private static void AddAvifMetadataToDocument(Document doc, AvifReader reader, IByteArrayPool arrayPool)
{
byte[] exifBytes = reader.GetExifData();
if (exifBytes != null)
{
ExifValueCollection exifValues = ExifParser.Parse(exifBytes, arrayPool);
if (exifValues != null)
{
exifValues.Remove(MetadataKeys.Image.InterColorProfile);
// The HEIF specification states that the EXIF orientation tag is only
// informational and should not be used to rotate the image.
// See https://github.com/strukturag/libheif/issues/227#issuecomment-642165942
exifValues.Remove(MetadataKeys.Image.Orientation);
foreach (MetadataEntry entry in exifValues)
{
doc.Metadata.AddExifPropertyItem(entry.CreateExifPropertyItem());
}
}
}
CICPColorData?imageColorData = reader.ImageColorData;
if (imageColorData.HasValue)
{
string serializedValue = CICPSerializer.TrySerialize(imageColorData.Value);
if (serializedValue != null)
{
doc.Metadata.SetUserValue(CICPMetadataName, serializedValue);
}
}
ImageGridMetadata imageGridMetadata = reader.ImageGridMetadata;
if (imageGridMetadata != null)
{
string serializedValue = imageGridMetadata.SerializeToString();
if (serializedValue != null)
{
doc.Metadata.SetUserValue(ImageGridName, serializedValue);
}
}
byte[] iccProfileBytes = reader.GetICCProfile();
if (iccProfileBytes != null)
{
doc.Metadata.AddExifPropertyItem(ExifSection.Image,
unchecked ((ushort)ExifTagID.IccProfileData),
new ExifValue(ExifValueType.Undefined,
iccProfileBytes));
}
byte[] xmpBytes = reader.GetXmpData();
if (xmpBytes != null)
{
XmpPacket xmpPacket = XmpPacket.TryParse(xmpBytes);
if (xmpPacket != null)
{
doc.Metadata.SetXmpPacket(xmpPacket);
}
}
}
protected override Document OnLoad(Stream input)
{
byte[] bytes = new byte[input.Length];
input.ProperRead(bytes, 0, (int)input.Length);
Surface surface = GetOrientedSurface(bytes, out ExifValueCollection exifMetadata);
bool disposeSurface = true;
Document doc = null;
try
{
doc = new Document(surface.Width, surface.Height);
byte[] colorProfileBytes = WebPFile.GetColorProfileBytes(bytes);
if (colorProfileBytes != null)
{
doc.Metadata.AddExifPropertyItem(ExifSection.Image,
unchecked ((ushort)ExifTagID.IccProfileData),
new ExifValue(ExifValueType.Undefined,
colorProfileBytes));
}
if (exifMetadata != null && exifMetadata.Count > 0)
{
ExifValue xResProperty = exifMetadata.GetAndRemoveValue(ExifPropertyKeys.Image.XResolution.Path);
ExifValue yResProperty = exifMetadata.GetAndRemoveValue(ExifPropertyKeys.Image.YResolution.Path);
ExifValue resUnitProperty = exifMetadata.GetAndRemoveValue(ExifPropertyKeys.Image.ResolutionUnit.Path);
if (xResProperty != null && yResProperty != null && resUnitProperty != null)
{
if (MetadataHelpers.TryDecodeRational(xResProperty, out double xRes) &&
MetadataHelpers.TryDecodeRational(yResProperty, out double yRes) &&
MetadataHelpers.TryDecodeShort(resUnitProperty, out ushort resUnit))
{
if (xRes > 0.0 && yRes > 0.0)
{
switch (resUnit)
{
case TiffConstants.ResolutionUnit.Centimeter:
doc.DpuUnit = MeasurementUnit.Centimeter;
doc.DpuX = xRes;
doc.DpuY = yRes;
break;
case TiffConstants.ResolutionUnit.Inch:
doc.DpuUnit = MeasurementUnit.Inch;
doc.DpuX = xRes;
doc.DpuY = yRes;
break;
}
}
}
}
foreach (KeyValuePair <ExifPropertyPath, ExifValue> item in exifMetadata)
{
ExifPropertyPath path = item.Key;
doc.Metadata.AddExifPropertyItem(path.Section, path.TagID, item.Value);
}
}
byte[] xmpBytes = WebPFile.GetXmpBytes(bytes);
if (xmpBytes != null)
{
XmpPacket xmpPacket = XmpPacket.TryParse(xmpBytes);
if (xmpPacket != null)
{
doc.Metadata.SetXmpPacket(xmpPacket);
}
}
doc.Layers.Add(Layer.CreateBackgroundLayer(surface, takeOwnership: true));
disposeSurface = false;
}
finally
{
if (disposeSurface)
{
surface?.Dispose();
}
}
return(doc);
}