mirror of
https://github.com/lscharen/iigs-game-engine.git
synced 2024-11-22 11:34:14 +00:00
Rename tile blitters to match internal bit fields and add in the solid prioity blitter
This commit is contained in:
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55484fd3e4
commit
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@ -8,7 +8,7 @@
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use .\Defs.s
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; Feature flags
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NO_INTERRUPTS equ 1 ; turn off for crossrunner debugging
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NO_INTERRUPTS equ 0 ; turn off for crossrunner debugging
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NO_MUSIC equ 1 ; turn music + tool loading off
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; External data provided by the main program segment
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@ -394,7 +394,8 @@ ReadControl ENT
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; put blitter/Tiles00001.s
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; put blitter/Tiles00010.s
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; put blitter/Tiles00011.s
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put blitter/Tiles01000.s
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put blitter/Tiles10000.s
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put blitter/Tiles11000.s
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; put blitter/Tiles10001.s
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; put blitter/Tiles10010.s
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; put blitter/Tiles10011.s
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@ -182,7 +182,7 @@ TileProcs dw _TBSolidTile_00,_TBSolidTile_0H,_TBSolidTile_V0
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dw _TBSolidTile_00,_TBSolidTile_0H,_TBSolidTile_V0,_TBSolidTile_VH ; 10110 : fringed masked normal tiles w/sprite
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dw _TBSolidTile_00,_TBSolidTile_0H,_TBSolidTile_V0,_TBSolidTile_VH ; 10111 : fringed masked dynamic tiles w/sprite
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dw _TBSolidTile_00,_TBSolidTile_0H,_TBSolidTile_V0,_TBSolidTile_VH ; 11000 : high-priority normal tiles w/sprite
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dw _TBSolidPrioritySpriteTile_00,_TBSolidPrioritySpriteTile_0H,_TBSolidPrioritySpriteTile_V0,_TBSolidPrioritySpriteTile_VH ; 11000 : high-priority normal tiles w/sprite
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dw _TBSolidTile_00,_TBSolidTile_0H,_TBSolidTile_V0,_TBSolidTile_VH ; 11001 : high-priority dynamic tiles w/sprite
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dw _TBSolidTile_00,_TBSolidTile_0H,_TBSolidTile_V0,_TBSolidTile_VH ; 11010 : high-priority masked normal tiles w/sprite
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dw _TBSolidTile_00,_TBSolidTile_0H,_TBSolidTile_V0,_TBSolidTile_VH ; 11011 : high-priority masked dynamic tiles w/sprite
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@ -1,132 +1,6 @@
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; _TBSolidSpriteTile
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; _TBPriorityTile
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;
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; Renders solid tiles with sprites layered on top of the tile data. Because we need to combine
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; data from the sprite plane, tile data and write to the code field (which are all in different banks),
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; there is no way to do everything inline, so a composite tile is created on the fly and written to
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; a direct page buffer. This direct page buffer is then used to render the tile.
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_TBSolidSpriteTile_00
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; ldx #45*128
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jsr _TBCopyTileDataToCBuff ; Copy the tile into the compositing buffer (using correct x-register)
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jsr _TBApplySpriteData ; Overlay the data form the sprite plane (and copy into the code field)
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jmp _TBFillPEAOpcode ; Fill in the code field opcodes
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_TBSolidSpriteTile_0H
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jsr _TBCopyTileDataToCBuffH
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jsr _TBApplySpriteData
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jmp _TBFillPEAOpcode
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_TBSolidSpriteTile_V0
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jsr _TBCopyTileDataToCBuffV
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jsr _TBApplySpriteData
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jmp _TBFillPEAOpcode
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_TBSolidSpriteTile_VH
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jsr _TBCopyTileDataToCBuffVH
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jsr _TBApplySpriteData
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jmp _TBFillPEAOpcode
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; Fast variation that does not need to set the opcode
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_TBFastSpriteTile_00
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jsr _TBCopyTileDataToCBuff ; Copy the tile into the compositing buffer
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jmp _TBApplySpriteData ; Overlay the data form the sprite plane (and copy into the code field)
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_TBFastSpriteTile_0H
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jsr _TBCopyTileDataToCBuffH
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jmp _TBApplySpriteData
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_TBFastSpriteTile_V0
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jsr _TBCopyTileDataToCBuffV
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jmp _TBApplySpriteData
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_TBFastSpriteTile_VH
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jsr _TBCopyTileDataToCBuffVH
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jmp _TBApplySpriteData
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; Need to update the X-register before calling this
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_TBApplySpriteData
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ldx _SPR_X_REG ; set to the unaligned tile block address in the sprite plane
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]line equ 0
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lup 8
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lda blttmp+{]line*4}
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andl spritemask+{]line*SPRITE_PLANE_SPAN},x
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oral spritedata+{]line*SPRITE_PLANE_SPAN},x
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sta: $0004+{]line*$1000},y
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lda blttmp+{]line*4}+2
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andl spritemask+{]line*SPRITE_PLANE_SPAN}+2,x
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oral spritedata+{]line*SPRITE_PLANE_SPAN}+2,x
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sta: $0001+{]line*$1000},y
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]line equ ]line+1
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--^
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rts
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; Copy tile data into the direct page compositing buffer. The main reason to do this in full passes is
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; because we can avoid needing to use both the X and Y registers during the compositing process and
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; reserve Y to hold the code field address.
