Add TwoLayer rendering stubs
This commit is contained in:
Lucas Scharenbroich
parent
280d19876c
commit
3292572261
14
src/Tiles.s
14
src/Tiles.s
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@ -393,10 +393,16 @@ DynUnder dw CopyDynamicTile,DynamicUnder,OneSpriteDynamicUnder
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; To improve the performance when two-layer rendering is enabled,
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; the TILE_SOLID_BIT hint bit can be set to indicate that a tile
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; has no transparency. This allows one of the faster routines
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; to be selected.
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; to be selected from the other Proc tables
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TwoLyrProcs
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TwoLyrOverZA dw Tile0TwoLyr,SpriteOver0TwoLyr,OneSpriteOver0TwoLyr
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TwoLyrOverZV dw Tile0TwoLyr,SpriteOver0TwoLyr,OneSpriteOver0TwoLyr
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TwoLyrOverNA dw CopyTileATwoLyr,SpriteOverATwoLyr,OneSpriteTwoLyrOverA
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TwoLyrOverNV dw CopyTileVTwoLyr,SpriteOverVTwoLyr,OneSpriteTwoLyrOverV
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TwoLyrUnderZA dw Tile0TwoLyr,SpriteOver0TwoLyr,OneSpriteOver0TwoLyr ; if sprites are over or under the transparent tile, same rendering code
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TwoLyrUnderZV dw Tile0TwoLyr,SpriteOver0TwoLyr,OneSpriteOver0TwoLyr
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TwoLyrUnderNA dw CopyTileATwoLyr,SpriteUnderATwoLyr,OneSpriteTwoLyrUnderA
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TwoLyrUnderNV dw CopyTileVTwoLyr,SpriteUnderVTwoLyr,OneSpriteTwoLyrUnderV
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; SetBG0XPos
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;
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@ -387,6 +387,7 @@ _TSCopyTileToDynamic
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put render/Fast.s
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put render/Slow.s
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put render/Dynamic.s
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put render/TwoLayer.s
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put render/Sprite1.s
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put render/Sprite2.s
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put tiles/DirtyTileQueue.s
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@ -4,16 +4,16 @@ CopyDynamicTile
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and #$007F
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ora #$4800
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]line equ 0 ; render the first column
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]line equ 0 ; render the first column
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lup 8
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sta: $0004+{]line*$1000},y
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]line equ ]line+1
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--^
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inc ; advance to the next word
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inc ; advance to the next word
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inc
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]line equ 0 ; render the second column
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]line equ 0 ; render the second column
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lup 8
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sta: $0001+{]line*$1000},y
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]line equ ]line+1
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@ -48,10 +48,10 @@ DynamicOver
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sta _JTBL_CACHE
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lda TileStore+TS_TILE_ID,x ; Get the original tile descriptor
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and #$007F ; clamp to < (32 * 4)
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and #$007F ; clamp to < (32 * 4)
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ora #$B500
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xba
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sta _OP_CACHE ; This is the 2-byte opcode for to load the data
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sta _OP_CACHE ; This is the 2-byte opcode for to load the data
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lda TileStore+TS_CODE_ADDR_HIGH,x
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pha
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@ -69,12 +69,12 @@ DynamicOver
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sec
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lda _JTBL_CACHE
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sbc #SNIPPET_SIZE ; Advance to the next snippet (Reverse indexing)
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sbc #SNIPPET_SIZE ; Advance to the next snippet (Reverse indexing)
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sta _JTBL_CACHE
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clc
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lda _OP_CACHE
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adc #$0200 ; Advance to the next word
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adc #$0200 ; Advance to the next word
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sta _OP_CACHE
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CopyDynOver 2;$0000
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@ -94,10 +94,10 @@ DynamicUnder
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sta _JTBL_CACHE
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lda TileStore+TS_TILE_ID,x ; Get the original tile descriptor
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and #$007F ; clamp to < (32 * 4)
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ora #$3580 ; Pre-calc the AND $80,x opcode + operand
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and #$007F ; clamp to < (32 * 4)
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ora #$3580 ; Pre-calc the AND $80,x opcode + operand
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xba
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sta _OP_CACHE ; This is the 2-byte opcode for to load the data
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sta _OP_CACHE ; This is the 2-byte opcode for to load the data
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lda TileStore+TS_CODE_ADDR_HIGH,x
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pha
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@ -120,7 +120,7 @@ DynamicUnder
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clc
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lda _OP_CACHE
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adc #$0200 ; Advance to the next word
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adc #$0200 ; Advance to the next word
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sta _OP_CACHE
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CopyDynUnder 2;$0000
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@ -133,25 +133,25 @@ DynamicUnder
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CopyDynUnder 30;$7000
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; Now fill in the JMP opcodes
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sep #$20
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lda #$4C
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sep #$20
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lda #$4C
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sta: $0000,y
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sta: $0003,y
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sta $1000,y
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sta $1003,y
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sta $2000,y
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sta $2003,y
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sta $3000,y
