mirror of
https://github.com/lscharen/iigs-game-engine.git
synced 2025-03-23 12:31:09 +00:00
Add in all the two-layer tile renderers; update complete. Just need to test
This commit is contained in:
Lucas Scharenbroich
parent
3292572261
commit
bcdc543241
@ -139,6 +139,7 @@ tmp_tile_mask equ 112 ; 32 byte temporary buffer to build up
|
||||
_X_REG equ 144
|
||||
_Y_REG equ 146
|
||||
_T_PTR equ 148 ; Copy of the tile address pointer
|
||||
_OP_CACHE2 equ 148 ; CAche of second opcode
|
||||
_BASE_ADDR equ 150 ; Copy of BTableLow for this tile
|
||||
_SPR_X_REG equ 152 ; Cache address of sprite plane source for a tile
|
||||
_JTBL_CACHE equ 154 ; Cache the offset to the exception handler for a column
|
||||
|
||||
25
src/Tiles.s
25
src/Tiles.s
@ -243,15 +243,21 @@ _SetTile
|
||||
|
||||
lda EngineMode
|
||||
bit #ENGINE_MODE_DYN_TILES+ENGINE_MODE_TWO_LAYER
|
||||
bne :not_fast
|
||||
brl :setTileFast
|
||||
beq :setTileFast
|
||||
|
||||
:not_fast bit #ENGINE_MODE_TWO_LAYER
|
||||
bit #ENGINE_MODE_TWO_LAYER
|
||||
bne :not_dyn
|
||||
brl :setTileDyn
|
||||
|
||||
:not_dyn
|
||||
ldy #SlowProcs ; safe for now....
|
||||
lda #TILE_DYN_BIT
|
||||
bit newTileId
|
||||
beq :pickTwoLyrProc
|
||||
|
||||
ldy #TwoLyrDynProcs
|
||||
brl :pickDynProc
|
||||
|
||||
:pickTwoLyrProc ldy #SlowProcs ; #TwoLyrProcs
|
||||
lda procIdx
|
||||
jsr _SetTileProcs
|
||||
jmp _PushDirtyTileX
|
||||
@ -271,12 +277,12 @@ _SetTile
|
||||
bit newTileId
|
||||
beq :pickSlowProc ; If the Dynamic bit is not set, select a tile proc that sets opcodes
|
||||
|
||||
ldy #DynProcs ; use this table
|
||||
:pickDynProc
|
||||
lda newTileId ; Otherwise chose one of the two dynamic tuples
|
||||
and #TILE_PRIORITY_BIT
|
||||
beq :pickDynProc ; If the Priority bit is not set, pick the first entry
|
||||
beq *+5 ; If the Priority bit is not set, pick the first entry
|
||||
lda #1 ; If the Priority bit is set, pick the other one
|
||||
|
||||
:pickDynProc ldy #DynProcs
|
||||
jsr _SetTileProcs
|
||||
jmp _PushDirtyTileX
|
||||
|
||||
@ -404,6 +410,11 @@ TwoLyrUnderZV dw Tile0TwoLyr,SpriteOver0TwoLyr,OneSpriteOver0TwoLyr
|
||||
TwoLyrUnderNA dw CopyTileATwoLyr,SpriteUnderATwoLyr,OneSpriteTwoLyrUnderA
|
||||
TwoLyrUnderNV dw CopyTileVTwoLyr,SpriteUnderVTwoLyr,OneSpriteTwoLyrUnderV
|
||||
|
||||
; "Dynamic" procs that can handle the second background.
