remove sync.Pool and support go1.2 again
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					 8 changed files with 777 additions and 3 deletions
				
			
		|  | @ -14,7 +14,6 @@ github.com/go-xorm/core = | |||
| github.com/go-xorm/xorm =  | ||||
| github.com/gogits/chardet = commit:2404f77725 | ||||
| github.com/gogits/go-gogs-client = commit:92e76d616a | ||||
| github.com/issue9/identicon =  | ||||
| github.com/lib/pq = commit:0dad96c0b9 | ||||
| github.com/macaron-contrib/binding = commit:de6ed78668 | ||||
| github.com/macaron-contrib/cache = commit:cd824f6f2d | ||||
|  |  | |||
|  | @ -134,7 +134,7 @@ func (u *User) AvatarLink() string { | |||
| 				return defaultImgUrl | ||||
| 			} | ||||
| 			if err = os.MkdirAll(path.Dir(imgPath), os.ModePerm); err != nil { | ||||
| 				log.Error(3, "Create: %v", err) | ||||
| 				log.Error(3, "MkdirAll: %v", err) | ||||
| 				return defaultImgUrl | ||||
| 			} | ||||
| 			fw, err := os.Create(imgPath) | ||||
|  | @ -148,6 +148,7 @@ func (u *User) AvatarLink() string { | |||
| 				log.Error(3, "Encode: %v", err) | ||||
| 				return defaultImgUrl | ||||
| 			} | ||||
| 			log.Info("New random avatar created: %d", u.Id) | ||||
| 		} | ||||
| 
 | ||||
| 		return setting.AppSubUrl + "/avatars/" + com.ToStr(u.Id) | ||||
|  |  | |||
|  | @ -32,9 +32,9 @@ import ( | |||
| 	"sync" | ||||
| 	"time" | ||||
| 
 | ||||
| 	"github.com/issue9/identicon" | ||||
| 	"github.com/nfnt/resize" | ||||
| 
 | ||||
| 	"github.com/gogits/gogs/modules/identicon" | ||||
| 	"github.com/gogits/gogs/modules/log" | ||||
| 	"github.com/gogits/gogs/modules/setting" | ||||
| ) | ||||
|  |  | |||
							
								
								
									
										405
									
								
								modules/identicon/block.go
									
									
									
									
									
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										405
									
								
								modules/identicon/block.go
									
									
									
									
									
