我正在尝试运行相同的程序,但具有不同的比例。但它给了我破碎的照片。那么更新比例的正确方法是什么?
function draw(num, scale) {
pdfDoc.getPage(num).then(function(page) {
var viewport = page.getViewport(scale);
var canvas = document.getElementById('the-canvas');
var context = canvas.getContext('2d');
canvas.height = viewport.height;
canvas.width = viewport.width;
var renderContext = {
canvasContext: context,
viewport: viewport
};
page.render(renderContext);
}
}
draw(1, 1);
draw(1, 2);