const { mk } = require('../utils') module.exports = function attachDebugScreen (screen) { const debugCanvas = mk('canvas') const ctx = debugCanvas.getContext('2d') debugCanvas.classList.add('debug-canvas') let mouseHoverCell = null let updateToolbar let onMouseMove = e => { mouseHoverCell = screen.screenToGrid(e.offsetX, e.offsetY) startDrawing() updateToolbar() } let onMouseOut = () => (mouseHoverCell = null) let addCanvas = function () { if (!debugCanvas.parentNode) { screen.canvas.parentNode.appendChild(debugCanvas) screen.canvas.parentNode.addEventListener('mousemove', onMouseMove) screen.canvas.parentNode.addEventListener('mouseout', onMouseOut) } } let removeCanvas = function () { if (debugCanvas.parentNode) { debugCanvas.parentNode.removeChild(debugCanvas) screen.canvas.parentNode.removeEventListener('mousemove', onMouseMove) screen.canvas.parentNode.removeEventListener('mouseout', onMouseOut) onMouseOut() } } let updateCanvasSize = function () { let { width, height, devicePixelRatio } = screen.window let cellSize = screen.getCellSize() debugCanvas.width = width * cellSize.width * devicePixelRatio debugCanvas.height = height * cellSize.height * devicePixelRatio debugCanvas.style.width = `${width * cellSize.width}px` debugCanvas.style.height = `${height * cellSize.height}px` } let drawInfo = mk('div') drawInfo.classList.add('draw-info') let startTime, endTime, lastReason let cells = new Map() let clippedRects = [] let startDrawing screen._debug = { drawStart (reason) { lastReason = reason startTime = Date.now() clippedRects = [] }, drawEnd () { endTime = Date.now() console.log(drawInfo.textContent = `Draw: ${lastReason} (${(endTime - startTime)} ms) with graphics=${screen.window.graphics}`) startDrawing() }, setCell (cell, flags) { cells.set(cell, [flags, Date.now()]) }, clipRect (...args) { clippedRects.push(args) } } let clipPattern { let patternCanvas = document.createElement('canvas') patternCanvas.width = patternCanvas.height = 12 let pctx = patternCanvas.getContext('2d') pctx.lineWidth = 1 pctx.strokeStyle = '#00f' pctx.beginPath() pctx.moveTo(0, 0) pctx.lineTo(0 - 4, 12) pctx.moveTo(4, 0) pctx.lineTo(4 - 4, 12) pctx.moveTo(8, 0) pctx.lineTo(8 - 4, 12) pctx.moveTo(12, 0) pctx.lineTo(12 - 4, 12) pctx.moveTo(16, 0) pctx.lineTo(16 - 4, 12) pctx.stroke() clipPattern = ctx.createPattern(patternCanvas, 'repeat') } let isDrawing = false let lastDrawTime = 0 let t = 0 let drawLoop = function () { if (isDrawing) window.requestAnimationFrame(drawLoop) let dt = (Date.now() - lastDrawTime) / 1000 lastDrawTime = Date.now() t += dt let { devicePixelRatio, width, height } = screen.window let { width: cellWidth, height: cellHeight } = screen.getCellSize() let screenLength = width * height let now = Date.now() ctx.setTransform(devicePixelRatio, 0, 0, devicePixelRatio, 0, 0) ctx.clearRect(0, 0, width * cellWidth, height * cellHeight) let activeCells = 0 for (let cell = 0; cell < screenLength; cell++) { if (!cells.has(cell) || cells.get(cell)[0] === 0) continue let [flags, timestamp] = cells.get(cell) let elapsedTime = (now - timestamp) / 1000 if (elapsedTime > 1) continue activeCells++ ctx.globalAlpha = 0.5 * Math.max(0, 1 - elapsedTime) let x = cell % width let y = Math.floor(cell / width) if (flags & 1) { // redrawn ctx.fillStyle = '#f0f' } if (flags & 2) { // updated ctx.fillStyle = '#0f0' } ctx.fillRect(x * cellWidth, y * cellHeight, cellWidth, cellHeight) if (flags & 4) { // wide cell ctx.lineWidth = 2 ctx.strokeStyle = '#f00' ctx.strokeRect(x * cellWidth, y * cellHeight, cellWidth, cellHeight) } } if (clippedRects.length) { ctx.globalAlpha = 0.5 ctx.beginPath() for (let rect of clippedRects) { ctx.rect(...rect) } ctx.fillStyle = clipPattern ctx.fill() } if (mouseHoverCell) { ctx.save() ctx.globalAlpha = 1 ctx.lineWidth = 1 + 0.5 * Math.sin(t * 10) ctx.strokeStyle = '#fff' ctx.lineJoin = 'round' ctx.setLineDash([2, 2]) ctx.lineDashOffset = t * 10 ctx.strokeRect(mouseHoverCell[0] * cellWidth, mouseHoverCell[1] * cellHeight, cellWidth, cellHeight) ctx.lineDashOffset += 2 ctx.strokeStyle = '#000' ctx.strokeRect(mouseHoverCell[0] * cellWidth, mouseHoverCell[1] * cellHeight, cellWidth, cellHeight) ctx.restore() } if (activeCells === 0 && !mouseHoverCell) { isDrawing = false removeCanvas() } } startDrawing = function () { if (isDrawing) return addCanvas() updateCanvasSize() isDrawing = true lastDrawTime = Date.now() drawLoop() } // debug toolbar const toolbar = mk('div') toolbar.classList.add('debug-toolbar') let toolbarAttached = false const dataDisplay = mk('div') dataDisplay.classList.add('data-display') toolbar.appendChild(dataDisplay) toolbar.appendChild(drawInfo) const buttons = mk('div') buttons.classList.add('toolbar-buttons') toolbar.appendChild(buttons) { const redraw = mk('button') redraw.textContent = 'Redraw' redraw.addEventListener('click', e => { screen.renderer.resetDrawn() screen.renderer.draw('debug-redraw') }) buttons.appendChild(redraw) const fancyGraphics = mk('button') fancyGraphics.textContent = 'Toggle Graphics' fancyGraphics.addEventListener('click', e => { screen.window.graphics = +!screen.window.graphics }) buttons.appendChild(fancyGraphics) } const attachToolbar = function () { screen.canvas.parentNode.appendChild(toolbar) } const detachToolbar = function () { toolbar.parentNode.removeChild(toolbar) } screen.on('update-window:debug', debug => { if (debug !== toolbarAttached) { toolbarAttached = debug if (debug) attachToolbar() else { detachToolbar() removeCanvas() } } }) const formatColor = color => color < 256 ? color : `#${`000000${(color - 256).toString(16)}`.substr(-6)}` const getCellData = cell => { if (cell < 0 || cell > screen.screen.length) return '(-)' let cellAttrs = screen.renderer.drawnScreenAttrs[cell] let cellFG = formatColor(screen.renderer.drawnScreenFG[cell]) let cellBG = formatColor(screen.renderer.drawnScreenBG[cell]) let cellCode = (screen.renderer.drawnScreen[cell] || '').codePointAt(0) let hexcode = cellCode.toString(16).toUpperCase() if (hexcode.length < 4) hexcode = `0000${hexcode}`.substr(-4) hexcode = `U+${hexcode}` let x = cell % screen.window.width let y = Math.floor(cell / screen.window.width) return `((${y},${x})=${cell}:${hexcode}:F${cellFG}:B${cellBG}:A${cellAttrs.toString(2)})` } let internalInfo = {} updateToolbar = () => { if (!toolbarAttached) return let text = `C((${screen.cursor.y},${screen.cursor.x}),hang:${screen.cursor.hanging},vis:${screen.cursor.visible})` if (mouseHoverCell) { text += ' m' + getCellData(mouseHoverCell[1] * screen.window.width + mouseHoverCell[0]) } if ('flags' in internalInfo) { // we got ourselves some internal data text += ' ' text += ` flags:${internalInfo.flags}` text += ` curAttrs:${internalInfo.cursorAttrs}` text += ` Region:${internalInfo.regionStart}->${internalInfo.regionEnd}` text += ` Charset:${internalInfo.charsetGx} (0:${internalInfo.charsetG0},1:${internalInfo.charsetG1})` text += ` Heap:${internalInfo.freeHeap}` text += ` Clients:${internalInfo.clientCount}` } dataDisplay.textContent = text } screen.on('draw', updateToolbar) screen.on('internal', data => { internalInfo = data updateToolbar() }) }