325 lines
12 KiB
ArmAsm
325 lines
12 KiB
ArmAsm
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; -*- Mode: Lisp -*- Filename: pgr.s
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; Last Revision: 7-May-87
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;--------------------------------------------------------------------------;
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; ;
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; TI SCHEME -- PCS Compiler ;
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; Copyright 1985, 1986 (c) Texas Instruments ;
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; ;
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; David Bartley, Rusty Haddock ;
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; ;
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; MIT-Compatible Graphics Routines ;
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; ;
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;--------------------------------------------------------------------------;
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; Revisions:
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; ds - added support for EGA modes 14, 16
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; rb 11/5/86 - modified for clipping
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; rb 11/17/86 - graphics windows (they don't remember their state, though)
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; mrm 5/07/87 - special handling for setting mode 3
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; ttc 3/11/88 - added support for VGA mode 18
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(begin
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(define clear-graphics)
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(define clear-point)
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(define draw-point)
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(define draw-line-to)
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(define is-point-on?)
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(define position-pen)
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(define set-pen-color!)
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(define set-video-mode!)
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(define get-video-mode)
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(define draw-box-to)
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(define draw-filled-box-to)
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(define set-palette!)
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(define point-color) ;new with 3.0
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(define set-clipping-rectangle!) ; "
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(define graphics-window) ; "
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(define get-pen-position) ; "
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(define get-pen-color) ; "
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(define current-graphics-window) ; "
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(define reset-graphics) ;not documented
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)
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;;; A small note about the global variable PCS-MACHINE-TYPE:
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;;;
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;;; PCS-MACHINE-TYPE = 0 Machine type unknown
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;;; = 1 TIPC -or- TI Bus-Pro in TIPC mode
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;;; = 252 IBM-PC/AT
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;;; = 253 IBM-PC/jr
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;;; = 254 IBM-PC/XT
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;;; = 255 IBM-PC -or- TI Bus-Pro in PC/AT mode
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;;;
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;;; No variable CURRENTLY indicates whether or not the PC has
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;;; bit-mapped graphics capabilities. (This would be nice though.)
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(define *graphics-colors* ; *GRAPHICS-COLORS*
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(if (=? pcs-machine-type 1)
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'((black . 0) (blue . 1) (red . 2) (magenta . 3)
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(green . 4) (cyan . 5) (yellow . 6) (white . 7))
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'((black . 0) (cyan . 1) (magenta . 2) (white . 3)))) ; IBM mode #4
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(define *character-boxes* ; horiz x vert by graphics mode
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'((TI 9 . 12) (4 8 . 8) (14 8 . 8) (16 8 . 14) (18 8 . 16)))
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;;; extended MIT Graphics Procedures
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;;;
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;;; TI User coordinates: -360 <= X <= +359
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;;; -150 <= Y <= +149
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;;; IBM User coordinates: -160 <= X <= +159 For 320x200/4-color mode (#4)
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;;; -100 <= Y <= +99
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;;; IBM User coordinates: -320 <= X <= +319 For 640x200/16-color mode (#14)
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;;; -100 <= Y <= +99
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;;; IBM User coordinates: -320 <= X <= +319 For 640x350/16-color mode (#16)
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;;; -175 <= Y <= +174
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;;; IBM User coordinates: -320 <= X <= +319 For 640x480/16-color mode (#18)
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;;; -240 <= Y <= +239
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;;;
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;;; for IBM, mode 4 values are the default.
