Scale XObject to (1,1) dimensions.

Cargo.toml

@@ -14,5 +14,5 @@ system-fonts = ["usvg/system-fonts", "usvg/memmap-fonts"]
 [dependencies]
 image = { version = "0.23", default-features = false, optional = true }
 miniz_oxide = "0.4"
-pdf-writer = { git = "https://github.com/typst/pdf-writer", rev = "141aa01" }
+pdf-writer = { git = "https://github.com/typst/pdf-writer", rev = "e1ec200" }
 usvg = { version = "0.19", default-features = false }

src/lib.rs

@@ -251,7 +251,10 @@ pub fn convert_tree(tree: &Tree, options: Options) -> Vec<u8> {
 /// Convert a [`usvg` tree](Tree) into a Form XObject that can be used as part
 /// of a larger document.
 ///
-/// This method is intended for use in an existing [`PdfWriter`] workflow.
+/// This method is intended for use in an existing [`PdfWriter`] workflow. It
+/// will always return an XObject with the width and height of one printer's
+/// point, just like an [`ImageXObject`](pdf_writer::writers::ImageXObject)
+/// would.
 ///
 /// The resulting object can be used by registering a name and the `id` with a
 /// page's [`/XObject`](pdf_writer::writers::Resources::x_objects) resources
@@ -281,6 +284,15 @@ pub fn convert_tree_into(
 
     let mut xobject = writer.form_xobject(id, &content);
     xobject.bbox(bbox);
+    xobject.matrix([
+        1.0 / (bbox.x2 - bbox.x1),
+        0.0,
+        0.0,
+        1.0 / (bbox.y2 - bbox.y1),
+        0.0,
+        0.0,
+    ]);
+
     let mut resources = xobject.resources();
     ctx.pop(&mut resources);