Apple-2gs-SW/iigs-game-engine
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Fix lookup tables to fix boundary rendering

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This commit is contained in:
Lucas Scharenbroich 2022-06-06 20:10:15 -05:00
parent b6202ca44c
commit 2c409b02a7
4 changed files with 43 additions and 34 deletions
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27
src/Sprite.s
View File

@ -19,13 +19,14 @@ InitSprites
cpx #$FFFE
bne :loop2
; Initialize the VBuff offset values for the different cases
; Initialize the VBuff offset values for the different cases. These are locations in
; the TileStoreLookup table, which has different dimensions than the underlying TileStore
; array
TILE_STORE_SPAN equ {TILE_STORE_WIDTH*2}
LAST_ROW equ {TILE_STORE_SPAN*{TILE_STORE_HEIGHT-1}}
NEXT_TO_LAST_ROW equ {TILE_STORE_SPAN*{TILE_STORE_HEIGHT-2}}
LAST_COL equ {TILE_STORE_WIDTH-1}*2
NEXT_TO_LAST_COL equ {TILE_STORE_WIDTH-2}*2
LAST_ROW equ {2*TS_LOOKUP_SPAN*{TILE_STORE_HEIGHT-1}}
NEXT_TO_LAST_ROW equ {2*TS_LOOKUP_SPAN*{TILE_STORE_HEIGHT-2}}
LAST_COL equ {{TILE_STORE_WIDTH-1}*2}
NEXT_TO_LAST_COL equ {{TILE_STORE_WIDTH-2}*2}
lda #0 ; Normal row, Normal column
ldx #0
@ -98,7 +99,7 @@ NEXT_TO_LAST_COL equ {TILE_STORE_WIDTH-2}*2
jsr _CacheSpriteBanks
rts
; Call with X-register set to TileStore tile and Acc set to the VBuff slot offset
; Call with X-register set to TileStore tile and A set to the VBuff slot offset
_SetVBuffValues
COL_BYTES equ 4 ; VBUFF_TILE_COL_BYTES
ROW_BYTES equ 384 ; VBUFF_TILE_ROW_BYTES
@ -121,27 +122,27 @@ ROW_BYTES equ 384 ; VBUFF_TILE_ROW_BYTES
lda #{2*COL_BYTES}+{0*ROW_BYTES}
sta (tmp0),y
ldy TileStoreLookup+1*{TS_LOOKUP_SPAN*2},x
ldy TileStoreLookup+{1*{TS_LOOKUP_SPAN*2}},x
lda #{0*COL_BYTES}+{1*ROW_BYTES}
sta (tmp0),y
ldy TileStoreLookup+1*{TS_LOOKUP_SPAN*2}+2,x
ldy TileStoreLookup+{1*{TS_LOOKUP_SPAN*2}}+2,x
lda #{1*COL_BYTES}+{1*ROW_BYTES}
sta (tmp0),y
ldy TileStoreLookup+1*{TS_LOOKUP_SPAN*2}+4,x
ldy TileStoreLookup+{1*{TS_LOOKUP_SPAN*2}}+4,x
lda #{2*COL_BYTES}+{1*ROW_BYTES}
sta (tmp0),y
ldy TileStoreLookup+2*{TS_LOOKUP_SPAN*2},x
ldy TileStoreLookup+{2*{TS_LOOKUP_SPAN*2}},x
lda #{0*COL_BYTES}+{2*ROW_BYTES}
sta (tmp0),y
ldy TileStoreLookup+2*{TS_LOOKUP_SPAN*2}+2,x
ldy TileStoreLookup+{2*{TS_LOOKUP_SPAN*2}}+2,x
lda #{1*COL_BYTES}+{2*ROW_BYTES}
sta (tmp0),y
ldy TileStoreLookup+2*{TS_LOOKUP_SPAN*2}+4,x
ldy TileStoreLookup+{2*{TS_LOOKUP_SPAN*2}}+4,x
lda #{2*COL_BYTES}+{2*ROW_BYTES}
sta (tmp0),y
rts

6
src/Sprite2.s
View File

@ -113,10 +113,6 @@ _CalcDirtySprite
pha
and #$FFFC
lsr ; Even numbers from [0, 160] (81 elements)
; cmp #TILE_STORE_WIDTH*2
; bcc :x_in_range
; sbc #TILE_STORE_WIDTH*2
;:x_in_range
sta tmp3
adc RowTop
sta _Sprites+TS_LOOKUP_INDEX,y ; This is the index into the TileStoreLookup table
@ -183,7 +179,7 @@ _CalcDirtySprite
; The X-register still has the TileStoreLookupYTable index, which we re-use to get a VBuff
; array selector for the vertical location
lda VBuffVertTableSelect,x ; A bunch of 12, 24 or 36 values
lda VBuffVertTableSelect,x ; A bunch of 0, 12 or 24 values
clc
ldx tmp3
adc VBuffHorzTableSelect,x ; A bunch of 0, 4 or 8 values

