src/com/android/gallery3d/photoeditor/filters/StraightenFilter.java

/*
 * 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.annotation.TargetApi;
import android.media.effect.Effect;
import android.media.effect.EffectFactory;
import android.os.Parcel;

import com.android.gallery3d.common.ApiHelper;
import com.android.gallery3d.photoeditor.Photo;

/**
 * Straighten filter applied to the image.
 */
public class StraightenFilter extends Filter {

    public static final Creator<StraightenFilter> CREATOR = creatorOf(StraightenFilter.class);
    public static final float MAX_DEGREES = 45.0f;

    private float degrees;

    public void setAngle(float degrees) {
        this.degrees = degrees;
    }

    @Override
    @TargetApi(ApiHelper.VERSION_CODES.ICE_CREAM_SANDWICH)
    public void process(Photo src, Photo dst) {
        Effect effect = getEffect(EffectFactory.EFFECT_STRAIGHTEN);
        effect.setParameter("maxAngle", MAX_DEGREES);
        effect.setParameter("angle", -degrees);
        effect.apply(src.texture(), src.width(), src.height(), dst.texture());
    }

    @Override
    protected void writeToParcel(Parcel out) {
        out.writeFloat(degrees);
    }

    @Override
    protected void readFromParcel(Parcel in) {
        degrees = in.readFloat();
    }
}