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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 tiling pattern dictionary.
/// </summary>
public sealed class PdfTilingPattern : PdfDictionaryWithContentStream
{
/// <summary>
/// Initializes a new instance of the <see cref="PdfShadingPattern"/> class.
/// </summary>
public PdfTilingPattern(PdfDocument document)
: base(document)
{
Elements.SetName(Keys.Type, "/Pattern");
Elements[Keys.PatternType] = new PdfInteger(1);
}
///// <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) + "]");
//}
/// <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 1 for a tiling pattern.
/// </summary>
[KeyInfo(KeyType.Integer | KeyType.Required)]
public const string PatternType = "/PatternType";
/// <summary>
/// (Required) A code that determines how the color of the pattern cell is to be specified:
/// 1: Colored tiling pattern. The patterns content stream specifies the colors used to
/// paint the pattern cell. When the content stream begins execution, the current color
/// is the one that was initially in effect in the patterns parent content stream.
/// 2: Uncolored tiling pattern. The patterns content stream does not specify any color
/// information. Instead, the entire pattern cell is painted with a separately specified color
/// each time the pattern is used. Essentially, the content stream describes a stencil
/// through which the current color is to be poured. The content stream must not invoke
/// operators that specify colors or other color-related parameters in the graphics state;
/// otherwise, an error occurs. The content stream may paint an image mask, however,
/// since it does not specify any color information.
/// </summary>
[KeyInfo(KeyType.Integer | KeyType.Required)]
public const string PaintType = "/PaintType";
/// <summary>
/// (Required) A code that controls adjustments to the spacing of tiles relative to the device
/// pixel grid:
/// 1: Constant spacing. Pattern cells are spaced consistentlythat is, by a multiple of a
/// device pixel. To achieve this, the application may need to distort the pattern cell slightly
/// by making small adjustments to XStep, YStep, and the transformation matrix. The amount
/// of distortion does not exceed 1 device pixel.
/// 2: No distortion. The pattern cell is not distorted, but the spacing between pattern cells
/// may vary by as much as 1 device pixel, both horizontally and vertically, when the pattern
/// is painted. This achieves the spacing requested by XStep and YStep on average but not
/// necessarily for each individual pattern cell.
/// 3: Constant spacing and faster tiling. Pattern cells are spaced consistently as in tiling
/// type 1 but with additional distortion permitted to enable a more efficient implementation.
/// </summary>
[KeyInfo(KeyType.Integer | KeyType.Required)]
public const string TilingType = "/TilingType";
/// <summary>
/// (Required) An array of four numbers in the pattern coordinate system giving the
/// coordinates of the left, bottom, right, and top edges, respectively, of the pattern
/// cells bounding box. These boundaries are used to clip the pattern cell.
/// </summary>
[KeyInfo(KeyType.Rectangle | KeyType.Optional)]
public const string BBox = "/BBox";
/// <summary>
/// (Required) The desired horizontal spacing between pattern cells, measured in the
/// pattern coordinate system.
/// </summary>
[KeyInfo(KeyType.Real | KeyType.Required)]
public const string XStep = "/XStep";
/// <summary>
/// (Required) The desired vertical spacing between pattern cells, measured in the pattern
/// coordinate system. Note that XStep and YStep may differ from the dimensions of the
/// pattern cell implied by the BBox entry. This allows tiling with irregularly shaped figures.
/// XStep and YStep may be either positive or negative but not zero.
/// </summary>
[KeyInfo(KeyType.Real | KeyType.Required)]
public const string YStep = "/YStep";
/// <summary>
/// (Required) A resource dictionary containing all of the named resources required by
/// the patterns content stream (see Section 3.7.2, Resource Dictionaries).
/// </summary>
[KeyInfo(KeyType.Dictionary | KeyType.Required)]
public new const string Resources = "/Resources";
/// <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>
/// 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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