Finalized lens work. Started initial unit tests.

examples/effects/crop.py

@@ -0,0 +1,7 @@
+from displayarray.effects import crop
+from displayarray import display
+from examples.videos import test_video
+
+# Move the mouse to move where the crop is from on the original image
+
+display(test_video).add_callback(crop.Crop().enable_mouse_control()).block()

examples/effects/lens/barrel.py

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+from displayarray.effects import lens
+from displayarray import display
+from examples.videos import test_video
+
+# Move the mouse to center the image, scroll to increase/decrease barrel, ctrl+scroll to increase/decrease zoom
+
+m = lens.Barrel(use_bleed=False)
+m.enable_mouse_control()
+display(test_video, callbacks=m, blocking=True)

examples/effects/lens/moustache.py

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+from displayarray.effects import lens
+from displayarray import display
+from examples.videos import test_video
+
+m = lens.Mustache()
+m.enable_mouse_control()
+display(test_video, callbacks=m, blocking=True)

examples/effects/lens_crop.py

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+from displayarray.effects import crop, lens
+from displayarray import display
+from examples.videos import test_video
+
+# Move the mouse to center the image, scroll to increase/decrease barrel, ctrl+scroll to increase/decrease zoom
+
+d = display(test_video) \
+    .add_callback(crop.Crop()) \
+    .add_callback(lens.Barrel().enable_mouse_control()) \
+    .wait_for_init()
+
+while d:
+    print(d.frames[0].shape)

examples/effects/lens_crop_blocking.py

@@ -0,0 +1,10 @@
+from displayarray.effects import crop, lens
+from displayarray import display
+from examples.videos import test_video
+
+# Move the mouse to move where the crop is from on the original image
+
+display(test_video) \
+    .add_callback(crop.Crop()) \
+    .add_callback(lens.Barrel().enable_mouse_control()) \
+    .block()