xpm

internal/builtins/xpm.go

@@ -0,0 +1,8 @@
+//go:build xpm || full
+// +build xpm full
+
+package builtins
+
+import (
+	_ "github.com/coalaura/ffwebp/internal/codec/xpm"
+)

internal/codec/xbm/xpm.go

@@ -0,0 +1,71 @@
+package xbm
+
+import (
+	"bytes"
+	"image"
+	"io"
+
+	"github.com/coalaura/xpm"
+
+	"github.com/coalaura/ffwebp/internal/codec"
+	"github.com/coalaura/ffwebp/internal/opts"
+	"github.com/urfave/cli/v3"
+)
+
+var name string
+
+func init() {
+	codec.Register(impl{})
+}
+
+type impl struct{}
+
+func (impl) String() string {
+	return "xpm"
+}
+
+func (impl) Extensions() []string {
+	return []string{"xpm"}
+}
+
+func (impl) CanEncode() bool {
+	return true
+}
+
+func (impl) Flags(flags []cli.Flag) []cli.Flag {
+	return append(flags,
+		&cli.StringFlag{
+			Name:        "xpm.name",
+			Usage:       "XPM: name of the image definition",
+			Value:       "image",
+			Destination: &name,
+		},
+	)
+}
+
+func (impl) Sniff(reader io.ReaderAt) (int, []byte, error) {
+	buf := make([]byte, 128)
+
+	n, err := reader.ReadAt(buf, 0)
+	if err != nil && err != io.EOF {
+		return 0, nil, err
+	}
+
+	buf = buf[:n]
+
+	if bytes.Contains(buf, []byte("/* XPM */")) && bytes.Contains(buf, []byte("bits[]")) {
+		return 90, buf, nil
+	}
+
+	return 0, nil, nil
+}
+
+func (impl) Decode(r io.Reader) (image.Image, error) {
+	return xpm.Decode(r)
+}
+
+func (impl) Encode(w io.Writer, img image.Image, _ opts.Common) error {
+	return xpm.Encode(w, img, xpm.XPMOptions{
+		Name: name,
+	})
+}