/
gifexplode.go
52 lines (42 loc) · 1007 Bytes
/
gifexplode.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
package main
import (
"fmt"
"image"
"image/gif"
"image/png"
"log"
"os"
"sync"
)
func main() {
if len(os.Args) != 2 {
log.Fatalf("Missing the required filename parameter\n")
}
filename := os.Args[1]
var wg sync.WaitGroup
fh, err := os.Open(filename)
if err != nil {
log.Fatalf("Failed to open '%s' - {Error: %v}\n", filename, err)
}
gifs, err := gif.DecodeAll(fh)
if err != nil {
log.Fatalf("Failed to decode '%s' - {Error: %v}\n", filename, err)
}
wg.Add(len(gifs.Image))
for idx, image := range gifs.Image {
newFileName := fmt.Sprintf("%s.%d.png", filename, idx)
go writeImage(&wg, image, newFileName)
}
wg.Wait()
}
func writeImage(wg *sync.WaitGroup, image image.Image, filename string) {
defer wg.Done()
newFh, err := os.Create(filename)
if err != nil {
log.Fatalf("Failed to create the exploded GIF frame - {Error: %v}\n", err)
}
err = png.Encode(newFh, image)
if err != nil {
log.Fatalf("Failed save the exploded GIF frame - {Error: %v}\n", err)
}
}