console.log("hello from poseEditor.js") var canvas = null; var ctx = null; const wheelDisplayTime = 500; const limbSeq = [ [1, 2], [2, 3], [3, 4], // 右腕 [1, 5], [5, 6], [6, 7], // 左腕 [1, 8], [8, 9], [9, 10], // 右胴→右脚 [1, 11], [11, 12], [12, 13], // 左胴→左脚 [1, 0], // 首 [0, 14], [14, 16], // 右目 [0, 15], [15, 17] // 左目 ]; function findParentNodeIndex(nodeIndex) { // limbSeqの各要素の2番目の要素がjointIndexの場合、その要素の1番目の要素を返す // 見つからないばあいは-1を返す limbIndex = limbSeq.findIndex((limb) => limb[1] === nodeIndex); return limbIndex === -1 ? -1 : limbSeq[limbIndex][0]; } function cutOffLimb(pose, cutOffIndex) { console.log(`cutOffLimb: ${cutOffIndex}`); // 末端ノードの座標を削除する var newPose = deepCopy(pose); for (let i = 0; i < 18; i++) { if (newPose[i] == null) {continue;} // ルートまで検索し、その間にcuttOffIndexがあれば削除 var curr = i; while (curr !== 1) { console.log(`checking: ${i} -> ${curr}`); let parent = findParentNodeIndex(curr); if (parent === cutOffIndex) { console.log(`cutOffLimb: ${i} -> ${cutOffIndex}`); newPose[i] = null; break; } curr = parent; } } return newPose; } function repairPose(sourcePose) { // TODO: ループには対応してないかも var pose = sourcePose; var newPose = new Array(18) for (var k = 0; k < 3; k++) { var processed = 0; // イテレーション用 for (let i = 0; i < 18; i++) { if (pose[i] == null) { let parent = findParentNodeIndex(i); if (parent === -1) {continue;} // あり得ない if (pose[parent] == null) { console.log(`repair failed(A): ${i} -> parent loss`); continue; } // サンプルデータから引っ張ってくる var v = sampleCandidateSource[i].map((x, j) => x - sampleCandidateSource[parent][j]); newPose[i] = pose[parent].map((x, j) => x + v[j]); console.log(`repaired: ${i} -> ${newPose[newPose.length - 1]}`); processed++; } else { newPose[i] = pose[i].map(x => x); } } if (processed === 0) {break;} pose = newPose; } return newPose; } function deepCopy(arr) { return JSON.parse(JSON.stringify(arr)); } function distSq(p0, p1) { return (p0[0] - p1[0]) ** 2 + (p0[1] - p1[1]) ** 2; } // poseDataの形式:[[[x1, y1], [x2, y2], ...],[[x3, y3], [x4, y4], ...], ...] // 各要素が人間 // 人間の各要素が関節 function poseDataToCandidateAndSubset(poseData) { let candidate = []; let subset = []; for (let i = 0; i < poseData.length; i++) { let person = poseData[i]; let subsetElement = []; for (let j = 0; j < person.length; j++) { candidate.push(person[j]); subsetElement.push(candidate.length - 1); } subset.push(subsetElement); } return [candidate, subset]; } // サンプルデータ const sampleCandidateSource = [[235, 158],[234, 220],[193, 222],[138, 263],[89, 308],[276, 220],[325, 264],[375, 309],[207, 347],[203, 433],[199, 523],[261, 347],[262, 430],[261, 522],[227, 148],[245, 148],[208, 158],[258, 154]].map((p) => [p[0], p[1] - 70]); const sampleSubsetElementSource = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]; // const sampleCandidateSource = [[618.00, 0.00], [618.00, 44.00], [304.00, 81.00], [482.00, 96.00], [66.00, 270.00], [171.00, 280.00], [618.00, 82.00], [307.00, 112.00], [460.00, 143.00], [0.00, 301.00], [65.00, 301.00], [172.00, 303.00], [584.00, 86.00], [275.00, 119.00], [420.00, 139.00], [0.00, 301.00], [41.00, 301.00], [144.00, 