406cc7c0c7
Add S-expression based video effects pipeline with modular effect definitions, constructs, and recipe files. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
32 lines
895 B
Common Lisp
32 lines
895 B
Common Lisp
;; Mirror effect - mirrors half of image
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;; @param mode string default "left_right"
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(define-effect mirror
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((mode "left_right"))
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(let* ((w (width frame))
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(h (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 (crop frame 0 0 hw h))
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(result (copy frame)))
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(paste result (flip-h left) hw 0)))
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((= mode "right_left")
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(let ((right (crop frame hw 0 hw h))
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(result (copy frame)))
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(paste result (flip-h right) 0 0)))
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((= mode "top_bottom")
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(let ((top (crop frame 0 0 w hh))
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(result (copy frame)))
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(paste result (flip-v top) 0 hh)))
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((= mode "bottom_top")
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(let ((bottom (crop frame 0 hh w hh))
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(result (copy frame)))
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(paste result (flip-v bottom) 0 0)))
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(else frame))))
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