112 lines
2.7 KiB
Factor
112 lines
2.7 KiB
Factor
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USING: accessors alien.c-types combinators grouping kernel
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locals math math.geometry.rect math.vectors opengl.gl sequences
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ui.gadgets ui.render ;
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IN: frame-buffer
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! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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TUPLE: <frame-buffer> < gadget pixels last-dim ;
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! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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GENERIC: update-frame-buffer ( <frame-buffer> -- )
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! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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: init-frame-buffer-pixels ( frame-buffer -- )
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dup
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rect-dim product "uint[4]" <c-array>
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>>pixels
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drop ;
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! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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: frame-buffer ( -- <frame-buffer> ) <frame-buffer> new-gadget ;
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! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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:: draw-pixels ( FRAME-BUFFER -- )
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FRAME-BUFFER rect-dim first2
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GL_RGBA
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GL_UNSIGNED_INT
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FRAME-BUFFER pixels>>
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glDrawPixels ;
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! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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:: read-pixels ( FRAME-BUFFER -- )
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0
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0
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FRAME-BUFFER rect-dim first2
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GL_RGBA
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GL_UNSIGNED_INT
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FRAME-BUFFER pixels>>
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glReadPixels ;
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! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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:: copy-row ( OLD NEW -- )
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[let | LEN [ OLD NEW min-length ] |
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OLD LEN head-slice 0 NEW copy ] ;
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: copy-pixels ( old-pixels old-width new-pixels new-width -- )
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[ 16 * <groups> ] 2bi@ [ copy-row ] 2each ;
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! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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: update-last-dim ( frame-buffer -- ) dup rect-dim >>last-dim drop ;
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M:: <frame-buffer> layout* ( FRAME-BUFFER -- )
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{
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{
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[ FRAME-BUFFER last-dim>> f = ]
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[
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FRAME-BUFFER init-frame-buffer-pixels
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FRAME-BUFFER update-last-dim
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]
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}
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{
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[ FRAME-BUFFER [ rect-dim ] [ last-dim>> ] bi = not ]
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[
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[let | OLD-PIXELS [ FRAME-BUFFER pixels>> ]
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OLD-WIDTH [ FRAME-BUFFER last-dim>> first ] |
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FRAME-BUFFER init-frame-buffer-pixels
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FRAME-BUFFER update-last-dim
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[let | NEW-PIXELS [ FRAME-BUFFER pixels>> ]
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NEW-WIDTH [ FRAME-BUFFER last-dim>> first ] |
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OLD-PIXELS OLD-WIDTH NEW-PIXELS NEW-WIDTH copy-pixels ] ]
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]
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}
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{ [ t ] [ ] }
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}
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cond ;
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! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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M:: <frame-buffer> draw-gadget* ( FRAME-BUFFER -- )
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FRAME-BUFFER rect-dim { 0 1 } v* first2 glRasterPos2i
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FRAME-BUFFER draw-pixels
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FRAME-BUFFER update-frame-buffer
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glFlush
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FRAME-BUFFER read-pixels ;
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! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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