First commit, before upgrading winit to version 28.1

1 files changed, 40 insertions, 0 deletions

diff --git a/src/render_request.rs b/src/render_request.rs
new file mode 100644
index 0000000..f336dfc
--- /dev/null
+++ b/src/render_request.rs
@@ -0,0 +1,40 @@
+use crate::*;
+use std::ops::*;
+
+/// A request to the window manager for a render pass to be run.
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub enum RenderRequest {
+    /// A render is not required.
+    None,
+    /// A render is required.
+    Render(RenderHint),
+}
+
+impl RenderRequest {
+    pub const NONE:   RenderRequest = RenderRequest::None;
+    pub const UPDATE: RenderRequest = RenderRequest::Render(RenderHint::Update);
+    pub const REDRAW: RenderRequest = RenderRequest::Render(RenderHint::Redraw);
+
+    pub fn is_none(&self) -> bool { *self == RenderRequest::NONE }
+    pub fn is_some(&self) -> bool { *self != RenderRequest::None }
+    pub fn is_update(&self) -> bool { *self == RenderRequest::UPDATE }
+    pub fn is_redraw(&self) -> bool { *self == RenderRequest::REDRAW }
+}
+
+impl BitAnd for RenderRequest {
+    type Output = RenderRequest;
+    fn bitand(self, other: RenderRequest) -> Self::Output {
+        use RenderRequest::*;
+        match (self, other) {
+            (None, req)  => req,
+            (req, None)  => req,
+            (Render(a), Render(b)) => Render(a & b),
+        }
+    }
+}
+
+impl BitAndAssign for RenderRequest {
+    fn bitand_assign(&mut self, other: RenderRequest) {
+        *self = *self & other;
+    }
+}