mirror of https://github.com/a2-4am/4cade.git
199 lines
7.1 KiB
Plaintext
199 lines
7.1 KiB
Plaintext
;license:MIT
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;(c) 2018-9 by 4am
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;
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; HGR title and action slideshows
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;
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; Public functions
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; - HGRTitleSlideshow
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; - HGRActionSlideshow
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; - HGRSingle
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;
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;------------------------------------------------------------------------------
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; HGRTitleSlideshow
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; execute a slideshow of hi-res title screenshots
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;
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; in: none
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; out: everything clobbered
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; graphics mode still displaying hi-res screen with last picture visible
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;------------------------------------------------------------------------------
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HGRTitleSlideshow
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jsr LoadHGRTransition ; load transition effect code at $6000
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jsr okvs_iter ; cycle through all listed HGR files
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!word gSlideshowStore
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!word HGRTitleCallback ; address of callback (called on each file)
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rts ; exit with last picture still visible
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;------------------------------------------------------------------------------
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; HGRActionSlideshow
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; execute a slideshow of hi-res action screenshots
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;
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; in: none
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; out: everything clobbered
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; graphics mode still displaying hi-res screen with last picture visible
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;------------------------------------------------------------------------------
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HGRActionSlideshow
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jsr LoadHGRTransition ; load transition effect code at $6000
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jsr okvs_iter ; cycle through all listed HGR files
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!word gSlideshowStore
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!word HGRActionCallback ; address of callback (called on each file)
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rts ; exit with last picture still visible
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;------------------------------------------------------------------------------
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; HGRSingle
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; display a single hi-res screenshot, with transition effect
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;
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; in: none
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; out: everything clobbered
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; graphics mode still displaying hi-res screen with last picture visible
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;------------------------------------------------------------------------------
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HGRSingle
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+STAY @fname
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jsr LoadFile ; load HGR screenshot at $4000
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!word kRootDirectory
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@fname !word $FDFD ; SMC
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!word $4000
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jsr LoadHGRTransition ; load transition effect code at $6000
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jmp ExecuteTransitionAt6000AndWait
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;------------------------------------------------------------------------------
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; LoadHGRTransition [private]
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; looks up name of next HGR transition effect in FX.CONF and loads that file
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; at $6000
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; in: gGlobalPrefsStore has been initialized
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; out: all registers and flags clobbered
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; $6000..$BFFF contains transition effect code
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;------------------------------------------------------------------------------
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LoadHGRTransition
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jsr LoadFile ; load HGR transition effects list into $8000
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!word kRootDirectory
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!word kFXConfFile
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- !word $8000
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jsr ParseKeyValueList ; parse HGR transition effects list into $6000
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!word gFXStore
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!word -
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!byte 0
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jsr pref_get ; get HGR transition effect from prefs
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!word kNextFX
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!word gFXStore
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+STAY ++ ; A/Y = filename (don't load file yet)
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; X = index of the transition in FX store
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+LDADDR gFXStore
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jsr okvs_next ; get transition after this one
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+STAY +
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jsr pref_set ; update prefs store and save to disk
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!word kNextFX
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+ !word $FDFD ; SMC
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jsr LoadFile ; now load transition effect code into $6000
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!word kFXDirectory
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++ !word $FDFD ; SMC
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!word $6000
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HGRRTS rts
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;------------------------------------------------------------------------------
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; HGRTitleCallback [private]
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; callback called by okvs_iter on gSlideshowStore
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; to load and display a single HGR title screenshot
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; in: A/Y contains address of filename (name only, path is always /TITLE.HGR/)
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; X contains 0-based index of the current record in gSlideshowStore
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; out: all registers and flags clobbered
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; $0800..$1EFF preserved (this contains the gSlideshowStore OKVS data)
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; $2000..$BFFF clobbered by graphics data and transition code
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;------------------------------------------------------------------------------
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HGRTitleCallback
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bit KBD
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bmi HGRRTS
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+STAY +
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jsr GetGameInfo
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; if game is not found (C will be set here), it means it can't be played on
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; this machine due to memory or joystick requirements, so we don't display
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; it in slideshows
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bcs HGRRTS
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stx gGameToLaunch
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jsr LoadFile ; load HGR screenshot at $4000
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!word kHGRTitleDirectory
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+ !word $FDFD ; SMC
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!word $4000
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jmp ExecuteTransitionAt6000AndWait
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;------------------------------------------------------------------------------
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; HGRActionCallback [private]
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; callback called by okvs_iter on gSlideshowStore
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; to load and display a single HGR action screenshot
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; in: A/Y contains address of filename (name only, path is always /ACTION.HGR/)
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; X contains 0-based index of the current record in gSlideshowStore
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; gGamesListStore must be initialized
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; out: all registers and flags clobbered
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; $0800..$1EFF preserved (this contains the gSlideshowStore OKVS data)
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; $2000..$BFFF clobbered by graphics data and transition code
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;------------------------------------------------------------------------------
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HGRActionCallback
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bit KBD
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bmi HGRRTS
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+STAY +
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jsr GetGameInfoInActionSlideshow
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; if game name is not found (C will be set here), it means the game
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; can't be played due to memory or joystick requirements, so we hide
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; it from slideshows
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bcs HGRRTS
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; found the game
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+STAY SAVE ; (SAVE) -> game title
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stx gGameToLaunch
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jsr LoadFile ; load HGR screenshot at $4000
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!word kHGRActionDirectory
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+ !word $FDFD ; SMC
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!word $4000
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; display game name in the bottom-left corner
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lda #22
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sta VTAB
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lda #0 ; solid horizontal bar character
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jsr @resetline
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lda (SAVE),y ; (SAVE) -> game title, Y = 0, so A = title length
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clc
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adc #$03
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sta gPathname
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lda #7 ; top-right rounded corner character
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jsr @drawline
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inc VTAB
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lda #" "
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jsr @resetline
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lda (SAVE),y ; A = title length
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tay
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- lda (SAVE),y
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sta gPathname+1,y
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dey
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bne -
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lda #3 ; solid vertical bar character
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jsr @drawline
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jmp ExecuteTransitionAt6000AndWait
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@resetline
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ldy #40
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- sta gPathname,y
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dey
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bne -
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sty HTAB
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rts
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@drawline
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ldy gPathname
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sta gPathname,y
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+LDADDR gPathname
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sec
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; /!\ execution falls through to glue.font/DrawString
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