it works
This commit is contained in:
John Bintz
commit
026b6f6f0d
6
.gitignore
vendored
Normal file
6
.gitignore
vendored
Normal file
@ -0,0 +1,6 @@
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.vamosrc
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activate
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*.o
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*.lnk
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*.uaem
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.ccls-cache/
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240
blitter.s
Normal file
240
blitter.s
Normal file
@ -0,0 +1,240 @@
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XDEF _TakeOverSystem
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XDEF _GiveBackSystem
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XDEF _InitializeCopperlist
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XDEF _SetUpDisplay
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XDEF _AddDisplayToCopperlist
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XDEF _AddColorsToCopperlist
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XDEF _EndCopperlist
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XREF _custom
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FUNC_CNT SET -30
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FUNCDEF MACRO
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_LVO\1 EQU FUNC_CNT
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FUNC_CNT SET FUNC_CNT-6
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ENDM
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INCDIR "include_i_39:"
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INCDIR "extra_lvos_39:"
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INCLUDE "exec/exec_lib.i"
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INCLUDE "exec/types.i"
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INCLUDE "exec/libraries.i" # get the CALLLIB macro
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INCLUDE "graphics/gfxbase.i"
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INCLUDE "graphics_lvo.i"
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INCLUDE "hardware/custom.i"
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INCLUDE "hardware/dmabits.i"
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; @param 1 Pointer to numm terminated name of library
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; @param 2 Minimum version of library, 0 for any
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; @outreg D0 pointer to library in memory
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OpenLibrary MACRO
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MOVE.L 4,A6
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MOVEM.L A1,-(SP)
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MOVE.L \1,A1
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MOVE.L \2,D0
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CALLLIB _LVOOpenLibrary
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MOVEM.L (SP)+,A1
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ENDM
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PreserveRegister MACRO
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MOVE.L D0,-(SP)
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LEA _custom,A0
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MOVE.W \1r(A0),D0
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OR.W #$8000,D0
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MOVE.W D0,Old\1
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MOVE.L (SP)+,D0
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ENDM
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RestoreRegister MACRO
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MOVE.W #$7FFF,\1(A0)
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MOVE.W Old\1,\1(A0)
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ENDM
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STRUCTURE ScreenSetup,0
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UWORD ScreenSetup_width
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UWORD ScreenSetup_height
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UWORD ScreenSetup_bitplanes
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ULONG ScreenSetup_memoryStart
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LABEL ScreenSetup_SIZEOF
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BPLCON0_COLOR EQU $200
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_TakeOverSystem:
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MOVE.L A6,-(SP)
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OpenLibrary #GraphicsLibrary,#0
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MOVE.L D0,GraphicsBase
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MOVE.L D0,A6
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MOVE.L gb_ActiView(A6),OldView
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MOVE.L gb_copinit(A6),OldCopper
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LEA _custom,A0
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PreserveRegister dmacon
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PreserveRegister intena
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PreserveRegister intreq
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PreserveRegister adkcon
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; http://amigadev.elowar.com/read/ADCD_2.1/Hardware_Manual_guide/node0036.html
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MOVE.W #$C000,intena(A0) ; enable master interrupt
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MOVE.W #$3FFF,intena(A0) ; disable every other interrupt
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MOVE.W #DMAF_SETCLR|DMAF_COPPER|DMAF_RASTER|DMAF_BLITTER,dmacon(A0)
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MOVE.W #DMAF_AUDIO|DMAF_DISK|DMAF_SPRITE,dmacon(A0)
