mirror of
https://github.com/lscharen/iigs-game-engine.git
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Start work on sprite attribute caching
This commit is contained in:
Lucas Scharenbroich
parent
4d7ff46250
commit
89ea425043
@ -1,10 +1,12 @@
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; IIgs Game Engine
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; IIgs Shooter
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TYP $B3 ; S16 file
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DSK GTEPacMan
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DSK GTEShooter
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XPL
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; Segment #1 -- Main execution block
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ASM Main.s
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61
demos/smb/App.s
Normal file
61
demos/smb/App.s
Normal file
@ -0,0 +1,61 @@
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; IIgs Game Engine
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TYP $B3 ; S16 file
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DSK GTETestApp
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XPL
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; Segment #1 -- Main execution block
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ASM Main.s
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; Segment #2 -- ROM
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ASM rom.s
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4
demos/smb/Main.s
Normal file
4
demos/smb/Main.s
Normal file
@ -0,0 +1,4 @@
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REL
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DSK MAINSEG
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rtl
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16381
demos/smb/rom.s
Normal file
16381
demos/smb/rom.s
Normal file
File diff suppressed because it is too large
Load Diff
12
demos/smb/wrapper.s
Normal file
12
demos/smb/wrapper.s
Normal file
@ -0,0 +1,12 @@
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; Wrapper around the SMB ROM code. This takes care of setting any memory locations
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; in the SMB ROM address space that interact with the system (like controller inputs).
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;
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; We also shim many of the LDA/STA instruction that modify the NES I/O to be
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; JSRs to small subroutines that enqueue any changes that are handled once
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; control returns. The queues are important, because we try to run the game
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; logic at 60 fps, but the screen will update significantly slower than that.
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;
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; By queuing the changes, we can "catch up" to the game logic and prioritize
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; audio output at 60 fps since audio stutter is much more disruptive that slow
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; FPS.
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@ -208,7 +208,7 @@ App_TileMapBG0
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dw $1021,$1021,$1031,$1032,$1021,$1021,$100f,$0010,$0011,$1012,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$100f,$0010,$0011,$1012,$1021,$1021,$0007,$0008,$0007,$0008,$0007,$0008,$0007,$0008,$0007,$0008,$0007,$0008,$0007,$0008,$0007,$0008,$1021,$1021,$1021,$1021
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dw $1021,$1021,$1030,$0015,$0015,$0015,$0015,$1033,$1021,$1021,$1021,$1021,$1009,$100a,$1021,$1021,$1021,$1021,$1021,$1021,$001a,$001a,$001a,$001a,$0040,$0040,$001a,$001a,$001a,$001a,$1021,$1021
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dw $1021,$1030,$0015,$0036,$0015,$0015,$0036,$0015,$1033,$1021,$1800,$1804,$0800,$0804,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1022,$1023,$1022,$1023,$1022,$1023,$1021,$1021,$1021,$1030,$0015,$0036,$1230,$1021,$1021,$1057,$1056,$1057,$1056,$1057,$1056,$1057,$1056,$1021,$1022,$1023,$1021,$1021,$1057,$1056,$1057,$1056,$1013,$0014,$0015,$1016,$1021,$1021,$1021,$1021
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dw $1021,$1030,$0015,$0036,$0015,$0015,$0036,$0015,$1033,$1021,$1800,$1804,$0800,$0804,$5800,$5804,$4800,$4804,$1021,$1021,$1021,$1021,$1021,$1021,$1022,$1023,$1022,$1023,$1022,$1023,$1021,$1021,$1021,$1030,$0015,$0036,$1230,$1021,$1021,$5057,$5056,$5057,$5056,$1057,$1056,$1057,$1056,$1021,$1022,$1023,$1021,$1021,$1057,$1056,$1057,$1056,$1013,$0014,$0015,$1016,$1021,$1021,$1021,$1021
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dw $1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1013,$0014,$0015,$1016,$1021,$1021,$1021,$1021,$1022,$1023,$1022,$1023,$1021,$1021,$1021,$1021,$1013,$0014,$0015,$1016,$1021,$1030,$0015,$0036,$0015,$0015,$0036,$0015,$1033,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1013,$0014,$0015,$1016,$1021,$1021,$1022,$1023,$1022,$1023,$1022,$1023,$1021,$1021
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dw $1021,$1030,$0015,$0036,$1033,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1022,$1023,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1022,$1023,$1022,$1023,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021
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dw $1021,$1030,$0015,$0036,$0015,$0015,$0036,$0015,$1033,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1022,$1023,$1022,$1023,$1022,$1023,$1021,$1021,$1021,$1030,$0015,$0036,$1033,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1022,$1023,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021
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@ -216,7 +216,7 @@ App_TileMapBG0