										Normal file
									
								
							|  | @ -0,0 +1,405 @@ | |||
| // Copyright 2015 by caixw, All rights reserved
 | ||||
| // Use of this source code is governed by a MIT
 | ||||
| // license that can be found in the LICENSE file.
 | ||||
| 
 | ||||
| package identicon | ||||
| 
 | ||||
| import ( | ||||
| 	"image" | ||||
| ) | ||||
| 
 | ||||
| var ( | ||||
| 	// 可以出现在中间的方块,一般为了美观,都是对称图像。
 | ||||
| 	centerBlocks = []blockFunc{b0, b1, b2, b3} | ||||
| 
 | ||||
| 	// 所有方块
 | ||||
| 	blocks = []blockFunc{b0, b1, b2, b3, b4, b5, b6, b7, b8, b9, b10, b11, b12, b13, b14, b15, b16} | ||||
| ) | ||||
| 
 | ||||
| // 所有block函数的类型
 | ||||
| type blockFunc func(img *image.Paletted, x, y, size float64, angle int) | ||||
| 
 | ||||
| // 将多边形points旋转angle个角度,然后输出到img上,起点为x,y坐标
 | ||||
| func drawBlock(img *image.Paletted, x, y, size float64, angle int, points []float64) { | ||||
| 	if angle > 0 { // 0角度不需要转换
 | ||||
| 		// 中心坐标与x,y的距离,方便下面指定中心坐标(x+m,y+m),
 | ||||
| 		// 0.5的偏移值不能少,否则坐靠右,非正中央
 | ||||
| 		m := size/2 - 0.5 | ||||
| 		rotate(points, x+m, y+m, angle) | ||||
| 	} | ||||
| 
 | ||||
| 	for i := x; i < x+size; i++ { | ||||
| 		for j := y; j < y+size; j++ { | ||||
| 			if pointInPolygon(i, j, points) { | ||||
| 				img.SetColorIndex(int(i), int(j), 1) | ||||
| 			} | ||||
| 		} | ||||
| 	} | ||||
| } | ||||
| 
 | ||||
| // 全空白
 | ||||
| //
 | ||||
| //  --------
 | ||||
| //  |      |
 | ||||
| //  |      |
 | ||||
| //  |      |
 | ||||
| //  --------
 | ||||
| func b0(img *image.Paletted, x, y, size float64, angle int) { | ||||
| } | ||||
| 
 | ||||
| // 全填充正方形
 | ||||
| //
 | ||||
| //  --------
 | ||||
| //  |######|
 | ||||
| //  |######|
 | ||||
| //  |######|
 | ||||
| //  --------
 | ||||
| func b1(img *image.Paletted, x, y, size float64, angle int) { | ||||
| 	isize := int(size) | ||||
| 	ix := int(x) | ||||
| 	iy := int(y) | ||||
| 	for i := ix + 1; i < ix+isize; i++ { | ||||
| 		for j := iy + 1; j < iy+isize; j++ { | ||||
| 			img.SetColorIndex(i, j, 1) | ||||
| 		} | ||||
| 	} | ||||
| } | ||||
| 
 | ||||
| // 中间小方块
 | ||||
| //  ----------
 | ||||
| //  |        |
 | ||||
| //  |  ####  |
 | ||||
| //  |  ####  |
 | ||||
| //  |        |
 | ||||
| //  ----------
 | ||||
| func b2(img *image.Paletted, x, y, size float64, angle int) { | ||||
| 	l := size / 4 | ||||
| 	x = x + l | ||||
| 	y = y + l | ||||
| 
 | ||||
| 	for i := x; i < x+2*l; i++ { | ||||
| 		for j := y; j < y+2*l; j++ { | ||||
| 			img.SetColorIndex(int(i), int(j), 1) | ||||
| 		} | ||||
| 	} | ||||
| } | ||||
| 
 | ||||
| // 菱形
 | ||||
| //
 | ||||
| //  ---------
 | ||||
| //  |   #   |
 | ||||
| //  |  ###  |
 | ||||
| //  | ##### |
 | ||||
| //  |#######|
 | ||||
| //  | ##### |
 | ||||
| //  |  ###  |
 | ||||
| //  |   #   |
 | ||||
| //  ---------
 | ||||
| func b3(img *image.Paletted, x, y, size float64, angle int) { | ||||
| 	m := size / 2 | ||||
| 	points := []float64{} | ||||
| 
 | ||||
| 	drawBlock(img, x, y, size, 0, append(points, | ||||
| 		x+m, y, | ||||
| 		x+size, y+m, | ||||
| 		x+m, y+size, | ||||
| 		x, y+m, | ||||
| 		x+m, y, | ||||
| 	)) | ||||
| } | ||||
| 
 | ||||
| // b4
 | ||||
| //
 | ||||
| //  -------
 | ||||
| //  |#####|
 | ||||
| //  |#### |
 | ||||
| //  |###  |
 | ||||
| //  |##   |
 | ||||
| //  |#    |
 | ||||
| //  |------
 | ||||
| func b4(img *image.Paletted, x, y, size float64, angle int) { | ||||
| 	points := []float64{} | ||||
| 	drawBlock(img, x, y, size, angle, append(points, | ||||
| 		x, y, | ||||
| 		x+size, y, | ||||