18
src/static/TileStore.s
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@ -470,10 +470,22 @@ ScreenModeHeight ENT
; The eighth block is (X = N-1, Y = M-2)
; The ninth block is (X = N-2, Y = M-2)
VBuffVertTableSelect ENT
ds 51*2
VBuffVertTableSelect ENT ; 51 entries
dw 0,0,0,0,0,0,0,0,0,0
dw 0,0,0,0,0,0,0,0,0,0
dw 0,0,0,0,48,24
dw 0,0,0,0,0,0,0,0,0,0
dw 0,0,0,0,0,0,0,0,0,0
dw 0,0,0,0,48,24
VBuffHorzTableSelect ENT
ds 81*2
dw 0,0,0,0,0,0,0,0,0,0
dw 0,0,0,0,0,0,0,0,0,0
dw 0,0,0,0,0,0,0,0,0,0
dw 0,0,0,0,0,0,0,0,0,16,8
dw 0,0,0,0,0,0,0,0,0,0
dw 0,0,0,0,0,0,0,0,0,0
dw 0,0,0,0,0,0,0,0,0,0
dw 0,0,0,0,0,0,0,0,0,16,8
VBuffStart ds TILE_STORE_SIZE
VBuffArray ENT

26
src/static/TileStoreDefs.s
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@ -5,20 +5,20 @@ TILE_STORE_HEIGHT equ 26
MAX_TILES equ {26*41} ; Number of tiles in the code field (41 columns * 26 rows)
TILE_STORE_SIZE equ {MAX_TILES*2} ; The tile store contains a tile descriptor in each slot
TS_TILE_ID equ TILE_STORE_SIZE*0 ; tile descriptor for this location
TS_DIRTY equ TILE_STORE_SIZE*1 ; Flag. Used to prevent a tile from being queued multiple times per frame
TS_SPRITE_FLAG equ TILE_STORE_SIZE*2 ; Bitfield of all sprites that intersect this tile. 0 if no sprites.
TS_TILE_ADDR equ TILE_STORE_SIZE*3 ; cached value, the address of the tiledata for this tile
TS_CODE_ADDR_LOW equ TILE_STORE_SIZE*4 ; const value, address of this tile in the code fields
TS_CODE_ADDR_HIGH equ TILE_STORE_SIZE*5
TS_WORD_OFFSET equ TILE_STORE_SIZE*6 ; const value, word offset value for this tile if LDA (dp),y instructions re used
TS_BASE_ADDR equ TILE_STORE_SIZE*7 ; const value, because there are two rows of tiles per bank, this is set to $0000 ot $8000.
TS_SCREEN_ADDR equ TILE_STORE_SIZE*8 ; cached value of on-screen location of tile. Used for DirtyRender.
TS_TILE_ID equ {TILE_STORE_SIZE*0} ; tile descriptor for this location
TS_DIRTY equ {TILE_STORE_SIZE*1} ; Flag. Used to prevent a tile from being queued multiple times per frame
TS_SPRITE_FLAG equ {TILE_STORE_SIZE*2} ; Bitfield of all sprites that intersect this tile. 0 if no sprites.
TS_TILE_ADDR equ {TILE_STORE_SIZE*3} ; cached value, the address of the tiledata for this tile
TS_CODE_ADDR_LOW equ {TILE_STORE_SIZE*4} ; const value, address of this tile in the code fields
TS_CODE_ADDR_HIGH equ {TILE_STORE_SIZE*5}
TS_WORD_OFFSET equ {TILE_STORE_SIZE*6} ; const value, word offset value for this tile if LDA (dp),y instructions re used
TS_BASE_ADDR equ {TILE_STORE_SIZE*7} ; const value, because there are two rows of tiles per bank, this is set to $0000 ot $8000.
TS_SCREEN_ADDR equ {TILE_STORE_SIZE*8} ; cached value of on-screen location of tile. Used for DirtyRender.
; TODO: Move these arrays into the K bank to support direct dispatch via jmp (abs,x)
TS_BASE_TILE_COPY equ TILE_STORE_SIZE*9 ; derived from TS_TILE_ID to optimize tile copy to support sprite rendering
TS_BASE_TILE_DISP equ TILE_STORE_SIZE*10 ; derived from TS_TILE_ID to optimize base (non-sprite) tile dispatch in the Render function
TS_DIRTY_TILE_DISP equ TILE_STORE_SIZE*11 ; derived from TS_TILE_ID to optimize dirty tile dispatch in the Render function
TS_BASE_TILE_COPY equ {TILE_STORE_SIZE*9} ; derived from TS_TILE_ID to optimize tile copy to support sprite rendering
TS_BASE_TILE_DISP equ {TILE_STORE_SIZE*10} ; derived from TS_TILE_ID to optimize base (non-sprite) tile dispatch in the Render function
TS_DIRTY_TILE_DISP equ {TILE_STORE_SIZE*11} ; derived from TS_TILE_ID to optimize dirty tile dispatch in the Render function
TILE_STORE_NUM equ 12 ; Need this many parallel arrays
@ -91,7 +91,7 @@ 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
; Blitter template constants
PER_TILE_SIZE equ 3
SNIPPET_SIZE equ 32