a2d/desk.acc/show.image.file.s

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.setcpu "65C02"
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.include "apple2.inc"
.include "../inc/apple2.inc"
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.include "../inc/prodos.inc"
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.include "../mgtk.inc"
.include "../desktop.inc" ; get selection, font
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.include "../macros.inc"
.org $800
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start: jmp copy2aux
save_stack:.byte 0
;;; Copy $800 through $13FF (the DA) to aux
.proc copy2aux
tsx
stx save_stack
sta RAMWRTON
ldy #0
src: lda start,y ; self-modified
dst: sta start,y ; self-modified
dey
bne src
sta RAMWRTOFF
inc src+2
inc dst+2
sta RAMWRTON
lda dst+2
cmp #$14
bne src
.endproc
call_main_trampoline := $20 ; installed on ZP, turns off auxmem and calls...
call_main_addr := call_main_trampoline+7 ; address patched in here
;;; Copy the following "call_main_template" routine to $20
.scope
sta RAMWRTON
sta RAMRDON
ldx #sizeof_routine
loop: lda routine,x
sta call_main_trampoline,x
dex
bpl loop
jmp call_init
.endscope
.proc routine
sta RAMRDOFF
sta RAMWRTOFF
jsr $1000 ; overwritten (in zp version)
sta RAMRDON
sta RAMWRTON
rts
.endproc
sizeof_routine := * - routine ; can't .sizeof(proc) before declaration
;; https://github.com/cc65/cc
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.proc call_init
;; run the DA
jsr init
;; tear down/exit
sta ALTZPON
lda LCBANK1
lda LCBANK1
sta RAMRDOFF
sta RAMWRTOFF
ldx save_stack
txs
rts
.endproc
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;;; ============================================================
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;;; ProDOS MLI calls
.proc open_file
jsr copy_params_aux_to_main
sta ALTZPOFF
MLI_CALL OPEN, open_params
sta ALTZPON
jsr copy_params_main_to_aux
rts
.endproc
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.proc get_file_eof
jsr copy_params_aux_to_main
sta ALTZPOFF
MLI_CALL GET_EOF, get_eof_params
sta ALTZPON
jsr copy_params_main_to_aux
rts
.endproc
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.proc read_file
jsr copy_params_aux_to_main
sta ALTZPOFF
MLI_CALL READ, read_params
sta ALTZPON
jsr copy_params_main_to_aux
rts
.endproc
.proc close_file
jsr copy_params_aux_to_main
sta ALTZPOFF
MLI_CALL CLOSE, close_params
sta ALTZPON
jsr copy_params_main_to_aux
rts
.endproc
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;;; ============================================================
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;;; Copies param blocks from Aux to Main
.proc copy_params_aux_to_main
ldy #(params_end - params_start + 1)
sta RAMWRTOFF
loop: lda params_start - 1,y
sta params_start - 1,y
dey
bne loop
sta RAMRDOFF
rts
.endproc
;;; Copies param blocks from Main to Aux
.proc copy_params_main_to_aux
pha
php
sta RAMWRTON
ldy #(params_end - params_start + 1)
loop: lda params_start - 1,y
sta params_start - 1,y
dey
bne loop
sta RAMRDON
plp
pla
rts
.endproc
;;; ----------------------------------------
params_start:
;;; This block gets copied between main/aux
;;; ProDOS MLI param blocks
hires := $2000
hires_size := $2000
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DEFINE_OPEN_PARAMS open_params, pathbuff, $C00
DEFINE_GET_EOF_PARAMS get_eof_params
DEFINE_READ_PARAMS read_params, hires, hires_size
DEFINE_CLOSE_PARAMS close_params
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.proc pathbuff ; 1st byte is length, rest is full path
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length: .byte $00
data: .res 64, 0
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.endproc
params_end:
;;; ----------------------------------------
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da_window_id := 100
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.proc line_pos
left: .word 0
base: .word 0
.endproc
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.proc event_params ; queried to track mouse-up
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kind: .byte $00
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;;; if state is MGTK::event_kind_key_down
key := *
modifiers := *+1
;;; otherwise
xcoord := *
ycoord := *+2
.res 4 ; space for both
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.endproc
default_width := 560
default_height := 192
default_left := 0
default_top := 0
.proc window_title
.byte 0 ; length
.endproc
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.proc winfo
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window_id: .byte da_window_id ; window identifier
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options: .byte MGTK::option_dialog_box
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title: .addr window_title
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hscroll:.byte MGTK::scroll_option_none
vscroll:.byte MGTK::scroll_option_none
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hthumbmax: .byte 32
hthumbpos: .byte 0
vthumbmax: .byte 32
vthumbpos: .byte 0
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status: .byte 0
reserved: .byte 0
