mirror of
https://github.com/axllent/goptimize.git
synced 2024-06-18 06:25:44 +00:00
First commit
This commit is contained in:
Ralph Slooten
parent
8c24d3c7d9
commit
c2a4f94de5
2
.gitignore
vendored
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2
.gitignore
vendored
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@ -0,0 +1,2 @@
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/dist/
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goptimize
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24
Makefile
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24
Makefile
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@ -0,0 +1,24 @@
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TAG=`git describe --tags`
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VERSION ?= `git describe --tags`
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LDFLAGS=-ldflags "-s -extldflags \"--static\" -w -X main.version=${VERSION}"
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build = echo "\n\nBuilding $(1)-$(2)" && GOOS=$(1) GOARCH=$(2) go build ${LDFLAGS} -o dist/goptimize_${VERSION}_$(1)_$(2) \
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&& bzip2 dist/goptimize_${VERSION}_$(1)_$(2)
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goptimize: *.go
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go get github.com/disintegration/imaging
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go build ${LDFLAGS} -o goptimize
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rm -rf /tmp/go-*
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clean:
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rm -f goptimize
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release:
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mkdir -p dist
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rm -f dist/goptimize_${VERSION}_*
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$(call build,linux,amd64)
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$(call build,linux,386)
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$(call build,linux,arm)
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$(call build,linux,arm64)
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$(call build,darwin,amd64)
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$(call build,darwin,386)
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260
goptimize.go
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260
goptimize.go
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@ -0,0 +1,260 @@
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package main
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import (
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"fmt"
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"image/gif"
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"image/jpeg"
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"image/png"
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"io"
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"io/ioutil"
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"math"
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"os"
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"os/exec"
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"path/filepath"
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"github.com/disintegration/imaging"
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"golang.org/x/image/bmp"
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"golang.org/x/image/tiff"
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)
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// Goptimize downscales and optimizes an existing image
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func Goptimize(file string) {
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info, err := os.Stat(file)
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if err != nil {
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fmt.Printf("%s doesn't exist\n", file)
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return
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}
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if !info.Mode().IsRegular() {
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// not a file
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fmt.Printf("%s is not a file\n", file)
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return
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}
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// open original, rotate if neccesary
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src, err := imaging.Open(file, imaging.AutoOrientation(true))
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if err != nil {
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fmt.Printf("%v (%s)\n", err, file)
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return
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}
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format, err := imaging.FormatFromFilename(file)
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if err != nil {
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fmt.Printf("Cannot detect format: %v\n", err)
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return
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}
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outFilename := filepath.Base(file)
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outDir := filepath.Dir(file)
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dstFile := filepath.Join(outDir, outFilename)
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if outputDir != "" {
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dstFile = filepath.Join(outputDir, outFilename)
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}
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// get original image size
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srcBounds := src.Bounds()
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srcW := srcBounds.Dx()
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srcH := srcBounds.Dy()
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// Ensure scaling does not upscale image
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imgMaxW := maxWidth
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if imgMaxW == 0 || imgMaxW > srcW {
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imgMaxW = srcW
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}
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imgMaxH := maxHeight
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if imgMaxH == 0 || imgMaxH > srcH {
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imgMaxH = srcH
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}
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resized := imaging.Fit(src, imgMaxW, imgMaxH, imaging.Lanczos)
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dstBounds := resized.Bounds()
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resultW := dstBounds.Dx()
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resultH := dstBounds.Dy()
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tmpFile, err := ioutil.TempFile(os.TempDir(), "Goptimized-")
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if err != nil {
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fmt.Printf("Cannot create temporary file: %v\n", err)
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return
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}
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defer os.Remove(tmpFile.Name())
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if format.String() == "JPEG" {
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err = jpeg.Encode(tmpFile, resized, &jpeg.Options{Quality: quality})
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} else if format.String() == "PNG" {
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err = png.Encode(tmpFile, resized)
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} else if format.String() == "GIF" {
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err = gif.Encode(tmpFile, resized, nil)
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} else if format.String() == "TIFF" {
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err = tiff.Encode(tmpFile, resized, nil)
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} else if format.String() == "BMP" {
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err = bmp.Encode(tmpFile, resized)
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} else {
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fmt.Printf("Cannot Goptimize %s files\n", format.String())
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return
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}
