mirror of https://github.com/SixLabors/ImageSharp
13 changed files with 9 additions and 826 deletions
@ -1,39 +0,0 @@ |
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// <copyright file="ComparableExtensions.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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/// <summary>
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/// Extension methods for classes that implement <see cref="IComparable{T}"/>.
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/// </summary>
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internal static class ComparableExtensions |
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{ |
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/// <summary>
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/// Restricts a <see cref="int"/> to be within a specified range.
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/// </summary>
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/// <param name="value">The The value to clamp.</param>
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/// <param name="min">The minimum value. If value is less than min, min will be returned.</param>
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/// <param name="max">The maximum value. If value is greater than max, max will be returned.</param>
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/// <returns>
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/// The <see cref="int"/> representing the clamped value.
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/// </returns>
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public static int Clamp(this int value, int min, int max) |
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{ |
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if (value > max) |
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{ |
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return max; |
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} |
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if (value < min) |
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{ |
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return min; |
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} |
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return value; |
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} |
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} |
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} |
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@ -1,30 +0,0 @@ |
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// <copyright file="ImageMaths.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 System.Linq; |
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using System.Numerics; |
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/// <summary>
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/// Provides common mathematical methods.
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/// </summary>
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internal static class ImageMaths |
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{ |
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/// <summary>
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/// Returns how many bits are required to store the specified number of colors.
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/// Performs a Log2() on the value.
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/// </summary>
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/// <param name="colors">The number of colors.</param>
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/// <returns>
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/// The <see cref="int"/>
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/// </returns>
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public static int GetBitsNeededForColorDepth(int colors) |
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{ |
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return (int)Math.Ceiling(Math.Log(colors, 2)); |
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} |
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} |
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} |
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@ -1,46 +0,0 @@ |
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// <copyright file="StreamExtensions.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.Buffers; |
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using System.IO; |
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/// <summary>
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/// Extension methods for the <see cref="Stream"/> type.
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/// </summary>
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internal static class StreamExtensions |
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{ |
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/// <summary>
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/// Skips the number of bytes in the given stream.
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/// </summary>
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/// <param name="stream">The stream.</param>
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/// <param name="count">The count.</param>
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public static void Skip(this Stream stream, int count) |
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{ |
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if (count < 1) |
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{ |
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return; |
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} |
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if (stream.CanSeek) |
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{ |
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stream.Position += count; |
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} |
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else |
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{ |
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byte[] foo = ArrayPool<byte>.Shared.Rent(count); |
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try |
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{ |
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stream.Read(foo, 0, count); |
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} |
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finally |
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{ |
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ArrayPool<byte>.Shared.Return(foo); |
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} |
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} |
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} |
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} |
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} |
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@ -1,63 +0,0 @@ |
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// <copyright file="ComparableExtensions.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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/// <summary>
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/// Extension methods for classes that implement <see cref="IComparable{T}"/>.
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/// </summary>
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internal static class ComparableExtensions |
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{ |
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/// <summary>
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/// Restricts a <see cref="int"/> to be within a specified range.
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/// </summary>
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/// <param name="value">The The value to clamp.</param>
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/// <param name="min">The minimum value. If value is less than min, min will be returned.</param>
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/// <param name="max">The maximum value. If value is greater than max, max will be returned.</param>
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/// <returns>
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/// The <see cref="int"/> representing the clamped value.
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/// </returns>
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public static int Clamp(this int value, int min, int max) |
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{ |
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if (value > max) |
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{ |
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return max; |
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} |
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if (value < min) |
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{ |
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return min; |
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} |
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return value; |
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} |
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/// <summary>
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/// Restricts a <see cref="float"/> to be within a specified range.
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/// </summary>
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/// <param name="value">The The value to clamp.</param>
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/// <param name="min">The minimum value. If value is less than min, min will be returned.</param>
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/// <param name="max">The maximum value. If value is greater than max, max will be returned.</param>
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/// <returns>
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/// The <see cref="float"/> representing the clamped value.
