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https://github.com/lscharen/iigs-game-engine.git
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Add specialized erase routines for different sprite sizes
This commit is contained in:
Lucas Scharenbroich
parent
d3b61f8de6
commit
525f6d9c67
162
src/Sprite.s
162
src/Sprite.s
@ -133,16 +133,9 @@ _ClearSpriteFromTileStore
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; drawn in the next phase (since a portion of their content may have been erased if they overlap)
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;
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; In the second phase, the sprite is re-drawn into the sprite plane buffers and the appropriate
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<<<<<<< HEAD
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; Tile Store locations are marked as dirty
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;
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; IF a sprite is marked as FREE, it is transitioned to a free slot after being erased from the
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; the scene and its slot index is returned to the open list.
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=======
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; Tile Store locations are marked as dirty. It is important to recognize that the sprites themselves
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; can be marked dirty, and the underlying tiles in the tile store are independently marked dirty.
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>>>>>>> toolbox-conversion
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forceSpriteFlag ds 2
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_RenderSprites
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@ -305,48 +298,19 @@ _EraseSpriteY
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erase_8x8
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ldx _Sprites+OLD_VBUFF_ADDR,y
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jmp _EraseTileSprite ; erase from the old position
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jmp _EraseTileSprite8x8 ; erase from the old position
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erase_8x16
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clc
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ldx _Sprites+OLD_VBUFF_ADDR,y
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jsr _EraseTileSprite
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txa
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adc #{8*SPRITE_PLANE_SPAN}
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tax
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jmp _EraseTileSprite
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jmp _EraseTileSprite8x16
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erase_16x8
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clc
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ldx _Sprites+OLD_VBUFF_ADDR,y
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jsr _EraseTileSprite
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txa
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adc #4
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tax
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jmp _EraseTileSprite
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jmp _EraseTileSprite16x8
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erase_16x16
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clc
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ldx _Sprites+OLD_VBUFF_ADDR,y
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jmp _EraseTileSprite16x16
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; jsr _EraseTileSprite
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txa
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adc #4
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tax
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jsr _EraseTileSprite
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txa
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adc #{8*SPRITE_PLANE_SPAN}-4
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tax
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jsr _EraseTileSprite
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txa
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adc #4
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tax
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jmp _EraseTileSprite
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; X = _Sprites array offset
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_DrawSprite
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@ -770,49 +734,82 @@ _CacheSpriteBanks
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SPRITE_PLANE_SPAN equ 256
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_EraseTileSprite
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; X = bank address
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_EraseTileSprite8x8
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phb ; Save the bank to switch to the sprite plane
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pei SpriteBanks
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plb ; pop the data bank (low byte)
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lda #0
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sta: {0*SPRITE_PLANE_SPAN}+0,x
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sta: {0*SPRITE_PLANE_SPAN}+2,x
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sta: {1*SPRITE_PLANE_SPAN}+0,x
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sta: {1*SPRITE_PLANE_SPAN}+2,x
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sta: {2*SPRITE_PLANE_SPAN}+0,x
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sta: {2*SPRITE_PLANE_SPAN}+2,x
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sta: {3*SPRITE_PLANE_SPAN}+0,x
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sta: {3*SPRITE_PLANE_SPAN}+2,x
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sta: {4*SPRITE_PLANE_SPAN}+0,x
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sta: {4*SPRITE_PLANE_SPAN}+2,x
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sta: {5*SPRITE_PLANE_SPAN}+0,x
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sta: {5*SPRITE_PLANE_SPAN}+2,x
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sta: {6*SPRITE_PLANE_SPAN}+0,x
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sta: {6*SPRITE_PLANE_SPAN}+2,x
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sta: {7*SPRITE_PLANE_SPAN}+0,x
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sta: {7*SPRITE_PLANE_SPAN}+2,x
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]line equ 0
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lup 8
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stz: {]line*SPRITE_PLANE_SPAN}+0,x
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stz: {]line*SPRITE_PLANE_SPAN}+2,x
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]line equ ]line+1
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--^
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plb ; pop the mask bank (high byte)
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lda #$FFFF
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sta: {0*SPRITE_PLANE_SPAN}+0,x
