         GDK_FUNC_MOVE enum>number bitor gdk_window_set_functions
     ] 2tri ;
 
+: setup-gl ( world -- ? )
+    [
+        [ handle>> window>> ] [ handle>> ] bi*
+        f t GDK_GL_RGBA_TYPE enum>number gtk_widget_set_gl_capability
+    ] with-world-pixel-format ;
+
 M:: gtk-ui-backend (open-window) ( world -- )
     GTK_WINDOW_TOPLEVEL gtk_window_new :> win
+    win <window-handle> world handle<<
     world [ window-loc>> win swap first2 gtk_window_move ]
     [ dim>> win swap first2 gtk_window_set_default_size ] bi
-    
-    win enable-gl drop ! сделать проверку на доступность OpenGL
-
+
+    world setup-gl drop
+    
     win connect-signals
     
     win gtk_widget_realize
     win world window-controls>> configure-window-controls
     
-    win <window-handle> world handle<<
     world win register-window
     
     win gtk_widget_show_all ;

! Copyright (C) 2010 Anton Gorenko.
! See http://factorcode.org/license.txt for BSD license.
USING: accessors alien.c-types alien.enums alien.strings arrays
ascii assocs classes.struct combinators.short-circuit
command-line destructors io.backend.unix.multiplexers
io.encodings.utf8 io.thread kernel libc literals locals math
math.bitwise namespaces sequences strings threads ui ui.backend
ui.clipboards ui.event-loop ui.gadgets ui.gadgets.private
ui.gadgets.worlds ui.gestures ui.private
glib.ffi gobject.ffi gtk.ffi gdk.ffi gdk.gl.ffi gtk.gl.ffi ;
IN: ui.backend.gtk


TUPLE: gtk-clipboard handle ;

C: <gtk-clipboard> gtk-clipboard

PIXEL-FORMAT-ATTRIBUTE-TABLE: gl-config-attribs { $[ GDK_GL_USE_GL enum>number GDK_GL_RGBA enum>number ] } H{
    { double-buffered { $[ GDK_GL_DOUBLEBUFFER enum>number ] } }
    { stereo { $[ GDK_GL_STEREO enum>number ] } }
    ! { offscreen { $[ GDK_GL_DRAWABLE_TYPE enum>number ] 2 } }
    ! { fullscreen { $[ GDK_GL_DRAWABLE_TYPE enum>number ] 1 } }
    ! { windowed { $[ GDK_GL_DRAWABLE_TYPE enum>number ] 1 } }
    { color-bits { $[ GDK_GL_BUFFER_SIZE enum>number ] } }
    { red-bits { $[ GDK_GL_RED_SIZE enum>number ] } }
    { green-bits { $[ GDK_GL_GREEN_SIZE enum>number ] } }
    { blue-bits { $[ GDK_GL_BLUE_SIZE enum>number ] } }
    { alpha-bits { $[ GDK_GL_ALPHA_SIZE enum>number ] } }
    { accum-red-bits { $[ GDK_GL_ACCUM_RED_SIZE enum>number ] } }
    { accum-green-bits { $[ GDK_GL_ACCUM_GREEN_SIZE enum>number ] } }
    { accum-blue-bits { $[ GDK_GL_ACCUM_BLUE_SIZE enum>number ] } }
    { accum-alpha-bits { $[ GDK_GL_ACCUM_ALPHA_SIZE enum>number ] } }
    { depth-bits { $[ GDK_GL_DEPTH_SIZE enum>number ] } }
    { stencil-bits { $[ GDK_GL_STENCIL_SIZE enum>number ] } }
    { aux-buffers { $[ GDK_GL_AUX_BUFFERS enum>number ] } }
    { sample-buffers { $[ GDK_GL_SAMPLE_BUFFERS enum>number ] } }
    { samples { $[ GDK_GL_SAMPLES enum>number ] } }
}

M: gtk-ui-backend (make-pixel-format)
    nip >gl-config-attribs-int-array gdk_gl_config_new ;

M: gtk-ui-backend (free-pixel-format)
    handle>> g_object_unref ;

M: gtk-ui-backend (pixel-format-attribute)
    [ handle>> ] [ >gl-config-attribs ] bi*
    { int } [ gdk_gl_config_get_attrib drop ] [ ]
    with-out-parameters ;

CONSTANT: events-mask
    {