303.00], [544.00, 131.00], [348.00, 139.00], [262.00, 160.00], [0.00, 337.00], [52.00, 339.00], [130.00, 348.00], [570.00, 175.00], [283.00, 177.00], [78.00, 338.00], [172.00, 380.00], [651.00, 78.00], [338.00, 111.00], [505.00, 144.00], [92.00, 301.00], [198.00, 305.00], [661.00, 132.00], [349.00, 156.00], [541.00, 179.00], [106.00, 336.00], [203.00, 348.00], [305.00, 159.00], [665.00, 160.00], [563.00, 192.00], [80.00, 343.00], [181.00, 385.00], [614.00, 205.00], [291.00, 220.00], [432.00, 320.00], [152.00, 372.00], [43.00, 380.00], [0.00, 386.00], [623.00, 281.00], [306.00, 290.00], [92.00, 357.00], [509.00, 434.00], [304.00, 357.00], [622.00, 368.00], [47.00, 394.00], [0.00, 395.00], [142.00, 405.00], [535.00, 565.00], [655.00, 200.00], [337.00, 217.00], [467.00, 322.00], [191.00, 372.00], [83.00, 375.00], [344.00, 282.00], [655.00, 282.00], [103.00, 343.00], [237.00, 368.00], [22.00, 377.00], [0.00, 379.00], [460.00, 459.00], [305.00, 352.00], [638.00, 355.00], [0.00, 401.00], [110.00, 412.00], [411.00, 570.00], [608.00, 0.00], [608.00, 40.00], [297.00, 75.00], [469.00, 84.00], [0.00, 261.00], [58.00, 263.00], [165.00, 275.00], [625.00, 0.00], [625.00, 39.00], [309.00, 74.00], [486.00, 83.00], [71.00, 264.00], [180.00, 276.00], [599.00, 0.00], [599.00, 44.00], [284.00, 80.00], [440.00, 93.00], [48.00, 271.00], [0.00, 272.00], [157.00, 277.00], [634.00, 0.00], [633.00, 41.00], [319.00, 77.00], [79.00, 269.00], [190.00, 277.00]]; // const sampleSubsetElementSource = [1.00,6.00,12.00,18.00,24.00,28.00,33.00,39.00,43.00,49.00,54.00,59.00,65.00,72.00,77.00,84.00,90.00,97.00,32.98,18.00],[5.00,11.00,17.00,23.00,27.00,32.00,37.00,42.00,46.00,-1.00,-1.00,62.00,67.00,-1.00,82.00,88.00,95.00,100.00,25.45,15.00],[4.00,10.00,16.00,22.00,26.00,31.00,36.00,41.00,47.00,51.00,57.00,63.00,66.00,74.00,81.00,87.00,93.00,99.00,26.97,18.00],[3.00,8.00,14.00,19.00,25.00,30.00,35.00,40.00,45.00,52.00,58.00,61.00,70.00,75.00,79.00,86.00,92.00,-1.00,30.45,17.00],[2.00,7.00,13.00,20.00,-1.00,29.00,34.00,38.00,44.00,50.00,53.00,60.00,64.00,71.00,78.00,85.00,91.00,98.00,27.89,17.00],[0.00,-1.00,-1.00,-1.00,-1.00,-1.00,-1.00,-1.00,-1.00,-1.00,-1.00,-1.00,-1.00,-1.00,76.00,83.00,-1.00,96.00,3.33,4.00]; function makePoseFromCandidateAndSubsetElement(candidate, subsetElement) { var pose = []; for (let j = 0 ; j < 18; j++) { let i = subsetElement[j]; pose.push(i < 0 || candidate[i] == null ? null : candidate[i].map((x)=>x)); } return pose; } function makePoseDataFromCandidateAndSubset(candidate, subset) { return subset.map(subsetElement => makePoseFromCandidateAndSubsetElement(candidate, subsetElement)); } function addPerson() { var dx = Math.random() * 100; var dy = Math.random() * 100; poseData.push( makePoseFromCandidateAndSubsetElement( sampleCandidateSource.map(point => [point[0] + dx, point[1] + dy]), sampleSubsetElementSource)); addHistory(); Redraw(); } function removePerson(personIndex) { poseData.splice(personIndex, 1); addHistory(); Redraw(); } function repairPerson(personIndex) { poseData[personIndex] = repairPose(poseData[personIndex]); addHistory(); Redraw(); } function