mirror of
https://github.com/niklasvh/html2canvas.git
synced 2023-08-10 21:13:10 +03:00
Added support for background linear gradients on mozilla and webkit
This commit is contained in:
The Brain
parent
180cd38265
commit
5ba5ef571c
@ -297,7 +297,73 @@ html2canvas.prototype.finish = function(){
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this.opts.ready(this);
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}
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/*
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* This method draws the gradient on a temporary canvas and inserts it in the images stack as a image so the rest of the code will handle it seamlessly
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*/
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html2canvas.prototype.drawGradient = function(src, bounds) {
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var canvas = document.createElement('canvas'),
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tmp, p0 = 0,p1 = 0,p2 = 0,p3 = 0,
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steps=[];
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canvas.width = bounds.width;
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canvas.height = bounds.height;
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var ctx = canvas.getContext('2d');
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function getColors(input) {
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var j = -1, color = '';
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while(j++ < input.length) {
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var chr = input.charAt(j);
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if (chr == ')') {
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color += chr;
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steps.push(color);
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color = '';
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j+=2;
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} else {
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color += chr;
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}
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}
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}
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if (tmp = src.match(/-webkit-linear-gradient\((.*)\)/)) {
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var position = tmp[1].split(",", 1)[0];
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getColors(tmp[1].substr(position.length + 2));
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position = position.split(' ');
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for (var p = 0; p < position.length; p++) {
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switch(position[p]) {
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case 'top': p3 = bounds.height; break;
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case 'right': p0 = bounds.width; break;
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case 'bottom': p1 = bounds.height; break;
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case 'left': p2 = bounds.width; break;
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}
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}
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} else if (tmp = src.match(/-webkit-gradient\(linear, (\d+)% (\d+)\%, (\d+)% (\d+)%, from\((.*)\), to\((.*)\)\)/)) {
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p0 = (tmp[1] * bounds.width) / 100; p1 = (tmp[2] * bounds.height) / 100;
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p2 = (tmp[3] * bounds.width) / 100; p3 = (tmp[4] * bounds.height) / 100;
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steps.push(tmp[5]);
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steps.push(tmp[6]);
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} else if (tmp = src.match(/-moz-linear-gradient\((\d+)% (\d+)%, (.*)\)/)) {
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p0 = (tmp[1] * bounds.width) / 100; p1 = (tmp[2] * bounds.width) / 100;
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p2 = bounds.width - p0; p3 = bounds.height - p1;
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getColors(tmp[3])
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} else {
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return;
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}
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var lingrad = ctx.createLinearGradient(p0,p1,p2,p3);
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var increment = 1 / (steps.length - 1);
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for (var i = 0, len = steps.length; i < len; i++) {
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lingrad.addColorStop(increment * i, steps[i]);
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}
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ctx.fillStyle = lingrad;
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// draw shapes
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ctx.fillRect(0, 0, bounds.width,bounds.height);
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var img = new Image();
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img.src = canvas.toDataURL();
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this.images.push(src);
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this.images.push(img);
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this.imagesLoaded++;
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this.start();
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}
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html2canvas.prototype.drawBackground = function(el,bounds,ctx){
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@ -306,13 +372,13 @@ html2canvas.prototype.drawBackground = function(el,bounds,ctx){
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var background_image = this.getCSS(el,"background-image");
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var background_repeat = this.getCSS(el,"background-repeat").split(",")[0];
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if (!background_image.match(/data:image\/.*;base64,/i))
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if (!/data:image\/.*;base64,/i.test(background_image) && !/^(-webkit|-moz|linear-gradient|-o-)/.test(background_image)) {
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background_image = this.getCSS(el,"background-image").split(",")[0];
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}
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if (typeof background_image != "undefined" && /^(1|none)$/.test(background_image)==false && /^(-webkit|-moz|linear-gradient|-o-)/.test(background_image)==false){
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if (typeof background_image != "undefined" && /^(1|none)$/.test(background_image)==false) {
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background_image = this.backgroundImageUrl(background_image);
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var image = this.loadImage(background_image);
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var bgp = this.getBackgroundPosition(el,bounds,image),
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bgy;
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@ -449,7 +515,7 @@ html2canvas.prototype.drawBackground = function(el,bounds,ctx){
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*/
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html2canvas.prototype.backgroundImageUrl = function(src){
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if (src.match(/data:image\/.*;base64,/i)) {
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if (/data:image\/.*;base64,/i.test(src) || /^(-webkit|-moz|linear-gradient|-o-)/.test(src)) {
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return src
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}
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if (src.toLowerCase().substr(0,5)=='url("'){
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@ -527,9 +593,6 @@ html2canvas.prototype.getBackgroundPosition = function(el,bounds,image){
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}
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html2canvas.prototype.drawbackgroundRepeatY = function(ctx,image,bgp,x,y,w,h){
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var height,
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@ -800,7 +863,6 @@ html2canvas.prototype.newElement = function(el,parentStack){
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bgbounds.height,
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bgcolor
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);
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this.drawBackground(el,bgbounds,ctx);
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}
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@ -971,10 +1033,14 @@ html2canvas.prototype.getImages = function(el) {
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if (el.nodeType==1 || typeof el.nodeType == "undefined"){
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var background_image = this.getCSS(el,'background-image');
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if (background_image && background_image != "1" && background_image != "none" && background_image.substring(0,7)!="-webkit" && background_image.substring(0,3)!="-o-" && background_image.substring(0,4)!="-moz"){
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// TODO add multi image background support
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var src = this.backgroundImageUrl(background_image.match(/data:image\/.*;base64,/i) ? background_image : background_image.split(",")[0]);
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this.preloadImage(src);
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if (background_image && background_image != "1" && background_image != "none") {
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if (background_image.substring(0,7) == "-webkit" || background_image.substring(0,3) == "-o-" || background_image.substring(0,4) == "-moz") {
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this.drawGradient(background_image, this.getBounds(el))
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} else {
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// TODO add multi image background support
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var src = this.backgroundImageUrl(background_image.match(/data:image\/.*;base64,/i) ? background_image : background_image.split(",")[0]);
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this.preloadImage(src);
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}
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}
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}
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}
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@ -995,10 +1061,6 @@ html2canvas.prototype.loadImage = function(src){
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}
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html2canvas.prototype.preloadImage = function(src){
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@ -51,10 +51,19 @@
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background:url("data:image/jpeg;base64,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");
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background-position: center center;
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}
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.linearGradient {
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/*background: -webkit-gradient(linear, 0% 0%, 0% 100%, from(rgb(255, 0, 0)), to(rgb(0, 0, 255)));*/
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background: -webkit-linear-gradient(top left, #f00, #00f, #BADA55, rgba(0, 0, 255,0.5));
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background: -moz-linear-gradient(top right, #f00, #00f, #BADA55, rgba(0, 0, 255,0.5));
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}
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</style>
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</head>
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<body>
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<div class="medium">
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<div class="linearGradient"> </div>
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</div>
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<div class="medium">
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<div style="background:url(image.jpg);"></div>
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