mirror of
https://github.com/curioustorvald/tsvm.git
synced 2026-03-07 11:51:49 +09:00
ipf related updates
This commit is contained in:
minjaesong
BIN
assets/disk0/barns.png
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assets/disk0/barns.png
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After Width: | Height: | Size: 522 KiB |
@@ -1,255 +0,0 @@
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if (!exec_args[1]) {
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printerrln("Usage: decodeipf input.ipf")
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return 1
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}
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let filename = exec_args[1]
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const MAGIC = [0x1F, 0x54, 0x53, 0x56, 0x4D, 0x69, 0x50, 0x46]
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const port = filesystem._toPorts("A")[0]
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com.sendMessage(port, "DEVRST\x17")
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com.sendMessage(port, `OPENR"${filename}",1`)
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let statusCode = com.getStatusCode(port)
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if (statusCode != 0) {
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printerrln(`No such file (${statusCode})`)
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return statusCode
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}
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com.sendMessage(port, "READ")
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statusCode = com.getStatusCode(port)
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if (statusCode != 0) {
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printerrln("READ failed with "+statusCode)
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return statusCode
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}
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con.clear(); con.curs_set(0)
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let readCount = 0
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function readBytes(length) {
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let ptr = sys.malloc(length)
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let requiredBlocks = Math.floor((readCount + length) / 4096) - Math.floor(readCount / 4096)
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let completedReads = 0
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//serial.println(`readBytes(${length}); readCount = ${readCount}`)
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for (let bc = 0; bc < requiredBlocks + 1; bc++) {
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if (completedReads >= length) break
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if (readCount % 4096 == 0) {
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//serial.println("READ from serial")
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// pull the actual message
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sys.poke(-4093 - port, 6);sys.sleep(0) // spinning is required as Graal run is desynced with the Java side
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let blockTransferStatus = ((sys.peek(-4085 - port*2) & 255) | ((sys.peek(-4086 - port*2) & 255) << 8))
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let thisBlockLen = blockTransferStatus & 4095
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if (thisBlockLen == 0) thisBlockLen = 4096 // [1, 4096]
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let hasMore = (blockTransferStatus & 0x8000 != 0)
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//serial.println(`block: (${thisBlockLen})[${[...Array(thisBlockLen).keys()].map(k => (sys.peek(-4097 - k) & 255).toString(16).padStart(2,'0')).join()}]`)
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let remaining = Math.min(thisBlockLen, length - completedReads)
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//serial.println(`Pulled a block (${thisBlockLen}); readCount = ${readCount}, completedReads = ${completedReads}, remaining = ${remaining}`)
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// copy from read buffer to designated position
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sys.memcpy(-4097, ptr + completedReads, remaining)
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// increment readCount properly
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readCount += remaining
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completedReads += remaining
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}
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else {
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let padding = readCount % 4096
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let remaining = length - completedReads
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let thisBlockLen = Math.min(4096 - padding, length - completedReads)
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//serial.println(`padding = ${padding}; remaining = ${remaining}`)
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//serial.println(`block: (${thisBlockLen})[${[...Array(thisBlockLen).keys()].map(k => (sys.peek(-4097 - padding - k) & 255).toString(16).padStart(2,'0')).join()}]`)
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//serial.println(`Reusing a block (${thisBlockLen}); readCount = ${readCount}, completedReads = ${completedReads}`)
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// copy from read buffer to designated position
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sys.memcpy(-4097 - padding, ptr + completedReads, thisBlockLen)
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// increment readCount properly
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readCount += thisBlockLen
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completedReads += thisBlockLen
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}
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}
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//serial.println(`END readBytes(${length}); readCount = ${readCount}\n`)
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return ptr
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}
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function readInt() {
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let b = readBytes(4)
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let i = (sys.peek(b) & 255) | ((sys.peek(b+1) & 255) << 8) | ((sys.peek(b+2) & 255) << 16) | ((sys.peek(b+3) & 255) << 24)
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//serial.println(`readInt(); bytes: ${sys.peek(b)}, ${sys.peek(b+1)}, ${sys.peek(b+2)}, ${sys.peek(b+3)} = ${i}\n`)
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sys.free(b)
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return i
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}
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function readShort() {
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let b = readBytes(2)
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let i = (sys.peek(b) & 255) | ((sys.peek(b+1) & 255) << 8)
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//serial.println(`readShort(); bytes: ${sys.peek(b)}, ${sys.peek(b+1)} = ${i}\n`)
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sys.free(b)
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return i
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}
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function readByte() {
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let b = readBytes(1)
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let i = (sys.peek(b) & 255)
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//serial.println(`readShort(); bytes: ${sys.peek(b)}, ${sys.peek(b+1)} = ${i}\n`)
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sys.free(b)
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return i
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}
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let magic = readBytes(8)
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let magicMatching = true
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// check if magic number matches
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MAGIC.forEach((b,i) => {
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let testb = sys.peek(magic + i) & 255 // for some reason this must be located here
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if (testb != b) {
