    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.webp;
    018
    019import java.io.IOException;
    020
    021import org.apache.commons.imaging.ImagingException;
    022import org.apache.commons.imaging.common.BinaryFunctions;
    023import org.apache.commons.imaging.formats.webp.chunks.AbstractWebPChunk;
    024import org.apache.commons.imaging.formats.webp.chunks.WebPChunkAlph;
    025import org.apache.commons.imaging.formats.webp.chunks.WebPChunkAnim;
    026import org.apache.commons.imaging.formats.webp.chunks.WebPChunkAnmf;
    027import org.apache.commons.imaging.formats.webp.chunks.WebPChunkExif;
    028import org.apache.commons.imaging.formats.webp.chunks.WebPChunkIccp;
    029import org.apache.commons.imaging.formats.webp.chunks.WebPChunkVp8;
    030import org.apache.commons.imaging.formats.webp.chunks.WebPChunkVp8l;
    031import org.apache.commons.imaging.formats.webp.chunks.WebPChunkVp8x;
    032import org.apache.commons.imaging.formats.webp.chunks.WebPChunkXml;
    033import org.apache.commons.imaging.formats.webp.chunks.WebPChunkXyzw;
    034
    035/**
    036 * WebP chunk type.
    037 *
    038 * @since 1.0.0-alpha4
    039 */
    040public enum WebPChunkType {
    041
    042    /**
    043     * @see WebPChunkAlph
    044     */
    045    ALPH(WebPChunkAlph::new),
    046
    047    /**
    048     * @see WebPChunkVp8
    049     */
    050    VP8(WebPChunkVp8::new),
    051
    052    /**
    053     * @see WebPChunkVp8l
    054     */
    055    VP8L(WebPChunkVp8l::new),
    056
    057    /**
    058     * @see WebPChunkVp8x
    059     */
    060    VP8X(WebPChunkVp8x::new),
    061
    062    /**
    063     * @see WebPChunkAnim
    064     */
    065    ANIM(WebPChunkAnim::new),
    066
    067    /**
    068     * @see WebPChunkAnmf
    069     */
    070    ANMF(WebPChunkAnmf::new),
    071
    072    /**
    073     * @see WebPChunkIccp
    074     */
    075    ICCP(WebPChunkIccp::new),
    076
    077    /**
    078     * @see WebPChunkExif
    079     */
    080    EXIF(WebPChunkExif::new),
    081
    082    /**
    083     * @see WebPChunkXml
    084     */
    085    XMP(WebPChunkXml::new);
    086
    087    private interface ChunkConstructor {
    088        AbstractWebPChunk make(int type, int size, byte[] bytes) throws IOException, ImagingException;
    089    }
    090
    091    private static final WebPChunkType[] types = values();
    092
    093    static WebPChunkType findType(final int chunkType) {
    094        for (final WebPChunkType type : types) {
    095            if (type.value == chunkType) {
    096                return type;
    097            }
    098        }
    099        return null;
    100    }
    101
    102    static AbstractWebPChunk makeChunk(final int chunkType, final int size, final byte[] bytes) throws IOException, ImagingException {
    103        final WebPChunkType type = findType(chunkType);
    104        return type != null ? type.constructor.make(chunkType, size, bytes) : new WebPChunkXyzw(chunkType, size, bytes);
    105    }
    106
    107    private final ChunkConstructor constructor;
    108    final int value;
    109
    110    WebPChunkType(final ChunkConstructor constructor) {
    111        this.constructor = constructor;
    112        this.value = BinaryFunctions.charsToQuad(name().length() == 4 ? name().charAt(3) : ' ', name().charAt(2), name().charAt(1), name().charAt(0));
    113    }
    114}