mirror of
https://github.com/thornAvery/kep-hack.git
synced 2026-04-08 11:31:55 +12:00
No more W_
This commit is contained in:
dannye
parent
1ee9fb408c
commit
38065a744d
190 changed files with 2202 additions and 2202 deletions
218
home/pic.asm
218
home/pic.asm
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@ -1,5 +1,5 @@
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; bankswitches and runs _UncompressSpriteData
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; bank is given in a, sprite input stream is pointed to in W_SPRITEINPUTPTR
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; bank is given in a, sprite input stream is pointed to in wSpriteInputPtr
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UncompressSpriteData:: ; 24fd (0:24fd)
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ld b, a
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ld a, [H_LOADEDROMBANK]
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@ -25,29 +25,29 @@ _UncompressSpriteData:: ; 251a (0:251a)
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xor a
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call FillMemory ; clear sprite buffer 1 and 2
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ld a, $1
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ld [W_SPRITEINPUTBITCOUNTER], a
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ld [wSpriteInputBitCounter], a
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ld a, $3
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ld [W_SPRITEOUTPUTBITOFFSET], a
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ld [wSpriteOutputBitOffset], a
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xor a
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ld [W_SPRITECURPOSX], a
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ld [W_SPRITECURPOSY], a
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ld [W_SPRITELOADFLAGS], a
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ld [wSpriteCurPosX], a
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ld [wSpriteCurPosY], a
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ld [wSpriteLoadFlags], a
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call ReadNextInputByte ; first byte of input determines sprite width (high nybble) and height (low nybble) in tiles (8x8 pixels)
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ld b, a
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and $f
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add a
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add a
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add a
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ld [W_SPRITEHEIGHT], a
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ld [wSpriteHeight], a
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ld a, b
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swap a
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and $f
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add a
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add a
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add a
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ld [W_SPRITEWITDH], a
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ld [wSpriteWidth], a
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call ReadNextInputBit
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ld [W_SPRITELOADFLAGS], a ; initialite bit1 to 0 and bit0 to the first input bit
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ld [wSpriteLoadFlags], a ; initialite bit1 to 0 and bit0 to the first input bit
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; this will load two chunks of data to S_SPRITEBUFFER1 and S_SPRITEBUFFER2
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; bit 0 decides in which one the first chunk is placed
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; fall through
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@ -57,13 +57,13 @@ _UncompressSpriteData:: ; 251a (0:251a)
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; note that this is an endless loop which is terminated during a call to MoveToNextBufferPosition by manipulating the stack
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UncompressSpriteDataLoop:: ; 2556 (0:2556)
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ld hl, S_SPRITEBUFFER1
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ld a, [W_SPRITELOADFLAGS]
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ld a, [wSpriteLoadFlags]
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bit 0, a
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jr z, .useSpriteBuffer1 ; check which buffer to use
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ld hl, S_SPRITEBUFFER2
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.useSpriteBuffer1
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call StoreSpriteOutputPointer
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ld a, [W_SPRITELOADFLAGS]
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ld a, [wSpriteLoadFlags]
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bit 1, a
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jr z, .startDecompression ; check if last iteration
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call ReadNextInputBit ; if last chunk, read 1-2 bit unpacking mode
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@ -72,7 +72,7 @@ UncompressSpriteDataLoop:: ; 2556 (0:2556)
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call ReadNextInputBit ; 1 0 -> mode 1
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inc a ; 1 1 -> mode 2
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.unpackingMode0
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ld [W_SPRITEUNPACKMODE], a
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ld [wSpriteUnpackMode], a
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.startDecompression
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call ReadNextInputBit
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and a
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@ -146,69 +146,69 @@ UncompressSpriteDataLoop:: ; 2556 (0:2556)
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; also cancels the calling function if the all output is done (by removing the return pointer from stack)
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; and calls postprocessing functions according to the unpack mode
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MoveToNextBufferPosition:: ; 25d8 (0:25d8)
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ld a, [W_SPRITEHEIGHT]
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ld a, [wSpriteHeight]
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ld b, a
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ld a, [W_SPRITECURPOSY]
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ld a, [wSpriteCurPosY]
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inc a
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cp b
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jr z, .curColumnDone
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ld [W_SPRITECURPOSY], a
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ld a, [W_SPRITEOUTPUTPTR]
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ld [wSpriteCurPosY], a
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ld a, [wSpriteOutputPtr]
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inc a
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ld [W_SPRITEOUTPUTPTR], a
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ld [wSpriteOutputPtr], a
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ret nz
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ld a, [W_SPRITEOUTPUTPTR+1]
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ld a, [wSpriteOutputPtr+1]
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inc a
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ld [W_SPRITEOUTPUTPTR+1], a
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ld [wSpriteOutputPtr+1], a
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ret
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.curColumnDone
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xor a
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ld [W_SPRITECURPOSY], a
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ld a, [W_SPRITEOUTPUTBITOFFSET]
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ld [wSpriteCurPosY], a
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ld a, [wSpriteOutputBitOffset]
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and a
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jr z, .bitOffsetsDone
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dec a
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ld [W_SPRITEOUTPUTBITOFFSET], a
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ld hl, W_SPRITEOUTPUTPTRCACHED