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sta $3003,y
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sta $4000,y
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sta $4003,y
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sta $5000,y
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sta $5003,y
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sta $6000,y
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sta $6003,y
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sta $7000,y
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sta $7003,y
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rep #$20
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sta $1000,y
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sta $1003,y
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sta $2000,y
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sta $2003,y
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sta $3000,y
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sta $3003,y
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sta $4000,y
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sta $4003,y
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sta $5000,y
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sta $5003,y
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sta $6000,y
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sta $6003,y
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sta $7000,y
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sta $7003,y
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rep #$20
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plb
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rts
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@ -164,52 +164,52 @@ DynamicUnder
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;
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; ]1 : sprite buffer offset
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; ]2 : code field offset
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CopyDynOver mac
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lda tmp_sprite_mask+{]1} ; load the mask value
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bne mixed ; a non-zero value may be mixed
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CopyDynOver mac
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lda tmp_sprite_mask+{]1} ; load the mask value
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bne mixed ; a non-zero value may be mixed
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; This is a solid word
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lda #$00F4 ; PEA instruction
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sta: ]2,y
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lda tmp_sprite_data+{]1} ; load the sprite data
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sta: ]2+1,y ; PEA operand
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bra next
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lda #$00F4 ; PEA instruction
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sta: ]2,y
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lda tmp_sprite_data+{]1} ; load the sprite data
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sta: ]2+1,y ; PEA operand
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bra next
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mixed cmp #$FFFF ; All 1's in the mask is a fully transparent sprite word
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beq transparent
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mixed cmp #$FFFF ; All 1's in the mask is a fully transparent sprite word
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beq transparent
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lda #$004C ; JMP to handler
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sta: {]2},y
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lda _JTBL_CACHE ; Get the offset to the exception handler for this column
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ora #{]2&$7000} ; adjust for the current row offset
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sta: {]2}+1,y
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tax ; This becomes the new address that we use to patch in
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lda #$004C ; JMP to handler
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sta: {]2},y
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lda _JTBL_CACHE ; Get the offset to the exception handler for this column
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ora #{]2&$7000} ; adjust for the current row offset
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sta: {]2}+1,y
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tax ; This becomes the new address that we use to patch in
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lda _OP_CACHE ; Get the LDA dp,x instruction for this column
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sta: $0000,x
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lda _OP_CACHE ; Get the LDA dp,x instruction for this column
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sta: $0000,x
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lda #$0029 ; AND #SPRITE_MASK
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sta: $0002,x
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lda tmp_sprite_mask+{]1}
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sta: $0003,x
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lda #$0029 ; AND #SPRITE_MASK
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sta: $0002,x
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lda tmp_sprite_mask+{]1}
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sta: $0003,x
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lda #$0009 ; ORA #SPRITE_DATA
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sta: $0005,x
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lda tmp_sprite_data+{]1}
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sta: $0006,x
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lda #$0009 ; ORA #SPRITE_DATA
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sta: $0005,x
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lda tmp_sprite_data+{]1}
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sta: $0006,x
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lda #$0D80 ; branch to the prologue (BRA *+15)
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sta: $0008,x
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bra next
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lda #$0D80 ; branch to the prologue (BRA *+15)
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sta: $0008,x
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bra next
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; This is a transparent word, so just show the dynamic data
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transparent
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lda #$4800 ; Put the PHA in the third byte
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sta: {]2}+1,y
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lda _OP_CACHE ; Store the LDA dp,x instruction with operand
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sta: {]2},y
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lda #$4800 ; Put the PHA in the third byte
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sta: {]2}+1,y
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lda _OP_CACHE ; Store the LDA dp,x instruction with operand
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sta: {]2},y
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next
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<<<
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<<<
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; Masked renderer for a dynamic tile on top of the sprite data. There are no transparent vs
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; solid vs mixed considerations here. This only sets the JMP address, setting the JMP opcodes
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@ -227,24 +227,24 @@ CopyDynUnder MAC
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; ora $00,x
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; bra *+16