| 		x, y+size, | ||||
| 		x, y, | ||||
| 	)) | ||||
| } | ||||
| 
 | ||||
| // b5
 | ||||
| //
 | ||||
| //  ---------
 | ||||
| //  |   #   |
 | ||||
| //  |  ###  |
 | ||||
| //  | ##### |
 | ||||
| //  |#######|
 | ||||
| func b5(img *image.Paletted, x, y, size float64, angle int) { | ||||
| 	points := []float64{} | ||||
| 	m := size / 2 | ||||
| 	drawBlock(img, x, y, size, angle, append(points, | ||||
| 		x+m, y, | ||||
| 		x+size, | ||||
| 		y+size, | ||||
| 		x, y+size, | ||||
| 		x+m, y, | ||||
| 	)) | ||||
| } | ||||
| 
 | ||||
| // b6 矩形
 | ||||
| //
 | ||||
| //  --------
 | ||||
| //  |###   |
 | ||||
| //  |###   |
 | ||||
| //  |###   |
 | ||||
| //  --------
 | ||||
| func b6(img *image.Paletted, x, y, size float64, angle int) { | ||||
| 	points := []float64{} | ||||
| 	m := size / 2 | ||||
| 	drawBlock(img, x, y, size, angle, append(points, | ||||
| 		x, y, | ||||
| 		x+m, y, | ||||
| 		x+m, y+size, | ||||
| 		x, y+size, | ||||
| 		x, y, | ||||
| 	)) | ||||
| } | ||||
| 
 | ||||
| // b7 斜放的锥形
 | ||||
| //
 | ||||
| //  ---------
 | ||||
| //  | #     |
 | ||||
| //  |  ##   |
 | ||||
| //  |  #####|
 | ||||
| //  |   ####|
 | ||||
| //  |--------
 | ||||
| func b7(img *image.Paletted, x, y, size float64, angle int) { | ||||
| 	points := []float64{} | ||||
| 	m := size / 2 | ||||
| 	drawBlock(img, x, y, size, angle, append(points, | ||||
| 		x, y, | ||||
| 		x+size, y+m, | ||||
| 		x+size, y+size, | ||||
| 		x+m, y+size, | ||||
| 		x, y, | ||||
| 	)) | ||||
| } | ||||
| 
 | ||||
| // b8 三个堆叠的三角形
 | ||||
| //
 | ||||
| //  -----------
 | ||||
| //  |    #    |
 | ||||
| //  |   ###   |
 | ||||
| //  |  #####  |
 | ||||
| //  |  #   #  |
 | ||||
| //  | ### ### |
 | ||||
| //  |#########|
 | ||||
| //  -----------
 | ||||
| func b8(img *image.Paletted, x, y, size float64, angle int) { | ||||
| 	points := []float64{} | ||||
| 	m := size / 2 | ||||
| 	mm := m / 2 | ||||
| 
 | ||||
| 	// 顶部三角形
 | ||||
| 	drawBlock(img, x, y, size, angle, append(points, | ||||
| 		x+m, y, | ||||
| 		x+3*mm, y+m, | ||||
| 		x+mm, y+m, | ||||
| 		x+m, y, | ||||
| 	)) | ||||
| 
 | ||||
| 	// 底下左边
 | ||||
| 	drawBlock(img, x, y, size, angle, append(points[:0], | ||||
| 		x+mm, y+m, | ||||
| 		x+m, y+size, | ||||
| 		x, y+size, | ||||
| 		x+mm, y+m, | ||||
| 	)) | ||||
| 
 | ||||
| 	// 底下右边
 | ||||
| 	drawBlock(img, x, y, size, angle, append(points[:0], | ||||
| 		x+3*mm, y+m, | ||||
| 		x+size, y+size, | ||||
| 		x+m, y+size, | ||||
| 		x+3*mm, y+m, | ||||
| 	)) | ||||
| } | ||||
| 
 | ||||
| // b9 斜靠的三角形
 | ||||
| //
 | ||||
| //  ---------
 | ||||
| //  |#      |
 | ||||
| //  | ####  |
 | ||||
| //  |  #####|
 | ||||
| //  |  #### |
 | ||||
| //  |   #   |
 | ||||
| //  ---------
 | ||||
| func b9(img *image.Paletted, x, y, size float64, angle int) { | ||||
| 	points := []float64{} | ||||
| 	m := size / 2 | ||||
| 	drawBlock(img, x, y, size, angle, append(points, | ||||
| 		x, y, | ||||
| 		x+size, y+m, | ||||
| 		x+m, y+size, | ||||
| 		x, y, | ||||
| 	)) | ||||
| } | ||||
| 
 | ||||
| // b10
 | ||||
| //
 | ||||
| //  ----------
 | ||||
| //  |    ####|
 | ||||
| //  |    ### |
 | ||||
| //  |    ##  |
 | ||||
| //  |    #   |
 | ||||
| //  |####    |
 | ||||
| //  |###     |
 | ||||
| //  |##      |
 | ||||
| //  |#       |
 | ||||
| //  ----------
 | ||||
| func b10(img *image.Paletted, x, y, size float64, angle int) { | ||||
| 	points := []float64{} | ||||
| 	m := size / 2 | ||||
| 	drawBlock(img, x, y, size, angle, append(points, | ||||
| 		x+m, y, | ||||
| 		x+size, y, | ||||
