/// <summary>
/// Resizes an image to the given width and height with the given sampler and
/// source rectangle.
/// </summary>
/// <typeparam name="TColor">The pixel format.</typeparam>
/// <typeparam name="TPacked">The packed format. <example>uint, long, float.</example></typeparam>
/// <param name="source">The image to resize.</param>
/// <param name="width">The target image width.</param>
/// <param name="height">The target image height.</param>
/// <param name="sampler">The <see cref="IResampler"/> to perform the resampling.</param>
/// <param name="sourceRectangle">
/// The <see cref="Rectangle"/> structure that specifies the portion of the image object to draw.
/// </param>
/// <param name="targetRectangle">
/// The <see cref="Rectangle"/> structure that specifies the portion of the target image object to draw to.
/// </param>
/// <param name="compand">Whether to compress and expand the image color-space to gamma correct the image during processing.</param>
/// <returns>The <see cref="Image{TColor, TPacked}"/></returns>
/// <remarks>Passing zero for one of height or width will automatically preserve the aspect ratio of the original image</remarks>
public static Image <TColor, TPacked> Resize <TColor, TPacked>(this Image <TColor, TPacked> source, int width, int height, IResampler sampler, Rectangle sourceRectangle, Rectangle targetRectangle, bool compand = false)
where TColor : struct, IPackedPixel <TPacked>
where TPacked : struct, IEquatable <TPacked>
{
if (width == 0 && height > 0)
{
width = source.Width * height / source.Height;
targetRectangle.Width = width;
}
if (height == 0 && width > 0)
{
height = source.Height * width / source.Width;
targetRectangle.Height = height;
}
Guard.MustBeGreaterThan(width, 0, nameof(width));
Guard.MustBeGreaterThan(height, 0, nameof(height));
ResamplingWeightedProcessor <TColor, TPacked> processor;
if (compand)
{
processor = new CompandingResizeProcessor <TColor, TPacked>(sampler, width, height, targetRectangle);
}
else
{
processor = new ResizeProcessor <TColor, TPacked>(sampler, width, height, targetRectangle);
}
return(source.Process(sourceRectangle, processor));
}
/// <summary>
/// Resizes an image to the given width and height with the given sampler and
/// source rectangle.
/// </summary>
/// <typeparam name="T">The pixel format.</typeparam>
/// <typeparam name="TP">The packed format. <example>long, float.</example></typeparam>
/// <param name="source">The image to resize.</param>
/// <param name="width">The target image width.</param>
/// <param name="height">The target image height.</param>
/// <param name="sampler">The <see cref="IResampler"/> to perform the resampling.</param>
/// <param name="sourceRectangle">
/// The <see cref="Rectangle"/> structure that specifies the portion of the image object to draw.
/// </param>
/// <param name="targetRectangle">
/// The <see cref="Rectangle"/> structure that specifies the portion of the target image object to draw to.
/// </param>
/// <param name="compand">Whether to compress and expand the image color-space to gamma correct the image during processing.</param>
/// <param name="progressHandler">A delegate which is called as progress is made processing the image.</param>
/// <returns>The <see cref="Image{T,TP}"/></returns>
/// <remarks>Passing zero for one of height or width will automatically preserve the aspect ratio of the original image</remarks>
public static Image <T, TP> Resize <T, TP>(this Image <T, TP> source, int width, int height, IResampler sampler, Rectangle sourceRectangle, Rectangle targetRectangle, bool compand = false, ProgressEventHandler progressHandler = null)
where T : IPackedVector <TP>
where TP : struct
{
if (width == 0 && height > 0)
{
width = source.Width * height / source.Height;
targetRectangle.Width = width;
}
if (height == 0 && width > 0)
{
height = source.Height * width / source.Width;
targetRectangle.Height = height;
}
Guard.MustBeGreaterThan(width, 0, nameof(width));
Guard.MustBeGreaterThan(height, 0, nameof(height));
ResamplingWeightedProcessor <T, TP> processor;
if (compand)
{
processor = new CompandingResizeProcessor <T, TP>(sampler);
}
else
{
processor = new ResizeProcessor <T, TP>(sampler);
}
processor.OnProgress += progressHandler;
try
{
return(source.Process(width, height, sourceRectangle, targetRectangle, processor));
}
finally
{
processor.OnProgress -= progressHandler;
}
}
