> For the complete documentation index, see [llms.txt](https://docs.apryse.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.apryse.com/uwp/get-started/samples/patterntest.md). # Pattern Sample C# code for using Apryse SDK to create various patterns and shadings in PDF files. Sample C# code for using Apryse SDK to create various patterns and shadings in PDF files. Learn more about our [UWP SDK](/core/get-started/frameworks/dotnet.md) and [PDF Editing & Manipulation Library](/core/page-manipulation/manipulation.md). {% tabs %} {% tab title="C#" %} {% code lineNumbers="true" %} ```csharp // // Copyright (c) 2001-2020 by PDFTron Systems Inc. All Rights Reserved. // using System; using System.IO; using System.Threading.Tasks; using Windows.Foundation; using pdftron.Common; using pdftron.PDF; using pdftron.SDF; using PDFNetUniversalSamples.ViewModels; namespace PDFNetSamples { public sealed class PatternTest : Sample { public PatternTest() : base("Pattern", "This example illustrates how to create various PDF patterns and shadings.") { } public override IAsyncAction RunAsync() { return Task.Run(new System.Action(async () => { WriteLine("--------------------------------"); WriteLine("Starting Pattern Test..."); WriteLine("--------------------------------\n"); try { PDFDoc doc = new PDFDoc(); ElementWriter writer = new ElementWriter(); ElementBuilder eb = new ElementBuilder(); // The following sample illustrates how to create and use tiling patterns pdftron.PDF.Page page = doc.PageCreate(); writer.Begin(page); Element element = eb.CreateTextBegin(Font.Create(doc.GetSDFDoc(), FontStandardType1Font.e_times_bold), 1); writer.WriteElement(element); // Begin the text block element = eb.CreateTextRun("G"); element.SetTextMatrix(720, 0, 0, 720, 20, 240); GState gs = element.GetGState(); gs.SetTextRenderMode(GStateTextRenderingMode.e_fill_stroke_text); gs.SetLineWidth(4); // Set the fill color space to the Pattern color space. gs.SetFillColorSpace(ColorSpace.CreatePattern()); gs.SetFillColor(CreateTilingPattern(doc)); writer.WriteElement(element); writer.WriteElement(eb.CreateTextEnd()); // Finish the text block writer.End(); // Save the page doc.PagePushBack(page); //----------------------------------------------- /// The following sample illustrates how to create and use image tiling pattern page = doc.PageCreate(); writer.Begin(page); eb.Reset(); element = eb.CreateRect(0, 0, 612, 794); // Set the fill color space to the Pattern color space. gs = element.GetGState(); gs.SetFillColorSpace(ColorSpace.CreatePattern()); gs.SetFillColor(CreateImageTilingPattern(doc)); element.SetPathFill(true); writer.WriteElement(element); writer.End(); // Save the page doc.PagePushBack(page); //----------------------------------------------- /// The following sample illustrates how to create and use PDF shadings page = doc.PageCreate(); writer.Begin(page); eb.Reset(); element = eb.CreateRect(0, 0, 612, 794); // Set the fill color space to the Pattern color space. gs = element.GetGState(); gs.SetFillColorSpace(ColorSpace.CreatePattern()); gs.SetFillColor(CreateAxialShading(doc)); element.SetPathFill(true); writer.WriteElement(element); writer.End(); // save the page doc.PagePushBack(page); //----------------------------------------------- String output_file_path = Path.Combine(OutputPath, "patterns.pdf"); await doc.SaveAsync(output_file_path, SDFDocSaveOptions.e_remove_unused); doc.Destroy(); WriteLine("Done. Results saved in " + output_file_path); await AddFileToOutputList(output_file_path).ConfigureAwait(false); } catch (Exception e) { WriteLine(GetExceptionMessage(e)); } WriteLine("\n--------------------------------"); WriteLine("Done Pattern Test."); WriteLine("--------------------------------\n"); })).AsAsyncAction(); } PatternColor CreateTilingPattern(PDFDoc doc) { ElementWriter writer = new ElementWriter(); ElementBuilder eb = new ElementBuilder(); // Create a new pattern content stream - a heart. ------------ writer.Begin(doc.GetSDFDoc()); eb.PathBegin(); eb.MoveTo(0, 