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
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@ -139,6 +139,7 @@ tmp_tile_mask equ 112 ; 32 byte temporary buffer to build up
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_X_REG equ 144
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_Y_REG equ 146
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_T_PTR equ 148 ; Copy of the tile address pointer
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_OP_CACHE2 equ 148 ; CAche of second opcode
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_BASE_ADDR equ 150 ; Copy of BTableLow for this tile
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_SPR_X_REG equ 152 ; Cache address of sprite plane source for a tile
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_JTBL_CACHE equ 154 ; Cache the offset to the exception handler for a column
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25
src/Tiles.s
25
src/Tiles.s
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@ -243,15 +243,21 @@ _SetTile
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lda EngineMode
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bit #ENGINE_MODE_DYN_TILES+ENGINE_MODE_TWO_LAYER
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bne :not_fast
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brl :setTileFast
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beq :setTileFast
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:not_fast bit #ENGINE_MODE_TWO_LAYER
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bit #ENGINE_MODE_TWO_LAYER
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bne :not_dyn
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brl :setTileDyn
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:not_dyn
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ldy #SlowProcs ; safe for now....
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lda #TILE_DYN_BIT
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bit newTileId
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beq :pickTwoLyrProc
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ldy #TwoLyrDynProcs
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brl :pickDynProc
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:pickTwoLyrProc ldy #SlowProcs ; #TwoLyrProcs
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lda procIdx
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jsr _SetTileProcs
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jmp _PushDirtyTileX
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@ -271,12 +277,12 @@ _SetTile
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bit newTileId
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beq :pickSlowProc ; If the Dynamic bit is not set, select a tile proc that sets opcodes
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ldy #DynProcs ; use this table
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:pickDynProc
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lda newTileId ; Otherwise chose one of the two dynamic tuples
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and #TILE_PRIORITY_BIT
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beq :pickDynProc ; If the Priority bit is not set, pick the first entry
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beq *+5 ; If the Priority bit is not set, pick the first entry
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lda #1 ; If the Priority bit is set, pick the other one
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:pickDynProc ldy #DynProcs
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jsr _SetTileProcs
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jmp _PushDirtyTileX
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@ -404,6 +410,11 @@ 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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; "Dynamic" procs that can handle the second background.
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TwoLyrDynProcs
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TwoLyrDynOver dw CopyDynamicTileTwoLyr,DynamicOverTwoLyr,OneSpriteDynamicOverTwoLyr
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TwoLyrDynUnder dw CopyDynamicTileTwoLyr,DynamicUnderTwoLyr,OneSpriteDynamicUnderTwoLyr
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; SetBG0XPos
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;
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; Set the virtual horizontal position of the primary background layer. In addition to
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@ -133,10 +133,11 @@ DynamicUnder
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CopyDynUnder 30;$7000
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; Now fill in the JMP opcodes
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_DynFillJmpOpcode
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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: $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 $2000,y
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@ -156,6 +157,185 @@ DynamicUnder
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plb
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rts
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; Bank is already set to code field
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; Y register is the offset
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; X register is the TileStore
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; A is the tile address
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CopyDynamicTileTwoLyr
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ldal TileStore+TS_JMP_ADDR,x ; Get the address of the exception handler
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sta _JTBL_CACHE
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ldal TileStore+TS_WORD_OFFSET,x
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ora #$B100 ; Pre-calc the LDA (dp),y opcode + operand
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xba
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sta _OP_CACHE
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; We need to do an AND dp|$80,x / ORA dp,x. The opcode values are $35 and $15, respectively.
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; We pre-calculate the AND opcode with the high bit of the operand set and then, in the macro
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; perform and EOR #$2080 to covert the opcode and operand in one instruction
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ldal 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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xba
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sta _OP_CACHE2 ; This is an op to load the dynamic tile data
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CopyMaskedDWord $0003
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CopyMaskedDWord $1003
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CopyMaskedDWord $2003
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CopyMaskedDWord $3003
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CopyMaskedDWord $4003
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CopyMaskedDWord $5003
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CopyMaskedDWord $6003
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CopyMaskedDWord $7003
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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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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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sta _OP_CACHE
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lda _OP_CACHE2
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adc #$0200
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sta _OP_CACHE2
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CopyMaskedDWord $0000
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CopyMaskedDWord $1000
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CopyMaskedDWord $2000
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CopyMaskedDWord $3000
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CopyMaskedDWord $4000
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CopyMaskedDWord $5000
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CopyMaskedDWord $6000
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CopyMaskedDWord $7000
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jmp _DynFillJmpOpcode
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; Render a sprite on top of a dyamic tile with transparent areas shwing the second background
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DynamicOverTwoLyr
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lda TileStore+TS_JMP_ADDR,x ; Get the address of the exception handler
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sta _JTBL_CACHE
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lda TileStore+TS_WORD_OFFSET,x
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ora #$B100 ; Pre-calc the LDA (dp),y opcode + operand
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xba
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sta _OP_CACHE
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; We need to do an AND dp|$80,x / ORA dp,x. The opcode values are $35 and $15, respectively.
