com.drew.metadata.icc.IccReader Maven / Gradle / Ivy
/*
* 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.icc;
import com.drew.imaging.jpeg.JpegSegmentMetadataReader;
import com.drew.imaging.jpeg.JpegSegmentType;
import com.drew.lang.ByteArrayReader;
import com.drew.lang.DateUtil;
import com.drew.lang.RandomAccessReader;
import com.drew.lang.annotations.NotNull;
import com.drew.lang.annotations.Nullable;
import com.drew.metadata.Directory;
import com.drew.metadata.Metadata;
import com.drew.metadata.MetadataReader;
import java.io.IOException;
import java.util.Collections;
/**
* Reads an ICC profile.
*
* More information about ICC:
*
* - http://en.wikipedia.org/wiki/ICC_profile
* - http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/ICC_Profile.html
* - https://developer.apple.com/library/mac/samplecode/ImageApp/Listings/ICC_h.html
*
*
* @author Yuri Binev
* @author Drew Noakes https://drewnoakes.com
*/
public class IccReader implements JpegSegmentMetadataReader, MetadataReader
{
public static final String JPEG_SEGMENT_PREAMBLE = "ICC_PROFILE";
@NotNull
public Iterable getSegmentTypes()
{
return Collections.singletonList(JpegSegmentType.APP2);
}
public void readJpegSegments(@NotNull Iterable segments, @NotNull Metadata metadata, @NotNull JpegSegmentType segmentType)
{
final int preambleLength = JPEG_SEGMENT_PREAMBLE.length();
// ICC data can be spread across multiple JPEG segments.
// We concat them together in this buffer for later processing.
byte[] buffer = null;
for (byte[] segmentBytes : segments) {
// Skip any segments that do not contain the required preamble
if (segmentBytes.length < preambleLength || !JPEG_SEGMENT_PREAMBLE.equalsIgnoreCase(new String(segmentBytes, 0, preambleLength)))
continue;
// NOTE we ignore three bytes here -- are they useful for anything?
// Grow the buffer
if (buffer == null) {
buffer = new byte[segmentBytes.length - 14];
// skip the first 14 bytes
System.arraycopy(segmentBytes, 14, buffer, 0, segmentBytes.length - 14);
} else {
byte[] newBuffer = new byte[buffer.length + segmentBytes.length - 14];
System.arraycopy(buffer, 0, newBuffer, 0, buffer.length);
System.arraycopy(segmentBytes, 14, newBuffer, buffer.length, segmentBytes.length - 14);
buffer = newBuffer;
}
}
if (buffer != null)
extract(new ByteArrayReader(buffer), metadata);
}
public void extract(@NotNull final RandomAccessReader reader, @NotNull final Metadata metadata)
{
extract(reader, metadata, null);
}
public void extract(@NotNull final RandomAccessReader reader, @NotNull final Metadata metadata, @Nullable Directory parentDirectory)
{
// TODO review whether the 'tagPtr' values below really do require RandomAccessReader or whether SequentialReader may be used instead
IccDirectory directory = new IccDirectory();
if (parentDirectory != null)
directory.setParent(parentDirectory);
try {
int profileByteCount = reader.getInt32(IccDirectory.TAG_PROFILE_BYTE_COUNT);
directory.setInt(IccDirectory.TAG_PROFILE_BYTE_COUNT, profileByteCount);
// For these tags, the int value of the tag is in fact it's offset within the buffer.
