/// <summary>
/// Returns true when the supplied stream is supported.
/// </summary>
/// <param name="stream">The stream to check.</param>
/// <returns>True when the supplied stream is supported.</returns>
public bool IsSupported(Stream stream)
{
Throw.IfNull(nameof(stream), stream);
if (!stream.CanRead || !stream.CanWrite || !stream.CanSeek)
{
return(false);
}
return(IsSupported(ImageOptimizerHelper.GetFormatInformation(stream)));
}
/// <summary>
/// Performs compression on the specified stream. With some formats the image will be decoded
/// and encoded and this will result in a small quality reduction. If the new size is not
/// smaller the stream won't be overwritten.
/// </summary>
/// <param name="stream">The stream of the image to compress.</param>
/// <returns>True when the image could be compressed otherwise false.</returns>
public bool Compress(Stream stream)
{
ImageOptimizerHelper.CheckStream(stream);
var optimizer = GetOptimizer(stream);
if (optimizer == null)
{
return(false);
}
optimizer.OptimalCompression = OptimalCompression;
return(optimizer.Compress(stream));
}
/// <summary>
/// Performs lossless compression on the specified stream. If the new stream size is not smaller
/// the stream won't be overwritten.
/// </summary>
/// <param name="stream">The stream of the image to compress.</param>
/// <returns>True when the image could be compressed otherwise false.</returns>
public bool LosslessCompress([ValidatedNotNull] Stream stream)
{
ImageOptimizerHelper.CheckStream(stream);
var optimizer = GetOptimizer(stream);
if (optimizer == null)
{
return(false);
}
optimizer.OptimalCompression = OptimalCompression;
return(optimizer.LosslessCompress(stream));
}
private IImageOptimizer GetOptimizer(Stream stream)
{
var info = ImageOptimizerHelper.GetFormatInformation(stream);
return(GetOptimizer(info));
}
private IImageOptimizer GetOptimizer(FileInfo file)
{
var info = ImageOptimizerHelper.GetFormatInformation(file);
return(GetOptimizer(info));
}
/// <summary> /// Returns true when the supplied file name is supported based on the extension of the file. /// </summary> /// <param name="fileName">The name of the file to check.</param> /// <returns>True when the supplied file name is supported based on the extension of the file.</returns> public bool IsSupported(string fileName) => IsSupported(ImageOptimizerHelper.GetFormatInformation(fileName));
/// <summary> /// Returns true when the supplied file name is supported based on the extension of the file. /// </summary> /// <param name="file">The file to check.</param> /// <returns>True when the supplied file name is supported based on the extension of the file.</returns> /// <returns>True when the image could be compressed otherwise false.</returns> public bool IsSupported(FileInfo file) => IsSupported(ImageOptimizerHelper.GetFormatInformation(file));