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magicMatching = false
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}
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})
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sys.free(magic)
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if (!magicMatching) {
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println("Not an IPF file (MAGIC mismatch)")
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return 1
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}
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let imgw = readShort()
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let imgh = readShort()
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let hasAlpha = (readShort() != 0)
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sys.free(readBytes(10)) // skip 10 bytes
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// TODO: gzip
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function clampRGB(f) {
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return (f > 1.0) ? 1.0 : (f < 0.0) ? 0.0 : f
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}
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function ycocgToRGB(co, cg, ys, as) { // ys: 4 Y-values
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// return [R1|G1, B1|A1, R2|G2, B2|A2, R3|G3, B3|A3, R4|G4, B4|A4]
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// cocg = 0x7777
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// ys = 0x7777
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co = (co - 7) / 8.0
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cg = (cg - 7) / 8.0
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let y1 = (ys & 15) / 15.0
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let a1 = as & 15
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let tmp = y1 - cg / 2.0
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let g1 = clampRGB(cg + tmp)
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let b1 = clampRGB(tmp - co / 2.0)
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let r1 = clampRGB(b1 + co)
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let y2 = ((ys >>> 4) & 15) / 15.0
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let a2 = (as >>> 4) & 15
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tmp = y2 - cg / 2.0
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let g2 = clampRGB(cg + tmp)
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let b2 = clampRGB(tmp - co / 2.0)
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let r2 = clampRGB(b2 + co)
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let y3 = ((ys >>> 8) & 15) / 15.0
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let a3 = (as >>> 8) & 15
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tmp = y3 - cg / 2.0
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let g3 = clampRGB(cg + tmp)
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let b3 = clampRGB(tmp - co / 2.0)
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let r3 = clampRGB(b3 + co)
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let y4 = ((ys >>> 12) & 15) / 15.0
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let a4 = (as >>> 12) & 15
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tmp = y4 - cg / 2.0
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let g4 = clampRGB(cg + tmp)
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let b4 = clampRGB(tmp - co / 2.0)
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let r4 = clampRGB(b4 + co)
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return [
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(Math.round(r1 * 15) << 4) | Math.round(g1 * 15),
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(Math.round(b1 * 15) << 4) | a1,
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(Math.round(r2 * 15) << 4) | Math.round(g2 * 15),
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(Math.round(b2 * 15) << 4) | a2,
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(Math.round(r3 * 15) << 4) | Math.round(g3 * 15),
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(Math.round(b3 * 15) << 4) | a3,
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(Math.round(r4 * 15) << 4) | Math.round(g4 * 15),
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(Math.round(b4 * 15) << 4) | a4,
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]
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}
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graphics.setGraphicsMode(4)
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for (let blockY = 0; blockY < Math.ceil(imgh / 4.0); blockY++) {
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for (let blockX = 0; blockX < Math.ceil(imgw / 4.0); blockX++) {
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let rg = new Uint8Array(16) // [R1G1, R2G2, R3G3, R4G4, ...]
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let ba = new Uint8Array(16)
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let co = readShort()
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let cg = readShort()
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let y1 = readShort()
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let y2 = readShort()
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let y3 = readShort()
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let y4 = readShort()
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let a1 = 65535; let a2 = 65535; let a3 = 65535; let a4 = 65535
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if (hasAlpha) {
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a1 = readShort()
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a2 = readShort()
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a3 = readShort()
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a4 = readShort()
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}
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let corner = ycocgToRGB(co & 15, cg & 15, y1, a1)
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rg[0] = corner[0];ba[0] = corner[1]
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rg[1] = corner[2];ba[1] = corner[3]
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rg[4] = corner[4];ba[4] = corner[5]
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rg[5] = corner[6];ba[5] = corner[7]
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corner = ycocgToRGB((co >> 4) & 15, (cg >> 4) & 15, y2, a2)
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rg[2] = corner[0];ba[2] = corner[1]
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rg[3] = corner[2];ba[3] = corner[3]
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rg[6] = corner[4];ba[6] = corner[5]
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rg[7] = corner[6];ba[7] = corner[7]
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corner = ycocgToRGB((co >> 8) & 15, (cg >> 8) & 15, y3, a3)
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rg[8] = corner[0];ba[8] = corner[1]
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rg[9] = corner[2];ba[9] = corner[3]
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rg[12] = corner[4];ba[12] = corner[5]
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rg[13] = corner[6];ba[13] = corner[7]
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corner = ycocgToRGB((co >> 12) & 15, (cg >> 12) & 15, y4, a4)
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rg[10] = corner[0];ba[10] = corner[1]
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rg[11] = corner[2];ba[11] = corner[3]
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rg[14] = corner[4];ba[14] = corner[5]
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rg[15] = corner[6];ba[15] = corner[7]
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// move decoded pixels into memory
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for (let py = 0; py < 4; py++) { for (let px = 0; px < 4; px++) {
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let ox = blockX * 4 + px
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let oy = blockY * 4 + py
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let offset = oy * 560 + ox
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sys.poke(-1048577 - offset, rg[py * 4 + px])
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sys.poke(-1310721 - offset, ba[py * 4 + px])
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}}
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}}
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@@ -1,257 +0,0 @@