0); eb.CurveTo(500, 500, 125, 625, 0, 500); eb.CurveTo(-125, 625, -500, 500, 0, 0); Element heart = eb.PathEnd(); heart.SetPathFill(true); // Set heart color to red. heart.GetGState().SetFillColorSpace(ColorSpace.CreateDeviceRGB()); heart.GetGState().SetFillColor(new ColorPt(1, 0, 0)); writer.WriteElement(heart); Obj pattern_dict = writer.End(); // Initialize pattern dictionary. For details on what each parameter represents please // refer to Table 4.22 (Section '4.6.2 Tiling Patterns') in PDF Reference Manual. pattern_dict.PutName("Type", "Pattern"); pattern_dict.PutNumber("PatternType", 1); // TilingType - Constant spacing. pattern_dict.PutNumber("TilingType", 1); // This is a Type1 pattern - A colored tiling pattern. pattern_dict.PutNumber("PaintType", 1); // Set bounding box pattern_dict.PutRect("BBox", -253, 0, 253, 545); // Set the pattern matrix pattern_dict.PutMatrix("Matrix", new Matrix2D(0.04, 0, 0, 0.04, 0, 0)); // Set the desired horizontal and vertical spacing between pattern cells, // measured in the pattern coordinate system. pattern_dict.PutNumber("XStep", 1000); pattern_dict.PutNumber("YStep", 1000); return new PatternColor(pattern_dict); // finished creating the Pattern resource } PatternColor CreateImageTilingPattern(PDFDoc doc) { ElementWriter writer = new ElementWriter(); ElementBuilder eb = new ElementBuilder(); // Create a new pattern content stream - a single bitmap object ---------- writer.Begin(doc.GetSDFDoc()); pdftron.PDF.Image img = pdftron.PDF.Image.Create(doc.GetSDFDoc(), Path.Combine(InputPath, "butterfly.png")); Element img_element = eb.CreateImage(img, 0, 0, img.GetImageWidth(), img.GetImageHeight()); writer.WritePlacedElement(img_element); Obj pattern_dict = writer.End(); // Initialize pattern dictionary. For details on what each parameter represents please // refer to Table 4.22 (Section '4.6.2 Tiling Patterns') in PDF Reference Manual. pattern_dict.PutName("Type", "Pattern"); pattern_dict.PutNumber("PatternType", 1); // TilingType - Constant spacing. pattern_dict.PutNumber("TilingType", 1); // This is a Type1 pattern - A colored tiling pattern. pattern_dict.PutNumber("PaintType", 1); // Set bounding box pattern_dict.PutRect("BBox", -253, 0, 253, 545); // Set the pattern matrix pattern_dict.PutMatrix("Matrix", new Matrix2D(0.3, 0, 0, 0.3, 0, 0)); // Set the desired horizontal and vertical spacing between pattern cells, // measured in the pattern coordinate system. pattern_dict.PutNumber("XStep", 300); pattern_dict.PutNumber("YStep", 300); return new PatternColor(pattern_dict); // finished creating the Pattern resource } PatternColor CreateAxialShading(PDFDoc doc) { // Create a new Shading object ------------ Obj pattern_dict = doc.CreateIndirectDict(); // Initialize pattern dictionary. For details on what each parameter represents // please refer to Tables 4.30 and 4.26 in PDF Reference Manual pattern_dict.PutName("Type", "Pattern"); pattern_dict.PutNumber("PatternType", 2); // 2 stands for shading Obj shadingDict = pattern_dict.PutDict("Shading"); shadingDict.PutNumber("ShadingType", 2); shadingDict.PutName("ColorSpace", "DeviceCMYK"); // Set the coordinates of the axial shading to the output shadingDict.PutRect("Coords", 0, 0, 612, 794); // Set the Functions for the axial shading Obj funct = shadingDict.PutDict("Function"); Obj C0 = funct.PutArray("C0"); C0.PushBackNumber(1); C0.PushBackNumber(0); C0.PushBackNumber(0); C0.PushBackNumber(0); Obj C1 = funct.PutArray("C1"); C1.PushBackNumber(0); C1.PushBackNumber(1); C1.PushBackNumber(0); C1.PushBackNumber(0); Obj domain = funct.PutArray("Domain"); domain.PushBackNumber(0); domain.PushBackNumber(1); funct.PutNumber("FunctionType", 2); funct.PutNumber("N", 1); return new PatternColor(pattern_dict); } } } ``` {% endcode %} {% endtab %} {% endtabs %} --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://docs.apryse.com/uwp/get-started/samples/patterntest.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.