276 lines
8.1 KiB
JavaScript
276 lines
8.1 KiB
JavaScript
function Surface (ronin) {
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this.el = document.createElement('canvas')
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this.el.id = 'surface'
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this._guide = document.createElement('canvas')
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this._guide.id = 'guide'
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this.ratio = window.devicePixelRatio
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// Contexts
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this.context = this.el.getContext('2d')
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this.guide = this._guide.getContext('2d')
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this.install = function (host) {
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host.appendChild(this.el)
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host.appendChild(this._guide)
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window.addEventListener('resize', (e) => { this.onResize() }, false)
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this._guide.addEventListener('mousedown', ronin.onMouseDown, false)
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this._guide.addEventListener('mousemove', ronin.onMouseMove, false)
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this._guide.addEventListener('mouseup', ronin.onMouseUp, false)
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}
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this.start = function () {
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this.maximize()
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}
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// Shape
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this.stroke = (shape, width, color, context = this.context) => {
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context.beginPath()
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this.trace(shape, context)
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context.lineWidth = width
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context.strokeStyle = color
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if (isText(shape)) {
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context.font = `${shape.p}px ${shape.f}`
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context.strokeText(shape.t, shape.x, shape.y)
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} else if (isSvg(shape)) {
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context.lineWidth = width
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context.strokeStyle = color
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context.save()
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context.translate(shape.x, shape.y)
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context.stroke(new Path2D(shape.d))
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context.restore()
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} else {
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context.stroke()
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}
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context.closePath()
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}
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// Fill
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this.fill = (shape, color, context = this.context) => {
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context.beginPath()
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context.fillStyle = color
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this.trace(shape, context)
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if (isText(shape)) {
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context.font = `${shape.p}px ${shape.f}`
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context.fillText(shape.t, shape.x, shape.y)
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} else if (isSvg(shape)) {
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context.fillStyle = color
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context.save()
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context.translate(shape.x, shape.y)
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context.fill(new Path2D(shape.d))
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context.restore()
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} else {
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context.fill()
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}
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context.closePath()
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}
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this.linearGradient = function (x1, y1, x2, y2, colors, context = this.context) {
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const gradient = context.createLinearGradient(x1, y1, x2, y2)
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const step = 1 / (colors.length - 1)
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colors.forEach((color, i) => {
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gradient.addColorStop(i * step, color)
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})
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return gradient
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}
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// Tracers
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this.trace = function (shape, context) {
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if (isRect(shape)) {
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this.traceRect(shape, context)
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}
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if (isLine(shape)) {
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this.traceLine(shape, context)
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}
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if (isCircle(shape)) {
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this.traceCircle(shape, context)
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} else if (isText(shape)) {
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this.traceText(shape, context)
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} else if (isSvg(shape)) {
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this.traceSVG(shape, context)
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}
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}
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this.traceRect = function (rect, context) {
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context.moveTo(rect.x, rect.y)
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context.lineTo(rect.x + rect.w, rect.y)
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context.lineTo(rect.x + rect.w, rect.y + rect.h)
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context.lineTo(rect.x, rect.y + rect.h)
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context.lineTo(rect.x, rect.y)
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}
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this.traceLine = function (line, context) {
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context.moveTo(line.a.x, line.a.y)
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context.lineTo(line.b.x, line.b.y)
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}
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this.traceCircle = function (circle, context) {
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context.arc(circle.cx, circle.cy, circle.r, 0, 2 * Math.PI)
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}
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this.traceText = function (text, context) {
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}
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this.traceSVG = function (text, context) {
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}
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// IO
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this.open = function (path) {
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return new Promise(resolve => {
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const img = new Image()
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img.src = path
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img.onload = () => {
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ronin.log(`Open ${img.width}x${img.height}`)
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const rect = { x: 0, y: 0, w: img.width, h: img.height }
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this.resize(rect, true)
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this.context.drawImage(img, 0, 0, img.width, img.height)
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resolve()
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}
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})
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}
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this.draw = function (img, shape = this.getFrame()) {
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return new Promise(resolve => {
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img.onload = () => {
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ronin.log(`Draw ${img.width}x${img.height}`)
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if (isLine(shape)) {
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this.context.drawImage(img, shape.a.x, shape.a.y, shape.b.x - shape.a.x, shape.b.y - shape.a.y)
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} else if (isRect(shape)) {
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this.context.drawImage(img, shape.x, shape.y, shape.w, img.height * (shape.w / img.width))
