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/*
* Copyright (c) 2014, Harald Kuhr
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* * 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.
*
* * Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT HOLDER OR 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.twelvemonkeys.imageio.plugins.psd;
import javax.imageio.IIOException;
import javax.imageio.stream.ImageInputStream;
import java.io.IOException;
/**
* PSDLayerBlendMode
*
* @author Harald Kuhr
* @author last modified by $Author: haraldk$
* @version $Id: PSDLayerBlendMode.java,v 1.0 May 8, 2008 4:34:35 PM haraldk Exp$
*/
final class PSDLayerBlendMode {
final int blendMode;
final int opacity; // 0-255
final int clipping; // 0: base, 1: non-base
final byte flags;
public PSDLayerBlendMode(final ImageInputStream pInput) throws IOException {
int blendModeSig = pInput.readInt();
if (blendModeSig != PSD.RESOURCE_TYPE) {
throw new IIOException("Illegal PSD Blend Mode signature, expected 8BIM: " + PSDUtil.intToStr(blendModeSig));
}
blendMode = pInput.readInt();
opacity = pInput.readUnsignedByte();
clipping = pInput.readUnsignedByte();
flags = pInput.readByte();
pInput.readByte(); // Pad
}
@Override
public String toString() {
StringBuilder builder = new StringBuilder(getClass().getSimpleName());
builder.append("[");
builder.append("mode: \"").append(PSDUtil.intToStr(blendMode));
builder.append("\", opacity: ").append(opacity);
builder.append(", clipping: ").append(clipping);
switch (clipping) {
case 0:
builder.append(" (base)");
break;
case 1:
builder.append(" (non-base)");
break;
default:
builder.append(" (unknown)");
break;
}
builder.append(", flags: ").append(byteToBinary(flags));
/*
bit 0 = transparency protected; bit 1 = visible; bit 2 = obsolete;
bit 3 = 1 for Photoshop 5.0 and later, tells if bit 4 has useful information;
bit 4 = pixel data irrelevant to appearance of document
*/
builder.append(" (");
if ((flags & 0x01) != 0) {
builder.append("Transp. protected, ");
}
if ((flags & 0x02) != 0) {
builder.append("Hidden, ");
}
if ((flags & 0x04) != 0) {
builder.append("Obsolete bit, ");
}
if ((flags & 0x08) != 0) {
builder.append("PS 5.0 data present, "); // "tells if next bit has useful information"...
}
if ((flags & 0x10) != 0) {
builder.append("Pixel data irrelevant, ");
}
if ((flags & 0x20) != 0) {
builder.append("Unknown bit 5, ");
}
if ((flags & 0x40) != 0) {
builder.append("Unknown bit 6, ");
}
if ((flags & 0x80) != 0) {
builder.append("Unknown bit 7, ");
}
// Stupidity...
if (flags != 0) {
builder.delete(builder.length() - 2, builder.length());
}
builder.append(")");
builder.append("]");
return builder.toString();
}
private static String byteToBinary(final int pFlags) {
String flagStr = Integer.toBinaryString(pFlags);
flagStr = "00000000".substring(flagStr.length()) + flagStr;
return flagStr;
}
}