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; We pre-calculate the AND opcode with the high bit of the operand set and then, in the macro
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; perform and EOR #$2080 to covert the opcode and operand in one instruction
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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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xba
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sta _OP_CACHE2 ; This is an op to load the dynamic tile data
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lda TileStore+TS_CODE_ADDR_HIGH,x
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pha
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ldy TileStore+TS_CODE_ADDR_LOW,x
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plb
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CopyDynMaskedSpriteWord 0;$0003
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CopyDynMaskedSpriteWord 4;$1003
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CopyDynMaskedSpriteWord 8;$2003
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CopyDynMaskedSpriteWord 12;$3003
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CopyDynMaskedSpriteWord 16;$4003
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CopyDynMaskedSpriteWord 20;$5003
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CopyDynMaskedSpriteWord 24;$6003
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CopyDynMaskedSpriteWord 28;$7003
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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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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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sta _OP_CACHE
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lda _OP_CACHE2
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adc #$0200 ; Advance to the next word
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sta _OP_CACHE2
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CopyDynMaskedSpriteWord 2;$0000
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CopyDynMaskedSpriteWord 6;$1000
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CopyDynMaskedSpriteWord 10;$2000
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CopyDynMaskedSpriteWord 14;$3000
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CopyDynMaskedSpriteWord 18;$4000
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CopyDynMaskedSpriteWord 22;$5000
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CopyDynMaskedSpriteWord 26;$6000
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CopyDynMaskedSpriteWord 30;$7000
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plb
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rts
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; Render a sprite on top of a dyamic tile with transparent areas shwing the second background
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DynamicUnderTwoLyr
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lda TileStore+TS_JMP_ADDR,x ; Get the address of the exception handler
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sta _JTBL_CACHE
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lda TileStore+TS_WORD_OFFSET,x
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ora #$B100 ; Pre-calc the LDA (dp),y opcode + operand
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xba
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sta _OP_CACHE
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; We need to do an AND dp|$80,x / ORA dp,x. The opcode values are $35 and $15, respectively.
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; We pre-calculate the AND opcode with the high bit of the operand set and then, in the macro
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; perform and EOR #$2080 to covert the opcode and operand in one instruction
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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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xba
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sta _OP_CACHE2 ; This is an op to load the dynamic tile data
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lda TileStore+TS_CODE_ADDR_HIGH,x
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pha
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ldy TileStore+TS_CODE_ADDR_LOW,x
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plb
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CopyDynPrioMaskedSpriteWord 0;$0003
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CopyDynPrioMaskedSpriteWord 4;$1003
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CopyDynPrioMaskedSpriteWord 8;$2003
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CopyDynPrioMaskedSpriteWord 12;$3003
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CopyDynPrioMaskedSpriteWord 16;$4003
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CopyDynPrioMaskedSpriteWord 20;$5003
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CopyDynPrioMaskedSpriteWord 24;$6003
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CopyDynPrioMaskedSpriteWord 28;$7003
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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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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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sta _OP_CACHE
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lda _OP_CACHE2
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adc #$0200 ; Advance to the next word
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sta _OP_CACHE2
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CopyDynPrioMaskedSpriteWord 2;$0000
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CopyDynPrioMaskedSpriteWord 6;$1000
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CopyDynPrioMaskedSpriteWord 10;$2000
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CopyDynPrioMaskedSpriteWord 14;$3000
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CopyDynPrioMaskedSpriteWord 18;$4000
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CopyDynPrioMaskedSpriteWord 22;$5000
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CopyDynPrioMaskedSpriteWord 26;$6000
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CopyDynPrioMaskedSpriteWord 30;$7000
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plb
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rts
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; Create a masked render based on data in the direct page temporary buffer.
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;
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; If the MASK is $0000, then insert a PEA
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@ -246,6 +426,172 @@ CopyDynUnder MAC
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sta: $0007,x
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eom
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; Masked renderer for a dynamic tile. What's interesting about this renderer is that the mask
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; value is not used directly, but simply indicates if we can use a LDA 0,x / PHA sequence,
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; a LDA (00),y / PHA, or a JMP to a blended render
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;
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; If a dynamic tile is animated, there is the possibility to create a special mask that marks
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; words of the tile that a front / back / mixed across all frames.
