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diff --git a/extra/ui/render/test/test.factor b/extra/ui/render/test/test.factor
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+++ b/extra/ui/render/test/test.factor
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+! Copyright (C) 2008 Slava Pestov.
+! See http://factorcode.org/license.txt for BSD license.
+USING: accessors colors arrays kernel sequences math byte-arrays
+namespaces cap graphics.bitmap
+ui.gadgets ui.gadgets.packs ui.gadgets.borders ui.gadgets.grids
+ui.gadgets.grid-lines ui.gadgets.labels ui.gadgets.buttons
+ui.render ui opengl opengl.gl ;
+IN: ui.render.test
+
+SINGLETON: line-test
+
+M: line-test draw-interior
+    2drop { 0 0 } { 0 10 } gl-line ;
+
+: <line-gadget> ( -- gadget )
+    <gadget>
+        line-test >>interior
+        { 1 10 } >>dim ;
+
+TUPLE: ui-render-test < pack { first-time? initial: t } ;
+
+: message-window ( text -- )
+    <label> "Message" open-window ;
+
+: check-rendering ( gadget -- )
+    gl-screenshot
+    "resource:extra/ui/render/test/reference.bmp" load-bitmap array>>
+    = "perfect" "needs work" ? "Your UI rendering is " prepend
+    message-window ;
+
+M: ui-render-test draw-gadget*
+    [ call-next-method ] [
+        dup first-time?>> [
+            dup check-rendering
+            f >>first-time?
+        ] when
+        drop
+    ] bi ;
+
+: <ui-render-test> ( -- gadget )
+    \ ui-render-test new-gadget
+        { 1 0 } >>orientation
+        <gadget>
+            black <solid> >>interior
+            { 98 98 } >>dim
+        1 <border> add-gadget
+        <gadget>
+            gray <solid> >>boundary
+            { 94 94 } >>dim
+        3 <border>
+            red <solid> >>boundary
+        add-gadget
+            <line-gadget> <line-gadget> <line-gadget> 3array
+            <line-gadget> <line-gadget> <line-gadget> 3array
+            <line-gadget> <line-gadget> <line-gadget> 3array
+        3array <grid>
+            { 5 5 } >>gap
+            blue <grid-lines> >>boundary
+        add-gadget
+        <gadget>
+            { 14 14 } >>dim
+            black <checkmark-paint> >>interior
+            black <solid> >>boundary
+        4 <border>
+        add-gadget ;
+    
+: ui-render-test ( -- )
+    <ui-render-test> "Test" open-window ;
+
+MAIN: ui-render-test