simple-raster

Draw simple shapes into a Typed Array as a 2d image.

Four funcitons are exported:

* drawBox(buffer, width, x, y, h, w, rot, color, rop)
* drawCircle(buffer, width, x, y, rad, color, rop)
* drawPolygon(buffer, width, points, color, rop)
* drawEllipse(buffer, width, x, y, h, w, rot, color, rop)

Arguments:

* buffer - a TypedArray of data to draw into.
* width - the width of the first dimension buffer.
* x, y - center position of the shape to draw.
* h, w - height and width of the shape.
* color - value or "color" to draw.
* rop - raster operation to perform, either set or add. If undefined "set" is the default.