scripts-blender/addons/brushstroke_tools/settings.py

@@ -131,6 +131,9 @@ def set_brush_style(self, value):
     ng_name = f'BSBST-brushstroke.{value}'
     ng = utils.ensure_node_group(ng_name, [bs for bs in addon_prefs.brush_styles if bs.name==value][0].filepath)
 
+    #if ng.preview:
+    #    utils.set_preview(ng.preview.image_pixels_float)
+
     self.node_tree.nodes['Brush Style'].node_tree = ng
     self["brush_style"] = value
 

scripts-blender/addons/brushstroke_tools/utils.py

@@ -1,7 +1,7 @@
 import os, ast
 import bpy
 from bpy.app.handlers import persistent
-import math, shutil, errno
+import math, shutil, errno, numpy
 from bpy.app.handlers import persistent
 
 addon_version = (0,0,0)
@@ -528,6 +528,16 @@ def round_n(val, n):
     """
     return round(val, n-int(math.floor(math.log10(abs(val))))-1)
 
+def set_preview(pixels):
+    if not pixels:
+        return
+    preview_name = '.BSBST-preview'
+    preview_img = bpy.data.images.get(preview_name)
+    if not preview_img:
+        preview_img = bpy.data.images.new(preview_name, width=256, height=256, float_buffer=True, is_data=True)
+    
+    preview_img.pixels.foreach_set(pixels)
+
 def register():
     bpy.app.handlers.depsgraph_update_post.append(refresh_preset)