|
||||
TwoLyrDynProcs
|
||||
TwoLyrDynOver dw CopyDynamicTileTwoLyr,DynamicOverTwoLyr,OneSpriteDynamicOverTwoLyr
|
||||
TwoLyrDynUnder dw CopyDynamicTileTwoLyr,DynamicUnderTwoLyr,OneSpriteDynamicUnderTwoLyr
|
||||
|
||||
; SetBG0XPos
|
||||
;
|
||||
; Set the virtual horizontal position of the primary background layer. In addition to
|
||||
|
||||
@ -133,10 +133,11 @@ DynamicUnder
|
||||
CopyDynUnder 30;$7000
|
||||
|
||||
; Now fill in the JMP opcodes
|
||||
_DynFillJmpOpcode
|
||||
sep #$20
|
||||
lda #$4C
|
||||
sta: $0000,y
|
||||
sta: $0003,y
|
||||
sta: $0000,y
|
||||
sta: $0003,y
|
||||
sta $1000,y
|
||||
sta $1003,y
|
||||
sta $2000,y
|
||||
@ -156,6 +157,185 @@ DynamicUnder
|
||||
plb
|
||||
rts
|
||||
|
||||
; Bank is already set to code field
|
||||
; Y register is the offset
|
||||
; X register is the TileStore
|
||||
; A is the tile address
|
||||
CopyDynamicTileTwoLyr
|
||||
|
||||
ldal TileStore+TS_JMP_ADDR,x ; Get the address of the exception handler
|
||||
sta _JTBL_CACHE
|
||||
|
||||
ldal TileStore+TS_WORD_OFFSET,x
|
||||
ora #$B100 ; Pre-calc the LDA (dp),y opcode + operand
|
||||
xba
|
||||
sta _OP_CACHE
|
||||
|
||||
; We need to do an AND dp|$80,x / ORA dp,x. The opcode values are $35 and $15, respectively.
|
||||
; We pre-calculate the AND opcode with the high bit of the operand set and then, in the macro
|
||||
; perform and EOR #$2080 to covert the opcode and operand in one instruction
|
||||
|
||||
ldal TileStore+TS_TILE_ID,x ; Get the original tile descriptor
|
||||
and #$007F ; clamp to < (32 * 4)
|
||||
ora #$3580 ; Pre-calc the AND $80,x opcode + operand
|
||||
xba
|
||||
sta _OP_CACHE2 ; This is an op to load the dynamic tile data
|
||||
|
||||
CopyMaskedDWord $0003
|
||||
CopyMaskedDWord $1003
|
||||
CopyMaskedDWord $2003
|
||||
CopyMaskedDWord $3003
|
||||
CopyMaskedDWord $4003
|
||||
CopyMaskedDWord $5003
|
||||
CopyMaskedDWord $6003
|
||||
CopyMaskedDWord $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
|
||||
|
||||
lda _OP_CACHE2
|
||||
adc #$0200
|
||||
sta _OP_CACHE2
|
||||
|
||||
CopyMaskedDWord $0000
|
||||
CopyMaskedDWord $1000
|
||||
CopyMaskedDWord $2000
|
||||
CopyMaskedDWord $3000
|
||||
CopyMaskedDWord $4000
|
||||
CopyMaskedDWord $5000
|
||||
CopyMaskedDWord $6000
|
||||
CopyMaskedDWord $7000
|
||||
|
||||
jmp _DynFillJmpOpcode
|
||||
|
||||
; Render a sprite on top of a dyamic tile with transparent areas shwing the second background
|
||||
DynamicOverTwoLyr
|
||||
lda TileStore+TS_JMP_ADDR,x ; Get the address of the exception handler
|
||||
sta _JTBL_CACHE
|
||||
|
||||
lda TileStore+TS_WORD_OFFSET,x
|
||||
ora #$B100 ; Pre-calc the LDA (dp),y opcode + operand
|
||||
xba
|
||||
sta _OP_CACHE
|
||||
|
||||
; We need to do an AND dp|$80,x / ORA dp,x. The opcode values are $35 and $15, respectively.
