/
CropTransformation.java
executable file
·122 lines (96 loc) · 3.54 KB
/
CropTransformation.java
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package jp.wasabeef.glide.transformations;
/**
* Copyright (C) 2020 Wasabeef
* <p>
* 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
* <p>
* http://www.apache.org/licenses/LICENSE-2.0
* <p>
* 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 android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.RectF;
import androidx.annotation.NonNull;
import com.bumptech.glide.load.engine.bitmap_recycle.BitmapPool;
import java.security.MessageDigest;
public class CropTransformation extends BitmapTransformation {
private static final int VERSION = 1;
private static final String ID = "jp.wasabeef.glide.transformations.CropTransformation." + VERSION;
public enum CropType {
TOP,
CENTER,
BOTTOM
}
private int width;
private int height;
private CropType cropType = CropType.CENTER;
public CropTransformation(int width, int height) {
this(width, height, CropType.CENTER);
}
public CropTransformation(int width, int height, CropType cropType) {
this.width = width;
this.height = height;
this.cropType = cropType;
}
@Override
protected Bitmap transform(@NonNull Context context, @NonNull BitmapPool pool,
@NonNull Bitmap toTransform, int outWidth, int outHeight) {
width = width == 0 ? toTransform.getWidth() : width;
height = height == 0 ? toTransform.getHeight() : height;
Bitmap.Config config =
toTransform.getConfig() != null ? toTransform.getConfig() : Bitmap.Config.ARGB_8888;
Bitmap bitmap = pool.get(width, height, config);
bitmap.setHasAlpha(true);
float scaleX = (float) width / toTransform.getWidth();
float scaleY = (float) height / toTransform.getHeight();
float scale = Math.max(scaleX, scaleY);
float scaledWidth = scale * toTransform.getWidth();
float scaledHeight = scale * toTransform.getHeight();
float left = (width - scaledWidth) / 2;
float top = getTop(scaledHeight);
RectF targetRect = new RectF(left, top, left + scaledWidth, top + scaledHeight);
setCanvasBitmapDensity(toTransform, bitmap);
Canvas canvas = new Canvas(bitmap);
canvas.drawBitmap(toTransform, null, targetRect, null);
return bitmap;
}
private float getTop(float scaledHeight) {
switch (cropType) {
case TOP:
return 0;
case CENTER:
return (height - scaledHeight) / 2;
case BOTTOM:
return height - scaledHeight;
default:
return 0;
}
}
@Override
public String toString() {
return "CropTransformation(width=" + width + ", height=" + height + ", cropType=" + cropType + ")";
}
@Override
public boolean equals(Object o) {
return o instanceof CropTransformation &&
((CropTransformation) o).width == width &&
((CropTransformation) o).height == height &&
((CropTransformation) o).cropType == cropType;
}
@Override
public int hashCode() {
return ID.hashCode() + width * 100000 + height * 1000 + cropType.ordinal() * 10;
}
@Override
public void updateDiskCacheKey(@NonNull MessageDigest messageDigest) {
messageDigest.update((ID + width + height + cropType).getBytes(CHARSET));
}
}