How to Convert LaTeX to PNG Using Aspose.Tex in Python via .NET

convert_latex_to_png_complete_code_example.py

import io
from flask import Flask, request, send_file, abort
import aspose.tex as tex
from aspose.tex.render import ImageRenderOptions

app = Flask(__name__)

@app.route("/render", methods=["POST"])
def render_latex():
    """
    This example demonstrates how to convert LaTeX to PNG using Aspose.TeX in Python.
    It receives a LaTeX string via POST and returns the rendered PNG image.
    """
    latex = request.form.get("latex")
    if not latex:
        abort(400, "Missing LaTeX content in the request.")

    try:
        # Load the LaTeX source into a TeXDocument
        document = tex.TeXDocument(latex)

        # Set rendering options: PNG format, 300 DPI, modest margins
        options = ImageRenderOptions()
        options.image_format = tex.ImageFormat.PNG
        options.dpi = 300
        options.margin = tex.Margin(10, 10, 10, 10)

        # Render to a byte array
        png_bytes = document.render_to_bytes(options)

        # Return the PNG as an HTTP response
        return send_file(
            io.BytesIO(png_bytes),
            mimetype="image/png",
            as_attachment=False,
            download_name="formula.png"
        )
    except Exception as e:
        # Provide a clear error message for troubleshooting
        abort(500, f"Rendering failed: {str(e)}")

if __name__ == "__main__":
    # Run the Flask development server
    app.run(host="0.0.0.0", port=5000, debug=True)