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ld [wSpriteOutputBitOffset], a
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ld hl, wSpriteOutputPtrCached
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ld a, [hli]
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ld [W_SPRITEOUTPUTPTR], a
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ld [wSpriteOutputPtr], a
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ld a, [hl]
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ld [W_SPRITEOUTPUTPTR+1], a
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ld [wSpriteOutputPtr+1], a
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ret
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.bitOffsetsDone
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ld a, $3
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ld [W_SPRITEOUTPUTBITOFFSET], a
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ld a, [W_SPRITECURPOSX]
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ld [wSpriteOutputBitOffset], a
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ld a, [wSpriteCurPosX]
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add $8
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ld [W_SPRITECURPOSX], a
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ld [wSpriteCurPosX], a
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ld b, a
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ld a, [W_SPRITEWITDH]
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ld a, [wSpriteWidth]
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cp b
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jr z, .allColumnsDone
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ld a, [W_SPRITEOUTPUTPTR]
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ld a, [wSpriteOutputPtr]
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ld l, a
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ld a, [W_SPRITEOUTPUTPTR+1]
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ld a, [wSpriteOutputPtr+1]
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ld h, a
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inc hl
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jp StoreSpriteOutputPointer
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.allColumnsDone
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pop hl
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xor a
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ld [W_SPRITECURPOSX], a
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ld a, [W_SPRITELOADFLAGS]
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ld [wSpriteCurPosX], a
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ld a, [wSpriteLoadFlags]
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bit 1, a
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jr nz, .done ; test if there is one more sprite to go
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xor $1
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set 1, a
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ld [W_SPRITELOADFLAGS], a
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ld [wSpriteLoadFlags], a
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jp UncompressSpriteDataLoop
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.done
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jp UnpackSprite
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; writes 2 bits (from a) to the output buffer (pointed to from W_SPRITEOUTPUTPTR)
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; writes 2 bits (from a) to the output buffer (pointed to from wSpriteOutputPtr)
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WriteSpriteBitsToBuffer:: ; 2649 (0:2649)
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ld e, a
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ld a, [W_SPRITEOUTPUTBITOFFSET]
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ld a, [wSpriteOutputBitOffset]
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and a
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jr z, .offset0
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cp $2
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@ -224,9 +224,9 @@ WriteSpriteBitsToBuffer:: ; 2649 (0:2649)
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.offset2
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swap e
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.offset0
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ld a, [W_SPRITEOUTPUTPTR]
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ld a, [wSpriteOutputPtr]
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ld l, a
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ld a, [W_SPRITEOUTPUTPTR+1]
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ld a, [wSpriteOutputPtr+1]
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ld h, a
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ld a, [hl]
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or e
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@ -235,32 +235,32 @@ WriteSpriteBitsToBuffer:: ; 2649 (0:2649)
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; reads next bit from input stream and returns it in a
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ReadNextInputBit:: ; 2670 (0:2670)
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ld a, [W_SPRITEINPUTBITCOUNTER]
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ld a, [wSpriteInputBitCounter]
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dec a
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jr nz, .curByteHasMoreBitsToRead
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call ReadNextInputByte
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ld [W_SPRITEINPUTCURBYTE], a
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ld [wSpriteInputCurByte], a
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ld a, $8
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.curByteHasMoreBitsToRead
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ld [W_SPRITEINPUTBITCOUNTER], a
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ld a, [W_SPRITEINPUTCURBYTE]
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ld [wSpriteInputBitCounter], a
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ld a, [wSpriteInputCurByte]
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rlca
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ld [W_SPRITEINPUTCURBYTE], a
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ld [wSpriteInputCurByte], a
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and $1
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ret
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; reads next byte from input stream and returns it in a
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ReadNextInputByte:: ; 268b (0:268b)
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ld a, [W_SPRITEINPUTPTR]
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ld a, [wSpriteInputPtr]
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ld l, a
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ld a, [W_SPRITEINPUTPTR+1]
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ld a, [wSpriteInputPtr+1]
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ld h, a
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ld a, [hli]
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ld b, a
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ld a, l
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ld [W_SPRITEINPUTPTR], a
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ld [wSpriteInputPtr], a
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ld a, h
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ld [W_SPRITEINPUTPTR+1], a
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ld [wSpriteInputPtr+1], a
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ld a, b
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ret
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@ -285,7 +285,7 @@ LengthEncodingOffsetList:: ; 269f (0:269f)
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; unpacks the sprite data depending on the unpack mode
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UnpackSprite:: ; 26bf (0:26bf)
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ld a, [W_SPRITEUNPACKMODE]
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ld a, [wSpriteUnpackMode]
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cp $2
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jp z, UnpackSpriteMode2
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and a
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@ -299,10 +299,10 @@ UnpackSprite:: ; 26bf (0:26bf)
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; input bit value 0 preserves the current bit value and input bit value 1 toggles it (starting from initial value 0).
