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Add MGTK Font file support for Preview.

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Correct docs for some DeskTop icon APIs, and improve resilience of
some of the APIs to having atypical grafports selected when called.
This commit is contained in:
Joshua Bell 2019-07-26 20:44:22 -07:00
parent 6e96eae7ed
commit 157c6a3f0c
10 changed files with 564 additions and 67 deletions
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16
APIs.md
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@ -178,13 +178,13 @@ Removes an icon by number.
Parameters: { byte window_id }
Highlights (selects) all icons in a window.
Highlights (selects) all icons in specified window (0 = desktop).
### `DT_UNHIGHLIGHT_ALL` ($06)
### `DT_REMOVE_ALL` ($06)
Parameters: _N/A_
Parameters: { byte window_id }
Unhighlights (deselects) all icons.
Removes all icons from specified window (0 = desktop).
### `DT_CLOSE_WINDOW` ($07)
@ -234,13 +234,11 @@ Parameters: { byte icon, rect bounds }
Tests to see if the given icon (by number) overlaps the passed rect.
### `DT_REDRAW_ICON_IDX` ($0E)
### `DT_ERASE_ICON` ($0E)
Parameters: { byte icon_index }
Redraws the icon at the given index in the icon list. Note that this
is not the same as the icon number.
Parameters: { byte icon }
Erases the specified icon by number. No error checking is done.
<!-- ============================================================ -->

22
RELEASE-NOTES.md
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@ -56,17 +56,21 @@ functionality (see below).
### Automatic Preview
Text and Graphics files with the correct file types can be previewed
without leaving DeskTop; select the file icon then select File > Open,
or double-click the file icon. Text files must be type TXT ($04).
Graphics files must be type FOT ($08), or BIN ($06) with an aux type
of $2000 or $4000 and 17 or 33 blocks (hi-res/double hi-res) or $5800
and 3 blocks (Minipix a.k.a. Print Shop).
Text, Graphics and Font files with the correct file types can be
previewed without leaving DeskTop; select the file icon then select
File > Open, or double-click the file icon.
* Text files must be type TXT ($04).
* Graphics files must be type FOT ($08), or BIN ($06) with an aux type
of $2000 or $4000 and 17 or 33 blocks (hi-res/double hi-res) or $5800
and 3 blocks (Minipix a.k.a. Print Shop).
* Font files must be MGTK fonts with type FNT ($07).
To preview files of other types, you can copy the preview handlers
named `SHOW.TEXT.FILE` and `SHOW.IMAGE.FILE` from the `PREVIEW` folder
to the `DESK.ACC` folder, and restart DeskTop. To use them, select the
file, then select the appropriate command from the Apple menu.
named `SHOW.TEXT.FILE`, `SHOW.IMAGE.FILE`, etc. from the `PREVIEW`
folder to the `DESK.ACC` folder, and restart DeskTop. To use them,
select the file, then select the appropriate command from the Apple
menu.
### Notable Fixes

4
desktop.inc
View File

@ -95,7 +95,7 @@ DT_HIGHLIGHT_ICON = $02 ; { .byte icon }
DT_REDRAW_ICON = $03 ; { .byte icon }
DT_REMOVE_ICON = $04 ; { .byte icon }
DT_HIGHLIGHT_ALL = $05 ; { .byte window_id }
DT_UNHIGHLIGHT_ALL = $06
DT_REMOVE_ALL = $06 ; { .byte window_id }
DT_CLOSE_WINDOW = $07 ; { .byte window_id }
DT_GET_HIGHLIGHTED = $08 ; { .res 20 }
DT_FIND_ICON = $09 ; { .word mousex, .word mousey, .byte result }
@ -107,7 +107,7 @@ DT_DRAG_HIGHLIGHTED = $0A ; { .byte param }
DT_UNHIGHLIGHT_ICON = $0B ; { .addr iconentry }
DT_REDRAW_ICONS = $0C ; Repaints desktop icons *
DT_ICON_IN_RECT = $0D ; { .byte icon, rect bounds }
DT_REDRAW_ICON_IDX = $0E ; { .byte icon_index }
DT_ERASE_ICON = $0E ; { .byte icon }
;;; `icon` is the icon number, i.e. first field in icon entry
;;; `icon_index` is the index in the icon table