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;;;
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(let ((cur-x '()) ; X,Y should be in fixnum range, else get
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(cur-y '()) ; "invalid operand" error when %GRAPHICS executes
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(cur-w 'screen) ; use 'screen for screen, else have window here
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; note 'screen and 'console are *not* synonyms
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(cur-color '())
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(max-x (if (=? pcs-machine-type 1) 719 319))
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(max-y (if (=? pcs-machine-type 1) 299 199))
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(mid-x (if (=? pcs-machine-type 1) 360 160))
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(mid-y (if (=? pcs-machine-type 1) 149 99))
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(min-x 0)
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(min-y 0)
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(num-clrs (if (=? pcs-machine-type 1) 8 4)))
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(begin
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(if (=? pcs-machine-type 1)
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(set! clear-graphics ; CLEAR-GRAPHICS (TIPC)
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(lambda ()
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(reset-graphics)
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(if (not (eq? cur-w 'screen))
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(begin
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(graphics-window cur-w)
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(position-pen 0 0)
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(%graphics 7 0 0 1024 1024 0 0)) ; clear window to black
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(begin
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(%graphics 0 0 0 0 0 0 0) ; Clear the graphics planes
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(%graphics 0 3 0 0 0 0 0))) ; Enable both text & graphics planes
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'()))
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(set! clear-graphics ; CLEAR-GRAPHICS (IBM)
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(lambda ()
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(reset-graphics)
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(if (not (eq? cur-w 'screen))
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(begin
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(graphics-window cur-w)
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(position-pen 0 0)
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(%graphics 7 0 0 1024 1024 0 0)) ; clear window to black
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(%graphics 0 (get-video-mode)
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0 0 0 0 0)) ; IBM graphics and text are on same
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; plane and will SCROLL together!!!
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(%graphics 2 1 1 0 0 0 0) ; Ensure proper colors are used - CGA
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'())))
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(set! reset-graphics
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(lambda ()
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(if (=? pcs-machine-type 1)
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(begin ;TI
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(set! max-x 719)
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(set! max-y 299)
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(set! mid-x 359)
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(set! mid-y 149)
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(set! min-x 0)
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(set! min-y 0)
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(set! cur-color 7)
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(position-pen 0 0))
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(case (get-video-mode) ;IBM
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(4
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(set! max-x 319)
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(set! max-y 199)
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(set! mid-x 160)
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(set! mid-y 99)
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(set! min-x 0)
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(set! min-y 0)
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(set! num-clrs 4)
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(set! *graphics-colors*
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'((black . 0) (cyan . 1) (magenta . 2) (white . 3)))
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(set! cur-color (sub1 num-clrs))
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(position-pen 0 0))
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((14 16 18)
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(set! max-x 639)
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(set! mid-x 320)
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(set! min-x 0)
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(set! min-y 0)
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(set! num-clrs 16)
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(set! *graphics-colors*
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'((black . 0) (blue . 1) (green . 2) (cyan . 3)
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(red . 4) (magenta . 5) (brown . 6) (white . 7)
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(gray . 8) (light-blue . 9)
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(light-green . 10) (light-cyan . 11)
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(light-red . 12) (light-magenta . 13)
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(yellow . 14) (intense-white . 15)))
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(set! cur-color (sub1 num-clrs))
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(case (get-video-mode)
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(14
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(set! max-y 199)
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(set! mid-y 99))
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(16
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(set! max-y 349)
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(set! mid-y 174))
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(18
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(set! max-y 479)
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(set! mid-y 238)))
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(position-pen 0 0))
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(else
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'())) ; for other modes, do nothing
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)))
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(set! draw-point ; DRAW-POINT
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(lambda (x y)
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(%graphics 1 (+ x mid-x) (- mid-y y) cur-color 0 0 0)
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'()))
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(set! clear-point ; CLEAR-POINT
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(lambda (x y)
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(%graphics 1 (+ x mid-x) (- mid-y y) 0 0 0 0)
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'()))
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(set! is-point-on? ; IS-POINT-ON?
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(lambda (x y)
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(positive? (%graphics 4 (+ x mid-x) (- mid-y y) 0 0 0 0))))
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(set! point-color ; POINT-COLOR
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(lambda (x y)
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(%graphics 4 (+ x mid-x) (- mid-y y) 0 0 0 0)))
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(set! position-pen ; POSITION-PEN
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(lambda (x y)
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(set! cur-x (+ x mid-x))
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(set! cur-y (- mid-y y))
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'()))
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(set! get-pen-position ; GET-PEN-POSITION
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(lambda ()
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(cons (- cur-x mid-x) (- mid-y cur-y))))
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(set! draw-line-to ; DRAW-LINE-TO
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(lambda (x y)
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(let ((old-x cur-x)
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(old-y cur-y))
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(position-pen x y)
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(%graphics 3 old-x old-y cur-x cur-y cur-color 0)
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'())))
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(set! set-pen-color! ; SET-PEN-COLOR!
