From a443a635a12bb30d14c74bf85cdc0051d3f6595c Mon Sep 17 00:00:00 2001
From: Jonas Jenwald <jonas.jenwald@gmail.com>
Date: Thu, 18 Jun 2026 17:47:26 +0200
Subject: [PATCH 1/2] Remove the unused `HTMLElement` branch in the
 `paintInlineImageXObject` method

This branch isn't covered by any tests, and as far as I can tell it's been unused ever since PR 11601 which simplified the JPEG image handling.
Prior to that we'd create an `Image` instance in one case, see [this code](https://github.com/mozilla/pdf.js/pull/11601/changes#diff-082d6b37ad01db7ac97cc07c6ddb0dc52040484c5ef91b110b072f50144d9f39L2312-L2314), which is why that branch was necessary since `new Image()` creates a `HTMLImageElement` instance which in itself is an instance of `HTMLElement`; note [this](https://developer.mozilla.org/en-US/docs/Web/API/HTMLImageElement/Image) respectively [this](https://developer.mozilla.org/en-US/docs/Web/API/HTMLImageElement).
---
 src/display/canvas.js | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/src/display/canvas.js b/src/display/canvas.js
index dc6eb165a..f77fe8a49 100644
--- a/src/display/canvas.js
+++ b/src/display/canvas.js
@@ -3996,12 +3996,6 @@ class CanvasGraphics {
       const result = this.applyTransferMapsToBitmap(imgData);
       imgToPaint = result.img;
       inlineImgCanvas = result.canvasEntry;
-    } else if (
-      (typeof HTMLElement === "function" && imgData instanceof HTMLElement) ||
-      !imgData.data
-    ) {
-      // typeof check is needed due to node.js support, see issue #8489
-      imgToPaint = imgData;
     } else {
       const tmpCanvas = this.canvasFactory.create(width, height);
       putBinaryImageData(tmpCanvas.context, imgData);

From b4b0a3fa0460664949d9e3dc3f95166a6b9c3e35 Mon Sep 17 00:00:00 2001
From: Jonas Jenwald <jonas.jenwald@gmail.com>
Date: Thu, 18 Jun 2026 17:59:57 +0200
Subject: [PATCH 2/2] Remove the unused `ImageData` branch in the
 `putBinaryImageData` function

This branch isn't covered by any tests, and looking at the two existing call-sites we only ever pass in a `CanvasRenderingContext2D` interface to this function.
Based on the git history this branch was added in PR 3312, however as far as I can tell it doesn't actually appear to have been necessary even back then!?
---
 src/display/canvas.js     | 5 -----
 src/display/node_utils.js | 7 -------
 2 files changed, 12 deletions(-)

diff --git a/src/display/canvas.js b/src/display/canvas.js
index f77fe8a49..47d2a296f 100644
--- a/src/display/canvas.js
+++ b/src/display/canvas.js
@@ -320,11 +320,6 @@ class CanvasExtraState {
 }
 
 function putBinaryImageData(ctx, imgData) {
-  if (imgData instanceof ImageData) {
-    ctx.putImageData(imgData, 0, 0);
-    return;
-  }
-
   // Put the image data to the canvas in chunks, rather than putting the
   // whole image at once.  This saves JS memory, because the ImageData object
   // is smaller. It also possibly saves C++ memory within the implementation
diff --git a/src/display/node_utils.js b/src/display/node_utils.js
index 156832c9f..470f2c480 100644
--- a/src/display/node_utils.js
+++ b/src/display/node_utils.js
@@ -51,13 +51,6 @@ if (isNodeJS) {
         warn("Cannot polyfill `DOMMatrix`, rendering may be broken.");
       }
     }
-    if (!globalThis.ImageData) {
-      if (canvas?.ImageData) {
-        globalThis.ImageData = canvas.ImageData;
-      } else {
-        warn("Cannot polyfill `ImageData`, rendering may be broken.");
-      }
-    }
     if (!globalThis.Path2D) {
       if (canvas?.Path2D) {
         globalThis.Path2D = canvas.Path2D;