gradient

README

This package is written in *[http://golang.org Go]* and provides an API for drawing linear and radial gradients. As of yet, the API is not guaranteed to be final and may be changed in non-backward compatible ways.

Documentation

Overview

Package gradient draws gradients with an api similar to that specified by SVG.

Index

• func DrawLinear(dst draw.Image, x0, y0, x1, y1 float64, stops []Stop)
• func DrawRadial(dst draw.Image, cx, cy, r, fx, fy float64, stops []Stop)
• type Stop

Functions

func DrawLinear

func DrawLinear(dst draw.Image, x0, y0, x1, y1 float64, stops []Stop)

DrawLinear draws a linear gradient to dst. If the gradient vector (as defined by x0, y0, x1, and y1) is found to be purely horizontal or purely vertical, the appropriate optimized functions will be called.

func DrawRadial

func DrawRadial(dst draw.Image, cx, cy, r, fx, fy float64, stops []Stop)

Types

type Stop

type Stop struct {
	// X is normally in the range [0,1], but values outside the range are
	// also accepted.
	X   float64
	Col color.Color
}

Stop is a gradient control point, where Col is the colour at X.