|
||||
; We pre-calculate the AND opcode with the high bit of the operand set and then, in the macro
|
||||
; perform and EOR #$2080 to covert the opcode and operand in one instruction
|
||||
|
||||
lda TileStore+TS_TILE_ID,x ; Get the original tile descriptor
|
||||
and #$007F ; clamp to < (32 * 4)
|
||||
ora #$3580 ; Pre-calc the AND $80,x opcode + operand
|
||||
xba
|
||||
sta _OP_CACHE2 ; This is an op to load the dynamic tile data
|
||||
|
||||
lda TileStore+TS_CODE_ADDR_HIGH,x
|
||||
pha
|
||||
ldy TileStore+TS_CODE_ADDR_LOW,x
|
||||
plb
|
||||
|
||||
CopyDynMaskedSpriteWord 0;$0003
|
||||
CopyDynMaskedSpriteWord 4;$1003
|
||||
CopyDynMaskedSpriteWord 8;$2003
|
||||
CopyDynMaskedSpriteWord 12;$3003
|
||||
CopyDynMaskedSpriteWord 16;$4003
|
||||
CopyDynMaskedSpriteWord 20;$5003
|
||||
CopyDynMaskedSpriteWord 24;$6003
|
||||
CopyDynMaskedSpriteWord 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
|
||||
|
||||
lda _OP_CACHE2
|
||||
adc #$0200 ; Advance to the next word
|
||||
sta _OP_CACHE2
|
||||
|
||||
CopyDynMaskedSpriteWord 2;$0000
|
||||
CopyDynMaskedSpriteWord 6;$1000
|
||||
CopyDynMaskedSpriteWord 10;$2000
|
||||
CopyDynMaskedSpriteWord 14;$3000
|
||||
CopyDynMaskedSpriteWord 18;$4000
|
||||
CopyDynMaskedSpriteWord 22;$5000
|
||||
CopyDynMaskedSpriteWord 26;$6000
|
||||
CopyDynMaskedSpriteWord 30;$7000
|
||||
|
||||
plb
|
||||
rts
|
||||
|
||||
; Render a sprite on top of a dyamic tile with transparent areas shwing the second background
|
||||
DynamicUnderTwoLyr
|
||||
lda TileStore+TS_JMP_ADDR,x ; Get the address of the exception handler
|
||||
sta _JTBL_CACHE
|
||||
|
||||
lda TileStore+TS_WORD_OFFSET,x
|
||||
ora #$B100 ; Pre-calc the LDA (dp),y opcode + operand
|
||||
xba
|
||||
sta _OP_CACHE
|
||||
|
||||
; We need to do an AND dp|$80,x / ORA dp,x. The opcode values are $35 and $15, respectively.
|
||||
; We pre-calculate the AND opcode with the high bit of the operand set and then, in the macro
|
||||
; perform and EOR #$2080 to covert the opcode and operand in one instruction
|
||||
|
||||
lda TileStore+TS_TILE_ID,x ; Get the original tile descriptor
|
||||
and #$007F ; clamp to < (32 * 4)
|
||||
ora #$3580 ; Pre-calc the AND $80,x opcode + operand
|
||||
xba
|
||||
sta _OP_CACHE2 ; This is an op to load the dynamic tile data
|
||||
|
||||
lda TileStore+TS_CODE_ADDR_HIGH,x
|
||||
pha
|
||||
ldy TileStore+TS_CODE_ADDR_LOW,x
|
||||
plb
|
||||
|
||||
CopyDynPrioMaskedSpriteWord 0;$0003
|
||||
CopyDynPrioMaskedSpriteWord 4;$1003
|
||||
CopyDynPrioMaskedSpriteWord 8;$2003
|
||||
CopyDynPrioMaskedSpriteWord 12;$3003
|
||||
CopyDynPrioMaskedSpriteWord 16;$4003
|
||||
CopyDynPrioMaskedSpriteWord 20;$5003
|
||||
CopyDynPrioMaskedSpriteWord 24;$6003
|
||||
CopyDynPrioMaskedSpriteWord 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
|
||||
|
||||
lda _OP_CACHE2
|
||||
adc #$0200 ; Advance to the next word
|
||||
sta _OP_CACHE2
|
||||
|
||||
CopyDynPrioMaskedSpriteWord 2;$0000
|
||||
CopyDynPrioMaskedSpriteWord 6;$1000
|
||||
CopyDynPrioMaskedSpriteWord 10;$2000
|
||||
CopyDynPrioMaskedSpriteWord 14;$3000
|
||||
CopyDynPrioMaskedSpriteWord 18;$4000
|
||||
CopyDynPrioMaskedSpriteWord 22;$5000
|
||||
CopyDynPrioMaskedSpriteWord 26;$6000
|
||||
CopyDynPrioMaskedSpriteWord 30;$7000
|
||||
|
||||
plb
|
||||
rts
|
||||
|
||||
|
||||
; Create a masked render based on data in the direct page temporary buffer.
|
||||
;
|
||||
; If the MASK is $0000, then insert a PEA
|
||||
@ -246,6 +426,172 @@ CopyDynUnder MAC
|
||||
sta: $0007,x
|
||||
eom
|
||||
|
||||
; Masked renderer for a dynamic tile. What's interesting about this renderer is that the mask
|
||||
; value is not used directly, but simply indicates if we can use a LDA 0,x / PHA sequence,
|
||||
; a LDA (00),y / PHA, or a JMP to a blended render
|
||||
;
|
||||
; If a dynamic tile is animated, there is the possibility to create a special mask that marks
|
||||
; words of the tile that a front / back / mixed across all frames.