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(lambda (color)
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(set! cur-color
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(if (integer? color)
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(remainder (abs color) num-clrs)
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(let ((entry (assq color *graphics-colors*)))
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(if entry
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(remainder (abs (cdr entry)) num-clrs)
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(-1+ num-clrs)))))))
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(set! get-pen-color ; GET-PEN-COLOR
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(lambda () cur-color))
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(set! set-video-mode! ; SET-VIDEO-MODE!
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(lambda (mode)
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(%graphics 0 mode 0 0 0 0 0)
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(case pcs-machine-type
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(1 ;TI mode - do nothing special
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'())
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(else ;default to IBM
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(case mode
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(3 ;IBM CGA
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(window-set-attribute! pcs-status-window
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'text-attributes #x70))
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((14 16 18) ;IBM EGA or VGA
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(window-set-attribute! pcs-status-window
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'text-attributes #x87)))
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(set! cur-w 'screen)
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(if (<> mode 3)
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(reset-graphics)))) ;if you're switching modes in IBM,
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;it makes sense to do this too
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'()))
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(set! get-video-mode ; GET-VIDEO-MODE
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(lambda ()
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(%graphics 5 0 0 0 0 0 0)))
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(set! draw-box-to ; DRAW-BOX-TO
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(lambda (x y)
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(let ((old-x cur-x)
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(old-y cur-y))
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(set! cur-x (+ x mid-x))
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(set! cur-y (- mid-y y))
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(%graphics 6 old-x old-y cur-x cur-y cur-color 0)
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'())))
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(set! draw-filled-box-to ; DRAW-FILLED-BOX-TO
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(lambda (x y)
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(let ((old-x cur-x)
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(old-y cur-y))
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(set! cur-x (+ x mid-x))
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(set! cur-y (- mid-y y))
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(%graphics 7 old-x old-y cur-x cur-y cur-color 0)
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'())))
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(set! set-palette! ; SET-PALETTE!
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(lambda (arg1 arg2)
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(when (not (and (integer? arg1)
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(integer? arg2)))
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(%error-invalid-operand-list 'SET-PALETTE! arg1 arg2))
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(when (and (>=? pcs-machine-type #xFC) ; IBM
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(=? arg1 1)
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(=? (get-video-mode) 4))
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(set! *graphics-colors*
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(if (odd? arg2)
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'((black . 0)(cyan . 1)(magenta . 2)(white . 3))
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'((black . 0)(green . 1)(red . 2)(yellow . 3)))))
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(%graphics 2 arg1 arg2 0 0 0 0)
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'()))
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(set! set-clipping-rectangle! ; SET-CLIPPING-RECTANGLE!
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(lambda (x1 y1 x2 y2) ;left, top, right, bottom
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(%graphics 8 (min max-x (max min-x (+ x1 mid-x)))
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(min max-y (max min-y (- mid-y y1)))
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(max min-x (min max-x (+ x2 mid-x)))
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(max min-y (min max-y (- mid-y y2))) 0 0)
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'()))
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(set! current-graphics-window ; CURRENT-GRAPHICS-WINDOW
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(lambda () cur-w))
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(set! graphics-window ; GRAPHICS-WINDOW
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(lambda (window)
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(let ((w (if (eq? window 'screen) 'console window)))
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(let ((size (window-get-size w))
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(pos (window-get-position w))
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(cbox (cdr (assv (cond ((= pcs-machine-type 1) 'TI)
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((>= pcs-machine-type #xFC) (get-video-mode))
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(else pcs-machine-type))
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*character-boxes*))))
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(if (null? cbox) (error "Current video mode is not a graphics mode." (get-video-mode)))
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(let* ((left (* (cdr pos) (car cbox)))
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(top (* (car pos) (cdr cbox)))
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(right (sub1 (+ left (* (cdr size) (car cbox)))))
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(bottom (sub1 (+ top (* (car size) (cdr cbox))))))
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(%graphics 8 left top right bottom 0 0)
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(set! mid-x (quotient (+ left right) 2))
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(set! mid-y (quotient (+ top bottom) 2))
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(set! min-x left)
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(set! min-y top)
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(set! max-x right)
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(set! max-y bottom)
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(set! cur-w window)
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(list (list (- min-x mid-x) (- mid-y min-y)
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(- max-x mid-x) (- mid-y max-y))
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(list left top right bottom)))))))
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'#!false))
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