sparse tests: Add emboldened glyph snapshot

Signed-off-by: Nico Burns <nico@nicoburns.com>

glifo/src/glyph.rs

diff --git a/glifo/src/glyph.rs b/glifo/src/glyph.rs
index c948d47..1ebfe0f 100644
--- a/glifo/src/glyph.rs
+++ b/glifo/src/glyph.rs
@@ -1653,6 +1653,7 @@
     hint: bool,
 }
 
+#[inline(always)]
 fn join_bits(join: Join) -> u8 {
     match join {
         Join::Bevel => 0,
@@ -1665,6 +1666,7 @@
     clippy::cast_possible_truncation,
     reason = "Cache keys intentionally store embolden parameters at f32 precision."
 )]
+#[inline(always)]
 fn f32_bits(value: f64) -> u32 {
     (value as f32).to_bits()
 }

sparse_strips/vello_sparse_tests/snapshots/glyphs_emboldened.png

diff --git a/sparse_strips/vello_sparse_tests/snapshots/glyphs_emboldened.png b/sparse_strips/vello_sparse_tests/snapshots/glyphs_emboldened.png
new file mode 100644
index 0000000..5b4de08
--- /dev/null
+++ b/sparse_strips/vello_sparse_tests/snapshots/glyphs_emboldened.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:89f57ab8140371353cc2f4ed1019be299c899f6d0ec82c52204cfa334c31f94c
+size 9629

sparse_strips/vello_sparse_tests/tests/glyph.rs

diff --git a/sparse_strips/vello_sparse_tests/tests/glyph.rs b/sparse_strips/vello_sparse_tests/tests/glyph.rs
index 75fb820..b0ba59d 100644
--- a/sparse_strips/vello_sparse_tests/tests/glyph.rs
+++ b/sparse_strips/vello_sparse_tests/tests/glyph.rs
@@ -7,12 +7,12 @@
 #[cfg(target_os = "macos")]
 use crate::util::layout_glyphs_apple_color_emoji;
 use crate::util::{layout_glyphs_noto_cbtf, layout_glyphs_noto_colr, layout_glyphs_roboto};
-use glifo::Glyph;
+use glifo::{FontEmbolden, Glyph};
 use std::f64::consts::FRAC_PI_4;
 use std::iter;
 use std::sync::Arc;
 use vello_common::color::palette::css::{BLACK, BLUE, GREEN, REBECCA_PURPLE};
-use vello_common::kurbo::{Affine, Stroke};
+use vello_common::kurbo::{Affine, Diagonal2, Stroke};
 use vello_common::peniko::{Blob, FontData};
 use vello_dev_macros::vello_test;
 
@@ -126,6 +126,28 @@
         .fill_glyphs(glyphs.into_iter());
 }
 
+#[vello_test(width = 760, height = 140)]
+fn glyphs_emboldened(ctx: &mut impl Renderer) {
+    let font_size: f32 = 44_f32;
+    let (font, glyphs) = layout_glyphs_roboto("this is regular and emboldened text", font_size);
+
+    ctx.set_transform(Affine::translate((0., f64::from(font_size))));
+    ctx.set_paint(REBECCA_PURPLE.with_alpha(0.5));
+    ctx.glyph_run(&font)
+        .font_size(font_size)
+        .hint(true)
+        .fill_glyphs(glyphs.into_iter());
+
+    let (font, glyphs) = layout_glyphs_roboto("this is regular and emboldened text", font_size);
+
+    ctx.set_transform(Affine::translate((0., f64::from(font_size) + 58.0)));
+    ctx.glyph_run(&font)
+        .font_size(font_size)
+        .font_embolden(FontEmbolden::new(Diagonal2::new(1.0, 1.0)))
+        .hint(true)
+        .fill_glyphs(glyphs.into_iter());
+}
+
 #[vello_test(width = 300, height = 70, glyph)]
 fn glyphs_stroked(ctx: &mut impl Renderer, enable_caching: bool) {
     let font_size: f32 = 50_f32;

vello_encoding/src/glyph_cache.rs

diff --git a/vello_encoding/src/glyph_cache.rs b/vello_encoding/src/glyph_cache.rs
index 2a6948b..336c9a3 100644
--- a/vello_encoding/src/glyph_cache.rs
+++ b/vello_encoding/src/glyph_cache.rs
@@ -254,6 +254,7 @@
     hint: bool,
 }
 
+#[inline(always)]
 fn join_bits(join: Join) -> u8 {
     match join {
         Join::Bevel => 0,
@@ -266,6 +267,7 @@
     clippy::cast_possible_truncation,
     reason = "Cache keys intentionally store embolden parameters at f32 precision."
 )]
+#[inline(always)]
 fn f32_bits(value: f64) -> u32 {
     (value as f32).to_bits()
 }