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46 lines
1.9 KiB
46 lines
1.9 KiB
// <copyright file="Alpha.cs" company="James Jackson-South">
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// Copyright (c) James Jackson-South and contributors.
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// Licensed under the Apache License, Version 2.0.
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// </copyright>
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namespace ImageSharp
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{
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using System;
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using Processing.Processors;
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/// <summary>
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/// Extension methods for the <see cref="Image"/> type.
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/// </summary>
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public static partial class ImageExtensions
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{
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/// <summary>
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/// Alters the alpha component of the image.
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/// </summary>
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/// <typeparam name="TColor">The pixel format.</typeparam>
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/// <param name="source">The image this method extends.</param>
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/// <param name="percent">The new opacity of the image. Must be between 0 and 100.</param>
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/// <returns>The <see cref="Image{TColor}"/>.</returns>
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public static Image<TColor> Alpha<TColor>(this Image<TColor> source, int percent)
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where TColor : struct, IPackedPixel, IEquatable<TColor>
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{
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return Alpha(source, percent, source.Bounds);
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}
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/// <summary>
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/// Alters the alpha component of the image.
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/// </summary>
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/// <typeparam name="TColor">The pixel format.</typeparam>
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/// <param name="source">The image this method extends.</param>
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/// <param name="percent">The new opacity of the image. Must be between 0 and 100.</param>
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/// <param name="rectangle">
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/// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
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/// </param>
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/// <returns>The <see cref="Image"/>.</returns>
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public static Image<TColor> Alpha<TColor>(this Image<TColor> source, int percent, Rectangle rectangle)
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where TColor : struct, IPackedPixel, IEquatable<TColor>
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{
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return source.Apply(rectangle, new AlphaProcessor<TColor>(percent));
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}
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}
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}
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