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dw $1021,$1030,$0015,$0036,$1033,$1021,$1013,$0014,$0015,$1016,$1021,$1021,$1021,$1021,$0000,$1021,$1022,$1023,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1013,$0014,$0015,$1016,$0005,$0006,$0005,$0006,$0005,$0006,$0005,$0006,$0005,$0006,$0005,$0006,$0005,$0006,$0005,$0006,$0005,$0006,$1021,$1021,$1021,$1021
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dw $1021,$1030,$0015,$0036,$0015,$0015,$0036,$0015,$1033,$1021,$1021,$1021,$0005,$0006,$1021,$1021,$1021,$1021,$1021,$1021,$001a,$001a,$001a,$001a,$0040,$0040,$001a,$001a,$001a,$001a,$1021,$1021
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dw $1030,$0015,$0015,$0015,$0015,$0015,$0015,$0015,$0015,$1033,$1808,$180C,$0808,$080C,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1024,$0025,$0025,$0025,$0025,$0025,$0025,$1026,$1021,$1030,$0015,$0015,$0015,$0015,$1230,$1021,$1077,$1076,$1077,$1076,$1077,$1076,$1077,$1076,$1024,$0025,$0025,$1026,$1021,$1077,$1076,$1077,$1076,$1013,$0014,$0015,$1016,$1021,$1021,$1021,$1021
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dw $1030,$0015,$0015,$0015,$0015,$0015,$0015,$0015,$0015,$1033,$1808,$180C,$0808,$080C,$5808,$580C,$4808,$480C,$1021,$1021,$1021,$1021,$1021,$1024,$0025,$0025,$0025,$0025,$0025,$0025,$1026,$1021,$1030,$0015,$0015,$0015,$0015,$1230,$1021,$5077,$5076,$5077,$5076,$1077,$1076,$1077,$1076,$1024,$0025,$0025,$1026,$1021,$1077,$1076,$1077,$1076,$1013,$0014,$0015,$1016,$1021,$1021,$1021,$1021
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dw $1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1013,$0014,$0015,$1016,$1021,$1021,$1021,$1024,$0025,$0025,$0025,$0025,$1026,$1021,$1021,$1021,$1013,$0014,$0015,$1016,$1030,$0015,$0015,$0015,$0015,$0015,$0015,$0015,$0015,$1033,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1013,$0014,$0015,$1016,$1021,$1024,$0025,$0025,$0025,$0025,$0025,$0025,$1026,$1021
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dw $1030,$0015,$0015,$0015,$0015,$1033,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1024,$0025,$0025,$1026,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1024,$0025,$0025,$0025,$0025,$1026,$1021,$1021,$1021,$1021,$1021,$1021,$1021
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dw $1030,$0015,$0015,$0015,$0015,$0015,$0015,$0015,$0015,$1033,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1024,$0025,$0025,$0025,$0025,$0025,$0025,$1026,$1021,$1030,$0015,$0015,$0015,$0015,$1033,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1024,$0025,$0025,$1026,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021,$1021
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File diff suppressed because it is too large
Load Diff
@ -184,7 +184,7 @@ EvtLoop
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sec
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sbc ScreenY1
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cmp #8
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bcs :vsyncloop
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bcs :vsyncloop ; Wait until we're within the top 8 scanlines
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lda #1
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jsl SetBorderColor
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:no_vsync
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101
src/Sprite.s
101
src/Sprite.s
@ -122,7 +122,12 @@ _ClearSpriteFromTileStore
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; This function looks at the sprite list and renders the sprite plane data into the appropriate
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; tiles in the code field. There are a few phases to this routine. The assumption is that
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; any sprite that needs to be re-drawn has been marked as DIRTY.
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; any sprite that needs to be re-drawn has been marked as DIRTY or DAMAGED.
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;
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; A DIRTY sprite is one that has moved, so it needs to be erased/redrawn in the sprite
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; buffer AND the tiles it covers marked for refresh. A DAMAGED sprite shared one or more
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; tiles with a DIRTY sprite, so it needs to be redraw in the sprite buffer (but not erased!)
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; and its tile do NOT need to be marked for refresh.
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;
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; In the first phase, we run through the list of dirty sprites and erase them from their
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; OLD_VBUFF_ADDR. This clears the sprite plane buffers. We also iterate through the
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@ -135,7 +140,6 @@ _ClearSpriteFromTileStore
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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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; 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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forceSpriteFlag ds 2
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_RenderSprites
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@ -143,7 +147,7 @@ _RenderSprites
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; last time that the frame was rendered, then we need to mark all of the sprites as dirty so that
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; the tiles on which they were located at the previous frame will be refreshed
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;
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; OPTIMIZATION NOTE: Shoud check that the sprite actually chanegs position. If the screen scrolles
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; OPTIMIZATION NOTE: Should check that the sprite actually changes position. If the screen scrolls
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; by +X, but the sprite moves by -X (so it's relative position is unchanged), then
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; it does NOT need to be marked as dirty.