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if (!exec_args[1]) {
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printerrln("Usage: decodeipf input.ipf")
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return 1
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}
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let filename = exec_args[1]
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const MAGIC = [0x1F, 0x54, 0x53, 0x56, 0x4D, 0x69, 0x50, 0x46]
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const port = filesystem._toPorts("A")[0]
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com.sendMessage(port, "DEVRST\x17")
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com.sendMessage(port, `OPENR"${filename}",1`)
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let statusCode = com.getStatusCode(port)
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if (statusCode != 0) {
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printerrln(`No such file (${statusCode})`)
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return statusCode
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}
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com.sendMessage(port, "READ")
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statusCode = com.getStatusCode(port)
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if (statusCode != 0) {
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printerrln("READ failed with "+statusCode)
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return statusCode
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}
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con.clear(); con.curs_set(0)
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let readCount = 0
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function readBytes(length) {
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let ptr = sys.malloc(length)
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let requiredBlocks = Math.floor((readCount + length) / 4096) - Math.floor(readCount / 4096)
|
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|
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let completedReads = 0
|
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|
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//serial.println(`readBytes(${length}); readCount = ${readCount}`)
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|
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for (let bc = 0; bc < requiredBlocks + 1; bc++) {
|
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if (completedReads >= length) break
|
||||
|
||||
if (readCount % 4096 == 0) {
|
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//serial.println("READ from serial")
|
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// pull the actual message
|
||||
sys.poke(-4093 - port, 6);sys.sleep(0) // spinning is required as Graal run is desynced with the Java side
|
||||
|
||||
let blockTransferStatus = ((sys.peek(-4085 - port*2) & 255) | ((sys.peek(-4086 - port*2) & 255) << 8))
|
||||
let thisBlockLen = blockTransferStatus & 4095
|
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if (thisBlockLen == 0) thisBlockLen = 4096 // [1, 4096]
|
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let hasMore = (blockTransferStatus & 0x8000 != 0)
|
||||
|
||||
|
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//serial.println(`block: (${thisBlockLen})[${[...Array(thisBlockLen).keys()].map(k => (sys.peek(-4097 - k) & 255).toString(16).padStart(2,'0')).join()}]`)
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||||
|
||||
let remaining = Math.min(thisBlockLen, length - completedReads)
|
||||
|
||||
//serial.println(`Pulled a block (${thisBlockLen}); readCount = ${readCount}, completedReads = ${completedReads}, remaining = ${remaining}`)
|
||||
|
||||
// copy from read buffer to designated position
|
||||
sys.memcpy(-4097, ptr + completedReads, remaining)
|
||||
|
||||
// increment readCount properly
|
||||
readCount += remaining
|
||||
completedReads += remaining
|
||||
}
|
||||
else {
|
||||
let padding = readCount % 4096
|
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let remaining = length - completedReads
|
||||
let thisBlockLen = Math.min(4096 - padding, length - completedReads)
|
||||
|
||||
//serial.println(`padding = ${padding}; remaining = ${remaining}`)
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||||
|
||||
//serial.println(`block: (${thisBlockLen})[${[...Array(thisBlockLen).keys()].map(k => (sys.peek(-4097 - padding - k) & 255).toString(16).padStart(2,'0')).join()}]`)
|
||||
|
||||
//serial.println(`Reusing a block (${thisBlockLen}); readCount = ${readCount}, completedReads = ${completedReads}`)
|
||||
|
||||
// copy from read buffer to designated position
|
||||
sys.memcpy(-4097 - padding, ptr + completedReads, thisBlockLen)
|
||||
|
||||
// increment readCount properly
|
||||
readCount += thisBlockLen
|
||||
completedReads += thisBlockLen
|
||||
}
|
||||
}
|
||||
|
||||
//serial.println(`END readBytes(${length}); readCount = ${readCount}\n`)
|
||||
|
||||
return ptr
|
||||
}
|
||||
|
||||
function readInt() {
|
||||
let b = readBytes(4)
|
||||
let i = (sys.peek(b) & 255) | ((sys.peek(b+1) & 255) << 8) | ((sys.peek(b+2) & 255) << 16) | ((sys.peek(b+3) & 255) << 24)
|
||||
|
||||
//serial.println(`readInt(); bytes: ${sys.peek(b)}, ${sys.peek(b+1)}, ${sys.peek(b+2)}, ${sys.peek(b+3)} = ${i}\n`)
|
||||
|
||||
sys.free(b)
|
||||
return i
|
||||
}
|
||||
|
||||
function readShort() {
|
||||
let b = readBytes(2)
|
||||
let i = (sys.peek(b) & 255) | ((sys.peek(b+1) & 255) << 8)
|
||||
|
||||
//serial.println(`readShort(); bytes: ${sys.peek(b)}, ${sys.peek(b+1)} = ${i}\n`)
|
||||
|
||||
sys.free(b)
|
||||
return i
|
||||
}
|
||||
|
||||
function readByte() {
|
||||
let b = readBytes(1)
|
||||
let i = (sys.peek(b) & 255)
|
||||
|
||||
//serial.println(`readShort(); bytes: ${sys.peek(b)}, ${sys.peek(b+1)} = ${i}\n`)
|
||||
|
||||
sys.free(b)
|
||||
return i
|
||||
}
|
||||
|
||||
|
||||
let magic = readBytes(8)
|
||||
let magicMatching = true
|
||||
|
||||
// check if magic number matches
|
||||
MAGIC.forEach((b,i) => {
|
||||
let testb = sys.peek(magic + i) & 255 // for some reason this must be located here
|
||||
if (testb != b) {
|
||||
magicMatching = false
|
||||
}
|
||||
})
|
||||
sys.free(magic)
|
||||
if (!magicMatching) {
|
||||
println("Not an IPF file (MAGIC mismatch)")
|
||||
return 1
|
||||
}
|
||||
|
||||
let imgw = readShort()
|
||||
let imgh = readShort()
|
||||
let hasAlpha = (readShort() != 0)
|
||||
sys.free(readBytes(10)) // skip 10 bytes
|
||||
|
||||
// TODO: gzip
|
||||
|
||||
function clampRGB(f) {
|
||||
return (f > 1.0) ? 1.0 : (f < 0.0) ? 0.0 : f
|
||||
}
|
||||
|
||||
function ycocgToRGB(co1, co2, cg1, cg2, ys, as) { // ys: 4 Y-values
|
||||
// return [R1|G1, B1|A1, R2|G2, B2|A2, R3|G3, B3|A3, R4|G4, B4|A4]
|
||||
|
||||
// cocg = 0x7777
|
||||
// ys = 0x7777
|
||||
|
||||
co1 = (co1 - 7) / 8.0
|
||||
co2 = (co2 - 7) / 8.0
|
||||
cg1 = (cg1 - 7) / 8.0
|
||||
cg2 = (cg2 - 7) / 8.0
|
||||
|
||||
let y1 = (ys & 15) / 15.0
|
||||
let a1 = as & 15
|
||||
let tmp = y1 - cg1 / 2.0
|
||||
let g1 = clampRGB(cg1 + tmp)
|
||||
let b1 = clampRGB(tmp - co1 / 2.0)
|
||||
let r1 = clampRGB(b1 + co1)
|
||||
|
||||
let y2 = ((ys >>> 4) & 15) / 15.0
|
||||
let a2 = (as >>> 4) & 15
|
||||
tmp = y2 - cg1 / 2.0
|
||||
let g2 = clampRGB(cg1 + tmp)
|
||||
let b2 = clampRGB(tmp - co1 / 2.0)
|
||||
let r2 = clampRGB(b2 + co1)
|
||||
|
||||
let y3 = ((ys >>> 8) & 15) / 15.0
|
||||
let a3 = (as >>> 8) & 15
|
||||
tmp = y3 - cg2 / 2.0
|
||||
let g3 = clampRGB(cg2 + tmp)
|
||||
let b3 = clampRGB(tmp - co2 / 2.0)
|
||||
let r3 = clampRGB(b3 + co2)
|
||||
|
||||
let y4 = ((ys >>> 12) & 15) / 15.0
|
||||
let a4 = (as >>> 12) & 15
|
||||
tmp = y4 - cg2 / 2.0
|
||||
let g4 = clampRGB(cg2 + tmp)
|
||||
let b4 = clampRGB(tmp - co2 / 2.0)
|
||||
let r4 = clampRGB(b4 + co2)
|
||||
|
||||
return [
|
||||
(Math.round(r1 * 15) << 4) | Math.round(g1 * 15),
|
||||
(Math.round(b1 * 15) << 4) | a1,
|
||||
(Math.round(r2 * 15) << 4) | Math.round(g2 * 15),
|
||||
(Math.round(b2 * 15) << 4) | a2,
|
||||
(Math.round(r3 * 15) << 4) | Math.round(g3 * 15),
|
||||
(Math.round(b3 * 15) << 4) | a3,
|
||||
(Math.round(r4 * 15) << 4) | Math.round(g4 * 15),
|
||||
(Math.round(b4 * 15) << 4) | a4,
|
||||
]
|
||||
}
|
||||
|
||||
graphics.setGraphicsMode(4)
|
||||
|
||||
for (let blockY = 0; blockY < Math.ceil(imgh / 4.0); blockY++) {
|
||||
for (let blockX = 0; blockX < Math.ceil(imgw / 4.0); blockX++) {
|
||||
let rg = new Uint8Array(16) // [R1G1, R2G2, R3G3, R4G4, ...]
