Apple-2gs-SW/iigs-game-engine
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PRoperly initialize Lookup tables

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This commit is contained in:
Lucas Scharenbroich 2022-05-31 13:01:09 -05:00
parent 10d6dc5931
commit bba8929db7
2 changed files with 34 additions and 8 deletions
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31
src/static/TileStore.s
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@ -36,10 +36,35 @@ _Sprites ENT
; can be looked up by adding a constant value.
ds \,$00 ; pad to the next page boundary
TileStoreLookupYTable ENT
ds {TS_LOOKUP_HEIGHT*2}
TileStoreLookup ENT
ds {TS_LOOKUP_SPAN*TS_LOOKUP_ROWS*2}
]line equ 0
lup TS_LOOKUP_HEIGHT
dw ]line
]line equ ]line+{2*TS_LOOKUP_SPAN}
--^
; Width of tile store is 41 elements
TileStoreData mac
dw ]1+0,]1+2,]1+4,]1+6,]1+8,]1+10,]1+12,]1+14
dw ]1+16,]1+18,]1+20,]1+22,]1+24,]1+26,]1+28,]1+30
dw ]1+32,]1+34,]1+36,]1+38,]1+40,]1+42,]1+44,]1+46
dw ]1+48,]1+50,]1+52,]1+54,]1+56,]1+58,]1+60,]1+62
dw ]1+64,]1+66,]1+68,]1+70,]1+72,]1+74,]1+76,]1+78
dw ]1+80
<<<
; Create a lookup table with two runs of offsets, plus an overlap area on the end (41+41+1 = 83 = TS_LOOKUP_SPAN)
TileStoreLookup ENT
]row equ 0
lup TILE_STORE_HEIGHT
TileStoreData ]row*2*TILE_STORE_WIDTH
TileStoreData ]row*2*TILE_STORE_WIDTH
dw ]row*2*TILE_STORE_WIDTH
]row equ ]row+1
--^
; ds {TS_LOOKUP_SPAN*TS_LOOKUP_ROWS*2}
;
;TILE_STORE_WIDTH equ 41
;TILE_STORE_HEIGHT equ 26
;-------------------------------------------------------------------------------------
;
; Other data tables

11
src/static/TileStoreDefs.s
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@ -75,11 +75,12 @@ VBUFF_ARRAY_ADDR equ {MAX_SPRITES*40} ; Fixed address where this spri
;TILE_STORE_ADDR_9 equ {MAX_SPRITES*28}
;TILE_STORE_ADDR_10 equ {MAX_SPRITES*30}
; 50 rows by 80 columns + 2 extra rows and columns
TS_LOOKUP_WIDTH equ 80
TS_LOOKUP_HEIGHT equ 50
TS_LOOKUP_SPAN equ {TS_LOOKUP_WIDTH+2}
TS_LOOKUP_ROWS equ {TS_LOOKUP_HEIGHT+2}
; 51 rows by 81 columns + 2 extra rows and columns for sprite sizes
TS_LOOKUP_WIDTH equ 81
TS_LOOKUP_HEIGHT equ 51
TS_LOOKUP_BORDER equ 2
TS_LOOKUP_SPAN equ {TS_LOOKUP_WIDTH+TS_LOOKUP_BORDER}
TS_LOOKUP_ROWS equ {TS_LOOKUP_HEIGHT+TS_LOOKUP_BORDER}
; Blitter template constancts
PER_TILE_SIZE equ 3