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slight format changes on ipf1

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minjaesong
2022-05-03 09:53:56 +09:00
parent dfd58b00b2
commit 89bb944869
2 changed files with 23 additions and 25 deletions
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28
assets/disk0/encodeipf.js
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@@ -35,13 +35,13 @@ Image is divided into 4x4 blocks and each block is serialised, then the entire f
Bits are packed like so:
uint32 SUBSAMPLING MASK (unimplemented; dont write this)
uint8 [Cg-Top Left | Co-Top Left]
uint8 [Co-Top Right | Co-Top Left]
uint8 [Co-Bottom Right | Co-Bottom Left]
uint8 [Cg-Top Right | Cg-Top Left]
uint8 [Cg-Bottom Right | Cg-Bottom Left]
uint16 [Y1 | Y0 | Y5 | Y4]
uint8 [Cg-Top Right | Co-Top Right]
uint16 [Y3 | Y2 | Y7 | Y6]
uint8 [Cg-Bottom Left | Co-Bottom Left]
uint16 [Y9 | Y8 | YD | YC]
uint8 [Cg-Bottom Right | Co-Bottom Right]
uint16 [YB | YA | YF | YE]
(total: 12 bytes)
@@ -197,16 +197,16 @@ for (let blockX = 0; blockX < Math.ceil(imgw / 4.0); blockX++) {
// append encoded blocks to the file
let outBlock = writeBuf + writeCount
sys.poke(outBlock+ 0, (cgs1 << 4) | cos1)
sys.poke(outBlock+ 1, (ys[1] << 4) | ys[0])
sys.poke(outBlock+ 2, (ys[5] << 4) | ys[4])
sys.poke(outBlock+ 3, (cgs2 << 4) | cos2)
sys.poke(outBlock+ 4, (ys[3] << 4) | ys[2])
sys.poke(outBlock+ 5, (ys[7] << 4) | ys[6])
sys.poke(outBlock+ 6, (cgs3 << 4) | cos3)
sys.poke(outBlock+ 7, (ys[9] << 4) | ys[8])
sys.poke(outBlock+ 8, (ys[13] << 4) | ys[12])
sys.poke(outBlock+ 9, (cgs4 << 4) | cos4)
sys.poke(outBlock+ 0, (cos2 << 4) | cos1)
sys.poke(outBlock+ 1, (cos4 << 4) | cos3)
sys.poke(outBlock+ 2, (cgs2 << 4) | cgs1)
sys.poke(outBlock+ 3, (cgs4 << 4) | cgs3)
sys.poke(outBlock+ 4, (ys[1] << 4) | ys[0])
sys.poke(outBlock+ 5, (ys[5] << 4) | ys[4])
sys.poke(outBlock+ 6, (ys[3] << 4) | ys[2])
sys.poke(outBlock+ 7, (ys[7] << 4) | ys[6])
sys.poke(outBlock+ 8, (ys[9] << 4) | ys[8])
sys.poke(outBlock+ 9, (ys[13] << 4) | ys[12])
sys.poke(outBlock+10, (ys[11] << 4) | ys[10])
sys.poke(outBlock+11, (ys[15] << 4) | ys[14])