From 9d1025359c7034774d4c6545ba7cb7710541e993 Mon Sep 17 00:00:00 2001
From: pushfoo <36696816+pushfoo@users.noreply.github.com>
Date: Fri, 15 Sep 2023 06:15:51 -0400
Subject: [PATCH 01/17] Allow SpriteList._atlas to be None by default

* Remove if wrapping setting _atlas in SpriteList.__init__

* Update conditional _atlas setting in SpriteList._init_deferred

* Update type annotations to make `SpriteList.atlas` optional
---
 arcade/sprite_list/sprite_list.py | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/arcade/sprite_list/sprite_list.py b/arcade/sprite_list/sprite_list.py
index b8de470e4..3777bd96b 100644
--- a/arcade/sprite_list/sprite_list.py
+++ b/arcade/sprite_list/sprite_list.py
@@ -105,8 +105,7 @@ def __init__(
         visible: bool = True,
     ):
         self.program = None
-        if atlas:
-            self._atlas: TextureAtlas = atlas
+        self._atlas: Optional[TextureAtlas] = atlas
         self._initialized = False
         self._lazy = lazy
         self._visible = visible
@@ -190,9 +189,8 @@ def _init_deferred(self):
 
         self.ctx = get_window().ctx
         self.program = self.ctx.sprite_list_program_cull
-        self._atlas: TextureAtlas = (
-            getattr(self, "_atlas", None) or self.ctx.default_atlas
-        )
+        if not self._atlas:
+            self._atlas =  self.ctx.default_atlas
 
         # Buffers for each sprite attribute (read by shader) with initial capacity
         self._sprite_pos_buf = self.ctx.buffer(reserve=self._buf_capacity * 12)  # 3 x 32 bit floats
@@ -371,7 +369,7 @@ def alpha_normalized(self, value: float):
         self._color = self._color[0], self._color[1], self._color[2], value
 
     @property
-    def atlas(self) -> "TextureAtlas":
+    def atlas(self) -> Optional["TextureAtlas"]:
         """Get the texture atlas for this sprite list"""
         return self._atlas
 

From 4e41b98839528fb12554d984cb4c2d98fb2f86b3 Mon Sep 17 00:00:00 2001
From: pushfoo <36696816+pushfoo@users.noreply.github.com>
Date: Fri, 15 Sep 2023 06:25:16 -0400
Subject: [PATCH 02/17] Update unit tests for SpriteList with None atlas

---
 tests/unit/spritelist/test_spritelist_lazy.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tests/unit/spritelist/test_spritelist_lazy.py b/tests/unit/spritelist/test_spritelist_lazy.py
index 8696ba2aa..ecfbc3fce 100644
--- a/tests/unit/spritelist/test_spritelist_lazy.py
+++ b/tests/unit/spritelist/test_spritelist_lazy.py
@@ -1,5 +1,6 @@
 import pytest
 import arcade
+from arcade import TextureAtlas
 
 
 def test_create():
@@ -14,6 +15,7 @@ def test_create():
     assert len(spritelist) == 100
     assert spritelist.spatial_hash is not None
     assert spritelist._initialized is False
+    assert spritelist.atlas is None
 
     arcade.set_window(None)
     with pytest.raises(RuntimeError):
@@ -30,4 +32,5 @@ def test_create_2(window):
     assert spritelist._initialized
     assert spritelist._sprite_pos_buf
     assert spritelist._geometry
+    assert isinstance(spritelist.atlas, TextureAtlas)
     spritelist.draw()

From 7fc4995fbaef0fd41adf9a3be549e71acecc4170 Mon Sep 17 00:00:00 2001
From: pushfoo <36696816+pushfoo@users.noreply.github.com>
Date: Fri, 15 Sep 2023 06:44:43 -0400
Subject: [PATCH 03/17] Rename, reorganize, and comment SpriteList lazy=True
 tests for clarity

---
 tests/unit/spritelist/test_spritelist_lazy.py | 19 ++++++++++++++++---
 1 file changed, 16 insertions(+), 3 deletions(-)

diff --git a/tests/unit/spritelist/test_spritelist_lazy.py b/tests/unit/spritelist/test_spritelist_lazy.py
index ecfbc3fce..772c4dc37 100644
--- a/tests/unit/spritelist/test_spritelist_lazy.py
+++ b/tests/unit/spritelist/test_spritelist_lazy.py
@@ -3,11 +3,16 @@
 from arcade import TextureAtlas
 