|
||||
let ba = new Uint8Array(16)
|
||||
|
||||
let co = readInt()
|
||||
let cg = readInt()
|
||||
let y1 = readShort()
|
||||
let y2 = readShort()
|
||||
let y3 = readShort()
|
||||
let y4 = readShort()
|
||||
|
||||
let a1 = 65535; let a2 = 65535; let a3 = 65535; let a4 = 65535
|
||||
|
||||
if (hasAlpha) {
|
||||
a1 = readShort()
|
||||
a2 = readShort()
|
||||
a3 = readShort()
|
||||
a4 = readShort()
|
||||
}
|
||||
|
||||
let corner = ycocgToRGB(co & 15, (co >> 8) & 15, cg & 15, (cg >> 8) & 15, y1, a1)
|
||||
rg[0] = corner[0];ba[0] = corner[1]
|
||||
rg[1] = corner[2];ba[1] = corner[3]
|
||||
rg[4] = corner[4];ba[4] = corner[5]
|
||||
rg[5] = corner[6];ba[5] = corner[7]
|
||||
|
||||
corner = ycocgToRGB((co >> 4) & 15, (co >> 12) & 15, (cg >> 4) & 15, (cg >> 12) & 15, y2, a2)
|
||||
rg[2] = corner[0];ba[2] = corner[1]
|
||||
rg[3] = corner[2];ba[3] = corner[3]
|
||||
rg[6] = corner[4];ba[6] = corner[5]
|
||||
rg[7] = corner[6];ba[7] = corner[7]
|
||||
|
||||
corner = ycocgToRGB((co >> 16) & 15, (co >> 24) & 15, (cg >> 16) & 15, (cg >> 24) & 15, y3, a3)
|
||||
rg[8] = corner[0];ba[8] = corner[1]
|
||||
rg[9] = corner[2];ba[9] = corner[3]
|
||||
rg[12] = corner[4];ba[12] = corner[5]
|
||||
rg[13] = corner[6];ba[13] = corner[7]
|
||||
|
||||
corner = ycocgToRGB((co >> 20) & 15, (co >> 28) & 15, (cg >> 20) & 15, (cg >> 28) & 15, y4, a4)
|
||||
rg[10] = corner[0];ba[10] = corner[1]
|
||||
rg[11] = corner[2];ba[11] = corner[3]
|
||||
rg[14] = corner[4];ba[14] = corner[5]
|
||||
rg[15] = corner[6];ba[15] = corner[7]
|
||||
|
||||
|
||||
// move decoded pixels into memory
|
||||
for (let py = 0; py < 4; py++) { for (let px = 0; px < 4; px++) {
|
||||
let ox = blockX * 4 + px
|
||||
let oy = blockY * 4 + py
|
||||
let offset = oy * 560 + ox
|
||||
sys.poke(-1048577 - offset, rg[py * 4 + px])
|
||||
sys.poke(-1310721 - offset, ba[py * 4 + px])
|
||||
}}
|
||||
}}
|
||||
@@ -1,244 +0,0 @@
|
||||
/*
|
||||
TSVM Interchangeable Picture Format
|
||||
|
||||
Image is divided into 4x4 blocks and each block is serialised, then the entire file is gzipped
|
||||
|
||||
|
||||
# File Structure
|
||||
\x1F T S V M i P F
|
||||
[HEADER]
|
||||
[Blocks.gz]
|
||||
|
||||
- Header
|
||||
uint16 WIDTH
|
||||
uint16 HEIGHT
|
||||
uint16 HAS ALPHA
|
||||
uint8 0 (IPF CONFIG INDICATOR)
|
||||
byte[9] RESERVED
|
||||
|
||||
- *.gz
|
||||
uint32 UNCOMPRESSED SIZE
|
||||
* PAYLOAD
|
||||
|
||||
- Blocks
|
||||
4x4 pixels are sampled, then divided into YCoCg planes.
