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Diffstat (limited to '')
| -rw-r--r-- | wgpu/src/widget/canvas/frame.rs | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/wgpu/src/widget/canvas/frame.rs b/wgpu/src/widget/canvas/frame.rs index 1c4a038a..5262ab4e 100644 --- a/wgpu/src/widget/canvas/frame.rs +++ b/wgpu/src/widget/canvas/frame.rs @@ -120,6 +120,43 @@ impl Frame { let _ = result.expect("Tessellate path"); } + /// Draws an axis-aligned rectangle given its top-left corner coordinate and + /// its `Size` on the [`Frame`] by filling it with the provided style. + /// + /// [`Frame`]: struct.Frame.html + pub fn fill_rectangle( + &mut self, + top_left: Point, + size: Size, + fill: impl Into<Fill>, + ) { + use lyon::tessellation::{BuffersBuilder, FillOptions}; + + let mut buffers = BuffersBuilder::new( + &mut self.buffers, + FillVertex(match fill.into() { + Fill::Color(color) => color.into_linear(), + }), + ); + + let top_left = + self.transforms.current.raw.transform_point( + lyon::math::Point::new(top_left.x, top_left.y), + ); + + let size = + self.transforms.current.raw.transform_vector( + lyon::math::Vector::new(size.width, size.height), + ); + + let _ = lyon::tessellation::basic_shapes::fill_rectangle( + &lyon::math::Rect::new(top_left, size.into()), + &FillOptions::default(), + &mut buffers, + ) + .expect("Fill rectangle"); + } + /// Draws the stroke of the given [`Path`] on the [`Frame`] with the /// provided style. /// @@ -283,6 +320,20 @@ impl Frame { struct FillVertex([f32; 4]); +impl lyon::tessellation::BasicVertexConstructor<triangle::Vertex2D> + for FillVertex +{ + fn new_vertex( + &mut self, + position: lyon::math::Point, + ) -> triangle::Vertex2D { + triangle::Vertex2D { + position: [position.x, position.y], + color: self.0, + } + } +} + impl lyon::tessellation::FillVertexConstructor<triangle::Vertex2D> for FillVertex { |