 
-def test_create():
+def test_create_lazy_equals_true():
     """Test lazy creation of spritelist"""
     spritelist = arcade.SpriteList(lazy=True, use_spatial_hash=True)
+
+    # Make sure OpenGL abstractions are not created
     assert spritelist._sprite_pos_buf == None
     assert spritelist._geometry == None
+    assert spritelist.atlas is None
+
+    # Make sure CPU-only behavior still works correctly
     for x in range(100):
         spritelist.append(
             arcade.Sprite(":resources:images/items/coinGold.png", center_x=x * 64)
@@ -15,22 +20,30 @@ def test_create():
     assert len(spritelist) == 100
     assert spritelist.spatial_hash is not None
     assert spritelist._initialized is False
-    assert spritelist.atlas is None
 
+    # Verify that initialization will fail without a window
     arcade.set_window(None)
     with pytest.raises(RuntimeError):
         spritelist.initialize()
 
 
-def test_create_2(window):
+def test_manual_initialization_after_lazy_equals_true(window):
+    """Test manual initialization of lazy sprite lists."""
     spritelist = arcade.SpriteList(lazy=True)
+
+    # CPU-only actions which shouldn't affect initializing OpenGL resources
     sprite = arcade.SpriteSolidColor(10, 10, color=(255, 255, 255, 255))
     spritelist.append(sprite)
     spritelist.remove(sprite)
 
+    # Make sure initialization still worked correctly.
     spritelist.initialize()  
     assert spritelist._initialized
     assert spritelist._sprite_pos_buf
     assert spritelist._geometry
     assert isinstance(spritelist.atlas, TextureAtlas)
+
+    # Uncomment the next line and set a breakpoint on it to
+    # spot-check the number of sprites drawn (it should be zero).
     spritelist.draw()
+    # pass
\ No newline at end of file

From 213b729b0d5b9437a3e655335610a427a874f838 Mon Sep 17 00:00:00 2001
From: pushfoo <36696816+pushfoo@users.noreply.github.com>
Date: Fri, 15 Sep 2023 06:53:39 -0400
Subject: [PATCH 04/17] Update lazy argument docstring with link to programming
 guide

---
 arcade/sprite_list/sprite_list.py | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/arcade/sprite_list/sprite_list.py b/arcade/sprite_list/sprite_list.py
index 3777bd96b..f7e2cfb60 100644
--- a/arcade/sprite_list/sprite_list.py
+++ b/arcade/sprite_list/sprite_list.py
@@ -86,11 +86,15 @@ class SpriteList(Generic[SpriteType]):
     :param capacity: (Advanced) The initial capacity of the internal buffer.
             It's a suggestion for the maximum amount of sprites this list
             can hold. Can normally be left with default value.
-    :param lazy: (Advanced) Enabling lazy spritelists ensures no internal OpenGL
-                      resources are created until the first draw call or ``initialize()``
-                      is called. This can be useful when making spritelists in threads
-                      because only the main thread is allowed to interact with
-                      OpenGL.
+    :param lazy: (Advanced) Delay creating OpenGL resources for the sprite list
+        until its first call of either of these methods:
+
+        1. py:meth:`~SpriteList.draw`
+        2. :py:meth:`~SpriteList.initialize`
+
+        This is useful for advanced techniques like parallel loading or world
+        generation. See :ref:`pg_spritelist_advanced_lazy_spritelists` to learn
+        more.
     :param visible: Setting this to False will cause the SpriteList to not
             be drawn. When draw is called, the method will just return without drawing.
     """

From f3fed5180aa719276790f886f9f6f205e2fb80c6 Mon Sep 17 00:00:00 2001
From: pushfoo <36696816+pushfoo@users.noreply.github.com>
Date: Fri, 15 Sep 2023 08:11:57 -0400
Subject: [PATCH 05/17] Link Lazy Spritelist from the lazy param docstring