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lda _JTBL_CACHE ; Get the offset to the exception handler for this column
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ora #{]2&$7000} ; adjust for the current row offset
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sta: {]2}+1,y
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tax ; This becomes the new address that we use to patch in
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lda _JTBL_CACHE ; Get the offset to the exception handler for this column
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ora #{]2&$7000} ; adjust for the current row offset
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sta: {]2}+1,y
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tax ; This becomes the new address that we use to patch in
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lda #$00A9 ; LDA #DATA
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sta: $0000,x
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lda tmp_sprite_data+{]1}
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sta: $0001,x
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lda #$00A9 ; LDA #DATA
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sta: $0000,x
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lda tmp_sprite_data+{]1}
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sta: $0001,x
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lda _OP_CACHE
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sta: $0003,x ; AND $80,x
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eor #$8020 ; Switch the opcode to an ORA and remove the high bit of the operand
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sta: $0005,x ; ORA $00,x
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lda _OP_CACHE
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sta: $0003,x ; AND $80,x
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eor #$8020 ; Switch the opcode to an ORA and remove the high bit of the operand
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sta: $0005,x ; ORA $00,x
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lda #$0E80 ; branch to the prologue (BRA *+16)
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sta: $0007,x
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eom
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lda #$0E80 ; branch to the prologue (BRA *+16)
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sta: $0007,x
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eom
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; Helper functions to move tile data into the dynamic tile space
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@ -253,59 +253,59 @@ CopyDynUnder MAC
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; Y = dynamic tile ID
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CopyTileToDyn
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txa
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jsr _GetTileAddr
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jsr _GetTileAddr
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tax
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tya
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and #$001F ; Maximum of 32 dynamic tiles
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and #$001F ; Maximum of 32 dynamic tiles
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asl
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asl ; 4 bytes per page
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adc BlitterDP ; Add to the bank 00 base address
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adc #$0100 ; Go to the next page
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asl ; 4 bytes per page
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adc BlitterDP ; Add to the bank 00 base address
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adc #$0100 ; Go to the next page
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tay
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jsr CopyTileDToDyn ; Copy the tile data
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jmp CopyTileMToDyn ; Copy the tile mask
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jsr CopyTileDToDyn ; Copy the tile data
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jmp CopyTileMToDyn ; Copy the tile mask
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; X = address of tile
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; Y = tile address in bank 0
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CopyTileDToDyn
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phb
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pea $0000
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pea $0000
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plb
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plb
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ldal tiledata+0,x
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sta: $0000,y
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ldal tiledata+2,x
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sta: $0002,y
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ldal tiledata+4,x
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sta $0100,y
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ldal tiledata+6,x
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sta $0102,y
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ldal tiledata+8,x
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sta $0200,y
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ldal tiledata+10,x
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sta $0202,y
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ldal tiledata+12,x
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sta $0300,y
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ldal tiledata+14,x
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sta $0302,y
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ldal tiledata+16,x
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sta $0400,y
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ldal tiledata+18,x
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sta $0402,y
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ldal tiledata+20,x
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sta $0500,y
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ldal tiledata+22,x
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sta $0502,y
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ldal tiledata+24,x
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sta $0600,y
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ldal tiledata+26,x
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sta $0602,y
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ldal tiledata+28,x
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sta $0700,y
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ldal tiledata+30,x
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sta $0702,y
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ldal tiledata+0,x
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sta: $0000,y
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ldal tiledata+2,x
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sta: $0002,y
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ldal tiledata+4,x
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sta $0100,y
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ldal tiledata+6,x
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sta $0102,y
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ldal tiledata+8,x
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sta $0200,y
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ldal tiledata+10,x
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sta $0202,y
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ldal tiledata+12,x
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sta $0300,y
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ldal tiledata+14,x
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sta $0302,y
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ldal tiledata+16,x
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sta $0400,y
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ldal tiledata+18,x
