first pass of merging in warp (doesn't build)

crates/galaxyui_core/src/fonts_tests.rs

@@ -0,0 +1,42 @@
+use super::*;
+
+#[test]
+fn test_subpixel_alignment_computation() {
+    {
+        // Default case - a non-fractional offset should have an alignment
+        // value of zero.
+        let pos = vec2f(0., 0.);
+        let alignment = SubpixelAlignment::new(pos);
+        assert_eq!(alignment.0, 0);
+    }
+    {
+        // 0.1 rounds down to 0 (not up to 0.33 -> 1)
+        let pos = vec2f(0.1, 0.);
+        let alignment = SubpixelAlignment::new(pos);
+        assert_eq!(alignment.0, 0);
+    }
+    {
+        // y-position doesn't affect computation
+        let pos = vec2f(0.1, 0.33);
+        let alignment = SubpixelAlignment::new(pos);
+        assert_eq!(alignment.0, 0);
+    }
+    {
+        // 0.2 rounds up to 0.33 -> 1
+        let pos = vec2f(0.2, 0.);
+        let alignment = SubpixelAlignment::new(pos);
+        assert_eq!(alignment.0, 1);
+    }
+    {
+        // 0.66 doesn't round, and converts to 2
+        let pos = vec2f(0.66, 0.);
+        let alignment = SubpixelAlignment::new(pos);
+        assert_eq!(alignment.0, 2);
+    }
+    {
+        // 0.9 rounds up to 1.0 -> 0
+        let pos = vec2f(0.9, 0.);
+        let alignment = SubpixelAlignment::new(pos);
+        assert_eq!(alignment.0, 0);
+    }
+}