commit 023563f7139715c97e3cb62c62fe417719e57904
Author: elee <eddy@gfxlabs.io>
Date:   Fri Mar 25 00:14:03 2022 -0500

    file reading

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..5b9c917
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,10 @@
+bin/
+out/
+dist/
+
+
+*.exe
+*.out
+*.bin
+
+*test.png
diff --git a/common/nori/animation.go b/common/nori/animation.go
new file mode 100644
index 0000000..d9bafb7
--- /dev/null
+++ b/common/nori/animation.go
@@ -0,0 +1,139 @@
+package nori
+
+import (
+	"bufio"
+	"encoding/binary"
+	"io"
+)
+
+type Frame struct {
+	Duration        uint32
+	PlaneCount      uint32
+	Planes          []*Plane
+	CoordinateCount uint32
+	Coordinates     [][2]uint32
+	Unknown1        string
+	Sound_effect    string
+	Unknown2        string
+	Camp            CampSection
+}
+type CampSection struct {
+	Params [7]uint32
+	Array  []byte
+	Extra  string
+}
+
+type Animation struct {
+	Title string
+
+	// std::vector<uint32> frame_offsets
+	FrameCount uint32
+	Frames     []*Frame
+}
+
+func (a *Animation) Decode(rd *bufio.Reader, version int) error {
+	if err := binary.Read(rd, end, &a.FrameCount); err != nil {
+		return err
+	}
+	a.Frames = make([]*Frame, int(a.FrameCount))
+	for i := range a.Frames {
+		cf := &Frame{}
+		a.Frames[i] = cf
+		if err := binary.Read(rd, end, &cf.Duration); err != nil {
+			return err
+		}
+
+		if err := binary.Read(rd, end, &cf.PlaneCount); err != nil {
+			return err
+		}
+
+		cf.Planes = make([]*Plane, int(cf.PlaneCount))
+		for i := range cf.Planes {
+			cp := &Plane{}
+			cf.Planes[i] = cp
+			if err := binary.Read(rd, end, &cp.PlaneX); err != nil {
+				return err
+			}
+
+			if err := binary.Read(rd, end, &cp.PlaneY); err != nil {
+				return err
+			}
+
+			if err := binary.Read(rd, end, &cp.Opacity); err != nil {
+				return err
+			}
+			if err := binary.Read(rd, end, &cp.RenderFlag); err != nil {
+				return err
+			}
+			if err := binary.Read(rd, end, &cp.FlagParam); err != nil {
+				return err
+			}
+		}
+		if version != 300 {
+			if err := binary.Read(rd, end, &cf.CoordinateCount); err != nil {
+				return err
+			}
+			cf.Coordinates = make([][2]uint32, cf.CoordinateCount)
+			for i := range cf.Coordinates {
+				if err := binary.Read(rd, end, cf.Coordinates[i]); err != nil {
+					return err
+				}
+			}
+		}
+		switch version {
+		case 300, 301:
+			if _, err := rd.Discard(144); err != nil {
+				return err
+			}
+		case 302, 303:
+			if _, err := rd.Discard(96); err != nil {
+				return err
+			}
+		}
+		if version >= 302 {
+			// entry blocks
+			if _, err := rd.Discard(28 * 6); err != nil {
+				return err
+			}
+		}
+		// unknown1
+		if _, err := rd.Discard(44); err != nil {
+			return err
+		}
+		//sound_effect
+		if _, err := rd.Discard(18); err != nil {
+			return err
+		}
+		// unknown2
+		if _, err := rd.Discard(18); err != nil {
+			return err
+		}
+		var cast uint32
+
+		if err := binary.Read(rd, end, &cast); err != nil {
+			return err
+		}
+		if version > 303 && (cast > 1) {
+			cf.Camp = CampSection{}
+			if err := binary.Read(rd, end, &cf.Camp.Params); err != nil {
+				return err
+			}
+			sz := int(cf.Camp.Params[1]) * int(cf.Camp.Params[2])
+			cf.Camp.Array = make([]byte, sz)
+			if _, err := io.ReadFull(rd, cf.Camp.Array); err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}
+
+type Plane struct {
+	Bitmap_id  uint32
+	PlaneX     int32
+	PlaneY     int32
+	Opacity    uint32
+	Blend      BlendMode
+	FlagParam  uint32
+	RenderFlag uint32
+}
diff --git a/common/nori/blend.go b/common/nori/blend.go
new file mode 100644
index 0000000..d5188ea
--- /dev/null
+++ b/common/nori/blend.go
@@ -0,0 +1,18 @@
+package nori
+
+type BlendMode uint32
+
+var (
+	BlendMode_None  BlendMode = 0
+	BlendMode_Alpha BlendMode = 1
+	// Blend_ALPHA
+	BlendMode_InvertMul BlendMode = 2
+	// Color_Invert | Blend_MUL
+	BlendMode_Unknown3   BlendMode = 3
+	BlendMode_Add        BlendMode = 4
