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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.Text;
using System.IO;
#if GDI
using System.Drawing;
using System.Drawing.Imaging;
#endif
#if WPF
using System.Windows.Media;
#endif
using PdfSharp.Drawing;
using PdfSharp.Fonts.TrueType;
using PdfSharp.Internal;
using PdfSharp.Pdf.Internal;
namespace PdfSharp.Pdf.Advanced
{
/// <summary>
/// Represents a shading pattern dictionary.
/// </summary>
public sealed class PdfShadingPattern : PdfDictionaryWithContentStream
{
/// <summary>
/// Initializes a new instance of the <see cref="PdfShadingPattern"/> class.
/// </summary>
public PdfShadingPattern(PdfDocument document)
: base(document)
{
Elements.SetName(Keys.Type, "/Pattern");
Elements[Keys.PatternType] = new PdfInteger(2);
}
/// <summary>
/// Setups the shading pattern from the specified brush.
/// </summary>
public void SetupFromBrush(XLinearGradientBrush brush, XMatrix matrix)
{
if (brush == null)
throw new ArgumentNullException("brush");
PdfShading shading = new PdfShading(this.document);
shading.SetupFromBrush(brush);
Elements[Keys.Shading] = shading;
//Elements[Keys.Matrix] = new PdfLiteral("[" + PdfEncoders.ToString(matrix) + "]");
Elements.SetMatrix(Keys.Matrix, matrix);
}
/// <summary>
/// Common keys for all streams.
/// </summary>
internal sealed new class Keys : PdfDictionaryWithContentStream.Keys
{
/// <summary>
/// (Optional) The type of PDF object that this dictionary describes; if present,
/// must be Pattern for a pattern dictionary.
/// </summary>
[KeyInfo(KeyType.Name | KeyType.Required)]
public const string Type = "/Type";
/// <summary>
/// (Required) A code identifying the type of pattern that this dictionary describes;
/// must be 2 for a shading pattern.
/// </summary>
[KeyInfo(KeyType.Integer | KeyType.Required)]
public const string PatternType = "/PatternType";
/// <summary>
/// (Required) A shading object (see below) defining the shading patterns gradient fill.
/// </summary>
[KeyInfo(KeyType.Dictionary | KeyType.Required)]
public const string Shading = "/Shading";
/// <summary>
/// (Optional) An array of six numbers specifying the pattern matrix.
/// Default value: the identity matrix [1 0 0 1 0 0].
/// </summary>
[KeyInfo(KeyType.Array | KeyType.Optional)]
public const string Matrix = "/Matrix";
/// <summary>
/// (Optional) A graphics state parameter dictionary containing graphics state parameters
/// to be put into effect temporarily while the shading pattern is painted. Any parameters
/// that are not so specified are inherited from the graphics state that was in effect
/// at the beginning of the content stream in which the pattern is defined as a resource.
/// </summary>
[KeyInfo(KeyType.Dictionary | KeyType.Optional)]
public const string ExtGState = "/ExtGState";
/// <summary>
/// Gets the KeysMeta for these keys.
/// </summary>
internal static DictionaryMeta Meta
{
get
{
if (Keys.meta == null)
Keys.meta = CreateMeta(typeof(Keys));
return Keys.meta;
}
}
static DictionaryMeta meta;
}
/// <summary>
/// Gets the KeysMeta of this dictionary type.
/// </summary>
internal override DictionaryMeta Meta
{
get { return Keys.Meta; }
}
}
}
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