work in progress on dc6 sprite dump tool

formats/dc6/dc6.go

@@ -43,7 +43,7 @@ type Sprite struct {
 	Directions []Direction
 }
 
-func New(reader io.ReadSeeker) (*Sprite, error) {
+func NewFromReader(reader io.ReadSeeker) (*Sprite, error) {
 	sprite := new(Sprite)
 
 	var fileHead fileHeader

tools/dc6/dc6.go

@@ -0,0 +1,67 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"os"
+	"path"
+
+	"github.com/FooSoft/lazarus/formats/dat"
+	"github.com/FooSoft/lazarus/formats/dc6"
+)
+
+func loadPalette(path string) (*dat.Palette, error) {
+	fp, err := os.Open(path)
+	if err != nil {
+		return nil, err
+	}
+	defer fp.Close()
+	return dat.NewFromReader(fp)
+}
+
+func loadSprite(path string) (*dc6.Sprite, error) {
+	fp, err := os.Open(path)
+	if err != nil {
+		return nil, err
+	}
+	defer fp.Close()
+	return dc6.NewFromReader(fp)
+}
+
+func extractSprite(palettePath, spritePath, targetDir string) error {
+	_, err := loadPalette(palettePath)
+	if err != nil {
+		return err
+	}
+
+	_, err = loadSprite(spritePath)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func main() {
+	var (
+		targetDir = flag.String("target", ".", "target directory")
+	)
+
+	flag.Usage = func() {
+		fmt.Fprintf(os.Stderr, "Usage: %s [options] palette_file dc6_file\n", path.Base(os.Args[0]))
+		fmt.Fprintf(os.Stderr, "Parameters:\n\n")
+		flag.PrintDefaults()
+	}
+
+	flag.Parse()
+
+	if flag.NArg() < 2 {
+		flag.Usage()
+		os.Exit(2)
+	}
+
+	if err := extractSprite(flag.Arg(0), flag.Arg(1), *targetDir); err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+}