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@ -161,6 +165,32 @@ _RenderSprites
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sta forceSpriteFlag
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:no_chng_y
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; Alter first phase. _OpenListHead is, essentially, a count of how many sprites. We can use that as an early-out
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; test to stop scanning the SPRITE_STATUS values once all active sprites have been accounted for.
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; lda _OpenListHead
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; beq :exit1
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; lsr
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; sta tmp0
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; lda _Sprites+SPRITE_STATUS
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; beq :exit1
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; ldy #0
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; jsr _ClearSprite
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; dec tmp0
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; beq :exit1
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; lda _Sprites+SPRITE_STATUS+2
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; beq :exit1
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; ldy #2
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; jsr _ClearSprite
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; dec tmp0
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; beq :exit1
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; ...
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;:exit1
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; First phase, erase all dirty sprites
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ldy #0
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:loop1 lda _Sprites+SPRITE_STATUS,y ; If the status is zero, that's the sentinel value
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@ -281,37 +311,16 @@ _GetTileAt
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clc
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rts
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; X = _Sprites array offset
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_EraseSprite
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txy
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; Y = _Sprites array offset
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_EraseSpriteY
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lda _Sprites+OLD_VBUFF_ADDR,y
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beq :noerase
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lda _Sprites+SPRITE_ID,y
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and #$1800 ; use bits 11 and 12 to dispatch (oly care about size)
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lsr
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lsr
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xba
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tax
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jmp (:erase_sprite,x)
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ldx _Sprites+SPRITE_DISP,y ; get the dispatch index for this sprite
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jmp (:do_erase,x)
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:noerase rts
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:erase_sprite dw erase_8x8,erase_8x16,erase_16x8,erase_16x16
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:do_erase dw _EraseTileSprite8x8,_EraseTileSprite8x16
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dw _EraseTileSprite16x8,_EraseTileSprite16x16
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erase_8x8
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ldx _Sprites+OLD_VBUFF_ADDR,y
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jmp _EraseTileSprite8x8 ; erase from the old position
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erase_8x16
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ldx _Sprites+OLD_VBUFF_ADDR,y
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jmp _EraseTileSprite8x16
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erase_16x8
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ldx _Sprites+OLD_VBUFF_ADDR,y
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jmp _EraseTileSprite16x8
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erase_16x16
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ldx _Sprites+OLD_VBUFF_ADDR,y
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jmp _EraseTileSprite16x16
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; X = _Sprites array offset
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_DrawSprite
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@ -768,8 +777,9 @@ _CacheSpriteBanks
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SPRITE_PLANE_SPAN equ 256
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; X = bank address
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; A = bank address
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_EraseTileSprite8x8
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tax
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phb ; Save the bank to switch to the sprite plane
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pei SpriteBanks
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@ -795,6 +805,7 @@ _EraseTileSprite8x8
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rts
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_EraseTileSprite8x16
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tax
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phb ; Save the bank to switch to the sprite plane
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pei SpriteBanks
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@ -820,6 +831,7 @@ _EraseTileSprite8x16
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rts
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_EraseTileSprite16x8
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tax
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phb ; Save the bank to switch to the sprite plane
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pei SpriteBanks
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@ -849,6 +861,7 @@ _EraseTileSprite16x8
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rts
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_EraseTileSprite16x16
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tax
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phb ; Save the bank to switch to the sprite plane
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pei SpriteBanks
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@ -968,6 +981,8 @@ _AddSprite
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jsr _GetSpriteVBuffAddrTmp ; Preserves X-register
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sta _Sprites+VBUFF_ADDR,x
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jsr _PrecalcAllSpriteInfo ; Cache stuff
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txa ; And return the sprite ID
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clc ; Mark that the sprite was successfully added
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@ -983,6 +998,22 @@ _AddSprite
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rts
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; Precalculate some cached values for a sprite. These are *only* to make other part of code,
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; specifically the draw/erase routines more efficient.
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;
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; There are variations of thi routine based on whether we are adding a new sprite, updating
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; it's tile information, or changing its position.
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;
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; X = sprite index
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_PrecalcAllSpriteInfo
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lda _Sprites+SPRITE_ID,x
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and #$1800 ; use bits 11 and 12 to dispatch (oly care about size)
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lsr
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lsr
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xba
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sta _Sprites+SPRITE_DISP,x
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rts
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; Remove a sprite from the list. Just mark its STATUS as FREE and it will be
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; picked up in the next AddSprite.
