Don't round SVG size (#3415)

crates/typst-pdf/src/image.rs

@@ -18,7 +18,7 @@ pub fn deferred_image(image: Image) -> Deferred<EncodedImage> {
     Deferred::new(move || match image.kind() {
         ImageKind::Raster(raster) => {
             let raster = raster.clone();
-            let (width, height) = (image.width(), image.height());
+            let (width, height) = (raster.width(), raster.height());
             let (data, filter, has_color) = encode_raster_image(&raster);
             let icc = raster.icc().map(deflate);
 

crates/typst-render/src/lib.rs

@@ -352,7 +352,7 @@ fn render_bitmap_glyph(
     // and maybe also for Noto Color Emoji. And: Is the size calculation
     // correct?
     let h = text.size;
-    let w = (image.width() as f64 / image.height() as f64) * h;
+    let w = (image.width() / image.height()) * h;
     let dx = (raster.x as f32) / (image.width() as f32) * size;
     let dy = (raster.y as f32) / (image.height() as f32) * size;
     render_image(
@@ -742,7 +742,7 @@ fn scaled_texture(image: &Image, w: u32, h: u32) -> Option<Arc<sk::Pixmap>> {
     let mut pixmap = sk::Pixmap::new(w, h)?;
     match image.kind() {
         ImageKind::Raster(raster) => {
-            let downscale = w < image.width();
+            let downscale = w < raster.width();
             let filter =
                 if downscale { FilterType::Lanczos3 } else { FilterType::CatmullRom };
             let buf = raster.dynamic().resize(w, h, filter);

crates/typst-svg/src/lib.rs

@@ -409,8 +409,8 @@ impl SVGRenderer {
 
         let glyph_hash = hash128(&(&text.font, id));
         let id = self.glyphs.insert_with(glyph_hash, || {
-            let width = image.width() as f64;
-            let height = image.height() as f64;
+            let width = image.width();
+            let height = image.height();
             let url = convert_image_to_base64_url(&image);
             let ts = Transform::translate(
                 Abs::pt(bitmap_x_offset),
@@ -426,7 +426,7 @@ impl SVGRenderer {
         // The image is stored with the height of `image.height()`, but we want
         // to render it with a height of `target_height`. So we need to scale
         // it.
-        let scale_factor = target_height / image.height() as f64;
+        let scale_factor = target_height / image.height();
         self.xml.write_attribute("x", &(x_offset / scale_factor));
         self.xml.write_attribute_fmt(
             "transform",

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

@@ -379,17 +379,17 @@ impl Image {
     }
 
     /// The width of the image in pixels.
-    pub fn width(&self) -> u32 {
+    pub fn width(&self) -> f64 {
         match &self.0.kind {
-            ImageKind::Raster(raster) => raster.width(),
+            ImageKind::Raster(raster) => raster.width() as f64,
             ImageKind::Svg(svg) => svg.width(),
         }
     }
 
     /// The height of the image in pixels.
-    pub fn height(&self) -> u32 {
+    pub fn height(&self) -> f64 {
         match &self.0.kind {
-            ImageKind::Raster(raster) => raster.height(),
+            ImageKind::Raster(raster) => raster.height() as f64,
             ImageKind::Svg(svg) => svg.height(),
         }
     }

crates/typst/src/visualize/image/svg.rs

@@ -20,7 +20,7 @@ pub struct SvgImage(Arc<Repr>);
 /// The internal representation.
 struct Repr {
     data: Bytes,
-    size: Axes<u32>,
+    size: Axes<f64>,
     font_hash: u128,
     tree: sync::SyncTree,
 }
@@ -76,12 +76,12 @@ impl SvgImage {
     }
 
     /// The SVG's width in pixels.
-    pub fn width(&self) -> u32 {
+    pub fn width(&self) -> f64 {
         self.0.size.x
     }
 
     /// The SVG's height in pixels.
-    pub fn height(&self) -> u32 {
+    pub fn height(&self) -> f64 {
         self.0.size.y
     }
 
@@ -222,8 +222,8 @@ where
 }
 
 /// The ceiled pixel size of an SVG.
-fn tree_size(tree: &usvg::Tree) -> Axes<u32> {
-    Axes::new(tree.size.width().ceil() as u32, tree.size.height().ceil() as u32)
+fn tree_size(tree: &usvg::Tree) -> Axes<f64> {
+    Axes::new(tree.size.width() as f64, tree.size.height() as f64)
 }
 
 /// Format the user-facing SVG decoding error message.