Index: gl-helper.fs
==================================================================
--- gl-helper.fs
+++ gl-helper.fs
@@ -207,12 +207,13 @@
     2r> 2swap ;
 
 Variable $attrib
 
 : >bindattrib ( xt program -- )  0 { prog idx } shader>string
-    BEGIN  s" attribute " >attrib extract-name dup  WHILE  $attrib $!
-	    prog idx $attrib $@ over + 0 swap c! glBindAttribLocation
+    BEGIN  s" attribute " >attrib extract-name dup  WHILE
+	    $attrib $!  0 $attrib c$+!
+	    prog idx $attrib $@ drop glBindAttribLocation
 	    idx 1+ to idx
     REPEAT  2drop 2drop ;
 
 : >univattrib ( xt program -- )  { prog }
     shader>string
@@ -406,16 +407,19 @@
     top bottom f+ top bottom f- f/ sf!+
     near far f+ near far f- f/ sf!+ -1e sf!+
     sfloat+ sfloat+ near far f* f2* near far f- f/ sf!+ 0e sf!+
     drop ;
 
+: ap-set ( -- )
+    ap-matrix MVPMatrix set-matrix
+    ap-matrix MVMatrix set-matrix ;
+
 : >ap ( near far scale -- ) f2* 1/f { f: scale }
     scale dpy-w @ fm* fdup fnegate fswap
     scale dpy-h @ fm* fdup fnegate fswap >ortho
     \ cr ap-matrix .matrix
-    ap-matrix MVPMatrix set-matrix
-    ap-matrix MVMatrix set-matrix ;
+    ap-set ;
 : >apxy ( xoff yoff -- )  y-apos sf!  x-apos sf! ;
 
 \ textures
 
 Create white-texture \ aabbggrr
@@ -510,26 +514,10 @@
     Ambient 1 ambient% glUniform1fv
     LightPos 0.0e 0.0e -0.3e glUniform3f
     z-bias set-color+
     .01e 100e dpy-w @ dpy-h @ min s>f f2/ 100 fm* >ap ;
 
-: 2d-vertex ( index addr -- ) >r
-    dup 2 GL_FLOAT  0 0 r> glVertexAttribPointer
-    glEnableVertexAttribArray ;
-
-: 3d-vertex ( index addr -- ) >r
-    dup 3 GL_FLOAT  0 0 r> glVertexAttribPointer
-    glEnableVertexAttribArray ;
-
-: 4d-vertex ( index addr -- ) >r
-    dup 4 GL_FLOAT  0 0 r> glVertexAttribPointer
-    glEnableVertexAttribArray ;
-
-: rgba-vertex ( index addr -- ) >r
-    dup 4 GL_UNSIGNED_BYTE GL_TRUE 0 r> glVertexAttribPointer
-    glEnableVertexAttribArray ;
-
 \ glDrawElements helper
 
 $8 cells buffer: gl-buffers
 : buf@ ( n -- buf ) cells gl-buffers + @ ;
 : bind-buf ( type n -- ) buf@ glBindBuffer ;

Index: gl-sample.fs
==================================================================
--- gl-sample.fs
+++ gl-sample.fs
@@ -1,10 +1,10 @@
 \ opengl example
 
 require gl-helper.fs
 
-also opengl
+also opengl also [IFDEF] android android [THEN]
 
 tex: ascii-tex
 
 : load-textures ( -- )
     ascii-tex s" ascii.png" load-texture wrap mipmap ;
@@ -37,21 +37,10 @@
 
 : normals >v
     3 0 DO  0e 0e -1e n>xyz v+  LOOP  o> ;
 
 Variable new-config
-
-[IFDEF] android
-also android
-
-:noname  defers window-init
-    ['] VertexShader ['] FragmentShader create-program to program
-    program init load-textures ; IS window-init
-
-:noname new-config on ; is config-changed
-[THEN]
-
 FVariable touch -100e touch f!
 FVariable motion 0.01e motion f!
 
 : draw-tri-angle ( f -- )
     0.01e 0.02e 0.15e 1.0e glClearColor
@@ -66,13 +55,10 @@
     ascii-tex
     GL_TRIANGLES draw-elements
     sync ;
 
 : draw-tri { f: angle -- angle' }
-    new-config @ IF
-	dpy-w @ dpy-h @ getwh dpy-w @ dpy-h @ d<> IF  new-config off  THEN
-    THEN
     angle draw-tri-angle
     >looper
     *input >r r@ IF
 	r@ action @ abs 1 <> IF
 	    \ ." Touch at " r@ x0 ? r@ y0 ? cr

