
parent 2a08429c67
commit 88c138e2b4

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package jp.wasabeef.glide.transformations;
/**
* Copyright (C) 2015 Wasabeef
*
* 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.
*/
import com.bumptech.glide.load.Transformation;
import com.bumptech.glide.load.engine.Resource;
import com.bumptech.glide.load.engine.bitmap_recycle.BitmapPool;
import com.bumptech.glide.load.resource.bitmap.BitmapResource;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.ColorMatrix;
import android.graphics.ColorMatrixColorFilter;
import android.graphics.Paint;
public class GrayscaleTransformation implements Transformation<Bitmap> {
private BitmapPool mBitmapPool;
public GrayscaleTransformation(BitmapPool pool) {
mBitmapPool = pool;
}
@Override
public Resource<Bitmap> transform(Resource<Bitmap> resource, int outWidth, int outHeight) {
Bitmap source = resource.get();
int width = source.getWidth();
int height = source.getHeight();
Bitmap bitmap = Bitmap.createBitmap(outWidth, outHeight, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
ColorMatrix saturation = new ColorMatrix();
saturation.setSaturation(0f);
Paint paint = new Paint();
paint.setColorFilter(new ColorMatrixColorFilter(saturation));
canvas.drawBitmap(source, 0, 0, paint);
source.recycle();
return BitmapResource.obtain(bitmap, mBitmapPool);
}
@Override
public String getId() {
return "GrayscaleTransformation()";
}
}