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MOVE.L #0,A1
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CALLLIB _LVOLoadView
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CALLLIB _LVOWaitTOF
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CALLLIB _LVOWaitTOF
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CALLLIB _LVOOwnBlitter
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CALLLIB _LVOWaitBlit
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MOVE.L $4,A6
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CALLLIB _LVOForbid
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MOVE.L (SP)+,A6
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RTS
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_GiveBackSystem:
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MOVE.L A6,-(SP)
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LEA _custom,A0
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RestoreRegister dmacon
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RestoreRegister intena
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RestoreRegister intreq
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RestoreRegister adkcon
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MOVE.L OldCopper,cop1lc(A0)
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MOVE.L GraphicsBase,A6
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MOVE.L OldView,A1
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CALLLIB _LVOLoadView
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CALLLIB _LVOWaitTOF
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CALLLIB _LVOWaitTOF
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CALLLIB _LVOWaitBlit
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CALLLIB _LVODisownBlitter
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MOVE.L $4,A6
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CALLLIB _LVOPermit
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MOVE.L (SP)+,A6
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RTS
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; @stack *copperlist Pointer to copperlist
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_InitializeCopperlist:
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MOVE.L 4(A7),A0
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MOVE.L #$FFFFFFFE,(A0)
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RTS
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; @stack *copperlist Pointer to copperlist
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; @stack ScreenSetup Pointer to screensetup struct
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_AddDisplayToCopperlist:
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MOVE.L 4(A7),A0 ; copperlist
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MOVE.L 8(A7),A1 ; struct
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; A2,D2,D3
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MOVEM.L A2/D2/D3,-(SP)
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MOVE.W ScreenSetup_bitplanes(A1),D0
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MOVE.L ScreenSetup_memoryStart(A1),A2
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; get bitplane offset
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MOVEQ #0,D2
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MOVE.W ScreenSetup_width(A1),D2
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ROR.W #3,D2
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MULU ScreenSetup_height(A1),D2
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SUBQ #1,D0
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.continue:
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; set up bplpt
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MOVEQ #0,D1
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MOVE.L D0,D1
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ROL.L #2,D1
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ADD.W #bplpt,D1
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; set up bitplane pointer
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MOVE.L D0,D3
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MULU D2,D3
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ADD.L A2,D3
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; low
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SWAP D3
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MOVE.W D1,(A0)+
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MOVE.W D3,(A0)+
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; high
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SWAP D3
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ADDQ #2,D1
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MOVE.W D1,(A0)+
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MOVE.W D3,(A0)+
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DBRA D0,.continue
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MOVE.L A0,D0
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MOVEM.L (SP)+,A2/D2/D3
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RTS
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; @stack *copperlist
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; @stack *colors
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; @stach count
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_AddColorsToCopperlist:
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MOVE.L 4(A7),A0 ; copperlist
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MOVE.L 8(A7),A1 ; colors
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MOVE.L 12(A7),D0 ; count
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MOVEM.L A2/D2,-(SP)
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LEA _custom,A2
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MOVE.L #color,D2
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ADD.L D2,A2
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SUBQ #1,D0
