CairoPattern
along the line defined
by (x0, y0) and (x1, y1). Before using the gradient pattern, a
number of color stops should be defined using
cairoPatternAddColorStopRgb
or
cairoPatternAddColorStopRgba
.cairoPatternCreateLinear(x0, y0, x1, y1)
x0
y0
x1
y1
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
.cairoPatternSetMatrix
.