| 		x+m, y+m, | ||||
| 		x+m, y, | ||||
| 	)) | ||||
| 
 | ||||
| 	drawBlock(img, x, y, size, angle, append(points[:0], | ||||
| 		x, y+m, | ||||
| 		x+m, y+m, | ||||
| 		x, y+size, | ||||
| 		x, y+m, | ||||
| 	)) | ||||
| } | ||||
| 
 | ||||
| // b11 左上角1/4大小的方块
 | ||||
| //
 | ||||
| //  ----------
 | ||||
| //  |####    |
 | ||||
| //  |####    |
 | ||||
| //  |####    |
 | ||||
| //  |        |
 | ||||
| //  |        |
 | ||||
| //  ----------
 | ||||
| func b11(img *image.Paletted, x, y, size float64, angle int) { | ||||
| 	points := []float64{} | ||||
| 	m := size / 2 | ||||
| 	drawBlock(img, x, y, size, angle, append(points, | ||||
| 		x, y, | ||||
| 		x+m, y, | ||||
| 		x+m, y+m, | ||||
| 		x, y+m, | ||||
| 		x, y, | ||||
| 	)) | ||||
| } | ||||
| 
 | ||||
| // b12
 | ||||
| //
 | ||||
| //  -----------
 | ||||
| //  |         |
 | ||||
| //  |         |
 | ||||
| //  |#########|
 | ||||
| //  |  #####  |
 | ||||
| //  |    #    |
 | ||||
| //  -----------
 | ||||
| func b12(img *image.Paletted, x, y, size float64, angle int) { | ||||
| 	points := []float64{} | ||||
| 	m := size / 2 | ||||
| 	drawBlock(img, x, y, size, angle, append(points, | ||||
| 		x, y+m, | ||||
| 		x+size, y+m, | ||||
| 		x+m, y+size, | ||||
| 		x, y+m, | ||||
| 	)) | ||||
| } | ||||
| 
 | ||||
| // b13
 | ||||
| //
 | ||||
| //  -----------
 | ||||
| //  |         |
 | ||||
| //  |         |
 | ||||
| //  |    #    |
 | ||||
| //  |  #####  |
 | ||||
| //  |#########|
 | ||||
| //  -----------
 | ||||
| func b13(img *image.Paletted, x, y, size float64, angle int) { | ||||
| 	points := []float64{} | ||||
| 	m := size / 2 | ||||
| 	drawBlock(img, x, y, size, angle, append(points, | ||||
| 		x+m, y+m, | ||||
| 		x+size, y+size, | ||||
| 		x, y+size, | ||||
| 		x+m, y+m, | ||||
| 	)) | ||||
| } | ||||
| 
 | ||||
| // b14
 | ||||
| //
 | ||||
| //  ---------
 | ||||
| //  |   #   |
 | ||||
| //  | ###   |
 | ||||
| //  |####   |
 | ||||
| //  |       |
 | ||||
| //  |       |
 | ||||
| //  ---------
 | ||||
| func b14(img *image.Paletted, x, y, size float64, angle int) { | ||||
| 	points := []float64{} | ||||
| 	m := size / 2 | ||||
| 	drawBlock(img, x, y, size, angle, append(points, | ||||
| 		x+m, y, | ||||
| 		x+m, y+m, | ||||
| 		x, y+m, | ||||
| 		x+m, y, | ||||
| 	)) | ||||
| } | ||||
| 
 | ||||
| // b15
 | ||||
| //
 | ||||
| //  ----------
 | ||||
| //  |#####   |
 | ||||
| //  |###     |
 | ||||
| //  |#       |
 | ||||
| //  |        |
 | ||||
| //  |        |
 | ||||
| //  ----------
 | ||||
| func b15(img *image.Paletted, x, y, size float64, angle int) { | ||||
| 	points := []float64{} | ||||
| 	m := size / 2 | ||||
| 	drawBlock(img, x, y, size, angle, append(points, | ||||
| 		x, y, | ||||
| 		x+m, y, | ||||
| 		x, y+m, | ||||
| 		x, y, | ||||
| 	)) | ||||
| } | ||||
| 
 | ||||
| // b16
 | ||||
| //
 | ||||
| //  ---------
 | ||||
| //  |   #   |
 | ||||
| //  | ##### |
 | ||||
| //  |#######|
 | ||||
| //  |   #   |
 | ||||
| //  | ##### |
 | ||||
| //  |#######|
 | ||||
| //  ---------
 | ||||
| func b16(img *image.Paletted, x, y, size float64, angle int) { | ||||
| 	points := []float64{} | ||||
| 	m := size / 2 | ||||
| 	drawBlock(img, x, y, size, angle, append(points, | ||||
| 		x+m, y, | ||||
| 		x+size, y+m, | ||||
| 		x, y+m, | ||||
| 		x+m, y, | ||||
| 	)) | ||||
| 
 | ||||
| 	drawBlock(img, x, y, size, angle, append(points[:0], | ||||
| 		x+m, y+m, | ||||
| 		x+size, y+size, | ||||
| 		x, y+size, | ||||
| 		x+m, y+m, | ||||
| 	)) | ||||
| } | ||||
							