119
desktop/desktop_aux.s
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@ -402,7 +402,7 @@ desktop_jump_table:
.addr REDRAW_ICON_IMPL
.addr REMOVE_ICON_IMPL
.addr HIGHLIGHT_ALL_IMPL
.addr UNHIGHLIGHT_ALL_IMPL
.addr REMOVE_ALL_IMPL
.addr CLOSE_WINDOW_IMPL
.addr GET_HIGHLIGHTED_IMPL
.addr FIND_ICON_IMPL
@ -410,7 +410,7 @@ desktop_jump_table:
.addr UNHIGHLIGHT_ICON_IMPL
.addr REDRAW_ICONS_IMPL
.addr ICON_IN_RECT_IMPL
.addr REDRAW_ICON_IDX_IMPL
.addr ERASE_ICON_IMPL
.macro DESKTOP_DIRECT_CALL op, addr, label
jsr DESKTOP_DIRECT
@ -521,6 +521,8 @@ sub: ldx num_icons ; ???
;;; ============================================================
;;; HIGHLIGHT_ICON IMPL
;;; param is pointer to icon id
.proc HIGHLIGHT_ICON_IMPL
PARAM_BLOCK params, $06
ptr_icon: .addr 0
@ -541,7 +543,7 @@ bail1: return #1 ; Not found
: asl a
tax
copy16 icon_ptrs,x, ptr
copy16 icon_ptrs,x, ptr ; ptr now points at IconEntry
ldy #IconEntry::state
lda (ptr),y
bne :+ ; Already set ??? Routine semantics are incorrect ???
@ -582,13 +584,23 @@ L949D: ldx highlight_count
ldx #1 ; new position
jsr change_icon_index
jsr paint_icon_highlighted
;; Redraw
ldy #IconEntry::id
lda (ptr),y ; icon num
sta icon
DESKTOP_DIRECT_CALL DT_REDRAW_ICON, icon
return #0 ; Highlighted
;; DT_REDRAW_ICON params
icon: .byte 0
.endproc
;;; ============================================================
;;; REDRAW_ICON IMPL
;;; * Assumes correct grafport already selected/maprect specified
;;; * Does not erase background
.proc REDRAW_ICON_IMPL
PARAM_BLOCK params, $06
ptr_icon: .addr 0
@ -672,7 +684,7 @@ found: asl a
;; Unhighlight
: jsr calc_icon_poly
jsr draw_icon
jsr erase_icon
;; Move it to the end of the icon list
ldy #IconEntry::id
@ -723,9 +735,9 @@ done: return #0 ; Unhighlighted
.endproc
;;; ============================================================
;;; REDRAW_ICON_IDX IMPL
;;; ERASE_ICON IMPL
.proc REDRAW_ICON_IDX_IMPL
.proc ERASE_ICON_IMPL
PARAM_BLOCK params, $06
ptr_icon_idx: .addr 0
END_PARAM_BLOCK
@ -736,7 +748,7 @@ ptr_icon_idx: .addr 0
asl a
tax
copy16 icon_ptrs,x, ptr
jmp draw_icon
jmp erase_icon
.endproc
;;; ============================================================
@ -821,35 +833,47 @@ loop2: lda buffer,x
.endproc
;;; ============================================================
;;; UNHIGHLIGHT_ALL IMPL
;;; REMOVE_ALL IMPL
.proc UNHIGHLIGHT_ALL_IMPL
jmp L9697
;;; param is window id (0 = desktop)
L9695: .byte 0
L9696: .byte 0
.proc REMOVE_ALL_IMPL
jmp start
L9697: lda num_icons
sta L9696
L969D: ldx L9696
PARAM_BLOCK params, $06
ptr_window_id: .addr 0
END_PARAM_BLOCK
icon_ptr := $08
;; DT_REMOVE_ICON params
icon: .byte 0
count: .byte 0
start: lda num_icons
sta count
loop: ldx count
cpx #0
beq L96CF
dec L9696
beq done
dec count
dex
lda icon_table,x
sta L9695
sta icon
asl a
tax
copy16 icon_ptrs,x, $08
copy16 icon_ptrs,x, icon_ptr
ldy #IconEntry::win_type
lda ($08),y
lda (icon_ptr),y
and #icon_entry_winid_mask
ldy #0
cmp ($06),y
bne L969D
DESKTOP_DIRECT_CALL DT_REMOVE_ICON, L9695
jmp L969D
L96CF: return #0
cmp (params::ptr_window_id),y
bne loop
DESKTOP_DIRECT_CALL DT_REMOVE_ICON, icon
jmp loop
done: return #0
.endproc
;;; ============================================================
@ -1392,7 +1416,7 @@ L9BF3: dex
tax
copy16 icon_ptrs,x, $06
jsr calc_icon_poly
