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https://github.com/lscharen/iigs-game-engine.git
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Add modular dispatch for copy routines; add initial support for tile priority bit
This commit is contained in:
Lucas Scharenbroich
parent
955cf4a580
commit
7af4a216a0
@ -150,6 +150,9 @@ _TILE_ID equ 158 ; Copy of the tile descriptor
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DP2_DIRTY_TILE_COUNT equ 160 ; Local copy of dirty tile count to avoid banking
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DP2_DIRTY_TILE_CALLBACK equ 162
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; Some pre-defined bank values
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DP2_TILEDATA_AND_TILESTORE_BANKS equ 164
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SPRITE_VBUFF_PTR equ 224 ; 32 bytes of adjusted pointers to VBuffArray addresses
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; End direct page values
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@ -601,6 +601,10 @@ _CacheSpriteBanks
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ora #^TileStore
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sta TileStoreBankAndTileDataBank
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xba
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ldx #$100
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sta DP2_TILEDATA_AND_TILESTORE_BANKS,x ; put a reversed copy in the second direct page
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lda #>TileStore
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and #$FF00
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ora #^TileStore
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37
src/Tiles.s
37
src/Tiles.s
@ -112,6 +112,10 @@ InitTiles
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:fast
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ldal FastTileProcs
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stal K_TS_BASE_TILE_DISP,x
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ldal FastTileCopy
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stal K_TS_COPY_TILE_DATA,x
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ldal FastSpriteSub
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stal K_TS_SPRITE_TILE_DISP,x
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:out
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; lda DirtyTileProcs ; Fill in with the first dispatch address
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@ -189,6 +193,10 @@ _SetTile
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; functionality. Sometimes it is simple, but in cases of the sprites overlapping Dynamic Tiles and other cases
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; it can be more involved.
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lda EngineMode
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bit #ENGINE_MODE_DYN_TILES+ENGINE_MODE_TWO_LAYER
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beq :fast
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lda TileStore+TS_TILE_ID,y
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and #TILE_VFLIP_BIT+TILE_HFLIP_BIT ; get the lookup value
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xba
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@ -199,10 +207,6 @@ _SetTile
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; ldal CopyTileProcs,x
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; sta TileStore+TS_DIRTY_TILE_COPY,y
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lda EngineMode
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bit #ENGINE_MODE_DYN_TILES+ENGINE_MODE_TWO_LAYER
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beq :fast
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lda TileStore+TS_TILE_ID,y ; Get the non-sprite dispatch address
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and #TILE_CTRL_MASK
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xba
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@ -212,10 +216,30 @@ _SetTile
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bra :out
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:fast
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tyx
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lda TileStore+TS_TILE_ID,y ; First, check if the sprites are over or under
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bit #TILE_PRIORITY_BIT
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beq :fast_over
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ldal FastSpriteSub+2
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bra :fast_under
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:fast_over ldal FastSpriteSub
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:fast_under stal K_TS_SPRITE_TILE_DISP,x
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lda TileStore+TS_TILE_ID,y ; Now, set the draw and copy routines based on H/V bits
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and #TILE_VFLIP_BIT+TILE_HFLIP_BIT ; get the lookup value
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xba
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tax
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phx
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ldal FastTileProcs,x
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tyx
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stal K_TS_BASE_TILE_DISP,x
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plx
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ldal FastTileCopy,x
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tyx
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stal K_TS_COPY_TILE_DATA,x
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:out
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jmp _PushDirtyTileY ; on the next call to _ApplyTiles
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@ -417,4 +441,7 @@ b_15_3 endbit 15;3;]4
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<<<
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; Store some tables in the K bank that will be used exclusively for jmp (abs,x) dispatch
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K_TS_BASE_TILE_DISP ds TILE_STORE_SIZE
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K_TS_BASE_TILE_DISP ds TILE_STORE_SIZE ; draw the tile without a sprite
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K_TS_COPY_TILE_DATA ds TILE_STORE_SIZE ; copy the tile into temp storage (used when tile below sprite)
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K_TS_SPRITE_TILE_DISP ds TILE_STORE_SIZE ; select the sprite routine for this tile
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@ -30,15 +30,30 @@ _TBCopyTileDataAndMaskToCBuffV
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_CopyTileDataToDP2
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]line equ 0
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lup 8
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ldal tiledata+{]line*4},x
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lda tiledata+{]line*4},y
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sta tmp_tile_data+{]line*4}
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ldal tiledata+{]line*4}+2,x
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lda tiledata+{]line*4}+2,y
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sta tmp_tile_data+{]line*4}+2
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]line equ ]line+1
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--^
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rts
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_CopyTileDataToDP2V
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]src equ 7
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]dest equ 0
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lup 8
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lda tiledata+{]src*4},y
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sta tmp_tile_data+{]dest*4}
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lda tiledata+{]src*4}+2,y
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sta tmp_tile_data+{]dest*4}+2
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]src equ ]src-1
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]dest equ ]dest+1
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--^
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rts
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_TBCopyTileDataToCBuff
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]line equ 0
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lup 8
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@ -67,6 +67,19 @@ _TBCopyData
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_TBCopyDataVFast
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tax
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]src equ 7
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]dest equ 0
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lup 8
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ldal tiledata+{]src*4},x
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sta: $0004+{]dest*$1000},y
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ldal tiledata+{]src*4}+2,x
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sta: $0001+{]dest*$1000},y
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]src equ ]src-1
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]dest equ ]dest+1
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--^
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plb
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rts
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_TBCopyDataV
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]src equ 7
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]dest equ 0
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@ -9,7 +9,6 @@ _RenderTileFast
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lda TileStore+TS_SPRITE_FLAG,x ; any sprites on this line?
