fork from https://github.com/mozilla/pdf.js.git

2026-06-08 13:26:57 +02:00
parent be60be5b03
commit 141762041b
2444 changed files with 1179392 additions and 15 deletions
--- a/examples/learning/helloworld64.html
+++ b/examples/learning/helloworld64.html
@@ -0,0 +1,77 @@
+<!doctype html>
+<html>
+  <head>
+    <meta charset="UTF-8" />
+    <title>'Hello, world!' base64 example</title>
+  </head>
+  <body>
+    <h1>'Hello, world!' example</h1>
+
+    <canvas id="the-canvas" style="border: 1px solid black; direction: ltr"></canvas>
+
+    <script src="../../node_modules/pdfjs-dist/build/pdf.mjs" type="module"></script>
+
+    <script id="script" type="module">
+      // atob() is used to convert base64 encoded PDF to binary-like data.
+      // (See also https://developer.mozilla.org/en-US/docs/Web/API/WindowBase64/
+      // Base64_encoding_and_decoding.)
+      var pdfData = atob(
+        "JVBERi0xLjcKCjEgMCBvYmogICUgZW50cnkgcG9pbnQKPDwKICAvVHlwZSAvQ2F0YWxvZwog" +
+          "IC9QYWdlcyAyIDAgUgo+PgplbmRvYmoKCjIgMCBvYmoKPDwKICAvVHlwZSAvUGFnZXMKICAv" +
+          "TWVkaWFCb3ggWyAwIDAgMjAwIDIwMCBdCiAgL0NvdW50IDEKICAvS2lkcyBbIDMgMCBSIF0K" +
+          "Pj4KZW5kb2JqCgozIDAgb2JqCjw8CiAgL1R5cGUgL1BhZ2UKICAvUGFyZW50IDIgMCBSCiAg" +
+          "L1Jlc291cmNlcyA8PAogICAgL0ZvbnQgPDwKICAgICAgL0YxIDQgMCBSIAogICAgPj4KICA+" +
+          "PgogIC9Db250ZW50cyA1IDAgUgo+PgplbmRvYmoKCjQgMCBvYmoKPDwKICAvVHlwZSAvRm9u" +
+          "dAogIC9TdWJ0eXBlIC9UeXBlMQogIC9CYXNlRm9udCAvVGltZXMtUm9tYW4KPj4KZW5kb2Jq" +
+          "Cgo1IDAgb2JqICAlIHBhZ2UgY29udGVudAo8PAogIC9MZW5ndGggNDQKPj4Kc3RyZWFtCkJU" +
+          "CjcwIDUwIFRECi9GMSAxMiBUZgooSGVsbG8sIHdvcmxkISkgVGoKRVQKZW5kc3RyZWFtCmVu" +
+          "ZG9iagoKeHJlZgowIDYKMDAwMDAwMDAwMCA2NTUzNSBmIAowMDAwMDAwMDEwIDAwMDAwIG4g" +
+          "CjAwMDAwMDAwNzkgMDAwMDAgbiAKMDAwMDAwMDE3MyAwMDAwMCBuIAowMDAwMDAwMzAxIDAw" +
+          "MDAwIG4gCjAwMDAwMDAzODAgMDAwMDAgbiAKdHJhaWxlcgo8PAogIC9TaXplIDYKICAvUm9v" +
+          "dCAxIDAgUgo+PgpzdGFydHhyZWYKNDkyCiUlRU9G"
+      );
+
+      //
+      // The workerSrc property shall be specified.
+      //
+      pdfjsLib.GlobalWorkerOptions.workerSrc = "../../node_modules/pdfjs-dist/build/pdf.worker.mjs";
+
+      // Opening PDF by passing its binary data as a string. It is still preferable
+      // to use Uint8Array, but string or array-like structure will work too.
+      var loadingTask = pdfjsLib.getDocument({ data: pdfData });
+      var pdf = await loadingTask.promise;
+      // Fetch the first page.
+      var page = await pdf.getPage(1);
+      var scale = 1.5;
+      var viewport = page.getViewport({ scale: scale });
+      // Support HiDPI-screens.
+      var outputScale = window.devicePixelRatio || 1;
+
+      // Prepare canvas using PDF page dimensions.
+      var canvas = document.getElementById("the-canvas");
+      var context = canvas.getContext("2d");
+
+      canvas.width = Math.floor(viewport.width * outputScale);
+      canvas.height = Math.floor(viewport.height * outputScale);
+      canvas.style.width = Math.floor(viewport.width) + "px";
+      canvas.style.height = Math.floor(viewport.height) + "px";
+
+      var transform = outputScale !== 1 ? [outputScale, 0, 0, outputScale, 0, 0] : null;
+
+      // Render PDF page into canvas context.
+      var renderContext = {
+        canvasContext: context,
+        transform,
+        viewport,
+      };
+      page.render(renderContext);
+    </script>
+
+    <hr />
+    <h2>JavaScript code:</h2>
+    <pre id="code"></pre>
+    <script>
+      document.getElementById("code").textContent = document.getElementById("script").text;
+    </script>
+  </body>
+</html>