107 lines
3.1 KiB
Scheme
107 lines
3.1 KiB
Scheme
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; test PDB methods that change selection from existing selection
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; setup
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; Reusing image 10
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(define testImage 10)
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; Test a selection-changing function
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; starting from selection None.
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;
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; The testFunction takes a "step" arg
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; and does not change the selection bounds.
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; {none <func> is-empty} yields true
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; {none <func>} is not an error
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(define (test-selection-change-from-none testFunction testImage)
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; Starting state: selection none
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(assert `(pika-selection-none ,testImage))
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; test the testFunction
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(assert `(,testFunction
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,testImage
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4 )) ; radius or step
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; expect selection is still empty
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(assert `(= (car (pika-selection-is-empty ,testImage))
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1))
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; expect since there is no selection, the bounds are the entire image
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(assert `(equal? (cdr (pika-selection-bounds ,testImage))
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'(0 0 21 22)))
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)
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(define (test-selection-change-from-all testFunction testImage isIdempotent)
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; Starting state: selection all
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(assert `(pika-selection-all ,testImage))
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; test the testFunction
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(assert `(,testFunction
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,testImage
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4 )) ; radius or step
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(if isIdempotent
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(begin
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; expect selection is still not empty
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(assert `(= (car (pika-selection-is-empty ,testImage))
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0))
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; expect selection bounds are still entire image
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(assert `(equal? (cdr (pika-selection-bounds ,testImage))
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'(0 0 21 22)))))
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)
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; test selection methods that change by a pixel amount
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(test-selection-change-from-none pika-selection-feather testImage)
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(test-selection-change-from-none pika-selection-grow testImage)
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(test-selection-change-from-none pika-selection-shrink testImage)
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(test-selection-change-from-none pika-selection-border testImage)
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; feather and grow from all are idempotent
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(test-selection-change-from-all pika-selection-feather testImage #t)
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(test-selection-change-from-all pika-selection-grow testImage #t)
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(test-selection-change-from-all pika-selection-shrink testImage #f)
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; shrink from all changes bounds
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(assert `(equal? (cdr (pika-selection-bounds ,testImage))
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'(4 4 17 18)))
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(test-selection-change-from-all pika-selection-border testImage #f)
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; border from all empties the selection
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(assert `(= (car (pika-selection-is-empty ,testImage))
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1))
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; Effectiveness
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; When starting from a typical selection (not empty, not all)
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; TODO feather effective?
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; Might feather change bounds?
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; grow is effective
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; bounds are larger
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; TODO
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(assert `(equal? (cdr (pika-selection-bounds ,testImage))
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'(0 0 21 22)))
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; TODO test flood effective: holes were filled
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; Can't do it without knowing how many pixels are selected?
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; Knowing bounds is not adequate.
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; Simple tests of success
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(assert `(pika-selection-flood ,testImage))
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(assert `(pika-selection-invert ,testImage))
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(assert `(pika-selection-sharpen ,testImage))
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(assert `(pika-selection-translate
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,testImage
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4 4))
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; TODO invert none is all and vice versa
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; TODO translate effective
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; TODO translate by large offset is empty selection
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; TODO sharpen is effective at removing antialiasing
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; save creates a new channel
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