								
								
									
										39
									
								
								modules/identicon/doc.go
									
									
									
									
									
										Normal file
									
								
							
							
						
						
									
										39
									
								
								modules/identicon/doc.go
									
									
									
									
									
										Normal file
									
								
							|  | @ -0,0 +1,39 @@ | |||
| // Copyright 2015 by caixw, All rights reserved.
 | ||||
| // Use of this source code is governed by a MIT
 | ||||
| // license that can be found in the LICENSE file.
 | ||||
| 
 | ||||
| // 一个基于hash值生成随机图像的包。
 | ||||
| //
 | ||||
| // 关于identicon并没有统一的标准,一般用于在用户注册时,
 | ||||
| // 取用户的邮箱或是访问IP等数据(也可以是其它任何数据),
 | ||||
| // 进行hash运算,之后根据hash数据,产生一张图像,
 | ||||
| // 这样即可以为用户产生一张独特的头像,又不会泄漏用户的隐藏。
 | ||||
| //
 | ||||
| // 在identicon中,把图像分成以下九个部分:
 | ||||
| //  -------------
 | ||||
| //  | 1 | 2 | 3 |
 | ||||
| //  -------------
 | ||||
| //  | 4 | 5 | 6 |
 | ||||
| //  -------------
 | ||||
| //  | 7 | 8 | 9 |
 | ||||
| //  -------------
 | ||||
| // 其中1、3、9、7为不同角度(依次增加90度)的同一张图片,
 | ||||
| // 2、6、8、4也是如此,这样可以保持图像是对称的,比较美观。
 | ||||
| // 5则单独使用一张图片。
 | ||||
| //
 | ||||
| //  // 根据用户访问的IP,为其生成一张头像
 | ||||
| //  img, _ := identicon.Make(128, color.NRGBA{},color.NRGBA{}, []byte("192.168.1.1"))
 | ||||
| //  fi, _ := os.Create("/tmp/u1.png")
 | ||||
| //  png.Encode(fi, img)
 | ||||
| //  fi.Close()
 | ||||
| //
 | ||||
| //  // 或者
 | ||||
| //  ii, _ := identicon.New(128, color.NRGBA{}, color.NRGBA{}, color.NRGBA{})
 | ||||
| //  img := ii.Make([]byte("192.168.1.1"))
 | ||||
| //  img = ii.Make([]byte("192.168.1.2"))
 | ||||
| //
 | ||||
| // NOTE: go test 会在当前目录的testdata文件夹下产生大量的随机图片。
 | ||||
| // 要运行测试,必须保证该文件夹是存在的,且有相应的写入权限。
 | ||||
| package identicon | ||||
| 
 | ||||
| const Version = "0.2.6.150603" | ||||
							
								
								
									
										147
									
								
								modules/identicon/identicon.go
									
									
									
									
									
										Normal file
									
								
							
							
						
						
									
										147
									
								
								modules/identicon/identicon.go
									
									
									
									
									
