59 lines
1.5 KiB
Go
59 lines
1.5 KiB
Go
package upload_file
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import (
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"catface/app/global/variable"
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"image"
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"os"
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"path/filepath"
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"github.com/disintegration/imaging"
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)
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/**
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* @description: ResizeImage 按照指定宽度等比例缩放图片
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* @param {string} srcPath 需要完整路径
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* @param {string} dstPath
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* @param {int} targetWidth
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* @return {*}
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*/
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func ResizeImage(srcPath string, dstPath string, targetWidth int) (targetHeight int, err error) {
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// 打开源图片文件
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srcFile, err := os.Open(srcPath)
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if err != nil {
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return
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}
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defer srcFile.Close()
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// 解码源图片
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srcImg, _, err := image.Decode(srcFile)
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if err != nil {
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return
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}
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// 获取源图片的尺寸
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bounds := srcImg.Bounds()
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srcWidth := bounds.Dx()
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srcHeight := bounds.Dy()
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// 计算目标高度
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targetHeight = int(float64(srcHeight) * (float64(targetWidth) / float64(srcWidth)))
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// 创建目标图片
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dstImg := imaging.Resize(srcImg, targetWidth, targetHeight, imaging.Lanczos)
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// image.NewRGBA(image.Rect(0, 0, targetWidth, targetHeight))
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// 使用高质量的滤波算法进行缩放
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// draw.CatmullRom.Scale(dstImg, dstImg.Bounds(), srcImg, srcImg.Bounds(), draw.Over, nil)
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// Save
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// 相关路径不存在，创建目录
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dstFolderPath := filepath.Dir(dstPath)
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if _, err = os.Stat(dstFolderPath); err != nil {
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if err = os.MkdirAll(dstFolderPath, os.ModePerm); err != nil {
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variable.ZapLog.Error("文件上传创建目录出错" + err.Error())
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return
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}
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}
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err = imaging.Save(dstImg, dstPath)
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return
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}
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