func worker(q <-chan *job) {
for {
j := <-q
j.updateStatus("Prepping data", "downloading source image")
resp, err := http.Get(j.mainImgUrl)
if err != nil {
j.updateStatus("Done", "error downloading image")
log.Println(err)
continue
}
img, _, err := image.Decode(resp.Body)
if err != nil {
j.updateStatus("Done", "error decoding image")
log.Println(err)
continue
}
j.updateStatus(j.status.Status, "verifying library")
lib, ok := collections[j.gallery]
if !ok {
j.updateStatus("Done", "error: gallery does not exist")
continue
}
j.updateStatus("Building mosaic", "")
reporter := make(chan float64)
done := make(chan struct{})
var mosaic image.Image
go func() {
mosaic = mosaics.BuildMosaicFromLibrary(img, lib.library, reporter)
close(done)
}()
Loop:
for {
select {
case pct := <-reporter:
j.updateStatus("Building mosaic", fmt.Sprintf("%.2f%% percent complete", pct))
case <-done:
break Loop
}
}
j.updateStatus("Encoding image", "")
buf := &bytes.Buffer{}
jpeg.Encode(buf, mosaic, &jpeg.Options{30})
j.updateStatus("Done", fmt.Sprintf("<img width=1000px src='data:image/jpg;base64,%s'/><br/>Right click to save.<br/><a href='/options'>Build another!</a>", base64.StdEncoding.EncodeToString(buf.Bytes())))
}
}
func main() {
flag.Parse()
var comparision mosaics.Evaluator
if *grid == 0 {
comparision = mosaics.AveragingEvaluator()
} else {
comparision = mosaics.GridEvaluator(*grid)
}
lib := mosaics.NewLibrary(comparision)
files, err := ioutil.ReadDir(*thumbDir)
if err != nil {
check(err)
}
log.Println("Loading thumbnails...")
for _, file := range files {
img := parseFile(*thumbDir, file.Name())
lib.AddImage(img)
}
log.Println("Loading target image...")
var r io.Reader
if (*img)[0:4] == "http" {
resp, err := http.Get(*img)
check(err)
r = resp.Body
} else {
f, err := os.Open(*img)
check(err)
defer f.Close()
r = f
}
progress := make(chan float64)
go func() {
for pct := range progress {
log.Printf("%.2f percent done\n", pct)
}
}()
if !*doGif {
target, _, err := image.Decode(r)
check(err)
log.Println("Building mosaic...")
mos := mosaics.BuildMosaicFromLibrary(target, lib, progress)
output, err := os.Create(*outputFile)
check(err)
defer output.Close()
err = jpeg.Encode(output, mos, &jpeg.Options{20})
check(err)
} else {
g, err := gif.DecodeAll(r)
check(err)
log.Println("Building mosaic...")
mos, err := mosaics.BuildGifzaic(g, lib, progress)
check(err)
output, err := os.Create(*outputFile)
check(err)
defer output.Close()
err = gif.EncodeAll(output, mos)
check(err)
}
}
