factor/library/sdl/sdl-utils.factor

46 lines
1.1 KiB
Factor

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