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/// </returns>
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public static float Clamp(this float value, float min, float max) |
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{ |
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if (value > max) |
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{ |
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return max; |
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} |
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if (value < min) |
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{ |
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return min; |
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} |
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return value; |
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} |
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} |
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} |
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@ -1,45 +0,0 @@ |
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// <copyright file="ByteExtensions.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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/// <summary>
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/// Extension methods for the <see cref="byte"/> struct.
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/// </summary>
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internal static class ByteExtensions |
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{ |
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/// <summary>
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/// Optimized <see cref="T:byte[]"/> reversal algorithm.
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/// </summary>
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/// <param name="source">The byte array.</param>
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public static void ReverseBytes(this byte[] source) |
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{ |
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ReverseBytes(source, 0, source.Length); |
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} |
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/// <summary>
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/// Optimized <see cref="T:byte[]"/> reversal algorithm.
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/// </summary>
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/// <param name="source">The byte array.</param>
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/// <param name="index">The index.</param>
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/// <param name="length">The length.</param>
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/// <exception cref="System.ArgumentNullException"><paramref name="source"/> is null.</exception>
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public static void ReverseBytes(this byte[] source, int index, int length) |
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{ |
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Guard.NotNull(source, nameof(source)); |
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int i = index; |
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int j = index + length - 1; |
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while (i < j) |
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{ |
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byte temp = source[i]; |
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source[i] = source[j]; |
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source[j] = temp; |
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i++; |
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j--; |
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} |
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} |
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} |
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} |
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@ -1,52 +0,0 @@ |
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// <copyright file="ComparableExtensions.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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/// <summary>
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/// Extension methods for classes that implement <see cref="IComparable{T}"/>.
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/// </summary>
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internal static class ComparableExtensions |
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{ |
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/// <summary>
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/// Restricts a <see cref="int"/> to be within a specified range.
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/// </summary>
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/// <param name="value">The The value to clamp.</param>
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/// <param name="min">The minimum value. If value is less than min, min will be returned.</param>
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/// <param name="max">The maximum value. If value is greater than max, max will be returned.</param>
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/// <returns>
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/// The <see cref="int"/> representing the clamped value.
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/// </returns>
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public static int Clamp(this int value, int min, int max) |
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{ |
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if (value > max) |
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{ |
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return max; |
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} |
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if (value < min) |
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{ |
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return min; |
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} |
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return value; |
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} |
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/// <summary>
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/// Swaps the references to two objects in memory.
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/// </summary>
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/// <param name="first">The first reference.</param>
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/// <param name="second">The second reference.</param>
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/// <typeparam name="T">The type of object.</typeparam>
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public static void Swap<T>(ref T first, ref T second) |
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{ |
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T temp = second; |
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second = first; |
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first = temp; |
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} |
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} |
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} |
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@ -1,30 +0,0 @@ |
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// <copyright file="ImageMaths.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 System.Linq; |
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using System.Numerics; |
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/// <summary>
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/// Provides common mathematical methods.
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/// </summary>
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internal static class ImageMaths |
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{ |
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/// <summary>
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/// Returns how many bits are required to store the specified number of colors.
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/// Performs a Log2() on the value.
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/// </summary>
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/// <param name="colors">The number of colors.</param>
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/// <returns>
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/// The <see cref="int"/>
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/// </returns>
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public static int GetBitsNeededForColorDepth(int colors) |
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{ |
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return (int)Math.Ceiling(Math.Log(colors, 2)); |
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} |
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} |
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} |
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@ -1,46 +0,0 @@ |
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// <copyright file="StreamExtensions.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.Buffers; |
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using System.IO; |
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/// <summary>
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/// Extension methods for the <see cref="Stream"/> type.
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/// </summary>
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internal static class StreamExtensions |
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{ |
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/// <summary>
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/// Skips the number of bytes in the given stream.
