mirror of
https://frontier.innolan.net/github/AmigaExamples.git
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144 lines
3.2 KiB
ArmAsm
144 lines
3.2 KiB
ArmAsm
include "includes.i"
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xdef ShowSplash
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xdef ReloadSplashScreen
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xdef RestoreSplashMenuSection
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xdef splash
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xdef splashInvalid
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xdef versionText
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SPLASH_COLOR_DEPTH equ 5
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SPLASH_SCREEN_WIDTH_BYTES equ 40
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RestoreSplashMenuSection:
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move.l backgroundOffscreen,a0
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lea splash,a2
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add.l #(134*40*5)+((320-96)/16),a2
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WaitBlitter
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move.w #(BC0F_SRCA|BC0F_DEST|$f0),BLTCON0(A6)
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move.w #0,BLTCON1(a6)
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move.l #$ffffffff,BLTAFWM(a6) ;no masking of first/last word
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move.w #0,BLTAMOD(a6) ;A modulo
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move.w #(320-96)/8,BLTDMOD(a6) ;D modulo
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move.l a0,BLTAPTH(a6) ;source graphic top left corner
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move.l a2,BLTDPTH(a6) ;destination top left corner
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move.w #((112*5)<<6)|(96/16),BLTSIZE(a6)
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rts
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ReloadSplashScreen:
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cmp.w #0,splashInvalid
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beq .skip
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move.w #0,splashInvalid
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move.l #endDiskSplash-diskSplash,d0
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move.l #splash,a0
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move.l #diskSplash,a1
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jsr LoadDiskData
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lea splash,a0
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add.l #(134*40*5)+((320-96)/16),a0
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WaitBlitter
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move.w #(BC0F_SRCA|BC0F_DEST|$f0),BLTCON0(A6)
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move.w #0,BLTCON1(a6)
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move.l #$ffffffff,BLTAFWM(a6) ;no masking of first/last word
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move.w #(320-96)/8,BLTAMOD(a6) ;A modulo
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move.w #0,BLTDMOD(a6) ;D modulo
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move.l a0,BLTAPTH(a6) ;source graphic top left corner
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move.l backgroundOffscreen,BLTDPTH(a6) ;destination top left corner
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move.w #((112*5)<<6)|(96/16),BLTSIZE(a6)
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.skip:
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rts
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ShowSplash:
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lea CUSTOM,a6
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;; set up playfield
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move.w #(RASTER_Y_START<<8)|RASTER_X_START,DIWSTRT(a6)
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move.w #((RASTER_Y_STOP-256)<<8)|(RASTER_X_STOP-256),DIWSTOP(a6)
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move.w #(RASTER_X_START/2-SCREEN_RES),DDFSTRT(a6)
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move.w #(RASTER_X_START/2-SCREEN_RES)+(8*((SCREEN_WIDTH/16)-1)),DDFSTOP(a6)
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move.w #(SPLASH_COLOR_DEPTH<<12)|$200,BPLCON0(a6)
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move.w #SPLASH_SCREEN_WIDTH_BYTES*SPLASH_COLOR_DEPTH-SPLASH_SCREEN_WIDTH_BYTES,BPL1MOD(a6)
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move.w #SPLASH_SCREEN_WIDTH_BYTES*SPLASH_COLOR_DEPTH-SPLASH_SCREEN_WIDTH_BYTES,BPL2MOD(a6)
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bsr ReloadSplashScreen
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;; poke bitplane pointers
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lea splash,a1
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lea splashCopperListBplPtr(pc),a2
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moveq #SPLASH_COLOR_DEPTH-1,d0
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.bitplaneloop:
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move.l a1,d1
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move.w d1,2(a2)
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swap d1
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move.w d1,6(a2)
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lea SPLASH_SCREEN_WIDTH_BYTES(a1),a1 ; bit plane data is interleaved
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addq #8,a2
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dbra d0,.bitplaneloop
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;; install copper list, then enable dma
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lea splashCopperList(pc),a0
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move.l a0,COP1LC(a6)
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jsr WaitVerticalBlank
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;; set up default palette
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include "out/splash-palette.s"
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lea COLOR31(a6),a0
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move.w #$f00,(a0)
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jsr WaitVerticalBlank
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move.w #(DMAF_BLITTER|DMAF_SETCLR!DMAF_COPPER!DMAF_RASTER!DMAF_MASTER),DMACON(a6)
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move.w #(INTF_SETCLR|INTF_VERTB|INTF_INTEN),INTENA(a6)
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RenderVersion
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.wait:
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jsr WaitVerticalBlank
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jsr WaitForJoystick
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rts
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splashCopperList:
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splashCopperListBplPtr:
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dc.w BPL1PTL,0
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dc.w BPL1PTH,0
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dc.w BPL2PTL,0
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dc.w BPL2PTH,0
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dc.w BPL3PTL,0
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dc.w BPL3PTH,0
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dc.w BPL4PTL,0
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dc.w BPL4PTH,0
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dc.w BPL5PTL,0
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dc.w BPL5PTH,0
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dc.w BPL6PTL,0
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dc.w BPL6PTH,0
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dc.w $ffdf,$fffe
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dc.w $22df,$fffe
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dc.w COLOR31,$ddd
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dc.w $26df,$fffe
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dc.w COLOR31,$ccc
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dc.l $fffffffe
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splashInvalid:
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dc.w 1
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align 4
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versionText:
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dc.b "TEST VERSION 1"
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dc.b 0
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align 4
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section .bss
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splash:
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ds.b endDiskSplash-diskSplash
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cnop 0,1024
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section .noload
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diskSplash:
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incbin "out/splash.bin"
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endDiskSplash:
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cnop 0,512
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