46 lines
1.9 KiB
C#
46 lines
1.9 KiB
C#
namespace OxyPlot.ImageSharp
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{
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using SixLabors.ImageSharp;
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using SixLabors.ImageSharp.PixelFormats;
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using SixLabors.ImageSharp.Processing.Processors;
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/// <summary>
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/// Performs a 'mirror' (clamp) along the edge of the image, which is used to assist with drawing non-pixel aligned and interpolate images.
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/// </summary>
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internal class MirrorPadProcessor : IImageProcessor
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{
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private class MirrorPadImplementation<TPixel> : ImageProcessor<TPixel> where TPixel : unmanaged, IPixel<TPixel>
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{
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public MirrorPadImplementation(Configuration configuration, Image<TPixel> source, Rectangle sourceRectangle)
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: base(configuration, source, sourceRectangle)
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{
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}
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protected override void OnFrameApply(ImageFrame<TPixel> source)
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{
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source[0, 0] = source[1, 1];
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source[source.Width - 1, 0] = source[source.Width - 2, 1];
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source[0, source.Height - 1] = source[1, source.Height - 2];
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source[source.Width - 1, source.Height - 1] = source[source.Width - 2, source.Height - 2];
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for (int x = 1; x < source.Width - 1; x++)
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{
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source[x, 0] = source[x, 1];
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source[x, source.Height - 1] = source[x, source.Height - 2];
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}
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for (int y = 1; y < source.Height - 1; y++)
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{
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source[0, y] = source[1, y];
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source[source.Width - 1, y] = source[source.Width - 2, y];
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}
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}
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}
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public IImageProcessor<TPixel> CreatePixelSpecificProcessor<TPixel>(Configuration configuration, Image<TPixel> source, Rectangle sourceRectangle) where TPixel : unmanaged, IPixel<TPixel>
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{
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return new MirrorPadImplementation<TPixel>(configuration, source, sourceRectangle);
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}
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}
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}
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