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.continue:
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MOVE.W (A1)+,(A2)+
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DBRA D0,.continue
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MOVE.L A2,D0
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MOVEM.L (SP)+,A2/D2
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RTS
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; @stack *copperlist
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_EndCopperlist:
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MOVE.L 4(A7),A0
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MOVE.W #$ffff,(A0)+
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MOVE.W #$fffe,(A0)+
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MOVE.L A0,D0
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RTS
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; @stack *ScreenSetup
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_SetUpDisplay:
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MOVE.L 4(A7),A0
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LEA _custom,A1
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MOVEQ #0,D0
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MOVE.W #BPLCON0_COLOR,D0
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MOVEQ #0,D1
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MOVE.W ScreenSetup_bitplanes(A0),D1
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AND.W #$7,D1
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ROL.W #8,D1
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ROL.W #4,D1
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ADD.W D1,D0
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MOVE.W D0,bplcon0(A1)
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MOVE.W #0,bplcon1(A1)
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MOVE.W #0,bpl1mod(A1)
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MOVE.W #$2c21,diwstrt(A1)
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MOVE.W #$2cc1,diwstop(A1)
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MOVE.W #$0038,ddfstrt(A1)
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MOVE.W #$00d0,ddfstop(A1)
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RTS
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CNOP 0,4
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OldView dc.l 0
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OldCopper dc.l 0
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GraphicsBase dc.l 0
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Olddmacon dc.w 0
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Oldintena dc.w 0
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Oldintreq dc.w 0
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Oldadkcon dc.w 0
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CNOP 0,4
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GraphicsLibrary GRAPHICSNAME
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291
main.c
Normal file
291
main.c
Normal file
@ -0,0 +1,291 @@
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#include <stdio.h>
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#include <clib/exec_protos.h>
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#include <clib/graphics_protos.h>
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#include <exec/exec.h>
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#include <hardware/custom.h>
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#include <hardware/dmabits.h>
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extern struct Custom far custom;
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struct ScreenSetup {
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short int width;
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short int height;
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short int bitplanes;
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unsigned char *memoryStart;
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};
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typedef UWORD color_t;
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extern void TakeOverSystem(void);
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extern void GiveBackSystem(void);
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extern void InitializeCopperlist(void *);
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extern void SetUpDisplay(struct ScreenSetup *);
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extern UWORD* AddDisplayToCopperlist(UWORD *copperlist, struct ScreenSetup *);
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extern UWORD* AddColorsToCopperlist(UWORD *copperlist, color_t[], int count);
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extern UWORD* EndCopperlist(UWORD *copperlist);
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#define SCREEN_WIDTH (320)
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#define SCREEN_HEIGHT (256)
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#define TOTAL_SCREEN_SETUP_SIZE(s) ((s->width / 8) * s->height * s->bitplanes)
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void AllocateScreenMemory(struct ScreenSetup *screenSetup) {
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char *memory = (char *)AllocMem(
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TOTAL_SCREEN_SETUP_SIZE(screenSetup),
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MEMF_CLEAR | MEMF_CHIP
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);
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screenSetup->memoryStart = memory;
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}
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void FreeScreenMemory(struct ScreenSetup *screenSetup) {
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FreeMem(
