private void CheckImageItemType(uint itemId, ImageGridInfo gridInfo, string imageName, bool checkingGridChildren = false)
{
IItemInfoEntry entry = this.parser.TryGetItemInfoEntry(itemId);
if (entry is null)
{
ExceptionUtil.ThrowFormatException($"The { imageName } image does not exist.");
}
else if (entry.ItemType != ItemInfoEntryTypes.AV01)
{
if (entry.ItemType == ItemInfoEntryTypes.ImageGrid)
{
if (checkingGridChildren)
{
ExceptionUtil.ThrowFormatException("Nested image grids are not supported.");
}
if (gridInfo is null)
{
ExceptionUtil.ThrowFormatException($"The { imageName } image does not have any image grid information.");
}
IReadOnlyList <uint> childImageIds = gridInfo.ChildImageIds;
for (int i = 0; i < childImageIds.Count; i++)
{
CheckImageItemType(childImageIds[i], null, imageName, true);
}
}
else
{
ExceptionUtil.ThrowFormatException($"The { imageName } image is not a supported format.");
}
}
}
private void EnsurePrimaryItemIsNotHidden()
{
IItemInfoEntry entry = this.parser.TryGetItemInfoEntry(this.primaryItemId);
if (entry is null)
{
ExceptionUtil.ThrowFormatException("The primary item does not exist.");
}
else if (entry.IsHidden)
{
ExceptionUtil.ThrowFormatException("The primary item cannot be marked as hidden.");
}
}
public ItemLocationEntry TryGetExifLocation(uint itemId)
{
foreach (IItemReferenceEntry item in GetMatchingReferences(itemId, ReferenceTypes.ContentDescription))
{
IItemInfoEntry entry = TryGetItemInfoEntry(item.FromItemId);
if (entry != null && entry.ItemType == ItemInfoEntryTypes.Exif)
{
return(TryGetItemLocation(item.FromItemId));
}
}
return(null);
}
private void CheckRequiredImageProperties(uint itemId, ImageGridInfo gridInfo, string imageName)
{
bool hasUnsupportedProperties = false;
IItemInfoEntry entry = this.parser.TryGetItemInfoEntry(itemId);
if (entry is null)
{
ExceptionUtil.ThrowFormatException($"The { imageName } image does not exist.");
}
else if (entry.ItemType == ItemInfoEntryTypes.AV01)
{
hasUnsupportedProperties = this.parser.HasUnsupportedEssentialProperties(itemId);
}
else if (entry.ItemType == ItemInfoEntryTypes.ImageGrid)
{
if (gridInfo is null)
{
ExceptionUtil.ThrowFormatException($"The { imageName } image does not have any image grid information.");
}
IReadOnlyList <uint> childImageIds = gridInfo.ChildImageIds;
for (int i = 0; i < childImageIds.Count; i++)
{
if (this.parser.HasUnsupportedEssentialProperties(childImageIds[i]))
{
hasUnsupportedProperties = true;
break;
}
}
}
else
{
ExceptionUtil.ThrowFormatException($"The { imageName } image is not a supported format.");
}
if (hasUnsupportedProperties)
{
ExceptionUtil.ThrowFormatException($"The { imageName } image has essential item properties that are not supported.");
}
}
public ItemLocationEntry TryGetXmpLocation(uint itemId)
{
foreach (IItemReferenceEntry item in GetMatchingReferences(itemId, ReferenceTypes.ContentDescription))
{
IItemInfoEntry entry = TryGetItemInfoEntry(item.FromItemId);
if (entry != null && entry.ItemType == ItemInfoEntryTypes.Mime)
{
MimeItemInfoEntryBox mimeItemInfo = (MimeItemInfoEntryBox)entry;
string contentType = mimeItemInfo.ContentType.Value;
if (string.Equals(contentType, XmpItemInfoEntry.XmpContentType, StringComparison.Ordinal))
{
return(TryGetItemLocation(item.FromItemId));
}
}
}
return(null);
}
private Size GetImageSize(uint itemId, ImageGridInfo gridInfo, string imageName)
{
IItemInfoEntry entry = this.parser.TryGetItemInfoEntry(itemId);
uint width;
uint height;
if (entry.ItemType == ItemInfoEntryTypes.AV01)
{
ImageSpatialExtentsBox extents = this.parser.TryGetAssociatedItemProperty <ImageSpatialExtentsBox>(itemId);
if (extents is null)
{
ExceptionUtil.ThrowFormatException($"The { imageName } image size property was not found.");
}
width = extents.ImageWidth;
height = extents.ImageHeight;
}
else if (entry.ItemType == ItemInfoEntryTypes.ImageGrid)
{
if (gridInfo is null)
{
ExceptionUtil.ThrowFormatException($"The { imageName } image does not have any image grid information.");
}
width = gridInfo.OutputWidth;
height = gridInfo.OutputHeight;
}
else
{
throw new FormatException($"The { imageName } image is not a supported format.");
}
if (width > int.MaxValue || height > int.MaxValue)
{
throw new FormatException($"The { imageName } image dimensions are too large.");
}
return(new Size((int)width, (int)height));
}
private ImageGridDescriptor TryGetImageGridDescriptor(uint itemId)
{
IItemInfoEntry entry = TryGetItemInfoEntry(itemId);
if (entry != null && entry.ItemType == ItemInfoEntryTypes.ImageGrid)
{
ItemLocationEntry locationEntry = TryGetItemLocation(itemId);
if (locationEntry != null)
{
if (locationEntry.TotalItemSize < ImageGridDescriptor.SmallDescriptorLength)
{
ExceptionUtil.ThrowFormatException("Invalid image grid descriptor length.");
}
using (AvifItemData itemData = ReadItemData(locationEntry))
{
Stream stream = null;
try
{
stream = itemData.GetStream();
using (EndianBinaryReader imageGridReader = new EndianBinaryReader(stream, this.reader.Endianess, this.arrayPool))
{
stream = null;
return(new ImageGridDescriptor(imageGridReader, itemData.Length));
}
}
finally
{
stream?.Dispose();
}
}
}
}
return(null);
}