jsr draw_icon
jsr erase_icon
pla
tax
jmp L9BF3
@ -1612,18 +1636,12 @@ L9EB4: asl a
;;; ============================================================
;;; UNHIGHLIGHT_ICON IMPL
;;; param is pointer to icon entry
;;; param is pointer to IconEntry
.proc UNHIGHLIGHT_ICON_IMPL
PARAM_BLOCK params, $06
ptr_iconent: .addr 0
END_PARAM_BLOCK
ptr := $06 ; Overwrites param
jmp start
;; DT_REDRAW_ICON params
icon: .byte 0
start: lda has_highlight
bne :+
@ -1642,15 +1660,18 @@ start: lda has_highlight
dec highlight_count
lda highlight_count
bne :+
lda #0
lda #0 ; Clear flag if no more highlighted
sta has_highlight
;; Redraw
: ldy #0
: ldy #IconEntry::id
lda (params::ptr_iconent),y
sta icon
DESKTOP_DIRECT_CALL DT_REDRAW_ICON, icon
return #0
;; DT_REDRAW_ICON params
icon: .byte 0
.endproc
;;; ============================================================
@ -1704,7 +1725,9 @@ L9F8F: return #1
.endproc
;;; ============================================================
;;; Paint icon
;;; * Assumes grafport selected and maprect configured
;;; * Does not erase background
icon_flags: ; bit 7 = highlighted, bit 6 = volume icon
.byte 0
@ -1808,8 +1831,10 @@ highlighted: copy #$80, icon_flags ; is highlighted
bit icon_flags ; volume icon (on desktop) ?
bvc do_paint ; nope
;; TODO: This depends on a previous proc having adjusted
;; the grafport (for window maprect and window's items/used/free bar)
;; Redraw desktop background
;; Volume (i.e. icon on desktop)
MGTK_CALL MGTK::InitPort, grafport
jsr set_port_for_vol_icon
: jsr calc_window_intersections
@ -2055,6 +2080,10 @@ LA2AA: jsr pop_pointers
rts
LA2AE: jsr push_pointers
MGTK_CALL MGTK::InitPort, icon_grafport
MGTK_CALL MGTK::SetPort, icon_grafport
ldx num_icons
dex
LA2B5: bmi LA2AA
@ -2221,8 +2250,9 @@ stash: .word 0
.endproc
;;; ============================================================
;;; Erase an icon; redraws overlapping icons as needed
draw_icon:
erase_icon:
MGTK_CALL MGTK::InitPort, icon_grafport
MGTK_CALL MGTK::SetPort, icon_grafport
jmp LA3B9
@ -2259,13 +2289,13 @@ window_id: .byte 0
;; File (i.e. icon in window)
copy #$80, LA3B7
MGTK_CALL MGTK::SetPattern, white_pattern
MGTK_CALL MGTK::FrontWindow, frontwindow_params
MGTK_CALL MGTK::FrontWindow, frontwindow_params ; Use window's port
lda frontwindow_params::window_id
sta getwinport_params::window_id
MGTK_CALL MGTK::GetWinPort, getwinport_params
jsr LA4CC
jsr shift_port_down
jsr erase_icon
jsr shift_port_down ; Further offset by window's items/used/free bar
jsr erase_window_icon
jmp LA446
;; Volume (i.e. icon on desktop)
@ -2291,7 +2321,7 @@ volume:
;; fall through
.endproc
.proc erase_icon
.proc erase_window_icon
copy16 poly::v0::ycoord, LA3B1
copy16 poly::v6::xcoord, LA3AF
COPY_BLOCK poly::v4, LA3B3
@ -2312,6 +2342,7 @@ LA446: jsr push_pointers
bne LA466
bit LA3B7 ; no, almost done
bpl :+
;; TODO: Is this restoration necessary?
MGTK_CALL MGTK::InitPort, icon_grafport
MGTK_CALL MGTK::SetPort, icon_grafport
: jsr pop_pointers
@ -2895,7 +2926,7 @@ vert: cmp16 win_t, cr_t
;;; ============================================================
.proc shift_port_down
;; For window's used/free space bar
;; For window's items/used/free space bar
offset = 15
add16 icon_grafport::viewloc::ycoord, #offset, icon_grafport::viewloc::ycoord

