ferroui_base/rendering/composition/drawing/
i_render_data_visitor.rs

1use crate::media::{BoxShadows, IBrush, IPen, RenderOptions, TextOptions};
2use crate::media::imaging::BitmapBlendingMode;
3use crate::platform::{IGeometryImpl, IGlyphRunImpl};
4use crate::rendering::scene_graph::ICustomDrawOperation;
5use crate::{Matrix, Point, Rect, RoundedRect};
6use std::sync::Arc;
7
8/// Walks the operations of a render data stream. A push returns a scope
9/// value that is handed back to `on_pop` when the matching pop is reached.
10pub trait IRenderDataVisitor {
11    type Scope;
12
13    /// Whether the walk should end early.
14    fn stop_visiting(&self) -> bool;
15
16    fn on_draw_line(&mut self, server_pen: Option<&dyn IPen>, client_pen: Option<&dyn IPen>, p1: Point, p2: Point);
17    fn on_draw_rectangle(
18        &mut self,
19        server_brush: Option<&dyn IBrush>,
20        server_pen: Option<&dyn IPen>,
21        client_pen: Option<&dyn IPen>,
22        rect: RoundedRect,
23        box_shadows: &BoxShadows,
24    );
25    fn on_draw_ellipse(
26        &mut self,
27        server_brush: Option<&dyn IBrush>,
28        server_pen: Option<&dyn IPen>,
29        client_pen: Option<&dyn IPen>,
30        rect: Rect,
31    );
32    fn on_draw_geometry(
33        &mut self,
34        server_brush: Option<&dyn IBrush>,
35        server_pen: Option<&dyn IPen>,
36        client_pen: Option<&dyn IPen>,
37        geometry: Option<&Arc<dyn IGeometryImpl>>,
38    );
39    fn on_draw_glyph_run(&mut self, server_brush: Option<&dyn IBrush>, glyph_run: Option<&std::sync::Arc<dyn IGlyphRunImpl>>);
40    fn on_draw_bitmap(&mut self, bitmap: Option<&std::sync::Arc<crate::platform::SharedBitmapImpl>>, opacity: f64, source_rect: Rect, dest_rect: Rect);
41    fn on_draw_custom(&mut self, operation: Option<&std::sync::Arc<dyn ICustomDrawOperation>>);
42
43    fn on_push_clip(&mut self, clip: RoundedRect) -> Self::Scope;
44    fn on_push_geometry_clip(&mut self, geometry: Option<&Arc<dyn IGeometryImpl>>) -> Self::Scope;
45    fn on_push_opacity(&mut self, opacity: f64) -> Self::Scope;
46    fn on_push_opacity_mask(&mut self, brush: Option<&dyn IBrush>, bounds: Rect) -> Self::Scope;
47    fn on_push_transform(&mut self, matrix: Matrix) -> Self::Scope;
48    fn on_push_render_options(&mut self, options: RenderOptions) -> Self::Scope;
49    fn on_push_text_options(&mut self, options: TextOptions) -> Self::Scope;
50    fn on_push_effect(&mut self, effect: Option<&std::sync::Arc<dyn crate::media::IImmutableEffect>>, bounds: Rect) -> Self::Scope;
51
52    /// A blend group changes neither geometric bounds nor hit geometry. The
53    /// default retains that behavior for existing analytical visitors; replay
54    /// visitors override it to preserve isolation and the requested blend.
55    fn on_push_compositing_layer(&mut self, _blend: BitmapBlendingMode, opacity: f64, _bounds: Rect) -> Self::Scope {
56        self.on_push_opacity(opacity)
57    }
58
59    fn on_pop(&mut self, scope: Self::Scope);
60}
ferroui_base/rendering/composition/drawing/i_render_data_visitor.rs

ferroui_base/rendering/composition/drawing/
i_render_data_visitor.rs