+	BlendMode_InvertMul5 BlendMode = 5
+	// Color_Invert | Blend_MUL
+	BlendMode_Mul  BlendMode = 6
+	BlendMode_Mul7 BlendMode = 7
+	BlendMode_Add8 BlendMode = 8
+)
diff --git a/common/nori/image.go b/common/nori/image.go
new file mode 100644
index 0000000..b5b6a20
--- /dev/null
+++ b/common/nori/image.go
@@ -0,0 +1,71 @@
+package nori
+
+import (
+	"bufio"
+	"encoding/binary"
+	"fmt"
+	"image"
+	"image/color"
+	"io"
+)
+
+type Image struct {
+	Bpp     uint32
+	Count   uint32
+	Delay   uint32
+	OffsetX int32
+	OffsetY int32
+
+	Width  uint32
+	Height uint32
+
+	Size uint32
+	Data []byte
+
+	Frame image.Image
+}
+
+func (i *Image) Decode(rd *bufio.Reader) 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")
+	case 16:
+		var bgr uint16
+		for idx := 0; idx < int(i.Size/2); idx++ {
+			if err := binary.Read(rd, end, &bgr); err != nil {
+				return err
+			}
+			red := uint8(((0x7c00 & bgr) >> 10) * 255 / 31)
+			green := uint8(((0x3e0 & bgr) >> 5) * 255 / 31)
+			blue := uint8((0x1f & bgr) * 255 / 31)
+			if red != 0 && blue != 0 && green != 0 {
+			}
+			col := &color.RGBA{
+				red, green, blue,
+				0xff,
+			}
+			cf.Set(idx%int(i.Width), idx/int(i.Width), col)
+		}
+		return nil
+	case 24:
+		i.Data = make([]byte, i.Size)
+		for idx := 0; idx < int(i.Size/3); idx++ {
+			rgb := [3]byte{}
+			_, err := io.ReadFull(rd, rgb[:])
+			if err != nil {
+				return err
+			}
+			col := &color.RGBA{
+				rgb[0], rgb[1], rgb[2],
+				0xff,
+			}
+			cf.Set(idx%int(i.Width), idx/int(i.Width), col)
+		}
+		return nil
+	default:
+		return fmt.Errorf("unsupported bpp, %d", i.Bpp)
+	}
+}
diff --git a/common/nori/nori.go b/common/nori/nori.go
new file mode 100644
index 0000000..4544e1c
--- /dev/null
+++ b/common/nori/nori.go
@@ -0,0 +1,40 @@
+package nori
+
+type PaletteSection struct {
+	Version    uint32
+	Param01    uint32
+	Param02    uint32
+	Param03    uint32
+	Param04    uint32
+	Divided    bool
+	DataLength uint32
+	//   Graphics::Palette color_data
+}
+
+type GawiSection struct {
+	Version      uint32
+	Bpp          uint32
+	IsCompressed bool
+	Params       [4]uint32
+	BmpCount     uint32
+	Size         uint32
+
+	HasPalette bool
+	Palette    *PaletteSection
+	// std::vector<uint32> bmp_offsets
+	Images []*Image
+}
+
+type Nori struct {
+	Version        uint32
+	Params         [5]uint32
+	AnimationCount uint32
+	SizeNoGawi     uint32
+	TotalSize      uint32
+
+	Gawi           *GawiSection
+	Animations     []*Animation
+	AnimationByKey map[string]*Animation
+
+	lastSignature [4]byte
+}
diff --git a/common/nori/nori_test.go b/common/nori/nori_test.go
new file mode 100644
index 0000000..f18e194
--- /dev/null
+++ b/common/nori/nori_test.go
@@ -0,0 +1,30 @@
+package nori
+
+import (
+	"os"
+	"testing"
+)
+
+func TestParseFile1(t *testing.T) {
+	rd, err := os.OpenFile("./nori_test/test1.nri", os.O_RDONLY, 0666)
+	if err != nil {
+		t.Fatalf("open file: %s", err)
+	}
+	nori, err := NewReader(rd).Decode()
+	if err != nil {
+		t.Fatalf("decode: %s", err)
+	}
+	t.Logf("\n nori: %+v\n gawi: %+v", nori, nori.Gawi)
+}
+
+func TestParseFile2(t *testing.T) {
+	rd, err := os.OpenFile("./nori_test/test2.nri", os.O_RDONLY, 0666)
+	if err != nil {
+		t.Fatalf("open file: %s", err)
+	}
+	nori, err := NewReader(rd).Decode()
+	if err != nil {
+		t.Fatalf("decode: %s", err)
+	}
+	t.Logf("\n nori: %+v\n gawi: %+v", nori, nori.Gawi)
+}
diff --git a/common/nori/nori_test/test1.nri b/common/nori/nori_test/test1.nri
new file mode 100644
index 0000000..93e2ee3
Binary files /dev/null and b/common/nori/nori_test/test1.nri differ
diff --git a/common/nori/nori_test/test2.nri b/common/nori/nori_test/test2.nri
new file mode 100644
index 0000000..aa8f861
Binary files /dev/null and b/common/nori/nori_test/test2.nri differ
diff --git a/common/nori/reader.go b/common/nori/reader.go
new file mode 100644
index 0000000..23a1deb
--- /dev/null
+++ b/common/nori/reader.go
@@ -0,0 +1,165 @@
+package nori
+
+import (