---
 arcade/sprite_list/sprite_list.py | 13 ++++---------
 1 file changed, 4 insertions(+), 9 deletions(-)

diff --git a/arcade/sprite_list/sprite_list.py b/arcade/sprite_list/sprite_list.py
index f7e2cfb60..83f4d1a48 100644
--- a/arcade/sprite_list/sprite_list.py
+++ b/arcade/sprite_list/sprite_list.py
@@ -86,15 +86,10 @@ class SpriteList(Generic[SpriteType]):
     :param capacity: (Advanced) The initial capacity of the internal buffer.
             It's a suggestion for the maximum amount of sprites this list
             can hold. Can normally be left with default value.
-    :param lazy: (Advanced) Delay creating OpenGL resources for the sprite list
-        until its first call of either of these methods:
-
-        1. py:meth:`~SpriteList.draw`
-        2. :py:meth:`~SpriteList.initialize`
-
-        This is useful for advanced techniques like parallel loading or world
-        generation. See :ref:`pg_spritelist_advanced_lazy_spritelists` to learn
-        more.
+    :param lazy: (Advanced) ``True`` delays creating OpenGL resources
+            for the sprite list until either its :py:meth:`~SpriteList.draw`
+            or :py:meth:`~SpriteList.initialize` method is called. See
+            :ref:`pg_spritelist_advanced_lazy_spritelists` to learn more.
     :param visible: Setting this to False will cause the SpriteList to not
             be drawn. When draw is called, the method will just return without drawing.
     """

From 79813913edc3cbb3d3674f2f2b5be8f32b4c1883 Mon Sep 17 00:00:00 2001
From: pushfoo <36696816+pushfoo@users.noreply.github.com>
Date: Fri, 15 Sep 2023 08:53:36 -0400
Subject: [PATCH 06/17] Rewrite SpriteList.initialize docstring

* Remove unecessary details

* Link draw method

* Link lazy sprite list section of the programming guide
---
 arcade/sprite_list/sprite_list.py | 19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)

diff --git a/arcade/sprite_list/sprite_list.py b/arcade/sprite_list/sprite_list.py
index 83f4d1a48..024427775 100644
--- a/arcade/sprite_list/sprite_list.py
+++ b/arcade/sprite_list/sprite_list.py
@@ -944,14 +944,17 @@ def _write_sprite_buffers_to_gpu(self):
 
     def initialize(self):
         """
-        Create the internal OpenGL resources.
-        This can be done if the sprite list is lazy or was created before the window / context.
-        The initialization will happen on the first draw if this method is not called.
-        This is acceptable for most people, but this method gives you the ability to pre-initialize
-        to potentially void initial stalls during rendering.
-
-        Calling this otherwise will have no effect. Calling this method in another thread
-        will result in an OpenGL error.
+        Request immediate creation of OpenGL resources for this list.
+
+        Calling this method is optional. It only has an effect for lists
+        created with ``lazy=True``. If this method is not called,
+        uninitialized sprite lists will automatically initialize OpenGL
+        resources on their first :py:meth:`~SpriteList.draw` call instead.
+
+        This method is useful for performance optimization, advanced
+        techniques, and writing tests. Do not call it across thread
+        boundaries. See :ref:`pg_spritelist_advanced_lazy_spritelists`
+        to learn more.
         """
         self._init_deferred()
 

From e632e0ebff104c18a53469759640916e58519a22 Mon Sep 17 00:00:00 2001
From: pushfoo <36696816+pushfoo@users.noreply.github.com>
Date: Fri, 15 Sep 2023 08:55:08 -0400
Subject: [PATCH 07/17] Add None type annotation on SpriteList.initialize

---
 arcade/sprite_list/sprite_list.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arcade/sprite_list/sprite_list.py b/arcade/sprite_list/sprite_list.py
index 024427775..d1e0593ff 100644
--- a/arcade/sprite_list/sprite_list.py
+++ b/arcade/sprite_list/sprite_list.py
@@ -942,7 +942,7 @@ def _write_sprite_buffers_to_gpu(self):
             self._sprite_index_buf.write(self._sprite_index_data)
             self._sprite_index_changed = False
 
-    def initialize(self):
+    def initialize(self) -> None:
         """
         Request immediate creation of OpenGL resources for this list.
 

