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Checkpoint for initial framing for compiled sprite support
This commit is contained in:
Lucas Scharenbroich
parent
981182592e
commit
e2e30dfcf4
@ -228,13 +228,14 @@ TILE_CTRL_MASK equ $FE00
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; TILE_PROC_MASK equ $F800 ; Select tile proc for rendering
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; Sprite constants
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SPRITE_HIDE equ $2000
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SPRITE_COMPILED equ $4000 ; This is a compiled sprite (SPRITE_DISP points to a routine in the compiled cache bank)
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SPRITE_HIDE equ $2000 ; Do not render the sprite
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SPRITE_16X16 equ $1800 ; 16 pixels wide x 16 pixels tall
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SPRITE_16X8 equ $1000 ; 16 pixels wide x 8 pixels tall
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SPRITE_8X16 equ $0800 ; 8 pixels wide x 16 pixels tall
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SPRITE_8X8 equ $0000 ; 8 pixels wide x 8 pixels tall
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SPRITE_VFLIP equ $0400
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SPRITE_HFLIP equ $0200
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SPRITE_VFLIP equ $0400 ; Flip the sprite vertically
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SPRITE_HFLIP equ $0200 ; Flip the sprite horizontally
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; Stamp storage parameters
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VBUFF_STRIDE_BYTES equ {12*4} ; Each line has 4 slots of 16 pixels + 8 buffer pixels
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57
src/Render.s
57
src/Render.s
@ -341,7 +341,9 @@ _RenderWithShadowing
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; to create priority lists of scanline ranges.
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jsr _BuildShadowList ; Create the rages based on the sorted sprite y-values
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jsr _ComplementList ; Create the complement to identify non-sprite scanlines
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; jsr _MergeOverlay ; Add the overlay range into the shadow list (treat it as a sprite)
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jsr _ComplementList ; Create the complement to identify non-sprite / non-overlay scanlines
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jsr _ShadowOff ; Turn off shadowing and draw all the scanlines with sprites on them
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jsr _DrawShadowList
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@ -496,7 +498,7 @@ _BuildShadowList
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sta _ShadowListTop,y ; Set the top entry of the list to the sprite top
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lda _Sprites+SPRITE_CLIP_BOTTOM,x ; Optimistically set the end of the segment to the bottom of this sprite
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inc
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inc ; Clip values are on the scanline, so add one to make it a proper interval
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:replace
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sta _ShadowListBottom,y
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@ -603,10 +605,22 @@ _DrawDirectSprites
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bmi :empty
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:loop
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lda _Sprites+SPRITE_STATUS,x
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bit #SPRITE_STATUS_HIDDEN
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bne :next
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lda _Sprites+SPRITE_ID,x ; If this is a compiled sprite, call the routine in the compilation bank
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bit #SPRITE_COMPILED
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bne :compiled
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phx
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jsr _DrawStampToScreen
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plx
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bra :next
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:compiled
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:next
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lda _Sprites+SORTED_NEXT,x ; If there another sprite in the list?