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/// </summary>
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/// <param name="stream">The stream.</param>
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/// <param name="count">The count.</param>
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public static void Skip(this Stream stream, int count) |
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{ |
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if (count < 1) |
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{ |
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return; |
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} |
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if (stream.CanSeek) |
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{ |
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stream.Position += count; |
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} |
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else |
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{ |
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byte[] foo = ArrayPool<byte>.Shared.Rent(count); |
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try |
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{ |
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stream.Read(foo, 0, count); |
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} |
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finally |
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{ |
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ArrayPool<byte>.Shared.Return(foo); |
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} |
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} |
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} |
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} |
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} |
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@ -1,182 +0,0 @@ |
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// <copyright file="ComparableExtensions.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.Processing |
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{ |
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using System; |
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/// <summary>
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/// Extension methods for classes that implement <see cref="IComparable{T}"/>.
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/// </summary>
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internal static class ComparableExtensions |
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{ |
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/// <summary>
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/// Restricts a <see cref="byte"/> to be within a specified range.
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/// </summary>
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/// <param name="value">The The value to clamp.</param>
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/// <param name="min">The minimum value. If value is less than min, min will be returned.</param>
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/// <param name="max">The maximum value. If value is greater than max, max will be returned.</param>
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/// <returns>
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/// The <see cref="byte"/> representing the clamped value.
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/// </returns>
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public static byte Clamp(this byte value, byte min, byte max) |
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{ |
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// Order is important here as someone might set min to higher than max.
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if (value > max) |
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{ |
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return max; |
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} |
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if (value < min) |
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{ |
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return min; |
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} |
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return value; |
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} |
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/// <summary>
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/// Restricts a <see cref="uint"/> to be within a specified range.
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/// </summary>
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/// <param name="value">The The value to clamp.</param>
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/// <param name="min">The minimum value. If value is less than min, min will be returned.</param>
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/// <param name="max">The maximum value. If value is greater than max, max will be returned.</param>
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/// <returns>
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/// The <see cref="int"/> representing the clamped value.
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/// </returns>
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public static uint Clamp(this uint value, uint min, uint max) |
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{ |
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if (value > max) |
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{ |
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return max; |
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} |
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if (value < min) |
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{ |
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return min; |
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} |
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||||
return value; |
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} |
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/// <summary>
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/// Restricts a <see cref="int"/> to be within a specified range.
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||||
/// </summary>
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||||
/// <param name="value">The The value to clamp.</param>
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/// <param name="min">The minimum value. If value is less than min, min will be returned.</param>
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||||
/// <param name="max">The maximum value. If value is greater than max, max will be returned.</param>
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/// <returns>
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/// The <see cref="int"/> representing the clamped value.
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/// </returns>
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public static int Clamp(this int value, int min, int max) |
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{ |
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if (value > max) |
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{ |
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return max; |
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||||
} |
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if (value < min) |
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{ |
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return min; |
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} |
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return value; |
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} |
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/// <summary>
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/// Restricts a <see cref="float"/> to be within a specified range.
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/// </summary>
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/// <param name="value">The The value to clamp.</param>
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/// <param name="min">The minimum value. If value is less than min, min will be returned.</param>
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/// <param name="max">The maximum value. If value is greater than max, max will be returned.</param>
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/// <returns>
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/// The <see cref="float"/> representing the clamped value.
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/// </returns>
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public static float Clamp(this float value, float min, float max) |
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{ |
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if (value > max) |
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{ |
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return max; |
|
||||
} |
|
||||
|
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||||
if (value < min) |
|
||||
{ |
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return min; |
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||||
} |
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||||
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||||
return value; |
|
||||
} |
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||||
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||||
/// <summary>
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||||
/// Restricts a <see cref="double"/> to be within a specified range.
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|
||||
/// </summary>
|
|
||||
/// <param name="value">The The value to clamp.</param>
|
|
||||
/// <param name="min">The minimum value. If value is less than min, min will be returned.</param>
|
|
||||
/// <param name="max">The maximum value. If value is greater than max, max will be returned.</param>
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|
||||
/// <returns>
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||||
/// The <see cref="double"/> representing the clamped value.
