dog

common/nori/animation.go

@@ -109,7 +109,6 @@ func (a *Animation) Decode(rd *bufio.Reader, version int) error {
 			return err
 		}
 		var cast uint32
-
 		if err := binary.Read(rd, end, &cast); err != nil {
 			return err
 		}

common/nori/export.go

@@ -0,0 +1,19 @@
+package nori
+
+import "gitlab.com/gfxlabs/gfximg/apng"
+
+func (n *Nori) ExportAnimation() *apng.APNG {
+	g := n.Gawi
+	a := &apng.APNG{
+		Frames: make([]apng.Frame, 0, len(g.Images)),
+	}
+	for i := 0; i < len(g.Images); i++ {
+		fr := apng.Frame{
+			Image:            g.Images[i].Frame,
+			DelayNumerator:   uint16(g.Images[i].Delay),
+			DelayDenominator: 1000,
+		}
+		a.Frames = append(a.Frames, fr)
+	}
+	return a
+}

common/nori/image.go

@@ -25,13 +25,24 @@ type Image struct {
 	Frame image.Image
 }
 
-func (i *Image) Decode(rd *bufio.Reader) error {
+
+func (i *Image) Decode(rd *bufio.Reader, palette *PaletteSection) error {
 	cf := image.NewRGBA64(image.Rect(0, 0, int(i.Width), int(i.Height)))
 	i.Frame = cf
 	switch i.Bpp {
 	case 8:
-		rd.Discard(int(i.Size))
-		return fmt.Errorf("bpp = 8, but no palette")
+		if palette == nil {
+			return fmt.Errorf("bpp = 8, but no palette")
+		}
+		for idx := 0; idx < int(i.Size); idx++ {
+			b, err := rd.ReadByte()
+			if err != nil {
+				return err
+			}
+			col := palette.Palette[b]
+			cf.Set(idx%int(i.Width), idx/int(i.Width), col)
+		}
+		return nil
 	case 16:
 		var bgr uint16
 		for idx := 0; idx < int(i.Size/2); idx++ {
@@ -69,3 +80,4 @@ func (i *Image) Decode(rd *bufio.Reader) error {
 		return fmt.Errorf("unsupported bpp, %d", i.Bpp)
 	}
 }
+

common/nori/nori.go

@@ -1,14 +1,14 @@
 package nori
 
+import "image/color"
+
 type PaletteSection struct {
 	Version    uint32
-	Param01    uint32
-	Param02    uint32
-	Param03    uint32
-	Param04    uint32
+	Params     [4]uint32
 	Divided    bool
 	DataLength uint32
-	//   Graphics::Palette color_data
+	Palette    [256]color.Color
+	MainBound  [2]uint32
 }
 
 type GawiSection struct {

common/nori/nori_test.go

@@ -1,8 +1,11 @@
 package nori
 
 import (
+	"bytes"
 	"os"
 	"testing"
+
+	"gitlab.com/gfxlabs/gfximg/apng"
 )
 
 func TestParseFile1(t *testing.T) {
@@ -28,3 +31,24 @@ func TestParseFile2(t *testing.T) {
 	}
 	t.Logf("\n nori: %+v\n gawi: %+v", nori, nori.Gawi)
 }
+
+func TestParsePalette(t *testing.T) {
+	rd, err := os.OpenFile("./nori_test/palette.nri", os.O_RDONLY, 0666)
+	if err != nil {
+		t.Logf("open file: %s", err)
+		t.Fail()
+	}
+	nori, err := NewReader(rd).Decode()
+	if err != nil {
+		t.Errorf("decode: %s", err)
+	}
+	t.Logf("\n nori: %+v\n gawi: %+v\n palette: %+v\n", nori, nori.Gawi, nori.Gawi.Palette)
+
+	out := new(bytes.Buffer)
+	a := nori.ExportAnimation()
+	err = apng.Encode(out, *a)
+	if err != nil {
+		t.Errorf("encode: %s", err)
+	}
+	os.WriteFile("./nori_test/palette.apng", out.Bytes(), 0740)
+}

common/nori/reader.go

@@ -4,6 +4,7 @@ import (
 	"bufio"
 	"encoding/binary"
 	"fmt"
+	"image/color"
 	"io"
 )
 
@@ -98,8 +99,11 @@ func (n *Reader) decodeGawi() error {
 		return err
 	}
 	if g.HasPalette {
-		n.decodePalette()
+		if err := n.decodePalette(); err != nil {
+			return err
+		}
 	}
+	fmt.Printf("\n-------\n n:'%+v'\n g:'%+v'", n, g)
 	if _, err := n.r.Discard(4 * int(g.BmpCount)); err != nil {
 		return err
 	}
@@ -118,9 +122,47 @@ func (n *Reader) decodeGawi() error {
 }
 
 func (n *Reader) decodePalette() error {
+	if _, err := io.ReadFull(n, n.nori.lastSignature[:]); err != nil {
+		return err
+	}
 	if sig, target := string(n.nori.lastSignature[:]), "PAL_"; sig != target {
 		return fmt.Errorf("bad sig: want %s, got %s", target, sig)
 	}
+	cp := &PaletteSection{
+		Palette: [256]color.Color{},
+	}
+	n.nori.Gawi.Palette = cp
+	if err := binary.Read(n, end, &cp.Version); err != nil {
+		return err
+	}
+	if err := binary.Read(n, end, cp.Params[:]); err != nil {
+		return err
+	}
+	var cast uint32
+	if err := binary.Read(n, end, &cast); err != nil {
+		return err
+	}
+	cp.Divided = (cast > 0)
+	if err := binary.Read(n, end, &cp.DataLength); err != nil {
+		return err
+	}
+	for i := 0; i < 256; i++ {
+		rgb := [3]byte{}
+		_, err := io.ReadFull(n, rgb[:])
+		if err != nil {
+			return err
+		}
+		cp.Palette[i] = &color.RGBA{
+			rgb[0], rgb[1], rgb[2],
+			0xff,
+		}
+	}
+
+	if cp.Divided {
+		if err := binary.Read(n, end, cp.MainBound[:]); err != nil {
+			return err
+		}
+	}
 	return nil
 }
 func (n *Reader) decodeImage(img *Image) error {
@@ -154,7 +196,7 @@ func (n *Reader) decodeImage(img *Image) error {
 	if err := binary.Read(n, end, &img.OffsetY); err != nil {
 		return err
 	}
-	if err := img.Decode(n.r); err != nil {
+	if err := img.Decode(n.r, n.nori.Gawi.Palette); err != nil {
 		return err
 	}
 	return nil

go.mod

@@ -1,3 +1,5 @@
 module git.tuxpa.in/a/gotagonist
 
 go 1.18
+
+require gitlab.com/gfxlabs/gfximg v0.0.5

go.sum

@@ -0,0 +1,2 @@
+gitlab.com/gfxlabs/gfximg v0.0.5 h1:jtHE6In6axz0zGPy7YnLIZV9RFdcFEZzpdqoXb52K9s=
+gitlab.com/gfxlabs/gfximg v0.0.5/go.mod h1:IAYZwCoqy3JFKwkKafragpfecp5Up6FFIzI7VvK2Zzo=