mirror of
https://github.com/lscharen/iigs-game-engine.git
synced 2025-01-11 20:30:14 +00:00
Set dirty render to the correct direct page and several small cleanups
This commit is contained in:
Lucas Scharenbroich
parent
885feafb39
commit
182ebfd566
@ -115,18 +115,18 @@ OKTOROK_SLOT_4 equ 4
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_GTEUpdateSprite
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; Add 4 octoroks
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pea OKTOROK_ID
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lda OktorokX
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pha
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lda OktorokY
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pha
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pea OKTOROK_SLOT_1
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_GTEAddSprite
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; pea OKTOROK_ID
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; lda OktorokX
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; pha
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; lda OktorokY
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; pha
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; pea OKTOROK_SLOT_1
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; _GTEAddSprite
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pea OKTOROK_SLOT_1
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pea $0000 ; with these flags (h/v flip)
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pea OKTOROK_VBUFF ; and use this stamp
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_GTEUpdateSprite
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; pea OKTOROK_SLOT_1
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; pea $0000 ; with these flags (h/v flip)
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; pea OKTOROK_VBUFF ; and use this stamp
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; _GTEUpdateSprite
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; Draw the initial screen
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@ -166,7 +166,6 @@ EvtLoop
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bne :not_q
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brl Exit
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:not_q
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brl EvtLoop
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cmp #'d'
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bne :not_d
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@ -229,28 +228,28 @@ EvtLoop
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; Based on the frame count, move an oktorok
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jsr _GetVBLTicks
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pha
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and #$0003
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asl
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tax
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; jsr _GetVBLTicks
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; pha
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; and #$0003
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; asl
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; tax
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pla
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and #$007C
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lsr
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tay
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; pla
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; and #$007C
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; lsr
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; tay
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lda OktorokX,x
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clc
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adc OktorokDelta,y
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; lda OktorokX,x
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; clc
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; adc OktorokDelta,y
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phx
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; phx
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ldy OktorokY,x
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tax
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pla
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inc
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inc
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; ldy OktorokY,x
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; tax
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; pla
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; inc
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; inc
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; jsl MoveSprite
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@ -126,9 +126,9 @@ SET_DYN_TILE equ $0006
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CALLBACK equ $0010
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; ReadControl return value bits
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PAD_BUTTON_B equ $01
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PAD_BUTTON_A equ $02
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PAD_KEY_DOWN equ $04
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PAD_BUTTON_B equ $0100
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PAD_BUTTON_A equ $0200
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PAD_KEY_DOWN equ $0400
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ENGINE_MODE_TWO_LAYER equ $0001
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ENGINE_MODE_DYN_TILES equ $0002
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ENGINE_MODE_BNK0_BUFF equ $0004
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@ -271,7 +271,7 @@ _ReadControl pea $0000 ; low byte = key code, high byte
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and #$80
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beq :BNotDown
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lda #PAD_BUTTON_B
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lda #>PAD_BUTTON_B
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ora 2,s
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sta 2,s
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@ -280,7 +280,7 @@ _ReadControl pea $0000 ; low byte = key code, high byte
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and #$80
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beq :ANotDown
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lda #PAD_BUTTON_A
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lda #>PAD_BUTTON_A
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ora 2,s
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sta 2,s
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@ -296,7 +296,7 @@ _ReadControl pea $0000 ; low byte = key code, high byte
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beq :KbdDown
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sta LastKey
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lda #PAD_KEY_DOWN ; set the keydown flag
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lda #>PAD_KEY_DOWN ; set the keydown flag
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ora 2,s
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sta 2,s
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bra :KbdDown
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22
src/Render.s
22
src/Render.s
@ -157,20 +157,27 @@ _ApplyTiles
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; In this renderer, we assume that there is no scrolling, so no need to update any information about
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; the BG0/BG1 positions
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_RenderDirty
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lda LastRender ; If the full renderer was last called, we assume that
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bne :norecalc ; the scroll positions have likely changed, so recalculate
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jsr _RecalcTileScreenAddrs ; them to make sure sprites draw at the correct screen address
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lda LastRender ; If the full renderer was last called, we assume that
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bne :norecalc ; the scroll positions have likely changed, so recalculate
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jsr _RecalcTileScreenAddrs ; them to make sure sprites draw at the correct screen address
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jsr _ResetVisibleTiles ; Switch the tile procs to the dirty tile rendering functions
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; jsr _ClearSpritesFromCodeField ; Restore the tiles to their non-sprite versions
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:norecalc
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; jsr _RenderSprites
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; jsr _ApplyDirtyTiles
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jsr _RenderSprites
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jsr _ApplyDirtyTiles
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lda #1
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sta LastRender
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rts
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_ApplyDirtyTiles
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phd ; save the current direct page
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tdc
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clc
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adc #$100 ; move to the next page
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tcd
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bra :begin
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:loop
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@ -180,13 +187,14 @@ _ApplyDirtyTiles
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; Call the generic dispatch with the Tile Store record pointer at by the Y-register.