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mincontwidth: .word default_width
mincontlength: .word default_height
maxcontwidth: .word default_width
maxcontlength: .word default_height
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.proc port
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viewloc: DEFINE_POINT default_left, default_top
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mapbits: .addr MGTK::screen_mapbits
mapwidth: .word MGTK::screen_mapwidth
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maprect: DEFINE_RECT 0, 0, default_width, default_height
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.endproc
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pattern:.res 8, 0
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colormasks: .byte MGTK::colormask_and, MGTK::colormask_or
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penloc: DEFINE_POINT 0, 0
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penwidth: .byte 1
penheight: .byte 1
penmode: .byte 0
textback: .byte $7F
textfont: .addr DEFAULT_FONT
nextwinfo: .addr 0
.endproc
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.proc init
sta ALTZPON
lda LCBANK1
lda LCBANK1
;; Get filename by checking DeskTop selected window/icon
;; Check that an icon is selected
lda #0
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sta pathbuff::length
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lda selected_file_count
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beq abort ; some file properties?
lda path_index ; prefix index in table
bne :+
abort: rts
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;; Copy path (prefix) into pathbuff buffer.
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: src := $06
dst := $08
asl a ; (since address table is 2 bytes wide)
tax
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copy16 path_table,x, src
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ldy #0
lda (src),y
tax
inc src
bne :+
inc src+1
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: copy16 #(pathbuff::data), dst
jsr copy_pathbuff ; copy x bytes (src) to (dst)
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;; Append separator.
lda #'/'
ldy #0
sta (dst),y
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inc pathbuff::length
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inc dst
bne :+
inc dst+1
;; Get file entry.
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: lda selected_file_list ; file index in table
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asl a ; (since table is 2 bytes wide)
tax
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copy16 file_table,x, src
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;; Exit if a directory.
ldy #2 ; 2nd byte of entry
lda (src),y
and #$70 ; check that one of bits 4,5,6 is set ???
;; some vague patterns, but unclear
;; basic = $32,$33, text = $52, sys = $11,$14,??, bin = $23,$24,$33
;; dir = $01 (so not shown)
bne :+
rts ; abort ???
;; Append filename to path.
: ldy #9
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
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: jsr copy_pathbuff ; copy x bytes (src) to (dst)
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jmp open_file_and_init_window
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.proc copy_pathbuff ; copy x bytes from src to dst
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ldy #0 ; incrementing path length and dst
loop: lda (src),y
sta (dst),y
iny
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inc pathbuff::length
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dex
bne loop
tya
clc
adc dst
sta dst
bcc end
inc dst+1
end: rts
.endproc
.endproc
.proc open_file_and_init_window
jsr open_file
lda open_params::ref_num
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sta get_eof_params::ref_num
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sta read_params::ref_num
sta close_params::ref_num
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MGTK_CALL MGTK::HideCursor
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jsr stash_menu
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MGTK_CALL MGTK::OpenWindow, winfo
MGTK_CALL MGTK::SetPort, winfo::port
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jsr show_file
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MGTK_CALL MGTK::ShowCursor
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MGTK_CALL MGTK::FlushEvents
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MGTK_CALL MGTK::ObscureCursor
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;; fall through
.endproc
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;;; ============================================================
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;;; Main Input Loop
.proc input_loop
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MGTK_CALL MGTK::GetEvent, event_params
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lda event_params::kind
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cmp #MGTK::event_kind_button_down ; was clicked?
beq exit
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cmp #MGTK::event_kind_key_down ; any key?
