--- /dev/null
+\ tag: Display device management
+\
+\ this code implements IEEE 1275-1994 ch. 5.3.6
+\
+\ Copyright (C) 2003 Stefan Reinauer
+\
+\ See the file "COPYING" for further information about
+\ the copyright and warranty status of this work.
+\
+
+hex
+
+\
+\ 5.3.6.1 Terminal emulator routines
+\
+
+\ The following values are used and set by the terminal emulator
+\ defined and described in 3.8.4.2
+0 value line# ( -- line# )
+0 value column# ( -- column# )
+0 value inverse? ( -- white-on-black? )
+0 value inverse-screen? ( -- black? )
+0 value #lines ( -- rows )
+0 value #columns ( -- columns )
+
+\ The following values are used internally by both the 1-bit and the
+\ 8-bit frame-buffer support routines.
+
+0 value frame-buffer-adr ( -- addr )
+0 value screen-height ( -- height )
+0 value screen-width ( -- width )
+0 value window-top ( -- border-height )
+0 value window-left ( -- border-width )
+0 value char-height ( -- height )
+0 value char-width ( -- width )
+0 value fontbytes ( -- bytes )
+
+\ these values are used internally and do not represent any
+\ official open firmware words
+0 value char-min
+0 value char-num
+0 value font
+
+0 value foreground-color
+0 value background-color
+create color-palette 100 cells allot
+
+2 value font-spacing
+0 value depth-bits
+0 value line-bytes
+0 value display-ih
+
+\ internal values
+0 value openbios-video-height
+0 value openbios-video-width
+
+\ The following wordset is called the "defer word interface" of the
+\ terminal-emulator support package. It gets overloaded by fb1-install
+\ or fb8-install (initiated by the framebuffer fcode driver)
+
+defer draw-character ( char -- )
+defer reset-screen ( -- )
+defer toggle-cursor ( -- )
+defer erase-screen ( -- )
+defer blink-screen ( -- )
+defer invert-screen ( -- )
+defer insert-characters ( n -- )
+defer delete-characters ( n -- )
+defer insert-lines ( n -- )
+defer delete-lines ( n -- )
+defer draw-logo ( line# addr width height -- )
+
+defer fb-emit ( x -- )
+
+: depth-bytes ( -- bytes )
+ depth-bits 1+ 8 /
+;
+
+\
+\ 5.3.6.2 Frame-buffer support routines
+\
+
+: default-font ( -- addr width height advance min-char #glyphs )
+ (romfont) (romfont-width) (romfont-height) (romfont-height) 0 100
+ ;
+
+: set-font ( addr width height advance min-char #glyphs -- )
+ to char-num
+ to char-min
+ to fontbytes
+ font-spacing + to char-height
+ to char-width
+ to font
+ ;
+
+: >font ( char -- addr )
+ char-min -
+ char-num min
+ fontbytes *
+ font +
+ ;
+
+\
+\ 5.3.6.3 Display device support
+\
+
+\
+\ 5.3.6.3.1 Frame-buffer package interface
+\
+
+: is-install ( xt -- )
+ external
+ \ Create open and other methods for this display device.
+ \ Methods to be created: open, write, draw-logo, restore
+ s" open" header
+ 1 , \ colon definition
+ ,
+ ['] (lit) ,
+ -1 ,
+ ['] (semis) ,
+ reveal
+ s" : write dup >r bounds do i c@ fb-emit loop r> ; " evaluate
+ s" : draw-logo draw-logo ; " evaluate
+ s" : restore reset-screen ; " evaluate
+ ;
+
+: is-remove ( xt -- )
+ external
+ \ Create close method for this display device.
+ s" close" header
+ 1 , \ colon definition
+ ,
+ ['] (semis) ,
+ reveal
+ ;
+
+: is-selftest ( xt -- )
+ external
+ \ Create selftest method for this display device.
