pub fn render_scrollbar(
canvas: &mut SkiaCanvas,
direction: ScrollDirection,
viewport_x: f32,
viewport_y: f32,
viewport_w: f32,
viewport_h: f32,
offset: f32,
content_size: f32,
opacity: f32,
)Expand description
Render a scrollbar thumb onto canvas for the given viewport and scroll state.
opacity in 0.0–1.0 controls the thumb alpha (used for the fade-out effect).