violet/favicons/svg2png.go

30 lines
596 B
Go

package favicons
import (
"bytes"
"fmt"
"os/exec"
)
func svg2png(inkscapeCmd string, in []byte) (out []byte, err error) {
var stdout, stderr bytes.Buffer
cmd := exec.Command(inkscapeCmd, "--export-type", "png", "--export-filename", "-", "--export-background-opacity", "0", "--pipe")
cmd.Stdin = bytes.NewBuffer(in)
cmd.Stdout = &stdout
cmd.Stderr = &stderr
if e := cmd.Run(); e != nil {
err = fmt.Errorf("%s\nSTDERR:\n%s", e.Error(), stderr.String())
return
}
if stdout.Len() == 0 {
err = fmt.Errorf("got no data from inkscape")
return
}
out = stdout.Bytes()
return
}