x coordinate for the center of the start circle
y coordinate for the center of the start circle
radius of the start circle
x coordinate for the center of the end circle
y coordinate for the center of the end circle
radius of the end circle
the newly created cairo_pattern_t if successful, or an error pattern in case of no memory. The caller owns the returned object and should call Pattern.destroy when finished with it. This function will always return a valid pointer, but if an error occurred the pattern status will be set to an error. To inspect the status of a pattern use Pattern.status.
Creates a new radial gradient cairo_pattern_t between the two circles defined by (cx0, cy0, radius0) and (cx1, cy1, radius1). Before using the gradient pattern, a number of color stops should be defined using Pattern.addColorStopRgb or Pattern.addColorStopRgba. Note: The coordinates here are in pattern space. For a new pattern, pattern space is identical to user space, but the relationship between the spaces can be changed with Pattern.setMatrix. Since 1.0