red component of the color
green component of the color
blue component of the color
alpha component of the color
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 cairo_pattern_t corresponding to a translucent color. The color components are floating point numbers in the range 0 to 1. If the values passed in are outside that range, they will be clamped. Since 1.0