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sta: {0*SPRITE_PLANE_SPAN}+2,x
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sta: {1*SPRITE_PLANE_SPAN}+0,x
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sta: {1*SPRITE_PLANE_SPAN}+2,x
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sta: {2*SPRITE_PLANE_SPAN}+0,x
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sta: {2*SPRITE_PLANE_SPAN}+2,x
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sta: {3*SPRITE_PLANE_SPAN}+0,x
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sta: {3*SPRITE_PLANE_SPAN}+2,x
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sta: {4*SPRITE_PLANE_SPAN}+0,x
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sta: {4*SPRITE_PLANE_SPAN}+2,x
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sta: {5*SPRITE_PLANE_SPAN}+0,x
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sta: {5*SPRITE_PLANE_SPAN}+2,x
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sta: {6*SPRITE_PLANE_SPAN}+0,x
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sta: {6*SPRITE_PLANE_SPAN}+2,x
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sta: {7*SPRITE_PLANE_SPAN}+0,x
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sta: {7*SPRITE_PLANE_SPAN}+2,x
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]line equ 0
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lup 8
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sta: {]line*SPRITE_PLANE_SPAN}+0,x
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sta: {]line*SPRITE_PLANE_SPAN}+2,x
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]line equ ]line+1
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--^
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plb
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rts
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_EraseTileSprite8x16
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phb ; Save the bank to switch to the sprite plane
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pei SpriteBanks
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plb ; pop the data bank (low byte)
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]line equ 0
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lup 16
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stz: {]line*SPRITE_PLANE_SPAN}+0,x
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stz: {]line*SPRITE_PLANE_SPAN}+2,x
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]line equ ]line+1
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--^
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plb ; pop the mask bank (high byte)
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lda #$FFFF
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]line equ 0
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lup 16
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sta: {]line*SPRITE_PLANE_SPAN}+0,x
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sta: {]line*SPRITE_PLANE_SPAN}+2,x
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]line equ ]line+1
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--^
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plb
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rts
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_EraseTileSprite16x8
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phb ; Save the bank to switch to the sprite plane
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pei SpriteBanks
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plb ; pop the data bank (low byte)
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]line equ 0
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lup 8
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stz: {]line*SPRITE_PLANE_SPAN}+0,x
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stz: {]line*SPRITE_PLANE_SPAN}+2,x
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stz: {]line*SPRITE_PLANE_SPAN}+4,x
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stz: {]line*SPRITE_PLANE_SPAN}+6,x
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]line equ ]line+1
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--^
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plb ; pop the mask bank (high byte)
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lda #$FFFF
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]line equ 0
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lup 8
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sta: {]line*SPRITE_PLANE_SPAN}+0,x
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sta: {]line*SPRITE_PLANE_SPAN}+2,x
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sta: {]line*SPRITE_PLANE_SPAN}+4,x
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sta: {]line*SPRITE_PLANE_SPAN}+6,x
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]line equ ]line+1
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--^
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plb
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rts
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@ -820,21 +817,19 @@ _EraseTileSprite
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_EraseTileSprite16x16
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phb ; Save the bank to switch to the sprite plane
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pea #^spritedata
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plb
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pei SpriteBanks
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plb ; pop the data bank (low byte)
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lda #0
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]line equ 0
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lup 16
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sta: {]line*SPRITE_PLANE_SPAN}+0,x
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sta: {]line*SPRITE_PLANE_SPAN}+2,x
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sta: {]line*SPRITE_PLANE_SPAN}+4,x
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sta: {]line*SPRITE_PLANE_SPAN}+6,x
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stz: {]line*SPRITE_PLANE_SPAN}+0,x
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stz: {]line*SPRITE_PLANE_SPAN}+2,x
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stz: {]line*SPRITE_PLANE_SPAN}+4,x
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stz: {]line*SPRITE_PLANE_SPAN}+6,x
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]line equ ]line+1
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--^
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pea #^spritemask
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plb
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plb ; pop the mask bank (high byte)
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lda #$FFFF
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]line equ 0
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@ -846,7 +841,6 @@ _EraseTileSprite16x16
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]line equ ]line+1
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--^
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pla
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plb
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rts
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