diff --git a/transformations/src/main/java/jp/wasabeef/glide/transformations/CropTransformation.java b/transformations/src/main/java/jp/wasabeef/glide/transformations/CropTransformation.java new file mode 100644 index 0000000..3e86642 --- /dev/null +++ b/transformations/src/main/java/jp/wasabeef/glide/transformations/CropTransformation.java @@ -0,0 +1,76 @@ +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.RectF; + +public class CropTransformation implements Transformation { + + private BitmapPool mBitmapPool; + private int mWidth; + private int mHeight; + + public CropTransformation(BitmapPool pool) { + mBitmapPool = pool; + } + + public CropTransformation(BitmapPool pool, int width, int height) { + mBitmapPool = pool; + mWidth = width; + mHeight = height; + } + + @Override + public Resource transform(Resource resource, int outWidth, int outHeight) { + Bitmap source = resource.get(); + if (mWidth == 0) { + mWidth = source.getWidth(); + } + if (mHeight == 0) { + mHeight = source.getHeight(); + } + + float scaleX = (float) mWidth / source.getWidth(); + float scaleY = (float) mHeight / source.getHeight(); + float scale = Math.max(scaleX, scaleY); + + float scaledWidth = scale * source.getWidth(); + float scaledHeight = scale * source.getHeight(); + float left = (mWidth - scaledWidth) / 2; + float top = (mHeight - scaledHeight) / 2; + RectF targetRect = new RectF(left, top, left + scaledWidth, top + scaledHeight); + + Bitmap bitmap = Bitmap.createBitmap(mWidth, mHeight, source.getConfig()); + Canvas canvas = new Canvas(bitmap); + canvas.drawBitmap(source, null, targetRect, null); + source.recycle(); + + return BitmapResource.obtain(bitmap, mBitmapPool); + } + + @Override + public String getId() { + return "CropTransform(width=" + mWidth + ", height=" + mHeight + ")"; + } +}