cairoPatternAddColorStopRgba {RGtk2} | R Documentation |
Adds a translucent color stop to a gradient pattern. The offset specifies the location along the gradient's control vector. For example, a linear gradient's control vector is from (x0,y0) to (x1,y1) while a radial gradient's control vector is from any point on the start circle to the corresponding point on the end circle.
cairoPatternAddColorStopRgba(pattern, offset, red, green, blue, alpha)
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[CairoPattern ] a CairoPattern |
|
[numeric] an offset in the range [0.0 .. 1.0] |
|
[numeric] red component of color |
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[numeric] green component of color |
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[numeric] blue component of color |
|
[numeric] alpha component of color |
The color is specified in the same way as in cairoSetSourceRgba
.
Note: If the pattern is not a gradient pattern, (eg. a linear or
radial pattern), then the pattern will be put into an error status
with a status of CAIRO_STATUS_PATTERN_TYPE_MISMATCH
.
Derived by RGtkGen from GTK+ documentation