import os 
 
# Substance 3D Painter modules 
import substance_painter.ui 
import substance_painter.export 
import substance_painter.project 
import substance_painter.textureset 
 
# PySide module to build custom UI 
from PySide2 import QtWidgets 
 
 
plugin_widgets = [] 
 
 
def export_textures() : 
 # Verify if a project is open before trying to export something 
 if not substance_painter.project.is_open() : 
  return 
 
 # Get the currently active layer stack (paintable) 
 stack = substance_painter.textureset.get_active_stack() 
 
 # Get the parent Texture Set of this layer stack 
 material = stack.material() 
 
 # Build Export Preset resource URL 
 # - Context: name of the library where the resource is located 
 # - Name: name of the resource (filename without extension or Substance graph path) 
 export_preset = substance_painter.resource.ResourceID( 
      context="starter_assets", 
      name="PBR Metallic Roughness" ) 
 
 print( "Preset:" ) 
 print( export_preset.url() ) 
 
 # Setup the export settings 
 resolution = material.get_resolution() 
  
 # Setup the export path, in this case the textures 
 # will be put next to the spp project file on the disk 
 Path = substance_painter.project.file_path() 
 Path = os.path.dirname(Path) + "/" 
 
 # Build the configuration 
 config = { 
  "exportShaderParams"  : False, 
  "exportPath"    : Path, 
  "exportList"   : [ { "rootPath" : str(stack) } ], 
  "exportPresets"   : [ { "name" : "default", "maps" : [] } ], 
  "defaultExportPreset"  : export_preset.url(), 
  "exportParameters"   : [ 
   { 
    "parameters" : { "paddingAlgorithm": "infinite" } 
   } 
  ] 
 } 
 
 substance_painter.export.export_project_textures( config ) 
 
 
def start_plugin(): 
 # Create a text widget for a menu 
 Action = QtWidgets.QAction("Custom Python Export",  
        triggered=export_textures) 
 
 # Add this widget to the existing File menu of the application 
 substance_painter.ui.add_action( 
  substance_painter.ui.ApplicationMenu.File, 
  Action ) 
 
 # Store the widget for proper cleanup later when stopping the plugin 
 plugin_widgets.append(Action) 
 
 
def close_plugin(): 
 # Remove all widgets that have been added to the UI 
 for widget in plugin_widgets: 
  substance_painter.ui.delete_ui_element(widget) 
 
 plugin_widgets.clear() 
 
 
if __name__ == "__main__": 
 start_plugin()