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Add option to use existing canvas for rendering

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Niklas von Hertzen
2014-09-28 22:51:11 +03:00
parent bd1abe1857
commit b60b4b2a45
5 changed files with 66 additions and 10 deletions
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10
dist/html2canvas.js vendored
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@ -628,7 +628,7 @@ function renderWindow(node, container, options, windowWidth, windowHeight) {
var parser = new NodeParser(node, renderer, support, imageLoader, options);
return parser.ready.then(function() {
log("Finished rendering");
var canvas = (options.type !== "view" && (node === clonedWindow.document.body || node === clonedWindow.document.documentElement)) ? renderer.canvas : crop(renderer.canvas, {width: width, height: height, top: bounds.top, left: bounds.left});
var canvas = (options.type !== "view" && (node === clonedWindow.document.body || node === clonedWindow.document.documentElement || options.canvas != null)) ? renderer.canvas : crop(renderer.canvas, {width: width, height: height, top: bounds.top, left: bounds.left});
cleanupContainer(container, options);
return canvas;
});
@ -2679,9 +2679,11 @@ function XHR(url) {
function CanvasRenderer(width, height) {
Renderer.apply(this, arguments);
this.canvas = this.document.createElement("canvas");
this.canvas.width = width;
this.canvas.height = height;
this.canvas = this.options.canvas || this.document.createElement("canvas");
if (!this.options.canvas) {
this.canvas.width = width;
this.canvas.height = height;
}
this.ctx = this.canvas.getContext("2d");
this.taintCtx = this.document.createElement("canvas").getContext("2d");
this.ctx.textBaseline = "bottom";

4
dist/html2canvas.min.js vendored
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