/* * Copyright 2016 Skynav, Inc. All rights reserved. * Portions Copyright 2009 Extensible Formatting Systems, Inc (XFSI). * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY SKYNAV, INC. AND ITS CONTRIBUTORS “AS IS” AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL SKYNAV, INC. OR ITS CONTRIBUTORS BE LIABLE FOR * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ package com.xfsi.xav.validation.images.png; public final class ChunkValidatorsBIT extends ChunkValidator { public static final class Spec { public static final String section = "4.2.6"; static final byte[] header = ChunkValidatorsBIT.class.getName().substring(ChunkValidatorsBIT.class.getName().length() - ChunkValidator.Spec.Props.typeSize, ChunkValidatorsBIT.class.getName().length()).getBytes(Utils.getCharset()); } void validate() throws PngValidationException { validateMultipleAllowed(Spec.header); validateBeforeChunk(ChunkValidatorPLTE.Spec.header); validateBeforeChunk(ChunkValidatorIDAT.Spec.header); validateBitDepths(); } private void validateBitDepths() throws PngValidationException { // TODO: validate values are less than or equal to sample depth int colorType = png.getColorType(); int bitDepth = png.getBitDepth(); switch (colorType) { case 0: validateDataBytes(0, 1, 1, bitDepth, PngValidator.MsgCode.PNG01E007, Spec.section); break; case 2: validateDataBytes(0, 3, 1, bitDepth, PngValidator.MsgCode.PNG01E007, Spec.section); break; case 3: validateDataBytes(0, 3, 1, 8, PngValidator.MsgCode.PNG01E007, Spec.section); break; case 4: validateDataBytes(0, 2, 1, bitDepth, PngValidator.MsgCode.PNG01E007, Spec.section); break; case 6: validateDataBytes(0, 4, 1, bitDepth, PngValidator.MsgCode.PNG01E007, Spec.section); break; default: break; } } }