jpegxl

internal/builtins/jpegxl.go

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

internal/codec/jpegxl/jpegxl.go

@@ -0,0 +1,91 @@
+package jpegxl
+
+import (
+	"bytes"
+	"fmt"
+	"image"
+	"io"
+
+	jxl "github.com/gen2brain/jpegxl"
+
+	"github.com/coalaura/ffwebp/internal/codec"
+	"github.com/coalaura/ffwebp/internal/logx"
+	"github.com/coalaura/ffwebp/internal/opts"
+	"github.com/urfave/cli/v3"
+)
+
+var (
+	effort int
+)
+
+func init() {
+	codec.Register(impl{})
+}
+
+type impl struct{}
+
+func (impl) String() string {
+	return "jpegxl"
+}
+
+func (impl) Extensions() []string {
+	return []string{"jxl"}
+}
+
+func (impl) Flags(flags []cli.Flag) []cli.Flag {
+	return append(flags,
+		&cli.IntFlag{
+			Name:        "jpegxl.effort",
+			Usage:       "JPEG XL: encode effort (1=fast .. 10=slow). Default 7",
+			Value:       7,
+			Destination: &effort,
+			Validator: func(value int) error {
+				if value < 1 || value > 10 {
+					return fmt.Errorf("invalid jpegxl.effort: %d", value)
+				}
+				return nil
+			},
+		},
+	)
+}
+
+func (impl) Sniff(reader io.ReaderAt) (int, []byte, error) {
+	containerMagic := []byte{
+		0x00, 0x00, 0x00, 0x0C,
+		'j', 'x', 'l', ' ',
+		0x0D, 0x0A, 0x87, 0x0A,
+	}
+
+	buf := make([]byte, 12)
+
+	if _, err := reader.ReadAt(buf, 0); err != nil {
+		if err == io.EOF {
+			return 0, nil, nil
+		}
+
+		return 0, nil, err
+	}
+
+	if bytes.Equal(buf, containerMagic) {
+		return 100, containerMagic, nil
+	}
+
+	if buf[0] == 0xFF && buf[1] == 0x0A {
+		return 100, buf[:2], nil
+	}
+
+	return 0, nil, nil
+}
+
+func (impl) Decode(reader io.Reader) (image.Image, error) {
+	return jxl.Decode(reader)
+}
+
+func (impl) Encode(writer io.Writer, img image.Image, options opts.Common) error {
+	logx.Printf("jpegxl: quality=%d effort=%d\n", options.Quality, effort)
+
+	return jxl.Encode(writer, img, jxl.Options{
+		Quality: options.Quality,
+		Effort:  effort,
+	})
+}