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;
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; Also, we can get away with not setting the bank register, this is a wash in terms of speed, but results
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; in simpler, more composable subroutines
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_TBCopyTileDataToCBuff
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]line equ 0
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lup 8
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ldal tiledata+{]line*4},x
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sta blttmp+{]line*4}
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ldal tiledata+{]line*4}+2,x
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sta blttmp+{]line*4}+2
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]line equ ]line+1
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--^
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rts
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_TBCopyTileDataToCBuffH
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]line equ 0
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lup 8
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ldal tiledata+{]line*4}+64,x
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sta blttmp+{]line*4}
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ldal tiledata+{]line*4}+64+2,x
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sta blttmp+{]line*4}+2
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]line equ ]line+1
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--^
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rts
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_TBCopyTileDataToCBuffV
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]src equ 7
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]dest equ 0
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lup 8
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ldal tiledata+{]src*4},x
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sta blttmp+{]dest*4}
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ldal tiledata+{]src*4}+2,x
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sta blttmp+{]dest*4}+2
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]src equ ]src-1
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]dest equ ]dest+1
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--^
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rts
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_TBCopyTileDataToCBuffVH
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]src equ 7
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]dest equ 0
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lup 8
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ldal tiledata+{]src*4}+64,x
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sta blttmp+{]dest*4}
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ldal tiledata+{]src*4}+64+2,x
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sta blttmp+{]dest*4}+2
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]src equ ]src-1
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]dest equ ]dest+1
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--^
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rts
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; Copy just the data into the code field from the composite buffer
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_TBSolidComposite
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]line equ 0
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lup 8
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lda blttmp+{]line*4}
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sta: $0004+{]line*$1000},y
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lda blttmp+{]line*4}+2
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sta: $0001+{]line*$1000},y
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]line equ ]line+1
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--^
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rts
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; The priority bit allows the tile to be rendered in front of sprites. If there's no sprite
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; in this tile area, then just fallback to the Tile00000.s implementation
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_TBPriorityTile dw _TBSolidTile_00,_TBSolidTile_0H,_TBSolidTile_V0,_TBSolidTile_VH
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dw _TBCopyData,_TBCopyDataH,_TBCopyDataV,_TBCopyDataVH
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@ -1,132 +1,19 @@
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; _TBMaskedSpriteTile
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; _TBMaskedPriorityTile
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;
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; Renders a composited tile with masking to the code field.
