Memory Leak fix

* Fixed a memory leak inside ScreenshotImage class due to unsafe access and storage of list of renders

game/scripts/gui/_gui_.rpy

@@ -6,7 +6,7 @@ init offset = -2
 
 init python in gui:
     import store
-    from store import settings, ScreenshotImage
+    from store import settings
 
     init(1080, 600)
 
@@ -60,11 +60,11 @@ init python in gui:
         renpy.store.disable_game_menu()
         renpy.choice_for_skipping()
         renpy.pause(0.001) # Give renderer the chance to catch up with transitions
-        bg = ScreenshotImage.capture()
-        renpy.call_in_new_context("gui_init_context", bg, label, *args, **kwargs)
+        renpy.store.screenshot.capture()
+        renpy.call_in_new_context("gui_init_context", label, *args, **kwargs)
 
-label gui_init_context(bg, label, *args , **kwargs):
-    $ renpy.show("screenshot", what=bg, at_list=[Transform(size=(config.screen_width, config.screen_height))])
+label gui_init_context(label, *args , **kwargs):
+    $ renpy.show("screenshot", what=screenshot.image, at_list=[Transform(size=(config.screen_width, config.screen_height))])
     $ renpy.call(label, *args, **kwargs)
     return
 

game/scripts/utility/screenshot_image.rpy

@@ -1,25 +1,19 @@
 
 init -10 python:
-    class ScreenshotImage(im.ImageBase):
-        def __init__(self, root, **properties):
-            super(ScreenshotImage, self).__init__(root, **properties)
-            self.root = root
-            # self.cache = False
-            # Sometimes causes segfault, maybe only if cache = True?
+    class ScreenshotImage(NoRollback):
+        _image = None
 
-        def load(self):
-            sw, sh = config.screen_width, config.screen_height
-            render = renpy.display.render.render_screen(self.root, sw, sh)
-            return renpy.display.draw.screenshot(render)
+        def __init__(self):
+            pass
 
-        @staticmethod
-        def capture(retain=True):
-            if retain:
-                # Prevent the image from being recaptured after load
-                renpy.retain_after_load()
+        def capture(self):
+            self._image = Transform(im.Data(renpy.screenshot_to_bytes(None), "screenshot.png"), size=(config.screen_width, config.screen_height))
 
-            root = renpy.display.core.scene_lists().make_layer("screens", {})
-            return ScreenshotImage(root)
+        @property
+        def image(self):
+            return self._image
+
+    screenshot = ScreenshotImage()
 
     def displayable_to_file(d, path, size=(config.screen_width, config.screen_height), crop=None, coloralpha=(0, 255, 0)):
         crop = crop or (0, 0, size[0], size[1])