public static Document Load(Stream input, IByteArrayPool arrayPool)
{
Document doc = null;
using (AvifReader reader = new AvifReader(input, leaveOpen: true, arrayPool))
{
Surface surface = null;
bool disposeSurface = true;
try
{
surface = reader.Decode();
doc = new Document(surface.Width, surface.Height);
AddAvifMetadataToDocument(doc, reader, arrayPool);
doc.Layers.Add(Layer.CreateBackgroundLayer(surface, takeOwnership: true));
disposeSurface = false;
}
finally
{
if (disposeSurface)
{
surface?.Dispose();
}
}
}
return(doc);
}
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);
}
}
}
