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