43 lines
1.1 KiB
Factor
43 lines
1.1 KiB
Factor
! Copyright (C) 2008 Doug Coleman, Joe Groff.
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! See http://factorcode.org/license.txt for BSD license.
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USING: accessors byte-arrays images images.normalization
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images.viewer kernel math namespaces opengl opengl.gl sequences
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ui ui.backend ui.gadgets.worlds ;
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IN: cap
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<PRIVATE
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: screenshot-array ( world -- byte-array )
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dim>> [ first 4 * ] [ second ] bi
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[ gl-scale ] bi@ * >fixnum <byte-array> ;
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: gl-screenshot ( gadget -- byte-array )
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[ find-gl-context ]
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[
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[
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GL_BACK glReadBuffer
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GL_PACK_ALIGNMENT 4 glPixelStorei
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0 0
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] dip
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dim>> first2 [ gl-scale >fixnum ] bi@
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GL_RGBA GL_UNSIGNED_BYTE
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]
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[ screenshot-array ] tri
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[ glReadPixels ] keep ;
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PRIVATE>
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: screenshot ( window -- bitmap )
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[ <image>
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gl-scale-factor get-global [ 2.0 = >>2x? ] when*
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] dip
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[ gl-screenshot >>bitmap ]
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[ dim>> [ gl-scale >fixnum ] map >>dim ] bi
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ubyte-components >>component-type
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RGBA >>component-order
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t >>upside-down?
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normalize-image ;
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: screenshot. ( window -- )
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[ screenshot <image-gadget> ] [ title>> ] bi open-window ;
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