										Normal file
									
								
							|  | @ -0,0 +1,147 @@ | |||
| // Copyright 2015 by caixw, All rights reserved.
 | ||||
| // Use of this source code is governed by a MIT
 | ||||
| // license that can be found in the LICENSE file.
 | ||||
| 
 | ||||
| package identicon | ||||
| 
 | ||||
| import ( | ||||
| 	"crypto/md5" | ||||
| 	"fmt" | ||||
| 	"image" | ||||
| 	"image/color" | ||||
| ) | ||||
| 
 | ||||
| const ( | ||||
| 	minSize       = 16 // 图片的最小尺寸
 | ||||
| 	maxForeColors = 32 // 在New()函数中可以指定的最大颜色数量
 | ||||
| ) | ||||
| 
 | ||||
| // Identicon 用于产生统一尺寸的头像。
 | ||||
| // 可以根据用户提供的数据,经过一定的算法,自动产生相应的图案和颜色。
 | ||||
| type Identicon struct { | ||||
| 	foreColors []color.Color | ||||
| 	backColor  color.Color | ||||
| 	size       int | ||||
| 	rect       image.Rectangle | ||||
| } | ||||
| 
 | ||||
| // 声明一个Identicon实例。
 | ||||
| // size表示整个头像的大小。
 | ||||
| // back表示前景色。
 | ||||
| // fore表示所有可能的前景色,会为每个图像随机挑选一个作为其前景色。
 | ||||
| // NOTE:前景色不要与背景色太相近。
 | ||||
| func New(size int, back color.Color, fore ...color.Color) (*Identicon, error) { | ||||
| 	if len(fore) == 0 || len(fore) > maxForeColors { | ||||
| 		return nil, fmt.Errorf("前景色数量必须介于[1]~[%v]之间,当前为[%v]", maxForeColors, len(fore)) | ||||
| 	} | ||||
| 
 | ||||
| 	if size < minSize { | ||||
| 		return nil, fmt.Errorf("参数size的值(%v)不能小于%v", size, minSize) | ||||
| 	} | ||||
| 
 | ||||
| 	return &Identicon{ | ||||
| 		foreColors: fore, | ||||
| 		backColor:  back, | ||||
| 		size:       size, | ||||
| 
 | ||||
| 		// 画布坐标从0开始,其长度应该是size-1
 | ||||
| 		rect: image.Rect(0, 0, size, size), | ||||
| 	}, nil | ||||
| } | ||||
| 
 | ||||
| // 根据data数据产生一张唯一性的头像图片。
 | ||||
| func (i *Identicon) Make(data []byte) image.Image { | ||||
| 	h := md5.New() | ||||
| 	h.Write(data) | ||||
| 	sum := h.Sum(nil) | ||||
| 
 | ||||
| 	// 第一个方块
 | ||||
| 	index := int(sum[0]+sum[1]+sum[2]+sum[3]) % len(blocks) | ||||
| 	b1 := blocks[index] | ||||
| 
 | ||||
| 	// 第二个方块
 | ||||
| 	index = int(sum[4]+sum[5]+sum[6]+sum[7]) % len(blocks) | ||||
| 	b2 := blocks[index] | ||||
| 
 | ||||
| 	// 中间方块
 | ||||
| 	index = int(sum[8]+sum[9]+sum[10]+sum[11]) % len(centerBlocks) | ||||
| 	c := centerBlocks[index] | ||||
| 
 | ||||
| 	// 旋转角度
 | ||||
| 	angle := int(sum[12]+sum[13]+sum[14]) % 4 | ||||
| 
 | ||||
| 	// 根据最后一个字段,获取前景颜色
 | ||||
| 	index = int(sum[15]) % len(i.foreColors) | ||||
| 
 | ||||
| 	p := image.NewPaletted(i.rect, []color.Color{i.backColor, i.foreColors[index]}) | ||||
| 	drawBlocks(p, i.size, c, b1, b2, angle) | ||||
| 	return p | ||||
| } | ||||
| 
 | ||||
| // 根据data数据产生一张唯一性的头像图片。
 | ||||
| // size 头像的大小。
 | ||||
| // back, fore头像的背景和前景色。
 | ||||
| func Make(size int, back, fore color.Color, data []byte) (image.Image, error) { | ||||
| 	if size < minSize { | ||||
| 		return nil, fmt.Errorf("参数size的值(%v)不能小于%v", size, minSize) | ||||
| 	} | ||||
| 
 | ||||
| 	h := md5.New() | ||||
| 	h.Write(data) | ||||
| 	sum := h.Sum(nil) | ||||
| 
 | ||||
| 	// 第一个方块
 | ||||
| 	index := int(sum[0]+sum[1]+sum[2]+sum[3]) % len(blocks) | ||||
| 	b1 := blocks[index] | ||||
| 
 | ||||
| 	// 第二个方块
 | ||||
| 	index = int(sum[4]+sum[5]+sum[6]+sum[7]) % len(blocks) | ||||
| 	b2 := blocks[index] | ||||
| 
 | ||||
| 	// 中间方块
 | ||||
| 	index = int(sum[8]+sum[9]+sum[10]+sum[11]) % len(centerBlocks) | ||||
| 	c := centerBlocks[index] | ||||
| 
 | ||||
| 	// 旋转角度
 | ||||
| 	angle := int(sum[12]+sum[13]+sum[14]+sum[15]) % 4 | ||||
| 
 | ||||
| 	// 画布坐标从0开始,其长度应该是size-1
 | ||||
| 	p := image.NewPaletted(image.Rect(0, 0, size, size), []color.Color{back, fore}) | ||||
| 	drawBlocks(p, size, c, b1, b2, angle) | ||||
| 	return p, nil | ||||
| } | ||||
| 
 | ||||
| // 将九个方格都填上内容。
 | ||||
| // p为画板。
 | ||||
| // c为中间方格的填充函数。
 | ||||
| // b1,b2为边上8格的填充函数。
 | ||||
| // angle为b1,b2的起始旋转角度。
 | ||||
| func drawBlocks(p *image.Paletted, size int, c, b1, b2 blockFunc, angle int) { | ||||
| 	// 每个格子的长宽。先转换成float,再计算!
 | ||||
| 	blockSize := float64(size) / 3 | ||||
| 	twoBlockSize := 2 * blockSize | ||||
| 
 | ||||
| 	incr := func() { // 增加angle的值,但不会大于3
 | ||||
| 		angle++ | ||||
| 		if angle > 3 { | ||||
| 			angle = 0 | ||||
| 		} | ||||
| 	} | ||||
| 
 | ||||
| 	c(p, blockSize, blockSize, blockSize, 0) | ||||
| 
 | ||||
| 	b1(p, 0, 0, blockSize, angle) | ||||
| 	b2(p, blockSize, 0, blockSize, angle) | ||||
| 
 | ||||
| 	incr() | ||||
| 	b1(p, twoBlockSize, 0, blockSize, angle) | ||||
| 	b2(p, twoBlockSize, blockSize, blockSize, angle) | ||||
| 
 | ||||
| 	incr() | ||||
| 	b1(p, twoBlockSize, twoBlockSize, blockSize, angle) | ||||
| 	b2(p, blockSize, twoBlockSize, blockSize, angle) | ||||
| 
 | ||||
| 	incr() | ||||
| 	b1(p, 0, twoBlockSize, blockSize, angle) | ||||
| 	b2(p, 0, blockSize, blockSize, angle) | ||||
| } | ||||
							
								
								
									
										114
									
								
								modules/identicon/identicon_test.go
									
									
									
									
									
										Normal file
									
								
							
							
						
						
									
										114
									
								
								modules/identicon/identicon_test.go
									
									
									
									
									
