Handle tkinter not importing and disable relevant test. Closes #1668

util/test/tests/D3D12/D3D12_RGP_Capture.py

@@ -2,10 +2,20 @@ import renderdoc as rd
 import rdtest
 import os
 
+try:
+    import tkinter
+except ImportError as ex:
+    tkinter = None
 
 class D3D12_RGP_Capture(rdtest.TestCase):
     demos_test_name = 'D3D12_Simple_Triangle'
 
+    def check_support(self):
+        if tkinter is None:
+            return False, 'tkinter is required but not available'
+        
+        return super().check_support()
+
     # Need to enable RGP mode before opening the capture
     def run(self):
         rd.SetConfigSetting("ExternalTool_RGPIntegration", "1")
@@ -18,7 +28,6 @@ class D3D12_RGP_Capture(rdtest.TestCase):
             rdtest.log.print("RGP capture not tested")
             return
 
-        import tkinter
 
         # On D3D12 we need to create a real window
         window = tkinter.Tk()