1 files changed, 72 insertions, 0 deletions
diff --git a/rust/crates/graphics/src/params.rs b/rust/crates/graphics/src/params.rs
new file mode 100644
index 00000000..6c0fedd2
--- /dev/null
+++ b/rust/crates/graphics/src/params.rs
@@ -0,0 +1,72 @@
+use scene::params::{ParamValue, ParamValues};
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum ParamGroup {
+    Stroke,
+}
+
+impl ParamGroup {
+    pub fn as_str(&self) -> &'static str {
+        match self {
+            ParamGroup::Stroke => "stroke",
+        }
+    }
+}
+
+#[derive(Debug, Clone, PartialEq)]
+pub struct SelectOption {
+    pub value: &'static str,
+    pub label: &'static str,
+}
+
+#[derive(Debug, Clone, PartialEq)]
+pub enum ParamDefinition {
+    Number {
+        key: &'static str,
+        label: &'static str,
+        group: Option<ParamGroup>,
+        default: f64,
+        min: f64,
+        max: Option<f64>,
+        step: f64,
+        short_label: Option<&'static str>,
+    },
+    Color {
+        key: &'static str,
+        label: &'static str,
+        group: Option<ParamGroup>,
+        default: &'static str,
+    },
+    Select {
+        key: &'static str,
+        label: &'static str,
+        group: Option<ParamGroup>,
+        default: &'static str,
+        options: &'static [SelectOption],
+    },
+}
+
+impl ParamDefinition {
+    pub fn key(&self) -> &'static str {
+        match self {
+            ParamDefinition::Number { key, .. } => key,
+            ParamDefinition::Color { key, .. } => key,
+            ParamDefinition::Select { key, .. } => key,
+        }
+    }
+
+    pub fn default_value(&self) -> ParamValue {
+        match self {
+            ParamDefinition::Number { default, .. } => ParamValue::Number(*default),
+            ParamDefinition::Color { default, .. } => ParamValue::String((*default).to_string()),
+            ParamDefinition::Select { default, .. } => ParamValue::String((*default).to_string()),
+        }
+    }
+}
+
+pub fn build_default_param_values(params: &[ParamDefinition]) -> ParamValues {
+    params
+        .iter()
+        .map(|param| (param.key().to_string(), param.default_value()))
+        .collect()
+}