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#region PDFsharp - A .NET library for processing PDF
//
// Authors:
// Stefan Lange (mailto:Stefan.Lange@pdfsharp.com)
//
// Copyright (c) 2005-2008 empira Software GmbH, Cologne (Germany)
//
// http://www.pdfsharp.com
// http://sourceforge.net/projects/pdfsharp
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
#endregion
using System;
using System.Diagnostics;
using System.Collections;
using System.Globalization;
using System.Text;
using System.IO;
using PdfSharp.Drawing;
using PdfSharp.Internal;
#if false
namespace PdfSharp.Pdf.Advanced
{
/// <summary>
/// Contains all used Shading objects of a document.
/// </summary>
internal sealed class PdfShadingTable : PdfResourceTable
{
/// <summary>
/// Initializes a new instance of this class, which is a singleton for each document.
/// </summary>
public PdfShadingTable(PdfDocument document) : base(document)
{
}
/// <summary>
/// Gets a PdfExtGState with the keys 'CA' and 'ca' set to the specified alpha value.
/// </summary>
public PdfExtGState GetExtGState(double alpha)
{
string key = MakeKey(alpha);
PdfExtGState extGState = this.alphaValues[key] as PdfExtGState;
if (extGState == null)
{
extGState = new PdfExtGState(this.document);
extGState.Elements[PdfExtGState.Keys.CA] = new PdfReal(alpha);
extGState.Elements[PdfExtGState.Keys.ca] = new PdfReal(alpha);
this.alphaValues[key] = extGState;
}
return extGState;
}
/// <summary>
/// Gets a PdfExtGState with the key 'CA' set to the specified alpha value.
/// </summary>
public PdfExtGState GetExtGStateStroke(double alpha)
{
string key = MakeKey(alpha);
PdfExtGState extGState = this.strokeAlphaValues[key] as PdfExtGState;
if (extGState == null)
{
extGState = new PdfExtGState(this.document);
extGState.Elements[PdfExtGState.Keys.CA] = new PdfReal(alpha);
this.strokeAlphaValues[key] = extGState;
}
return extGState;
}
/// <summary>
/// Gets a PdfExtGState with the key 'ca' set to the specified alpha value.
/// </summary>
public PdfExtGState GetExtGStateNonStroke(double alpha)
{
string key = MakeKey(alpha);
PdfExtGState extGState = this.nonStrokeAlphaValues[key] as PdfExtGState;
if (extGState == null)
{
extGState = new PdfExtGState(this.document);
extGState.Elements[PdfExtGState.Keys.ca] = new PdfReal(alpha);
this.nonStrokeAlphaValues[key] = extGState;
}
return extGState;
}
/// <summary>
/// Gets a PdfExtGState with the key 'ca' set to the specified alpha value.
/// </summary>
public PdfExtGState GetExtGState(XColor strokeColor, XColor nonStrokeColor)
{
if (strokeColor.IsEmpty)
{
}
else if (nonStrokeColor.IsEmpty)
{
}
else
{
}
return null;
//string key = MakeKey(alpha);
//PdfExtGState extGState = this.nonStrokeAlphaValues[key] as PdfExtGState;
//if (extGState == null)
//{
// extGState = new PdfExtGState(this.document);
// extGState.Elements[PdfExtGState.Keys.ca] = new PdfReal(alpha);
//
// this.nonStrokeAlphaValues[key] = extGState;
//}
//return extGState;
}
string MakeKey(double alpha)
{
return ((int)(1000 * alpha)).ToString();
}
/// <summary>
/// Maps from alpha values (range "0" to "1000") to PdfExtGState objects.
/// </summary>
Hashtable alphaValues = new Hashtable();
Hashtable strokeAlphaValues = new Hashtable();
Hashtable nonStrokeAlphaValues = new Hashtable();
}
}
#endif
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