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tax
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bpl :loop
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@ -633,6 +647,8 @@ _DrawComplementList
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lda _DirectListTop,x
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ldy _DirectListBottom,x
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tax
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lda #0
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jsr DebugSCBs
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jsr _BltRange
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plx
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@ -646,6 +662,8 @@ _DrawComplementList
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phx
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ldy _DirectListTop,x
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tax
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lda #1
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jsr DebugSCBs
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jsr _PEISlam
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plx
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bra :blt_range
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@ -655,6 +673,41 @@ _DrawComplementList
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bcs :out ; screen, then expose that range
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tax
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ldy ScreenHeight
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lda #1
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jsr DebugSCBs
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jsr _PEISlam
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:out
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rts
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; Helper to set a palette index on a range of SCBs to help show whicih actions are applied to which lines
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DebugSCBs
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phx
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phy
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sep #$30 ; short m/x
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pha ; save the SCB value
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phx
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tya
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sec
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sbc 1,s
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tay ; number of scanlines
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pla
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clc
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adc ScreenY0
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tax ; physical line index
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pla
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:loop
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stal SHR_SCB,x
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inx
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dey
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bne :loop
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rep #$30
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ply
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plx
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rts
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@ -1,7 +1,129 @@
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; Draw a sprite directly to the graphics screen. No clipping / bounds checking is performed
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; Compile a stamp into a compilation cache
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_CompileStamp
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_lines equ tmp0
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_width0 equ tmp1
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_width equ tmp2
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baseAddr equ tmp3
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destAddr equ tmp4
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vbuffAddr equ tmp5
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lda _Sprites+SPRITE_HEIGHT,x
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sta _lines
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lda _Sprites+SPRITE_WIDTH,x ; Width in bytes (4 or 8)
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lsr
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sta
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sta _width0
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lda _Sprites+SPRITE_DISP,x ; Get the address of the stamp
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sta vbuffAddr
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tax
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ldy CompileBankTop ; First free byte in the compilation bank
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phb
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pei CompileBank
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plb
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plb ; Set the bank to the compilation cache
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stz baseAddr
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stz destAddr
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:oloop
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lda _width0
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sta _width
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:iloop
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ldal spritemask,x
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beq :no_mask ; If Mask == $0000, then it's a solid word
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cmp #$FFFF
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beq :next ; If Mask == $FFFF, then it's transparent
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; Mask with the screen data
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lda #LDA_ABS_X_OPCODE
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sta: 0,y
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lda destAddr
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sta: 1,y
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sta: 10,y
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lda #AND_IMM_OPCODE
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sta: 3,y
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ldal spritemask,x
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sta: 4,y
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lda #ORA_IMM_OPCODE
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sta: 6,y
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ldal spritedata,x
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sta: 7,y
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lda #STA_ABS_X_OPCODE
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sta: 9,y
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tya
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adc #12
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tay
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bra :next
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; Just store the data
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:no_mask lda #LDA_IMM_OPCODE
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sta: 0,y
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ldal spritedata,x
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sta: 1,y
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lda #STA_ABS_X_OPCODE
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sta: 3,y
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lda destAddr
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sta: 4,y
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tya
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adc #6
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tay
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:next
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inx
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inx
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inc destAddr ; Move to the next word
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inc destAddr
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dec _width
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bne :iloop
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lda vbuffAddr
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adc #SPRITE_PLANE_SPAN
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sta vbuffAddr
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tax
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lda baseAddr ; Move to the next line
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adc #160
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sta baseAddr
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sta destAddr
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dec lines
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bne :oloop
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lda #RTL_OPCODE ; Finish up the subroutine
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sta: 0,y
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iny
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sty CompileBankTop
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plb
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rts
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; Draw a sprite directly to the graphics screen. If sprite is clipped at all, do not draw.
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;
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; X = sprite record index
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_DSTSOut
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rts
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_DrawStampToScreen
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lda _Sprites+IS_OFF_SCREEN,x ; If the sprite is off-screen, don't draw it
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bne _DSTSOut
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lda _Sprites+SPRITE_CLIP_WIDTH,x ; If the sprite is clipped to the playfield, don't draw it
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cmp _Sprites+SPRITE_WIDTH,x
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bne _DSTSOut
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lda _Sprites+SPRITE_CLIP_HEIGHT,x
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cmp _Sprites+SPRITE_HEIGHT,x
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bne _DSTSOut
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clc
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lda _Sprites+SPRITE_Y,x
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adc ScreenY0
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@ -61,7 +61,7 @@ SPRITE_HEIGHT equ {MAX_SPRITES*28}
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SPRITE_CLIP_WIDTH equ {MAX_SPRITES*30}
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SPRITE_CLIP_HEIGHT equ {MAX_SPRITES*32}
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TS_VBUFF_BASE equ {MAX_SPRITES*34} ; Finalized VBUFF address based on the sprite position and tile offsets
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SORTED_PREV equ {MAX_SPRITES*36}
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SORTED_PREV equ {MAX_SPRITES*36} ; Doubly-Linked List that maintains the sprites in sorted order based on SPRITE_Y
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SORTED_NEXT equ {MAX_SPRITES*38}
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; 52 rows by 82 columns + 2 extra rows and columns for sprite sizes
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