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SpriteDifferentialDecode:: ; 26d4 (0:26d4)
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xor a
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ld [W_SPRITECURPOSX], a
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ld [W_SPRITECURPOSY], a
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ld [wSpriteCurPosX], a
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ld [wSpriteCurPosY], a
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call StoreSpriteOutputPointer
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ld a, [W_SPRITEFLIPPED]
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ld a, [wSpriteFlipped]
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and a
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jr z, .notFlipped
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ld hl, DecodeNybble0TableFlipped
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@ -313,18 +313,18 @@ SpriteDifferentialDecode:: ; 26d4 (0:26d4)
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ld de, DecodeNybble1Table
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.storeDecodeTablesPointers
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ld a, l
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ld [W_SPRITEDECODETABLE0PTR], a
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ld [wSpriteDecodeTable0Ptr], a
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ld a, h
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ld [W_SPRITEDECODETABLE0PTR+1], a
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ld [wSpriteDecodeTable0Ptr+1], a
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ld a, e
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ld [W_SPRITEDECODETABLE1PTR], a
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ld [wSpriteDecodeTable1Ptr], a
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ld a, d
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ld [W_SPRITEDECODETABLE1PTR+1], a
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ld [wSpriteDecodeTable1Ptr+1], a
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ld e, $0 ; last decoded nybble, initialized to 0
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.decodeNextByteLoop
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ld a, [W_SPRITEOUTPUTPTR]
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ld a, [wSpriteOutputPtr]
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ld l, a
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ld a, [W_SPRITEOUTPUTPTR+1]
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ld a, [wSpriteOutputPtr+1]
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ld h, a
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ld a, [hl]
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ld b, a
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@ -338,47 +338,47 @@ SpriteDifferentialDecode:: ; 26d4 (0:26d4)
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call DifferentialDecodeNybble ; decode low nybble
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or d
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ld b, a
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ld a, [W_SPRITEOUTPUTPTR]
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ld a, [wSpriteOutputPtr]
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ld l, a
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ld a, [W_SPRITEOUTPUTPTR+1]
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ld a, [wSpriteOutputPtr+1]
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ld h, a
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ld a, b
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ld [hl], a ; write back decoded data
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ld a, [W_SPRITEHEIGHT]
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ld a, [wSpriteHeight]
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add l ; move on to next column
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jr nc, .noCarry
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inc h
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.noCarry
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ld [W_SPRITEOUTPUTPTR], a
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ld [wSpriteOutputPtr], a
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ld a, h
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ld [W_SPRITEOUTPUTPTR+1], a
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ld a, [W_SPRITECURPOSX]
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ld [wSpriteOutputPtr+1], a
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ld a, [wSpriteCurPosX]
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add $8
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ld [W_SPRITECURPOSX], a
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ld [wSpriteCurPosX], a
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ld b, a
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ld a, [W_SPRITEWITDH]
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ld a, [wSpriteWidth]
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cp b
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jr nz, .decodeNextByteLoop ; test if current row is done
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xor a
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ld e, a
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ld [W_SPRITECURPOSX], a
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ld a, [W_SPRITECURPOSY] ; move on to next row
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ld [wSpriteCurPosX], a
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ld a, [wSpriteCurPosY] ; move on to next row
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inc a
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ld [W_SPRITECURPOSY], a
