mirror of https://github.com/dahall/Vanara.git
82 lines
3.4 KiB
C#
82 lines
3.4 KiB
C#
using System.Runtime.InteropServices;
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namespace Vanara.PInvoke
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{
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/// <summary>The COLORREF value is used to specify an RGB color in the form <c>0x00bbggrr</c>.</summary>
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// typedef DWORD COLORREF;typedef DWORD* LPCOLORREF; https://msdn.microsoft.com/en-us/library/windows/desktop/dd183449(v=vs.85).aspx
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[PInvokeData("Windef.h", MSDNShortId = "dd183449")]
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[StructLayout(LayoutKind.Explicit, Size = 4)]
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public struct COLORREF
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{
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/// <summary>The DWORD value</summary>
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[FieldOffset(0)]
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private uint Value;
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/// <summary>The intensity of the red color.</summary>
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[FieldOffset(0)]
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public byte R;
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/// <summary>The intensity of the green color.</summary>
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[FieldOffset(1)]
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public byte G;
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/// <summary>The intensity of the blue color.</summary>
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[FieldOffset(2)]
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public byte B;
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private const uint CLR_NONE = 0xFFFFFFFF;
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private const uint CLR_DEFAULT = 0xFF000000;
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/// <summary>Initializes a new instance of the <see cref="COLORREF"/> struct.</summary>
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/// <param name="r">The intensity of the red color.</param>
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/// <param name="g">The intensity of the green color.</param>
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/// <param name="b">The intensity of the blue color.</param>
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public COLORREF(byte r, byte g, byte b)
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{
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Value = 0;
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R = r;
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G = g;
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B = b;
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}
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/// <summary>Initializes a new instance of the <see cref="COLORREF"/> struct.</summary>
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/// <param name="value">The packed DWORD value.</param>
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public COLORREF(uint value)
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{
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R = 0;
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G = 0;
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B = 0;
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Value = value & 0x00FFFFFF;
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}
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/// <summary>Initializes a new instance of the <see cref="COLORREF"/> struct.</summary>
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/// <param name="color">The color.</param>
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public COLORREF(System.Drawing.Color color) : this(color == System.Drawing.Color.Transparent ? CLR_NONE : (uint)color.ToArgb()) { }
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/// <summary>Performs an implicit conversion from <see cref="COLORREF"/> to <see cref="System.Drawing.Color"/>.</summary>
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/// <param name="cr">The <see cref="COLORREF"/> value.</param>
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/// <returns>The result of the conversion.</returns>
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public static implicit operator System.Drawing.Color(COLORREF cr) => cr.Value == CLR_NONE ? System.Drawing.Color.Transparent : System.Drawing.Color.FromArgb(cr.R, cr.G, cr.B);
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/// <summary>Performs an implicit conversion from <see cref="System.Drawing.Color"/> to <see cref="COLORREF"/>.</summary>
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/// <param name="clr">The <see cref="System.Drawing.Color"/> value.</param>
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/// <returns>The result of the conversion.</returns>
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public static implicit operator COLORREF(System.Drawing.Color clr) => new COLORREF(clr);
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/// <summary>Performs an implicit conversion from <see cref="COLORREF"/> to <see cref="System.UInt32"/>.</summary>
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/// <param name="cr">The <see cref="COLORREF"/> value.</param>
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/// <returns>The result of the conversion.</returns>
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public static implicit operator uint(COLORREF cr) => cr.Value;
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/// <summary>Performs an implicit conversion from <see cref="System.UInt32"/> to <see cref="COLORREF"/>.</summary>
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/// <param name="value">The <see cref="uint"/> value.</param>
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/// <returns>The result of the conversion.</returns>
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public static implicit operator COLORREF(uint value) => new COLORREF(value);
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/// <summary>Static reference for CLR_NONE representing no color.</summary>
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public static COLORREF None = new COLORREF(CLR_NONE);
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/// <summary>Static reference for CLR_DEFAULT representing the default color.</summary>
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public static COLORREF Default = new COLORREF(0xFF000000);
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}
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} |