cutOffPersonLimb(personIndex, limbIndex) { poseData[personIndex] = cutOffLimb(poseData[personIndex], limbIndex); console.log(poseData[personIndex]); console.log(poseData); addHistory(); Redraw(); } // ドラッグ中の各キーが押されているかどうかのフラグ var keyDownFlags = {}; // マウスカーソル var mouseCursor = [-1, -1]; function cross(lhs, rhs) {return lhs[0] * rhs[1] - lhs[1] * rhs[0];} function dot(lhs, rhs) {return lhs[0] * rhs[0] + lhs[1] * rhs[1];} function directedAngleTo(lhs, rhs) {return Math.atan2(cross(lhs, rhs), dot(lhs, rhs));} function isMouseOnCanvas() { // mouseCursorがcanvasの範囲内にあるかどうかを判定 var rect = canvas.getBoundingClientRect(); var f = 0 <= mouseCursor[0] && mouseCursor[0] <= rect.width && 0 <= mouseCursor[1] && mouseCursor[1] <= rect.height; return f; } function clearCanvas() { var w = canvas.width; var h = canvas.height; ctx.fillStyle = 'black'; ctx.fillRect(0, 0, w, h); } function resizeCanvas(width, height) { canvas.width = width ? width : canvas.width; canvas.height = height ? height : canvas.height; Redraw(); } function calculateCenter(shape) { var center = shape.reduce(function(acc, point) { if (point === null) { acc[0] += point[0]; acc[1] += point[1]; } return acc; }, [0, 0]); center[0] /= shape.length; center[1] /= shape.length; return center; } // v2d -> v3d function rotateX(vector, angle) { var x = vector[0]; var y = vector[1]; var z = 0; // X軸に対して回転する var x1 = x; var y1 = y * Math.cos(angle) - z * Math.sin(angle); var z1 = y * Math.sin(angle) + z * Math.cos(angle); return [x1, y1, z1]; } // v2d -> v3d function rotateY(vector, angle) { var x = vector[0]; var y = vector[1]; var z = 0; // Y軸に対して回転する var x1 = x * Math.cos(angle) + z * Math.sin(angle); var y1 = y; var z1 = -x * Math.sin(angle) + z * Math.cos(angle); return [x1, y1, z1]; } // v3d -> v2d function perspectiveProjection(vector, cameraDistance) { var x = vector[0]; var y = vector[1]; var z = vector[2]; if (z === 0) { return [x, y]; } var scale = cameraDistance / (cameraDistance - z); var x1 = x * scale; var y1 = y * scale; return [x1, y1]; } // v2d -> v3d function rotateAndProject(f, p, c, angle) { var v = [p[0] - c[0], p[1] - c[1]]; var v1 = f(v, angle); var v2 = perspectiveProjection(v1, 500); return [v2[0] + c[0], v2[1] + c[1]]; } function drawBodyPose() { let stickWidth = 4; let imageSize = Math.min(canvas.width, canvas.height); stickWidth *= imageSize / 512; const colors = [[255, 0, 0], [255, 85, 0], [255, 170, 0], [255, 255, 0], [170, 255, 0], [85, 255, 0], [0, 255, 0], [0, 255, 85], [0, 255, 170], [0, 255, 255], [0, 170, 255], [0, 85, 255], [0, 0, 255], [85, 0, 255], [170, 0, 255], [255, 0, 255], [255, 0, 170], [255, 0, 85]]; ctx.globalAlpha = 0.6; // edge for (let i = 0; i < poseData.length; i++) { const pose = poseData[i]; for (let j = 0; j < 17; j++) { const p = pose[limbSeq[j][0]]; const q = pose[limbSeq[j][1]]; if (p == null || q == null) continue; const [X0, Y0] = p; const [X1, Y1] = q; let angle = Math.atan2(Y1 - Y0, X1 - X0); let magnitude = ((X0 - X1) ** 2 + (Y0 - Y1) ** 2) ** 0.5 let polygon = new