|
||||
;
|
||||
; ]1 : code field offset
|
||||
;
|
||||
; This macro does not set the opcode since they will all be JMP instructions, they can be
|
||||
; filled more efficiently in a separate routine.
|
||||
CopyMaskedDWord MAC
|
||||
|
||||
; Need to fill in the first 6 bytes of the JMP handler with the following code sequence
|
||||
;
|
||||
; lda (00),y
|
||||
; and $80,x
|
||||
; ora $00,x
|
||||
; bra *+17
|
||||
|
||||
lda _JTBL_CACHE
|
||||
ora #{{]1}&$7000} ; adjust for the current row offset
|
||||
sta: {]1}+1,y
|
||||
|
||||
tax ; This becomes the new address that we use to patch in
|
||||
lda _OP_CACHE
|
||||
sta: $0000,x ; LDA (00),y
|
||||
lda _OP_CACHE2
|
||||
sta: $0002,x ; AND $80,x
|
||||
eor #$8020 ; Switch the opcode to an ORA and remove the high bit of the operand
|
||||
sta: $0004,x ; ORA $00,x
|
||||
lda #$0F80 ; branch to the prologue (BRA *+17)
|
||||
sta: $0006,x
|
||||
eom
|
||||
|
||||
|
||||
; Masked renderer for a masked dynamic tile with sprite data overlaid.
|
||||
;
|
||||
; ]1 : sprite plane offset
|
||||
; ]2 : code field offset
|
||||
CopyDynMaskedSpriteWord MAC
|
||||
|
||||
; Need to fill in the first 14 bytes of the JMP handler with the following code sequence where
|
||||
; the data and mask from from the sprite plane
|
||||
;
|
||||
; lda ($00),y
|
||||
; and $80,x
|
||||
; ora $00,x
|
||||
; and #MASK
|
||||
; ora #DATA
|
||||
; bra *+15
|
||||
;
|
||||
; If MASK == 0, then we can do a PEA. If MASK == $FFFF, then fall back to the simple Dynamic Tile
|
||||
; code and eliminate the constanct AND/ORA instructions.
|
||||
|
||||
lda tmp_sprite_mask+{]1} ; 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 tmp_sprite_data+{]1} ; load the sprite data
|
||||
sta: {]2}+1,y ; PEA operand
|
||||
bra next
|
||||
|
||||
; We will always do a JMP to the exception handler, so set that up, then check for sprite
|
||||
; transparency
|
||||
mixed
|
||||
lda #$004C ; JMP to handler
|
||||
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 _OP_CACHE
|
||||
sta: $0000,x ; LDA (00),y
|
||||
lda _OP_CACHE2
|
||||
sta: $0002,x ; AND $80,x
|
||||
eor #$8020 ; Switch the opcode to an ORA and remove the high bit of the operand
|
||||
sta: $0004,x ; ORA $00,x
|
||||
|
||||
lda #$0029 ; AND #SPRITE_MASK
|
||||
sta: $0006,x
|
||||
lda tmp_sprite_mask+{]1}
|
||||
cmp #$FFFF ; All 1's in the mask is a fully transparent sprite word
|
||||
beq transparent
|
||||
sta: $0007,x
|
||||
|
||||
lda #$0009 ; ORA #SPRITE_DATA
|
||||
sta: $0009,x
|
||||
lda tmp_sprite_data+{]1}
|
||||
sta: $000A,x
|
||||
|
||||
lda #$0980 ; branch to the prologue (BRA *+11)
|
||||
sta: $000C,x
|
||||
bra next
|
||||
|
||||
; This is a transparent word, so just show the dynamic data
|
||||
transparent
|
||||
lda #$0F80 ; branch to the epilogue (BRA *+17)
|
||||
sta: $0006,x
|
||||
next
|
||||
eom
|
||||
|
||||
|
||||
; Masked renderer for a masked dynamic tile with sprite data underlaid.