From 6e122a15b496943589405a7cda64e8744c0d92ab Mon Sep 17 00:00:00 2001
From: pushfoo <36696816+pushfoo@users.noreply.github.com>
Date: Fri, 15 Sep 2023 09:00:59 -0400
Subject: [PATCH 08/17] Update SpriteList.draw docstring with lazy info

* Add brief overview of when there may be a performance hit

* Link the lazy sprite list section
---
 arcade/sprite_list/sprite_list.py | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/arcade/sprite_list/sprite_list.py b/arcade/sprite_list/sprite_list.py
index d1e0593ff..0c2b446ca 100644
--- a/arcade/sprite_list/sprite_list.py
+++ b/arcade/sprite_list/sprite_list.py
@@ -968,6 +968,16 @@ def draw(
         """
         Draw this list of sprites.
 
+        Uninitialized sprite lists will first create OpenGL resources
+        before drawing. This may cause a performance stutter when the
+        following are true:
+
+        1. You created the sprite list with ``lazy=True``
+        2. You did not call :py:meth:`~SpriteList.initialize` before drawing
+        3. You are initializing many sprites and/or lists at once
+
+        See :ref:`pg_spritelist_advanced_lazy_spritelists` to learn more.
+
         :param filter: Optional parameter to set OpenGL filter, such as
                        `gl.GL_NEAREST` to avoid smoothing.
         :param pixelated: ``True`` for pixelated and ``False`` for smooth interpolation.

From c4ba171b45972f43cb01f84631a470c2b69795cc Mon Sep 17 00:00:00 2001
From: pushfoo <36696816+pushfoo@users.noreply.github.com>
Date: Fri, 15 Sep 2023 09:13:26 -0400
Subject: [PATCH 09/17] Fix None type issue in perf graph

---
 arcade/perf_graph.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/arcade/perf_graph.py b/arcade/perf_graph.py
index 440ac5c01..2d3300cfb 100644
--- a/arcade/perf_graph.py
+++ b/arcade/perf_graph.py
@@ -224,10 +224,13 @@ def update_graph(self, delta_time: float):
             return
 
         sprite_list = self.sprite_lists[0]
+        atlas = sprite_list.atlas
 
         # Clear and return if timings are disabled
         if not arcade.timings_enabled():
-            with sprite_list.atlas.render_into(self.minimap_texture, projection=self.proj) as fbo:
+            # Please forgive the ugly spacing. It makes type checking work.
+            with atlas.render_into( # type: ignore
+                    self.minimap_texture, projection=self.proj) as fbo:
                 fbo.clear(color=(0, 0, 0, 255))
             return
 

From 9830d772053ce804723eb4babe5fea1434024092 Mon Sep 17 00:00:00 2001
From: pushfoo <36696816+pushfoo@users.noreply.github.com>
Date: Fri, 15 Sep 2023 09:14:08 -0400
Subject: [PATCH 10/17] Fix a None type issue in SpriteList.append

---
 arcade/sprite_list/sprite_list.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arcade/sprite_list/sprite_list.py b/arcade/sprite_list/sprite_list.py
index 0c2b446ca..34d3779e9 100644
--- a/arcade/sprite_list/sprite_list.py
+++ b/arcade/sprite_list/sprite_list.py
@@ -621,7 +621,7 @@ def append(self, sprite: SpriteType):
         if self._initialized:
             if sprite.texture is None:
                 raise ValueError("Sprite must have a texture when added to a SpriteList")
-            self._atlas.add(sprite.texture)
+            self._atlas.add(sprite.texture)  # type: ignore
 
     def swap(self, index_1: int, index_2: int):
         """

From 619fd6846a1608609991b26da09ad9141e267139 Mon Sep 17 00:00:00 2001
From: pushfoo <36696816+pushfoo@users.noreply.github.com>
Date: Fri, 15 Sep 2023 09:15:39 -0400
Subject: [PATCH 11/17] Fix a second None type issue in perf graph

---
 arcade/perf_graph.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arcade/perf_graph.py b/arcade/perf_graph.py
index 2d3300cfb..2d8b10a70 100644
--- a/arcade/perf_graph.py
+++ b/arcade/perf_graph.py
@@ -287,7 +287,9 @@ def update_graph(self, delta_time: float):
                 text_object.text = f"{int(index * view_y_legend_increment)}"
 
         # Render to the internal texture
-        with sprite_list.atlas.render_into(self.minimap_texture, projection=self.proj) as fbo:
+        # This ugly spacing is intentional to make type checking work.
+        with atlas.render_into( # type: ignore
+                self.minimap_texture, projection=self.proj) as fbo:
 