+ s" selftest" header
+ 1 , \ colon definition
+ ,
+ ['] (semis) ,
+ reveal
+ ;
+
+
+\ 5.3.6.3.2 Generic one-bit frame-buffer support (optional)
+
+: fb1-nonimplemented
+ ." Monochrome framebuffer support is not implemented." cr
+ end0
+ ;
+
+: fb1-draw-character fb1-nonimplemented ; \ historical
+: fb1-reset-screen fb1-nonimplemented ;
+: fb1-toggle-cursor fb1-nonimplemented ;
+: fb1-erase-screen fb1-nonimplemented ;
+: fb1-blink-screen fb1-nonimplemented ;
+: fb1-invert-screen fb1-nonimplemented ;
+: fb1-insert-characters fb1-nonimplemented ;
+: fb1-delete-characters fb1-nonimplemented ;
+: fb1-insert-lines fb1-nonimplemented ;
+: fb1-delete-lines fb1-nonimplemented ;
+: fb1-slide-up fb1-nonimplemented ;
+: fb1-draw-logo fb1-nonimplemented ;
+: fb1-install fb1-nonimplemented ;
+
+
+\ 5.3.6.3.3 Generic eight-bit frame-buffer support
+
+\ bind to low-level C function later
+defer fb8-blitmask
+defer fb8-fillrect
+defer fb8-invertrect
+
+: fb8-line2addr ( line -- addr )
+ window-top +
+ screen-width * depth-bytes *
+ frame-buffer-adr +
+ window-left depth-bytes * +
+;
+
+: fb8-curpos2addr ( col line -- addr )
+ char-height * fb8-line2addr
+ swap char-width * depth-bytes * +
+;
+
+: fb8-copy-lines ( count from to -- )
+ fb8-line2addr swap
+ fb8-line2addr swap
+ #columns char-width * depth-bytes *
+ 3 pick * move drop
+;
+
+: fb8-clear-lines ( count line -- )
+ background-color 0
+ 2 pick window-top +
+ #columns char-width *
+ 5 pick
+ fb8-fillrect
+ 2drop
+;
+
+: fb8-draw-character ( char -- )
+ \ erase the current character
+ background-color
+ column# char-width * window-left +
+ line# char-height * window-top +
+ char-width char-height fb8-fillrect
+ \ draw the character:
+ >font
+ line# char-height * window-top + screen-width * depth-bytes *
+ column# char-width * depth-bytes *
+ window-left depth-bytes * + + frame-buffer-adr +
+ swap char-width char-height font-spacing -
+ \ normal or inverse?
+ foreground-color background-color
+ inverse? if
+ swap
+ then
+ fb8-blitmask
+ ;
+
+: fb8-reset-screen ( -- )
+ false to inverse?
+ false to inverse-screen?
+ 0 to foreground-color
+ d# 15 to background-color
+
+ \ override with OpenBIOS defaults
+ fe to background-color
+ 0 to foreground-color
+ ;
+
+: fb8-toggle-cursor ( -- )
+ column# char-width * window-left +
+ line# char-height * window-top +
+ char-width char-height font-spacing -
+ foreground-color background-color
+ fb8-invertrect
+ ;
+
+: fb8-erase-screen ( -- )
+ inverse-screen? if
+ foreground-color
+ else
+ background-color
+ then
+ 0 0 screen-width screen-height
+ fb8-fillrect
+ ;
+
+: fb8-invert-screen ( -- )
+ 0 0 screen-width screen-height
+ background-color foreground-color
+ fb8-invertrect
+ ;
+
+: fb8-blink-screen ( -- )
+ fb8-invert-screen 2000 ms
+ fb8-invert-screen
+ ;
+
+: fb8-insert-characters ( n -- )
+ \ numcopy = ( #columns - column# - n )
+ #columns over - column# -
+ char-width * depth-bytes * ( n numbytescopy )
+
+ over column# + line# fb8-curpos2addr
+ column# line# fb8-curpos2addr ( n numbytescopy destaddr srcaddr )
+ char-height 0 do
+ 3dup swap rot move
+ line-bytes + swap line-bytes + swap
+ loop 3drop
+
+ background-color
+ column# char-width * window-left + line# char-height * window-top +
+ 3 pick char-width * char-height