|
|
||||
/// </returns>
|
|
||||
public static double Clamp(this double value, double min, double max) |
|
||||
{ |
|
||||
if (value > max) |
|
||||
{ |
|
||||
return max; |
|
||||
} |
|
||||
|
|
||||
if (value < min) |
|
||||
{ |
|
||||
return min; |
|
||||
} |
|
||||
|
|
||||
return value; |
|
||||
} |
|
||||
|
|
||||
/// <summary>
|
|
||||
/// Converts an <see cref="int"/> to a <see cref="byte"/> first restricting the value between the
|
|
||||
/// minimum and maximum allowable ranges.
|
|
||||
/// </summary>
|
|
||||
/// <param name="value">The <see cref="int"/> this method extends.</param>
|
|
||||
/// <returns>The <see cref="byte"/></returns>
|
|
||||
public static byte ToByte(this int value) |
|
||||
{ |
|
||||
return (byte)value.Clamp(0, 255); |
|
||||
} |
|
||||
|
|
||||
/// <summary>
|
|
||||
/// Converts an <see cref="float"/> to a <see cref="byte"/> first restricting the value between the
|
|
||||
/// minimum and maximum allowable ranges.
|
|
||||
/// </summary>
|
|
||||
/// <param name="value">The <see cref="float"/> this method extends.</param>
|
|
||||
/// <returns>The <see cref="byte"/></returns>
|
|
||||
public static byte ToByte(this float value) |
|
||||
{ |
|
||||
return (byte)value.Clamp(0, 255); |
|
||||
} |
|
||||
|
|
||||
/// <summary>
|
|
||||
/// Converts an <see cref="double"/> to a <see cref="byte"/> first restricting the value between the
|
|
||||
/// minimum and maximum allowable ranges.
|
|
||||
/// </summary>
|
|
||||
/// <param name="value">The <see cref="double"/> this method extends.</param>
|
|
||||
/// <returns>The <see cref="byte"/></returns>
|
|
||||
public static byte ToByte(this double value) |
|
||||
{ |
|
||||
return (byte)value.Clamp(0, 255); |
|
||||
} |
|
||||
|
|
||||
/// <summary>
|
|
||||
/// Swaps the references to two objects in memory.
|
|
||||
/// </summary>
|
|
||||
/// <param name="first">The first reference.</param>
|
|
||||
/// <param name="second">The second reference.</param>
|
|
||||
/// <typeparam name="T">The type of object.</typeparam>
|
|
||||
public static void Swap<T>(ref T first, ref T second) |
|
||||
{ |
|
||||
T temp = second; |
|
||||
second = first; |
|
||||
first = temp; |
|
||||
} |
|
||||
} |
|
||||
} |
|
||||
@ -1,18 +0,0 @@ |
|||||
// <copyright file="Constants.cs" company="James Jackson-South">
|
|
||||
// Copyright (c) James Jackson-South and contributors.
|
|
||||
// Licensed under the Apache License, Version 2.0.
|
|
||||
// </copyright>
|
|
||||
|
|
||||
namespace ImageSharp.Processing |
|
||||
{ |
|
||||
/// <summary>
|
|
||||
/// Common constants used throughout the project
|
|
||||
/// </summary>
|
|
||||
internal static class Constants |
|
||||
{ |
|
||||
/// <summary>
|
|
||||
/// The epsilon for comparing floating point numbers.
|
|
||||
/// </summary>
|
|
||||
public static readonly float Epsilon = 0.001f; |
|
||||
} |
|
||||
} |
|
||||
@ -1,273 +0,0 @@ |
|||||
// <copyright file="ImageMaths.cs" company="James Jackson-South">
|
|
||||
// Copyright (c) James Jackson-South and contributors.
|
|
||||
// Licensed under the Apache License, Version 2.0.
|
|
||||
// </copyright>
|
|
||||
|
|
||||
namespace ImageSharp.Processing |
|
||||
{ |
|
||||
using System; |
|
||||
using System.Linq; |
|
||||
using System.Numerics; |
|
||||
|
|
||||
/// <summary>
|
|
||||
/// Provides common mathematical methods.