             # Set the background color
             fbo.clear(self.background_color)

From 2554a5d8a5d30c476fc4e4ec89a0c64315e2deca Mon Sep 17 00:00:00 2001
From: pushfoo <36696816+pushfoo@users.noreply.github.com>
Date: Fri, 15 Sep 2023 09:18:04 -0400
Subject: [PATCH 12/17] Fix a None type issue in preload_textures

---
 arcade/sprite_list/sprite_list.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arcade/sprite_list/sprite_list.py b/arcade/sprite_list/sprite_list.py
index 34d3779e9..4a31e277c 100644
--- a/arcade/sprite_list/sprite_list.py
+++ b/arcade/sprite_list/sprite_list.py
@@ -880,7 +880,9 @@ def preload_textures(self, texture_list: List["Texture"]) -> None:
             raise ValueError("Cannot preload textures before the window is created")
 
         for texture in texture_list:
-            self._atlas.add(texture)
+            # Ugly spacing is a fast workaround for None type checking issues
+            self._atlas.add( # type: ignore
+                texture)
 
 
     def write_sprite_buffers_to_gpu(self) -> None:

From a17224990a45b757b81cf38d657cc160135a998c Mon Sep 17 00:00:00 2001
From: pushfoo <36696816+pushfoo@users.noreply.github.com>
Date: Fri, 15 Sep 2023 09:23:15 -0400
Subject: [PATCH 13/17] Fix 4 None errors in SpriteList.draw

---
 arcade/sprite_list/sprite_list.py | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/arcade/sprite_list/sprite_list.py b/arcade/sprite_list/sprite_list.py
index 4a31e277c..a36de1d4b 100644
--- a/arcade/sprite_list/sprite_list.py
+++ b/arcade/sprite_list/sprite_list.py
@@ -1000,22 +1000,25 @@ def draw(
         else:
             self.ctx.blend_func = self.ctx.BLEND_DEFAULT
 
+        # Workaround for Optional[TextureAtlas] + slow . lookup speed
+        atlas_texture: Texture2D = self.atlas.texture  # type: ignore
+
         # Set custom filter or reset to default
         if filter:
             if hasattr(filter, '__len__', ): # assume it's a collection
                 if len(cast(Sized, filter)) != 2:
                     raise ValueError("Can't use sequence of length != 2")
-                self.atlas.texture.filter = tuple(filter)  # type: ignore
+                atlas_texture.filter = tuple(filter)  # type: ignore
             else:  # assume it's an int
-                self.atlas.texture.filter = cast(OpenGlFilter, (filter, filter))
+                atlas_texture.filter = cast(OpenGlFilter, (filter, filter))
         else:
-            self.atlas.texture.filter = self.ctx.LINEAR, self.ctx.LINEAR
+            atlas_texture.filter = self.ctx.LINEAR, self.ctx.LINEAR
 
         # Handle the pixelated shortcut
         if pixelated:
-            self.atlas.texture.filter = self.ctx.NEAREST, self.ctx.NEAREST
+            atlas_texture.filter = self.ctx.NEAREST, self.ctx.NEAREST
         else:
-            self.atlas.texture.filter = self.ctx.LINEAR, self.ctx.LINEAR
+            atlas_texture.filter = self.ctx.LINEAR, self.ctx.LINEAR
 
         if not self.program:
             raise ValueError("Attempting to render without 'program' field being set.")

From 28a883762680a2d992c7e47ba041e95e90edee97 Mon Sep 17 00:00:00 2001
From: pushfoo <36696816+pushfoo@users.noreply.github.com>
Date: Fri, 15 Sep 2023 09:26:01 -0400
Subject: [PATCH 14/17] Extend workaround / speed tweak to the rest of
 SpriteList.draw

---
 arcade/sprite_list/sprite_list.py | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/arcade/sprite_list/sprite_list.py b/arcade/sprite_list/sprite_list.py
index a36de1d4b..6ec6b641d 100644
--- a/arcade/sprite_list/sprite_list.py
+++ b/arcade/sprite_list/sprite_list.py
@@ -33,6 +33,7 @@
     get_window,
     gl,
 )
+from arcade.gl import Texture2D
 from arcade.types import Color, RGBA255
 from arcade.gl.types import OpenGlFilter, BlendFunction, PyGLenum
 from arcade.gl.buffer import Buffer
@@ -1000,8 +1001,9 @@ def draw(
         else:
             self.ctx.blend_func = self.ctx.BLEND_DEFAULT
 