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sta $0402,y
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ldal tiledata+20,x
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sta $0500,y
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ldal tiledata+22,x
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sta $0502,y
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ldal tiledata+24,x
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sta $0600,y
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ldal tiledata+26,x
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sta $0602,y
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ldal tiledata+28,x
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sta $0700,y
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ldal tiledata+30,x
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sta $0702,y
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plb
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rts
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@ -324,42 +324,42 @@ CopyTileDToDyn
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; jsr CopyTileMToDyn
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CopyTileMToDyn
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phb
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pea $0000
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pea $0000
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plb
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plb
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ldal tiledata+32+0,x
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sta: $0080,y
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ldal tiledata+32+2,x
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sta: $0082,y
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ldal tiledata+32+4,x
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sta $0180,y
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ldal tiledata+32+6,x
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sta $0182,y
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ldal tiledata+32+8,x
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sta $0280,y
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ldal tiledata+32+10,x
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sta $0282,y
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ldal tiledata+32+12,x
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sta $0380,y
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ldal tiledata+32+14,x
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sta $0382,y
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ldal tiledata+32+16,x
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sta $0480,y
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ldal tiledata+32+18,x
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sta $0482,y
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ldal tiledata+32+20,x
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sta $0580,y
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ldal tiledata+32+22,x
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sta $0582,y
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ldal tiledata+32+24,x
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sta $0680,y
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ldal tiledata+32+26,x
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sta $0682,y
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ldal tiledata+32+28,x
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sta $0780,y
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ldal tiledata+32+30,x
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sta $0782,y
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ldal tiledata+32+0,x
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sta: $0080,y
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ldal tiledata+32+2,x
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sta: $0082,y
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ldal tiledata+32+4,x
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sta $0180,y
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ldal tiledata+32+6,x
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sta $0182,y
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ldal tiledata+32+8,x
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sta $0280,y
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ldal tiledata+32+10,x
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sta $0282,y
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ldal tiledata+32+12,x
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sta $0380,y
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ldal tiledata+32+14,x
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sta $0382,y
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ldal tiledata+32+16,x
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sta $0480,y
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ldal tiledata+32+18,x
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sta $0482,y
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ldal tiledata+32+20,x
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sta $0580,y
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ldal tiledata+32+22,x
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sta $0582,y
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ldal tiledata+32+24,x
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sta $0680,y
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ldal tiledata+32+26,x
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sta $0682,y
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ldal tiledata+32+28,x
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sta $0780,y
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ldal tiledata+32+30,x
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sta $0782,y
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plb
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rts
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@ -188,3 +188,56 @@ OneSpriteDynamicOver
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tyx
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jmp DynamicOver
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;-------------------------------
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; Two Layer tiles with one sprite. Just copy the data and go through the generic sprite path
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_CopySpriteDataAndMaskToDP
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]line equ 0
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lup 8
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ldal spritedata+{]line*SPRITE_PLANE_SPAN},x
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sta tmp_sprite_data+{]line*4}
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ldal spritedata+{]line*SPRITE_PLANE_SPAN}+2,x
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sta tmp_sprite_data+{]line*4}+2
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ldal spritemask+{]line*SPRITE_PLANE_SPAN},x
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sta tmp_sprite_mask+{]line*4}
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ldal spritemask+{]line*SPRITE_PLANE_SPAN}+2,x
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||||
sta tmp_sprite_mask+{]line*4}+2
|
||||
]line equ ]line+1
|
||||
--^
|
||||
rts
|
||||
|
||||
OneSpriteOver0TwoLyr
|
||||
txy
|
||||
tax
|
||||
jsr _CopySpriteDataAndMaskToDP
|
||||
tyx
|
||||
jmp SpriteOver0TwoLyr
|
||||
|
||||
OneSpriteTwoLyrOverA
|
||||
txy
|
||||
tax
|
||||
jsr _CopySpriteDataAndMaskToDP
|
||||
tyx
|
||||
jmp SpriteOverATwoLyr
|
||||
|
||||
OneSpriteTwoLyrOverV
|
||||
txy
|
||||
tax
|
||||
jsr _CopySpriteDataAndMaskToDP
|
||||
tyx
|
||||
jmp SpriteOverVTwoLyr
|
||||
|
||||
OneSpriteTwoLyrUnderA
|
||||
txy
|
||||
tax
|
||||
jsr _CopySpriteDataAndMaskToDP
|
||||
tyx
|
||||
jmp SpriteUnderATwoLyr
|
||||
|
||||
OneSpriteTwoLyrUnderV
|
||||
txy
|
||||
tax
|
||||
jsr _CopySpriteDataAndMaskToDP
|
||||
tyx
|
||||
jmp SpriteUnderVTwoLyr
|
||||
|
|
|
|||
|
|
@ -0,0 +1,382 @@
|
|||
; Collection of render function used when the engine is in "Two Layer" mode. Other than the Tile 0
|
||||
; routines, there's nothing in here that is particularly well optimized.