|
|
||||
/// </summary>
|
|
||||
internal static class ImageMaths |
|
||||
{ |
|
||||
/// <summary>
|
|
||||
/// Implementation of 1D Gaussian G(x) function
|
|
||||
/// </summary>
|
|
||||
/// <param name="x">The x provided to G(x).</param>
|
|
||||
/// <param name="sigma">The spread of the blur.</param>
|
|
||||
/// <returns>The Gaussian G(x)</returns>
|
|
||||
public static float Gaussian(float x, float sigma) |
|
||||
{ |
|
||||
const float Numerator = 1.0f; |
|
||||
float denominator = (float)(Math.Sqrt(2 * Math.PI) * sigma); |
|
||||
|
|
||||
float exponentNumerator = -x * x; |
|
||||
float exponentDenominator = (float)(2 * Math.Pow(sigma, 2)); |
|
||||
|
|
||||
float left = Numerator / denominator; |
|
||||
float right = (float)Math.Exp(exponentNumerator / exponentDenominator); |
|
||||
|
|
||||
return left * right; |
|
||||
} |
|
||||
|
|
||||
/// <summary>
|
|
||||
/// Returns the result of a B-C filter against the given value.
|
|
||||
/// <see href="http://www.imagemagick.org/Usage/filter/#cubic_bc"/>
|
|
||||
/// </summary>
|
|
||||
/// <param name="x">The value to process.</param>
|
|
||||
/// <param name="b">The B-Spline curve variable.</param>
|
|
||||
/// <param name="c">The Cardinal curve variable.</param>
|
|
||||
/// <returns>
|
|
||||
/// The <see cref="float"/>.
|
|
||||
/// </returns>
|
|
||||
public static float GetBcValue(float x, float b, float c) |
|
||||
{ |
|
||||
float temp; |
|
||||
|
|
||||
if (x < 0F) |
|
||||
{ |
|
||||
x = -x; |
|
||||
} |
|
||||
|
|
||||
temp = x * x; |
|
||||
if (x < 1F) |
|
||||
{ |
|
||||
x = ((12 - (9 * b) - (6 * c)) * (x * temp)) + ((-18 + (12 * b) + (6 * c)) * temp) + (6 - (2 * b)); |
|
||||
return x / 6F; |
|
||||
} |
|
||||
|
|
||||
if (x < 2F) |
|
||||
{ |
|
||||
x = ((-b - (6 * c)) * (x * temp)) + (((6 * b) + (30 * c)) * temp) + (((-12 * b) - (48 * c)) * x) + ((8 * b) + (24 * c)); |
|
||||
return x / 6F; |
|
||||
} |
|
||||
|
|
||||
return 0F; |
|
||||
} |
|
||||
|
|
||||
/// <summary>
|
|
||||
/// Gets the result of a sine cardinal function for the given value.
|
|
||||
/// </summary>
|
|
||||
/// <param name="x">The value to calculate the result for.</param>
|
|
||||
/// <returns>
|
|
||||
/// The <see cref="float"/>.
|
|
||||
/// </returns>
|
|
||||
public static float SinC(float x) |
|
||||
{ |
|
||||
if (Math.Abs(x) > Constants.Epsilon) |
|
||||
{ |
|
||||
x *= (float)Math.PI; |
|
||||
return Clean((float)Math.Sin(x) / x); |
|
||||
} |
|
||||
|
|
||||
return 1.0f; |
|
||||
} |
|
||||
|
|
||||
/// <summary>
|
|
||||
/// Returns the given degrees converted to radians.
|
|
||||
/// </summary>
|
|
||||
/// <param name="degrees">The angle in degrees.</param>
|
|
||||
/// <returns>
|
|
||||
/// The <see cref="float"/> representing the degree as radians.
|
|
||||
/// </returns>
|
|
||||
public static float DegreesToRadians(float degrees) |
|
||||
{ |
|
||||
return degrees * (float)(Math.PI / 180); |
|
||||
} |
|
||||
|
|
||||
/// <summary>
|
|
||||
/// Gets the bounding <see cref="Rectangle"/> from the given points.
|
|
||||
/// </summary>
|
|
||||
/// <param name="topLeft">
|
|
||||
/// The <see cref="Point"/> designating the top left position.
