Method Cairo.Context()->set_source_rgba()

Method set_source_rgba

void set_source_rgba(float red, float green, float blue, float alpha)

Description

Sets the source pattern to a translucent color. This color will then be used for any subsequent drawing operation until a new source pattern is set.

The color and alpha components are floating point numbers in the range 0 to 1. If the values passed in are outside that range, they will be clamped.

Note that the color and alpha values are not premultiplied.

The default source pattern is opaque black, (that is, it is equivalent to set_source_rgba(0.0, 0.0, 0.0, 1.0)).

Parameter red

red component of color

Parameter green

green component of color

Parameter blue

blue component of color

Parameter alpha

alpha component of color