小编ryo*_*.ss的帖子

我正在使用pdf.js.

但是,PDF的图像质量低.

请告诉我解决方法.

var TARGET_PAGE = 1; 
var PAGE_SCALE = 1; 

function viewPDF(targetPage,pageScale){

PDFJS.getDocument(targetPath).then(function (pdf) {
    return pdf.getPage(targetPage);
}).then(function (page) {
    var scale = pageScale;
    var viewport = page.getViewport(scale);
    var canvas = document.createElement('canvas');
    var context = canvas.getContext('2d');
    canvas.height = viewport.height;
    canvas.width = viewport.width;
    var renderContext = {
        canvasContext: context,
        viewport: viewport
    };
    page.render(renderContext);
        document.body.appendChild(canvas);
});
}