grayscale

Converts the PDF-document to black and white.

pub fn grayscale(&self) -> Result<(), PdfError>

Arguments

Returns

• Ok(()) - if the operation succeeds
• Err(PdfError) - if the operation fails

Example

use asposepdf::Document;

fn main() -> Result<(), Box<dyn std::error::Error>> {
    // Open a PDF-document with filename
    let pdf = Document::open("sample.pdf")?;

    // Convert PDF-document to black and white
    pdf.grayscale()?;

    // Save the previously opened PDF-document with new filename
    pdf.save_as("sample_grayscale.pdf")?;

    Ok(())
}