Function webrender::prim_store::line_dec::get_line_decoration_size

pub fn get_line_decoration_size(
    rect_size: &LayoutSize,
    orientation: LineOrientation,
    style: LineStyle,
    wavy_line_thickness: f32,
) -> Option<LayoutSize>

Choose the decoration mask tile size for a given line.

Given a line with overall size rect_size and the given orientation, return the dimensions of a single mask tile for the decoration pattern described by style and wavy_line_thickness.

If style is Solid, no mask tile is necessary; return None. The other styles each have their own characteristic periods of repetition, so for each one, this function returns a LayoutSize with the right aspect ratio and whose specific size is convenient for the cs_line_decoration.glsl fragment shader to work with. The shader uses a local coordinate space in which the tile fills a rectangle with one corner at the origin, and with the size this function returns.

The returned size is not necessarily in pixels; device scaling and other concerns can still affect the actual task size.

Regardless of whether orientation is Vertical or Horizontal, the width and height of the returned size are always horizontal and vertical, respectively.