Как сохранить большое изображение с помощью jsPDF? - PullRequest
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Как сохранить большое изображение с помощью jsPDF?

0 голосов
/ 20 октября 2018

Я хочу отправить большое изображение в формате jsPDF.Моя проблема заключается в том, чтобы сделать это для большого изображения.Я хочу сохранить разрешение изображения.У меня размер изображения в пикселях, но я не могу установить размер в jsPDF.Я делаю следующее: 

var pdf = new jsPDF();
var imgData = 'data:image/png;base64,iV...';

pdf.setFontSize(40);
pdf.text(35, 25, "Octonyan loves jsPDF");
pdf.addImage(imgData, 'JPEG', 15, 40, 180, 180);
pdf.save();

Запуск по jsFiddle .

Код создает PDF, но не защищает разрешение изображения.

1 Ответ

0 голосов
/ 20 октября 2018

использовать new jsPDF('l', 'px', [pdfHeight, pdfWidth]); первый параметр (альбомная или книжная) второй - это единица измерения

это Jsfiddle 

var imgData = 'data:image/png;base64,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var button = document.createElement('button');
var img = document.createElement('img');
img.src = imgData;
img.onload = function(){
button.onclick = function(){
  var pdf = new jsPDF();
  var left = 15, top = 40;  
  
  var width = pdf.internal.pageSize.getWidth();
  var maxWidth = (width - left*2);
  var newWidth = img.naturalWidth < maxWidth ? img.naturalWidth : maxWidth;
  var newHeight = img.naturalHeight*newWidth/img.naturalWidth;
  
  var left = 15, top = 40;
  var pdf = new jsPDF('l', 'px', [img.naturalHeight+top*2, img.naturalWidth+left*2]);  
  
  pdf.setFontSize(40);
  pdf.text(35, 25, "Octonyan loves jsPDF");
  pdf.addImage(imgData, 'JPEG', left, top, img.naturalWidth, img.naturalHeight);
  pdf.save();
};
button.innerText = 'Create PDF and Download It'
document.body.appendChild(button);
}
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...