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Diffstat (limited to 'usr/local/www/protochart/excanvas.js')
-rw-r--r-- | usr/local/www/protochart/excanvas.js | 785 |
1 files changed, 0 insertions, 785 deletions
diff --git a/usr/local/www/protochart/excanvas.js b/usr/local/www/protochart/excanvas.js deleted file mode 100644 index f8780b6..0000000 --- a/usr/local/www/protochart/excanvas.js +++ /dev/null @@ -1,785 +0,0 @@ -// Copyright 2006 Google Inc. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - - -// Known Issues: -// -// * Patterns are not implemented. -// * Radial gradient are not implemented. The VML version of these look very -// different from the canvas one. -// * Clipping paths are not implemented. -// * Coordsize. The width and height attribute have higher priority than the -// width and height style values which isn't correct. -// * Painting mode isn't implemented. -// * Canvas width/height should is using content-box by default. IE in -// Quirks mode will draw the canvas using border-box. Either change your -// doctype to HTML5 -// (http://www.whatwg.org/specs/web-apps/current-work/#the-doctype) -// or use Box Sizing Behavior from WebFX -// (http://webfx.eae.net/dhtml/boxsizing/boxsizing.html) -// * Optimize. There is always room for speed improvements. - -// only add this code if we do not already have a canvas implementation -if (!window.CanvasRenderingContext2D) { - -(function () { - - // alias some functions to make (compiled) code shorter - var m = Math; - var mr = m.round; - var ms = m.sin; - var mc = m.cos; - - // this is used for sub pixel precision - var Z = 10; - var Z2 = Z / 2; - - var G_vmlCanvasManager_ = { - init: function (opt_doc) { - var doc = opt_doc || document; - if (/MSIE/.test(navigator.userAgent) && !window.opera) { - var self = this; - doc.attachEvent("onreadystatechange", function () { - self.init_(doc); - }); - } - }, - - init_: function (doc) { - if (doc.readyState == "complete") { - // create xmlns - if (!doc.namespaces["g_vml_"]) { - doc.namespaces.add("g_vml_", "urn:schemas-microsoft-com:vml"); - } - - // setup default css - var ss = doc.createStyleSheet(); - ss.cssText = "canvas{display:inline-block;overflow:hidden;" + - // default size is 300x150 in Gecko and Opera - "text-align:left;width:300px;height:150px}" + - "g_vml_\\:*{behavior:url(#default#VML)}"; - - // find all canvas elements - var els = doc.getElementsByTagName("canvas"); - for (var i = 0; i < els.length; i++) { - if (!els[i].getContext) { - this.initElement(els[i]); - } - } - } - }, - - fixElement_: function (el) { - // in IE before version 5.5 we would need to add HTML: to the tag name - // but we do not care about IE before version 6 - var outerHTML = el.outerHTML; - - var newEl = el.ownerDocument.createElement(outerHTML); - // if the tag is still open IE has created the children as siblings and - // it has also created a tag with the name "/FOO" - if (outerHTML.slice(-2) != "/>") { - var tagName = "/" + el.tagName; - var ns; - // remove content - while ((ns = el.nextSibling) && ns.tagName != tagName) { - ns.removeNode(); - } - // remove the incorrect closing tag - if (ns) { - ns.removeNode(); - } - } - el.parentNode.replaceChild(newEl, el); - return newEl; - }, - - /** - * Public initializes a canvas element so that it can be used as canvas - * element from now on. This is called automatically before the page is - * loaded but if you are creating elements using createElement you need to - * make