From 83fb246119f0a25a7551ec2771e534c706407efb Mon Sep 17 00:00:00 2001
From: bymyself <cbyrne@comfy.org>
Date: Sun, 2 Mar 2025 23:06:15 -0700
Subject: [PATCH] Fix Selection Marquee display is offset when DPI < 1 (#692)

Fixes https://github.com/Comfy-Org/ComfyUI_frontend/issues/2481. The
canvas scaling behavior is not consistent with DPI which is the source
of many bugs. To verify, add console log somewhere:
---
 src/LGraphCanvas.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/LGraphCanvas.ts b/src/LGraphCanvas.ts
index cfd563d71..b22121586 100644
--- a/src/LGraphCanvas.ts
+++ b/src/LGraphCanvas.ts
@@ -4179,7 +4179,7 @@ export class LGraphCanvas implements ConnectionColorContext {
         if (eDown && eMove) {
           // Do not scale the selection box
           const transform = ctx.getTransform()
-          const ratio = window.devicePixelRatio
+          const ratio = Math.max(1, window.devicePixelRatio)
           ctx.setTransform(ratio, 0, 0, ratio, 0, 0)
 
           const x = eDown.safeOffsetX