|
||||
|
||||
Tile0TwoLyr
|
||||
and #$00FF
|
||||
ora #$4800
|
||||
sta: $0004,y
|
||||
sta $1004,y
|
||||
sta $2004,y
|
||||
sta $3004,y
|
||||
sta $4004,y
|
||||
sta $5004,y
|
||||
sta $6004,y
|
||||
sta $7004,y
|
||||
inc
|
||||
inc
|
||||
sta: $0001,y
|
||||
sta $1001,y
|
||||
sta $2001,y
|
||||
sta $3001,y
|
||||
sta $4001,y
|
||||
sta $5001,y
|
||||
sta $6001,y
|
||||
sta $7001,y
|
||||
|
||||
sep #$20
|
||||
lda #$B1 ; This is a special case where we can set all the words to LDA (DP),y
|
||||
sta: $0000,y
|
||||
sta: $0003,y
|
||||
sta $1000,y
|
||||
sta $1003,y
|
||||
sta $2000,y
|
||||
sta $2003,y
|
||||
sta $3000,y
|
||||
sta $3003,y
|
||||
sta $4000,y
|
||||
sta $4003,y
|
||||
sta $5000,y
|
||||
sta $5003,y
|
||||
sta $6000,y
|
||||
sta $6003,y
|
||||
sta $7000,y
|
||||
sta $7003,y
|
||||
rep #$20
|
||||
rts
|
||||
|
||||
; Draw from the sprite buffer into a fully transparent tile
|
||||
SpriteOver0TwoLyr
|
||||
|
||||
lda TileStore+TS_JMP_ADDR,x ; Get the address of the exception handler
|
||||
sta _JTBL_CACHE
|
||||
|
||||
lda TileStore+TS_WORD_OFFSET,x ; Load the word offset of this tile (0 to 82 in steps of 2)
|
||||
ora #$B100 ; Pre-calc the LDA (dp),y opcode + operand
|
||||
xba
|
||||
sta _OP_CACHE
|
||||
|
||||
lda TileStore+TS_CODE_ADDR_HIGH,x
|
||||
pha
|
||||
ldy TileStore+TS_CODE_ADDR_LOW,x
|
||||
plb
|
||||
|
||||
CopyTwoLayerOver tmp_sprite_data+0;$0003
|
||||
CopyTwoLayerOver tmp_sprite_data+4;$1003
|
||||
CopyTwoLayerOver tmp_sprite_data+8;$2003
|
||||
CopyTwoLayerOver tmp_sprite_data+12;$3003
|
||||
CopyTwoLayerOver tmp_sprite_data+16;$4003
|
||||
CopyTwoLayerOver tmp_sprite_data+20;$5003
|
||||
CopyTwoLayerOver tmp_sprite_data+24;$6003
|
||||
CopyTwoLayerOver tmp_sprite_data+28;$7003
|
||||
|
||||
sec
|
||||
lda _JTBL_CACHE
|
||||
sbc #SNIPPET_SIZE ; Advance to the next snippet (Reverse indexing)
|
||||
sta _JTBL_CACHE
|
||||
|
||||
clc
|
||||
lda _OP_CACHE
|
||||
adc #$0200 ; Advance to the next word
|
||||
sta _OP_CACHE
|
||||
|
||||
CopyTwoLayerOver tmp_sprite_data+2;$0000
|
||||
CopyTwoLayerOver tmp_sprite_data+6;$1000
|
||||
CopyTwoLayerOver tmp_sprite_data+10;$2000
|
||||
CopyTwoLayerOver tmp_sprite_data+14;$3000
|
||||
CopyTwoLayerOver tmp_sprite_data+18;$4000
|
||||
CopyTwoLayerOver tmp_sprite_data+22;$5000
|
||||
CopyTwoLayerOver tmp_sprite_data+26;$6000
|
||||
CopyTwoLayerOver tmp_sprite_data+30;$7000
|
||||
|
||||
plb
|
||||
rts
|
||||
|
||||
TmpTileDataToCodeField
|
||||
lda TileStore+TS_JMP_ADDR,x ; Get the address of the exception handler
|
||||
sta _JTBL_CACHE
|
||||
|
||||
lda TileStore+TS_WORD_OFFSET,x ; Load the word offset of this tile (0 to 82 in steps of 2)
|
||||
ora #$B100 ; Pre-calc the LDA (dp),y opcode + operand