+ fb8-fillrect
+ drop
+ ;
+
+: fb8-delete-characters ( n -- )
+ \ numcopy = ( #columns - column# - n )
+ #columns over - column# -
+ char-width * depth-bytes * ( n numbytescopy )
+
+ over column# + line# fb8-curpos2addr
+ column# line# fb8-curpos2addr swap ( n numbytescopy destaddr srcaddr )
+ char-height 0 do
+ 3dup swap rot move
+ line-bytes + swap line-bytes + swap
+ loop 3drop
+
+ background-color
+ over #columns swap - char-width * window-left + line# char-height * window-top +
+ 3 pick char-width * char-height
+ fb8-fillrect
+ drop
+ ;
+
+: fb8-insert-lines ( n -- )
+ \ numcopy = ( #lines - n )
+ #lines over - char-height *
+ over line# char-height *
+ swap char-height * over +
+ fb8-copy-lines
+
+ char-height * line# char-height *
+ fb8-clear-lines
+ ;
+
+: fb8-delete-lines ( n -- )
+ \ numcopy = ( #lines - ( line# + n )) * char-height
+ #lines over line# + - char-height *
+ over line# + char-height *
+ line# char-height *
+ fb8-copy-lines
+
+ #lines over - char-height *
+ dup #lines char-height * swap - swap
+ fb8-clear-lines
+ drop
+;
+
+
+: fb8-draw-logo ( line# addr width height -- )
+ 2swap swap
+ char-height * window-top +
+ screen-width * window-left +
+ frame-buffer-adr +
+ swap 2swap
+ \ in-fb-start-adr logo-adr logo-width logo-height
+
+ fb8-blitmask ( fbaddr mask-addr width height -- )
+;
+
+
+: fb8-install ( width height #columns #lines -- )
+
+ \ set state variables
+ to #lines
+ to #columns
+ to screen-height
+ to screen-width
+
+ screen-width #columns char-width * - 2/ to window-left
+ screen-height #lines char-height * - 2/ to window-top
+
+ 0 to column#
+ 0 to line#
+ 0 to inverse?
+ 0 to inverse-screen?
+
+ my-self to display-ih
+
+ \ set /chosen display property
+ my-self active-package 0 to my-self
+ " /chosen" (find-dev) 0<> if
+ active-package!
+ display-ih encode-int " display" property
+ then
+ active-package! to my-self
+
+ \ set defer functions to 8bit versions
+
+ ['] fb8-draw-character to draw-character
+ ['] fb8-toggle-cursor to toggle-cursor
+ ['] fb8-erase-screen to erase-screen
+ ['] fb8-blink-screen to blink-screen
+ ['] fb8-invert-screen to invert-screen
+ ['] fb8-insert-characters to insert-characters
+ ['] fb8-delete-characters to delete-characters
+ ['] fb8-insert-lines to insert-lines
+ ['] fb8-delete-lines to delete-lines
+ ['] fb8-draw-logo to draw-logo
+ ['] fb8-reset-screen to reset-screen
+
+ \ recommended practice
+ s" iso6429-1983-colors" get-my-property if
+ 0 ff
+ else
+ 2drop d# 15 0
+ then
+ to foreground-color to background-color
+
+ \ setup palette
+ 10101 ['] color-palette cell+ ff 0 do
+ dup 2 pick i * swap ! cell+
+ loop 2drop
+
+ \ special background color
+ ffffcc ['] color-palette cell+ fe cells + !
+
+ \ load palette onto the hardware
+ ['] color-palette cell+ ff 0 do
+ dup @ ff0000 and d# 16 rshift
+ 1 pick @ ff00 and d# 8 rshift
+ 2 pick @ ff and
+ i
+ s" color!" $find if
+ execute
+ else
+ 2drop
+ then
+ cell+
+ loop drop
+
+ \ ... but let's override with some better defaults
+ fe to background-color
+ 0 to foreground-color
+
+ fb8-erase-screen
+
+ \ If we have a startup splash then display it
+ [IFDEF] CONFIG_MOL
+ mol-startup-splash 2000 ms
+ fb8-erase-screen
+ [THEN]
+;
Code Review / kvmfornfv.git / blobdiff