public static Com.Drew.Metadata.Metadata ReadMetadata([NotNull] InputStream inputStream)
{
Iterable<PngChunk> chunks = new PngChunkReader().Extract(new Com.Drew.Lang.StreamReader(inputStream), _desiredChunkTypes);
Com.Drew.Metadata.Metadata metadata = new Com.Drew.Metadata.Metadata();
foreach (PngChunk chunk in chunks)
{
try
{
ProcessChunk(metadata, chunk);
}
catch (Exception e)
{
Sharpen.Runtime.PrintStackTrace(e, System.Console.Error);
}
}
return metadata;
}
public static Com.Drew.Metadata.Metadata ReadMetadata([NotNull] InputStream inputStream)
{
Iterable <PngChunk> chunks = new PngChunkReader().Extract(new Com.Drew.Lang.StreamReader(inputStream), _desiredChunkTypes);
Com.Drew.Metadata.Metadata metadata = new Com.Drew.Metadata.Metadata();
foreach (PngChunk chunk in chunks)
{
try
{
ProcessChunk(metadata, chunk);
}
catch (Exception e)
{
Sharpen.Runtime.PrintStackTrace(e, System.Console.Error);
}
}
return(metadata);
}
public static Com.Drew.Metadata.Metadata ReadMetadata(InputStream inputStream)
{
// TODO keep a single static hash of these
ICollection <PngChunkType> desiredChunkTypes = new HashSet <PngChunkType>();
desiredChunkTypes.Add(PngChunkType.Ihdr);
desiredChunkTypes.Add(PngChunkType.Plte);
desiredChunkTypes.Add(PngChunkType.tRNS);
desiredChunkTypes.Add(PngChunkType.cHRM);
desiredChunkTypes.Add(PngChunkType.sRGB);
desiredChunkTypes.Add(PngChunkType.gAMA);
desiredChunkTypes.Add(PngChunkType.iCCP);
desiredChunkTypes.Add(PngChunkType.bKGD);
desiredChunkTypes.Add(PngChunkType.tEXt);
desiredChunkTypes.Add(PngChunkType.iTXt);
desiredChunkTypes.Add(PngChunkType.tIME);
Iterable <PngChunk> chunks = new PngChunkReader().Extract(new Com.Drew.Lang.StreamReader(inputStream), desiredChunkTypes);
Com.Drew.Metadata.Metadata metadata = new Com.Drew.Metadata.Metadata();
IList <KeyValuePair> textPairs = new AList <KeyValuePair>();
foreach (PngChunk chunk in chunks)
{
PngChunkType chunkType = chunk.GetChunkType();
sbyte[] bytes = chunk.GetBytes();
if (chunkType.Equals(PngChunkType.Ihdr))
{
PngHeader header = new PngHeader(bytes);
PngDirectory directory = metadata.GetOrCreateDirectory <PngDirectory>();
directory.SetInt(PngDirectory.TagImageWidth, header.GetImageWidth());
directory.SetInt(PngDirectory.TagImageHeight, header.GetImageHeight());
directory.SetInt(PngDirectory.TagBitsPerSample, header.GetBitsPerSample());
directory.SetInt(PngDirectory.TagColorType, header.GetColorType().GetNumericValue());
directory.SetInt(PngDirectory.TagCompressionType, header.GetCompressionType());
directory.SetInt(PngDirectory.TagFilterMethod, header.GetFilterMethod());
directory.SetInt(PngDirectory.TagInterlaceMethod, header.GetInterlaceMethod());
}
else
{
if (chunkType.Equals(PngChunkType.Plte))
{
PngDirectory directory = metadata.GetOrCreateDirectory <PngDirectory>();
directory.SetInt(PngDirectory.TagPaletteSize, bytes.Length / 3);
}
else
{
if (chunkType.Equals(PngChunkType.tRNS))
{
PngDirectory directory = metadata.GetOrCreateDirectory <PngDirectory>();
directory.SetInt(PngDirectory.TagPaletteHasTransparency, 1);
}
else
{
if (chunkType.Equals(PngChunkType.sRGB))
{
int srgbRenderingIntent = new SequentialByteArrayReader(bytes).GetInt8();
PngDirectory directory = metadata.GetOrCreateDirectory <PngDirectory>();
directory.SetInt(PngDirectory.TagSrgbRenderingIntent, srgbRenderingIntent);
}
else
{
if (chunkType.Equals(PngChunkType.cHRM))
{
PngChromaticities chromaticities = new PngChromaticities(bytes);
PngChromaticitiesDirectory directory = metadata.GetOrCreateDirectory <PngChromaticitiesDirectory>();
directory.SetInt(PngChromaticitiesDirectory.TagWhitePointX, chromaticities.GetWhitePointX());
directory.SetInt(PngChromaticitiesDirectory.TagWhitePointX, chromaticities.GetWhitePointX());
directory.SetInt(PngChromaticitiesDirectory.TagRedX, chromaticities.GetRedX());
directory.SetInt(PngChromaticitiesDirectory.TagRedY, chromaticities.GetRedY());
directory.SetInt(PngChromaticitiesDirectory.TagGreenX, chromaticities.GetGreenX());
