From b1fecac60af1d1b868dcb8c9cc0f8971b87d0a8a Mon Sep 17 00:00:00 2001
From: NiBrc <26893899+NiBrc@users.noreply.github.com>
Date: Wed, 17 Jan 2024 15:25:23 +0100
Subject: [PATCH] fixed device scaling ratio as outlined in
 https://github.com/jacomyal/sigma.js/issues/1399

---
 packages/sigma/src/sigma.ts | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/packages/sigma/src/sigma.ts b/packages/sigma/src/sigma.ts
index aacc33d8c..95995b97a 100644
--- a/packages/sigma/src/sigma.ts
+++ b/packages/sigma/src/sigma.ts
@@ -404,8 +404,8 @@ export default class Sigma<GraphType extends Graph = Graph> extends TypedEventEm
       gl.TEXTURE_2D,
       0,
       gl.RGBA,
-      this.width / this.pickingDownSizingRatio,
-      this.height / this.pickingDownSizingRatio,
+      this.width * this.pixelRatio / this.pickingDownSizingRatio,
+      this.height * this.pixelRatio / this.pickingDownSizingRatio,
       0,
       gl.RGBA,
       gl.UNSIGNED_BYTE,
@@ -448,7 +448,10 @@ export default class Sigma<GraphType extends Graph = Graph> extends TypedEventEm
    */
   private getNodeAtPosition(position: Coordinates): string | null {
     const { x, y } = position;
-    const color = getPixelColor(this.webGLContexts.nodes, this.frameBuffers.nodes, x, y, this.pickingDownSizingRatio);
+    const canvasX = x * this.pixelRatio
+    const canvasY = y * this.pixelRatio
+
+    const color = getPixelColor(this.webGLContexts.nodes, this.frameBuffers.nodes, canvasX, canvasY, this.pickingDownSizingRatio);
     const index = colorToIndex(...color);
     const itemAt = this.itemIDsIndex[index];
 
@@ -2115,4 +2118,4 @@ export default class Sigma<GraphType extends Graph = Graph> extends TypedEventEm
   getCanvases(): PlainObject<HTMLCanvasElement> {
     return { ...this.elements };
   }
-}
+}
\ No newline at end of file