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crates/typst-cli/src/args.rs

@@ -471,6 +471,7 @@ display_possible_values!(DiagnosticFormat);
 #[derive(Debug, Copy, Clone, Eq, PartialEq, ValueEnum)]
 pub enum Feature {
     Html,
+    PdfEmbedding
 }
 
 display_possible_values!(Feature);

crates/typst-cli/src/world.rs

@@ -117,6 +117,7 @@ impl SystemWorld {
                 .iter()
                 .map(|&feature| match feature {
                     Feature::Html => typst::Feature::Html,
+                    Feature::PdfEmbedding => typst::Feature::PdfEmbedding
                 })
                 .collect();
 

crates/typst-library/src/lib.rs

@@ -237,6 +237,7 @@ impl FromIterator<Feature> for Features {
 #[non_exhaustive]
 pub enum Feature {
     Html,
+    PdfEmbedding
 }
 
 /// A group of related standard library definitions.

crates/typst-library/src/visualize/image/mod.rs

@@ -2,6 +2,7 @@
 
 mod raster;
 mod svg;
+mod pdf;
 
 pub use self::raster::{
     ExchangeFormat, PixelEncoding, PixelFormat, RasterFormat, RasterImage,
@@ -468,11 +469,21 @@ impl ImageFormat {
         if is_svg(data) {
             return Some(Self::Vector(VectorFormat::Svg));
         }
+        
+        if is_pdf(data) {
+            return Some(Self::Vector(VectorFormat::Pdf))
+        }
 
         None
     }
 }
 
+/// Checks whether the data looks like a PDF file.
+fn is_pdf(data: &[u8]) -> bool {
+    let head = &data[..data.len().min(2048)];
+    memchr::memmem::find(head, b"%PDF-").is_some()
+}
+
 /// Checks whether the data looks like an SVG or a compressed SVG.
 fn is_svg(data: &[u8]) -> bool {
     // Check for the gzip magic bytes. This check is perhaps a bit too
@@ -493,6 +504,8 @@ fn is_svg(data: &[u8]) -> bool {
 pub enum VectorFormat {
     /// The vector graphics format of the web.
     Svg,
+    /// The PDF graphics format.
+    Pdf,
 }
 
 impl<R> From<R> for ImageFormat

crates/typst-library/src/visualize/image/pdf.rs

@@ -0,0 +1,6 @@
+use std::sync::Arc;
+use crate::foundations::Bytes;
+
+/// A PDF image.
+#[derive(Clone, Hash)]
+pub struct PdfImage(Bytes);