| /* |
| * 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.EffectContext; |
| import android.os.Parcel; |
| import android.os.Parcelable; |
| |
| import com.android.gallery3d.common.ApiHelper; |
| import com.android.gallery3d.photoeditor.Photo; |
| |
| import java.util.HashMap; |
| |
| /** |
| * Image filter for photo editing; all of its methods must be called from a single GL thread. |
| */ |
| @TargetApi(ApiHelper.VERSION_CODES.ICE_CREAM_SANDWICH) |
| public abstract class Filter implements Parcelable { |
| |
| // TODO: This should be set in MFF instead. |
| private static final int DEFAULT_TILE_SIZE = 640; |
| |
| private static final HashMap<Filter, Effect> effects = new HashMap<Filter, Effect>(); |
| private static EffectContext context; |
| |
| /** |
| * Filter context should be released before the current GL context is lost. |
| */ |
| public static void releaseContext() { |
| if (context != null) { |
| // Release all effects created with the releasing context. |
| for (Effect effect : effects.values()) { |
| effect.release(); |
| } |
| effects.clear(); |
| context.release(); |
| context = null; |
| } |
| } |
| |
| public void release() { |
| Effect effect = effects.remove(this); |
| if (effect != null) { |
| effect.release(); |
| } |
| } |
| |
| protected Effect getEffect(String name) { |
| Effect effect = effects.get(this); |
| if (effect == null) { |
| if (context == null) { |
| context = EffectContext.createWithCurrentGlContext(); |
| } |
| effect = context.getFactory().createEffect(name); |
| effect.setParameter("tile_size", DEFAULT_TILE_SIZE); |
| effects.put(this, effect); |
| } |
| return effect; |
| } |
| |
| /** |
| * Processes the source bitmap and matrix and output the destination bitmap and matrix. |
| * |
| * @param src source photo as the input. |
| * @param dst destination photo having the same dimension as source photo as the output. |
| */ |
| public abstract void process(Photo src, Photo dst); |
| |
| /** |
| * Instantiates CREATOR of subclasses for Parcelable implementations. |
| */ |
| protected static <T extends Filter> Parcelable.Creator<T> creatorOf(Class<T> filterClass) { |
| return new FilterCreator<T>(filterClass); |
| } |
| |
| /** |
| * Saves states for restoring filter later; subclasses can override this to persist states. |
| */ |
| protected void writeToParcel(Parcel out) { |
| } |
| |
| /** |
| * Restores filter from the saved states; subclasses can override this to persist states. |
| */ |
| protected void readFromParcel(Parcel in) { |
| } |
| |
| @Override |
| public int describeContents() { |
| return 0; |
| } |
| |
| @Override |
| public void writeToParcel(Parcel dest, int flags) { |
| writeToParcel(dest); |
| } |
| } |