directory.SetInt(PngChromaticitiesDirectory.TagGreenY, chromaticities.GetGreenY());
directory.SetInt(PngChromaticitiesDirectory.TagBlueX, chromaticities.GetBlueX());
directory.SetInt(PngChromaticitiesDirectory.TagBlueY, chromaticities.GetBlueY());
}
else
{
if (chunkType.Equals(PngChunkType.gAMA))
{
int gammaInt = new SequentialByteArrayReader(bytes).GetInt32();
PngDirectory directory = metadata.GetOrCreateDirectory <PngDirectory>();
directory.SetDouble(PngDirectory.TagGamma, gammaInt / 100000.0);
}
else
{
if (chunkType.Equals(PngChunkType.iCCP))
{
SequentialReader reader = new SequentialByteArrayReader(bytes);
string profileName = reader.GetNullTerminatedString(79);
PngDirectory directory = metadata.GetOrCreateDirectory <PngDirectory>();
directory.SetString(PngDirectory.TagProfileName, profileName);
sbyte compressionMethod = reader.GetInt8();
if (compressionMethod == 0)
{
// Only compression method allowed by the spec is zero: deflate
// This assumes 1-byte-per-char, which it is by spec.
int bytesLeft = bytes.Length - profileName.Length - 2;
sbyte[] compressedProfile = reader.GetBytes(bytesLeft);
InflaterInputStream inflateStream = new InflaterInputStream(new ByteArrayInputStream(compressedProfile));
new IccReader().Extract(new RandomAccessStreamReader(inflateStream), metadata);
inflateStream.Close();
}
}
else
{
if (chunkType.Equals(PngChunkType.bKGD))
{
PngDirectory directory = metadata.GetOrCreateDirectory <PngDirectory>();
directory.SetByteArray(PngDirectory.TagBackgroundColor, bytes);
}
else
{
if (chunkType.Equals(PngChunkType.tEXt))
{
SequentialReader reader = new SequentialByteArrayReader(bytes);
string keyword = reader.GetNullTerminatedString(79);
int bytesLeft = bytes.Length - keyword.Length - 1;
string value = reader.GetNullTerminatedString(bytesLeft);
textPairs.Add(new KeyValuePair(keyword, value));
}
else
{
if (chunkType.Equals(PngChunkType.iTXt))
{
SequentialReader reader = new SequentialByteArrayReader(bytes);
string keyword = reader.GetNullTerminatedString(79);
sbyte compressionFlag = reader.GetInt8();
sbyte compressionMethod = reader.GetInt8();
string languageTag = reader.GetNullTerminatedString(bytes.Length);
string translatedKeyword = reader.GetNullTerminatedString(bytes.Length);
int bytesLeft = bytes.Length - keyword.Length - 1 - 1 - 1 - languageTag.Length - 1 - translatedKeyword.Length - 1;
string text = null;
if (compressionFlag == 0)
{
text = reader.GetNullTerminatedString(bytesLeft);
}
else
{
if (compressionFlag == 1)
{
if (compressionMethod == 0)
{
text = StringUtil.FromStream(new InflaterInputStream(new ByteArrayInputStream(bytes, bytes.Length - bytesLeft, bytesLeft)));
}
else
{
metadata.GetOrCreateDirectory <PngDirectory>().AddError("Invalid compression method value");
}
}
else
{
metadata.GetOrCreateDirectory <PngDirectory>().AddError("Invalid compression flag value");
}
}
if (text != null)
{
if (keyword.Equals("XML:com.adobe.xmp"))
{
// NOTE in testing images, the XMP has parsed successfully, but we are not extracting tags from it as necessary
new XmpReader().Extract(text, metadata);
}
else
{
textPairs.Add(new KeyValuePair(keyword, text));
}
}
}
else
{
if (chunkType.Equals(PngChunkType.tIME))
{
SequentialByteArrayReader reader = new SequentialByteArrayReader(bytes);
int year = reader.GetUInt16();
int month = reader.GetUInt8() - 1;
int day = reader.GetUInt8();
int hour = reader.GetUInt8();
int minute = reader.GetUInt8();
int second = reader.GetUInt8();
Sharpen.Calendar calendar = Sharpen.Calendar.GetInstance(Sharpen.Extensions.GetTimeZone("UTC"));
//noinspection MagicConstant
calendar.Set(year, month, day, hour, minute, second);
PngDirectory directory = metadata.GetOrCreateDirectory <PngDirectory>();
directory.SetDate(PngDirectory.TagLastModificationTime, calendar.GetTime());
}
}
}
}
}
}
}
}
}
}
}
}
if (textPairs.Count != 0)
{
PngDirectory directory = metadata.GetOrCreateDirectory <PngDirectory>();
directory.SetObject(PngDirectory.TagTextualData, textPairs);
}
return(metadata);
}
