    001/*
    002 * Licensed to the Apache Software Foundation (ASF) under one or more
    003 * contributor license agreements.  See the NOTICE file distributed with
    004 * this work for additional information regarding copyright ownership.
    005 * The ASF licenses this file to You under the Apache License, Version 2.0
    006 * (the "License"); you may not use this file except in compliance with
    007 * the License.  You may obtain a copy of the License at
    008 *
    009 *      http://www.apache.org/licenses/LICENSE-2.0
    010 *
    011 * Unless required by applicable law or agreed to in writing, software
    012 * distributed under the License is distributed on an "AS IS" BASIS,
    013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    014 * See the License for the specific language governing permissions and
    015 * limitations under the License.
    016 */
    017package org.apache.commons.imaging.formats.gif;
    018
    019/**
    020 * Describes the disposal of a GIF frame when rendering the animation. Frames that aren't disposed can show through transparent pixels of coming frames. This
    021 * allows new layers to contain just the part of the animation that changes.
    022 */
    023public enum DisposalMethod {
    024
    025    /**
    026     * Typically used for a full-size non-transparent frame that will be replaced by another.
    027     */
    028    UNSPECIFIED,
    029
    030    /**
    031     * The next frame should be rendered on top of this frame.
    032     */
    033    DO_NOT_DISPOSE,
    034
    035    /**
    036     * Dispose the frame and restore the background.
    037     */
    038    RESTORE_TO_BACKGROUND,
    039
    040    /**
    041     * Dispose the frame and restore the previous undisposed frame.
    042     */
    043    RESTORE_TO_PREVIOUS,
    044
    045    /**
    046     * Unused method 1.
    047     */
    048    TO_BE_DEFINED_1,
    049
    050    /**
    051     * Unused method 2.
    052     */
    053    TO_BE_DEFINED_2,
    054
    055    /**
    056     * Unused method 3.
    057     */
    058    TO_BE_DEFINED_3,
    059
    060    /**
    061     * Unused method 4.
    062     */
    063    TO_BE_DEFINED_4
    064}