set4ByteString(directory, IccDirectory.TAG_CMM_TYPE, reader);
setInt32(directory, IccDirectory.TAG_PROFILE_VERSION, reader);
set4ByteString(directory, IccDirectory.TAG_PROFILE_CLASS, reader);
set4ByteString(directory, IccDirectory.TAG_COLOR_SPACE, reader);
set4ByteString(directory, IccDirectory.TAG_PROFILE_CONNECTION_SPACE, reader);
setDate(directory, IccDirectory.TAG_PROFILE_DATETIME, reader);
set4ByteString(directory, IccDirectory.TAG_SIGNATURE, reader);
set4ByteString(directory, IccDirectory.TAG_PLATFORM, reader);
setInt32(directory, IccDirectory.TAG_CMM_FLAGS, reader);
set4ByteString(directory, IccDirectory.TAG_DEVICE_MAKE, reader);
int temp = reader.getInt32(IccDirectory.TAG_DEVICE_MODEL);
if (temp != 0) {
if (temp <= 0x20202020) {
directory.setInt(IccDirectory.TAG_DEVICE_MODEL, temp);
} else {
directory.setString(IccDirectory.TAG_DEVICE_MODEL, getStringFromInt32(temp));
}
}
setInt32(directory, IccDirectory.TAG_RENDERING_INTENT, reader);
setInt64(directory, IccDirectory.TAG_DEVICE_ATTR, reader);
float[] xyz = new float[]{
reader.getS15Fixed16(IccDirectory.TAG_XYZ_VALUES),
reader.getS15Fixed16(IccDirectory.TAG_XYZ_VALUES + 4),
reader.getS15Fixed16(IccDirectory.TAG_XYZ_VALUES + 8)
};
directory.setObject(IccDirectory.TAG_XYZ_VALUES, xyz);
// Process 'ICC tags'
int tagCount = reader.getInt32(IccDirectory.TAG_TAG_COUNT);
directory.setInt(IccDirectory.TAG_TAG_COUNT, tagCount);
for (int i = 0; i < tagCount; i++) {
int pos = IccDirectory.TAG_TAG_COUNT + 4 + i * 12;
int tagType = reader.getInt32(pos);
int tagPtr = reader.getInt32(pos + 4);
int tagLen = reader.getInt32(pos + 8);
byte[] b = reader.getBytes(tagPtr, tagLen);
directory.setByteArray(tagType, b);
}
} catch (IOException ex) {
directory.addError("Exception reading ICC profile: " + ex.getMessage());
}
metadata.addDirectory(directory);
}
private void set4ByteString(@NotNull Directory directory, int tagType, @NotNull RandomAccessReader reader) throws IOException
{
int i = reader.getInt32(tagType);
if (i != 0)
directory.setString(tagType, getStringFromInt32(i));
}
private void setInt32(@NotNull Directory directory, int tagType, @NotNull RandomAccessReader reader) throws IOException
{
int i = reader.getInt32(tagType);
if (i != 0)
directory.setInt(tagType, i);
}
@SuppressWarnings({"SameParameterValue"})
private void setInt64(@NotNull Directory directory, int tagType, @NotNull RandomAccessReader reader) throws IOException
{
long l = reader.getInt64(tagType);
if (l != 0)
directory.setLong(tagType, l);
}
@SuppressWarnings({"SameParameterValue", "MagicConstant"})
private void setDate(@NotNull final IccDirectory directory, final int tagType, @NotNull RandomAccessReader reader) throws IOException
{
final int y = reader.getUInt16(tagType);
final int m = reader.getUInt16(tagType + 2);
final int d = reader.getUInt16(tagType + 4);
final int h = reader.getUInt16(tagType + 6);
final int M = reader.getUInt16(tagType + 8);
final int s = reader.getUInt16(tagType + 10);
if (DateUtil.isValidDate(y, m - 1, d) && DateUtil.isValidTime(h, M, s))
{
String dateString = String.format("%04d:%02d:%02d %02d:%02d:%02d", y, m, d, h, M, s);
directory.setString(tagType, dateString);
}
else
{
directory.addError(String.format(
"ICC data describes an invalid date/time: year=%d month=%d day=%d hour=%d minute=%d second=%d",
y, m, d, h, M, s));
}
}
@NotNull
public static String getStringFromInt32(int d)
{
// MSB
byte[] b = new byte[] {
(byte) ((d & 0xFF000000) >> 24),
(byte) ((d & 0x00FF0000) >> 16),
(byte) ((d & 0x0000FF00) >> 8),
(byte) ((d & 0x000000FF))
};
return new String(b);
}
}