Render text working.

tools/assetstool/processimage.py

@@ -72,7 +72,24 @@ def processAlphaImage(asset):
   assetPath = asset['path']
   print(f"Processing alpha image: {assetPath}")
 
+  data = bytearray()
+  data.extend(b"DAI")  # Dusk Alpha Image
+  image = Image.open(assetPath).convert("RGBA")
+  data.extend(image.width.to_bytes(4, 'little'))   # Width
+  data.extend(image.height.to_bytes(4, 'little'))  # Height
+  for pixel in list(image.getdata()):
+    # Only write alpha channel
+    data.append(pixel[3].to_bytes(1, 'little')[0])  # Pixel alpha
+
+  relative = getAssetRelativePath(assetPath)
+  fileNameWithoutExt = os.path.splitext(os.path.basename(assetPath))[0]
+  outputFileRelative = os.path.join(os.path.dirname(relative), f"{fileNameWithoutExt}.dai")
+  outputFilePath = os.path.join(args.output_assets, outputFileRelative)
+  os.makedirs(os.path.dirname(outputFilePath), exist_ok=True)
+  with open(outputFilePath, "wb") as f:
+    f.write(data)
+
   outImage = {
-    "files": []
+    "files": [ outputFilePath ]
   }
   return outImage