|
||||
;
|
||||
; ]1 : sprite plane offset
|
||||
; ]2 : code field offset
|
||||
CopyDynPrioMaskedSpriteWord MAC
|
||||
|
||||
; Need to fill in the first 14 bytes of the JMP handler with the following code sequence where
|
||||
; the data and mask from from the sprite plane
|
||||
;
|
||||
; lda ($00),y
|
||||
; and #MASK
|
||||
; ora #DATA
|
||||
; and $80,x
|
||||
; ora $00,x
|
||||
; bra *+15
|
||||
|
||||
lda #$004C ; JMP to handler
|
||||
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 _OP_CACHE
|
||||
sta: $0000,x ; LDA (00),y
|
||||
|
||||
lda #$0029 ; AND #SPRITE_MASK
|
||||
sta: $0002,x
|
||||
|
||||
lda tmp_sprite_mask+{]1}
|
||||
cmp #$FFFF ; All 1's in the mask is a fully transparent sprite word
|
||||
beq transparent ; so we can use the Tile00011 method
|
||||
sta: $0003,x
|
||||
|
||||
lda #$0009 ; ORA #SPRITE_DATA
|
||||
sta: $0005,x
|
||||
lda tmp_sprite_data+{]1}
|
||||
sta: $0006,x
|
||||
|
||||
lda _OP_CACHE2
|
||||
sta: $0008,x ; AND $80,x
|
||||
eor #$8020 ; Switch the opcode to an ORA and remove the high bit of the operand
|
||||
sta: $000A,x ; ORA $00,x
|
||||
|
||||
lda #$0980 ; branch to the prologue (BRA *+11)
|
||||
sta: $000C,x
|
||||
bra next
|
||||
|
||||
; This is a transparent word, so just show the dynamic data
|
||||
transparent
|
||||
lda _OP_CACHE2
|
||||
sta: $0002,x ; AND $80,x
|
||||
eor #$8020 ; Switch the opcode to an ORA and remove the high bit of the operand
|
||||
sta: $0004,x ; ORA $00,x
|
||||
|
||||
lda #$0F80 ; branch to the epilogue (BRA *+17)
|
||||
sta: $0006,x
|
||||
next
|
||||
eom
|
||||
|
||||
; Helper functions to move tile data into the dynamic tile space
|
||||
|
||||
; Helper functions to copy tile data to the appropriate location in Bank 0
|
||||
|
||||
@ -79,7 +79,7 @@ FillPEAOpcode
|
||||
rep #$20
|
||||
rts
|
||||
|
||||
; This is a dtub; will be removed eventually
|
||||
; This is a stub; will be removed eventually
|
||||
_FillPEAOpcode
|
||||
jsr FillPEAOpcode
|
||||
plb ; Restore the TileStore bank
|
||||
|
||||
@ -28,7 +28,7 @@ _OneSpriteFastOver0
|
||||
plb ; Restore the TileStore bank
|
||||
rts
|
||||
|
||||
; Next implementation; drawing a sprite onto a regular tile. The 1-sprite dispatch preerves the
|
||||
; Next implementation; drawing a sprite onto a regular tile. The 1-sprite dispatch preserves the
|
||||
; X-register, so it already points to the TileStore
|
||||
|
||||
OneSpriteFastOverV
|
||||
@ -158,55 +158,20 @@ OneSpriteSlowUnderV
|
||||
OneSpriteDynamicUnder
|
||||
txy
|
||||
tax
|
||||
]line equ 0
|
||||
lup 8
|
||||
ldal spritedata+{]line*SPRITE_PLANE_SPAN},x
|
||||
sta tmp_sprite_data+{]line*4}
|
||||
ldal spritedata+{]line*SPRITE_PLANE_SPAN}+2,x
|
||||
sta tmp_sprite_data+{]line*4}+2
|
||||
]line equ ]line+1
|
||||
--^
|
||||
jsr _CopySpriteDataToDP
|
||||
tyx
|
||||
jmp DynamicUnder
|
||||
|
||||
OneSpriteDynamicOver
|
||||
txy
|
||||
tax
|
||||
]line equ 0