Path2D(); polygon.ellipse((X0+X1)/2, (Y0+Y1)/2, magnitude / 2, stickWidth, angle, 0, 2 * Math.PI); ctx.fillStyle = `rgb(${colors[j].join(',')})`; ctx.fill(polygon); } } ctx.globalAlpha = 1.0; // node for (let i = 0; i < poseData.length; i++) { const pose = poseData[i]; ctx.font = '12px serif'; for (let j = 0; j < 18; j++) { const p = pose[j]; if (p == null) continue; const [x, y] = p; ctx.beginPath(); ctx.arc(x, y, stickWidth, 0, 2 * Math.PI); ctx.fillStyle = `rgb(${colors[j].join(',')})`; ctx.fill(); // ctx.fillStyle = 'rgb(255,255,255)' // ctx.fillText(j, x-3, y+4); } } } let lastWheeling = 0; function drawUI() { if (keyDownFlags['Space'] || keyDownFlags['BracketLeft'] || keyDownFlags['BracketRight'] || new Date().getTime() - lastWheeling < wheelDisplayTime) { ctx.beginPath(); ctx.lineWidth=4; ctx.arc(mouseCursor[0], mouseCursor[1], dragRange, 0, 2 * Math.PI); ctx.strokeStyle = 'rgb(255,255,255)'; ctx.stroke(); } if (isDragging && (dragMode == "rotate" || dragMode == "rotate2")) { ctx.beginPath(); ctx.lineWidth=1; ctx.strokeStyle = 'rgb(255,255,255)'; ctx.moveTo(dragStart[0], dragStart[1]); ctx.lineTo(dragStart[0]+rotateBaseVector[0], dragStart[1]+rotateBaseVector[1]); ctx.stroke(); } let operationTextFlags = { "Space": "Range Move", "AltLeft": "Body Move", "AltRight": "Body Move", "ControlLeft": "Scale", "ControlRight": "Scale", "ShiftLeft": "Rotate", "ShiftRight": "Rotate", "KeyQ": "CutOff", "KeyD": "Delete", "KeyX": "X-Axis", "KeyC": "Y-Axis", "KeyR": "Repair", } // operationTextFlagsに含まれるものがkeyDownFlagsに含まれるばあい、そのキーの文字列を取得 let activeOperations = Object.keys(operationTextFlags).filter(key => keyDownFlags[key]); if (activeOperations.length > 0) { // 左上に表示 ctx.font = '20px serif'; ctx.fillStyle = 'rgb(255,255,255)'; ctx.fillText(operationTextFlags[activeOperations[0]], 10, 30); } } function Redraw() { clearCanvas(); drawBodyPose(); drawUI(); } function getNearestNode(p) { let minDistSq = Infinity; let personIndex = -1; let nodeIndex = -1; for (let i = 0; i < poseData.length; i++) { const pose = poseData[i]; for (let j = 0; j < pose.length; j++) { const q = pose[j]; if (q == null) continue; const d = distSq(p, q); if (d < minDistSq) { minDistSq = d; personIndex = i; nodeIndex = j; } } } return [personIndex, nodeIndex, Math.sqrt(minDistSq)]; } let dragRange = 64; let dragRangeDelta = 16; // ドラッグ中に座標を保持するための変数 let isDragging = false; let dragStart = [0, 0]; let dragPersonIndex = -1; let dragMarks = []; let dragMode = ""; let rotateBaseVector = null; let history = []; let historyIndex = 0; function clearHistory() { history = []; historyIndex = 0; } function addHistory() { history = history.slice(0, historyIndex); history.push(JSON.parse(JSON.stringify(poseData))); historyIndex = history.length; } function undo() { if (1 < historyIndex) { historyIndex--; poseData = deepCopy(history[historyIndex-1]); Redraw(); } } function redo() { if (historyIndex < history.length) { historyIndex++; poseData = deepCopy(history[historyIndex-1]); Redraw(); } } function fetchLatestPoseData() { return history[historyIndex-1]; } function getCanvasPosition(event) { const