ADDED   gl-simple.fs
Index: gl-simple.fs
==================================================================
--- /dev/null
+++ gl-simple.fs
@@ -0,0 +1,25 @@
+\ simple opengl test
+
+[defined] init-opengl 0= constant standalone
+require gl-helper.fs
+also opengl
+also [IFDEF] android android [THEN]
+standalone [if] init-opengl buffer-init [then]
+
+: simple-init ( -- )
+    ['] VertexShader ['] FragmentShader create-program to program
+    program init  0e >y-pos
+    1e 0e 0e 1e glClearColor ;
+
+: draw ( -- )  none-tex
+    v0 >v
+    -1e -1e >xy  $FFFFFFFF rgba>c  n> v+
+     1e -1e >xy  $FFFFFFFF rgba>c  n> v+
+     0e  1e >xy  $FFFFFFFF rgba>c  n> v+ v>
+    i0 0 i, 1 i, 2 i,
+    GL_TRIANGLES draw-elements ;
+
+: simple ( -- )  simple-init
+  1 level# +!  begin clear draw sync >looper level# @ 0= until ;
+
+simple

Index: gl-terminal.fs
==================================================================
--- gl-terminal.fs
+++ gl-terminal.fs
@@ -96,12 +96,12 @@
 $ffbf4040 l, \ dimm Blue
 $ffbf40bf l, \ dimm Magenta
 $ffbfbf40 l, \ dimm Cyan
 $ffbfbfbf l, \ dimm White
 
-: term-load-textures ( -- )
-    chars-tex s" ascii.png" load-texture 2drop linear
+: term-load-textures ( addr u -- )
+    chars-tex load-texture 2drop linear
     GL_TEXTURE2 glActiveTexture
     color-tex color-matrix $10 1 rgba-map nearest
     GL_TEXTURE0 glActiveTexture ;
 
 Variable color-index
@@ -312,16 +312,17 @@
 default-out op-vector !
 
 \ initialize
 
 : term-init ( -- )
-    clazz >o hideProgress o>
+    [IFDEF] clazz clazz >o hideProgress o> [THEN]
     >screen-orientation
     create-terminal-program to terminal-program
-    terminal-program terminal-init term-load-textures form-chooser
+    terminal-program terminal-init
+    s" ascii.png" term-load-textures form-chooser
     unit-matrix MVPMatrix set-matrix ;
 
 :noname  defers window-init term-init config-changer ; IS window-init
 
 window-init
 
 previous previous \ remove opengl from search order

Index: gles2/gl-helper.fs
==================================================================
--- gles2/gl-helper.fs
+++ gles2/gl-helper.fs
@@ -207,12 +207,13 @@
     2r> 2swap ;
 
 Variable $attrib
 
 : >bindattrib ( xt program -- )  0 { prog idx } shader>string
-    BEGIN  s" attribute " >attrib extract-name dup  WHILE  $attrib $!
-	    prog idx $attrib $@ over + 0 swap c! glBindAttribLocation
+    BEGIN  s" attribute " >attrib extract-name dup  WHILE
+	    $attrib $!  0 $attrib c$+!
+	    prog idx $attrib $@ drop glBindAttribLocation
 	    idx 1+ to idx
     REPEAT  2drop 2drop ;
 
 : >univattrib ( xt program -- )  { prog }
     shader>string
@@ -406,16 +407,19 @@
     top bottom f+ top bottom f- f/ sf!+
     near far f+ near far f- f/ sf!+ -1e sf!+
     sfloat+ sfloat+ near far f* f2* near far f- f/ sf!+ 0e sf!+
     drop ;
 
+: ap-set ( -- )
+    ap-matrix MVPMatrix set-matrix
+    ap-matrix MVMatrix set-matrix ;
+
 : >ap ( near far scale -- ) f2* 1/f { f: scale }
     scale dpy-w @ fm* fdup fnegate fswap
     scale dpy-h @ fm* fdup fnegate fswap >ortho
     \ cr ap-matrix .matrix
-    ap-matrix MVPMatrix set-matrix
-    ap-matrix MVMatrix set-matrix ;
+    ap-set ;
 : >apxy ( xoff yoff -- )  y-apos sf!  x-apos sf! ;
 
 \ textures
 
 Create white-texture \ aabbggrr
@@ -510,26 +514,10 @@
     Ambient 1 ambient% glUniform1fv
     LightPos 0.0e 0.0e -0.3e glUniform3f
     z-bias set-color+
     .01e 100e dpy-w @ dpy-h @ min s>f f2/ 100 fm* >ap ;
 
