Update baketextures for data library referencing (AcademySoftwareFoun…

…dation#2074)

This changelist updates the baketextures.py script to take advantage of data library referencing. i.e. `Document::setDataLibrary`.

python/Scripts/baketextures.py

@@ -27,13 +27,7 @@ def main():
     parser.add_argument(dest="outputFilename", help="Filename of the output document.")
     opts = parser.parse_args()
 
-    doc = mx.createDocument()
-    try:
-        mx.readFromXmlFile(doc, opts.inputFilename)
-    except mx.ExceptionFileMissing as err:
-        print(err)
-        sys.exit(0)
-
+    # Load standard and custom data libraries.
     stdlib = mx.createDocument()
     searchPath = mx.getDefaultDataSearchPath()
     searchPath.append(os.path.dirname(opts.inputFilename))
@@ -48,21 +42,28 @@ def main():
                 libraryFolders.append(library)
     libraryFolders.extend(mx.getDefaultDataLibraryFolders())
     mx.loadLibraries(libraryFolders, searchPath, stdlib)
-    doc.importLibrary(stdlib)
 
+    # Read and validate the source document.
+    doc = mx.createDocument()
+    try:
+        mx.readFromXmlFile(doc, opts.inputFilename)
+        doc.setDataLibrary(stdlib)
+    except mx.ExceptionFileMissing as err:
+        print(err)
+        sys.exit(0)
     valid, msg = doc.validate()
     if not valid:
         print("Validation warnings for input document:")
         print(msg)
 
+    # Construct the texture baker.
     baseType = mx_render.BaseType.FLOAT if opts.hdr else mx_render.BaseType.UINT8
-
-
     if platform == "darwin" and not opts.useGlslBackend:
         baker = mx_render_msl.TextureBaker.create(opts.width, opts.height, baseType)
     else:
         baker = mx_render_glsl.TextureBaker.create(opts.width, opts.height, baseType)
 
+    # Bake materials to textures.
     if opts.average:
         baker.setAverageImages(True)
     baker.writeDocumentPerMaterial(opts.writeDocumentPerMaterial)