|
||||
xba
|
||||
sta _OP_CACHE
|
||||
|
||||
lda TileStore+TS_CODE_ADDR_HIGH,x
|
||||
pha
|
||||
ldy TileStore+TS_CODE_ADDR_LOW,x
|
||||
plb
|
||||
|
||||
_TmpTileDataToCodeField
|
||||
|
||||
CopyTwoLayerOver tmp_tile_data+0;$0003
|
||||
CopyTwoLayerOver tmp_tile_data+4;$1003
|
||||
CopyTwoLayerOver tmp_tile_data+8;$2003
|
||||
CopyTwoLayerOver tmp_tile_data+12;$3003
|
||||
CopyTwoLayerOver tmp_tile_data+16;$4003
|
||||
CopyTwoLayerOver tmp_tile_data+20;$5003
|
||||
CopyTwoLayerOver tmp_tile_data+24;$6003
|
||||
CopyTwoLayerOver tmp_tile_data+28;$7003
|
||||
|
||||
sec
|
||||
lda _JTBL_CACHE
|
||||
sbc #SNIPPET_SIZE ; Advance to the next snippet (Reverse indexing)
|
||||
sta _JTBL_CACHE
|
||||
|
||||
clc
|
||||
lda _OP_CACHE
|
||||
adc #$0200 ; Advance to the next word
|
||||
sta _OP_CACHE
|
||||
|
||||
CopyTwoLayerOver tmp_tile_data+2;$0000
|
||||
CopyTwoLayerOver tmp_tile_data+6;$1000
|
||||
CopyTwoLayerOver tmp_tile_data+10;$2000
|
||||
CopyTwoLayerOver tmp_tile_data+14;$3000
|
||||
CopyTwoLayerOver tmp_tile_data+18;$4000
|
||||
CopyTwoLayerOver tmp_tile_data+22;$5000
|
||||
CopyTwoLayerOver tmp_tile_data+26;$6000
|
||||
CopyTwoLayerOver tmp_tile_data+30;$7000
|
||||
|
||||
plb
|
||||
rts
|
||||
|
||||
; Copy a tile into the tile data buffer and then render to the code field
|
||||
CopyTileATwoLyr
|
||||
lda TileStore+TS_JMP_ADDR,x ; Get the address of the exception handler
|
||||
sta _JTBL_CACHE
|
||||
|
||||
lda TileStore+TS_WORD_OFFSET,x ; Load the word offset of this tile (0 to 82 in steps of 2)
|
||||
ora #$B100 ; Pre-calc the LDA (dp),y opcode + operand
|
||||
xba
|
||||
sta _OP_CACHE
|
||||
|
||||
lda TileStore+TS_CODE_ADDR_HIGH,x
|
||||
pha
|
||||
ldy TileStore+TS_CODE_ADDR_LOW,x
|
||||
lda TileStore+TS_TILE_ADDR,x
|
||||
tax
|
||||
plb
|
||||
|
||||
]line equ 0
|
||||
lup 8
|
||||
ldal tiledata+{]line*4},x
|
||||
sta tmp_tile_data+{]line*4}
|
||||
ldal tiledata+{]line*4}+32,x
|
||||
sta tmp_tile_mask+{]line*4}
|
||||
|
||||
ldal tiledata+{]line*4}+2,x
|
||||
sta tmp_tile_data+{]line*4}+2
|
||||
ldal tiledata+{]line*4}+32+2,x
|
||||
sta tmp_tile_mask+{]line*4}+2
|
||||
]line equ ]line+1
|
||||
--^
|
||||
jmp _TmpTileDataToCodeField
|
||||
|
||||
CopyTileVTwoLyr
|
||||
lda TileStore+TS_JMP_ADDR,x ; Get the address of the exception handler
|
||||
sta _JTBL_CACHE
|
||||
|
||||
lda TileStore+TS_WORD_OFFSET,x ; Load the word offset of this tile (0 to 82 in steps of 2)
|
||||
ora #$B100 ; Pre-calc the LDA (dp),y opcode + operand
|
||||
xba
|
||||
sta _OP_CACHE
|
||||
|
||||
lda TileStore+TS_CODE_ADDR_HIGH,x
|
||||
pha
|
||||
ldy TileStore+TS_CODE_ADDR_LOW,x
|
||||
lda TileStore+TS_TILE_ADDR,x
|
||||
tax
|
||||
plb
|
||||
|
||||
]src equ 7
|
||||
]dest equ 0
|
