CANVAS:fill_rect

    CANVAS:fill_rect(x1, y1, x2, y2, color)

Fill a rectangle defined by the bounding area of x1,y2 to x2,y2 with a specific color.

Parameters

Parameter	Type	Description
x1	#number	The x position of the first corner.
y1	#number	The y position of the first corner.
x2	#number	The x position of the second corner.
y2	#number	The y position of the second corner.
color	#number	An RGB color value as an integer value.

Example

    -- Draw three colored bars across the canvas
    function FillRGB(name)
        local canvas = gre.get_canvas(name)
        local size = canvas:get_dimensions()
        local rw = size.width / 3
        canvas:fill_rect(0,    0, rw,   size.height, 0xff0000)
        canvas:fill_rect(rw,   0, 2*rw, size.height, 0x00ff00)
        canvas:fill_rect(2*rw, 0, 3*rw, size.height, 0x0000ff)
    end