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ld [wSpriteCurPosY], a
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ld b, a
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ld a, [W_SPRITEHEIGHT]
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ld a, [wSpriteHeight]
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cp b
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jr z, .done ; test if all rows finished
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ld a, [W_SPRITEOUTPUTPTRCACHED]
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ld a, [wSpriteOutputPtrCached]
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ld l, a
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ld a, [W_SPRITEOUTPUTPTRCACHED+1]
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ld a, [wSpriteOutputPtrCached+1]
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ld h, a
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inc hl
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call StoreSpriteOutputPointer
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jr .decodeNextByteLoop
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.done
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xor a
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ld [W_SPRITECURPOSY], a
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ld [wSpriteCurPosY], a
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ret
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; decodes the nybble stored in a. Last decoded data is assumed to be in e (needed to determine if initial value is 0 or 1)
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@ -389,7 +389,7 @@ DifferentialDecodeNybble:: ; 276d (0:276d)
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ld c, $1
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.evenNumber
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ld l, a
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ld a, [W_SPRITEFLIPPED]
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ld a, [wSpriteFlipped]
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and a
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jr z, .notFlipped ; determine if initial value is 0 or one
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bit 3, e ; if flipped, consider MSB of last data
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@ -399,14 +399,14 @@ DifferentialDecodeNybble:: ; 276d (0:276d)
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.selectLookupTable
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ld e, l
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jr nz, .initialValue1 ; load the appropriate table
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ld a, [W_SPRITEDECODETABLE0PTR]
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ld a, [wSpriteDecodeTable0Ptr]
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ld l, a
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ld a, [W_SPRITEDECODETABLE0PTR+1]
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ld a, [wSpriteDecodeTable0Ptr+1]
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jr .tableLookup
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.initialValue1
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ld a, [W_SPRITEDECODETABLE1PTR]
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ld a, [wSpriteDecodeTable1Ptr]
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ld l, a
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ld a, [W_SPRITEDECODETABLE1PTR+1]
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ld a, [wSpriteDecodeTable1Ptr+1]
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.tableLookup
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ld h, a
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ld a, e
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@ -464,25 +464,25 @@ DecodeNybble1TableFlipped:: ; 27bf (0:27bf)
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; combines the two loaded chunks with xor (the chunk loaded second is the destination). The source chunk is differeintial decoded beforehand.
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XorSpriteChunks:: ; 27c7 (0:27c7)
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xor a
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ld [W_SPRITECURPOSX], a
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ld [W_SPRITECURPOSY], a
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ld [wSpriteCurPosX], a
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ld [wSpriteCurPosY], a
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call ResetSpriteBufferPointers
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ld a, [W_SPRITEOUTPUTPTR] ; points to buffer 1 or 2, depending on flags
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ld a, [wSpriteOutputPtr] ; points to buffer 1 or 2, depending on flags
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ld l, a
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ld a, [W_SPRITEOUTPUTPTR+1]
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ld a, [wSpriteOutputPtr+1]
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ld h, a
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call SpriteDifferentialDecode ; decode buffer 1 or 2, depending on flags
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call ResetSpriteBufferPointers
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ld a, [W_SPRITEOUTPUTPTR] ; source buffer, points to buffer 1 or 2, depending on flags
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ld a, [wSpriteOutputPtr] ; source buffer, points to buffer 1 or 2, depending on flags
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ld l, a
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ld a, [W_SPRITEOUTPUTPTR+1]
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ld a, [wSpriteOutputPtr+1]