11
desktop/desktop_main.s
View File

@ -920,6 +920,10 @@ begin:
bne :+
addr_jump invoke_desk_acc, str_preview_txt
: cmp #FT_FONT
bne :+
addr_jump invoke_desk_acc, str_preview_fnt
: cmp #DA_FILE_TYPE
bne :+
addr_jump invoke_desk_acc, path
@ -927,7 +931,7 @@ begin:
: lda #ERR_FILE_NOT_OPENABLE
jsr show_alert_and_fail
launch: DESKTOP_RELAY_CALL DT_UNHIGHLIGHT_ALL
launch: DESKTOP_RELAY_CALL DT_REMOVE_ALL, 0 ; volume icons
MGTK_RELAY_CALL MGTK::CloseAll
MGTK_RELAY_CALL MGTK::SetMenu, blank_menu
ldx buf_win_path
@ -10812,7 +10816,7 @@ L969E: lda #$40
ldx L9706
lda selected_icon_list,x
sta icon_param2
yax_call JT_DESKTOP_RELAY, DT_REDRAW_ICON_IDX, icon_param2
yax_call JT_DESKTOP_RELAY, DT_ERASE_ICON, icon_param2
copy16 L9707, $08
ldx L9706
lda selected_icon_list,x
@ -15390,6 +15394,9 @@ reset_grafport3a:
str_preview_fot:
PASCAL_STRING "Preview/show.image.file"
str_preview_fnt:
PASCAL_STRING "Preview/show.font.file"
str_preview_txt:
PASCAL_STRING "Preview/show.text.file"

2
desktop/ovl1.s
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@ -43,7 +43,7 @@ str_desktop2:
start: lda #$80
sta ptr
DESKTOP_RELAY_CALL DT_UNHIGHLIGHT_ALL
DESKTOP_RELAY_CALL DT_REMOVE_ALL, 0 ; volume icons
MGTK_RELAY_CALL MGTK::CloseAll
MGTK_RELAY_CALL MGTK::SetZP1, ptr

1
inc/prodos.inc
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@ -94,6 +94,7 @@ FT_TYPELESS = $00
FT_BAD = $01
FT_TEXT = $04 ; ASCII Text File *
FT_BINARY = $06 ; Generic Binary File *
FT_FONT = $07 ; Font File
FT_GRAPHICS = $08 ; Graphics File
FT_DIRECTORY = $0F ; Directory *
FT_ADB = $19 ; AppleWorks Database *

5
preview/README.md
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@ -10,6 +10,8 @@ File > Open is run or the files are double-clicked.
* [show.image.file](show.image.file.s)
* Handles image files (FOT $08)
* 8k Hires or 16k Double Hires images are supported
* [show.font.file](show.font.file.s)
* Handles MGTK font files (FNT $07)
The files can optionally be copied into the `DESK.ACC` directory to
allow direct invocation from the Apple menu. This can be useful to
@ -20,3 +22,6 @@ See [API.md](../desk.acc/API.md) for programming details.
See the DA [README.md](../desk.acc/README.md) for build and installation
details.
NOTE: ProDOS file type FNT $07 is reserved for Apple /// SOS font
files, but given their scarcity the type is re-used here.