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phb
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jsr _RenderDirtyTile
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plb
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; Loop again until the list of dirty tiles is empty
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:begin ldy DirtyTileCount
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bne :loop
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pld ; Move back to the original direct page
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stz DirtyTileCount ; Reset the dirty tile count
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rts
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@ -218,10 +218,6 @@ tmp_out
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mdsOut rts
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; NOTE: The VBuffArray table is set up so that each sprite's vbuff address is stored in a
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; parallel structure to the Tile Store. This allows up to use the same TileStoreLookup
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; offset to index into the array of 16 sprite VBUFF addresses that are bound to a given tile
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_MarkDirtySpriteTiles
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lda _SpriteBits,y
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sta SpriteBit
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124
src/Tiles.s
124
src/Tiles.s
@ -167,49 +167,98 @@ InitTiles
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rts
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; Reset all of the tile proc values in the playfield.
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ResetVisibleTiles
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_ResetVisibleTiles
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:col equ tmp0
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:row equ tmp1
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jsr _OriginToTileStore ; Get the (col,row) of the tile in the upper-left corner of the playfield
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clc
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txa
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adc TileStoreLookupYTable,y ; Get the offset into the Tile Store lookup table
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tay
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pha ; Save for later
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lda ScreenTileHeight
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sta :row
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lda ScreenTileWidth
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sta :col
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:loop
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lda EngineMode
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bit #ENGINE_MODE_DYN_TILES+ENGINE_MODE_TWO_LAYER
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beq :fast
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bit #ENGINE_MODE_TWO_LAYER
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beq :dyn
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; ldal TileProcs
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; sta TileStore+TS_BASE_TILE_DISP,x
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bra :out
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:fast
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lda #0 ; Initialize with Tile 0
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ldy #FastProcs
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phy
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ldx TileStoreLookup,y
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lda TileStore+TS_TILE_ID,x
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jsr _CalcTileProcIndex
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ldy #DirtyProcs
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jsr _SetTileProcs
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bra :out
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:dyn lda #0 ; Initialize with Tile 0
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ldy #FastProcs
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jsr _SetTileProcs
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:out
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; The next set of values are constants that are simply used as cached parameters to avoid needing to
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; calculate any of these values during tile rendering
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ply
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iny
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iny
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dec :col
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bpl :hop
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dec :row
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bpl :loop
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lda ScreenTileWidth
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sta :col
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:hop
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dex
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dex
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lda 1,s ; Move to the next row
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clc
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adc #2*TS_LOOKUP_SPAN
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sta 1,s
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tay
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dec :row
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bpl :loop
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pla ; pop the saved value
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rts
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; Helper method to calculate the index into the tile proc table given a TileID
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; Calculate the base tile proc selector from the tile Id
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_CalcTileProcIndex
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bit #TILE_PRIORITY_BIT ; 4 if !0, 0 otherwise
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beq :low_priority
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bit #TILE_ID_MASK ; 2 if !0, 0 otherwise
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beq :is_zero_a
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bit #TILE_VFLIP_BIT ; 1 if !0, 0 otherwise
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beq :no_flip_a
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lda #7
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rts
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:no_flip_a lda #6
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rts
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:is_zero_a bit #TILE_VFLIP_BIT
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beq :no_flip_b
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lda #5
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rts
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:no_flip_b lda #4
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rts
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:low_priority bit #TILE_ID_MASK ; 2 if !0, 0 otherwise
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beq :is_zero_b
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bit #TILE_VFLIP_BIT ; 1 if !0, 0 otherwise
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beq :no_flip_c
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lda #3
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rts
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:no_flip_c lda #2
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rts
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:is_zero_b bit #TILE_VFLIP_BIT
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beq :no_flip_d
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lda #1
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rts
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:no_flip_d lda #0
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rts
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; Set a tile value in the tile backing store. Mark dirty if the value changes
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@ -254,27 +303,10 @@ _SetTile
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; it can be more involved.
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; Calculate the base tile proc selector from the tile Id
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stz procIdx
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lda #TILE_PRIORITY_BIT
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bit newTileId
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beq :low_priority
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lda #4
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lda newTileId
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jsr _CalcTileProcIndex
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sta procIdx
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:low_priority
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lda #TILE_ID_MASK
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bit newTileId
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beq :is_zero
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lda #2
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tsb procIdx
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:is_zero
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lda #TILE_VFLIP_BIT
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bit newTileId
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beq :no_vflip
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lda #1
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tsb procIdx
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:no_vflip
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; Now integrate with the engine mode indicator
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@ -46,10 +46,10 @@ Counter equ tmp3
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lda (NextColPtr),y ; Need to recalculate each time since the wrap-around could
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clc ; happen anywhere
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adc (RowAddrPtr) ;
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tax ; NOTE: Try to rework to use new TileStore2DLookup array
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tax ; NOTE: Try to rework to use new TileStoreLookup array
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lda OnScreenAddr
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sta TileStore+TS_SCREEN_ADDR,x
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sta TileStore+TS_SCREEN_ADDR,x
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clc
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adc #4 ; Go to the next tile
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@ -116,6 +116,7 @@ DirtySpriteUnder mac
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; Special routine for a single sprite
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OneSpriteDirtyOverA
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ldy TileStore+TS_TILE_ADDR,x
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lda TileStore+TS_SCREEN_ADDR,x
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ldx sprite_ptr0
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