github.com/go-oss/image@v0.1.1-0.20230517025328-001b78555e78/imageutil/decode_example_test.go (about)

     1  // This example demonstrates decoding a JPEG image and remove EXIF, apply orientation.
     2  package imageutil_test
     3  
     4  import (
     5  	"encoding/base64"
     6  	"fmt"
     7  	"io/ioutil"
     8  	"log"
     9  	"strings"
    10  
    11  	"github.com/go-oss/image/imageutil"
    12  )
    13  
    14  func Example() {
    15  	reader := base64.NewDecoder(base64.StdEncoding, strings.NewReader(data))
    16  	img, err := imageutil.Decode(reader)
    17  	if err != nil {
    18  		log.Fatal(err)
    19  	}
    20  
    21  	// print metadata
    22  	fmt.Printf("Original MIME Type: %s\n", img.OriginalMIMEType)
    23  	fmt.Printf("Original Image Quality: %d\n", img.Quality)
    24  
    25  	// crop square
    26  	img.FitCrop()
    27  
    28  	// encode to jpeg image same original image quality
    29  	err = img.EncodeJPEG(ioutil.Discard)
    30  	if err != nil {
    31  		log.Fatal(err)
    32  	}
    33  }
    34  
    35  const data = `
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