1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
|
package pngmeta
import (
"bytes"
"elefant/models"
"encoding/base64"
"encoding/binary"
"encoding/json"
"errors"
"fmt"
"image"
"image/color"
"image/png"
"io"
"os"
"path/filepath"
"testing"
)
func TestReadMeta(t *testing.T) {
cases := []struct {
Filename string
}{
{
Filename: "../sysprompts/llama.png",
},
}
for i, tc := range cases {
t.Run(fmt.Sprintf("test_%d", i), func(t *testing.T) {
// Call the readMeta function
pembed, err := extractChar(tc.Filename)
if err != nil {
t.Errorf("Expected no error, but got %v", err)
}
v, err := pembed.GetDecodedValue()
if err != nil {
t.Errorf("Expected no error, but got %v\n", err)
}
fmt.Printf("%+v\n", v.Simplify("Adam", tc.Filename))
})
}
}
// Test helper: Create a simple PNG image with test shapes
func createTestImage(t *testing.T) string {
img := image.NewRGBA(image.Rect(0, 0, 200, 200))
// Fill background with white
for y := 0; y < 200; y++ {
for x := 0; x < 200; x++ {
img.Set(x, y, color.White)
}
}
// Draw a red square
for y := 50; y < 150; y++ {
for x := 50; x < 150; x++ {
img.Set(x, y, color.RGBA{R: 255, A: 255})
}
}
// Draw a blue circle
center := image.Point{100, 100}
radius := 40
for y := center.Y - radius; y <= center.Y+radius; y++ {
for x := center.X - radius; x <= center.X+radius; x++ {
dx := x - center.X
dy := y - center.Y
if dx*dx+dy*dy <= radius*radius {
img.Set(x, y, color.RGBA{B: 255, A: 255})
}
}
}
// Create temp file
tmpDir := t.TempDir()
fpath := filepath.Join(tmpDir, "test-image.png")
f, err := os.Create(fpath)
if err != nil {
t.Fatalf("Error creating temp file: %v", err)
}
defer f.Close()
if err := png.Encode(f, img); err != nil {
t.Fatalf("Error encoding PNG: %v", err)
}
return fpath
}
func TestWriteToPng(t *testing.T) {
// Create test image
srcPath := createTestImage(t)
dstPath := filepath.Join(filepath.Dir(srcPath), "output.png")
// dstPath := "test.png"
// Create test metadata
metadata := &models.CharCardSpec{
Description: "Test image containing a red square and blue circle on white background",
}
// Embed metadata
if err := WriteToPng(metadata, srcPath, dstPath); err != nil {
t.Fatalf("WriteToPng failed: %v", err)
}
// Verify output file exists
if _, err := os.Stat(dstPath); os.IsNotExist(err) {
t.Fatalf("Output file not created: %v", err)
}
// Read and verify metadata
t.Run("VerifyMetadata", func(t *testing.T) {
data, err := os.ReadFile(dstPath)
if err != nil {
t.Fatalf("Error reading output file: %v", err)
}
// Verify PNG header
if string(data[:8]) != pngHeader {
t.Errorf("Invalid PNG header")
}
// Extract metadata
embedded := extractMetadata(t, data)
if embedded.Description != metadata.Description {
t.Errorf("Metadata mismatch\nWant: %q\nGot: %q",
metadata.Description, embedded.Description)
}
})
// Optional: Add cleanup if needed
// t.Cleanup(func() {
// os.Remove(dstPath)
// })
}
// Helper to extract embedded metadata from PNG bytes
func extractMetadata(t *testing.T, data []byte) *models.CharCardSpec {
r := bytes.NewReader(data[8:]) // Skip PNG header
for {
var length uint32
if err := binary.Read(r, binary.BigEndian, &length); err != nil {
if errors.Is(err, io.EOF) {
break
}
t.Fatalf("Error reading chunk length: %v", err)
}
chunkType := make([]byte, 4)
if _, err := r.Read(chunkType); err != nil {
t.Fatalf("Error reading chunk type: %v", err)
}
// Read chunk data
chunkData := make([]byte, length)
if _, err := r.Read(chunkData); err != nil {
t.Fatalf("Error reading chunk data: %v", err)
}
// Read and discard CRC
if _, err := r.Read(make([]byte, 4)); err != nil {
t.Fatalf("Error reading CRC: %v", err)
}
if string(chunkType) == embType {
parts := bytes.SplitN(chunkData, []byte{0}, 2)
if len(parts) != 2 {
t.Fatalf("Invalid tEXt chunk format")
}
decoded, err := base64.StdEncoding.DecodeString(string(parts[1]))
if err != nil {
t.Fatalf("Base64 decode error: %v", err)
}
var result models.CharCardSpec
if err := json.Unmarshal(decoded, &result); err != nil {
t.Fatalf("JSON unmarshal error: %v", err)
}
return &result
}
}
t.Fatal("Metadata not found in PNG")
return nil
}
func readTextChunk(t *testing.T, r io.ReadSeeker) *models.CharCardSpec {
var length uint32
binary.Read(r, binary.BigEndian, &length)
chunkType := make([]byte, 4)
r.Read(chunkType)
data := make([]byte, length)
r.Read(data)
// Read CRC (but skip validation for test purposes)
crc := make([]byte, 4)
r.Read(crc)
parts := bytes.SplitN(data, []byte{0}, 2) // Split key-value pair
if len(parts) != 2 {
t.Fatalf("Invalid tEXt chunk format")
}
// key := string(parts[0])
value := parts[1]
decoded, err := base64.StdEncoding.DecodeString(string(value))
if err != nil {
t.Fatalf("Base64 decode error: %v; value: %s", err, string(value))
}
var result models.CharCardSpec
if err := json.Unmarshal(decoded, &result); err != nil {
t.Fatalf("JSON unmarshal error: %v", err)
}
return &result
}
|