|
||||
lup 8
|
||||
ldal spritedata+{]line*SPRITE_PLANE_SPAN},x
|
||||
sta tmp_sprite_data+{]line*4}
|
||||
ldal spritedata+{]line*SPRITE_PLANE_SPAN}+2,x
|
||||
sta tmp_sprite_data+{]line*4}+2
|
||||
|
||||
ldal spritemask+{]line*SPRITE_PLANE_SPAN},x
|
||||
sta tmp_sprite_mask+{]line*4}
|
||||
ldal spritemask+{]line*SPRITE_PLANE_SPAN}+2,x
|
||||
sta tmp_sprite_mask+{]line*4}+2
|
||||
]line equ ]line+1
|
||||
--^
|
||||
jsr _CopySpriteDataAndMaskToDP
|
||||
tyx
|
||||
jmp DynamicOver
|
||||
|
||||
|
||||
;-------------------------------
|
||||
; Two Layer tiles with one sprite. Just copy the data and go through the generic sprite path
|
||||
_CopySpriteDataAndMaskToDP
|
||||
]line equ 0
|
||||
lup 8
|
||||
ldal spritedata+{]line*SPRITE_PLANE_SPAN},x
|
||||
sta tmp_sprite_data+{]line*4}
|
||||
ldal spritedata+{]line*SPRITE_PLANE_SPAN}+2,x
|
||||
sta tmp_sprite_data+{]line*4}+2
|
||||
|
||||
ldal spritemask+{]line*SPRITE_PLANE_SPAN},x
|
||||
sta tmp_sprite_mask+{]line*4}
|
||||
ldal spritemask+{]line*SPRITE_PLANE_SPAN}+2,x
|
||||
sta tmp_sprite_mask+{]line*4}+2
|
||||
]line equ ]line+1
|
||||
--^
|
||||
rts
|
||||
|
||||
OneSpriteOver0TwoLyr
|
||||
txy
|
||||
tax
|
||||
@ -241,3 +206,60 @@ OneSpriteTwoLyrUnderV
|
||||
jsr _CopySpriteDataAndMaskToDP
|
||||
tyx
|
||||
jmp SpriteUnderVTwoLyr
|
||||
|
||||
;-----------------------------------------
|
||||
; Dynamic two-layer tiles with one sprite.
|
||||
|
||||
OneSpriteDynamicOverTwoLyr
|
||||
txy
|
||||
tax
|
||||
jsr _CopySpriteDataAndMaskToDP
|
||||
tyx
|
||||
jmp DynamicOverTwoLyr
|
||||
|
||||
OneSpriteDynamicUnderTwoLyr
|
||||
txy
|
||||
tax
|
||||
jsr _CopySpriteDataAndMaskToDP
|
||||
tyx
|
||||
jmp DynamicUnderTwoLyr
|
||||
|
||||
;-------------------------------------
|
||||
; Generic helpers
|
||||
_CopySpriteDataToDP
|
||||
]line equ 0
|
||||
lup 8
|
||||
ldal spritedata+{]line*SPRITE_PLANE_SPAN},x
|
||||
sta tmp_sprite_data+{]line*4}
|
||||
ldal spritedata+{]line*SPRITE_PLANE_SPAN}+2,x
|
||||
sta tmp_sprite_data+{]line*4}+2
|
||||
]line equ ]line+1
|
||||
--^
|
||||
rts
|
||||
|
||||
_CopySpriteMaskToDP
|
||||
]line equ 0
|
||||
lup 8
|
||||
ldal spritemask+{]line*SPRITE_PLANE_SPAN},x
|
||||
sta tmp_sprite_mask+{]line*4}
|
||||
ldal spritemask+{]line*SPRITE_PLANE_SPAN}+2,x
|
||||
sta tmp_sprite_mask+{]line*4}+2
|
||||
]line equ ]line+1
|
||||
--^
|
||||
rts
|
||||
|
||||
_CopySpriteDataAndMaskToDP
|
||||
]line equ 0
|
||||
lup 8
|
||||
ldal spritedata+{]line*SPRITE_PLANE_SPAN},x
|
||||
sta tmp_sprite_data+{]line*4}
|
||||
ldal spritedata+{]line*SPRITE_PLANE_SPAN}+2,x
|
||||
sta tmp_sprite_data+{]line*4}+2
|
||||
|
||||
ldal spritemask+{]line*SPRITE_PLANE_SPAN},x
|
||||
sta tmp_sprite_mask+{]line*4}
|
||||
ldal spritemask+{]line*SPRITE_PLANE_SPAN}+2,x
|
||||
sta tmp_sprite_mask+{]line*4}+2
|
||||
]line equ ]line+1
|
||||
--^
|
||||
rts
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user