我正在尝试在多个画布上显示pdf页面,但是渲染时文本无法正确显示。
我搜索了同样的问题。但是它们都不能解决我的问题。
这里是一个例子:
JS代码
<script>
console.log("hi")
pdfjsLib.getDocument("{{ object.pdf.url }}").then(doc => {
pdfFile = doc
for (var i = 1; i <= 4; i++) {
var canvas = document.getElementById('canvas' + i);
var context = canvas.getContext('2d');
context.font="25px Verdana";
pdfjsLib.disableStream = true;
openPage(doc, i, context);
}
})
function openPage(pdfFile, pageNumber, context) {
var scale = 5;
pdfFile.getPage(pageNumber).then(function (page) {
viewport = page.getViewport(scale);
// reference canvas via context
var canvas = context.canvas;
canvas.width = viewport.width;
canvas.height = viewport.height;
canvas.style.width = "100%";
canvas.style.height = "100%";
var renderContext = {
canvasContext: context
, viewport: viewport
};
page.render(renderContext);
});
}
</script>
pdf.js
<script src="https://cdn.jsdelivr.net/npm/pdfjs-dist@2.0.943/build/pdf.min.js"></script>
html代码
<canvas id="canvas1" width="700" height="300"></canvas>
<canvas id="canvas2" width="500" height="300"></canvas>
<canvas id="canvas3" width="500" height="300"></canvas>
<canvas id="canvas4" width="500" height="300"></canvas>