1
preview/TARGETS
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@ -1,2 +1,3 @@
show.text.file
show.image.file
show.font.file

450
preview/show.font.file.s Normal file
View File

@ -0,0 +1,450 @@
.feature string_escapes
.setcpu "6502"
.include "apple2.inc"
.include "../macros.inc"
.include "../inc/apple2.inc"
.include "../inc/prodos.inc"
.include "../mgtk.inc"
.include "../desktop.inc"
;;; ============================================================
.org $800
jmp entry
;;; ============================================================
pathbuf: .res 65, 0
font_buffer := $D00
io_buf := WINDOW_ICON_TABLES
read_length = WINDOW_ICON_TABLES-font_buffer
DEFINE_OPEN_PARAMS open_params, pathbuf, io_buf
DEFINE_READ_PARAMS read_params, font_buffer, read_length
DEFINE_CLOSE_PARAMS close_params
;;; ============================================================
;;; Get filename by checking DeskTop selected window/icon
entry:
.proc get_filename
;; Check that an icon is selected
lda #0
sta pathbuf
lda selected_file_count
beq abort ; some file properties?
lda path_index ; prefix index in table
bne :+
abort: rts
;; Copy path (prefix) into pathbuf.
: src := $06
dst := $08
asl a ; (since address table is 2 bytes wide)
tax
copy16 path_table,x, src
ldy #0
lda (src),y
tax
inc src
bne :+
inc src+1
: copy16 #pathbuf+1, dst
jsr copy_pathbuf ; copy x bytes (src) to (dst)
;; Append separator.
lda #'/'
ldy #0
sta (dst),y
inc pathbuf
inc dst
bne :+
inc dst+1
;; Get file entry.
: lda selected_file_list ; file index in table
asl a ; (since table is 2 bytes wide)
tax
copy16 file_table,x, src
;; Exit if a directory.
ldy #2 ; 2nd byte of entry
lda (src),y
and #icon_entry_type_mask
bne :+
rts ; 000 = directory
;; Set window title to point at filename (9th byte of entry)
;; (title includes the spaces before/after from the icon)
: clc
lda src
adc #IconEntry::len
sta winfo_title
lda src+1
adc #0
sta winfo_title+1
;; Append filename to path.
ldy #IconEntry::len
lda (src),y ; grab length
tax ; name has spaces before/after
dex ; so subtract 2 to get actual length
dex
clc
lda src
adc #11 ; 9 = length, 10 = space, 11 = name
sta src
bcc :+
inc src+1
: jsr copy_pathbuf ; copy x bytes (src) to (dst)
jmp load_file_and_run_da
.proc copy_pathbuf ; copy x bytes from src to dst
ldy #0 ; incrementing path length and dst
loop: lda (src),y
sta (dst),y
iny
inc pathbuf
dex
bne loop
tya
clc
adc dst
sta dst
bcc end
inc dst+1
end: rts
.endproc
.endproc
;;; ============================================================
;;; Load the file
.proc load_file_and_run_da
;; TODO: Ensure there's enough room, fail if not
;; NOTE: This only leaves $1000-$1AFF (2816 bytes)
;; which is not enough for all the wide fonts.
;; --------------------------------------------------
;; Load the file
sta ALTZPOFF
MLI_CALL OPEN, open_params ; TODO: Check for error
lda open_params::ref_num
sta read_params::ref_num
sta close_params::ref_num
MLI_CALL READ, read_params ; TODO: Check for error
MLI_CALL CLOSE, close_params
sta ALTZPON
;; --------------------------------------------------
