1 files changed, 87 insertions, 0 deletions
diff --git a/qemu/roms/SLOF/slof/fs/graphics.fs b/qemu/roms/SLOF/slof/fs/graphics.fs
new file mode 100644
index 000000000..7d5d9306d
--- /dev/null
+++ b/qemu/roms/SLOF/slof/fs/graphics.fs
@@ -0,0 +1,87 @@
+\ *****************************************************************************
+\ * Copyright (c) 2015 IBM Corporation
+\ * All rights reserved.
+\ * This program and the accompanying materials
+\ * are made available under the terms of the BSD License
+\ * which accompanies this distribution, and is available at
+\ * http://www.opensource.org/licenses/bsd-license.php
+\ *
+\ * Contributors:
+\ *     IBM Corporation - initial implementation
+\ ****************************************************************************/
+
+\ Provide some of the functions that are defined in the
+\ "OF Recommended Practice: 8bit Graphics Extension" document
+
+: draw-rectangle ( adr x y w h -- )
+   frame-buffer-adr 0= IF 4drop drop EXIT THEN
+   0 ?DO
+      4dup drop                              ( adr x y w adr x y )
+      \ calculate offset into framebuffer: ((y + i) * width + x) * depth
+      i + screen-width * + screen-depth *    ( adr x y w adr offs )
+      frame-buffer-adr +                     ( adr x y w adr fb_adr )
+      over 3 pick screen-depth * i * +       ( adr x y w adr fb_adr src )
+      swap 3 pick screen-depth *             ( adr x y w adr src fb_adr len )
+      rmove                                  \ copy line ( adr x y w adr )
+      drop                                   ( adr x y w )
+   LOOP
+   4drop
+;
+
+: fill-rectangle ( col x y w h -- )
+   frame-buffer-adr 0= IF 4drop drop EXIT THEN
+   0 ?DO
+      4dup drop                              ( col x y w col x y )
+      \ calculate offset into framebuffer: ((y + i) * width + x) * depth
+      i + screen-width * + screen-depth *    ( col x y w col offs )
+      frame-buffer-adr +                     ( col x y w col adr )
+      2 pick screen-depth * 2 pick           ( col x y w col adr len col )
+      rfill                                  \ draw line ( col x y w col )
+      drop                                   ( col x y w )
+   LOOP
+   4drop
+;
+
+: read-rectangle ( adr x y w h -- )
+   frame-buffer-adr 0= IF 4drop drop EXIT THEN
+   0 ?DO
+      4dup drop                              ( adr x y w adr x y )
+      \ calculate offset into framebuffer: ((y + i) * width + x) * depth
+      i + screen-width * + screen-depth *    ( adr x y w adr offs )
+      frame-buffer-adr +                     ( adr x y w adr fb_adr )
+      over 3 pick screen-depth * i * +       ( adr x y w adr fb_adr dst )
+      3 pick                                 ( adr x y w adr fb_adr dst w )
+      rmove                                  \ copy line ( adr x y w adr )
+      drop                                   ( adr x y w )
+   LOOP
+   4drop
+;
+
+: dimensions ( -- width height )
+   screen-width screen-height
+;
+
+\ Initialize a default palette (not a standard command, but useful anyway)
+: init-default-palette
+   \ Grayscale ramp for upper colors
+   100 10 DO
+     i i i i color!
+   LOOP
+   \ Standard colors from "16-color Text Extension" specification
+   00 00 00 0 color!
+   00 00 aa 1 color!
+   00 aa 00 2 color!
+   00 aa aa 3 color!
+   aa 00 00 4 color!
+   aa 00 aa 5 color!
+   aa 55 00 6 color!
+   aa aa aa 7 color!
+   55 55 55 8 color!
+   55 55 ff 9 color!
+   55 ff 55 a color!
+   55 ff ff b color!
+   ff 55 55 c color!
+   ff 55 ff d color!
+   ff ff 55 e color!
+   ff ff ff f color!
+;