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added real color quantizer, number of colors works now

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This commit is contained in:
Antoni Sawicki 2019-06-06 01:06:36 -07:00
parent 89f5f556f9
commit 849239fc8e
1 changed files with 5 additions and 8 deletions
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13
wrp.go
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@ -12,9 +12,6 @@ import (
"context"
"flag"
"fmt"
"image"
"image/color/palette"
"image/draw"
"image/gif"
"image/png"
"log"
@ -31,6 +28,8 @@ import (
"github.com/chromedp/cdproto/cdp"
"github.com/chromedp/cdproto/dom"
"github.com/chromedp/chromedp"
"github.com/ericpauley/go-quantize/quantize"
)
// Ismap for server side processing
@ -101,7 +100,7 @@ func pageServer(out http.ResponseWriter, req *http.Request) {
fmt.Fprintf(out, "W <INPUT TYPE=\"TEXT\" NAME=\"w\" VALUE=\"%d\" SIZE=\"4\"> \n", w)
fmt.Fprintf(out, "H <INPUT TYPE=\"TEXT\" NAME=\"h\" VALUE=\"%d\" SIZE=\"4\"> \n", h)
fmt.Fprintf(out, "S <INPUT TYPE=\"TEXT\" NAME=\"s\" VALUE=\"%1.2f\" SIZE=\"3\"> \n", s)
//fmt.Fprintf(out, "C <INPUT TYPE=\"TEXT\" NAME=\"c\" VALUE=\"%d\" SIZE=\"3\"> \n", c)
fmt.Fprintf(out, "C <INPUT TYPE=\"TEXT\" NAME=\"c\" VALUE=\"%d\" SIZE=\"3\"> \n", c)
fmt.Fprintf(out, "</FORM><BR>\n")
if len(u) > 1 {
if strings.HasPrefix(u, "http") {
@ -197,10 +196,8 @@ func capture(gourl string, w int64, h int64, s float64, co int, p int64, i bool,
fmt.Fprintf(out, "<BR>Unable to decode page screenshot:<BR>%s<BR>\n", err)
return
}
pm := image.NewPaletted(img.Bounds(), palette.WebSafe)
draw.FloydSteinberg.Draw(pm, img.Bounds(), img, image.ZP)
gifbuf.Reset()
err = gif.Encode(&gifbuf, img, nil)
err = gif.Encode(&gifbuf, img, &gif.Options{NumColors: co, Quantizer: quantize.MedianCutQuantizer{}})
if err != nil {
log.Printf("%s Failed to encode GIF: %s\n", c, err)
fmt.Fprintf(out, "<BR>Unable to encode GIF:<BR>%s<BR>\n", err)
@ -209,7 +206,7 @@ func capture(gourl string, w int64, h int64, s float64, co int, p int64, i bool,
seq := rand.Intn(9999)
imgpath := fmt.Sprintf("/img/%04d.gif", seq)
mappath := fmt.Sprintf("/map/%04d.map", seq)
log.Printf("%s Encoded GIF image: %s, Size: %dKB\n", c, imgpath, len(gifbuf.Bytes())/1024)
log.Printf("%s Encoded GIF image: %s, Size: %dKB, Colors: %d\n", c, imgpath, len(gifbuf.Bytes())/1024, co)
gifmap[imgpath] = gifbuf
// Process Nodes