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_TBMaskedSpriteTile dw _TBMaskedSpriteTile_00
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dw _TBMaskedSpriteTile_0H
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dw _TBMaskedSpriteTile_V0
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dw _TBMaskedSpriteTile_VH
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; dw _TBCopyData,_TBCopyDataH,_TBCopyDataV,_TBCopyDataVH
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_TBMaskedSpriteTile_00
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jsr _TBCreateComposite
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jsr _TBSolidComposite
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jmp _TBFillPEAOpcode
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_TBMaskedSpriteTile_0H
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jsr _TBCreateCompositeH
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jsr _TBSolidComposite
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jmp _TBFillPEAOpcode
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_TBMaskedSpriteTile_V0
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jsr _TBCreateCompositeV
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jsr _TBSolidComposite
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jmp _TBFillPEAOpcode
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_TBMaskedSpriteTile_VH
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jsr _TBCreateCompositeVH
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jsr _TBSolidComposite
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jmp _TBFillPEAOpcode
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_TBCreateCompositeDataAndMask
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phb
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pea #^tiledata
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plb
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]line equ 0
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lup 8
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lda: tiledata+{]line*4},y
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andl spritemask+{]line*SPRITE_PLANE_SPAN},x
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oral spritedata+{]line*SPRITE_PLANE_SPAN},x
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sta blttmp+{]line*4}
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lda: tiledata+{]line*4}+32,y
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andl spritemask+{]line*SPRITE_PLANE_SPAN},x
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sta blttmp+{]line*4}+32
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lda: tiledata+{]line*4}+2,y
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andl spritemask+{]line*SPRITE_PLANE_SPAN}+2,x
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oral spritedata+{]line*SPRITE_PLANE_SPAN}+2,x
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sta blttmp+{]line*4}+2
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lda: tiledata+{]line*4}+32+2,y
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andl spritemask+{]line*SPRITE_PLANE_SPAN}+2,x
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sta blttmp+{]line*4}+32+2
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]line equ ]line+1
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--^
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plb
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plb
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rts
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_TBCreateCompositeH
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phb
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pea #^tiledata
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plb
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]line equ 0
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lup 8
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lda: tiledata+{]line*4}+64,y
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andl spritemask+{]line*SPRITE_PLANE_SPAN},x
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oral spritedata+{]line*SPRITE_PLANE_SPAN},x
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sta blttmp+{]line*4}
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lda: tiledata+{]line*4}+64+2,y
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andl spritemask+{]line*SPRITE_PLANE_SPAN}+2,x
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oral spritedata+{]line*SPRITE_PLANE_SPAN}+2,x
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sta blttmp+{]line*4}+2
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]line equ ]line+1
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--^
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plb
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plb
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rts
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_TBCreateCompositeV
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]src equ 7
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]dest equ 0
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lup 8
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lda: tiledata+{]src*4},y
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andl spritemask+{]dest*SPRITE_PLANE_SPAN},x
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oral spritedata+{]dest*SPRITE_PLANE_SPAN},x
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sta blttmp+{]dest*4}
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lda: tiledata+{]src*4}+2,y
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andl spritemask+{]dest*SPRITE_PLANE_SPAN}+2,x
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oral spritedata+{]dest*SPRITE_PLANE_SPAN}+2,x
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sta blttmp+{]dest*4}+2
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]src equ ]src-1
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]dest equ ]dest+1
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--^
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rts
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_TBCreateCompositeVH
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]src equ 7
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]dest equ 0
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lup 8
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lda: tiledata+{]src*4}+64,y
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andl spritemask+{]dest*SPRITE_PLANE_SPAN},x
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oral spritedata+{]dest*SPRITE_PLANE_SPAN},x
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sta blttmp+{]dest*4}
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lda: tiledata+{]src*4}+64+2,y
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andl spritemask+{]dest*SPRITE_PLANE_SPAN}+2,x
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oral spritedata+{]dest*SPRITE_PLANE_SPAN}+2,x
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sta blttmp+{]dest*4}+2
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]src equ ]src-1
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]dest equ ]dest+1
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--^
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rts
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; Copy just the data into the code field from the composite buffer
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_TBSolidComposite
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]line equ 0
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lup 8
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lda blttmp+{]line*4}
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sta: $0004+{]line*$1000},y
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lda blttmp+{]line*4}+2
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sta: $0001+{]line*$1000},y
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]line equ ]line+1
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--^
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rts
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; The priority bit allows the tile to be rendered in front of sprites. If there's no sprite
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; in this tile area, then just fallback to the Tile00000.s implementation
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_TBMaskedPriorityTile dw _TBMaskedTile_00,_TBMaskedTile_0H,_TBMaskedTile_V0,_TBMaskedTile_VH
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dw _TBCopyData,_TBCopyDataH,_TBCopyDataV,_TBCopyDataVH
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; NOTE: Eventually, we want a way to support this use-case
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;
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; When the high-priority bit is set for a tile, then the BG0 tile will be rendered behind the BG1 data. In
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; order to support this, the optional BG1 mask buffer needs to be enabled and *every* word in the tile
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; becomes a JMP handler (similar to masked dynamic tiles)
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;
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; The 8 bytes of code that is generated in the JMP handler is
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;
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; lda #tiledata
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; and [dp],y
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; ora (dp),y
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; nop
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@ -1,6 +1,187 @@
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; _TBPriorityTile
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; _TBSolidSpriteTile
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;
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; The priority bit allows the tile to be rendered in front of sprites. If there's no sprite
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; in this tile area, then just fallback to the Tile00000.s implementation
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_TBPriorityTile dw _TBSolidTile_00,_TBSolidTile_0H,_TBSolidTile_V0,_TBSolidTile_VH
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dw _TBCopyData,_TBCopyDataH,_TBCopyDataV,_TBCopyDataVH
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; Renders solid tiles with sprites layered on top of the tile data. Because we need to combine
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; data from the sprite plane, tile data and write to the code field (which are all in different banks),
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; there is no way to do everything inline, so a composite tile is created on the fly and written to
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; a direct page buffer. This direct page buffer is then used to render the tile.