;; Copy the DA code and loaded data to AUX
lda ROMIN2
copy16 #DA_LOAD_ADDRESS, STARTLO
copy16 #WINDOW_ICON_TABLES-1, ENDLO
copy16 #DA_LOAD_ADDRESS, DESTINATIONLO
sec ; main>aux
jsr AUXMOVE
lda LCBANK1
lda LCBANK1
;; --------------------------------------------------
;; Run the DA from Aux, back to Main when done
sta RAMRDON
sta RAMWRTON
jsr init
sta RAMRDOFF
sta RAMWRTOFF
rts
.endproc
;;; ============================================================
da_window_id = 60
da_width = 380
da_height = 140
da_left = (screen_width - da_width)/2
da_top = (screen_height - da_height)/2
.proc winfo
window_id: .byte da_window_id
options: .byte MGTK::Option::go_away_box
title: .addr 0 ; overwritten to point at filename
hscroll: .byte MGTK::Scroll::option_none
vscroll: .byte MGTK::Scroll::option_none
hthumbmax: .byte 32
hthumbpos: .byte 0
vthumbmax: .byte 32
vthumbpos: .byte 0
status: .byte 0
reserved: .byte 0
mincontwidth: .word da_width
mincontlength: .word da_height
maxcontwidth: .word da_width
maxcontlength: .word da_height
port:
viewloc: DEFINE_POINT da_left, da_top
mapbits: .addr MGTK::screen_mapbits
mapwidth: .word MGTK::screen_mapwidth
maprect: DEFINE_RECT 0, 0, da_width, da_height
pattern: .res 8, $FF
colormasks: .byte MGTK::colormask_and, MGTK::colormask_or
penloc: DEFINE_POINT 0, 0
penwidth: .byte 2
penheight: .byte 1
penmode: .byte 0
textback: .byte $7F
textfont: .addr font_buffer
nextwinfo: .addr 0
.endproc
winfo_title := winfo::title
;;; ============================================================
.proc event_params
kind: .byte 0
;;; EventKind::key_down
key := *
modifiers := * + 1
;;; EventKind::update
window_id := *
;;; otherwise
xcoord := *
ycoord := * + 2
.res 4
.endproc
.proc findwindow_params
mousex: .word 0
mousey: .word 0
which_area: .byte 0
window_id: .byte 0
.endproc
.proc trackgoaway_params
clicked: .byte 0
.endproc
.proc dragwindow_params
window_id: .byte 0
dragx: .word 0
dragy: .word 0
moved: .byte 0
.endproc
.proc winport_params
window_id: .byte da_window_id
port: .addr grafport
.endproc
.proc grafport
viewloc: DEFINE_POINT 0, 0
mapbits: .word 0
mapwidth: .word 0
cliprect: DEFINE_RECT 0, 0, 0, 0
pattern: .res 8, 0
colormasks: .byte 0, 0
penloc: DEFINE_POINT 0, 0
penwidth: .byte 0
penheight: .byte 0
penmode: .byte 0
textback: .byte 0
textfont: .addr 0
.endproc
.proc drawtext_params_char
.addr char_label
.byte 1
.endproc
char_label: .byte 0
;;; ============================================================
;;; ============================================================
.proc init
MGTK_CALL MGTK::OpenWindow, winfo
jsr draw_window
MGTK_CALL MGTK::FlushEvents
;; fall through
.endproc
.proc input_loop
MGTK_CALL MGTK::GetEvent, event_params
bne exit
lda event_params::kind
cmp #MGTK::EventKind::button_down ; was clicked?
bne :+
jmp handle_down
: cmp #MGTK::EventKind::key_down ; any key?
bne :+
jmp handle_key
: jmp input_loop
.endproc
.proc exit
MGTK_CALL MGTK::CloseWindow, winfo
DESKTOP_CALL DT_REDRAW_ICONS
rts ; exits input loop
.endproc
