Source: names.go in package image


package image

import (
	"image/color"
)

Black is an opaque black uniform image.

White is an opaque white uniform image.

Transparent is a fully transparent uniform image.

Opaque is a fully opaque uniform image.

	Opaque = NewUniform(color.Opaque)
)

Uniform is an infinite-sized Image of uniform color. It implements the color.Color, color.Model, and Image interfaces.

type Uniform struct {
	C color.Color
}

func (c *Uniform) RGBA() (r, g, b, a uint32) {
	return c.C.RGBA()
}

func (c *Uniform) ColorModel() color.Model {
	return c
}

func (c *Uniform) Convert(color.Color) color.Color {
	return c.C
}

func (c *Uniform) Bounds() Rectangle { return Rectangle{Point{-1e9, -1e9}, Point{1e9, 1e9}} }

func (c *Uniform) At(x, y int) color.Color { return c.C }

Opaque scans the entire image and reports whether it is fully opaque.

func (c *Uniform) Opaque() bool {
	_, _, _, a := c.C.RGBA()
	return a == 0xffff
}

NewUniform returns a new Uniform image of the given color.

func NewUniform(c color.Color) *Uniform {
	return &Uniform{c}