func main() {
var linecount int
var line []byte
var err error
file, expr := parseArgs()
src, dst := getImages(file)
for err != io.EOF {
linecount++
line, err = expr.ReadBytes('\n')
if err != nil && err != io.EOF {
fmt.Fprintf(os.Stderr, "Read expression: %v\n", err)
os.Exit(1)
}
ok, err := maplib.Parse(line, src, dst)
if err != nil {
fmt.Fprintf(os.Stderr, "Line %d: %v\n", linecount, err)
}
if ok {
src, dst = dst, src
}
}
err = lib.Encode(os.Stdout, "png", src, "")
if err != nil {
fmt.Fprintf(os.Stderr, "Write output image: %v\n", err)
os.Exit(1)
}
}
// save encodes the given image as PNG and saves it to stdout.
func save(img image.Image) {
err := lib.Encode(os.Stdout, "png", img, "")
if err != nil {
fmt.Fprintf(os.Stderr, "Encode image: %v\n", err)
os.Exit(1)
}
}
func main() {
file, format, options := parseArgs()
in, out := getStreams(file)
img, _, err := image.Decode(in)
if err != nil {
fmt.Fprintf(os.Stderr, "Invalid input file: %v\n", err)
return
}
err = lib.Encode(out, format, img, options)
if err != nil {
fmt.Fprintf(os.Stderr, "Encode failed: %v\n", err)
return
}
}