;;; ============================================================
.proc handle_key
lda event_params::key
cmp #CHAR_ESCAPE
bne :+
jmp exit
: jmp input_loop
.endproc
;;; ============================================================
.proc handle_down
copy16 event_params::xcoord, findwindow_params::mousex
copy16 event_params::ycoord, findwindow_params::mousey
MGTK_CALL MGTK::FindWindow, findwindow_params
bpl :+
jmp exit
: lda findwindow_params::window_id
cmp winfo::window_id
bpl :+
jmp input_loop
: lda findwindow_params::which_area
cmp #MGTK::Area::close_box
beq handle_close
cmp #MGTK::Area::dragbar
beq handle_drag
jmp input_loop
.endproc
;;; ============================================================
.proc handle_close
MGTK_CALL MGTK::TrackGoAway, trackgoaway_params
lda trackgoaway_params::clicked
bne :+
jmp input_loop
: jmp exit
.endproc
;;; ============================================================
.proc handle_drag
copy winfo::window_id, dragwindow_params::window_id
copy16 event_params::xcoord, dragwindow_params::dragx
copy16 event_params::ycoord, dragwindow_params::dragy
MGTK_CALL MGTK::DragWindow, dragwindow_params
lda dragwindow_params::moved
bpl :+
;; Draw DeskTop's windows (from Main)
sta RAMRDOFF
sta RAMWRTOFF
jsr JUMP_TABLE_REDRAW_ALL
sta RAMRDON
sta RAMWRTON
;; Draw DA's window
jsr draw_window
;; Draw DeskTop icons
DESKTOP_CALL DT_REDRAW_ICONS
: jmp input_loop
.endproc
;;; ============================================================
line1: PASCAL_STRING "\x00 \x01 \x02 \x03 \x04 \x05 \x06 \x07 \x08 \x09 \x0A \x0B \x0C \x0D \x0E \x0F"
line2: PASCAL_STRING "\x10 \x11 \x12 \x13 \x14 \x15 \x16 \x17 \x18 \x19 \x1A \x1B \x1C \x1D \x1E \x1F"
line3: PASCAL_STRING " ! \x22 # $ % & ' ( ) * + , - . /"
line4: PASCAL_STRING "0 1 2 3 4 5 6 7 8 9 : ; < = > ?"
line5: PASCAL_STRING "@ A B C D E F G H I J K L M N O"
line6: PASCAL_STRING "P Q R S T U V W X Y Z [ \x5C ] ^ _"
line7: PASCAL_STRING "` a b c d e f g h i j k l m n o"
line8: PASCAL_STRING "p q r s t u v w x y z { | } ~ \x7F"
line_count = 8
line_addrs:
.addr line1, line2, line3, line4, line5, line6, line7, line8
pos: DEFINE_POINT 0,0, pos
initial_y = 5
line_height = 15
.proc draw_window
ptr := $06
PARAM_BLOCK params, $06
data: .addr 0
len: .byte 0
width: .word 0
END_PARAM_BLOCK
MGTK_CALL MGTK::GetWinPort, winport_params
cmp #MGTK::Error::window_obscured
bne :+
rts
: MGTK_CALL MGTK::SetPort, grafport
MGTK_CALL MGTK::HideCursor
copy16 #initial_y, pos::ycoord
copy #0, index
loop: lda index
asl
tax
copy16 line_addrs,x, ptr
ldy #0
lda (ptr),y ; length
sta params::len
add16 ptr, #1, params::data ; offset past length
;; Position the string
MGTK_CALL MGTK::TextWidth, params
sub16 #da_width, params::width, pos::xcoord ; center it
lsr16 pos::xcoord
add16 pos::ycoord, #line_height, pos::ycoord ; next row
MGTK_CALL MGTK::MoveTo, pos
MGTK_CALL MGTK::DrawText, params
inc index
lda index
cmp #line_count
bne loop
MGTK_CALL MGTK::ShowCursor
rts
index: .byte 0
.endproc
;;; ============================================================
.assert * < font_buffer, error, "DA too big"