rect = canvas.getBoundingClientRect(); const x = event.clientX - rect.left; const y = event.clientY - rect.top; return [x, y]; } function forEachMarkedNodes(fn) { for (let i = 0; i < dragMarks.length; i++) { for (let j = 0; j < dragMarks[i].length; j++) { if (dragMarks[i][j]) { fn(i, j, poseData[i][j]); } } } } // Canvas要素上でマウスが押された場合に呼び出される関数 function handleMouseDown(event) { const p = getCanvasPosition(event); const [personIndex, nodeIndex, minDist] = getNearestNode(p); if (keyDownFlags["KeyD"]) {removePerson(personIndex);return;} if (keyDownFlags["KeyR"]) {repairPerson(personIndex);return;} if (keyDownFlags["KeyQ"] && minDist < 16) { console.log("pressed KeyQ"); cutOffPersonLimb(personIndex, nodeIndex); return; } // ドラッグ処理の開始 dragStart = p; dragMarks = poseData.map(pose => pose.map(node => false)); if (event.altKey || event.ctrlKey || event.shiftKey || keyDownFlags["KeyX"] || keyDownFlags["KeyC"]) { // dragMarksを設定 dragMarks[personIndex] = poseData[personIndex].map((node) => node != null); isDragging = true; if (event.altKey) { dragMode = "move"; } else if (event.ctrlKey) { dragMode = "scale"; } else if (event.shiftKey) { dragMode = "rotate"; rotateBaseVector = [0, 0]; } else if (keyDownFlags["KeyX"]) { dragMode = "rotateX"; } else if (keyDownFlags["KeyC"]) { dragMode = "rotateY"; } } else if (keyDownFlags["Space"]) { dragMarks[personIndex] = poseData[personIndex].map( (node) => node != null && distSq(p, node) < dragRange ** 2); isDragging = dragMarks[personIndex].some((mark) => mark); dragMode = "move"; } else if (minDist < 16) { dragMarks[personIndex][nodeIndex] = true; isDragging = true; dragMode = "move"; } } // Canvas要素上でマウスが動いた場合に呼び出される関数 function handleMouseMove(event) { mouseCursor = getCanvasPosition(event); if (isDragging) { const p = getCanvasPosition(event); const dragOffset = [p[0] - dragStart[0], p[1] - dragStart[1]]; const latestPoseData = fetchLatestPoseData(); if (dragMode == "scale") { // 拡大縮小 let xScale = 1 + dragOffset[0] / canvas.width; let yScale = 1 + dragOffset[0] / canvas.height; forEachMarkedNodes((i, j, node) => { const lp = latestPoseData[i][j]; node[0] = (lp[0] - dragStart[0]) * xScale + dragStart[0]; node[1] = (lp[1] - dragStart[1]) * yScale + dragStart[1]; }); } else if (dragMode == "rotate") { rotateBaseVector = dragOffset; if (!event.shiftKey) { dragMode = "rotate2"; } } else if (dragMode == "rotate2") { // 回転 let angle = directedAngleTo(rotateBaseVector, dragOffset); forEachMarkedNodes((i, j, node) => { const lp = latestPoseData[i][j]; let x = lp[0] - dragStart[0]; let y = lp[1] - dragStart[1]; let sin = Math.sin(angle); let cos = Math.cos(angle); node[0] = x * cos - y * sin + dragStart[0]; node[1] = x * sin + y * cos + dragStart[1]; }); } else if (dragMode == "rotateX") { const center = dragStart; const angle = dragOffset[1] / -40; forEachMarkedNodes((i, j, node) => { const lp = latestPoseData[i][j]; const np = rotateAndProject(rotateX, lp, center, angle); node[0] = np[0]; node[1] = np[1]; }); } else if (dragMode == "rotateY") { const center = dragStart; const angle = dragOffset[0] / 