|
||||
CoCg planes are "chroma subsampled" by 4:2:0, then quantised to 4 bits (8 bits for CoCg combined)
|
||||
Y plane is quantised to 4 bits
|
||||
|
||||
By doing so, CoCg planes will reduce to 4 pixels
|
||||
For the description of packing, pixels in Y plane will be numbered as:
|
||||
0 1 2 3
|
||||
4 5 6 7
|
||||
8 9 A B
|
||||
C D E F
|
||||
|
||||
Bits are packed like so:
|
||||
|
||||
uint32 SUBSAMPLING MASK (unimplemented; dont write this)
|
||||
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]
|
||||
uint16 [Y3 | Y2 | Y7 | Y6]
|
||||
uint16 [Y9 | Y8 | YD | YC]
|
||||
uint16 [YB | YA | YF | YE]
|
||||
(total: 12 bytes)
|
||||
|
||||
If has alpha, append following bytes for alpha values
|
||||
uint16 [a1 | a0 | a5 | a4]
|
||||
uint16 [a3 | a2 | a7 | a6]
|
||||
uint16 [a9 | a8 | aD | aC]
|
||||
uint16 [aB | aA | aF | aE]
|
||||
(total: 20 bytes)
|
||||
|
||||
Subsampling mask:
|
||||
|
||||
Least significant byte for top-left, most significant for bottom-right
|
||||
For example, this default pattern
|
||||
|
||||
00 00 01 01
|
||||
00 00 01 01
|
||||
10 10 11 11
|
||||
10 10 11 11
|
||||
|
||||
turns into:
|
||||
|
||||
01010000 -> 0x30
|
||||
01010000 -> 0x30
|
||||
11111010 -> 0xFA
|
||||
11111010 -> 0xFA
|
||||
|
||||
which packs into: [ 30 | 30 | FA | FA ] (because little endian)
|
||||
|
||||
- IPF CONFIG INDICATOR:
|
||||
|
||||
0 for 4:2:0 Chroma subsampling for both Co and Cg (iPF Type 1)
|
||||
1 for 4:2:2 Chroma subsampling for Co, but 4:2:0 for Cg (NOT recommended; unused)
|
||||
2 for 4:2:2 Chroma subsampling for Cg, but 4:2:0 for Co (Recommended over type 1; unused)
|
||||
3 for 4:2:2 Chroma subsampling for both Co and Cg (iPF Type 2)
|
||||
|
||||
*/
|
||||
|
||||
if (!exec_args[2]) {
|
||||
printerrln("Usage: encodeipf input.jpg output.ipf [/noalpha]")
|
||||
return 1
|
||||
}
|
||||
|
||||
let configUseAlpha = !(exec_args[3] != undefined && exec_args[3].toLowerCase() == "/noalpha")
|
||||
|
||||
let pattern = 0
|
||||
|
||||
filesystem.open("A", exec_args[1], "R")
|
||||
|
||||
let status = com.getStatusCode(0)
|
||||
let infile = undefined
|
||||
if (0 != status) return status
|
||||
|
||||
// read file
|
||||
let fileLen = filesystem.getFileLen("A")
|
||||
infile = sys.malloc(fileLen)
|
||||
dma.comToRam(0, 0, infile, fileLen)
|
||||
|
||||
// decode
|
||||
const [imgw, imgh, channels, imageData] = graphics.decodeImage(infile, fileLen) // stored as [R | G | B | (A)]
|
||||
sys.free(infile)
|
||||
let hasAlpha = (4 == channels) && configUseAlpha
|
||||
let outBlock = sys.malloc(64)
|
||||
let blockSize = Math.ceil(imgh / 4.0) * Math.ceil(imgw / 4.0)
|
||||
let blockWidth = Math.ceil(imgw / 4.0)
|
||||
|
||||
println(`Dim: ${imgw}x${imgh}, channels: ${channels}, Has alpha: ${hasAlpha}`)
|
||||
|
||||
// TODO write output to dedicated ptr and gzip it
|
||||
let writeCount = 0
|
||||
let writeBuf = sys.malloc(blockSize * ((hasAlpha) ? 20 : 12))
|
||||
|
||||
let bayerKernels = [
|
||||
[
|
||||
0,8,2,10,
|
||||
12,4,14,6,
|
||||
3,11,1,9,
|
||||
15,7,13,5,
|
||||
],
|
||||
[
|
||||
8,2,10,0,
|
||||
4,14,6,12,
|
||||
11,1,9,3,
|
||||
7,13,5,15,
|
||||
],
|
||||
[
|
||||
7,13,5,15,
|
||||
8,2,10,0,
|
||||
4,14,6,12,
|
||||
11,1,9,3,
|
||||
],
|
||||
[
|
||||
15,7,13,5,
|
||||
0,8,2,10,
|
||||
12,4,14,6,
|
||||
3,11,1,9,
|
||||
]
|
||||
].map(it => it.map(it => (it + 0.5) / 16))
|
||||
|
||||
function chromaToFourBits(f) {
|
||||
let r = Math.round(f * 8) + 7
|
||||
return (r < 0) ? 0 : (r > 15) ? 15 : r
|
||||
}
|
||||
|
||||
for (let blockY = 0; blockY < Math.ceil(imgh / 4.0); blockY++) {
|
||||
for (let blockX = 0; blockX < Math.ceil(imgw / 4.0); blockX++) {
|
||||
// println(`Encoding block ${1 + blockY * blockWidth + blockX}/${blockSize}`) // print statement is making things slower...
