82 lines
2.8 KiB
C#
82 lines
2.8 KiB
C#
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using System;
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using System.Drawing;
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namespace MediaBrowser.Common.Drawing
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{
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public static class DrawingUtils
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{
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/// <summary>
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/// Resizes a set of dimensions
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/// </summary>
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public static Size Resize(int currentWidth, int currentHeight, int? width, int? height, int? maxWidth, int? maxHeight)
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{
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return Resize(new Size(currentWidth, currentHeight), width, height, maxWidth, maxHeight);
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}
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/// <summary>
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/// Resizes a set of dimensions
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/// </summary>
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/// <param name="size">The original size object</param>
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/// <param name="width">A new fixed width, if desired</param>
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/// <param name="height">A new fixed neight, if desired</param>
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/// <param name="maxWidth">A max fixed width, if desired</param>
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/// <param name="maxHeight">A max fixed height, if desired</param>
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/// <returns>A new size object</returns>
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public static Size Resize(Size size, int? width, int? height, int? maxWidth, int? maxHeight)
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{
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decimal newWidth = size.Width;
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decimal newHeight = size.Height;
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if (width.HasValue && height.HasValue)
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{
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newWidth = width.Value;
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newHeight = height.Value;
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}
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else if (height.HasValue)
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{
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newWidth = GetNewWidth(newHeight, newWidth, height.Value);
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newHeight = height.Value;
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}
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else if (width.HasValue)
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{
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newHeight = GetNewHeight(newHeight, newWidth, width.Value);
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newWidth = width.Value;
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}
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if (maxHeight.HasValue && maxHeight < newHeight)
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{
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newWidth = GetNewWidth(newHeight, newWidth, maxHeight.Value);
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newHeight = maxHeight.Value;
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}
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if (maxWidth.HasValue && maxWidth < newWidth)
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{
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newHeight = GetNewHeight(newHeight, newWidth, maxWidth.Value);
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newWidth = maxWidth.Value;
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}
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return new Size(Convert.ToInt32(newWidth), Convert.ToInt32(newHeight));
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}
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private static decimal GetNewWidth(decimal currentHeight, decimal currentWidth, int newHeight)
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{
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decimal scaleFactor = newHeight;
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scaleFactor /= currentHeight;
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scaleFactor *= currentWidth;
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return scaleFactor;
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}
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private static decimal GetNewHeight(decimal currentHeight, decimal currentWidth, int newWidth)
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{
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decimal scaleFactor = newWidth;
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scaleFactor /= currentWidth;
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scaleFactor *= currentHeight;
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return scaleFactor;
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}
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}
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}
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