cairoPatternCreateRadial {RGtk2}R Documentation

cairoPatternCreateRadial

Description

Creates a new radial gradient cairo_pattern_t between the two circles defined by (x0, y0, c0) and (x1, y1, c0). Before using the gradient pattern, a number of color stops should be defined using cairoPatternAddColorStopRgb or cairoPatternAddColorStopRgba.

Usage

cairoPatternCreateRadial(cx0, cy0, radius0, cx1, cy1, radius1)

Arguments

cx0 [numeric] x coordinate for the center of the start circle
cy0 [numeric] y coordinate for the center of the start circle
radius0 [numeric] radius of the start circle
cx1 [numeric] x coordinate for the center of the end circle
cy1 [numeric] y coordinate for the center of the end circle
radius1 [numeric] radius of the end circle

Details

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 cairoPatternSetMatrix.

Value

[CairoPattern] the newly created CairoPattern if successful, or an error pattern in case of no memory.
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 cairoPatternStatus.

Author(s)

Derived by RGtkGen from GTK+ documentation


[Package RGtk2 version 2.12.5-3 Index]