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https://github.com/lscharen/iigs-game-engine.git
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Fix initialization bug in TileStore
This commit is contained in:
Lucas Scharenbroich
parent
b022162036
commit
a938639c1b
@ -39,6 +39,19 @@ ScreenY equ 2
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pea #TSZelda
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_GTELoadTileSet
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; Set the palette
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ldx #11*2
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:ploop
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lda palette,x
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stal $E19E00,x
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dex
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dex
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bpl :ploop
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bra sprt
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palette dw $0000,$08C1,$0C41,$0F93,$0777,$0FDA,$00A0,$0000,$0D20,$0FFF,$023E
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sprt
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; Create stamps for the sprites we are going to use
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HERO_SPRITE_1 equ SPRITE_16X16+1
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HERO_SLOT equ 0
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@ -49,8 +62,8 @@ HERO_SLOT equ 0
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; Create sprites
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pea HERO_SPRITE_1 ; sprite id
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pea #0 ; screen x-position (<256)
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pea #0 ; screen y-position (<256)
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pea #11 ; screen x-position (<256)
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pea #23 ; screen y-position (<256)
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pea HERO_SLOT ; sprite slot (0 - 15)
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_GTEAddSprite
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@ -59,44 +72,62 @@ HERO_SLOT equ 0
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pea VBUFF_SPRITE_START ; and use this stamp
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_GTEUpdateSprite
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; Manually fill in the 41x26 tiles of the TileStore with a test pattern.
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; Manually fill in the 41x26 tiles of the TileStore with a test pattern of trees
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;
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; Tile 65 Tile 66
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; Tile 97 Tile 98
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ldx #0
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ldy #0
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stz 0 ; X
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stz 2 ; Y
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:loop
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phx
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phy
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:tloop
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ldx 0
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ldy 2
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phx
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phy
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lda 0
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clc
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adc #64
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pha
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pea #65
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inx
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phx
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phy
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pea #66
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iny
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phx
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phy
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pea #98
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dex
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phx
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phy
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pea #97
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_GTESetTile
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_GTESetTile
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_GTESetTile
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_GTESetTile
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lda 0
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inc
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and #$001F
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inc
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sta 0
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cmp #40
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bcc :tloop
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ply
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plx
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inx
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cpx #41
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bcc :loop
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stz 0
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lda 2
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inc
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inc
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sta 2
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cmp #25
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bcc :tloop
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ldx #0
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iny
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cpy #26
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bcc :loop
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; Set the screen coordinates
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; Set the origin of the screen
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:skip
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stz ScreenX
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stz ScreenY
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lda #8
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sta ScreenX
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sta ScreenY
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; Very simple actions
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:evt_loop
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@ -138,6 +169,7 @@ HERO_SLOT equ 0
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; _GTEUpdateSprite
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_GTERender
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brl :evt_loop
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; Debug stuff
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ldx #$100
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@ -174,7 +174,7 @@ _DoPhase1
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bit #SPRITE_STATUS_MOVED
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beq :no_move
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; jsr _ClearSpriteFromTileStore
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jsr _ClearSpriteFromTileStore
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ldy tmpY
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; Anything else (MOVED, UPDATED, ADDED) will need to have the VBUFF information updated and the
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31
src/Tiles.s
31
src/Tiles.s
@ -80,20 +80,7 @@ InitTiles
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:row equ tmp1
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:vbuff equ tmp2
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; Fill in the TileStoreYTable. This is just a table of offsets into the Tile Store for each row. There
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; are 26 rows with a stride of 41
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ldy #0
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lda #0
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:yloop
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sta TileStoreYTable,y
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clc
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adc #41*2
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iny
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iny
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cpy #26*2
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bcc :yloop
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; Next, initialize the Tile Store itself
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; Initialize the Tile Store
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ldx #TILE_STORE_SIZE-2
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lda #25
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@ -105,7 +92,7 @@ InitTiles
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:loop
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; The first set of values in the Tile Store are changed during each frame based on the actions
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; The first set of values in the Tile Store that are changed during each frame based on the actions
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; that are happening
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lda #0
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@ -114,12 +101,26 @@ InitTiles
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sta TileStore+TS_SPRITE_FLAG,x ; no sprites are set at the beginning
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sta TileStore+TS_DIRTY,x ; none of the tiles are dirty
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; Set the default tile rendering functions
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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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; ldal TileProcs
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; sta TileStore+TS_BASE_TILE_DISP,x
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bra :out
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:fast
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ldal FastTileProcs
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sta TileStore+TS_BASE_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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; stal TileStore+TS_DIRTY_TILE_DISP,x
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;
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; lda TileProcs ; Same for non-dirty, non-sprite base case
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; stal TileStore+TS_BASE_TILE_DISP,x
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; The next set of values are constants that are simply used as cached parameters to avoid needing to
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; calculate any of these values during tile rendering
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@ -14,6 +14,8 @@ TS_CODE_ADDR_HIGH equ TILE_STORE_SIZE*5
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TS_WORD_OFFSET equ TILE_STORE_SIZE*6 ; const value, word offset value for this tile if LDA (dp),y instructions re used
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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.
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TS_SCREEN_ADDR equ TILE_STORE_SIZE*8 ; cached value of on-screen location of tile. Used for DirtyRender.
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; TODO: Move these arrays into the K bank to support direct dispatch via jmp (abs,x)
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TS_BASE_TILE_COPY equ TILE_STORE_SIZE*9 ; derived from TS_TILE_ID to optimize tile copy to support sprite rendering
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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
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TS_DIRTY_TILE_DISP equ TILE_STORE_SIZE*11 ; derived from TS_TILE_ID to optimize dirty tile dispatch in the Render function
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@ -43,9 +45,9 @@ SPRITE_STATUS equ {MAX_SPRITES*0}
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SPRITE_ID equ {MAX_SPRITES*2}
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SPRITE_X equ {MAX_SPRITES*4}
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SPRITE_Y equ {MAX_SPRITES*6}
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VBUFF_ADDR equ {MAX_SPRITES*8} ; Base address of the sprite's stamp in the data/mask banks
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; These values are cached / calculated during the rendering process
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VBUFF_ADDR equ {MAX_SPRITES*8} ; Base address of the sprite's stamp in the data/mask banks
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TS_LOOKUP_INDEX equ {MAX_SPRITES*10} ; The index from the TileStoreLookup table that corresponds to the top-left corner of the sprite
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TS_COVERAGE_SIZE equ {MAX_SPRITES*12} ; Representation of how many TileStore tiles (NxM) are covered by this sprite
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OLD_TS_LOOKUP_INDEX equ {MAX_SPRITES*14} ; Copy of the values to support diffing
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