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;
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; ]1 : code field offset
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;
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; This macro does not set the opcode since they will all be JMP instructions, they can be
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; filled more efficiently in a separate routine.
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CopyMaskedDWord MAC
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; Need to fill in the first 6 bytes of the JMP handler with the following code sequence
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;
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; lda (00),y
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; and $80,x
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; ora $00,x
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; bra *+17
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lda _JTBL_CACHE
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ora #{{]1}&$7000} ; adjust for the current row offset
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sta: {]1}+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
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sta: $0000,x ; LDA (00),y
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lda _OP_CACHE2
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sta: $0002,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: $0004,x ; ORA $00,x
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lda #$0F80 ; branch to the prologue (BRA *+17)
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sta: $0006,x
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eom
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; Masked renderer for a masked dynamic tile with sprite data overlaid.
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;
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; ]1 : sprite plane offset
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; ]2 : code field offset
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CopyDynMaskedSpriteWord MAC
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; Need to fill in the first 14 bytes of the JMP handler with the following code sequence where
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; the data and mask from from the sprite plane
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;
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; lda ($00),y
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; and $80,x
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; ora $00,x
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; and #MASK
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; ora #DATA
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; bra *+15
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;
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; If MASK == 0, then we can do a PEA. If MASK == $FFFF, then fall back to the simple Dynamic Tile
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; code and eliminate the constanct AND/ORA instructions.
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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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; We will always do a JMP to the exception handler, so set that up, then check for sprite
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; transparency
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mixed
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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
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sta: $0000,x ; LDA (00),y
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lda _OP_CACHE2
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sta: $0002,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: $0004,x ; ORA $00,x
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lda #$0029 ; AND #SPRITE_MASK
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sta: $0006,x
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lda tmp_sprite_mask+{]1}
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cmp #$FFFF ; All 1's in the mask is a fully transparent sprite word
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beq transparent
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sta: $0007,x
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lda #$0009 ; ORA #SPRITE_DATA
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sta: $0009,x
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lda tmp_sprite_data+{]1}
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sta: $000A,x
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lda #$0980 ; branch to the prologue (BRA *+11)
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sta: $000C,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 #$0F80 ; branch to the epilogue (BRA *+17)
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sta: $0006,x
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next
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eom
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; Masked renderer for a masked dynamic tile with sprite data underlaid.
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;
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; ]1 : sprite plane offset
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; ]2 : code field offset
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CopyDynPrioMaskedSpriteWord MAC
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; Need to fill in the first 14 bytes of the JMP handler with the following code sequence where
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; the data and mask from from the sprite plane
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;
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; lda ($00),y
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; and #MASK
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; ora #DATA
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; and $80,x
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; ora $00,x
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; bra *+15
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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
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sta: $0000,x ; LDA (00),y
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lda #$0029 ; AND #SPRITE_MASK
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sta: $0002,x
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lda tmp_sprite_mask+{]1}
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cmp #$FFFF ; All 1's in the mask is a fully transparent sprite word
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beq transparent ; so we can use the Tile00011 method
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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 _OP_CACHE2
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sta: $0008,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: $000A,x ; ORA $00,x
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lda #$0980 ; branch to the prologue (BRA *+11)
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sta: $000C,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 _OP_CACHE2
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sta: $0002,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: $0004,x ; ORA $00,x
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lda #$0F80 ; branch to the epilogue (BRA *+17)
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sta: $0006,x
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next
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eom
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; Helper functions to move tile data into the dynamic tile space
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; Helper functions to copy tile data to the appropriate location in Bank 0
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@ -79,7 +79,7 @@ FillPEAOpcode
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rep #$20
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rts
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; This is a dtub; will be removed eventually
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; This is a stub; will be removed eventually
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_FillPEAOpcode
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jsr FillPEAOpcode
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plb ; Restore the TileStore bank
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@ -28,7 +28,7 @@ _OneSpriteFastOver0
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plb ; Restore the TileStore bank
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rts
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; Next implementation; drawing a sprite onto a regular tile. The 1-sprite dispatch preerves the
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; Next implementation; drawing a sprite onto a regular tile. The 1-sprite dispatch preserves the
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; X-register, so it already points to the TileStore
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OneSpriteFastOverV
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@ -158,55 +158,20 @@ OneSpriteSlowUnderV
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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…
Reference in New Issue