feat: Pass affine transform coefficients

crates/flare-kernel/src/transforms.rs

@@ -1,8 +1,32 @@
+#[derive(Copy, Clone, Default, Debug, bytemuck::Pod, bytemuck::Zeroable)]
+#[repr(C)]
+pub struct Coefs {
+    a: f32,
+    b: f32,
+    c: f32,
+    d: f32,
+    e: f32,
+    f: f32,
+}
+
+impl Coefs {
+    pub fn identity() -> Self {
+        Coefs {
+            a: 1.,
+            b: 0.,
+            c: 0.,
+            d: 0.,
+            e: 1.,
+            f: 0.,
+        }
+    }
+}
+
 #[derive(Copy, Clone, Default, Debug, bytemuck::Pod, bytemuck::Zeroable)]
 #[repr(C)]
 pub struct TransformSpec {
-    // pub coefs: glam::Affine2,
+    pub coefs: Coefs,
-    // pub post_coefs: glam::Affine2,
+    pub post_coefs: Coefs,
     pub variation_offset: u32,
     pub variation_count: u32,
 }

crates/flare-lib/src/lib.rs

@@ -2,7 +2,7 @@ extern crate core;
 
 #[cfg(test)]
 pub mod tests {
-    use flare_kernel::{TransformSpec, VariationKind, VariationParams, VariationSpec};
+    use flare_kernel::{Coefs, TransformSpec, VariationKind, VariationParams, VariationSpec};
     use futures::channel::oneshot;
     use futures_executor::block_on;
     use std::default::Default;
@@ -239,8 +239,8 @@ pub mod tests {
     #[test]
     pub fn apply_linear_transform() {
         let transform = TransformSpec {
-            // coefs: glam::Affine2::IDENTITY,
+            coefs: Coefs::identity(),
-            // post_coefs: glam::Affine2::IDENTITY,
+            post_coefs: Coefs::identity(),
             variation_offset: 0,
             variation_count: 1,
         };