||||
lup 8
|
||||
ldal tiledata+{]src*4},x
|
||||
sta tmp_tile_data+{]dest*4}
|
||||
ldal tiledata+{]src*4}+32,x
|
||||
sta tmp_tile_mask+{]dest*4}
|
||||
|
||||
ldal tiledata+{]src*4}+2,x
|
||||
sta tmp_tile_data+{]dest*4}+2
|
||||
ldal tiledata+{]src*4}+32+2,x
|
||||
sta tmp_tile_mask+{]dest*4}+2
|
||||
]src equ ]src-1
|
||||
]dest equ ]dest+1
|
||||
--^
|
||||
jmp _TmpTileDataToCodeField
|
||||
|
||||
; Handle sprites + tiles. Strategy is to merge the sprite and tile data and write it to the
|
||||
; temporary space an defer the actual work to the _TmpTileDataToCodeField helper
|
||||
SpriteOverATwoLyr
|
||||
ldy TileStore+TS_TILE_ADDR,x
|
||||
pei DP2_TILEDATA_AND_TILESTORE_BANKS
|
||||
plb
|
||||
|
||||
]line equ 0
|
||||
lup 8
|
||||
lda tiledata+{]line*4},y
|
||||
and tmp_sprite_mask+{]line*4}
|
||||
ora tmp_sprite_data+{]line*4}
|
||||
sta tmp_tile_data+{]line*4}
|
||||
|
||||
lda tiledata+{]line*4}+32,y
|
||||
and tmp_sprite_mask+{]line*4}
|
||||
sta tmp_tile_mask+{]line*4}
|
||||
|
||||
lda tiledata+{]line*4}+2,y
|
||||
and tmp_sprite_mask+{]line*4}+2
|
||||
ora tmp_sprite_data+{]line*4}+2
|
||||
sta tmp_tile_data+{]line*4}+2
|
||||
|
||||
lda tiledata+{]line*4}+32+2,y
|
||||
and tmp_sprite_mask+{]line*4}+2
|
||||
sta tmp_tile_mask+{]line*4}+2
|
||||
]line equ ]line+1
|
||||
--^
|
||||
plb
|
||||
jmp TmpTileDataToCodeField
|
||||
|
||||
SpriteOverVTwoLyr
|
||||
ldy TileStore+TS_TILE_ADDR,x
|
||||
pei DP2_TILEDATA_AND_TILESTORE_BANKS
|
||||
plb
|
||||
|
||||
]src equ 7
|
||||
]dest equ 0
|
||||
lup 8
|
||||
lda tiledata+{]src*4},y
|
||||
and tmp_sprite_mask+{]dest*4}
|
||||
ora tmp_sprite_data+{]dest*4}
|
||||
sta tmp_tile_data+{]dest*4}
|
||||
|
||||
lda tiledata+{]src*4}+32,y
|
||||
and tmp_sprite_mask+{]dest*4}
|
||||
sta tmp_tile_mask+{]dest*4}
|
||||
|
||||
lda tiledata+{]src*4}+2,y
|
||||
and tmp_sprite_mask+{]dest*4}+2
|
||||
ora tmp_sprite_data+{]dest*4}+2
|
||||
sta tmp_tile_data+{]dest*4}+2
|
||||
|
||||
lda tiledata+{]src*4}+32+2,y
|
||||
and tmp_sprite_mask+{]dest*4}+2
|
||||
sta tmp_tile_mask+{]dest*4}+2
|
||||
|
||||
]src equ ]src-1
|
||||
]dest equ ]dest+1
|
||||
--^
|
||||
plb
|
||||
jmp TmpTileDataToCodeField
|
||||
|
||||
SpriteUnderATwoLyr
|
||||
ldy TileStore+TS_TILE_ADDR,x
|
||||
pei DP2_TILEDATA_AND_TILESTORE_BANKS
|
||||
plb
|
||||
|
||||
]line equ 0
|
||||
lup 8
|
||||
lda tmp_sprite_data+{]line*4}
|
||||
and tiledata+{]line*4}+32,y
|
||||
ora tiledata+{]line*4},y
|
||||
sta tmp_tile_data+{]line*4}
|
||||
|
||||
lda tiledata+{]line*4}+32,y
|
||||
and tmp_sprite_mask+{]line*4}
|
||||
sta tmp_tile_mask+{]line*4}
|
||||
|
||||
lda tmp_sprite_data+{]line*4}+2
|
||||
and tiledata+{]line*4}+32+2,y
|
||||
ora tiledata+{]line*4}+2,y
|
||||