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} else {
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this.context.drawImage(img, shape.x, shape.y, img.width, img.height)
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}
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resolve()
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}
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})
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}
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this.crop = function (rect) {
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ronin.log(`Crop ${rect.w}x${rect.h} from ${rect.x}x${rect.y}`)
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const crop = this.getCrop(rect)
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this.resize(rect, true)
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this.context.drawImage(crop, 0, 0)
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}
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this.clear = function (rect = this.getFrame(), context = this.context) {
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context.clearRect(rect.x, rect.y, rect.w, rect.h)
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}
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this.clearGuide = function (rect = this.getFrame(), context = this.guide) {
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context.clearRect(rect.x, rect.y, rect.w, rect.h)
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}
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this.drawGuide = function (shape, context = this.guide) {
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this.clearGuide()
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this.stroke(shape.rect, 3, 'black', context)
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this.stroke(shape.line, 3, 'black', context)
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this.stroke(shape.circle, 3, 'black', context)
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this.stroke(shape.rect, 1.5, 'white', context)
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this.stroke(shape.line, 1.5, 'white', context)
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this.stroke(shape.circle, 1.5, 'white', context)
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}
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this.clone = function (a, b) {
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this.context.drawImage(this.el, a.x, a.y, a.w, a.h, b.x, b.y, b.w, b.h)
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}
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this.resize = function (size, fit = false) {
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const frame = this.getFrame()
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if (frame.w === size.w && frame.h === size.h) { return }
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console.log('Surface', `Resize: ${size.w}x${size.h}`)
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this.el.width = size.w
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this.el.height = size.h
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this.el.style.width = (size.w / this.ratio) + 'px'
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this.el.style.height = (size.h / this.ratio) + 'px'
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this._guide.width = size.w
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this._guide.height = size.h
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this._guide.style.width = (size.w / this.ratio) + 'px'
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this._guide.style.height = (size.h / this.ratio) + 'px'
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if (fit === true) {
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this.fitWindow(size)
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}
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}
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this.getFrame = function () {
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return { x: 0, y: 0, w: this.el.width, h: this.el.height, t: 'rect', c: this.el.width / 2, m: this.el.height / 2 }
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}
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this.fitWindow = function (size) {
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const win = require('electron').remote.getCurrentWindow()
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const pad = { w: ronin.commander.isVisible === true ? 400 : 60, h: 60 }
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if (size.w < 10 || size.h < 10) { return }
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win.setSize(Math.floor((size.w / this.ratio) + pad.w), Math.floor((size.h / this.ratio) + pad.h), true)
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}
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this.maximize = function () {
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this.resize({ x: 0, y: 0, w: ((window.innerWidth - 60) * this.ratio), h: ((window.innerHeight - 60) * this.ratio), t: 'rect' })
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}
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this.onResize = function () {
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if (ronin.commander._input.value === '') {
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this.maximize()
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}
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const f = this.getFrame()
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ronin.log(`resize ${f.w}x${f.h}`)
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}
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this.getCrop = function (rect) {
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const newCanvas = document.createElement('canvas')
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newCanvas.width = rect.w
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newCanvas.height = rect.h
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newCanvas.getContext('2d').drawImage(this.el, rect.x, rect.y, rect.w, rect.h, 0, 0, rect.w, rect.h)
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return newCanvas
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}
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this.resizeImage = function (src, dst, type = 'image/png', quality = 1.0) {
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return new Promise(resolve => {
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const tmp = new Image()
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let canvas
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let context
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let cW = src.naturalWidth
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let cH = src.naturalHeight
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tmp.src = src.src
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// resolve()
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tmp.onload = () => {
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canvas = document.createElement('canvas')
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cW /= 2
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cH /= 2
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if (cW < src.width) {
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cW = src.width
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}
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if (cH < src.height) {
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cH = src.height
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}
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canvas.width = cW
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canvas.height = cH
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context = canvas.getContext('2d')
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context.drawImage(tmp, 0, 0, cW, cH)
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dst.src = canvas.toDataURL(type, quality)
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if (cW <= src.width || cH <= src.height) { return resolve() }
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tmp.src = dst.src
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return resolve()
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}
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})
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}
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function isRect (shape) {
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return !isNaN(shape.x) && !isNaN(shape.y) && !isNaN(shape.w) && !isNaN(shape.h)
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}
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function isCircle (shape) {
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return !isNaN(shape.cx) && !isNaN(shape.cy) && !isNaN(shape.r)
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}
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function isSvg (shape) {
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return shape.d
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}
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function isText (shape) {
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return !isNaN(shape.x) && !isNaN(shape.y) && !isNaN(shape.p) && shape.t && shape.f
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}
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function isLine (shape) {
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return shape.a && !isNaN(shape.a.x) && !isNaN(shape.a.y) && shape.b && !isNaN(shape.b.x) && !isNaN(shape.b.y)
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}
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}
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