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Начиная с версии 24.2 библиотека Aspose.PDF for .NET позволяет извлекать векторные данные из PDF-файла. Следующий фрагмент кода создаёт новый объект Document, используя некоторые входные данные, инициализирует GraphicsAbsorber (GraphicsAbsorber возвращает векторные данные) для обработки графических элементов, а затем переходит ко второй странице документа для извлечения и анализа этих элементов. Он извлекает различные свойства второго графического элемента, такие как связанные с ним операторы, прямоугольник и положение.
// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void ProcessGraphicsInPDF()
{
// The path to the documents directory
var dataDir = RunExamples.GetDataDir_AsposePdf_WorkingDocuments();
// Open PDF document
using (var document = new Aspose.Pdf.Document(dataDir + "input.pdf"))
{
// Instantiate a new GraphicsAbsorber object to process graphic elements
using (var grAbsorber = new Aspose.Pdf.Vector.GraphicsAbsorber())
{
// Visit the second page of the document to extract graphic elements
grAbsorber.Visit(document.Pages[1]);
// Retrieve the list of graphic elements from the GraphicsAbsorber
var elements = grAbsorber.Elements;
// Access the operators associated with the second graphic element
var operations = elements[1].Operators;
// Retrieve the rectangle associated with the second graphic element
var rectangle = elements[1].Rectangle;
// Get the position of the second graphic element
var position = elements[1].Position;
}
}
}
Для извлечения векторных данных из PDF мы можем использовать SVG-экстрактор:
// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void SaveVectorGraphicsFromPage()
{
// The path to the documents directory
var dataDir = RunExamples.GetDataDir_AsposePdf_WorkingDocuments();
// Open PDF document
using (var document = new Aspose.Pdf.Document(dataDir + "VectorGraphics.pdf"))
{
// Save vector graphics from the first page to an SVG file
document.Pages[1].TrySaveVectorGraphics(dataDir + "VectorGraphics_out.svg");
}
}
// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void ExtractAllSubpathsToImagesSeparately()
{
// The path to the documents directory
var dataDir = RunExamples.GetDataDir_AsposePdf_WorkingDocuments();
// Path to the directory where SVGs will be saved
var svgDirPath = dataDir + "SvgOutput/";
// Create extraction options
var options = new Aspose.Pdf.Vector.SvgExtractionOptions
{
ExtractEverySubPathToSvg = true
};
// Open PDF document
using (var document = new Aspose.Pdf.Document(dataDir + "VectorGraphics.pdf"))
{
// Get the first page of the document
var page = document.Pages[1];
// Create SVG extractor
var extractor = new Aspose.Pdf.Vector.SvgExtractor(options);
// Extract SVGs from the page
extractor.Extract(page, svgDirPath);
}
}
// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void ExtractListOfElementsToSingleImage()
{
// The path to the documents directory
var dataDir = RunExamples.GetDataDir_AsposePdf_WorkingDocuments();
// Initialize the list of graphic elements
var elements = new List<Aspose.Pdf.Vector.GraphicElement>();
// Example: Fill elements list with needed graphic elements (implement your logic here)
// Open PDF document
using (var document = new Aspose.Pdf.Document(dataDir + "VectorGraphics.pdf"))
{
// Get the first page of the document
var page = document.Pages[1];
// Use SvgExtractor to extract SVGs
var svgExtractor = new Aspose.Pdf.Vector.SvgExtractor();
// Extract SVGs from graphic elements on the page
svgExtractor.Extract(elements, page, Path.Combine(dataDir, "SvgOutput", "VectorGraphics_out.svg"));
}
}
// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void ExtractSingleElement()
{
// The path to the documents directory
var dataDir = RunExamples.GetDataDir_AsposePdf_WorkingDocuments();
// Open PDF document
using (var document = new Aspose.Pdf.Document(dataDir + "VectorGraphics.pdf"))
{
// Create a GraphicsAbsorber object to extract graphic elements
var graphicsAbsorber = new Aspose.Pdf.Vector.GraphicsAbsorber();
// Get the first page of the document
var page = document.Pages[1];
// Process the page to extract graphic elements
graphicsAbsorber.Visit(page);
// Extract the graphic element (XFormPlacement) and save it as SVG
var xFormPlacement = graphicsAbsorber.Elements[1] as Aspose.Pdf.Vector.XFormPlacement;
xFormPlacement.Elements[2].SaveToSvg(Path.Combine(dataDir, "SvgOutput", "VectorGraphics_out.svg"));
}
}
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