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PR to add native support for Brother/PES (WIP!) #139

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PR to add native support for Brother/PES (WIP!) #139

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3abb01c
Start working on support for PES v1 respectively PEC
maehw Jan 6, 2025
e50884b
Trying to get the numbers for PES/PEC right (stitch list still missing)
maehw Jan 6, 2025
1dd392f
PoC for PES files
maehw Jan 11, 2025
ffe115f
Remove nested function pecEncode() from TurtleShepherd.prototype.toPE…
maehw Jan 12, 2025
de17bb6
Work on PES/PEC stitch encoding
maehw Jan 13, 2025
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18 changes: 17 additions & 1 deletion stitchcode/gui.js
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Original file line number Diff line number Diff line change
Expand Up @@ -1473,9 +1473,17 @@ IDE_Morph.prototype.createStatusDisplay = function () {
function () { myself.downloadDST(); },
'Export as Tajima/DST'
);
downloadDSTButton.newLines = 2.7;
downloadDSTButton.newLines = 1.7;
elements.push(downloadDSTButton);

var downloadPESButton = new PushButtonMorph(
null,
function () { myself.downloadPES(); },
'Export as Brother/PES'
);
downloadPESButton.newLines = 1.7;
elements.push(downloadPESButton);

if (DEBUG) {
elements.push(' DEBUG MODE: true');
element = new StringMorph("");
Expand Down Expand Up @@ -1593,6 +1601,14 @@ IDE_Morph.prototype.downloadDST = function() {
saveAs(blob, name + '.dst');
};

// PES export
IDE_Morph.prototype.downloadPES = function() {
var name = this.projectName ? this.projectName : 'turtlestitch';
expUintArr = this.stage.turtleShepherd.toPES(name);
blob = new Blob([expUintArr], {type: 'application/octet-stream'});
saveAs(blob, name + '.pes');
};

// PNG export
IDE_Morph.prototype.downloadPNG = function() {
var name = this.projectName ? this.projectName : 'turtlestitch';
Expand Down
186 changes: 186 additions & 0 deletions stitchcode/turtleShepherd.js
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Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,7 @@
Embroidery function for Javscript
------------------------------------------------------------------
Copyright (C) 2016-2021 Michael Aschauer
Copyright (C) 2025 maehw

*/

Expand Down Expand Up @@ -843,6 +844,191 @@ TurtleShepherd.prototype.toDST = function(name="noname") {
return expUintArr;
};

TurtleShepherd.prototype.toPES = function(name="noname") {
var expArr = [];

function writeString(str, length=null, padWithSpace=true) {
if(length === null) {
length = str.length;
}
for(var i = 0; i<length; i++) {
if (i < str.length) {
expArr.push(str[i].charCodeAt(0));
} else {
if (padWithSpace) {
expArr.push(0x20);
} else {
expArr.push(0x00);
}
}
}
}

function writeInt16Le(value) {
expArr.push((value >> 0) & 0xFF);
expArr.push((value >> 8) & 0xFF);
}

function writeInt24Le(value) {
expArr.push((value >> 0) & 0xFF);
expArr.push((value >> 8) & 0xFF);
expArr.push((value >> 16) & 0xFF);
}

function writeInt32Le(value) {
expArr.push((value >> 0) & 0xFF);
expArr.push((value >> 8) & 0xFF);
expArr.push((value >> 16) & 0xFF);
expArr.push((value >> 24) & 0xFF);
}

function updateInt24Le(value, pos) {
expArr[pos] = (value >> 0) & 0xFF;
expArr[pos+1] = (value >> 8) & 0xFF;
expArr[pos+2] = (value >> 16) & 0xFF;
}

// identification and version
writeString("#PES0001");

// remaining PES v1 header section
writeInt32Le(0x16); // location of PEC block

writeInt16Le(0);
writeInt16Le(0);
writeInt16Le(0);
expArr.push(0xFF, 0xFF, 0, 0); // end of the header
// from here on, it's all PEC

// PEC header
const iconWidth = 48;
const iconWidthBytes = iconWidth/8; // icon width in bytes: icon width in pixels divided by 8 pixels per byte
const iconHeight = 38; // icon height (in pixels)
writeString("LA:" + name.substr(0, 8), 19, true); // 20 bytes name, typically truncated at 8 chars, padded with spaces
expArr.push(0x0D); // carriage return
writeString("", 12, true);
expArr.push(0xFF, 0x00);
expArr.push(iconWidthBytes);
expArr.push(iconHeight);
writeString("", 12, true);
// number of thread colors minus one, 0xFF means 0 colors;
// assume thread color and therefore write value 0 here
expArr.push(0);
// color index of that one thread color
expArr.push(1);
// fill the remaining space reserved for colors
writeString("", 462, true);

