From e6162f5c8acea642fd0884a6b8db367b911e5461 Mon Sep 17 00:00:00 2001
From: pommicket <pommicket@gmail.com>
Date: Wed, 6 Sep 2023 23:55:57 -0400
Subject: set preserveDrawingBuffer context attribute

---
 pugl.js | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

(limited to 'pugl.js')

diff --git a/pugl.js b/pugl.js
index 7708b31..aea16fd 100644
--- a/pugl.js
+++ b/pugl.js
@@ -2822,10 +2822,16 @@ function startup() {
 		if (!has_error()) export_widgets_to_local_storage();
 	});
 
-	gl = canvas.getContext('webgl2');
+	const context_attributes = {
+		// without this, "save image as..." is broken on firefox
+		//  see https://bugzilla.mozilla.org/show_bug.cgi?id=749824
+		preserveDrawingBuffer: true,
+	};
+
+	gl = canvas.getContext('webgl2', context_attributes);
 	if (gl === null) {
 		// support for very-old-but-not-ancient browsers
-		gl = canvas.getContext('experimental-webgl2');
+		gl = canvas.getContext('experimental-webgl2', context_attributes);
 		if (gl === null) {
 			show_error('your browser doesnt support webgl2.\noh well.');
 			return;
-- 
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