-        # Workaround for Optional[TextureAtlas] + slow . lookup speed
-        atlas_texture: Texture2D = self.atlas.texture  # type: ignore
+        # Workarounds for Optional[TextureAtlas] + slow . lookup speed
+        atlas: TextureAtlas = self.atlas # type: ignore
+        atlas_texture: Texture2D = atlas.texture
 
         # Set custom filter or reset to default
         if filter:
@@ -1025,8 +1027,8 @@ def draw(
 
         self.program["spritelist_color"] = self._color
 
-        self._atlas.texture.use(0)
-        self._atlas.use_uv_texture(1)
+        atlas_texture.use(0)
+        atlas.use_uv_texture(1)
         if not self._geometry:
             raise ValueError("Attempting to render without '_geometry' field being set.")
         self._geometry.render(

From 3499fd768e677192d219e535c3a4f3a0143902ad Mon Sep 17 00:00:00 2001
From: pushfoo <36696816+pushfoo@users.noreply.github.com>
Date: Fri, 15 Sep 2023 09:29:15 -0400
Subject: [PATCH 15/17] Add None typing workaround to _update_texture

---
 arcade/sprite_list/sprite_list.py | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/arcade/sprite_list/sprite_list.py b/arcade/sprite_list/sprite_list.py
index 6ec6b641d..f3b8fa481 100644
--- a/arcade/sprite_list/sprite_list.py
+++ b/arcade/sprite_list/sprite_list.py
@@ -1176,8 +1176,10 @@ def _update_texture(self, sprite) -> None:
 
         if not sprite._texture:
             return
-
-        tex_slot, _ = self._atlas.add(sprite._texture)
+        atlas = self._atlas
+        # Ugly spacing makes type checking work with specificity
+        tex_slot: int = atlas.add( # type: ignore
+            sprite._texture)[0]
         slot = self.sprite_slot[sprite]
 
         self._sprite_texture_data[slot] = tex_slot

From 936d2c0fb59e5f9328e72188348a09d4ffb597aa Mon Sep 17 00:00:00 2001
From: pushfoo <36696816+pushfoo@users.noreply.github.com>
Date: Fri, 15 Sep 2023 09:31:40 -0400
Subject: [PATCH 16/17] Add typing fix in SpriteList._update_all

---
 arcade/sprite_list/sprite_list.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arcade/sprite_list/sprite_list.py b/arcade/sprite_list/sprite_list.py
index f3b8fa481..903927166 100644
--- a/arcade/sprite_list/sprite_list.py
+++ b/arcade/sprite_list/sprite_list.py
@@ -1160,7 +1160,9 @@ def _update_all(self, sprite: SpriteType):
         if not sprite._texture:
             return
 
-        tex_slot, _ = self._atlas.add(sprite._texture)
+        # Ugly syntax makes type checking pass without perf hit from cast
+        tex_slot: int = self._atlas.add( # type: ignore
+            sprite._texture)[0]
         slot = self.sprite_slot[sprite]
 
         self._sprite_texture_data[slot] = tex_slot

From e69b51c5f9b95e10b543fc9f45832f2c884eb784 Mon Sep 17 00:00:00 2001
From: pushfoo <36696816+pushfoo@users.noreply.github.com>
Date: Fri, 15 Sep 2023 10:52:38 -0400
Subject: [PATCH 17/17] Add missing newline at end of file

---
 tests/unit/spritelist/test_spritelist_lazy.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tests/unit/spritelist/test_spritelist_lazy.py b/tests/unit/spritelist/test_spritelist_lazy.py
index 772c4dc37..c7b46959a 100644
--- a/tests/unit/spritelist/test_spritelist_lazy.py
+++ b/tests/unit/spritelist/test_spritelist_lazy.py
@@ -46,4 +46,4 @@ def test_manual_initialization_after_lazy_equals_true(window):
     # Uncomment the next line and set a breakpoint on it to
     # spot-check the number of sprites drawn (it should be zero).
     spritelist.draw()
-    # pass
\ No newline at end of file
+    # pass