|
|
||||
/// </param>
|
|
||||
/// <param name="bottomRight">
|
|
||||
/// The <see cref="Point"/> designating the bottom right position.
|
|
||||
/// </param>
|
|
||||
/// <returns>
|
|
||||
/// The bounding <see cref="Rectangle"/>.
|
|
||||
/// </returns>
|
|
||||
public static Rectangle GetBoundingRectangle(Point topLeft, Point bottomRight) |
|
||||
{ |
|
||||
return new Rectangle(topLeft.X, topLeft.Y, bottomRight.X - topLeft.X, bottomRight.Y - topLeft.Y); |
|
||||
} |
|
||||
|
|
||||
/// <summary>
|
|
||||
/// Gets the bounding <see cref="Rectangle"/> from the given matrix.
|
|
||||
/// </summary>
|
|
||||
/// <param name="rectangle">The source rectangle.</param>
|
|
||||
/// <param name="matrix">The transformation matrix.</param>
|
|
||||
/// <returns>
|
|
||||
/// The <see cref="Rectangle"/>.
|
|
||||
/// </returns>
|
|
||||
public static Rectangle GetBoundingRectangle(Rectangle rectangle, Matrix3x2 matrix) |
|
||||
{ |
|
||||
Vector2 leftTop = Vector2.Transform(new Vector2(rectangle.Left, rectangle.Top), matrix); |
|
||||
Vector2 rightTop = Vector2.Transform(new Vector2(rectangle.Right, rectangle.Top), matrix); |
|
||||
Vector2 leftBottom = Vector2.Transform(new Vector2(rectangle.Left, rectangle.Bottom), matrix); |
|
||||
Vector2 rightBottom = Vector2.Transform(new Vector2(rectangle.Right, rectangle.Bottom), matrix); |
|
||||
|
|
||||
Vector2[] allCorners = { leftTop, rightTop, leftBottom, rightBottom }; |
|
||||
float extentX = allCorners.Select(v => v.X).Max() - allCorners.Select(v => v.X).Min(); |
|
||||
float extentY = allCorners.Select(v => v.Y).Max() - allCorners.Select(v => v.Y).Min(); |
|
||||
return new Rectangle(0, 0, (int)extentX, (int)extentY); |
|
||||
} |
|
||||
|
|
||||
/// <summary>
|
|
||||
/// Finds the bounding rectangle based on the first instance of any color component other
|
|
||||
/// than the given one.
|
|
||||
/// </summary>
|
|
||||
/// <typeparam name="TColor">The pixel format.</typeparam>
|
|
||||
/// <param name="bitmap">The <see cref="Image"/> to search within.</param>
|
|
||||
/// <param name="componentValue">The color component value to remove.</param>
|
|
||||
/// <param name="channel">The <see cref="RgbaComponent"/> channel to test against.</param>
|
|
||||
/// <returns>
|
|
||||
/// The <see cref="Rectangle"/>.
