/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * 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.android.gallery3d.photoeditor.filters;

import android.graphics.RectF;
import android.media.effect.Effect;
import android.media.effect.EffectFactory;
import android.os.Parcel;

import com.android.gallery3d.photoeditor.Photo;

/**
 * Crop filter applied to the image.
 */
public class CropFilter extends Filter {

    public static final Creator<CropFilter> CREATOR = creatorOf(CropFilter.class);

    private RectF bounds;

    /**
     * The rect coordinates used here should range from 0 to 1.
     */
    public void setCropBounds(RectF bounds) {
        this.bounds = bounds;
        validate();
    }

    @Override
    public void process(Photo src, Photo dst) {
        dst.changeDimension(Math.round(bounds.width() * src.width()),
                Math.round(bounds.height() * src.height()));

        Effect effect = getEffect(EffectFactory.EFFECT_CROP);
        effect.setParameter("xorigin", Math.round(bounds.left * src.width()));
        effect.setParameter("yorigin", Math.round(bounds.top * src.height()));
        effect.setParameter("width", dst.width());
        effect.setParameter("height", dst.height());
        effect.apply(src.texture(), src.width(), src.height(), dst.texture());
    }

    @Override
    protected void writeToParcel(Parcel out) {
        out.writeParcelable(bounds, 0);
    }

    @Override
    protected void readFromParcel(Parcel in) {
        bounds = in.readParcelable(null);
    }
}