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fix problem with PNGs that have no background color

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This commit is contained in:
Matthew Flatt 2010-08-01 07:17:06 -06:00
parent af4ccd2de1
commit b9eb058cec
1 changed files with 1 additions and 1 deletions
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2
collects/racket/draw/png.rkt
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@ -131,7 +131,7 @@
(define-png png_write_end (_fun _png_structp _png_infop -> _void))
(define-png png_get_valid (_fun _png_structp _png_infop _uint32 -> _uint32))
(define-png png_get_bKGD (_fun _png_structp _png_infop (p : (_ptr o _png_color_16-pointer)) -> (r : _bool) -> (and r p)))
(define-png png_get_bKGD (_fun _png_structp _png_infop (p : (_ptr o _png_color_16-pointer/null)) -> (r : _bool) -> (and r p)))
(define-png png_set_background (_fun _png_structp _png_color_16-pointer _int _int _double* -> _bool))
(define-png png_get_gAMA (_fun _png_structp _png_infop (g : (_ptr o _double))
-> (ok? : _bool)