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我想下載一個畫布作爲圖像(jpeg),畫布由來自兩個域的兩幅圖像組成。我有這樣的代碼:下載畫布作爲來自不同領域的圖像,在javascript中
var img1 = new Image();
img1.src = "domain1/image.jpeg";
var img2 = new Image();
img2.src = "domain2/image.png";
var canvas = document.querySelector("#canvas");
var context = canvas.getContext("2d");
img1.onload = function(){
// Some code to define width and height of canvas
context.drawImage(img1, 0, 0);
context.drawImage(img2, 0, 0);
};
var link = document.getElementById("download");
link.addListener('click', function(){
link.href = canvas.toDataURL("image/jpeg");
link.download = "final_image.jpeg";
});
和HTML文件:
<canvas id="canvas">
</canvas>
<a id="download">Download</a>
但它不工作...如果我刪除這兩個drawImage
它的工作。
歡迎來到Stack Overflow Romain Guillot!你有沒有[檢查你的控制檯?](http://stackoverflow.com/documentation/javascript/185/getting-started-with-javascript/714/using-console-log)它可能會提供解決問題的有用線索。 –
[Canvas by cross-origin data]可能的重複](http://stackoverflow.com/questions/13674835/canvas-tainted-by-cross-origin-data) – powerc9000