[StackOverflow/rust] Embed document in PDF with Rust pdf-writer crate

### ROOT CAUSE The issue involves embedding a document within a PDF using the Rust `pdf-writer` crate, but the provided code snippet fails to correctly embed the document. The error likely stems from improper handling of the PDF embedding process, such as incorrect use of the crate's API or missing configuration for embedding resources (fonts, images, etc.). ### CODE FIX To embed a document in a PDF using the `pdf-writer` crate, ensure you properly configure the PDF writer to include the embedded content. Here's a corrected example: ```rust use pdf_writer::{Document, Page, ContentStream, PdfWriter}; fn main() -> Result<(), Box> { let mut doc = Document::create()?; let mut writer = PdfWriter::new(&mut doc); // Create a new page and embed the document let page = Page::new(&mut writer, 0, 612, 792); // A4 size let mut content = ContentStream::new(&mut writer); content.begin_text(); content.set_font("Helvetica", 12)?; content.move_to(72.0, 720.0); content.show("Embedded Document"); content.end_text(); // Embed the document (adjust path and parameters as needed) let embedded_file = writer.embed_file("path/to/document.pdf")?; writer.add_embedded_file(embedded_file)?; // Save the PDF writer.write_file("output.pdf")?; Ok(()) } ``` **Key Fixes:** 1. **Proper Embedding:** Use `writer.embed_file()` to embed the document and `writer.add_embedded_file()` to register it. 2. **Font Handling:** Ensure fonts are embedded using `set_font()` with the correct name and size. 3. **Resource Management:** Verify all resources (fonts, images) are embedded to avoid rendering issues. If the issue persists, check the `pdf-writer` crate's documentation for specific embedding requirements and ensure the embedded document is compatible with the PDF specification.