89 lines
3.7 KiB
ArmAsm
89 lines
3.7 KiB
ArmAsm
; _TBMaskedSpriteTile
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;
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; Renders a composited tile with masking to the code field.
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_TBMaskedSpriteTile_00
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_TBMaskedSpriteTile_0H
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sta _X_REG ; Immedately stash the parameters
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sty _Y_REG
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jsr _TBCopyTileDataToCBuff ; Copy the tile data into the compositing buffer (using correct x-register)
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jsr _TBCopyTileMaskToCBuff ; Copy the tile mask into the compositing buffer (using correct x-register)
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jsr _TBMergeSpriteDataAndMask ; Overlay the data and mask from the sprite plane into the compositing buffer
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jmp _TBMaskedCBuff ; Render the masked tile from the compositing buffer into the code field
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;_TBMaskedSpriteTile_0H
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; sta _X_REG
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; sty _Y_REG
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; jsr _TBCopyTileDataToCBuffH
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; jsr _TBCopyTileMaskToCBuffH
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; jsr _TBMergeSpriteDataAndMask
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; jmp _TBMaskedCBuff
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_TBMaskedSpriteTile_V0
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_TBMaskedSpriteTile_VH
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sta _X_REG
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sty _Y_REG
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jsr _TBCopyTileDataToCBuffV
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jsr _TBCopyTileMaskToCBuffV
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jsr _TBMergeSpriteDataAndMask
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jmp _TBMaskedCBuff
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;_TBMaskedSpriteTile_VH
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; sta _X_REG
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; sty _Y_REG
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; jsr _TBCopyTileDataToCBuffVH
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; jsr _TBCopyTileMaskToCBuffVH
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; jsr _TBMergeSpriteDataAndMask
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; jmp _TBMaskedCBuff
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_TBMergeSpriteDataAndMask
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ldx _SPR_X_REG ; set to the unaligned tile block address in the sprite plane
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]line equ 0
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lup 8
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lda blttmp+{]line*4}
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andl spritemask+{]line*SPRITE_PLANE_SPAN},x
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oral spritedata+{]line*SPRITE_PLANE_SPAN},x
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sta blttmp+{]line*4}
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ldal spritemask+{]line*SPRITE_PLANE_SPAN},x
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and blttmp+{]line*4}+32
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sta blttmp+{]line*4}+32
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lda blttmp+{]line*4}+2
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andl spritemask+{]line*SPRITE_PLANE_SPAN}+2,x
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oral spritedata+{]line*SPRITE_PLANE_SPAN}+2,x
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sta blttmp+{]line*4}+2
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ldal spritemask+{]line*SPRITE_PLANE_SPAN}+2,x
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and blttmp+{]line*4}+32+2
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sta blttmp+{]line*4}+32+2
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]line equ ]line+1
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--^
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rts
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; See the Tiles00010.s blitter for additional details
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_TBMaskedCBuff
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CopyMaskedWordD blttmp+0;$0003
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CopyMaskedWordD blttmp+4;$1003
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CopyMaskedWordD blttmp+8;$2003
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CopyMaskedWordD blttmp+12;$3003
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CopyMaskedWordD blttmp+16;$4003
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CopyMaskedWordD blttmp+20;$5003
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CopyMaskedWordD blttmp+24;$6003
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CopyMaskedWordD blttmp+28;$7003
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inc _X_REG
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inc _X_REG
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CopyMaskedWordD blttmp+2;$0000
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CopyMaskedWordD blttmp+6;$1000
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CopyMaskedWordD blttmp+10;$2000
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CopyMaskedWordD blttmp+14;$3000
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CopyMaskedWordD blttmp+18;$4000
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CopyMaskedWordD blttmp+22;$5000
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CopyMaskedWordD blttmp+26;$6000
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CopyMaskedWordD blttmp+30;$7000
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rts
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