public static extern WebPEncodingError WebPSave(
WebPWriteImage writeImageCallback,
IntPtr scan0,
int width,
int height,
int stride,
EncodeParams parameters,
[MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef = typeof(MetadataCustomMarshaler))]
MetadataParams metadata,
WebPReportProgress callback);
/// <summary>
/// The WebP save function.
/// </summary>
/// <param name="writeImageCallback">The callback used to write the WebP image.</param>
/// <param name="input">The input surface.</param>
/// <param name="parameters">The encode parameters.</param>
/// <param name="metadata">The image metadata.</param>
/// <param name="callback">The progress callback.</param>
/// <exception cref="ArgumentNullException"><paramref name="writeImageCallback"/> is null.
/// or
/// <paramref name="input"/> is null.</exception>
/// <exception cref="OutOfMemoryException">Insufficient memory to save the image.</exception>
/// <exception cref="WebPException">The encoder returned a non-memory related error.</exception>
internal static void WebPSave(
Surface input,
Stream output,
EncodeParams parameters,
MetadataParams metadata,
WebPReportProgress callback)
{
if (input == null)
{
throw new ArgumentNullException(nameof(input));
}
StreamIOHandler handler = new StreamIOHandler(output);
WebPWriteImage writeImageCallback = handler.WriteImageCallback;
WebPEncodingError retVal = WebPEncodingError.Ok;
if (IntPtr.Size == 8)
{
retVal = WebP_64.WebPSave(writeImageCallback, input.Scan0.Pointer, input.Width, input.Height, input.Stride, parameters, metadata, callback);
}
else
{
retVal = WebP_32.WebPSave(writeImageCallback, input.Scan0.Pointer, input.Width, input.Height, input.Stride, parameters, metadata, callback);
}
GC.KeepAlive(writeImageCallback);
if (retVal != WebPEncodingError.Ok)
{
switch (retVal)
{
case WebPEncodingError.OutOfMemory:
case WebPEncodingError.BitStreamOutOfMemory:
throw new OutOfMemoryException(Resources.InsufficientMemoryOnSave);
case WebPEncodingError.FileTooBig:
throw new WebPException(Resources.EncoderFileTooBig);
case WebPEncodingError.ApiVersionMismatch:
throw new WebPException(Resources.ApiVersionMismatch);
case WebPEncodingError.MetadataEncoding:
throw new WebPException(Resources.EncoderMetadataError);
case WebPEncodingError.UserAbort:
throw new OperationCanceledException();
case WebPEncodingError.BadDimension:
throw new WebPException(Resources.InvalidImageDimensions);
case WebPEncodingError.NullParameter:
throw new WebPException(Resources.EncoderNullParameter);
case WebPEncodingError.InvalidConfiguration:
throw new WebPException(Resources.EncoderInvalidConfiguration);
case WebPEncodingError.PartitionZeroOverflow:
throw new WebPException(Resources.EncoderPartitionZeroOverflow);
case WebPEncodingError.PartitionOverflow:
throw new WebPException(Resources.EncoderPartitionOverflow);
case WebPEncodingError.BadWrite:
if (handler.WriteException != null)
{
throw new IOException(Resources.EncoderBadWrite, handler.WriteException);
}
else
{
throw new IOException(Resources.EncoderBadWrite);
}
default:
throw new WebPException(Resources.EncoderGenericError);
}
}
}
