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using System;
using System.Drawing;
namespace MediaBrowser.Common.Drawing
{
public static class DrawingUtils
{
/// <summary>
/// Resizes a set of dimensions
/// </summary>
public static Size Resize(int currentWidth, int currentHeight, int? width, int? height, int? maxWidth, int? maxHeight)
{
return Resize(new Size(currentWidth, 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 neight, 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 Size Resize(Size size, int? width, int? height, int? maxWidth, int? maxHeight)
{
decimal newWidth = size.Width;
decimal 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 Size(Convert.ToInt32(newWidth), Convert.ToInt32(newHeight));
}
private static decimal GetNewWidth(decimal currentHeight, decimal currentWidth, int newHeight)
{
decimal scaleFactor = newHeight;
scaleFactor /= currentHeight;
scaleFactor *= currentWidth;
return scaleFactor;
}
private static decimal GetNewHeight(decimal currentHeight, decimal currentWidth, int newWidth)
{
decimal scaleFactor = newWidth;
scaleFactor /= currentWidth;
scaleFactor *= currentHeight;
return scaleFactor;
}
}
}
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