sure this is called on the element. - * @param {HTMLElement} el The canvas element to initialize. - * @return {HTMLElement} the element that was created. - */ - initElement: function (el) { - el = this.fixElement_(el); - el.getContext = function () { - if (this.context_) { - return this.context_; - } - return this.context_ = new CanvasRenderingContext2D_(this); - }; - - // do not use inline function because that will leak memory - el.attachEvent('onpropertychange', onPropertyChange); - el.attachEvent('onresize', onResize); - - var attrs = el.attributes; - if (attrs.width && attrs.width.specified) { - // TODO: use runtimeStyle and coordsize - // el.getContext().setWidth_(attrs.width.nodeValue); - el.style.width = attrs.width.nodeValue + "px"; - } else { - el.width = el.clientWidth; - } - if (attrs.height && attrs.height.specified) { - // TODO: use runtimeStyle and coordsize - // el.getContext().setHeight_(attrs.height.nodeValue); - el.style.height = attrs.height.nodeValue + "px"; - } else { - el.height = el.clientHeight; - } - //el.getContext().setCoordsize_() - return el; - } - }; - - function onPropertyChange(e) { - var el = e.srcElement; - - switch (e.propertyName) { - case 'width': - el.style.width = el.attributes.width.nodeValue + "px"; - el.getContext().clearRect(); - break; - case 'height': - el.style.height = el.attributes.height.nodeValue + "px"; - el.getContext().clearRect(); - break; - } - } - - function onResize(e) { - var el = e.srcElement; - if (el.firstChild) { - el.firstChild.style.width = el.clientWidth + 'px'; - el.firstChild.style.height = el.clientHeight + 'px'; - } - } - - G_vmlCanvasManager_.init(); - - // precompute "00" to "FF" - var dec2hex = []; - for (var i = 0; i < 16; i++) { - for (var j = 0; j < 16; j++) { - dec2hex[i * 16 + j] = i.toString(16) + j.toString(16); - } - } - - function createMatrixIdentity() { - return [ - [1, 0, 0], - [0, 1, 0], - [0, 0, 1] - ]; - } - - function matrixMultiply(m1, m2) { - var result = createMatrixIdentity(); - - for (var x = 0; x < 3; x++) { - for (var y = 0; y < 3; y++) { - var sum = 0; - - for (var z = 0; z < 3; z++) { - sum += m1[x][z] * m2[z][y]; - } - - result[x][y] = sum; - } - } - return result; - } - - function copyState(o1, o2) { - o2.fillStyle = o1.fillStyle; - o2.lineCap = o1.lineCap; - o2.lineJoin = o1.lineJoin; - o2.lineWidth = o1.lineWidth; - o2.miterLimit = o1.miterLimit; - o2.shadowBlur = o1.shadowBlur; - o2.shadowColor = o1.shadowColor; - o2.shadowOffsetX = o1.shadowOffsetX; - o2.shadowOffsetY = o1.shadowOffsetY; - o2.strokeStyle = o1.strokeStyle; - o2.arcScaleX_ = o1.arcScaleX_; - o2.arcScaleY_ = o1.arcScaleY_; - } - - function processStyle(styleString) { - var str, alpha = 1; - - styleString = String(styleString); - if (styleString.substring(0, 3) == "rgb") { - var start = styleString.indexOf("(", 3); - var end = styleString.indexOf(")", start + 1); - var guts = styleString.substring(start + 1, end).split(","); - - str = "#"; - for (var i = 0; i < 3; i++) { - str += dec2hex[Number(guts[i])]; - } - - if ((guts.length == 4) && (styleString.substr(3, 1) == "a")) { - alpha = guts[3]; - } - } else { - str = styleString; - } - - return [str, alpha]; - } - - function processLineCap(lineCap) { - switch (lineCap) { - case "butt": - return "flat"; - case "round": - return "round"; - case "square": - default: - return "square"; - } - } - - /** - * This class implements CanvasRenderingContext2D interface as described by - * the WHATWG. - * @param {HTMLElement} surfaceElement The element that the 2D context should - * be associated with - */ - function CanvasRenderingContext2D_(surfaceElement) { - this.m_ = createMatrixIdentity(); - - this.mStack_ = []; - this.aStack_ = []; - this.currentPath_ = []; - - // Canvas context properties - this.strokeStyle = "#000"; - this.fillStyle = "#000"; - - this.lineWidth = 1; - this.lineJoin = "miter"; - this.lineCap = "butt"; - this.miterLimit = Z * 1; - this.globalAlpha = 1; - this.canvas = surfaceElement; - - var el = surfaceElement.ownerDocument.createElement('div'); - el.style.width = surfaceElement.clientWidth + 'px'; - el.style.height = surfaceElement.clientHeight + 'px'; - el.style.overflow = 'hidden'; - el.style.position = 'absolute'; - surfaceElement.appendChild(el); - - this.element_ = el; - this.arcScaleX_ = 1; - this.arcScaleY_ = 1; - } - - var contextPrototype = CanvasRenderingContext2D_.prototype; - contextPrototype.clearRect = function() { - this.element_.innerHTML = ""; - this.currentPath_ = []; - }; - - contextPrototype.beginPath = function() { - // TODO: Branch current matrix so that save/restore has no effect - // as per safari docs. - - this.currentPath_ = []; - }; - - contextPrototype.moveTo = function(aX, aY) { - this.currentPath_.push({type: "moveTo", x: aX, y: aY}); - this.currentX_ = aX; - this.currentY_ = aY; - }; - - contextPrototype.lineTo = function(aX, aY) { - this.currentPath_.push({type: "lineTo", x: aX, y: aY}); - this.currentX_ = aX; - this.currentY_ = aY; - }; - - contextPrototype.bezierCurveTo = function(aCP1x, aCP1y, - aCP2x, aCP2y, - aX, aY) { - this.currentPath_.push({type: "bezierCurveTo", - cp1x: aCP1x, - cp1y: aCP1y, - cp2x: aCP2x, - cp2y: aCP2y, - x: aX, - y: aY}); - this.currentX_ = aX; - this.currentY_ = aY; - }; - - contextPrototype.quadraticCurveTo = function(aCPx, aCPy, aX, aY) { - // the following is lifted almost directly from - // http://developer.mozilla.org/en/docs/Canvas_tutorial:Drawing_shapes - var cp1x = this.currentX_ + 2.0 / 3.0 * (aCPx - this.currentX_); - var cp1y = this.currentY_ + 2.0 / 3.0 * (aCPy - this.currentY_); - var cp2x = cp1x + (aX - this.currentX_) / 3.0; - var cp2y = cp1y + (aY - this.currentY_) / 3.0; - this.bezierCurveTo(cp1x, cp1y, cp2x, cp2y, aX, aY); - }; - - contextPrototype.arc = function(aX, aY, aRadius, - aStartAngle, aEndAngle, aClockwise) { - aRadius *= Z; - var arcType = aClockwise ? "at" : "wa"; - - var xStart = aX + (mc(aStartAngle) * aRadius) - Z2; - var yStart = aY + (ms(aStartAngle) * aRadius) - Z2; - - var xEnd = aX + (mc(aEndAngle) * aRadius) - Z2; - var yEnd = aY + (ms(aEndAngle) * aRadius) - Z2; - - // IE won't render arches drawn counter clockwise if xStart == xEnd. - if (xStart == xEnd && !aClockwise) { - xStart += 0.125; // Offset xStart by 1/80 of a pixel. Use something - // that can be represented in binary - } - - this.currentPath_.push({type: arcType, - x: aX, - y: aY, - radius: aRadius, - xStart: xStart, - yStart: yStart, - xEnd: xEnd, - yEnd: yEnd}); - - }; - - contextPrototype.rect = function(aX, aY, aWidth, aHeight) { - this.moveTo(aX, aY); - this.lineTo(aX + aWidth, aY); - this.lineTo(aX + aWidth, aY + aHeight); - this.lineTo(aX, aY + aHeight); - this.closePath(); - }; - - contextPrototype.strokeRect = function(aX, aY, aWidth, aHeight) { - // Will destroy any existing path (same as FF behaviour) - this.beginPath(); - this.moveTo(aX, aY); - this.lineTo(aX + aWidth, aY); - this.lineTo(aX + aWidth, aY + aHeight); - this.lineTo(aX, aY + aHeight); - this.closePath(); - this.stroke(); - }; - - contextPrototype.fillRect = function(aX, aY, aWidth, aHeight) { - // Will destroy any existing path (same as FF behaviour) - this.beginPath(); - this.moveTo(aX, aY); - this.lineTo(aX + aWidth, aY); - this.lineTo(aX + aWidth, aY + aHeight); - this.lineTo(aX, aY + aHeight); - this.closePath(); - this.fill(); - }; - - contextPrototype.createLinearGradient = function(aX0, aY0, aX1, aY1) { - var gradient = new CanvasGradient_("gradient"); - return gradient; - }; - - contextPrototype.createRadialGradient = function(aX0, aY0, - aR0, aX1, - aY1, aR1) { - var gradient = new CanvasGradient_("gradientradial"); - gradient.radius1_ = aR0; - gradient.radius2_ = aR1; - gradient.focus_.x = aX0; - gradient.focus_.y = aY0; - return gradient; - }; - - contextPrototype.drawImage = function (image, var_args) { - var dx, dy, dw, dh, sx, sy, sw, sh; - - // to find the original width we overide the width and height - var oldRuntimeWidth = image.runtimeStyle.width; - var oldRuntimeHeight = image.runtimeStyle.height; - image.runtimeStyle.width = 'auto'; - image.runtimeStyle.height = 'auto'; - - // get the original size - var w = image.width; - var h = image.height; - - // and remove overides - image.runtimeStyle.width = oldRuntimeWidth; - image.runtimeStyle.height = oldRuntimeHeight; - - if (arguments.length == 3) { - dx = arguments[1]; - dy = arguments[2]; - sx = sy = 0; - sw = dw = w; - sh = dh = h; - } else if (arguments.length == 5) { - dx = arguments[1]; - dy = arguments[2]; - dw = arguments[3]; - dh = arguments[4]; - sx = sy = 0; - sw = w; - sh = h; - } else if (arguments.length == 9) { - sx = arguments[1]; - sy = arguments[2]; - sw = arguments[3]; - sh = arguments[4]; - dx = arguments[5]; - dy = arguments[6]; - dw = arguments[7]; - dh = arguments[8]; - } else { - throw "Invalid number of arguments"; - } - - var d = this.getCoords_(dx, dy); - - var w2 = sw / 2; - var h2 = sh / 2; - - var vmlStr = []; - - var W = 10; - var H = 10; - - // For some reason that I've now forgotten, using divs didn't work - vmlStr.push(' <g_vml_:group', - ' coordsize="', Z * W, ',', Z * H, '"', - ' coordorigin="0,0"' , - ' style="width:', W, ';height:', H, ';position:absolute;'); - - // If filters are necessary (rotation exists), create them - // filters are bog-slow, so only create them if abbsolutely necessary - // The following check doesn't account for skews (which don't exist - // in the canvas spec (yet) anyway. - - if (this.m_[0][0] != 1 || this.m_[0][1]) { - var filter = []; - - // Note the 12/21 reversal - filter.push("M11='", this.m_[0][0], "',", - "M12='", this.m_[1][0], "',", - "M21='", this.m_[0][1], "',", - "M22='", this.m_[1][1], "',", - "Dx='", mr(d.x / Z), "',", - "Dy='", mr(d.y / Z), "'"); - - // Bounding box calculation (need to minimize displayed area so that - // filters don't waste time on unused pixels. - var max = d; - var c2 = this.getCoords_(dx + dw, dy); - var c3 = this.getCoords_(dx, dy + dh); - var c4 = this.getCoords_(dx + dw, dy + dh); - - max.x = Math.max(max.x, c2.x, c3.x, c4.x); - max.y = Math.max(max.y, c2.y, c3.y, c4.y); - - vmlStr.push("padding:0 ", mr(max.x / Z), "px ", mr(max.y / Z), - "px 0;filter:progid:DXImageTransform.Microsoft.Matrix(", - filter.join(""), ", sizingmethod='clip');"); - } else { - vmlStr.push("top:", mr(d.y / Z), "px;left:", mr(d.x / Z), "px;"); - } - - vmlStr.push(' ">' , - '<g_vml_:image src="', image.src, '"', - ' style="width:', Z * dw, ';', - ' height:', Z * dh, ';"', - ' cropleft="', sx / w, '"', - ' croptop="', sy / h, '"', - ' cropright="', (w - sx - sw) / w, '"', - ' cropbottom="', (h - sy - sh) / h, '"', - ' />', - '</g_vml_:group>'); - - this.element_.insertAdjacentHTML("BeforeEnd", - vmlStr.join("")); - }; - - contextPrototype.stroke = function(aFill) { - var lineStr = []; - var lineOpen = false; - var a = processStyle(aFill ? this.fillStyle : this.strokeStyle); - var color = a[0]; - var opacity = a[1] * this.globalAlpha; - - var W = 10; - var H = 10; - - lineStr.push('<g_vml_:shape', - ' fillcolor="', color, '"', - ' filled="', Boolean(aFill), '"', - ' style="position:absolute;width:', W, ';height:', H, ';"', - ' coordorigin="0 0" coordsize="', Z * W, ' ', Z * H, '"', - ' stroked="', !aFill, '"', - ' strokeweight="', this.lineWidth, '"', - ' strokecolor="', color, '"', - ' path="'); - - var newSeq = false; - var min = {x: null, y: null}; - var max = {x: null, y: null}; - - for (var i = 0; i < this.currentPath_.length; i++) { - var p = this.currentPath_[i]; - - if (p.type == "moveTo") { - lineStr.push(" m "); - var c = this.getCoords_(p.x, p.y); - lineStr.push(mr(c.x), ",", mr(c.y)); - } else if (p.type == "lineTo") { - lineStr.push(" l "); - var c = this.getCoords_(p.x, p.y); - lineStr.push(mr(c.x), ",", mr(c.y)); - } else if (p.type == "close") { - lineStr.push(" x "); - } else if (p.type == "bezierCurveTo") { - lineStr.push(" c "); - var c = this.getCoords_(p.x, p.y); - var c1 = this.getCoords_(p.cp1x, p.cp1y); - var c2 = this.getCoords_(p.cp2x, p.cp2y); - lineStr.push(mr(c1.x), ",", mr(c1.y), ",", - mr(c2.x), ",", mr(c2.y), ",", - mr(c.x), ",", mr(c.y)); - } else if (p.type == "at" || p.type == "wa") { - lineStr.push(" ", p.type, " "); - var c = this.getCoords_(p.x, p.y); - var cStart = this.getCoords_(p.xStart, p.yStart); - var cEnd = this.getCoords_(p.xEnd, p.yEnd); - - lineStr.push(mr(c.x - this.arcScaleX_ * p.radius), ",", - mr(c.y - this.arcScaleY_ * p.radius), " ", - mr(c.x + this.arcScaleX_ * p.radius), ",", - mr(c.y + this.arcScaleY_ * p.radius), " ", - mr(cStart.x), ",", mr(cStart.y), " ", - mr(cEnd.x), ",", mr(cEnd.y)); - } - - - // TODO: Following is broken for curves due to - // move to proper paths. - - // Figure out dimensions so we can do gradient fills - // properly - if(c) { - if (min.x == null || c.x < min.x) { - min.x = c.x; - } - if (max.x == null || c.x > max.x) { - max.x = c.x; - } - if (min.y == null || c.y < min.y) { - min.y = c.y; - } - if (max.y == null || c.y > max.y) { - max.y = c.y; - } - } - } - lineStr.push(' ">'); - - if (typeof this.fillStyle == "object") { - var focus = {x: "50%", y: "50%"}; - var width = (max.x - min.x); - var height = (max.y - min.y); - var dimension = (width > height) ? width : height; - - focus.x = mr((this.fillStyle.focus_.x / width) * 100 + 50) + "%"; - focus.y = mr((this.fillStyle.focus_.y / height) * 100 + 50) + "%"; - - var colors = []; - - // inside radius (%) - if (this.fillStyle.type_ == "gradientradial") { - var inside = (this.fillStyle.radius1_ / dimension * 100); - - // percentage that outside radius exceeds inside radius - var expansion = (this.fillStyle.radius2_ / dimension * 100) - inside; - } else { - var inside = 0; - var expansion = 100; - } - - var insidecolor = {offset: null, color: null}; - var outsidecolor = {offset: null, color: null}; - - // We need to sort 'colors' by percentage, from 0 > 100 otherwise ie - // won't interpret it correctly - this.fillStyle.colors_.sort(function (cs1, cs2) { - return cs1.offset - cs2.offset; - }); - - for (var i = 0; i < this.fillStyle.colors_.length; i++) { - var fs = this.fillStyle.colors_[i]; - - colors.push( (fs.offset * expansion) + inside, "% ", fs.color, ","); - - if (fs.offset > insidecolor.offset || insidecolor.offset == null) { - insidecolor.offset = fs.offset; - insidecolor.color = fs.color; - } - - if (fs.offset < outsidecolor.offset || outsidecolor.offset == null) { - outsidecolor.offset = fs.offset; - outsidecolor.color = fs.color; - } - } - colors.pop(); - - lineStr.push('<g_vml_:fill', - ' color="', outsidecolor.color, '"', - ' color2="', insidecolor.color, '"', - ' type="', this.fillStyle.type_, '"', - ' focusposition="', focus.x, ', ', focus.y, '"', - ' colors="', colors.join(""), '"', - ' opacity="', opacity, '" />'); - } else if (aFill) { - lineStr.push('<g_vml_:fill color="', color, '" opacity="', opacity, '" />'); - } else { - lineStr.push( - '<g_vml_:stroke', - ' opacity="', opacity,'"', - ' joinstyle="', this.lineJoin, '"', - ' miterlimit="', this.miterLimit, '"', - ' endcap="', processLineCap(this.lineCap) ,'"', - ' weight="', this.lineWidth, 'px"', - ' color="', color,'" />' - ); - } - - lineStr.push("</g_vml_:shape>"); - - this.element_.insertAdjacentHTML("beforeEnd", lineStr.join("")); - - //this.currentPath_ = []; - }; - - contextPrototype.fill = function() { - this.stroke(true); - }; - - contextPrototype.closePath = function() { - this.currentPath_.push({type: "close"}); - }; - - /** - * @private - */ - contextPrototype.getCoords_ = function(aX, aY) { - return { - x: Z * (aX * this.m_[0][0] + aY * this.m_[1][0] + this.m_[2][0]) - Z2, - y: Z * (aX * this.m_[0][1] + aY * this.m_[1][1] + this.m_[2][1]) - Z2 - }; - }; - - contextPrototype.save = function() { - var o = {}; - copyState(this, o); - this.aStack_.push(o); - this.mStack_.push(this.m_); - this.m_ = matrixMultiply(createMatrixIdentity(), this.m_); - }; - - contextPrototype.restore = function() { - copyState(this.aStack_.pop(), this); - this.m_ = this.mStack_.pop(); - }; - - contextPrototype.translate = function(aX, aY) { - var m1 = [ - [1, 0, 0], - [0, 1, 0], - [aX, aY, 1] - ]; - - this.m_ = matrixMultiply(m1, this.m_); - }; - - contextPrototype.rotate = function(aRot) { - var c = mc(aRot); - var s = ms(aRot); - - var m1 = [ - [c, s, 0], - [-s, c, 0], - [0, 0, 1] - ]; - - this.m_ = matrixMultiply(m1, this.m_); - }; - - contextPrototype.scale = function(aX, aY) { - this.arcScaleX_ *= aX; - this.arcScaleY_ *= aY; - var m1 = [ - [aX, 0, 0], - [0, aY, 0], - [0, 0, 1] - ]; - - this.m_ = matrixMultiply(m1, this.m_); - }; - - /******** STUBS ********/ - contextPrototype.clip = function() { - // TODO: Implement - }; - - contextPrototype.arcTo = function() { - // TODO: Implement - }; - - contextPrototype.createPattern = function() { - return new CanvasPattern_; - }; - - // Gradient / Pattern Stubs - function CanvasGradient_(aType) { - this.type_ = aType; - this.radius1_ = 0; - this.radius2_ = 0; - this.colors_ = []; - this.focus_ = {x: 0, y: 0}; - } - - CanvasGradient_.prototype.addColorStop = function(aOffset, aColor) { - aColor = processStyle(aColor); - this.colors_.push({offset: 1-aOffset, color: aColor}); - }; - - function CanvasPattern_() {} - - // set up externs - G_vmlCanvasManager = G_vmlCanvasManager_; - CanvasRenderingContext2D = CanvasRenderingContext2D_; - CanvasGradient = CanvasGradient_; - CanvasPattern = CanvasPattern_; - -})(); - -} // if |