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_TBSolidSpriteTile_00
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; ldx #45*128
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jsr _TBCopyTileDataToCBuff ; Copy the tile into the compositing buffer (using correct x-register)
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jsr _TBApplySpriteData ; Overlay the data form the sprite plane (and copy into the code field)
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jmp _TBFillPEAOpcode ; Fill in the code field opcodes
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_TBSolidSpriteTile_0H
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jsr _TBCopyTileDataToCBuffH
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jsr _TBApplySpriteData
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jmp _TBFillPEAOpcode
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_TBSolidSpriteTile_V0
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jsr _TBCopyTileDataToCBuffV
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jsr _TBApplySpriteData
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jmp _TBFillPEAOpcode
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_TBSolidSpriteTile_VH
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jsr _TBCopyTileDataToCBuffVH
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jsr _TBApplySpriteData
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jmp _TBFillPEAOpcode
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; Fast variation that does not need to set the opcode
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_TBFastSpriteTile_00
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jsr _TBCopyTileDataToCBuff ; Copy the tile into the compositing buffer
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jmp _TBApplySpriteData ; Overlay the data form the sprite plane (and copy into the code field)
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_TBFastSpriteTile_0H
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jsr _TBCopyTileDataToCBuffH
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jmp _TBApplySpriteData
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_TBFastSpriteTile_V0
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jsr _TBCopyTileDataToCBuffV
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jmp _TBApplySpriteData
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_TBFastSpriteTile_VH
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jsr _TBCopyTileDataToCBuffVH
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jmp _TBApplySpriteData
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; Need to update the X-register before calling this
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_TBApplySpriteData
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ldx _SPR_X_REG ; set to the unaligned tile block address in the sprite plane
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]line equ 0
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lup 8
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lda blttmp+{]line*4}
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andl spritemask+{]line*SPRITE_PLANE_SPAN},x
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oral spritedata+{]line*SPRITE_PLANE_SPAN},x
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sta: $0004+{]line*$1000},y
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lda blttmp+{]line*4}+2
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andl spritemask+{]line*SPRITE_PLANE_SPAN}+2,x
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oral spritedata+{]line*SPRITE_PLANE_SPAN}+2,x
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sta: $0001+{]line*$1000},y
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]line equ ]line+1
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--^
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rts
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; Copy tile data into the direct page compositing buffer. The main reason to do this in full passes is
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; because we can avoid needing to use both the X and Y registers during the compositing process and
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; reserve Y to hold the code field address.
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;
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; Also, we can get away with not setting the bank register, this is a wash in terms of speed, but results
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; in simpler, more composable subroutines
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_TBCopyTileDataToCBuff
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]line equ 0
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lup 8
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ldal tiledata+{]line*4},x
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sta blttmp+{]line*4}
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ldal tiledata+{]line*4}+2,x
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sta blttmp+{]line*4}+2
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]line equ ]line+1
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--^
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rts
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_TBCopyTileDataToCBuffH
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]line equ 0
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lup 8
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ldal tiledata+{]line*4}+64,x
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sta blttmp+{]line*4}
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ldal tiledata+{]line*4}+64+2,x
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sta blttmp+{]line*4}+2
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]line equ ]line+1
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--^
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rts
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_TBCopyTileDataToCBuffV
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]src equ 7
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]dest equ 0
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lup 8
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ldal tiledata+{]src*4},x
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sta blttmp+{]dest*4}
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ldal tiledata+{]src*4}+2,x
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sta blttmp+{]dest*4}+2
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]src equ ]src-1
|
||||
]dest equ ]dest+1
|
||||
--^
|
||||
rts
|
||||
|
||||
_TBCopyTileDataToCBuffVH
|
||||
]src equ 7
|
||||
]dest equ 0
|
||||
lup 8
|
||||
ldal tiledata+{]src*4}+64,x
|
||||
sta blttmp+{]dest*4}
|
||||
|
||||
ldal tiledata+{]src*4}+64+2,x
|
||||
sta blttmp+{]dest*4}+2
|
||||
]src equ ]src-1
|
||||
]dest equ ]dest+1
|
||||
--^
|
||||
rts
|
||||
|
||||
|
||||
; Copy tile mask data into the direct page compositing buffer.