public static Com.Drew.Metadata.Metadata ReadMetadata(InputStream inputStream)
{
// TODO keep a single static hash of these
ICollection<PngChunkType> desiredChunkTypes = new HashSet<PngChunkType>();
desiredChunkTypes.Add(PngChunkType.Ihdr);
desiredChunkTypes.Add(PngChunkType.Plte);
desiredChunkTypes.Add(PngChunkType.tRNS);
desiredChunkTypes.Add(PngChunkType.cHRM);
desiredChunkTypes.Add(PngChunkType.sRGB);
desiredChunkTypes.Add(PngChunkType.gAMA);
desiredChunkTypes.Add(PngChunkType.iCCP);
desiredChunkTypes.Add(PngChunkType.bKGD);
desiredChunkTypes.Add(PngChunkType.tEXt);
desiredChunkTypes.Add(PngChunkType.iTXt);
desiredChunkTypes.Add(PngChunkType.tIME);
Iterable<PngChunk> chunks = new PngChunkReader().Extract(new Com.Drew.Lang.StreamReader(inputStream), desiredChunkTypes);
Com.Drew.Metadata.Metadata metadata = new Com.Drew.Metadata.Metadata();
IList<KeyValuePair> textPairs = new AList<KeyValuePair>();
foreach (PngChunk chunk in chunks)
{
PngChunkType chunkType = chunk.GetChunkType();
sbyte[] bytes = chunk.GetBytes();
if (chunkType.Equals(PngChunkType.Ihdr))
{
PngHeader header = new PngHeader(bytes);
PngDirectory directory = metadata.GetOrCreateDirectory<PngDirectory>();
directory.SetInt(PngDirectory.TagImageWidth, header.GetImageWidth());
directory.SetInt(PngDirectory.TagImageHeight, header.GetImageHeight());
directory.SetInt(PngDirectory.TagBitsPerSample, header.GetBitsPerSample());
directory.SetInt(PngDirectory.TagColorType, header.GetColorType().GetNumericValue());
directory.SetInt(PngDirectory.TagCompressionType, header.GetCompressionType());
directory.SetInt(PngDirectory.TagFilterMethod, header.GetFilterMethod());
directory.SetInt(PngDirectory.TagInterlaceMethod, header.GetInterlaceMethod());
}
else
{
if (chunkType.Equals(PngChunkType.Plte))
{
PngDirectory directory = metadata.GetOrCreateDirectory<PngDirectory>();
directory.SetInt(PngDirectory.TagPaletteSize, bytes.Length / 3);
}
else
{
if (chunkType.Equals(PngChunkType.tRNS))
{
PngDirectory directory = metadata.GetOrCreateDirectory<PngDirectory>();
directory.SetInt(PngDirectory.TagPaletteHasTransparency, 1);
}
else
{
if (chunkType.Equals(PngChunkType.sRGB))
{
int srgbRenderingIntent = new SequentialByteArrayReader(bytes).GetInt8();
PngDirectory directory = metadata.GetOrCreateDirectory<PngDirectory>();
directory.SetInt(PngDirectory.TagSrgbRenderingIntent, srgbRenderingIntent);
}
else
{
if (chunkType.Equals(PngChunkType.cHRM))
{
PngChromaticities chromaticities = new PngChromaticities(bytes);
PngChromaticitiesDirectory directory = metadata.GetOrCreateDirectory<PngChromaticitiesDirectory>();
directory.SetInt(PngChromaticitiesDirectory.TagWhitePointX, chromaticities.GetWhitePointX());
directory.SetInt(PngChromaticitiesDirectory.TagWhitePointX, chromaticities.GetWhitePointX());
directory.SetInt(PngChromaticitiesDirectory.TagRedX, chromaticities.GetRedX());
directory.SetInt(PngChromaticitiesDirectory.TagRedY, chromaticities.GetRedY());
directory.SetInt(PngChromaticitiesDirectory.TagGreenX, chromaticities.GetGreenX());
directory.SetInt(PngChromaticitiesDirectory.TagGreenY, chromaticities.GetGreenY());
directory.SetInt(PngChromaticitiesDirectory.TagBlueX, chromaticities.GetBlueX());
directory.SetInt(PngChromaticitiesDirectory.TagBlueY, chromaticities.GetBlueY());
}
else
{
if (chunkType.Equals(PngChunkType.gAMA))
{
int gammaInt = new SequentialByteArrayReader(bytes).GetInt32();
PngDirectory directory = metadata.GetOrCreateDirectory<PngDirectory>();
directory.SetDouble(PngDirectory.TagGamma, gammaInt / 100000.0);
}
else
{
if (chunkType.Equals(PngChunkType.iCCP))
{
SequentialReader reader = new SequentialByteArrayReader(bytes);
string profileName = reader.GetNullTerminatedString(79);
PngDirectory directory = metadata.GetOrCreateDirectory<PngDirectory>();
directory.SetString(PngDirectory.TagProfileName, profileName);
sbyte compressionMethod = reader.GetInt8();
if (compressionMethod == 0)
{
// Only compression method allowed by the spec is zero: deflate
// This assumes 1-byte-per-char, which it is by spec.
