/// <summary>
/// Creates a new collection of <see cref="HeifImage"/> from the specified data.
/// </summary>
/// <param name="input">The data to load the image from.</param>
/// <returns>A new <see cref="HeifImage"/> instance.</returns>
public static IHeifImageCollection DecodeCollection(byte[] input)
{
var result = new HeifImageCollection();
HeifImageHandle?handle = null;
try
{
using (var context = new HeifContext(input))
{
foreach (var imageId in context.GetImageIds())
{
handle = new HeifImageHandle(context, imageId);
result.Add(new HeifImage(context, handle));
}
}
}
catch
{
foreach (var image in result)
{
image.Dispose();
}
handle?.Dispose();
throw;
}
return(result);
}
private HeifImage(HeifContext context, HeifImageHandle handle)
{
this.context = context;
this.handle = handle;
this.nativeInstance = new NativeHeifImage(handle);
this.Metadata = new HeifMetadata(this.nativeInstance.Width, this.nativeInstance.Height);
}
internal static IntPtr GetInstance(HeifContext context)
{
if (context == null)
{
return(IntPtr.Zero);
}
return(context.nativeInstance.Instance);
}
/// <summary>
/// Creates a new <see cref="HeifMetadata"/> from the specified data.
/// </summary>
/// <param name="input">The data to load the metadata from.</param>
/// <returns>A new <see cref="HeifMetadata"/>.</returns>
public static HeifMetadata GetMetadata(byte[] input)
{
using (var context = new HeifContext(input))
{
using (var handle = new HeifImageHandle(context))
{
return(handle.ToMetadata());
}
}
}
public NativeHeifImageHandle(HeifContext context, uint imageId)
{
var instance = NativeMethods.HeifImageHandle_CreateById(HeifContext.GetInstance(context), imageId);
if (instance == IntPtr.Zero)
{
throw new HeifException("Unable to load heif image handle.");
}
this.Instance = instance;
}
/// <summary>
/// Creates a new collection of <see cref="HeifMetadata"/> from the specified data.
/// </summary>
/// <param name="input">The data to load the metadata from.</param>
/// <returns>A new <see cref="HeifMetadata"/>.</returns>
public static IReadOnlyCollection <HeifMetadata> GetCollectionMetadata(byte[] input)
{
using (var context = new HeifContext(input))
{
var result = new List <HeifMetadata>();
foreach (var imageId in context.GetImageIds())
{
using (var handle = new HeifImageHandle(context, imageId))
{
result.Add(handle.ToMetadata());
}
}
return(result);
}
}
/// <summary>
/// Creates a new <see cref="HeifImage"/> from the specified data.
/// </summary>
/// <param name="input">The data to load the image from.</param>
/// <returns>A new <see cref="HeifImage"/> instance.</returns>
public static HeifImage Decode(byte[] input)
{
HeifContext? context = null;
HeifImageHandle?handle = null;
try
{
context = new HeifContext(input);
handle = new HeifImageHandle(context);
return(new HeifImage(context, handle));
}
catch
{
handle?.Dispose();
context?.Dispose();
throw;
}
}
public HeifImageHandle(HeifContext context)
{
this.nativeInstance = new NativeHeifImageHandle(context);
}
public HeifImageHandle(HeifContext context, uint imageId)
{
this.nativeInstance = new NativeHeifImageHandle(context, imageId);
context.AddReference();
}
