92 lines
3.0 KiB
C#
92 lines
3.0 KiB
C#
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namespace MediaBrowser.Model.Drawing
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{
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/// <summary>
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/// Class DrawingUtils
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/// </summary>
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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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/// <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 height, 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 ImageSize Resize(ImageSize size,
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double width,
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double height,
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double maxWidth,
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double maxHeight)
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{
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double newWidth = size.Width;
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double newHeight = size.Height;
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if (width > 0 && height > 0)
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{
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newWidth = width;
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newHeight = height;
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}
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else if (height > 0)
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{
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newWidth = GetNewWidth(newHeight, newWidth, height);
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newHeight = height;
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}
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else if (width > 0)
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{
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newHeight = GetNewHeight(newHeight, newWidth, width);
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newWidth = width;
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}
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if (maxHeight > 0 && maxHeight < newHeight)
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{
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newWidth = GetNewWidth(newHeight, newWidth, maxHeight);
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newHeight = maxHeight;
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}
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if (maxWidth > 0 && maxWidth < newWidth)
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{
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newHeight = GetNewHeight(newHeight, newWidth, maxWidth);
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newWidth = maxWidth;
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}
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return new ImageSize { Width = newWidth, Height = newHeight };
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}
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/// <summary>
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/// Gets the new width.
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/// </summary>
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/// <param name="currentHeight">Height of the current.</param>
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/// <param name="currentWidth">Width of the current.</param>
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/// <param name="newHeight">The new height.</param>
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/// <returns>System.Double.</returns>
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private static double GetNewWidth(double currentHeight, double currentWidth, double newHeight)
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{
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double 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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/// <summary>
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/// Gets the new height.
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/// </summary>
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/// <param name="currentHeight">Height of the current.</param>
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/// <param name="currentWidth">Width of the current.</param>
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/// <param name="newWidth">The new width.</param>
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/// <returns>System.Double.</returns>
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private static double GetNewHeight(double currentHeight, double currentWidth, double newWidth)
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{
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double 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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