Struct AnimationFrameResult 

pub struct AnimationFrameResult {
    pub completed: bool,
    pub area: Option<Rect>,
    pub transform: Option<Mat4>,
    pub opacity: Option<f32>,
    pub clip_area: Option<Rect>,
}

Returned from animation hooks to describe the frame’s visual state.

Fields

completed: bool

Set to true to signal that the animation is finished.

area: Option<Rect>

Override the window’s rectangle for this frame. None leaves it unchanged.

When also setting clip_area, this should carry the window’s final target size so the client receives the correct configure event immediately.

transform: Option<Mat4>

Override the window’s transform matrix for this frame. None leaves it unchanged.

opacity: Option<f32>

Override the window’s opacity for this frame. None leaves it unchanged.

clip_area: Option<Rect>

Set the scissor-clip rectangle for this frame independently from area.

When set, this rectangle is used as the compositor scissor region rather than area, allowing the window surface to be revealed gradually while area carries the final target geometry for the Wayland configure event. This avoids blank space during resize animations.