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30 lines
723 B
Go
30 lines
723 B
Go
package images
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import (
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"bytes"
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"io"
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"path/filepath"
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"strings"
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)
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/*
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* Preprocess image files on client side.
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* 1. possibly adjust the orientation
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* 2. resize the image to a width or height limit
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* 3. remove the exif data
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* Call this function on any file uploaded to SeaweedFS
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*
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*/
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func MaybePreprocessImage(filename string, data []byte, width, height int) (resized io.ReadSeeker, w int, h int) {
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ext := filepath.Ext(filename)
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ext = strings.ToLower(ext)
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switch ext {
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case ".png", ".gif":
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return Resized(ext, bytes.NewReader(data), width, height, "")
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case ".jpg", ".jpeg":
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data = FixJpgOrientation(data)
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return Resized(ext, bytes.NewReader(data), width, height, "")
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}
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return bytes.NewReader(data), 0, 0
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}
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