Function overlayGrid

Returns (
    ctx: CanvasRenderingContext2D,
    W: number,
    H: number,
    params: Record<string, string>,
) => Promise<void> & {
    measure?: (
        params: Record<string, string>,
    ) => { width: number; height: number };
}

Postprocess function that overlays a grid of icons

• • (
        ctx: CanvasRenderingContext2D,
        W: number,
        H: number,
        params: Record<string, string>,
    ): Promise<void>

  • Execute the post-processing operation

    Parameters

    • ctx: CanvasRenderingContext2D

      Canvas 2D rendering context

    • W: number
    • H: number
    • params: Record<string, string>

      Query parameters from the image request

    Returns Promise<void>

• Optionalmeasure?: (params: Record<string, string>) => { width: number; height: number }

const postprocess = overlayGrid({ icon1: '<svg>...</svg>', icon2: '<svg>...</svg>' });
// Use in registerNamedImageHandlers
Copy