This tutorial shows how to burn the annotations from an external XML file to a PDF document in a Python application using the LEADTOOLS SDK.
Overview | |
---|---|
Summary | This tutorial covers how to burn annotations to a PDF file using the LEADDocument class in a Python application. |
Completion Time | 30 minutes |
Visual Studio Project | Download tutorial project (1 KB) |
Platform | Python |
IDE | Visual Studio 2022 |
Runtime Target | Python 3.10 or higher |
Development License | Download LEADTOOLS |
Try it in another language |
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Get familiar with the basic steps of creating a project by reviewing the Add References and Set a License tutorial, before working on the Burn Annotations to a LEADDocument - Python tutorial.
Start with a copy of the project created in the Add References and Set a License tutorial. If you do not have that project, follow the steps in that tutorial to create it.
The references needed depend upon the purpose of the project.
This tutorial requires the following DLLs:
Leadtools.dll
Leadtools.Annotations.Rendering.dll
Leadtools.Document.dll
Leadtools.Document.Converter.dll
For a complete list of which DLL files are required for your application, refer to Files to be Included With Your Application.
The License unlocks the features needed for the project. It must be set before any toolkit function is called. For details, including tutorials for different platforms, refer to Setting a Runtime License.
There are two types of runtime licenses:
With the project created, and the license set, coding can begin.
In the Solution Explorer, open Project-Name.py
and place the following references below the "Add references to LEADTOOLS" comment
# Add references to LEADTOOLS
from leadtools import LibraryLoader
LibraryLoader.add_reference("Leadtools")
from Leadtools import *
LibraryLoader.add_reference("Leadtools.Document")
from Leadtools.Document import *
LibraryLoader.add_reference("Leadtools.Document.Converter")
from Leadtools.Document.Converter import *
LibraryLoader.add_reference("Leadtools.Document.Writer")
from Leadtools.Document.Writer import *
LibraryLoader.add_reference("Leadtools.Annotations.Rendering")
from Leadtools.Annotations.Rendering import *
from System.IO import *
from System import *
Add a new method called burn_annotations(document_file, ann_file)
and call it inside the main()
method under Support.set_license()
.
def main():
Support.set_license(os.path.join(DemosTools.get_root(), "C:/LEADTOOLS23/Support/Common/License"))
pdf_file = r"PDF FILE PATH"
ann_file = r"XML ANNOTATIONS FILE PATH"
burn_annotations(pdf_file, ann_file)
Add the below code to create a new virtual document, add a PDF document to the virtual document, burn annotations, and export the file using the Document Converter.
def burn_annotations(document_file, ann_file):
virtual_document = DocumentFactory.Create(CreateDocumentOptions())
ann_uri = Uri(ann_file)
load_options = LoadDocumentOptions()
load_options.AnnotationsUri = ann_uri
child_document = DocumentFactory.LoadFromFile(document_file, load_options)
virtual_document.Pages.Add(child_document.Pages[0])
doc_converter = DocumentConverter()
doc_writer = DocumentWriter()
doc_converter.SetDocumentWriterInstance(doc_writer)
doc_converter.SetAnnRenderingEngineInstance(AnnDrawRenderingEngine())
job_data = DocumentConverterJobData()
job_data.AnnotationsMode = DocumentConverterAnnotationsMode.Embed
job_data.Document = virtual_document
job_data.OutputDocumentFileName = r"C:\LEADTOOLS23\Resources\Images\BurnAnnotationsDoc.pdf"
job_data.DocumentFormat = Leadtools.Document.Writer.DocumentFormat.Pdf
job = doc_converter.Jobs.CreateJob(job_data)
doc_converter.Jobs.RunJob(job)
for error in job.Errors:
print("There was an error", error.Error)
If you would like to load a document using memory stream, then add the following code to the top of the BurnAnnotations()
method:
stream = File.OpenRead(document_file)
options = LoadDocumentOptions()
options.AnnotationsUri = Uri(ann_file)
document = DocumentFactory.LoadFromStream(stream, options)
print(document.DocumentId)
print("Document loaded")
child_document = document
Run the project by pressing F5, or by selecting Debug -> Start Debugging.
If the steps were followed correctly, the console appears and the application creates a virtual document, adds a PDF document to the virtual document, burns annotations to it, and exports the document to file.
This tutorial showed how to create a new virtual document and burn annotations to it. Also, it covered how to use the LEADDocument
, LoadDocumentOptions
, and DocumentConverter
classes.