mirror of
https://github.com/a2-4am/4cade.git
synced 2024-12-28 03:29:59 +00:00
113 lines
4.1 KiB
Plaintext
113 lines
4.1 KiB
Plaintext
;license:MIT
|
|
;(c) 2018-2020 by 4am
|
|
;
|
|
; GR action slideshows
|
|
;
|
|
; Public functions
|
|
; - GRActionSlideshow
|
|
; - GRSingle
|
|
;
|
|
|
|
;------------------------------------------------------------------------------
|
|
; GRActionSlideshow
|
|
; display a slideshow of lo-res action screenshots
|
|
;
|
|
; in: none
|
|
; out: everything clobbered
|
|
; graphics mode set to display hi-res screen
|
|
;------------------------------------------------------------------------------
|
|
GRActionSlideshow
|
|
jsr LoadGRTransition ; load transition effect code at $6000
|
|
jsr BlankGR ; switch GR mode with initial blank screen
|
|
jsr okvs_iter ; cycle through all listed GR files
|
|
!word gSlideshowStore
|
|
!word GRActionCallback ; address of callback (called on each file)
|
|
jmp BlankHGR ; switch back to HGR mode with initial blank screen on exit
|
|
|
|
;------------------------------------------------------------------------------
|
|
; GRSingle
|
|
; display a single lo-res screenshot, with transition effect
|
|
;
|
|
; in: none
|
|
; out: everything clobbered
|
|
; graphics mode set to display hi-res screen
|
|
;------------------------------------------------------------------------------
|
|
GRSingle
|
|
+ST16 @fname
|
|
jsr BlankGR ; switch to GR mode with initial blank screen
|
|
jsr LoadFile ; load GR screenshot into $6000
|
|
!word kRootDirectory
|
|
@fname !word $FDFD ; SMC
|
|
!word $6000
|
|
jsr LoadGRTransition ; load transition effect code at $6400
|
|
jsr ExecuteTransitionAt6400AndWait
|
|
jmp BlankHGR ; switch back to HGR mode with initial blank screen on exit
|
|
|
|
;------------------------------------------------------------------------------
|
|
; BlankGR [private]
|
|
; clear and show GR page 1 without flickering
|
|
;
|
|
; in: none
|
|
; out: text page clobbered
|
|
; graphics mode set to display lo-res screen
|
|
;------------------------------------------------------------------------------
|
|
BlankGR
|
|
ldy #$2C ; BIT
|
|
sty PageFrom
|
|
ldx #$04
|
|
stx PageTo+2
|
|
lda #0
|
|
jsr ClearGR
|
|
bit PAGE1
|
|
bit $C056 ; set GR mode
|
|
jmp GRMode
|
|
|
|
;------------------------------------------------------------------------------
|
|
; LoadGRTransition [private]
|
|
;
|
|
; in: none
|
|
; out: all registers and flags clobbered
|
|
; $6400..$BFFF/main contains transition effect code (probably not all
|
|
; of that, but no promises)
|
|
;------------------------------------------------------------------------------
|
|
LoadGRTransition
|
|
jsr LoadFile
|
|
!word kFXDirectory
|
|
!word kGRFizzleFile
|
|
!word $6400
|
|
GRRTS rts
|
|
|
|
;------------------------------------------------------------------------------
|
|
; GRActionCallback [private]
|
|
; callback called by okvs_iter on gSlideshowStore
|
|
; to load and display a single GR action screenshot
|
|
|
|
; in: A/Y contains address of filename (name only, path is always /ACTION.GR/)
|
|
; $WINDEX contains 0-based index of the current record in gSlideshowStore (word)
|
|
; gGamesListStore must be initialized
|
|
; out: all registers and flags clobbered
|
|
; $0800..$1EFF preserved (this contains the gSlideshowStore OKVS data)
|
|
; $2000..$BFFF clobbered by graphics data and transition code
|
|
;------------------------------------------------------------------------------
|
|
GRActionCallback
|
|
bit KBD
|
|
bmi GRRTS
|
|
|
|
+ST16 +
|
|
|
|
jsr FindGameInActionSlideshow
|
|
; if game name is not found (C will be set here), it means the game
|
|
; can't be played due to memory or joystick requirements, so we hide
|
|
; it from slideshows
|
|
bcs GRRTS
|
|
|
|
+LD16 WINDEX ; save game index in case user hits RETURN
|
|
+ST16 gGameToLaunch ; while it's visible (we'll launch it)
|
|
|
|
jsr LoadFile ; load GR screenshot into $6000
|
|
!word kGRActionDirectory
|
|
+ !word $FDFD ; SMC
|
|
!word $6000
|
|
|
|
jmp ExecuteTransitionAt6400AndWait
|