diff options
Diffstat (limited to 'core/src/renderer.rs')
| -rw-r--r-- | core/src/renderer.rs | 28 |
1 files changed, 26 insertions, 2 deletions
diff --git a/core/src/renderer.rs b/core/src/renderer.rs index 47b09d32..406b33f3 100644 --- a/core/src/renderer.rs +++ b/core/src/renderer.rs @@ -11,17 +11,41 @@ use crate::{ /// A component that can be used by widgets to draw themselves on a screen. pub trait Renderer { + /// Starts recording a new layer. + fn start_layer(&mut self); + + /// Ends recording a new layer. + /// + /// The new layer will clip its contents to the provided `bounds`. + fn end_layer(&mut self, bounds: Rectangle); + /// Draws the primitives recorded in the given closure in a new layer. /// /// The layer will clip its contents to the provided `bounds`. - fn with_layer(&mut self, bounds: Rectangle, f: impl FnOnce(&mut Self)); + fn with_layer(&mut self, bounds: Rectangle, f: impl FnOnce(&mut Self)) { + self.start_layer(); + f(self); + self.end_layer(bounds); + } + + /// Starts recording with a new [`Transformation`]. + fn start_transformation(&mut self); + + /// Ends recording a new layer. + /// + /// The new layer will clip its contents to the provided `bounds`. + fn end_transformation(&mut self, transformation: Transformation); /// Applies a [`Transformation`] to the primitives recorded in the given closure. fn with_transformation( &mut self, transformation: Transformation, f: impl FnOnce(&mut Self), - ); + ) { + self.start_transformation(); + f(self); + self.end_transformation(transformation); + } /// Applies a translation to the primitives recorded in the given closure. fn with_translation( |