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;
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@ -1032,6 +1063,8 @@ _UpdateSpriteXnc
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jsr _GetTileAddr ; This applies the TILE_ID_MASK
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sta _Sprites+TILE_DATA_OFFSET,x
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jsr _PrecalcAllSpriteInfo ; Cache stuff
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lda #SPRITE_STATUS_DIRTY ; Content is changing, mark as dirty
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sta _Sprites+SPRITE_STATUS,x
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@ -1093,12 +1126,13 @@ _MoveSpriteXnc
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NUM_BUFF_LINES equ 24
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MAX_SPRITES equ 16
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SPRITE_REC_SIZE equ 34
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SPRITE_REC_SIZE equ 36
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SPRITE_STATUS_EMPTY equ 0
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SPRITE_STATUS_CLEAN equ 1
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SPRITE_STATUS_EMPTY equ 0 ; slot is unitialized / free
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SPRITE_STATUS_CLEAN equ 1 ;
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SPRITE_STATUS_DIRTY equ 2
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SPRITE_STATUS_FREE equ 4
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SPRITE_STATUS_DAMAGED equ 8
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SPRITE_STATUS equ {MAX_SPRITES*0}
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TILE_DATA_OFFSET equ {MAX_SPRITES*2}
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@ -1117,6 +1151,7 @@ TILE_STORE_ADDR_7 equ {MAX_SPRITES*26}
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TILE_STORE_ADDR_8 equ {MAX_SPRITES*28}
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TILE_STORE_ADDR_9 equ {MAX_SPRITES*30}
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TILE_STORE_ADDR_10 equ {MAX_SPRITES*32}
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SPRITE_DISP equ {MAX_SPRITES*34} ; pre-calculated index for jmp (abs,x) based on sprite size
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; Maintain the index of the next open sprite slot. This allows us to have amortized
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; constant sprite add performance. A negative value means no slots are available.
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@ -84,21 +84,18 @@ mdsOut rts
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_MarkDirtySprite
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stz _Sprites+TILE_STORE_ADDR_1,x ; Clear the this sprite's dirty tile list in case of an early exit
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lda _SpriteBits,x
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lda _SpriteBits,x ; Cache its bit flag to mark in the tile slots
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sta SpriteBit
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; Clip the sprite's extent to the screen so we can assume (mostly) position values from here on out. Note that
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; the sprite width and height are _only_ used in the clip and afterward all calculation use the clip rect
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;
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; OPTIMIZATION NODE: These values can be calculated in AddSprite/MoveSprite once and stored in the sprite
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; record since the screen size doesn't change.
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; record since the screen size doesn't change. An off-screen flag can be set.
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lda _Sprites+SPRITE_ID,x ; Get an index into the height/width tables based on the sprite bits
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and #$1800
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xba
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lsr
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lsr
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tay
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ldy _Sprites+SPRITE_DISP,x ; Get an index into the height/width tables based on the sprite bits
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; lda _Sprites+IS_OFF_SCREEN,x ; Check if the sprite is visible in the playfield
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; bne mdsOut
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lda _Sprites+SPRITE_X,x
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bpl :pos_x
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@ -189,7 +186,8 @@ _MarkDirtySprite
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sta ColLeft
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; Sneak a pre-calculation here. Calculate the upper-left corder of the sprite in the sprite plane.
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; We can reuse this in all of the routines below
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; We can reuse this in all of the routines below. This is not the (x,y) of the sprite itself, but
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; the corner of the tile it overlaps with
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clc
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lda TileTop
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@ -219,10 +217,10 @@ _MarkDirtySprite
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; Dispatch to the calculated sizing
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; Begin a list of subroutines to cover all of the valid sprite size compinations. This is all unrolled code,
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; maily to be able to do an unrolled fill of the TILE_STORE_ADDR_X values. Thus, it's important that the clipping
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; function does its job properly since it allows up to save a lot of time here.
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; mainly to be able to do an unrolled fill of the TILE_STORE_ADDR_X values. Thus, it's important that the clipping
|
||||
; function does its job properly since it allows us to save a lot of time here.
|
||||
;
|
||||
; These functional are a trade off of being composable versus fast. Having to pay for multiple JSR/RTS invoations
|
||||
; These functions are a trade off of being composable versus fast. Having to pay for multiple JSR/RTS invocations
|
||||
; in the hot sprite path isn't great, but we're at a point of diminishing returns.
|
||||
;
|
||||
; There *might* be some speed gained by pushing a list of :mark_R_C addressed onto the stack in the clipping routing
|
||||
|
||||
@ -678,10 +678,10 @@ _PushDirtyTileX
|
||||
lda TileStore+TS_DIRTY,x
|
||||
bpl :occupied2
|
||||
|
||||
lda DirtyTileCount
|
||||
sta TileStore+TS_DIRTY,x
|
||||
txa ; any non-negative value will work, this saves work below
|
||||
sta TileStore+TS_DIRTY,x ; and is 1 cycle fater than loading a constanct value
|
||||
|
||||
txa
|
||||
; txa
|
||||
ldx DirtyTileCount
|
||||
sta DirtyTiles,x
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user