170 lines
8.2 KiB
C#
170 lines
8.2 KiB
C#
#region PDFsharp - A .NET library for processing PDF
|
||
//
|
||
// Authors:
|
||
// Stefan Lange
|
||
//
|
||
// Copyright (c) 2005-2016 empira Software GmbH, Cologne Area (Germany)
|
||
//
|
||
// http://www.PdfSharpCore.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
|
||
|
||
namespace PdfSharpCore.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(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 pattern’s 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 pattern’s parent content stream.
|
||
/// 2: Uncolored tiling pattern. The pattern’s 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 consistently—that 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
|
||
/// cell’s 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 pattern’s 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 { return _meta ?? (_meta = CreateMeta(typeof(Keys))); }
|
||
}
|
||
static DictionaryMeta _meta;
|
||
}
|
||
|
||
/// <summary>
|
||
/// Gets the KeysMeta of this dictionary type.
|
||
/// </summary>
|
||
internal override DictionaryMeta Meta
|
||
{
|
||
get { return Keys.Meta; }
|
||
}
|
||
}
|
||
}
|