|
||||
_TBCopyTileMaskToCBuff
|
||||
]line equ 0
|
||||
lup 8
|
||||
ldal tiledata+{]line*4}+32,x
|
||||
sta blttmp+{]line*4}+32
|
||||
|
||||
ldal tiledata+{]line*4}+32+2,x
|
||||
sta blttmp+{]line*4}+32+2
|
||||
]line equ ]line+1
|
||||
--^
|
||||
rts
|
||||
|
||||
_TBCopyTileMaskToCBuffH
|
||||
]line equ 0
|
||||
lup 8
|
||||
ldal tiledata+{]line*4}+32+64,x
|
||||
sta blttmp+{]line*4}+32
|
||||
|
||||
ldal tiledata+{]line*4}+32+64+2,x
|
||||
sta blttmp+{]line*4}+32+2
|
||||
]line equ ]line+1
|
||||
--^
|
||||
rts
|
||||
|
||||
_TBCopyTileMaskToCBuffV
|
||||
]src equ 7
|
||||
]dest equ 0
|
||||
lup 8
|
||||
ldal tiledata+{]src*4}+32,x
|
||||
sta blttmp+{]dest*4}+32
|
||||
|
||||
ldal tiledata+{]src*4}+32+2,x
|
||||
sta blttmp+{]dest*4}+32+2
|
||||
]src equ ]src-1
|
||||
]dest equ ]dest+1
|
||||
--^
|
||||
rts
|
||||
|
||||
_TBCopyTileMaskToCBuffVH
|
||||
]src equ 7
|
||||
]dest equ 0
|
||||
lup 8
|
||||
ldal tiledata+{]src*4}+32+64,x
|
||||
sta blttmp+{]dest*4}+32
|
||||
|
||||
ldal tiledata+{]src*4}+32+64+2,x
|
||||
sta blttmp+{]dest*4}+32+2
|
||||
]src equ ]src-1
|
||||
]dest equ ]dest+1
|
||||
--^
|
||||
rts
|
||||
|
||||
|
||||
; Copy just the data into the code field from the composite buffer
|
||||
_TBSolidComposite
|
||||
]line equ 0
|
||||
lup 8
|
||||
lda blttmp+{]line*4}
|
||||
sta: $0004+{]line*$1000},y
|
||||
lda blttmp+{]line*4}+2
|
||||
sta: $0001+{]line*$1000},y
|
||||
]line equ ]line+1
|
||||
--^
|
||||
rts
|
||||
|
@ -1,19 +1,132 @@
|
||||
; _TBMaskedPriorityTile
|
||||
; _TBMaskedSpriteTile
|
||||
;
|
||||
; The priority bit allows the tile to be rendered in front of sprites. If there's no sprite
|
||||
; in this tile area, then just fallback to the Tile00000.s implementation
|
||||
_TBMaskedPriorityTile dw _TBMaskedTile_00,_TBMaskedTile_0H,_TBMaskedTile_V0,_TBMaskedTile_VH
|
||||
dw _TBCopyData,_TBCopyDataH,_TBCopyDataV,_TBCopyDataVH
|
||||
; Renders a composited tile with masking to the code field.