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if err != nil {
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fmt.Printf("Error saving output file: %v\n", err)
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return
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}
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// get the tempoary filename before closing
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tmpFilename := tmpFile.Name()
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// close the temp file to release pointers so we can
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// modify it with system processes
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tmpFile.Close()
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// optimize
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if format.String() == "JPEG" {
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// run one or the other, both don't do anything
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if jpegtran != "" {
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RunOptimiser(tmpFilename, true, jpegtran, "-optimize", "-outfile")
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} else if jpegoptim != "" {
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RunOptimiser(tmpFilename, false, jpegoptim, "-f", "-s", "-o")
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}
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} else if format.String() == "PNG" {
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if pngquant != "" {
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RunOptimiser(tmpFilename, true, pngquant, "-f", "--output")
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}
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if optipng != "" {
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RunOptimiser(tmpFilename, true, optipng, "-out")
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}
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} else if format.String() == "GIF" {
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if gifsicle != "" {
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RunOptimiser(tmpFilename, true, gifsicle, "-o")
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}
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}
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// re-open potentiall modified temporary file
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tmpFile, err = os.Open(tmpFilename)
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if err != nil {
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fmt.Printf("Error reopening temporary file: %v\n", err)
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return
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}
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defer tmpFile.Close()
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// original file stats
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srcStat, _ := os.Stat(file)
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srcSize := srcStat.Size()
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// optimized file stats
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dstStat, _ := tmpFile.Stat()
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dstSize := dstStat.Size()
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// transfer the original file permissions to the new file
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if err = os.Chmod(tmpFile.Name(), srcStat.Mode()); err != nil {
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fmt.Printf("Error setting file permissions: %v\n", err)
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return
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}
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if !skipPreserveModTimes {
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// transfer original modification times
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mtime := srcStat.ModTime()
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atime := mtime // use mtime as we cannot get atime
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if err := os.Chtimes(tmpFile.Name(), atime, mtime); err != nil {
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fmt.Printf("Error setting file timestamp: %v\n", err)
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}
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}
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savedPercent := 100 - math.Round(float64(dstSize)/float64(srcSize)*100)
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if dstSize < srcSize {
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// output is smaller
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if err := os.Rename(tmpFile.Name(), dstFile); err != nil {
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fmt.Printf("Error renaming file: %v\n", err)
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return
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}
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fmt.Printf("Goptimized %s (%dx%d %s/%s %v%%)\n", dstFile, resultW, resultH, ByteCountSI(dstSize), ByteCountSI(srcSize), savedPercent)
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} else {
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if outputDir != "" {
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// just copy the original
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if err := os.Rename(file, dstFile); err != nil {
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fmt.Printf("Error renaming file: %v\n", err)
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return
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}
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}
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// we didn't actually any scaling optimizing
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fmt.Printf("Goptimized %s (%dx%d %s/%s %v%%)\n", dstFile, srcW, srcH, ByteCountSI(srcSize), ByteCountSI(srcSize), 0)
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}
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}
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// RunOptimiser will run the specified command on a copy of the original file
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// and overwrite if the output is smaller than the original
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func RunOptimiser(src string, outfile bool, args ...string) {
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// create a new temp file
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tmpFile, err := ioutil.TempFile(os.TempDir(), "Goptimized-")
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if err != nil {
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fmt.Printf("Cannot create temporary file: %v\n", err)
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return
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}
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defer os.Remove(tmpFile.Name())
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source, err := os.Open(src)
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// s, _ := source.Stat()
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// log.Printf("%v\n", s.Size())
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if err != nil {
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fmt.Printf("Cannot open temporary file: %v\n", err)
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return
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}
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defer source.Close()
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if _, err := io.Copy(tmpFile, source); err != nil {
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fmt.Printf("Cannot copy source file: %v\n", err)
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return
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}
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// add the filename to the args
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args = append(args, tmpFile.Name())
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if outfile {
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// most commands require a second filename to overwrite the original
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args = append(args, tmpFile.Name())
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}
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// fmt.Println(args)
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// execute the command
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cmd := exec.Command(args[0], args[1:]...)