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screenSetup->memoryStart,
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TOTAL_SCREEN_SETUP_SIZE(screenSetup)
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);
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}
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#define COPPERLIST_SIZE (10000)
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UWORD * PrepareNewCopperlist(void) {
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UWORD *copperlist = AllocMem(
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COPPERLIST_SIZE,
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MEMF_CHIP | MEMF_CLEAR
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);
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InitializeCopperlist(copperlist);
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return copperlist;
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}
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void SetCopperlist(UWORD *copperlist) {
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custom.cop1lc = (ULONG)copperlist;
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}
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void FreeCopperlist(UWORD *copperlist) {
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FreeMem(copperlist, COPPERLIST_SIZE);
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}
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void WriteSomethingToScreen(struct ScreenSetup *screenSetup) {
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*(screenSetup->memoryStart) = 255;
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*(screenSetup->memoryStart + 8) = 0xAA;
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*(screenSetup->memoryStart + 16) = 0xF0;
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*(screenSetup->memoryStart + SCREEN_WIDTH * SCREEN_HEIGHT / 8 + 4) = 255;
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}
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void BlitFirstPlaneFirstRowToSecondRow(struct ScreenSetup *screenSetup) {
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unsigned char *source = screenSetup->memoryStart;
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unsigned char *target = (screenSetup->memoryStart + SCREEN_WIDTH * 2 / 8);
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// copy a to d
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// $09F0
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custom.bltcon0 = 0x09f0;
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custom.bltcon1 = 0;
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custom.bltapt = source;
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custom.bltdpt = target;
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custom.bltamod = 0;
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custom.bltdmod = 0;
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custom.bltafwm = 0xffff;
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custom.bltalwm = 0xffff;
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custom.bltsize = 0x0041;
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}
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void BlitShiftFirstPlaneFirstRowToThirdRow(struct ScreenSetup *screenSetup) {
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unsigned char *source = screenSetup->memoryStart;
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unsigned char *target = (screenSetup->memoryStart + SCREEN_WIDTH * 4 / 8);
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custom.bltcon0 = 0x49f0;
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custom.bltcon1 = 0;
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custom.bltapt = source;
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custom.bltdpt = target;
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custom.bltamod = 0;
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custom.bltdmod = 0;
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custom.bltafwm = 0xffff;
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custom.bltalwm = 0xffff;
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custom.bltsize = 0x0041;
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}
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void BlitWithMaskInBChannel(struct ScreenSetup *screenSetup) {
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unsigned char *source = screenSetup->memoryStart;
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unsigned char *target = (screenSetup->memoryStart + SCREEN_WIDTH * 6 / 8);
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unsigned char *mask = (screenSetup->memoryStart + 8);
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// a is source
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// b is mask
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// d is destination
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// so I want AB
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custom.bltcon0 = 0x0dc0;
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custom.bltcon1 = 0;
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custom.bltapt = mask;
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custom.bltbpt = source;
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custom.bltdpt = target;
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custom.bltamod = 0;
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custom.bltdmod = 0;
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custom.bltafwm = 0xffff;
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custom.bltalwm = 0xffff;
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custom.bltsize = 0x0041;
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}
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void BlitWithMaskInBDataInCChannel(struct ScreenSetup *screenSetup) {
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unsigned char *source = screenSetup->memoryStart;