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ld h, a
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ld a, [W_SPRITEOUTPUTPTRCACHED] ; destination buffer, points to buffer 2 or 1, depending on flags
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ld a, [wSpriteOutputPtrCached] ; destination buffer, points to buffer 2 or 1, depending on flags
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ld e, a
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ld a, [W_SPRITEOUTPUTPTRCACHED+1]
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ld a, [wSpriteOutputPtrCached+1]
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ld d, a
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.xorChunksLoop
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ld a, [W_SPRITEFLIPPED]
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ld a, [wSpriteFlipped]
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and a
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jr z, .notFlipped
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push de
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@ -506,24 +506,24 @@ XorSpriteChunks:: ; 27c7 (0:27c7)
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xor b
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ld [de], a
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inc de
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ld a, [W_SPRITECURPOSY]
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ld a, [wSpriteCurPosY]
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inc a
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ld [W_SPRITECURPOSY], a ; go to next row
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ld [wSpriteCurPosY], a ; go to next row
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ld b, a
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ld a, [W_SPRITEHEIGHT]
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ld a, [wSpriteHeight]
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cp b
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jr nz, .xorChunksLoop ; test if column finished
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xor a
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ld [W_SPRITECURPOSY], a
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ld a, [W_SPRITECURPOSX]
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ld [wSpriteCurPosY], a
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ld a, [wSpriteCurPosX]
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add $8
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ld [W_SPRITECURPOSX], a ; go to next column
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ld [wSpriteCurPosX], a ; go to next column
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ld b, a
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ld a, [W_SPRITEWITDH]
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ld a, [wSpriteWidth]
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cp b
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jr nz, .xorChunksLoop ; test if all columns finished
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xor a
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ld [W_SPRITECURPOSX], a
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ld [wSpriteCurPosX], a
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ret
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|
||||
; reverses the bits in the nybble given in register a
|
||||
|
|
@ -537,9 +537,9 @@ ReverseNybble:: ; 2837 (0:2837)
|
|||
ld a, [de]
|
||||
ret
|
||||
|
||||
; resets sprite buffer pointers to buffer 1 and 2, depending on W_SPRITELOADFLAGS
|
||||
; resets sprite buffer pointers to buffer 1 and 2, depending on wSpriteLoadFlags
|
||||
ResetSpriteBufferPointers:: ; 2841 (0:2841)
|
||||
ld a, [W_SPRITELOADFLAGS]
|
||||
ld a, [wSpriteLoadFlags]
|
||||
bit 0, a
|
||||
jr nz, .buffer2Selected
|
||||
ld de, S_SPRITEBUFFER1
|
||||
|
|
@ -550,13 +550,13 @@ ResetSpriteBufferPointers:: ; 2841 (0:2841)
|
|||
ld hl, S_SPRITEBUFFER1
|
||||
.storeBufferPointers
|
||||
ld a, l
|
||||
ld [W_SPRITEOUTPUTPTR], a
|
||||
ld [wSpriteOutputPtr], a
|
||||
ld a, h
|
||||
ld [W_SPRITEOUTPUTPTR+1], a
|
||||
ld [wSpriteOutputPtr+1], a
|
||||
ld a, e
|
||||
ld [W_SPRITEOUTPUTPTRCACHED], a
|
||||
ld [wSpriteOutputPtrCached], a
|
||||
ld a, d
|
||||
ld [W_SPRITEOUTPUTPTRCACHED+1], a
|
||||
ld [wSpriteOutputPtrCached+1], a
|
||||
ret
|
||||
|
||||
; maps each nybble to its reverse
|
||||
|
|
@ -566,26 +566,26 @@ NybbleReverseTable:: ; 2867 (0:2867)
|
|||
; combines the two loaded chunks with xor (the chunk loaded second is the destination). Both chunks are differeintial decoded beforehand.
|
||||
UnpackSpriteMode2:: ; 2877 (0:2877)
|
||||
call ResetSpriteBufferPointers
|
||||
ld a, [W_SPRITEFLIPPED]
|
||||
ld a, [wSpriteFlipped]
|
||||
push af
|
||||
xor a
|
||||
ld [W_SPRITEFLIPPED], a ; temporarily clear flipped flag for decoding the destination chunk
|
||||
ld a, [W_SPRITEOUTPUTPTRCACHED]
|
||||
ld [wSpriteFlipped], a ; temporarily clear flipped flag for decoding the destination chunk
|
||||
ld a, [wSpriteOutputPtrCached]
|
||||
ld l, a
|
||||
ld a, [W_SPRITEOUTPUTPTRCACHED+1]
|
||||
ld a, [wSpriteOutputPtrCached+1]
|
||||
ld h, a
|
||||
call SpriteDifferentialDecode
|
||||
call ResetSpriteBufferPointers
|
||||
pop af
|
||||
ld [W_SPRITEFLIPPED], a
|
||||
ld [wSpriteFlipped], a
|
||||
jp XorSpriteChunks
|
||||
|
||||
; stores hl into the output pointers
|
||||
StoreSpriteOutputPointer:: ; 2897 (0:2897)
|
||||
ld a, l
|
||||
ld [W_SPRITEOUTPUTPTR], a
|
||||
ld [W_SPRITEOUTPUTPTRCACHED], a
|
||||
ld [wSpriteOutputPtr], a
|
||||
ld [wSpriteOutputPtrCached], a
|
||||
ld a, h
|
||||
ld [W_SPRITEOUTPUTPTR+1], a
|
||||
ld [W_SPRITEOUTPUTPTRCACHED+1], a
|
||||
ld [wSpriteOutputPtr+1], a
|
||||
ld [wSpriteOutputPtrCached+1], a
|
||||
ret
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue