45 lines
1.2 KiB
Go
45 lines
1.2 KiB
Go
// Copyright 2014 The Gogs Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package avatar
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import (
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"fmt"
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"image"
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"image/color/palette"
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"math/rand"
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"time"
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"github.com/issue9/identicon"
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)
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// AvatarSize returns avatar's size
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const AvatarSize = 290
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// RandomImageSize generates and returns a random avatar image unique to input data
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// in custom size (height and width).
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func RandomImageSize(size int, data []byte) (image.Image, error) {
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randExtent := len(palette.WebSafe) - 32
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rand.Seed(time.Now().UnixNano())
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colorIndex := rand.Intn(randExtent)
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backColorIndex := colorIndex - 1
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if backColorIndex < 0 {
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backColorIndex = randExtent - 1
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}
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// Define size, background, and forecolor
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imgMaker, err := identicon.New(size,
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palette.WebSafe[backColorIndex], palette.WebSafe[colorIndex:colorIndex+32]...)
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if err != nil {
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return nil, fmt.Errorf("identicon.New: %v", err)
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}
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return imgMaker.Make(data), nil
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}
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// RandomImage generates and returns a random avatar image unique to input data
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// in default size (height and width).
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func RandomImage(data []byte) (image.Image, error) {
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return RandomImageSize(AvatarSize, data)
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}
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