先看效果
- 头像间有间隔
- 头像间无间隔
代码
网络图片下载到本地
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36func multiGetImages(urls []string, dir string, prefix string)(localPath []string){
var w = sync.WaitGroup{}
w.Add(len(urls))
timestamp := time.Now().UnixNano()
for i, url :=range urls {
name := fmt.Sprintf("%s/%s_%d_%d.png", dir, prefix, timestamp, i)
localPath = append(localPath, name)
go downloadImage(url, name, &w)
}
w.Wait()
return
}
func downloadImage(url string, imgName string, wg *sync.WaitGroup){
defer wg.Done()
out, err := os.Create(imgName)
if err != nil {
fmt.Println(err)
return
}
defer out.Close()
client := http.Client{Timeout: 2 * time.Second}
resp, err := client.Get(url)
if err != nil {
fmt.Println(err)
return
}
defer resp.Body.Close()
pix, err := ioutil.ReadAll(resp.Body)
if err != nil {
fmt.Println(err)
return
}
_, err = io.Copy(out, bytes.NewReader(pix))
return
}图片拼接
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31func imageCompose(imagePath string, localPaths []string, gap int) {
imageSize := 80
imageRow := int(math.Sqrt(float64(len(localPaths)))) // 根据传入图片数量判断行列数量
imageCol := imageRow
rowOffset := gap
colOffset := gap
backImg := imaging.New(imageSize*imageRow+gap*(imageCol+1), imageSize*imageCol+gap*(imageRow+1), color.NRGBA{255, 255, 255, 255})
tempRow, tempCol := 1, 1
for tempRow < imageRow+1 {
for tempCol < imageCol+1 {
imgIndex := imageCol*(tempRow-1) + tempCol - 1
resizeImg, err := imaging.Open(localPaths[imgIndex])
if err != nil {
fmt.Println(err)
}
resizeImg = imaging.Blur(imaging.Resize(resizeImg, imageSize, imageSize, imaging.Lanczos), 2) // 加了模糊操作
backImg = imaging.Paste(backImg, resizeImg, image.Pt((tempCol-1)*imageSize+colOffset, (tempRow-1)*imageSize+rowOffset))
tempCol += 1
colOffset += gap
}
tempRow += 1
rowOffset += gap
tempCol = 1
colOffset = gap
}
err := imaging.Save(backImg, imagePath)
if err != nil {
fmt.Println(err)
}
return
}删除临时图片
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8func removeFile(filePaths []string){
for _,url := range filePaths{
err := os.RemoveAll(url)
if err != nil {
fmt.Println(err)
}
}
}