sta tmp_tile_data+{]line*4}+2
|
||||
|
||||
lda tiledata+{]line*4}+32+2,y
|
||||
and tmp_sprite_mask+{]line*4}+2
|
||||
sta tmp_tile_mask+{]line*4}+2
|
||||
]line equ ]line+1
|
||||
--^
|
||||
plb
|
||||
jmp TmpTileDataToCodeField
|
||||
|
||||
SpriteUnderVTwoLyr
|
||||
ldy TileStore+TS_TILE_ADDR,x
|
||||
pei DP2_TILEDATA_AND_TILESTORE_BANKS
|
||||
plb
|
||||
|
||||
]src equ 7
|
||||
]dest equ 0
|
||||
lup 8
|
||||
lda tmp_sprite_data+{]dest*4}
|
||||
and tiledata+{]src*4}+32,y
|
||||
ora tiledata+{]src*4},y
|
||||
sta tmp_tile_data+{]dest*4}
|
||||
|
||||
lda tiledata+{]src*4}+32,y
|
||||
and tmp_sprite_mask+{]dest*4}
|
||||
sta tmp_tile_mask+{]dest*4}
|
||||
|
||||
lda tmp_sprite_data+{]dest*4}+2
|
||||
and tiledata+{]src*4}+32+2,y
|
||||
ora tiledata+{]src*4}+2,y
|
||||
sta tmp_tile_data+{]dest*4}+2
|
||||
|
||||
lda tiledata+{]src*4}+32+2,y
|
||||
and tmp_sprite_mask+{]dest*4}+2
|
||||
sta tmp_tile_mask+{]dest*4}+2
|
||||
|
||||
]src equ ]src-1
|
||||
]dest equ ]dest+1
|
||||
--^
|
||||
plb
|
||||
jmp TmpTileDataToCodeField
|
||||
|
||||
; Macro to fill in the code field from a direct page temporary buffer
|
||||
;
|
||||
; ]1 : direct page address with data, the mask direct page address is data + 32
|
||||
; ]2 : code field offset
|
||||
;
|
||||
; Y is the code field address
|
||||
CopyTwoLayerOver mac
|
||||
lda {]1}+32 ; load the mask value
|
||||
bne mixed ; a non-zero value may be mixed
|
||||
|
||||
; This is a solid word
|
||||
lda #$00F4 ; PEA instruction
|
||||
sta: ]2,y
|
||||
lda {]1} ; load the tile data
|
||||
sta: ]2+1,y ; PEA operand
|
||||
bra next
|
||||
|
||||
mixed cmp #$FFFF ; All 1's in the mask is fully transparent
|
||||
beq transparent
|
||||
|
||||
lda #$004C ; JMP instruction
|
||||
sta: {]2},y
|
||||
lda _JTBL_CACHE ; Get the offset to the exception handler for this column
|
||||
ora #{]2&$7000} ; adjust for the current row offset
|
||||
sta: {]2}+1,y
|
||||
tax ; This becomes the new address that we use to patch in
|
||||
|
||||
lda #$29
|
||||
sta: $0002,x ; AND #$0000 opcode
|
||||
lda #$09
|
||||
sta: $0005,x ; ORA #$0000 opcode
|
||||
|
||||
lda _OP_CACHE ; Get the LDA (dp),y instruction for this column
|
||||
sta: $0000,x
|
||||
|
||||
lda {]1}+32 ; insert the tile mask and data into the exception
|
||||
sta: $0003,x ; handler.
|
||||
lda {]1}
|
||||
sta: $0006,x
|
||||
|
||||
lda #$0D80 ; branch to the prologue (BRA *+15)
|
||||
sta: $0008,x
|
||||
|
||||
bra next
|
||||
|
||||
; This is a transparent word, so just show the second background layer
|
||||
transparent
|
||||
lda #$4800 ; put a PHA after the offset
|
||||
sta: {]2}+1,y
|
||||
lda _OP_CACHE
|
||||
sta: {]2},y
|
||||
next
|
||||
eom
|
||||
Loading…
Reference in New Issue