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我使用Open Seadragon在頁面上顯示深度縮放圖像。我想包含一個鏈接來下載圖像。我主要工作,除了下載的圖像是空白的。從畫布中下載圖像:下載圖像爲空
這裏是我使用
function seadragon(){
var url = "http://26.img.americanancestors.org/8e09e1f1-e1e9-4414-a0f5-86a6f09454a2.xml";
var viewer = OpenSeadragon({
id: "databaseviewer",
prefixUrl: "../../Scripts/openseadragon/images/",
tileSources: url,
maxZoomLevel: 20
});
viewer.addHandler('open', function() {
var img = viewer.drawer.canvas.toDataURL("image/png");
console.log(img);
var downloadlink = document.getElementById("download");
downloadlink.href = img;
downloadlink.download = 'SeadragonImage';
});
}
seadragon();