int bytesLeft = bytes.Length - profileName.Length - 2;
sbyte[] compressedProfile = reader.GetBytes(bytesLeft);
InflaterInputStream inflateStream = new InflaterInputStream(new ByteArrayInputStream(compressedProfile));
new IccReader().Extract(new RandomAccessStreamReader(inflateStream), metadata);
inflateStream.Close();
}
}
else
{
if (chunkType.Equals(PngChunkType.bKGD))
{
PngDirectory directory = metadata.GetOrCreateDirectory<PngDirectory>();
directory.SetByteArray(PngDirectory.TagBackgroundColor, bytes);
}
else
{
if (chunkType.Equals(PngChunkType.tEXt))
{
SequentialReader reader = new SequentialByteArrayReader(bytes);
string keyword = reader.GetNullTerminatedString(79);
int bytesLeft = bytes.Length - keyword.Length - 1;
string value = reader.GetNullTerminatedString(bytesLeft);
textPairs.Add(new KeyValuePair(keyword, value));
}
else
{
if (chunkType.Equals(PngChunkType.iTXt))
{
SequentialReader reader = new SequentialByteArrayReader(bytes);
string keyword = reader.GetNullTerminatedString(79);
sbyte compressionFlag = reader.GetInt8();
sbyte compressionMethod = reader.GetInt8();
string languageTag = reader.GetNullTerminatedString(bytes.Length);
string translatedKeyword = reader.GetNullTerminatedString(bytes.Length);
int bytesLeft = bytes.Length - keyword.Length - 1 - 1 - 1 - languageTag.Length - 1 - translatedKeyword.Length - 1;
string text = null;
if (compressionFlag == 0)
{
text = reader.GetNullTerminatedString(bytesLeft);
}
else
{
if (compressionFlag == 1)
{
if (compressionMethod == 0)
{
text = StringUtil.FromStream(new InflaterInputStream(new ByteArrayInputStream(bytes, bytes.Length - bytesLeft, bytesLeft)));
}
else
{
metadata.GetOrCreateDirectory<PngDirectory>().AddError("Invalid compression method value");
}
}
else
{
metadata.GetOrCreateDirectory<PngDirectory>().AddError("Invalid compression flag value");
}
}
if (text != null)
{
if (keyword.Equals("XML:com.adobe.xmp"))
{
// NOTE in testing images, the XMP has parsed successfully, but we are not extracting tags from it as necessary
new XmpReader().Extract(text, metadata);
}
else
{
textPairs.Add(new KeyValuePair(keyword, text));
}
}
}
else
{
if (chunkType.Equals(PngChunkType.tIME))
{
SequentialByteArrayReader reader = new SequentialByteArrayReader(bytes);
int year = reader.GetUInt16();
int month = reader.GetUInt8() - 1;
int day = reader.GetUInt8();
int hour = reader.GetUInt8();
int minute = reader.GetUInt8();
int second = reader.GetUInt8();
Sharpen.Calendar calendar = Sharpen.Calendar.GetInstance(Sharpen.Extensions.GetTimeZone("UTC"));
//noinspection MagicConstant
calendar.Set(year, month, day, hour, minute, second);
PngDirectory directory = metadata.GetOrCreateDirectory<PngDirectory>();
directory.SetDate(PngDirectory.TagLastModificationTime, calendar.GetTime());
}
}
}
}
}
}
}
}
}
}
}
}
if (textPairs.Count != 0)
{
PngDirectory directory = metadata.GetOrCreateDirectory<PngDirectory>();
directory.SetObject(PngDirectory.TagTextualData, textPairs);
}
return metadata;
}
