Support transparent page fill (#4586)

Co-authored-by: Martin Haug <mhaug@live.de>

1 files changed, 6 insertions, 0 deletions

diff --git a/crates/typst-pdf/src/content.rs b/crates/typst-pdf/src/content.rs
index da9e4ed4..d9830e43 100644
--- a/crates/typst-pdf/src/content.rs
+++ b/crates/typst-pdf/src/content.rs
@@ -36,6 +36,7 @@ use crate::{deflate_deferred, AbsExt, EmExt};
 pub fn build(
     resources: &mut Resources<()>,
     frame: &Frame,
+    fill: Option<Paint>,
     color_glyph_width: Option<f32>,
 ) -> Encoded {
     let size = frame.size();
@@ -53,6 +54,11 @@ pub fn build(
             .post_concat(Transform::translate(Abs::zero(), size.y)),
     );
 
+    if let Some(fill) = fill {
+        let shape = Geometry::Rect(frame.size()).filled(fill);
+        write_shape(&mut ctx, Point::zero(), &shape);
+    }
+
     // Encode the frame into the content stream.
     write_frame(&mut ctx, frame);