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41 lines
1.1 KiB
Go
41 lines
1.1 KiB
Go
// Copyright 2010 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package image
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var (
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// Black is an opaque black ColorImage.
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Black = ColorImage{Gray16Color{0}}
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// White is an opaque white ColorImage.
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White = ColorImage{Gray16Color{0xffff}}
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// Transparent is a fully transparent ColorImage.
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Transparent = ColorImage{Alpha16Color{0}}
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// Opaque is a fully opaque ColorImage.
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Opaque = ColorImage{Alpha16Color{0xffff}}
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)
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// A ColorImage is a practically infinite-sized Image of uniform Color.
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// It implements both the Color and Image interfaces.
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type ColorImage struct {
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C Color
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}
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func (c ColorImage) RGBA() (r, g, b, a uint32) {
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return c.C.RGBA()
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}
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func (c ColorImage) ColorModel() ColorModel {
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return ColorModelFunc(func(Color) Color { return c.C })
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}
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func (c ColorImage) Bounds() Rectangle { return Rectangle{ZP, Point{1e9, 1e9}} }
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func (c ColorImage) At(x, y int) Color { return c.C }
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// Opaque scans the entire image and returns whether or not it is fully opaque.
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func (c ColorImage) Opaque() bool {
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_, _, _, a := c.C.RGBA()
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return a == 0xffff
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}
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