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/*
* Copyright 2002-2017 Drew Noakes
*
* 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.
*
* More information about this project is available at:
*
* https://drewnoakes.com/code/exif/
* https://github.com/drewnoakes/metadata-extractor
*/
package com.drew.metadata.photoshop;
import com.drew.lang.annotations.NotNull;
import com.drew.lang.annotations.Nullable;
import com.drew.metadata.TagDescriptor;
import static com.drew.metadata.photoshop.PsdHeaderDirectory.*;
/**
* @author Drew Noakes https://drewnoakes.com
*/
@SuppressWarnings("WeakerAccess")
public class PsdHeaderDescriptor extends TagDescriptor<PsdHeaderDirectory>
{
public PsdHeaderDescriptor(@NotNull PsdHeaderDirectory directory)
{
super(directory);
}
@Override
public String getDescription(int tagType)
{
switch (tagType) {
case TAG_CHANNEL_COUNT:
return getChannelCountDescription();
case TAG_BITS_PER_CHANNEL:
return getBitsPerChannelDescription();
case TAG_COLOR_MODE:
return getColorModeDescription();
case TAG_IMAGE_HEIGHT:
return getImageHeightDescription();
case TAG_IMAGE_WIDTH:
return getImageWidthDescription();
default:
return super.getDescription(tagType);
}
}
@Nullable
public String getChannelCountDescription()
{
// Supported range is 1 to 56.
Integer value = _directory.getInteger(TAG_CHANNEL_COUNT);
if (value == null)
return null;
return value + " channel" + (value == 1 ? "" : "s");
}
@Nullable
public String getBitsPerChannelDescription()
{
// Supported values are 1, 8, 16 and 32.
Integer value = _directory.getInteger(TAG_BITS_PER_CHANNEL);
if (value == null)
return null;
return value + " bit" + (value == 1 ? "" : "s") + " per channel";
}
@Nullable
public String getColorModeDescription()
{
return getIndexedDescription(TAG_COLOR_MODE,
"Bitmap",
"Grayscale",
"Indexed",
"RGB",
"CMYK",
null,
null,
"Multichannel",
"Duotone",
"Lab");
}
@Nullable
public String getImageHeightDescription()
{
Integer value = _directory.getInteger(TAG_IMAGE_HEIGHT);
if (value == null)
return null;
return value + " pixel" + (value == 1 ? "" : "s");
}
@Nullable
public String getImageWidthDescription()
{
try {
Integer value = _directory.getInteger(TAG_IMAGE_WIDTH);
if (value == null)
return null;
return value + " pixel" + (value == 1 ? "" : "s");
} catch (Exception e) {
return null;
}
}
}
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