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bne SpriteDispatch
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NoSpriteFast
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lda TileStore+TS_CODE_ADDR_HIGH,x ; load the bank of the target code field line
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pha ; and put on the stack for later. Has TileStore bank in high byte.
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ldy TileStore+TS_CODE_ADDR_LOW,x ; load the address of the code field
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@ -19,19 +18,25 @@ NoSpriteFast
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; The TS_BASE_TILE_DISP routines will come from this table when ENGINE_MODE_TWO_LAYER and
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; ENGINE_MODE_DYN_TILES are both off.
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FastTileProcs dw _TBCopyDataFast,_TBCopyDataFast,_TBCopyDataFast,_TBCopyDataFast
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; dw _TBCopyDataFast,_TBCopyDataFast,_TBCopyDataVFast,_TBCopyDataVFast
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FastTileProcs dw _TBCopyDataFast,_TBCopyDataFast,_TBCopyDataVFast,_TBCopyDataVFast
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FastTileCopy dw _CopyTileDataToDP2,_CopyTileDataToDP2,_CopyTileDataToDP2V,_CopyTileDataToDP2V
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FastSpriteSub dw FastSpriteOver,FastSpriteUnder
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; Need to determine if the sprite or tile data is on top, as that will decide whether the
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; sprite or tile data is copied into the temporary buffer first. Also, if TWO_LAYER is set
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; then the mask information must be copied as well....This is the last decision point.
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SpriteDispatch
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; jmp (K_TS_SPRITE_TILE_DISP,x)
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jmp (K_TS_SPRITE_TILE_DISP,x)
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FastSpriteOver
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txy
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SpriteBitsToVBuffAddrs OneSpriteFastUnder;TwoSpritesFast;ThreeSpritesFast;FourSpritesFast
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SpriteBitsToVBuffAddrs OneSpriteFast;TwoSpritesFast;ThreeSpritesFast;FourSpritesFast
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FastSpriteUnder
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txy
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SpriteBitsToVBuffAddrs OneSpriteFastUnder;OneSpriteFastUnder;OneSpriteFastUnder;OneSpriteFastUnder
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; This handles sprite with the tile above
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OneSpriteFastUnder
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@ -82,13 +87,18 @@ _CopySpriteDataToDP2
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; Y = tile store address
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OneSpriteFast
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sta sprite_ptr0
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ldx TileStore+TS_TILE_ADDR,y
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jsr _CopyTileDataToDP2 ; preserves Y
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lda TileStore+TS_CODE_ADDR_HIGH,y ; load the bank of the target code field line
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tyx
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ldy TileStore+TS_TILE_ADDR,x
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pei DP2_TILEDATA_AND_TILESTORE_BANKS
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plb
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jsr (K_TS_COPY_TILE_DATA,x)
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plb
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lda TileStore+TS_CODE_ADDR_HIGH,x ; load the bank of the target code field line
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pha ; and put on the stack for later. Has TileStore bank in high byte.
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ldy TileStore+TS_CODE_ADDR_LOW,x ; load the address of the code field
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ldx sprite_ptr0 ; address of sprite vbuff info
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lda TileStore+TS_CODE_ADDR_LOW,y ; load the address of the code field
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tay
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plb
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]line equ 0
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@ -145,17 +155,7 @@ TwoSpritesFast
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ply ; Pop off CODE_ADDR_LOW
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plb ; Set the CODE_ADDR_HIGH bank
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]line equ 0
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lup 8
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lda tmp_tile_data+{]line*4}
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sta: $0004+{]line*$1000},y
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lda tmp_tile_data+{]line*4}+2
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sta: $0001+{]line*$1000},y
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]line equ ]line+1
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--^
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plb ; Reset to the bank in the top byte of CODE_ADDR_HIGH
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rts
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jmp _CopyDP2ToCodeField
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ThreeSpriteLine mac
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; and [sprite_ptr2],y
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@ -198,17 +198,7 @@ ThreeSpritesFast
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ply ; Pop off CODE_ADDR_LOW
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plb ; Set the CODE_ADDR_HIGH bank
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]line equ 0
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lup 8
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lda tmp_tile_data+{]line*4}
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sta: $0004+{]line*$1000},y
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lda tmp_tile_data+{]line*4}+2
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sta: $0001+{]line*$1000},y
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]line equ ]line+1
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--^
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plb ; Reset to the bank in the top byte of CODE_ADDR_HIGH
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rts
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jmp _CopyDP2ToCodeField
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FourSpriteLine mac
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; and [sprite_ptr3],y
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@ -255,6 +245,9 @@ FourSpritesFast
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ply ; Pop off CODE_ADDR_LOW
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plb ; Set the CODE_ADDR_HIGH bank
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; Fall through
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_CopyDP2ToCodeField
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]line equ 0
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lup 8
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lda tmp_tile_data+{]line*4}
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@ -264,4 +257,4 @@ FourSpritesFast
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]line equ ]line+1
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--^
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plb ; Reset to the bank in the top byte of CODE_ADDR_HIGH
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rts
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rts
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