-: 2d-vertex ( index addr -- ) >r
-    dup 2 GL_FLOAT  0 0 r> glVertexAttribPointer
-    glEnableVertexAttribArray ;
-
-: 3d-vertex ( index addr -- ) >r
-    dup 3 GL_FLOAT  0 0 r> glVertexAttribPointer
-    glEnableVertexAttribArray ;
-
-: 4d-vertex ( index addr -- ) >r
-    dup 4 GL_FLOAT  0 0 r> glVertexAttribPointer
-    glEnableVertexAttribArray ;
-
-: rgba-vertex ( index addr -- ) >r
-    dup 4 GL_UNSIGNED_BYTE GL_TRUE 0 r> glVertexAttribPointer
-    glEnableVertexAttribArray ;
-
 \ glDrawElements helper
 
 $8 cells buffer: gl-buffers
 : buf@ ( n -- buf ) cells gl-buffers + @ ;
 : bind-buf ( type n -- ) buf@ glBindBuffer ;

Index: gles2/gl-sample.fs
==================================================================
--- gles2/gl-sample.fs
+++ gles2/gl-sample.fs
@@ -1,10 +1,10 @@
 \ opengl example
 
 require gl-helper.fs
 
-also opengl
+also opengl also [IFDEF] android android [THEN]
 
 tex: ascii-tex
 
 : load-textures ( -- )
     ascii-tex s" ascii.png" load-texture wrap mipmap ;
@@ -37,21 +37,10 @@
 
 : normals >v
     3 0 DO  0e 0e -1e n>xyz v+  LOOP  o> ;
 
 Variable new-config
-
-[IFDEF] android
-also android
-
-:noname  defers window-init
-    ['] VertexShader ['] FragmentShader create-program to program
-    program init load-textures ; IS window-init
-
-:noname new-config on ; is config-changed
-[THEN]
-
 FVariable touch -100e touch f!
 FVariable motion 0.01e motion f!
 
 : draw-tri-angle ( f -- )
     0.01e 0.02e 0.15e 1.0e glClearColor
@@ -66,13 +55,10 @@
     ascii-tex
     GL_TRIANGLES draw-elements
     sync ;
 
 : draw-tri { f: angle -- angle' }
-    new-config @ IF
-	dpy-w @ dpy-h @ getwh dpy-w @ dpy-h @ d<> IF  new-config off  THEN
-    THEN
     angle draw-tri-angle
     >looper
     *input >r r@ IF
 	r@ action @ abs 1 <> IF
 	    \ ." Touch at " r@ x0 ? r@ y0 ? cr

ADDED   gles2/gl-simple.fs
Index: gles2/gl-simple.fs
==================================================================
--- /dev/null
+++ gles2/gl-simple.fs
@@ -0,0 +1,25 @@
+\ simple opengl test
+
+[defined] init-opengl 0= constant standalone
+require gl-helper.fs
+also opengl
+also [IFDEF] android android [THEN]
+standalone [if] init-opengl buffer-init [then]
+
+: simple-init ( -- )
+    ['] VertexShader ['] FragmentShader create-program to program
+    program init  0e >y-pos
+    1e 0e 0e 1e glClearColor ;
+
+: draw ( -- )  none-tex
+    v0 >v
+    -1e -1e >xy  $FFFFFFFF rgba>c  n> v+
+     1e -1e >xy  $FFFFFFFF rgba>c  n> v+
+     0e  1e >xy  $FFFFFFFF rgba>c  n> v+ v>
+    i0 0 i, 1 i, 2 i,
+    GL_TRIANGLES draw-elements ;
+
+: simple ( -- )  simple-init
+  1 level# +!  begin clear draw sync >looper level# @ 0= until ;
+
+simple

Index: gles2/gl-terminal.fs
==================================================================
--- gles2/gl-terminal.fs
+++ gles2/gl-terminal.fs
@@ -96,12 +96,12 @@
 $ffbf4040 l, \ dimm Blue
 $ffbf40bf l, \ dimm Magenta
 $ffbfbf40 l, \ dimm Cyan
 $ffbfbfbf l, \ dimm White
 
-: term-load-textures ( -- )
-    chars-tex s" ascii.png" load-texture 2drop linear
+: term-load-textures ( addr u -- )
+    chars-tex load-texture 2drop linear
     GL_TEXTURE2 glActiveTexture
     color-tex color-matrix $10 1 rgba-map nearest
     GL_TEXTURE0 glActiveTexture ;
 
 Variable color-index
@@ -312,16 +312,17 @@
 default-out op-vector !
 
 \ initialize
 
 : term-init ( -- )
-    clazz >o hideProgress o>
+    [IFDEF] clazz clazz >o hideProgress o> [THEN]
     >screen-orientation
     create-terminal-program to terminal-program
-    terminal-program terminal-init term-load-textures form-chooser
+    terminal-program terminal-init
+    s" ascii.png" term-load-textures form-chooser
     unit-matrix MVPMatrix set-matrix ;
 
 :noname  defers window-init term-init config-changer ; IS window-init
 
 window-init
 
 previous previous \ remove opengl from search order