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unsigned char *target = (screenSetup->memoryStart + SCREEN_WIDTH * 8 / 8);
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unsigned char *mask = (screenSetup->memoryStart + 8);
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unsigned char *background = (screenSetup->memoryStart + 16);
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// a is source
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// b is mask
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// c is background
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// d is destination
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// so I want AB+`AC
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custom.bltcon0 = 0x0fca;
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custom.bltcon1 = 0;
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custom.bltapt = mask;
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custom.bltbpt = source;
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custom.bltcpt = background;
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custom.bltdpt = target;
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custom.bltamod = 0;
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custom.bltbmod = 0;
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custom.bltcmod = SCREEN_WIDTH / 8;
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custom.bltdmod = SCREEN_WIDTH / 8;
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custom.bltafwm = 0xffff;
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custom.bltalwm = 0xffff;
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custom.bltsize = 0x0041;
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}
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||||
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void BlitDrawHorizontalLine(struct ScreenSetup *screenSetup) {
|
||||
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// i want to draw a line from 20,20 to 50,80
|
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// i need to get dx and dy
|
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// dx is 30, dy is 60
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// the shift value is 20 mod 15 = 5
|
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// a data register gets $8000
|
||||
// b data register gets $ffff
|
||||
// text shift is 0
|
||||
// c and d pointers get the word containing the first pixel, so
|
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// screenSetup->memoryStart + 320 * 20 / 8 + 2
|
||||
// module registers get width of bitplane in bytes
|
||||
// blit height is dx + 1 so 31
|
||||
// blit width = 2
|
||||
// logic is ab+'a, so 6, 7, 2, 3, 1, 0
|
||||
|
||||
char *target = screenSetup->memoryStart + (320 * 20 + 20) / 8;
|
||||
int dx = 10;
|
||||
int dy = 60;
|
||||
int tmp;
|
||||
|
||||
if (dx < dy) {
|
||||
tmp = dx;
|
||||
dx = dy;
|
||||
dy = tmp;
|
||||
}
|
||||
|
||||
custom.bltcon0 = (5 << 12) + (11 << 8) + 0xca;
|
||||
custom.bltcon1 = 1;
|
||||
custom.bltapt = 4 * dy - 2 * dx;
|
||||
custom.bltadat = 0x8000;
|
||||
custom.bltbdat = 0xffff;
|
||||
custom.bltcpt = target;
|
||||
custom.bltdpt = target;
|
||||
custom.bltamod = 4 * (dy - dx);
|
||||
custom.bltbmod = 4 * dy;
|
||||
custom.bltcmod = 320 / 8;
|
||||
custom.bltdmod = 320 / 8;
|
||||
custom.bltafwm = 0xffff;
|
||||
custom.bltalwm = 0xffff;
|
||||
custom.bltsize = 0x02 + (dx + 1 << 7);
|
||||
}
|
||||
|
||||
void BlitClearScreen(struct ScreenSetup *screenSetup, int color) {
|
||||
unsigned char *target = screenSetup->memoryStart;
|
||||
int i;
|
||||
|
||||
// a is source
|
||||
// b is mask
|
||||
// c is background
|
||||
// d is destination
|
||||
|
||||
// so I want AB+`AC
|
||||
|
||||
for (i = 0; i < screenSetup->bitplanes; ++i) {
|
||||
custom.bltcon0 = (0x01 << 8) + 0xf0;
|
||||
custom.bltcon1 = 0;
|
||||
custom.bltadat = color & 1 == 1 ? 0xffff : 0;
|
||||
custom.bltdpt = target + (320 * 256 / 8) * i;
|
||||
custom.bltamod = 0;
|
||||
custom.bltdmod = 0;
|
||||
custom.bltafwm = 0xffff;
|
||||
custom.bltalwm = 0xffff;
|
||||
custom.bltsize = (256 << 7) + (320 / 8);
|
||||
|
||||
color >>= 1;
|
||||
WaitBlit();
|
||||
}
|
||||
}
|
||||
|
||||
int main(void) {
|
||||
struct ScreenSetup screenSetup = { SCREEN_WIDTH, SCREEN_HEIGHT, 4, 0 };
|
||||
struct ScreenSetup *s = &screenSetup;
|
||||
UWORD *copperlist, *currentCopperlist;
|
||||
int i, result;
|
||||
color_t colors[16];
|
||||
|
||||
colors[0] = 0x0200;
|
||||
colors[1] = 0x0f00;
|
||||
colors[2] = 0x0f0f;
|
||||
colors[3] = 0x000f;
|
||||
|
||||
SetUpDisplay(&screenSetup);
|
||||
|
||||
AllocateScreenMemory(&screenSetup);
|
||||
WriteSomethingToScreen(&screenSetup);
|
||||
|
||||
// blitter copy the first bitplane row down to the second
|
||||
|
||||
copperlist = PrepareNewCopperlist();
|
||||
|
||||
TakeOverSystem();
|
||||
|
||||
/*
|
||||
BlitFirstPlaneFirstRowToSecondRow(&screenSetup);
|
||||
WaitBlit();
|
||||
BlitShiftFirstPlaneFirstRowToThirdRow(&screenSetup);
|
||||
WaitBlit();
|
||||
BlitWithMaskInBChannel(&screenSetup);
|
||||
WaitBlit();
|
||||
BlitWithMaskInBDataInCChannel(&screenSetup);
|
||||
WaitBlit();
|
||||
BlitDrawHorizontalLine(&screenSetup);
|
||||
WaitBlit();
|
||||
*/
|
||||
|
||||
BlitClearScreen(&screenSetup, 2);
|
||||
WaitBlit();
|
||||
|
||||
SetCopperlist(copperlist);
|
||||
|
||||
SetUpDisplay(&screenSetup);
|
||||
|
||||
currentCopperlist = AddDisplayToCopperlist(copperlist, &screenSetup);
|
||||
currentCopperlist = AddColorsToCopperlist(currentCopperlist, colors, 16);
|
||||
EndCopperlist(currentCopperlist);
|
||||
|
||||
for (i = 0; i < 100; ++i) {
|
||||
WaitTOF();
|
||||
}
|
||||
|
||||
GiveBackSystem();
|
||||
|
||||
FreeScreenMemory(&screenSetup);
|
||||
|
||||
FreeCopperlist(copperlist);
|
||||
|
||||
printf("Hello from C\n");
|
||||
|
||||
return 0;
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user