66 lines
1.8 KiB
Factor
66 lines
1.8 KiB
Factor
USING: accessors alien.c-types alien.data combinators grouping
|
|
kernel locals math math.vectors opengl.gl sequences
|
|
specialized-arrays ui.gadgets ui.render ;
|
|
SPECIALIZED-ARRAY: uint
|
|
IN: frame-buffer
|
|
|
|
TUPLE: frame-buffer < gadget pixels last-dim ;
|
|
|
|
: <frame-buffer> ( -- frame-buffer ) frame-buffer new ;
|
|
|
|
GENERIC: update-frame-buffer ( frame-buffer -- )
|
|
|
|
: init-frame-buffer-pixels ( frame-buffer -- )
|
|
dup dim>> product 4 * uint <c-array> >>pixels
|
|
drop ;
|
|
|
|
:: draw-pixels ( FRAME-BUFFER -- )
|
|
FRAME-BUFFER dim>> first2
|
|
GL_RGBA
|
|
GL_UNSIGNED_INT
|
|
FRAME-BUFFER pixels>>
|
|
glDrawPixels ;
|
|
|
|
:: read-pixels ( FRAME-BUFFER -- )
|
|
0
|
|
0
|
|
FRAME-BUFFER dim>> first2
|
|
GL_RGBA
|
|
GL_UNSIGNED_INT
|
|
FRAME-BUFFER pixels>>
|
|
glReadPixels ;
|
|
|
|
:: copy-row ( OLD NEW -- )
|
|
OLD NEW min-length :> LEN
|
|
OLD LEN head-slice 0 NEW copy ;
|
|
|
|
: copy-pixels ( old-pixels old-width new-pixels new-width -- )
|
|
[ [ drop { } ] [ 16 * <groups> ] if-zero ] 2bi@
|
|
[ copy-row ] 2each ;
|
|
|
|
: update-last-dim ( frame-buffer -- ) dup dim>> >>last-dim drop ;
|
|
|
|
M:: frame-buffer layout* ( FRAME-BUFFER -- )
|
|
FRAME-BUFFER last-dim>> [
|
|
FRAME-BUFFER dim>> = [
|
|
FRAME-BUFFER pixels>> :> OLD-PIXELS
|
|
FRAME-BUFFER last-dim>> first :> OLD-WIDTH
|
|
FRAME-BUFFER init-frame-buffer-pixels
|
|
FRAME-BUFFER update-last-dim
|
|
FRAME-BUFFER pixels>> :> NEW-PIXELS
|
|
FRAME-BUFFER last-dim>> first :> NEW-WIDTH
|
|
OLD-PIXELS OLD-WIDTH NEW-PIXELS NEW-WIDTH copy-pixels
|
|
] unless
|
|
] [
|
|
FRAME-BUFFER init-frame-buffer-pixels
|
|
FRAME-BUFFER update-last-dim
|
|
] if* ;
|
|
|
|
M:: frame-buffer draw-gadget* ( FRAME-BUFFER -- )
|
|
FRAME-BUFFER dim>> { 0 1 } v* first2 glRasterPos2i
|
|
FRAME-BUFFER draw-pixels
|
|
FRAME-BUFFER update-frame-buffer
|
|
glFlush
|
|
FRAME-BUFFER read-pixels ;
|
|
|