all: split reusable components into workspace crates

src/gfx_apis/vulkan/renderer.rs

@@ -2871,7 +2871,7 @@ impl ColorTransforms {
         mut color: Color,
     ) -> Color {
         if let Some(ct) = self.get_or_create(src, dst, intent) {
-            color = ct.matrix * color;
+            color = apply_color_matrix(ct.matrix, color);
         };
         color
     }
@@ -2896,6 +2896,25 @@ impl ColorTransforms {
     }
 }
 
+fn apply_color_matrix(matrix: ColorMatrix, color: Color) -> Color {
+    let mut rgba = color.to_array(Eotf::Linear);
+    let a = rgba[3];
+    if a < 1.0 && a > 0.0 {
+        for c in &mut rgba[..3] {
+            *c /= a;
+        }
+    }
+    let [r, g, b] = matrix * [rgba[0] as f64, rgba[1] as f64, rgba[2] as f64];
+    Color::new(
+        Eotf::Linear,
+        AlphaMode::Straight,
+        r as f32,
+        g as f32,
+        b as f32,
+        a,
+    )
+}
+
 #[derive(Default)]
 struct EotfArgsCache {
     map: AHashMap<(EotfCacheKey, bool), EotfArg>,