paintRadialGradient

void paintRadialGradient(harfbuzz.paint_funcs.PaintFuncs funcs,  void *  paintData,  harfbuzz.color_line.ColorLine colorLine,  float  x0,  float  y0,  float  r0,  float  x1,  float  y1,  float  r1)

Perform a "radial-gradient" paint operation.

Parameters

`funcs`	paint functions
`paintData`	associated data passed by the caller
`colorLine`	Color information for the gradient
`x0`	X coordinate of the first circle's center
`y0`	Y coordinate of the first circle's center
`r0`	radius of the first circle
`x1`	X coordinate of the second circle's center
`y1`	Y coordinate of the second circle's center
`r1`	radius of the second circle