										Normal file
									
								
							|  | @ -0,0 +1,114 @@ | |||
| // Copyright 2015 by caixw, All rights reserved.
 | ||||
| // Use of this source code is governed by a MIT
 | ||||
| // license that can be found in the LICENSE file.
 | ||||
| 
 | ||||
| package identicon | ||||
| 
 | ||||
| import ( | ||||
| 	"image" | ||||
| 	"image/color" | ||||
| 	"image/png" | ||||
| 	"os" | ||||
| 	"strconv" | ||||
| 	"testing" | ||||
| 
 | ||||
| 	"github.com/issue9/assert" | ||||
| ) | ||||
| 
 | ||||
| var ( | ||||
| 	back  = color.RGBA{255, 0, 0, 100} | ||||
| 	fore  = color.RGBA{0, 255, 255, 100} | ||||
| 	fores = []color.Color{color.Black, color.RGBA{200, 2, 5, 100}, color.RGBA{2, 200, 5, 100}} | ||||
| 	size  = 128 | ||||
| ) | ||||
| 
 | ||||
| // 依次画出各个网络的图像。
 | ||||
| func TestBlocks(t *testing.T) { | ||||
| 	p := []color.Color{back, fore} | ||||
| 
 | ||||
| 	a := assert.New(t) | ||||
| 
 | ||||
| 	for k, v := range blocks { | ||||
| 		img := image.NewPaletted(image.Rect(0, 0, size*4, size), p) // 横向4张图片大小
 | ||||
| 
 | ||||
| 		for i := 0; i < 4; i++ { | ||||
| 			v(img, float64(i*size), 0, float64(size), i) | ||||
| 		} | ||||
| 
 | ||||
| 		fi, err := os.Create("./testdata/block-" + strconv.Itoa(k) + ".png") | ||||
| 		a.NotError(err).NotNil(fi) | ||||
| 		a.NotError(png.Encode(fi, img)) | ||||
| 		a.NotError(fi.Close()) // 关闭文件
 | ||||
| 	} | ||||
| } | ||||
| 
 | ||||
| // 产生一组测试图片
 | ||||
| func TestDrawBlocks(t *testing.T) { | ||||
| 	a := assert.New(t) | ||||
| 
 | ||||
| 	for i := 0; i < 20; i++ { | ||||
| 		p := image.NewPaletted(image.Rect(0, 0, size, size), []color.Color{back, fore}) | ||||
| 		c := (i + 1) % len(centerBlocks) | ||||
| 		b1 := (i + 2) % len(blocks) | ||||
| 		b2 := (i + 3) % len(blocks) | ||||
| 		drawBlocks(p, size, centerBlocks[c], blocks[b1], blocks[b2], 0) | ||||
| 
 | ||||
| 		fi, err := os.Create("./testdata/draw-" + strconv.Itoa(i) + ".png") | ||||
| 		a.NotError(err).NotNil(fi) | ||||
| 		a.NotError(png.Encode(fi, p)) | ||||
| 		a.NotError(fi.Close()) // 关闭文件
 | ||||
| 	} | ||||
| } | ||||
| 
 | ||||
| func TestMake(t *testing.T) { | ||||
| 	a := assert.New(t) | ||||
| 
 | ||||
| 	for i := 0; i < 20; i++ { | ||||
| 		img, err := Make(size, back, fore, []byte("make-"+strconv.Itoa(i))) | ||||
| 		a.NotError(err).NotNil(img) | ||||
| 
 | ||||
| 		fi, err := os.Create("./testdata/make-" + strconv.Itoa(i) + ".png") | ||||
| 		a.NotError(err).NotNil(fi) | ||||
| 		a.NotError(png.Encode(fi, img)) | ||||
| 		a.NotError(fi.Close()) // 关闭文件
 | ||||
| 	} | ||||
| } | ||||
| 
 | ||||
| func TestIdenticon(t *testing.T) { | ||||
| 	a := assert.New(t) | ||||
| 
 | ||||
| 	ii, err := New(size, back, fores...) | ||||
| 	a.NotError(err).NotNil(ii) | ||||
| 
 | ||||
| 	for i := 0; i < 20; i++ { | ||||
| 		img := ii.Make([]byte("identicon-" + strconv.Itoa(i))) | ||||
| 		a.NotNil(img) | ||||
| 
 | ||||
| 		fi, err := os.Create("./testdata/identicon-" + strconv.Itoa(i) + ".png") | ||||
| 		a.NotError(err).NotNil(fi) | ||||
| 		a.NotError(png.Encode(fi, img)) | ||||
| 		a.NotError(fi.Close()) // 关闭文件
 | ||||
| 	} | ||||
| } | ||||
| 
 | ||||
| // BenchmarkMake	    5000	    229378 ns/op
 | ||||
| func BenchmarkMake(b *testing.B) { | ||||
| 	a := assert.New(b) | ||||
| 	for i := 0; i < b.N; i++ { | ||||
| 		img, err := Make(size, back, fore, []byte("Make")) | ||||
| 		a.NotError(err).NotNil(img) | ||||
| 	} | ||||
| } | ||||
| 
 | ||||
| // BenchmarkIdenticon_Make	   10000	    222127 ns/op
 | ||||
| func BenchmarkIdenticon_Make(b *testing.B) { | ||||
| 	a := assert.New(b) | ||||
| 
 | ||||
| 	ii, err := New(size, back, fores...) | ||||
| 	a.NotError(err).NotNil(ii) | ||||
| 
 | ||||
| 	for i := 0; i < b.N; i++ { | ||||
| 		img := ii.Make([]byte("Make")) | ||||
| 		a.NotNil(img) | ||||
| 	} | ||||
| } | ||||
							
