46 lines
1.1 KiB
Factor
46 lines
1.1 KiB
Factor
! Copyright (C) 2004, 2005 Slava Pestov.
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! See http://factor.sf.net/license.txt for BSD license.
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IN: sdl
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USING: kernel lists math namespaces ;
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: rgb ( [ r g b ] -- n )
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3unlist
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255
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swap 8 shift bitor
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swap 16 shift bitor
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swap 24 shift bitor ;
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: make-color ( r g b -- color )
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#! Make an SDL_Color struct. This will go away soon in favor
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#! of pass-by-value support in the FFI.
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255 24 shift
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swap 16 shift bitor
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swap 8 shift bitor
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swap bitor ;
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: black [ 0 0 0 ] ;
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: gray [ 128 128 128 ] ;
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: white [ 255 255 255 ] ;
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: red [ 255 0 0 ] ;
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: green [ 0 255 0 ] ;
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: blue [ 0 0 255 ] ;
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: with-pixels ( quot -- )
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width get [
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height get [
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[ rot dup slip swap surface get swap ] 2keep
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[ rot pixelColor ] 2keep
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] repeat
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] repeat drop ; inline
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: with-surface ( quot -- )
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#! Execute a quotation, locking the current surface if it
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#! is required (eg, hardware surface).
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[
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surface get dup must-lock-surface? [
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dup SDL_LockSurface drop slip dup SDL_UnlockSurface
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] [
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slip
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] ifte SDL_Flip drop
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] with-scope ; inline
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