|
|
||||
/// </returns>
|
|
||||
public static Rectangle GetFilteredBoundingRectangle<TColor>(ImageBase<TColor> bitmap, float componentValue, RgbaComponent channel = RgbaComponent.B) |
|
||||
where TColor : struct, IPackedPixel, IEquatable<TColor> |
|
||||
{ |
|
||||
int width = bitmap.Width; |
|
||||
int height = bitmap.Height; |
|
||||
Point topLeft = default(Point); |
|
||||
Point bottomRight = default(Point); |
|
||||
|
|
||||
Func<PixelAccessor<TColor>, int, int, float, bool> delegateFunc; |
|
||||
|
|
||||
// Determine which channel to check against
|
|
||||
switch (channel) |
|
||||
{ |
|
||||
case RgbaComponent.R: |
|
||||
delegateFunc = (pixels, x, y, b) => Math.Abs(pixels[x, y].ToVector4().X - b) > Constants.Epsilon; |
|
||||
break; |
|
||||
|
|
||||
case RgbaComponent.G: |
|
||||
delegateFunc = (pixels, x, y, b) => Math.Abs(pixels[x, y].ToVector4().Y - b) > Constants.Epsilon; |
|
||||
break; |
|
||||
|
|
||||
case RgbaComponent.B: |
|
||||
delegateFunc = (pixels, x, y, b) => Math.Abs(pixels[x, y].ToVector4().Z - b) > Constants.Epsilon; |
|
||||
break; |
|
||||
|
|
||||
default: |
|
||||
delegateFunc = (pixels, x, y, b) => Math.Abs(pixels[x, y].ToVector4().W - b) > Constants.Epsilon; |
|
||||
break; |
|
||||
} |
|
||||
|
|
||||
Func<PixelAccessor<TColor>, int> getMinY = pixels => |
|
||||
{ |
|
||||
for (int y = 0; y < height; y++) |
|
||||
{ |
|
||||
for (int x = 0; x < width; x++) |
|
||||
{ |
|
||||
if (delegateFunc(pixels, x, y, componentValue)) |
|
||||
{ |
|
||||
return y; |
|
||||
} |
|
||||
} |
|
||||
} |
|
||||
|
|
||||
return 0; |
|
||||
}; |
|
||||
|
|
||||
Func<PixelAccessor<TColor>, int> getMaxY = pixels => |
|
||||
{ |
|
||||
for (int y = height - 1; y > -1; y--) |
|
||||
{ |
|
||||
for (int x = 0; x < width; x++) |
|
||||
{ |
|
||||
if (delegateFunc(pixels, x, y, componentValue)) |
|
||||
{ |
|
||||
return y; |
|
||||
} |
|
||||
} |
|
||||
} |
|
||||
|
|
||||
return height; |
|
||||
}; |
|
||||
|
|
||||
Func<PixelAccessor<TColor>, int> getMinX = pixels => |
|
||||
{ |
|
||||
for (int x = 0; x < width; x++) |
|
||||
{ |
|
||||
for (int y = 0; y < height; y++) |
|
||||
{ |
|
||||
if (delegateFunc(pixels, x, y, componentValue)) |
|
||||
{ |
|
||||
return x; |
|
||||
} |
|
||||
} |
|
||||
} |
|
||||
|
|
||||
return 0; |
|
||||
}; |
|
||||
|
|
||||
Func<PixelAccessor<TColor>, int> getMaxX = pixels => |
|
||||
{ |
|
||||
for (int x = width - 1; x > -1; x--) |
|
||||
{ |
|
||||
for (int y = 0; y < height; y++) |
|
||||
{ |
|
||||
if (delegateFunc(pixels, x, y, componentValue)) |
|
||||
{ |
|
||||
return x; |
|
||||
} |
|
||||
} |
|
||||
} |
|
||||
|
|
||||
return height; |
|
||||
}; |
|
||||
|
|
||||
using (PixelAccessor<TColor> bitmapPixels = bitmap.Lock()) |
|
||||
{ |
|
||||
topLeft.Y = getMinY(bitmapPixels); |
|
||||
topLeft.X = getMinX(bitmapPixels); |
|
||||
bottomRight.Y = (getMaxY(bitmapPixels) + 1).Clamp(0, height); |
|
||||
bottomRight.X = (getMaxX(bitmapPixels) + 1).Clamp(0, width); |
|
||||
} |
|
||||
|
|
||||
return GetBoundingRectangle(topLeft, bottomRight); |
|
||||
} |
|
||||
|
|
||||
/// <summary>
|
|
||||
/// Ensures that any passed double is correctly rounded to zero
|
|
||||
/// </summary>
|
|
||||
/// <param name="x">The value to clean.</param>
|
|
||||
/// <returns>
|
|
||||
/// The <see cref="float"/>
|
|
||||
/// </returns>.
|
|
||||
private static float Clean(float x) |
|
||||
{ |
|
||||
if (Math.Abs(x) < Constants.Epsilon) |
|
||||
{ |
|
||||
return 0F; |
|
||||
} |
|
||||
|
|
||||
return x; |
|
||||
} |
|
||||
} |
|
||||
} |
|
||||
Loading…
Reference in new issue