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err = cmd.Run()
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// out, err := cmd.Output()
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if err != nil {
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// there was an error
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fmt.Printf("%s: %v\n", args[0], err)
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return
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}
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// fmt.Println(string(out))
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tmpFilename := tmpFile.Name()
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srcStat, _ := source.Stat()
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srcSize := srcStat.Size()
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dstStat, _ := os.Stat(tmpFilename)
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dstSize := dstStat.Size()
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// ensure file pointers are closed before renaming
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tmpFile.Close()
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source.Close()
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if dstSize < srcSize {
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if err := os.Rename(tmpFilename, src); err != nil {
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fmt.Printf("Error renaming file: %v\n", err)
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return
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}
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// fmt.Println(args[0], "=", srcSize, "to", dstSize, "(wrote to", source.Name(), ")")
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} else {
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// fmt.Println(args[0], "!=", srcSize, "to", dstSize)
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}
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}
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// ByteCountSI returns a human readable size from int64 bytes
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func ByteCountSI(b int64) string {
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const unit = 1000
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if b < unit {
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return fmt.Sprintf("%dB", b)
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}
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div, exp := int64(unit), 0
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for n := b / unit; n >= unit; n /= unit {
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div *= unit
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exp++
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}
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return fmt.Sprintf("%.1f%cB", float64(b)/float64(div), "kMGTPE"[exp])
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}
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117
main.go
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117
main.go
Normal file
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@ -0,0 +1,117 @@
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package main
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import (
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"flag"
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"fmt"
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"os"
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"os/exec"
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"regexp"
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"strconv"
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)
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var (
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quality int
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maxWidth int
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maxHeight int
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outputDir string
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skipPreserveModTimes bool
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jpegoptim string
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jpegtran string
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optipng string
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pngquant string
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gifsicle string
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)
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func main() {
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// modify the default help
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flag.Usage = func() {
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fmt.Println("Re-save & resample images, with optional optimization.")
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fmt.Printf("\nUsage: %s [options] <images>\n", os.Args[0])
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fmt.Println("\nOptions:")
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flag.PrintDefaults()
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fmt.Println("\nExamples:")
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fmt.Printf(" %s -s 800x800 *.jpg\n", os.Args[0])
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fmt.Printf(" %s -o out/ -q 90 -s 1600x1600 *.jpg\n", os.Args[0])
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fmt.Println("\nOtimizers:")
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if err := displayDelectedOptimizer("jpegtran ", jpegtran); err != nil {
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displayDelectedOptimizer("jpegoptim", jpegoptim)
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}
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displayDelectedOptimizer("optipng ", optipng)
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displayDelectedOptimizer("pngquant ", pngquant)
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displayDelectedOptimizer("gifsicle ", gifsicle)
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}
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var maxSizes string
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flag.IntVar(&quality, "q", 75, "Quality - affects jpeg only")
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flag.StringVar(&outputDir, "o", "", "Output directory (default overwrites original)")
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flag.BoolVar(&skipPreserveModTimes, "n", false, "Do not preserve file modification times")
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flag.StringVar(&maxSizes, "m", "", "Scale down to a maximum width & height. Format must be <width>x<height>.")
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// third-party optimizers
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flag.StringVar(&gifsicle, "gifsicle", "gifsicle", "Alternative gifsicle name")
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flag.StringVar(&jpegoptim, "jpegoptim", "jpegoptim", "Alternative jpegoptim name")
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flag.StringVar(&jpegtran, "jpegtran", "jpegtran", "Alternative jpegtran name")
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flag.StringVar(&optipng, "optipng", "optipng", "Alternative optipng name")
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flag.StringVar(&pngquant, "pngquant", "pngquant", "Alternative pngquant name")
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// parse flags
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flag.Parse()
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// detect optimizer paths
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gifsicle, _ = exec.LookPath(gifsicle)
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jpegoptim, _ = exec.LookPath(jpegoptim)
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jpegtran, _ = exec.LookPath(jpegtran)
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optipng, _ = exec.LookPath(optipng)
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pngquant, _ = exec.LookPath(pngquant)
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if len(flag.Args()) < 1 {
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flag.Usage()
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return
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}
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if maxSizes != "" {
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// calculate max sizes from arg[0]
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r := regexp.MustCompile(`^(\d+)(x|X|\*|:)(\d+)$`)
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matches := r.FindStringSubmatch(maxSizes)
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if len(matches) != 4 {
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flag.Usage()
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return
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}
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maxWidth, _ = strconv.Atoi(matches[1])
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maxHeight, _ = strconv.Atoi(matches[3])
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}
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// parse arguments
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args := flag.Args()
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if outputDir != "" {
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// ensure the output directory exists
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if _, err := os.Stat(outputDir); os.IsNotExist(err) {
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err := os.MkdirAll(outputDir, os.ModePerm)
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if err != nil {
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fmt.Printf("Cannot create output directory: %s\n", outputDir)
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return
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}
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}
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}
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for _, img := range args {
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Goptimize(img)
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}
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}
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// displayDelectedOptimizer prints whether the optimizer was found
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func displayDelectedOptimizer(name, bin string) error {
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exe, err := exec.LookPath(bin)
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if err != nil {
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// fmt.Printf(" - %s: [undetected]\n", name)
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return err
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}
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fmt.Printf(" - %s: %s\n", name, exe)
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return nil
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}
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