// PEC block
stitchBlockStartPos = expArr.length;
expArr.push(0, 0);
stitchBlockLenPos = expArr.length; // recall byte position where we place the spaceholder
writeInt24Le(0); // spaceholder for stitch block length
expArr.push(0x31, 0xFF, 0xF0);
width = 1000; // FIXME (is this in multiple of 0.1mm?)
height = 1000; // FIXME (is this in multiple of 0.1mm?)
writeInt16Le(width);
writeInt16Le(height);
writeInt16Le(0x1E0);
writeInt16Le(0x1B0);

// Perform actual encoding of PEC stitch list subsection
lastStitch = null;
hasFirst = false;
scale = this.scale;
// TODO: implement proper functionality
for (var i=0; i < this.cache.length; i++) {
if (this.cache[i].cmd == "color") {
} else if (this.cache[i].cmd == "move") {
stitch = this.cache[i];
if (!hasFirst) {
x0 = Math.round(stitch.x * scale);
y0 = -Math.round(stitch.y * scale);

dx = x0;
dy = y0;
lastStitch = {cmd: "move", x: x0, y: y0, penDown: stitch.penDown}
hasFirst = true;
} else if (hasFirst) {
x1 = Math.round(stitch.x * scale);
y1 = -Math.round(stitch.y * scale);
x0 = Math.round(lastStitch.x * scale);
y0 = -Math.round(lastStitch.y * scale);

dx = x1 - x0
dy = y1 - y0
}

// check whether to encode in short or long form;
// jump and trim stitches are probably not handled correctly at the moment (FIXME!)
dmax = Math.max(Math.abs(dx), Math.abs(dy));

if(stitch.penDown && dmax < 127) {
// short form (1 byte) indicated by MSBit=0; 7 bit for delta
expArr.push(dx & 0x7F, dy & 0x7F);

} else if(dmax < 2047) {
// long form (2 bytes) indicated by MSBit=1; 12 bit for delta
let msBits = 0x80;
//if(!stitch.penDown) {
// msBits |= 0x10; // make it a jump stitch (FIXME: doesn't work as expected)
//}
expArr.push(msBits | ((dx >> 8) & 0x0F));
expArr.push(dx & 0xFF);
expArr.push(msBits | ((dy >> 8) & 0x0F));
expArr.push(dy & 0xFF);
} else {

// TODO: cannot encode; break this down into multiple stitches?!
// are there other ways of communicating errors to the user?
console.log("PES/PEC export: cannot encode stitch!");
}

lastStitch = stitch;
}
}
// Mockery with dx and dy coordinates (in short form)
// delta of 0x0A represents 10 units of 0.1 mm each, i.e. 1 mm
// delta of 0x76 represents -10 units (MSBit 0; then 7 bit two's complement) of 0.1 mm each, i.e. 1 mm
/*
for (var i=0; i<20; i++) {
expArr.push(0x0A, 0x0A); // go diagonally
}
for (var i=0; i<20; i++) {
expArr.push(0x0A, 0x00); // go x only
}
for (var i=0; i<20; i++) {
expArr.push(0x00, 0x0A); // go y only
}
for (var i=0; i<20; i++) {
expArr.push(0x76, 0x00); // go -x only
}
for (var i=0; i<20; i++) {
expArr.push(0x00, 0x76); // go -y only
}
*/
expArr.push(0xFF); // file end

// calculate stitch block length value and update in the binary data
stitchBlockLen = expArr.length - stitchBlockStartPos;
updateInt24Le(stitchBlockLen, stitchBlockLenPos);

// PEC thumbnail images for every color (use chessboard alike pattern for now)
patternByte = 0xAA;
for (i=0;i<iconWidthBytes*iconHeight*2;i++) {
if(i % 6 == 0) {
// swap pattern bytes
patternByte = (patternByte == 0xAA) ? 0x55 : 0xAA;
}
expArr.push(patternByte);
}

expUintArr = new Uint8Array(expArr.length);
for (i=0;i<expArr.length;i++) {
expUintArr[i] = expArr[i];
}
return expUintArr;
}

TurtleShepherd.prototype.getStitchesAsArr = function () {
stitches = [];
Expand Down