34 lines
1.0 KiB
Common Lisp
34 lines
1.0 KiB
Common Lisp
;; Mirror effect - mirrors half of image
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(require-primitives "geometry" "image")
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(define-effect mirror
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:params (
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(mode :type string :default "left_right")
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)
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(let* ((w (image:width frame))
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(h (image:height frame))
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(hw (floor (/ w 2)))
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(hh (floor (/ h 2))))
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(cond
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((= mode "left_right")
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(let ((left (image:crop frame 0 0 hw h))
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(result (copy frame)))
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(paste result (geometry:flip-img left "horizontal") hw 0)))
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((= mode "right_left")
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(let ((right (image:crop frame hw 0 hw h))
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(result (copy frame)))
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(paste result (geometry:flip-img right "horizontal") 0 0)))
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((= mode "top_bottom")
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(let ((top (image:crop frame 0 0 w hh))
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(result (copy frame)))
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(paste result (geometry:flip-img top "vertical") 0 hh)))
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((= mode "bottom_top")
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(let ((bottom (image:crop frame 0 hh w hh))
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(result (copy frame)))
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(paste result (geometry:flip-img bottom "vertical") 0 0)))
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(else frame))))
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