|
||||
|
||||
let ys = new Uint8Array(16)
|
||||
let as = new Uint8Array(16)
|
||||
let cos = new Float32Array(16)
|
||||
let cgs = new Float32Array(16)
|
||||
|
||||
for (let py = 0; py < 4; py++) { for (let px = 0; px < 4; px++) {
|
||||
// TODO oob-check
|
||||
let ox = blockX * 4 + px
|
||||
let oy = blockY * 4 + py
|
||||
let t = bayerKernels[pattern % bayerKernels.length][4 * (py % 4) + (px % 4)]
|
||||
let offset = channels * (oy * imgw + ox)
|
||||
|
||||
let r0 = sys.peek(imageData + offset) / 255.0
|
||||
let g0 = sys.peek(imageData + offset+1) / 255.0
|
||||
let b0 = sys.peek(imageData + offset+2) / 255.0
|
||||
let a0 = (hasAlpha) ? sys.peek(imageData + offset+3) / 255.0 : 1.0
|
||||
|
||||
let r = Math.floor((t / 15 + r0) * 15) / 15
|
||||
let g = Math.floor((t / 15 + g0) * 15) / 15
|
||||
let b = Math.floor((t / 15 + b0) * 15) / 15
|
||||
let a = Math.floor((t / 15 + a0) * 15) / 15
|
||||
|
||||
let co = r - b // [-1..1]
|
||||
let tmp = b + co / 2.0
|
||||
let cg = g - tmp // [-1..1]
|
||||
let y = tmp + cg / 2.0 // [0..1]
|
||||
|
||||
let index = py * 4 + px
|
||||
ys[index] = Math.round(y * 15)
|
||||
as[index] = Math.round(a * 15)
|
||||
cos[index] = co
|
||||
cgs[index] = cg
|
||||
}}
|
||||
|
||||
// subsample by averaging
|
||||
let cos1 = chromaToFourBits((cos[0]+cos[1]+cos[4]+cos[5]) / 4.0)
|
||||
let cos2 = chromaToFourBits((cos[2]+cos[3]+cos[6]+cos[7]) / 4.0)
|
||||
let cos3 = chromaToFourBits((cos[8]+cos[9]+cos[12]+cos[13]) / 4.0)
|
||||
let cos4 = chromaToFourBits((cos[10]+cos[11]+cos[14]+cos[15]) / 4.0)
|
||||
let cgs1 = chromaToFourBits((cgs[0]+cgs[1]+cgs[4]+cgs[5]) / 4.0)
|
||||
let cgs2 = chromaToFourBits((cgs[2]+cgs[3]+cgs[6]+cgs[7]) / 4.0)
|
||||
let cgs3 = chromaToFourBits((cgs[8]+cgs[9]+cgs[12]+cgs[13]) / 4.0)
|
||||
let cgs4 = chromaToFourBits((cgs[10]+cgs[11]+cgs[14]+cgs[15]) / 4.0)
|
||||
|
||||
// append encoded blocks to the file
|
||||
let outBlock = writeBuf + writeCount
|
||||
|
||||
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])
|
||||
|
||||
if (hasAlpha) {
|
||||
sys.poke(outBlock+12, (as[1] << 4) | as[0])
|
||||
sys.poke(outBlock+13, (as[5] << 4) | as[4])
|
||||
sys.poke(outBlock+14, (as[3] << 4) | as[2])
|
||||
sys.poke(outBlock+15, (as[7] << 4) | as[6])
|
||||
sys.poke(outBlock+16, (as[9] << 4) | as[8])
|
||||
sys.poke(outBlock+17, (as[13] << 4) | as[12])
|
||||
sys.poke(outBlock+18, (as[11] << 4) | as[10])
|
||||
sys.poke(outBlock+19, (as[15] << 4) | as[14])
|
||||
writeCount += 8
|
||||
}
|
||||
writeCount += 12
|
||||
|
||||
}}
|
||||
|
||||
// write header to the output file
|
||||
let headerBytes = [
|
||||
0x1F, 0x54, 0x53, 0x56, 0x4D, 0x69, 0x50, 0x46, // magic
|
||||
imgw & 255, (imgw >>> 8) & 255, // width
|
||||
imgh & 255, (imgh >>> 8) & 255, // height
|
||||
((hasAlpha) ? 1 : 0), 0x00, // has alpha, iPF type 1
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 // reserved
|
||||
]
|
||||
|
||||
filesystem.open("A", exec_args[2], "W")
|
||||
filesystem.writeBytes("A", headerBytes)
|
||||
filesystem.open("A", exec_args[2], "A")
|
||||
dma.ramToCom(writeBuf, 0, writeCount)
|
||||
|
||||
sys.free(outBlock)
|
||||
sys.free(imageData)
|
||||
sys.free(writeBuf)
|
||||
@@ -1,262 +0,0 @@
|
||||
/*
|
||||
TSVM Interchangeable Picture Format
|
||||
|
||||
Image is divided into 4x4 blocks and each block is serialised, then the entire file is gzipped
|
||||
|
||||
|
||||
# File Structure
|
||||
\x1F T S V M i P F
|
||||
[HEADER]
|
||||
[Blocks.gz]
|
||||
|
||||
- Header
|
||||
uint16 WIDTH
|
||||
uint16 HEIGHT
|
||||
uint16 HAS ALPHA
|
||||
uint8 3 (IPF CONFIG INDICATOR)
|
||||
byte[9] RESERVED
|
||||
|
||||
- *.gz
|
||||
uint32 UNCOMPRESSED SIZE
|
||||
* PAYLOAD
|
||||
|
||||
- Blocks
|
||||
4x4 pixels are sampled, then divided into YCoCg planes.
|
||||
CoCg planes are "chroma subsampled" by 4:2:0, then quantised to 4 bits (8 bits for CoCg combined)
|
||||
Y plane is quantised to 4 bits
|
||||
|
||||
By doing so, CoCg planes will reduce to 4 pixels
|
||||
For the description of packing, pixels in Y plane will be numbered as:
|
||||
0 1 2 3
|
||||
4 5 6 7
|
||||
8 9 A B
|
||||
C D E F
|
||||
|
||||
Bits are packed like so:
|
||||
|
||||
uint32 SUBSAMPLING MASK (unimplemented; dont write this)
|
||||
uint8 [Co-2 | Co-1]
|
||||
uint8 [Co-4 | Co-3]
|
||||
uint8 [Co-6 | Co-5]
