Apple-2gs-SW/iigs-game-engine
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Fix sprite stamp rendering for 8x16 and 16x8 sprites

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This commit is contained in:
Lucas Scharenbroich 2022-07-21 22:51:25 -05:00
parent 217b1a95f5
commit 3063ab88f9
2 changed files with 63 additions and 14 deletions
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8
src/Defs.s
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@ -208,10 +208,10 @@ TILE_CTRL_MASK equ $FE00
; Sprite constants
SPRITE_HIDE equ $2000
SPRITE_16X16 equ $1800
SPRITE_16X8 equ $1000
SPRITE_8X16 equ $0800
SPRITE_8X8 equ $0000
SPRITE_16X16 equ $1800 ; 16 pixels wide x 16 pixels tall
SPRITE_16X8 equ $1000 ; 16 pixels wide x 8 pixels tall
SPRITE_8X16 equ $0800 ; 8 pixels wide x 16 pixels tall
SPRITE_8X8 equ $0000 ; 8 pixels wide x 8 pixels tall
SPRITE_VFLIP equ $0400
SPRITE_HFLIP equ $0200

69
src/SpriteRender.s
View File

@ -63,10 +63,10 @@ _DrawSpriteStamp
_DrawSprite
jmp (draw_sprite,x)
draw_sprite dw draw_8x8,draw_8x8h,draw_8x8v,draw_8x8hv
dw draw_8x16,draw_8x16h,draw_8x16v,draw_8x16hv
dw draw_16x8,draw_16x8h,draw_16x8v,draw_16x8hv
dw draw_16x16,draw_16x16h,draw_16x16v,draw_16x16hv
draw_sprite dw draw_8x8,draw_8x8h,draw_8x8v,draw_8x8hv ; 8 wide x 8 tall
dw draw_8x16,draw_8x16h,draw_8x16v,draw_8x16hv ; 8 wide x 16 tall
dw draw_16x8,draw_16x8h,draw_16x8v,draw_16x8hv ; 16 wide by 8 tall
dw draw_16x16,draw_16x16h,draw_16x16v,draw_16x16hv ; 16 wide by 16 tall
dw :rtn,:rtn,:rtn,:rtn ; hidden bit is set
dw :rtn,:rtn,:rtn,:rtn
@ -75,17 +75,30 @@ draw_sprite dw draw_8x8,draw_8x8h,draw_8x8v,draw_8x8hv
:rtn rts
draw_8x8
draw_8x8h
tax
jmp _DrawTile8x8
draw_8x8h
tax
clc
tya
adc #64
tay
jmp _DrawTile8x8
draw_8x8v
draw_8x8hv
tax
jmp _DrawTile8x8V
draw_8x8hv
tax
clc
tya
adc #64
tay
jmp _DrawTile8x8V
draw_8x16
draw_8x16h
tax
jsr _DrawTile8x8
clc
@ -97,17 +110,51 @@ draw_8x16h
tay
jmp _DrawTile8x8
draw_8x16v
draw_8x16hv
draw_8x16h
tax
jsr _DrawTile8x8V
clc
tya
adc #64
tay
jsr _DrawTile8x8
clc
txa
adc #{8*SPRITE_PLANE_SPAN}
tax
tya
adc #{128*32} ; 32 tiles to the next vertical one, each tile is 128 bytes
tay
jmp _DrawTile8x8
draw_8x16v
clc
tax
tya
pha
adc #{128*32}
tay
jsr _DrawTile8x8V
clc
txa
adc #{8*SPRITE_PLANE_SPAN}
tax
ply
jmp _DrawTile8x8V
draw_8x16hv
clc
tax
tya
adc #64
pha
adc #{128*32}
tay
jsr _DrawTile8x8V
clc
txa
adc #{8*SPRITE_PLANE_SPAN}
tax
ply
jmp _DrawTile8x8V
draw_16x8
@ -126,6 +173,7 @@ draw_16x8h
clc
tax
tya
adc #64
pha
adc #128
tay
@ -152,6 +200,7 @@ draw_16x8hv
clc
tax
tya
adc #64
pha
adc #128
tay