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79 lines
1.8 KiB
Plaintext
79 lines
1.8 KiB
Plaintext
;
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; global.macros
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; BuGS
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;
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; Created by Jeremy Rand on 2020-07-30.
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;Copyright © 2020 Jeremy Rand. All rights reserved.
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;
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; This macro uses the Y register as an index into the tile offsets. This is
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; needed for segments because each segment has their own dirty tile offsets.
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macro
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_dirtyGameTile &tileOffset
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ldx &tileOffset,y
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lda tileDirty,x
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bne _dirtyGameTile_skip&SYSCNT
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lda #TILE_STATE_DIRTY
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sta tileDirty,x
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txa
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ldx numDirtyGameTiles
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sta dirtyGameTiles,x
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inx
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inx
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stx numDirtyGameTiles
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_dirtyGameTile_skip&SYSCNT anop
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mend
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; Call this with Y already loaded with the numDirtyGameTiles. Also, the new
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; numDirtyGameTiles is left in Y. The caller must store it.
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macro
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_dirtyGameTileWithY &tileOffset
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ldx &tileOffset
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lda tileDirty,x
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bne _dirtyGameTileWithY_skip&SYSCNT
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lda #TILE_STATE_DIRTY
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sta tileDirty,x
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txa
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sta dirtyGameTiles,y
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iny
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iny
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_dirtyGameTileWithY_skip&SYSCNT anop
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mend
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macro
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_dirtyGameOrNonGameTile &tileOffset
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ldx &tileOffset
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lda tileDirty,x
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bne _dirtyGameTile_skip&SYSCNT
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lda #TILE_STATE_DIRTY
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sta tileDirty,x
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txa
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cmp #RHS_FIRST_TILE_OFFSET
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bge _dirtyGameTile_nonGame&SYSCNT
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ldy numDirtyGameTiles
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sta dirtyGameTiles,y
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iny
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iny
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sty numDirtyGameTiles
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bra _dirtyGameTile_skip&SYSCNT
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_dirtyGameTile_nonGame&SYSCNT anop
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ldy numDirtyNonGameTiles
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sta dirtyNonGameTiles,y
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iny
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iny
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sty numDirtyNonGameTiles
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_dirtyGameTile_skip&SYSCNT anop
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mend
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