|
||||
uint8 [Co-8 | Co-7]
|
||||
uint8 [Cg-2 | Cg-1]
|
||||
uint8 [Cg-4 | Cg-3]
|
||||
uint8 [Cg-6 | Cg-5]
|
||||
uint8 [Cg-8 | Cg-7]
|
||||
uint16 [Y1 | Y0 | Y5 | Y4]
|
||||
uint16 [Y3 | Y2 | Y7 | Y6]
|
||||
uint16 [Y9 | Y8 | YD | YC]
|
||||
uint16 [YB | YA | YF | YE]
|
||||
(total: 16 bytes)
|
||||
|
||||
If has alpha, append following bytes for alpha values
|
||||
uint16 [a1 | a0 | a5 | a4]
|
||||
uint16 [a3 | a2 | a7 | a6]
|
||||
uint16 [a9 | a8 | aD | aC]
|
||||
uint16 [aB | aA | aF | aE]
|
||||
(total: 24 bytes)
|
||||
|
||||
Subsampling mask:
|
||||
|
||||
Least significant byte for top-left, most significant for bottom-right
|
||||
For example, this default pattern
|
||||
|
||||
00 00 01 01
|
||||
00 00 01 01
|
||||
10 10 11 11
|
||||
10 10 11 11
|
||||
|
||||
turns into:
|
||||
|
||||
01010000 -> 0x30
|
||||
01010000 -> 0x30
|
||||
11111010 -> 0xFA
|
||||
11111010 -> 0xFA
|
||||
|
||||
which packs into: [ 30 | 30 | FA | FA ] (because little endian)
|
||||
|
||||
- IPF CONFIG INDICATOR:
|
||||
|
||||
0 for 4:2:0 Chroma subsampling for both Co and Cg (iPF Type 1)
|
||||
1 for 4:2:2 Chroma subsampling for Co, but 4:2:0 for Cg (NOT recommended; unused)
|
||||
2 for 4:2:2 Chroma subsampling for Cg, but 4:2:0 for Co (Recommended over type 1; unused)
|
||||
3 for 4:2:2 Chroma subsampling for both Co and Cg (iPF Type 2)
|
||||
|
||||
*/
|
||||
|
||||
if (!exec_args[2]) {
|
||||
printerrln("Usage: encodeipf input.jpg output.ipf [/noalpha]")
|
||||
return 1
|
||||
}
|
||||
|
||||
let configUseAlpha = !(exec_args[3] != undefined && exec_args[3].toLowerCase() == "/noalpha")
|
||||
|
||||
let pattern = 0
|
||||
|
||||
filesystem.open("A", exec_args[1], "R")
|
||||
|
||||
let status = com.getStatusCode(0)
|
||||
let infile = undefined
|
||||
if (0 != status) return status
|
||||
|
||||
// read file
|
||||
let fileLen = filesystem.getFileLen("A")
|
||||
infile = sys.malloc(fileLen)
|
||||
dma.comToRam(0, 0, infile, fileLen)
|
||||
|
||||
// decode
|
||||
const [imgw, imgh, channels, imageData] = graphics.decodeImage(infile, fileLen) // stored as [R | G | B | (A)]
|
||||
sys.free(infile)
|
||||
let hasAlpha = (4 == channels) && configUseAlpha
|
||||
let outBlock = sys.malloc(64)
|
||||
let blockSize = Math.ceil(imgh / 4.0) * Math.ceil(imgw / 4.0)
|
||||
let blockWidth = Math.ceil(imgw / 4.0)
|
||||
|
||||
println(`Dim: ${imgw}x${imgh}, channels: ${channels}, Has alpha: ${hasAlpha}`)
|
||||
|
||||
// TODO write output to dedicated ptr and gzip it
|
||||
let writeCount = 0
|
||||
let writeBuf = sys.malloc(blockSize * ((hasAlpha) ? 24 : 16))
|
||||
|
||||
let bayerKernels = [
|
||||
[
|
||||
0,8,2,10,
|
||||
12,4,14,6,
|
||||
3,11,1,9,
|
||||
15,7,13,5,
|
||||
],
|
||||
[
|
||||
8,2,10,0,
|
||||
4,14,6,12,
|
||||
11,1,9,3,
|
||||
7,13,5,15,
|
||||
],
|
||||
[
|
||||
7,13,5,15,
|
||||
8,2,10,0,
|
||||
4,14,6,12,
|
||||
11,1,9,3,
|
||||
],
|
||||
[
|
||||
15,7,13,5,
|
||||
0,8,2,10,
|
||||
12,4,14,6,
|
||||
3,11,1,9,
|
||||
]
|
||||
].map(it => it.map(it => (it + 0.5) / 16))
|
||||
|
||||
function chromaToFourBits(f) {
|
||||
let r = Math.round(f * 8) + 7
|
||||
return (r < 0) ? 0 : (r > 15) ? 15 : r
|
||||
}
|
||||
|
||||
for (let blockY = 0; blockY < Math.ceil(imgh / 4.0); blockY++) {
|
||||
for (let blockX = 0; blockX < Math.ceil(imgw / 4.0); blockX++) {
|
||||
// println(`Encoding block ${1 + blockY * blockWidth + blockX}/${blockSize}`) // print statement is making things slower...
|
||||
|
||||
let ys = new Uint8Array(16)
|
||||
let as = new Uint8Array(16)
|
||||
let cos = new Float32Array(16)
|
||||
let cgs = new Float32Array(16)
|
||||
|
||||
for (let py = 0; py < 4; py++) { for (let px = 0; px < 4; px++) {
|
||||
// TODO oob-check
|
||||
let ox = blockX * 4 + px
|
||||
let oy = blockY * 4 + py
|
||||
let t = bayerKernels[pattern % bayerKernels.length][4 * (py % 4) + (px % 4)]
|
||||
let offset = channels * (oy * imgw + ox)
|
||||
|
||||
let r0 = sys.peek(imageData + offset) / 255.0
|
||||
let g0 = sys.peek(imageData + offset+1) / 255.0
|
||||
let b0 = sys.peek(imageData + offset+2) / 255.0
|
||||
let a0 = (hasAlpha) ? sys.peek(imageData + offset+3) / 255.0 : 1.0
|
||||
|
||||
let r = Math.floor((t / 15 + r0) * 15) / 15
|
||||
let g = Math.floor((t / 15 + g0) * 15) / 15
|
||||
let b = Math.floor((t / 15 + b0) * 15) / 15
|
||||