beq on_key
bne input_loop
on_key:
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lda event_params::modifiers
bne input_loop
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lda event_params::key
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cmp #CHAR_ESCAPE
beq exit
bne input_loop
exit:
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MGTK_CALL MGTK::HideCursor
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MGTK_CALL MGTK::CloseWindow, winfo
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DESKTOP_CALL DT_REDRAW_ICONS
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jsr unstash_menu
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MGTK_CALL MGTK::ShowCursor
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rts ; exits input loop
.endproc
.proc show_file
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jsr get_file_eof
;; If bigger than $2000, assume DHR
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lda get_eof_params::eof ; fancy 3-byte unsigned compare
cmp #<(hires_size+1)
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lda get_eof_params::eof+1
sbc #>(hires_size+1)
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lda get_eof_params::eof+2
sbc #^(hires_size+1)
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bcs dhr
jsr show_hr_file
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jmp close
dhr: jsr show_dhr_file
close: jsr close_file
rts
.endproc
.proc show_hr_file
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sta PAGE2OFF
jsr read_file
jsr close_file
jsr hr_to_dhr
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rts
.endproc
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.proc show_dhr_file
;; AUX memory half
sta PAGE2ON
jsr read_file
;; MAIN memory half
sta PAGE2OFF
jsr read_file
;; TODO: Restore PAGE2 state?
rts
.endproc
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;;; ============================================================
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;;; Convert single hires to double hires
;;; Assumes the image is loaded to MAIN $2000 and
;;; relies on the hr_to_dhr.inc table.
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.proc hr_to_dhr
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ptr := $06
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rows := 192
cols := 40
spill := $08 ; spill-over
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lda #0 ; row
rloop: pha
tax
lda hires_table_lo,x
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sta ptr
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lda hires_table_hi,x
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sta ptr+1
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ldy #cols-1 ; col
lda #0
sta spill ; spill-over
cloop: lda (ptr),y
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tax
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bmi hibitset
;; complex case - need to spill in bit from prev col and store
lda hr_to_dhr_aux,x
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sta PAGE2ON
sta (ptr),y
lda hr_to_dhr_main,x
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ora spill ; apply previous spill bit (to bit 6)
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sta PAGE2OFF
sta (ptr),y
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ror ; move high bit to bit 6
and #(1 << 6)
sta spill
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jmp next
hibitset:
;; simple case - no bit spillage
lda hr_to_dhr_aux,x
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sta PAGE2ON
sta (ptr),y
lda hr_to_dhr_main,x
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sta PAGE2OFF
sta (ptr),y
lda #0 ; no spill bit
sta spill
next:
dey
bpl cloop
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pla
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inc
cmp #rows
bne rloop
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;; TODO: Restore PAGE2 state?
done: sta PAGE2OFF
rts
.endproc
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;;; ============================================================
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;;; Stash/Unstash Menu Bar
;;; Have not yet figured out how to force the menu to
;;; redraw, so instead we save the top 13 rows of the
;;; screen to a scratch buffer and restore after
;;; destroying the window.
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stash := $1200 ; Past DA code
rows = 13
cols = 40
.proc stash_menu
src := $08
dst := $06
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copy16 #stash, dst
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sta PAGE2ON
jsr inner
sta PAGE2OFF
inner:
lda #0 ; row #
rloop: pha
tax
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lda hires_table_lo,x
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sta src
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lda hires_table_hi,x
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sta src+1
ldy #cols-1
cloop: lda (src),y
sta (dst),y
dey
bpl cloop
clc ; src += cols
lda src
adc #<cols
sta src
lda src+1
adc #>cols
sta src+1
clc ; dst += cols
lda dst
adc #<cols
sta dst
lda dst+1
adc #>cols
sta dst+1
pla
inc
cmp #rows
bcc rloop
rts
.endproc
.proc unstash_menu
src := $08
dst := $06
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copy16 #stash, src
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sta PAGE2ON
jsr inner
sta PAGE2OFF
inner:
lda #0 ; row #
rloop: pha
tax
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lda hires_table_lo,x
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sta dst
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lda hires_table_hi,x
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sta dst+1
ldy #cols-1
cloop: lda (src),y
sta (dst),y
dey
bpl cloop
clc ; src += cols
lda src
adc #<cols
sta src
lda src+1
adc #>cols
sta src+1
clc ; dst += cols
lda dst
adc #<cols
sta dst
lda dst+1
adc #>cols
sta dst+1
pla
inc
cmp #rows
bcc rloop
rts
.endproc
.include "inc/hires_table.inc"
.include "inc/hr_to_dhr.inc"