|
||||
_TBMaskedSpriteTile dw _TBMaskedSpriteTile_00
|
||||
dw _TBMaskedSpriteTile_0H
|
||||
dw _TBMaskedSpriteTile_V0
|
||||
dw _TBMaskedSpriteTile_VH
|
||||
; dw _TBCopyData,_TBCopyDataH,_TBCopyDataV,_TBCopyDataVH
|
||||
|
||||
_TBMaskedSpriteTile_00
|
||||
jsr _TBCreateComposite
|
||||
jsr _TBSolidComposite
|
||||
jmp _TBFillPEAOpcode
|
||||
|
||||
_TBMaskedSpriteTile_0H
|
||||
jsr _TBCreateCompositeH
|
||||
jsr _TBSolidComposite
|
||||
jmp _TBFillPEAOpcode
|
||||
|
||||
_TBMaskedSpriteTile_V0
|
||||
jsr _TBCreateCompositeV
|
||||
jsr _TBSolidComposite
|
||||
jmp _TBFillPEAOpcode
|
||||
|
||||
_TBMaskedSpriteTile_VH
|
||||
jsr _TBCreateCompositeVH
|
||||
jsr _TBSolidComposite
|
||||
jmp _TBFillPEAOpcode
|
||||
|
||||
_TBCreateCompositeDataAndMask
|
||||
phb
|
||||
pea #^tiledata
|
||||
plb
|
||||
|
||||
]line equ 0
|
||||
lup 8
|
||||
lda: tiledata+{]line*4},y
|
||||
andl spritemask+{]line*SPRITE_PLANE_SPAN},x
|
||||
oral spritedata+{]line*SPRITE_PLANE_SPAN},x
|
||||
sta blttmp+{]line*4}
|
||||
|
||||
lda: tiledata+{]line*4}+32,y
|
||||
andl spritemask+{]line*SPRITE_PLANE_SPAN},x
|
||||
sta blttmp+{]line*4}+32
|
||||
|
||||
lda: tiledata+{]line*4}+2,y
|
||||
andl spritemask+{]line*SPRITE_PLANE_SPAN}+2,x
|
||||
oral spritedata+{]line*SPRITE_PLANE_SPAN}+2,x
|
||||
sta blttmp+{]line*4}+2
|
||||
|
||||
lda: tiledata+{]line*4}+32+2,y
|
||||
andl spritemask+{]line*SPRITE_PLANE_SPAN}+2,x
|
||||
sta blttmp+{]line*4}+32+2
|
||||
]line equ ]line+1
|
||||
--^
|
||||
|
||||
plb
|
||||
plb
|
||||
rts
|
||||
|
||||
_TBCreateCompositeH
|
||||
phb
|
||||
pea #^tiledata
|
||||
plb
|
||||
|
||||
]line equ 0
|
||||
lup 8
|
||||
lda: tiledata+{]line*4}+64,y
|
||||
andl spritemask+{]line*SPRITE_PLANE_SPAN},x
|
||||
oral spritedata+{]line*SPRITE_PLANE_SPAN},x
|
||||
sta blttmp+{]line*4}
|
||||
|
||||
lda: tiledata+{]line*4}+64+2,y
|
||||
andl spritemask+{]line*SPRITE_PLANE_SPAN}+2,x
|
||||
oral spritedata+{]line*SPRITE_PLANE_SPAN}+2,x
|
||||
sta blttmp+{]line*4}+2
|
||||
]line equ ]line+1
|
||||
--^
|
||||
|
||||
plb
|
||||
plb
|
||||
rts
|
||||
|
||||
|
||||
_TBCreateCompositeV
|
||||
]src equ 7
|
||||
]dest equ 0
|
||||
lup 8
|
||||
lda: tiledata+{]src*4},y
|
||||
andl spritemask+{]dest*SPRITE_PLANE_SPAN},x
|
||||
oral spritedata+{]dest*SPRITE_PLANE_SPAN},x
|
||||
sta blttmp+{]dest*4}
|
||||
|
||||
lda: tiledata+{]src*4}+2,y
|
||||
andl spritemask+{]dest*SPRITE_PLANE_SPAN}+2,x
|
||||
oral spritedata+{]dest*SPRITE_PLANE_SPAN}+2,x
|
||||
sta blttmp+{]dest*4}+2
|
||||
]src equ ]src-1
|
||||
]dest equ ]dest+1
|
||||
--^
|
||||
rts
|
||||
|
||||
_TBCreateCompositeVH
|
||||
]src equ 7
|
||||
]dest equ 0
|
||||
lup 8
|
||||
lda: tiledata+{]src*4}+64,y
|
||||
andl spritemask+{]dest*SPRITE_PLANE_SPAN},x
|
||||
oral spritedata+{]dest*SPRITE_PLANE_SPAN},x
|
||||
sta blttmp+{]dest*4}
|
||||
|
||||
lda: tiledata+{]src*4}+64+2,y
|
||||
