83 lines
3.2 KiB
C#
83 lines
3.2 KiB
C#
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#region PDFsharp - A .NET library for processing PDF
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//
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// Authors:
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// Stefan Lange
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//
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// Copyright (c) 2005-2017 empira Software GmbH, Cologne Area (Germany)
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//
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// http://www.pdfsharp.com
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// http://sourceforge.net/projects/pdfsharp
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the "Software"),
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// to deal in the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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#endregion
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using System;
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using PdfSharp.Drawing;
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namespace PdfSharp.Pdf.Internal
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{
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/// <summary>
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/// Helper functions for RGB and CMYK colors.
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/// </summary>
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static class ColorSpaceHelper
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{
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/// <summary>
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/// Checks whether a color mode and a color match.
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/// </summary>
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public static XColor EnsureColorMode(PdfColorMode colorMode, XColor color)
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{
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#if true
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if (colorMode == PdfColorMode.Rgb && color.ColorSpace != XColorSpace.Rgb)
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return XColor.FromArgb((int)(color.A * 255), color.R, color.G, color.B);
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if (colorMode == PdfColorMode.Cmyk && color.ColorSpace != XColorSpace.Cmyk)
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return XColor.FromCmyk(color.A, color.C, color.M, color.Y, color.K);
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return color;
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#else
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if (colorMode == PdfColorMode.Rgb && color.ColorSpace != XColorSpace.Rgb)
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throw new InvalidOperationException(PSSR.InappropriateColorSpace(colorMode, color.ColorSpace));
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if (colorMode == PdfColorMode.Cmyk && color.ColorSpace != XColorSpace.Cmyk)
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throw new InvalidOperationException(PSSR.InappropriateColorSpace(colorMode, color.ColorSpace));
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#endif
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}
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/// <summary>
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/// Checks whether the color mode of a document and a color match.
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/// </summary>
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public static XColor EnsureColorMode(PdfDocument document, XColor color)
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{
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if (document == null)
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throw new ArgumentNullException("document");
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return EnsureColorMode(document.Options.ColorMode, color);
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}
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/// <summary>
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/// Determines whether two colors are equal referring to their CMYK color values.
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/// </summary>
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public static bool IsEqualCmyk(XColor x, XColor y)
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{
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if (x.ColorSpace != XColorSpace.Cmyk || y.ColorSpace != XColorSpace.Cmyk)
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return false;
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return x.C == y.C && x.M == y.M && x.Y == y.Y && x.K == y.K;
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}
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}
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}
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