let a = Math.floor((t / 15 + a0) * 15) / 15
|
||||
|
||||
let co = r - b // [-1..1]
|
||||
let tmp = b + co / 2.0
|
||||
let cg = g - tmp // [-1..1]
|
||||
let y = tmp + cg / 2.0 // [0..1]
|
||||
|
||||
let index = py * 4 + px
|
||||
ys[index] = Math.round(y * 15)
|
||||
as[index] = Math.round(a * 15)
|
||||
cos[index] = co
|
||||
cgs[index] = cg
|
||||
}}
|
||||
|
||||
// subsample by averaging
|
||||
let cos1 = chromaToFourBits((cos[0]+cos[1]) / 2.0)
|
||||
let cos2 = chromaToFourBits((cos[2]+cos[3]) / 2.0)
|
||||
let cos3 = chromaToFourBits((cos[4]+cos[5]) / 2.0)
|
||||
let cos4 = chromaToFourBits((cos[6]+cos[7]) / 2.0)
|
||||
let cos5 = chromaToFourBits((cos[8]+cos[9]) / 2.0)
|
||||
let cos6 = chromaToFourBits((cos[10]+cos[11]) / 2.0)
|
||||
let cos7 = chromaToFourBits((cos[12]+cos[13]) / 2.0)
|
||||
let cos8 = chromaToFourBits((cos[14]+cos[15]) / 2.0)
|
||||
|
||||
let cgs1 = chromaToFourBits((cgs[0]+cgs[1]) / 2.0)
|
||||
let cgs2 = chromaToFourBits((cgs[2]+cgs[3]) / 2.0)
|
||||
let cgs3 = chromaToFourBits((cgs[4]+cgs[5]) / 2.0)
|
||||
let cgs4 = chromaToFourBits((cgs[6]+cgs[7]) / 2.0)
|
||||
let cgs5 = chromaToFourBits((cgs[8]+cgs[9]) / 2.0)
|
||||
let cgs6 = chromaToFourBits((cgs[10]+cgs[11]) / 2.0)
|
||||
let cgs7 = chromaToFourBits((cgs[12]+cgs[13]) / 2.0)
|
||||
let cgs8 = chromaToFourBits((cgs[14]+cgs[15]) / 2.0)
|
||||
|
||||
|
||||
// append encoded blocks to the file
|
||||
let outBlock = writeBuf + writeCount
|
||||
|
||||
sys.poke(outBlock+ 0, (cos2 << 4) | cos1)
|
||||
sys.poke(outBlock+ 1, (cos4 << 4) | cos3)
|
||||
sys.poke(outBlock+ 2, (cos6 << 4) | cos5)
|
||||
sys.poke(outBlock+ 3, (cos8 << 4) | cos7)
|
||||
sys.poke(outBlock+ 4, (cgs2 << 4) | cgs1)
|
||||
sys.poke(outBlock+ 5, (cgs4 << 4) | cgs3)
|
||||
sys.poke(outBlock+ 6, (cgs6 << 4) | cgs5)
|
||||
sys.poke(outBlock+ 7, (cgs8 << 4) | cgs7)
|
||||
sys.poke(outBlock+ 8, (ys[1] << 4) | ys[0])
|
||||
sys.poke(outBlock+ 9, (ys[5] << 4) | ys[4])
|
||||
sys.poke(outBlock+10, (ys[3] << 4) | ys[2])
|
||||
sys.poke(outBlock+11, (ys[7] << 4) | ys[6])
|
||||
sys.poke(outBlock+12, (ys[9] << 4) | ys[8])
|
||||
sys.poke(outBlock+13, (ys[13] << 4) | ys[12])
|
||||
sys.poke(outBlock+14, (ys[11] << 4) | ys[10])
|
||||
sys.poke(outBlock+15, (ys[15] << 4) | ys[14])
|
||||
|
||||
if (hasAlpha) {
|
||||
sys.poke(outBlock+16, (as[1] << 4) | as[0])
|
||||
sys.poke(outBlock+17, (as[5] << 4) | as[4])
|
||||
sys.poke(outBlock+18, (as[3] << 4) | as[2])
|
||||
sys.poke(outBlock+19, (as[7] << 4) | as[6])
|
||||
sys.poke(outBlock+20, (as[9] << 4) | as[8])
|
||||
sys.poke(outBlock+21, (as[13] << 4) | as[12])
|
||||
sys.poke(outBlock+22, (as[11] << 4) | as[10])
|
||||
sys.poke(outBlock+23, (as[15] << 4) | as[14])
|
||||
writeCount += 8
|
||||
}
|
||||
writeCount += 16
|
||||
|
||||
}}
|
||||
|
||||
// write header to the output file
|
||||
let headerBytes = [
|
||||
0x1F, 0x54, 0x53, 0x56, 0x4D, 0x69, 0x50, 0x46, // magic
|
||||
imgw & 255, (imgw >>> 8) & 255, // width
|
||||
imgh & 255, (imgh >>> 8) & 255, // height
|
||||
((hasAlpha) ? 1 : 0), 0x01, // has alpha, iPF Type 2
|
||||
0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 // reserved
|
||||
]
|
||||
|
||||
filesystem.open("A", exec_args[2], "W")
|
||||
filesystem.writeBytes("A", headerBytes)
|
||||
filesystem.open("A", exec_args[2], "A")
|
||||
dma.ramToCom(writeBuf, 0, writeCount)
|
||||
|
||||
sys.free(outBlock)
|
||||
sys.free(imageData)
|
||||
sys.free(writeBuf)
|
||||
BIN
assets/disk0/kodim23.png
Normal file
BIN
assets/disk0/kodim23.png
Normal file
Binary file not shown.
|
After Width: | Height: | Size: 410 KiB |
@@ -426,8 +426,8 @@ Image is divided into 4x4 blocks and each block is serialised, then the entire i
|
||||
uint16 HEIGHT
|
||||
uint8 HAS ALPHA
|
||||
uint8 IPF Type
|
||||
0: Type 1
|
||||
1: Type 2
|
||||
0: Type 1 (4:2:0 chroma subsampling)
|
||||
1: Type 2 (4:2:2 chroma subsampling)
|
||||
byte[10] RESERVED
|
||||
|
||||
- *.gz
|
||||
@@ -448,7 +448,6 @@ Image is divided into 4x4 blocks and each block is serialised, then the entire i
|
||||
|
||||
Bits are packed like so:
|
||||
|
||||
uint32 SUBSAMPLING MASK (unimplemented; dont write this)
|
||||
uint8 [Cg-Top Left | Co-Top Left]
|
||||
uint16 [Y1 | Y0 | Y5 | Y4]
|
||||
uint8 [Cg-Top Right | Co-Top Right]
|
||||
|
||||
Reference in New Issue
Block a user