andl spritemask+{]dest*SPRITE_PLANE_SPAN}+2,x
|
||||
oral spritedata+{]dest*SPRITE_PLANE_SPAN}+2,x
|
||||
sta blttmp+{]dest*4}+2
|
||||
]src equ ]src-1
|
||||
]dest equ ]dest+1
|
||||
--^
|
||||
rts
|
||||
|
||||
; Copy just the data into the code field from the composite buffer
|
||||
_TBSolidComposite
|
||||
]line equ 0
|
||||
lup 8
|
||||
lda blttmp+{]line*4}
|
||||
sta: $0004+{]line*$1000},y
|
||||
lda blttmp+{]line*4}+2
|
||||
sta: $0001+{]line*$1000},y
|
||||
]line equ ]line+1
|
||||
--^
|
||||
rts
|
||||
|
||||
; NOTE: Eventually, we want a way to support this use-case
|
||||
;
|
||||
; When the high-priority bit is set for a tile, then the BG0 tile will be rendered behind the BG1 data. In
|
||||
; order to support this, the optional BG1 mask buffer needs to be enabled and *every* word in the tile
|
||||
; becomes a JMP handler (similar to masked dynamic tiles)
|
||||
;
|
||||
; The 8 bytes of code that is generated in the JMP handler is
|
||||
;
|
||||
; lda #tiledata
|
||||
; and [dp],y
|
||||
; ora (dp),y
|
||||
; nop
|
||||
|
@ -1,6 +0,0 @@
|
||||
; _TBPriorityDynamicMaskTile
|
||||
;
|
||||
; The priority bit allows the tile to be rendered in front of sprites. If there's no sprite
|
||||
; in this tile area, then just fallback to the Tile00000.s implementation
|
||||
_TBPriorityDynamicMaskTile dw _TBDynamicMaskTile_00,_TBDynamicMaskTile_00,_TBDynamicMaskTile_00,_TBDynamicMaskTile_00
|
||||
dw _TBDynamicTile_00,_TBDynamicTile_00,_TBDynamicTile_00,_TBDynamicTile_00
|
@ -1,7 +1,31 @@
|
||||
; _TBPrioritySpriteTile
|
||||
; _TBSolidPrioritySpriteTile
|
||||
;
|
||||
; When the sprite is composited with the tile data, the tile mask is used to place the tile data on top of
|
||||
; any sprite data
|
||||
_TBSolidPrioritySpriteTile_00
|
||||
; ldx #45*128
|
||||
jsr _TBCopyTileDataToCBuff ; Copy the tile data into the compositing buffer (using correct x-register)
|
||||
jsr _TBCopyTileMaskToCBuff ; Copy the tile mask into the compositing buffer (using correct x-register)
|
||||
jsr _TBApplyPrioritySpriteData ; Underlay the data fromthe sprite plane (and copy into the code field)
|
||||
jmp _TBFillPEAOpcode ; Fill in the code field opcodes
|
||||
|
||||
_TBSolidPrioritySpriteTile_0H
|
||||
jsr _TBCopyTileDataToCBuffH
|
||||
jsr _TBCopyTileMaskToCBuffH
|
||||
jsr _TBApplyPrioritySpriteData
|
||||
jmp _TBFillPEAOpcode
|
||||
|
||||
_TBSolidPrioritySpriteTile_V0
|
||||
jsr _TBCopyTileDataToCBuffV
|
||||
jsr _TBCopyTileMaskToCBuffV
|
||||
jsr _TBApplyPrioritySpriteData
|
||||
jmp _TBFillPEAOpcode
|
||||
|
||||
_TBSolidPrioritySpriteTile_VH
|
||||
jsr _TBCopyTileDataToCBuffVH
|
||||
jsr _TBCopyTileMaskToCBuffVH
|
||||
jsr _TBApplyPrioritySpriteData
|
||||
jmp _TBFillPEAOpcode
|
||||
|
||||
; Need to update the X-register before calling this
|
||||
_TBApplyPrioritySpriteData
|
||||
|
Loading…
Reference in New Issue
Block a user