public static void ExportAtlas(string inputPath, string outputpath)
{
Console.WriteLine($"Loading asset file {inputPath}");
AssetsManager assetManager = LoadAssetManager(inputPath);
List <Texture2D> atlasTextures = new List <Texture2D>();
string gameVersion = string.Empty;
// find game version first
foreach (var file in assetManager.assetsFileList)
{
foreach (var obj in file.Objects)
{
switch (obj)
{
case TextAsset text:
if (text.m_Name == "version")
{
gameVersion = System.Text.Encoding.UTF8.GetString(text.m_Script);
}
break;
}
}
}
string gameversionOutputPath = Path.Combine(outputpath, gameVersion);
if (!Directory.Exists(gameversionOutputPath))
{
Directory.CreateDirectory(gameversionOutputPath);
}
string jsonOutputPath = Path.Combine(gameversionOutputPath, $"spriteData.json");
string spriteOutputDir = Path.Combine(gameversionOutputPath, $"sprites");
if (!Directory.Exists(spriteOutputDir))
{
Directory.CreateDirectory(spriteOutputDir);
}
if (File.Exists(jsonOutputPath))
{
File.Delete(jsonOutputPath);
}
using (var fs = File.OpenWrite(jsonOutputPath))
using (var json = new Utf8JsonWriter(fs, new JsonWriterOptions {
Indented = true
}))
{
json.WriteStartObject();
json.WriteString("gameVersion", gameVersion);
json.WriteString("unityAssetPath", inputPath);
json.WriteStartArray("imageData");
foreach (var file in assetManager.assetsFileList)
{
foreach (var obj in file.Objects)
{
switch (obj)
{
case Sprite spr:
bool foundAtlas = false;
if (spr.m_SpriteAtlas.TryGet(out var atlas))
{
if (atlas.m_RenderDataMap.TryGetValue(spr.m_RenderDataKey, out var spriteAtlasData) && spriteAtlasData.texture.TryGet(out var texture))
{
Console.WriteLine($"Found atlas texture {texture.m_Name}");
if (!atlasTextures.Contains(texture))
{
atlasTextures.Add(texture);
}
}
if (atlas.m_Name == "fiveFretAtlas")
{
foundAtlas = true;
}
}
if (!foundAtlas)
{
continue;
}
var image = SpriteHelper.GetImage(spr);
string filename = $"{spr.m_Name}_{spr.m_PathID}.png";
string filePath = Path.Combine(spriteOutputDir, filename);
image.Save(filePath, ImageFormat.Png);
byte[] hashData;
using (var f = File.OpenRead(filePath))
{
hashData = hash.ComputeHash(f);
}
string hashString = Convert.ToBase64String(hashData);
json.WriteStartObject();
json.WriteString("fileName", filename);
json.WriteString("name", spr.m_Name);
json.WriteString("hash", hashString);
json.WriteNumber("pathID", (int)spr.m_PathID);
json.WriteEndObject();
Console.WriteLine($"fiveFretAtlas Sprite {spr.m_Name} saved");
break;
case SpriteAtlas spriteAtlas:
Console.WriteLine($"Atlas {spriteAtlas.m_Name}");
break;
}
}
}
json.WriteEndArray();
json.WriteStartArray("spriteAtlas");
foreach (var texture in atlasTextures)
{
var bitmap = texture.ConvertToBitmap(false);
bitmap.RotateFlip(RotateFlipType.RotateNoneFlipY);
bitmap.Save(Path.Combine(gameversionOutputPath, $"{texture.m_Name}.png"), ImageFormat.Png);
Console.WriteLine($"Atlas texture2d {texture.m_Name} saved");
json.WriteStringValue(texture.m_Name);
}
json.WriteEndArray();
json.WriteEndObject();
}
}