+	"bufio"
+	"encoding/binary"
+	"fmt"
+	"io"
+)
+
+var end = binary.LittleEndian
+
+type Reader struct {
+	nori *Nori
+
+	r *bufio.Reader
+}
+
+func NewReader(rd io.Reader) *Reader {
+	o := &Reader{
+		nori: &Nori{},
+		r:    bufio.NewReader(rd),
+	}
+	return o
+}
+
+func (n *Reader) Decode() (*Nori, error) {
+	if _, err := io.ReadFull(n, n.nori.lastSignature[:]); err != nil {
+		return nil, err
+	}
+	if sig, target := string(n.nori.lastSignature[:]), "NORI"; sig != target {
+		return nil, fmt.Errorf("expected header %s, got %s", target, sig)
+	}
+	if err := binary.Read(n, end, &n.nori.Version); err != nil {
+		return nil, err
+	}
+	if err := binary.Read(n, end, n.nori.Params[:]); err != nil {
+		return nil, err
+	}
+	if err := binary.Read(n, end, &n.nori.AnimationCount); err != nil {
+		return nil, err
+	}
+	if err := binary.Read(n, end, &n.nori.SizeNoGawi); err != nil {
+		return nil, err
+	}
+	if err := binary.Read(n, end, &n.nori.TotalSize); err != nil {
+		return nil, err
+	}
+	if err := n.decodeGawi(); err != nil {
+		return nil, err
+	}
+	return n.nori, nil
+}
+
+func (n *Reader) decodeGawi() error {
+	g := &GawiSection{}
+	n.nori.Gawi = g
+	if _, err := io.ReadFull(n, n.nori.lastSignature[:]); err != nil {
+		return err
+	}
+	if sig, target := string(n.nori.lastSignature[:]), "GAWI"; sig != target {
+		return fmt.Errorf("bad sig: want %s, got %s", target, sig)
+	}
+	if err := binary.Read(n, end, &g.Version); err != nil {
+		return err
+	}
+	if g.Version != 300 {
+		return fmt.Errorf("bad ver: want 300, got %d", g.Version)
+	}
+	if err := binary.Read(n, end, &g.Bpp); err != nil {
+		return err
+	}
+	good := false
+	for _, v := range [3]uint32{8, 16, 24} {
+		if g.Bpp == v {
+			good = true
+		}
+	}
+	if !good {
+		return fmt.Errorf("bad bpp: %d", g.Bpp)
+	}
+	var container uint32
+	if err := binary.Read(n, end, &container); err != nil {
+		return err
+	}
+	g.IsCompressed = (container == 1)
+	if err := binary.Read(n, end, &container); err != nil {
+		return err
+	}
+	g.HasPalette = (container > 0)
+
+	if err := binary.Read(n, end, g.Params[:]); err != nil {
+		return err
+	}
+	if err := binary.Read(n, end, &g.BmpCount); err != nil {
+		return err
+	}
+	if err := binary.Read(n, end, &g.Size); err != nil {
+		return err
+	}
+	if g.HasPalette {
+		n.decodePalette()
+	}
+	if _, err := n.r.Discard(4 * int(g.BmpCount)); err != nil {
+		return err
+	}
+	g.Images = make([]*Image, int(g.BmpCount))
+	for i := range g.Images {
+		g.Images[i] = &Image{Bpp: g.Bpp}
+		if err := n.decodeImage(g.Images[i]); err != nil {
+			return err
+		}
+	}
+	if _, err := n.r.Discard(4 * int(n.nori.AnimationCount)); err != nil {
+		return err
+	}
+	n.nori.Animations = make([]*Animation, n.nori.AnimationCount)
+	return nil
+}
+
+func (n *Reader) decodePalette() error {
+	if sig, target := string(n.nori.lastSignature[:]), "PAL_"; sig != target {
+		return fmt.Errorf("bad sig: want %s, got %s", target, sig)
+	}
+	return nil
+}
+func (n *Reader) decodeImage(img *Image) error {
+	if err := binary.Read(n, end, &img.Count); err != nil {
+		return err
+	}
+	if img.Count != 1 {
+		return fmt.Errorf("img count should be 1")
+	}
+
+	if err := binary.Read(n, end, &img.Size); err != nil {
+		return err
+	}
+
+	if err := binary.Read(n, end, &img.Width); err != nil {
+		return err
+	}
+
+	if err := binary.Read(n, end, &img.Height); err != nil {
+		return err
+	}
+
+	if err := binary.Read(n, end, &img.Delay); err != nil {
+		return err
+	}
+
+	if err := binary.Read(n, end, &img.OffsetX); err != nil {
+		return err
+	}
+
+	if err := binary.Read(n, end, &img.OffsetY); err != nil {
+		return err
+	}
+	if err := img.Decode(n.r); err != nil {
+		return err
+	}
+	return nil
+}
+
+func (n *Reader) Read(b []byte) (int, error) {
+	return n.r.Read(b)
+}
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..f62b7f0
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,3 @@
+module git.tuxpa.in/a/gotagonist
+
+go 1.18