								
								
									
										69
									
								
								modules/identicon/polygon.go
									
									
									
									
									
										Normal file
									
								
							
							
						
						
									
										69
									
								
								modules/identicon/polygon.go
									
									
									
									
									
										Normal file
									
								
							|  | @ -0,0 +1,69 @@ | |||
| // Copyright 2015 by caixw, All rights reserved.
 | ||||
| // Use of this source code is governed by a MIT
 | ||||
| // license that can be found in the LICENSE file.
 | ||||
| 
 | ||||
| package identicon | ||||
| 
 | ||||
| var ( | ||||
| 	// 4个元素分别表示cos(0),cos(90),cos(180),cos(270)
 | ||||
| 	cos = []float64{1, 0, -1, 0} | ||||
| 
 | ||||
| 	// 4个元素分别表示sin(0),sin(90),sin(180),sin(270)
 | ||||
| 	sin = []float64{0, 1, 0, -1} | ||||
| ) | ||||
| 
 | ||||
| // 将points中的所有点,以x,y为原点旋转angle个角度。
 | ||||
| // angle取值只能是[0,1,2,3],分别表示[0,90,180,270]
 | ||||
| func rotate(points []float64, x, y float64, angle int) { | ||||
| 	if angle > 3 { | ||||
| 		panic("rotate:参数angle必须0,1,2,3三值之一") | ||||
| 	} | ||||
| 
 | ||||
| 	for i := 0; i < len(points); i += 2 { | ||||
| 		px := points[i] - x | ||||
| 		py := points[i+1] - y | ||||
| 		points[i] = px*cos[angle] - py*sin[angle] + x | ||||
| 		points[i+1] = px*sin[angle] + py*cos[angle] + y | ||||
| 	} | ||||
| } | ||||
| 
 | ||||
| // 判断某个点是否在多边形之内,不包含构成多边形的线和点
 | ||||
| // x,y 需要判断的点坐标
 | ||||
| // points 组成多边形的所顶点,每两个元素表示一点顶点,其中最后一个顶点必须与第一个顶点相同。
 | ||||
| func pointInPolygon(x float64, y float64, points []float64) bool { | ||||
| 	if len(points) < 8 { // 只有2个以上的点,才能组成闭合多边形
 | ||||
| 		return false | ||||
| 	} | ||||
| 
 | ||||
| 	// 大致算法如下:
 | ||||
| 	// 把整个平面以给定的测试点为原点分两部分:
 | ||||
| 	// - y>0,包含(x>0 && y==0)
 | ||||
| 	// - y<0,包含(x<0 && y==0)
 | ||||
| 	// 依次扫描每一个点,当该点与前一个点处于不同部分时(即一个在y>0区,一个在y<0区),
 | ||||
| 	// 则判断从前一点到当前点是顺时针还是逆时针(以给定的测试点为原点),如果是顺时针r++,否则r--。
 | ||||
| 	// 结果为:2==abs(r)。
 | ||||
| 
 | ||||
| 	r := 0 | ||||
| 	x1, y1 := points[0], points[1] | ||||
| 	prev := (y1 > y) || ((x1 > x) && (y1 == y)) | ||||
| 	for i := 2; i < len(points); i += 2 { | ||||
| 		x2, y2 := points[i], points[i+1] | ||||
| 		curr := (y2 > y) || ((x2 > x) && (y2 == y)) | ||||
| 
 | ||||
| 		if curr == prev { | ||||
| 			x1, y1 = x2, y2 | ||||
| 			continue | ||||
| 		} | ||||
| 
 | ||||
| 		mul := (x1-x)*(y2-y) - (x2-x)*(y1-y) | ||||
| 		if mul > 0 { | ||||
| 			r++ | ||||
| 		} else if mul < 0 { | ||||
| 			r-- | ||||
| 		} | ||||
| 		x1, y1 = x2, y2 | ||||
| 		prev = curr | ||||
| 	} | ||||
| 
 | ||||
| 	return r == 2 || r == -2 | ||||
| } | ||||
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