internal static unsafe void ExtractMetadata(byte[] data, MetadataType type, byte[] outData, uint outSize)
{
fixed(byte *ptr = data, outPtr = outData)
{
if (IntPtr.Size == 8)
{
WebP_64.ExtractMetadata(ptr, new UIntPtr((ulong)data.Length), outPtr, outSize, type);
}
else
{
WebP_32.ExtractMetadata(ptr, new UIntPtr((ulong)data.Length), outPtr, outSize, type);
}
}
}
/// <summary>
/// Gets the dimension of the WebP image.
/// </summary>
/// <param name="data">The input image data.</param>
/// <param name="width">The output width of the image.</param>
/// <param name="height">The output height of the image.</param>
/// <returns>true on success, otherwise false.</returns>
internal static unsafe bool WebPGetDimensions(byte[] data, out int width, out int height)
{
fixed(byte *ptr = data)
{
if (IntPtr.Size == 8)
{
return(WebP_64.WebPGetDimensions(ptr, new UIntPtr((ulong)data.Length), out width, out height));
}
else
{
return(WebP_32.WebPGetDimensions(ptr, new UIntPtr((ulong)data.Length), out width, out height));
}
}
}
internal static unsafe uint GetMetadataSize(byte[] data, MetadataType type)
{
uint metadataSize;
fixed(byte *ptr = data)
{
if (IntPtr.Size == 8)
{
metadataSize = WebP_64.GetMetadataSize(ptr, new UIntPtr((ulong)data.Length), type);
}
else
{
metadataSize = WebP_32.GetMetadataSize(ptr, new UIntPtr((ulong)data.Length), type);
}
}
return(metadataSize);
}
/// <summary>
/// The WebP load function.
/// </summary>
/// <param name="webpBytes">The input image data</param>
/// <exception cref="OutOfMemoryException">Insufficient memory to load the WebP image.</exception>
/// <exception cref="WebPException">
/// The WebP image is invalid.
/// -or-
/// A native API parameter is invalid.
/// </exception>
internal static unsafe void WebPLoad(byte[] webpBytes, System.Drawing.Imaging.BitmapData output)
{
VP8StatusCode status;
fixed(byte *ptr = webpBytes)
{
int stride = output.Stride;
ulong outputSize = (ulong)stride * (ulong)output.Height;
if (IntPtr.Size == 8)
{
status = WebP_64.WebPLoad(ptr, new UIntPtr((ulong)webpBytes.Length), (byte *)output.Scan0, new UIntPtr(outputSize), stride);
}
else
{
status = WebP_32.WebPLoad(ptr, new UIntPtr((ulong)webpBytes.Length), (byte *)output.Scan0, new UIntPtr(outputSize), stride);
}
}
if (status != VP8StatusCode.Ok)
{
switch (status)
{
case VP8StatusCode.OutOfMemory:
throw new OutOfMemoryException();
case VP8StatusCode.InvalidParam:
throw new WebPException(string.Format(CultureInfo.InvariantCulture, Resources.InvalidParameterFormat, nameof(WebPLoad)));
case VP8StatusCode.UnsupportedFeature:
throw new WebPException(Resources.UnsupportedWebPFeature);
case VP8StatusCode.BitStreamError:
case VP8StatusCode.NotEnoughData:
default:
throw new WebPException(Resources.InvalidWebPImage);
}
}
}
/// <summary>
/// Gets the WebP image information.
/// </summary>
/// <param name="data">The input image data.</param>
/// <param name="info">The output image information.</param>
/// <exception cref="OutOfMemoryException">Insufficient memory to load the WebP image.</exception>
/// <exception cref="WebPException">
/// The WebP image is invalid.
/// -or-
/// A native API parameter is invalid.
/// </exception>
internal static unsafe void WebPGetImageInfo(byte[] data, out ImageInfo info)
{
VP8StatusCode status;
fixed(byte *ptr = data)
{
if (IntPtr.Size == 8)
{
status = WebP_64.WebPGetImageInfo(ptr, new UIntPtr((ulong)data.Length), out info);
}
else
{
status = WebP_32.WebPGetImageInfo(ptr, new UIntPtr((ulong)data.Length), out info);
}
}
if (status != VP8StatusCode.Ok)
{
switch (status)
{
case VP8StatusCode.OutOfMemory:
throw new OutOfMemoryException();
case VP8StatusCode.InvalidParam:
throw new WebPException(string.Format(CultureInfo.InvariantCulture, Resources.InvalidParameterFormat, nameof(WebPGetImageInfo)));
case VP8StatusCode.UnsupportedFeature:
throw new WebPException(Resources.UnsupportedWebPFeature);
case VP8StatusCode.BitStreamError:
case VP8StatusCode.NotEnoughData:
default:
throw new WebPException(Resources.InvalidWebPImage);
}
}
}
/// <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);
}
}
}
