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using System.Globalization;
namespace MediaBrowser.Model.Drawing
{
/// <summary>
/// Class DrawingUtils
/// </summary>
public static class DrawingUtils
{
/// <summary>
/// Resizes a set of dimensions
/// </summary>
/// <param name="currentWidth">Width of the current.</param>
/// <param name="currentHeight">Height of the current.</param>
/// <param name="scaleFactor">The scale factor.</param>
/// <returns>ImageSize.</returns>
public static ImageSize Scale(double currentWidth, double currentHeight, double scaleFactor)
{
return Scale(new ImageSize { Width = currentWidth, Height = currentHeight }, scaleFactor);
}
/// <summary>
/// Resizes a set of dimensions
/// </summary>
/// <param name="size">The size.</param>
/// <param name="scaleFactor">The scale factor.</param>
/// <returns>ImageSize.</returns>
public static ImageSize Scale(ImageSize size, double scaleFactor)
{
var newWidth = size.Width * scaleFactor;
return Resize(size.Width, size.Height, newWidth);
}
/// <summary>
/// Resizes a set of dimensions
/// </summary>
/// <param name="currentWidth">Width of the current.</param>
/// <param name="currentHeight">Height of the current.</param>
/// <param name="width">The width.</param>
/// <param name="height">The height.</param>
/// <param name="maxWidth">A max fixed width, if desired</param>
/// <param name="maxHeight">A max fixed height, if desired</param>
/// <returns>ImageSize.</returns>
public static ImageSize Resize(double currentWidth, double currentHeight, double? width = null, double? height = null, double? maxWidth = null, double? maxHeight = null)
{
return Resize(new ImageSize { Width = currentWidth, Height = currentHeight }, width, height, maxWidth, maxHeight);
}
/// <summary>
/// Resizes a set of dimensions
/// </summary>
/// <param name="size">The original size object</param>
/// <param name="width">A new fixed width, if desired</param>
/// <param name="height">A new fixed height, if desired</param>
/// <param name="maxWidth">A max fixed width, if desired</param>
/// <param name="maxHeight">A max fixed height, if desired</param>
/// <returns>A new size object</returns>
public static ImageSize Resize(ImageSize size, double? width = null, double? height = null, double? maxWidth = null, double? maxHeight = null)
{
double newWidth = size.Width;
double newHeight = size.Height;
if (width.HasValue && height.HasValue)
{
newWidth = width.Value;
newHeight = height.Value;
}
else if (height.HasValue)
{
newWidth = GetNewWidth(newHeight, newWidth, height.Value);
newHeight = height.Value;
}
else if (width.HasValue)
{
newHeight = GetNewHeight(newHeight, newWidth, width.Value);
newWidth = width.Value;
}
if (maxHeight.HasValue && maxHeight < newHeight)
{
newWidth = GetNewWidth(newHeight, newWidth, maxHeight.Value);
newHeight = maxHeight.Value;
}
if (maxWidth.HasValue && maxWidth < newWidth)
{
newHeight = GetNewHeight(newHeight, newWidth, maxWidth.Value);
newWidth = maxWidth.Value;
}
return new ImageSize { Width = newWidth, Height = newHeight };
}
/// <summary>
/// Gets the new width.
/// </summary>
/// <param name="currentHeight">Height of the current.</param>
/// <param name="currentWidth">Width of the current.</param>
/// <param name="newHeight">The new height.</param>
/// <returns>System.Double.</returns>
private static double GetNewWidth(double currentHeight, double currentWidth, double newHeight)
{
var scaleFactor = newHeight;
scaleFactor /= currentHeight;
scaleFactor *= currentWidth;
return scaleFactor;
}
/// <summary>
/// Gets the new height.
/// </summary>
/// <param name="currentHeight">Height of the current.</param>
/// <param name="currentWidth">Width of the current.</param>
/// <param name="newWidth">The new width.</param>
/// <returns>System.Double.</returns>
private static double GetNewHeight(double currentHeight, double currentWidth, double newWidth)
{
var scaleFactor = newWidth;
scaleFactor /= currentWidth;
scaleFactor *= currentHeight;
return scaleFactor;
}
}
/// <summary>
/// Struct ImageSize
/// </summary>
public struct ImageSize
{
private static readonly CultureInfo UsCulture = new CultureInfo("en-US");
private double _height;
private double _width;
/// <summary>
/// Gets or sets the height.
/// </summary>
/// <value>The height.</value>
public double Height
{
get
{
return _height;
}
set
{
_height = value;
}
}
/// <summary>
/// Gets or sets the width.
/// </summary>
/// <value>The width.</value>
public double Width
{
get { return _width; }
set { _width = value; }
}
public bool Equals(ImageSize size)
{
return Width.Equals(size.Width) && Height.Equals(size.Height);
}
public override string ToString()
{
return string.Format("{0}-{1}", Width, Height);
}
public ImageSize(string value)
{
_width = 0;
_height = 0;
ParseValue(value);
}
private void ParseValue(string value)
{
if (!string.IsNullOrEmpty(value))
{
var parts = value.Split('-');
if (parts.Length == 2)
{
double val;
if (double.TryParse(parts[0], NumberStyles.Any, UsCulture, out val))
{
_width = val;
}
if (double.TryParse(parts[1], NumberStyles.Any, UsCulture, out val))
{
_height = val;
}
}
}
}
}
}
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