40; forEachMarkedNodes((i, j, node) => { const lp = latestPoseData[i][j]; const np = rotateAndProject(rotateY, lp, center, angle); node[0] = np[0]; node[1] = np[1]; }); } else if (dragMode == "move") { // 移動 forEachMarkedNodes((i, j, node) => { const lp = latestPoseData[i][j]; node[0] = lp[0] + dragOffset[0]; node[1] = lp[1] + dragOffset[1]; }); } } Redraw(); } function handleMouseUp(event) { isDragging = false; addHistory(); Redraw(); } function handleMouseLeave(event) { mouseCursor = [-1,-1]; } function ModifyDragRange(delta) { dragRange = Math.max(dragRangeDelta, Math.min(512, dragRange + delta)); } document.addEventListener('wheel', function(event) { if (!isMouseOnCanvas()) {return;} if (!event.altKey && !keyDownFlags['Space']) {return;} event.preventDefault(); const deltaY = event.deltaY; if (deltaY < 0) {ModifyDragRange(-dragRangeDelta);} if (0 < deltaY) {ModifyDragRange(dragRangeDelta);} lastWheeling = new Date().getTime(); Redraw(); window.setTimeout(function() { Redraw(); }, wheelDisplayTime+10); }, {passive: false}); document.addEventListener("keydown", (event) => { if (!isMouseOnCanvas()) {return;} if (event.code == "BracketLeft") { ModifyDragRange(-dragRangeDelta); } if (event.code == "BracketRight") { ModifyDragRange(dragRangeDelta); } keyDownFlags[event.code] = true; Redraw(); event.preventDefault(); }); document.addEventListener("keyup", (event) => { if (!isMouseOnCanvas()) {return;} keyDownFlags[event.code] = false; if (event.ctrlKey && event.code == "KeyE") { addPerson(); } else if (event.ctrlKey && event.code == "KeyZ") { if (event.shiftKey) { redo(); } else { undo(); } } Redraw(); event.preventDefault(); }); function initializeEditor() { console.log("initializeEditor"); canvas = document.getElementById('canvas'); ctx = canvas.getContext('2d'); canvas.addEventListener('mousedown', handleMouseDown); canvas.addEventListener('mousemove', handleMouseMove); canvas.addEventListener('mouseup', handleMouseUp); canvas.addEventListener('mouseleave', handleMouseLeave); poseData = []; clearHistory(); } function importPose(jsonData) { if (jsonData != null) { newPoseData = makePoseDataFromCandidateAndSubset(jsonData.candidate, jsonData.subset); } else { newPoseData = makePoseDataFromCandidateAndSubset(sampleCandidateSource, [sampleSubsetElementSource]); } poseData = poseData.concat(newPoseData); addHistory(); Redraw(); } /* function savePose() { const canvasUrl = canvas.toDataURL(); const createEl = document.createElement('a'); createEl.href = canvasUrl; // This is the name of our downloaded file createEl.download = "pose.png"; createEl.click(); createEl.remove(); var [candidate, subset] = poseDataToCandidateAndSubset(poseData); return {candidate: candidate, subset: subset}; } */ // crc32 // CRC32を初期化 function initCrc32Table() { const crcTable = new Uint32Array(256); for (let i = 0; i < 256; i++) { let c = i; for (let j = 0; j < 8; j++) { c = (c & 1) ? (0xEDB88320 ^ (c >>> 1)) : (c >>> 1); } crcTable[i] = c; } return crcTable; } // データのCRC32を計算 function getCrc32(data, crc=0) { const crcTable = initCrc32Table(); crc = (crc ^ 0xFFFFFFFF) >>> 0; for (let i = 0; i < data.length; i++) { crc = crcTable[(crc ^ data[i]) & 0xFF] ^ (crc >>> 8); } return (crc ^ 0xFFFFFFFF) >>> 0; } function stringToUint8Array(str) { var arr = new Uint8Array(str.length); for (var i = 0; i < str.length; i++) { arr[i] = str.charCodeAt(i); } return arr; } function base64ToUint8Array(base64Str) { return stringToUint8Array(atob(base64Str)); } function visitPng(png, type) { var dataLength; var chunkType; var nextChunkPos; var Signature = String.fromCharCode(137, 80, 78, 71, 13, 10, 26, 10); var rpos = 0; // シグネチャの確認 if (String.fromCharCode.apply(null, png.subarray(rpos, rpos += 8)) !== Signature) { throw new Error('invalid signature'); } // チャンクの探索 while (rpos < png.length) { dataLength = ( (png[rpos++] << 24) | (png[rpos++] << 16) | (png[rpos++] << 8) | (png[rpos++] ) ) >>> 0; nextChunkPos = rpos + dataLength + 8; chunkType = String.fromCharCode.apply(null, png.subarray(rpos, rpos += 4)); if (chunkType === type) { return [rpos - 8, dataLength, nextChunkPos]; } rpos = nextChunkPos; } } function createChunk(type, data) { var dataLength = data.length; var chunk = new Uint8Array(4 + 4 + dataLength + 4); var type = stringToUint8Array(type); var pos = 0; // length chunk[pos++] = (dataLength >> 24) & 0xff; chunk[pos++] = (dataLength >> 16) & 0xff; chunk[pos++] = (dataLength >> 8) & 0xff; chunk[pos++] = (dataLength ) & 0xff; // type chunk[pos++] = type[0]; chunk[pos++] = type[1]; chunk[pos++] = type[2]; chunk[pos++] = type[3]; // data for (let i = 0; i < dataLength; ++i) { chunk[pos++] = data[i]; } //crc initCrc32Table(); let crc = getCrc32(type); crc = getCrc32(data, crc); chunk[pos++] = (crc >> 24) & 0xff; chunk[pos++] = (crc >> 16) & 0xff; chunk[pos++] = (crc >> 8) & 0xff; chunk[pos++] = (crc ) & 0xff; return chunk; } function insertChunk(destBuffer, sourceBuffer, rpos, chunk) { var pos = 0; // IDAT チャンクの前までコピー destBuffer.set(sourceBuffer.subarray(0, rpos), pos); pos += rpos; // hoGe チャンクをコピー destBuffer.set(chunk, pos); pos += chunk.length; // IDAT チャンク以降をコピー destBuffer.set(sourceBuffer.subarray(rpos), pos); } function mergeCanvasWithPose(keyword, content) { const canvasUrl = canvas.toDataURL(); var insertion = stringToUint8Array(`${keyword}\0${content}`); var chunk = createChunk("tEXt", insertion); var sourceBuffer = base64ToUint8Array(canvasUrl.split(',')[1]); var destBuffer = new Uint8Array(sourceBuffer.length + insertion.length + 12); var [rpos, dataLength, nextChunkPos] = visitPng(sourceBuffer, "IHDR"); insertChunk(destBuffer, sourceBuffer, nextChunkPos, chunk); var blob = new Blob([destBuffer], {type: "image/png"}); var url = URL.createObjectURL(blob); return url; } function savePose() { var [candidate, subset] = poseDataToCandidateAndSubset(poseData); let jsonData = {candidate: candidate, subset: subset}; var url = mergeCanvasWithPose("openpose", JSON.stringify(jsonData)); const createEl = document.createElement('a'); createEl.href = url; // This is the name of our downloaded file createEl.download = "pose.png"; createEl.click(); createEl.remove(); return jsonData; }