From f1a54190bc2e940039e3a3e524a5c5531ec76e62 Mon Sep 17 00:00:00 2001
From: fxbrit <8320298-fxbrit@users.noreply.gitlab.com>
Date: Sun, 30 Jul 2023 23:19:03 +0200
Subject: [PATCH] spoof DPR to 2 when RFP is in use

The idea is to improve usability by reducing blurrines on some websites, even tho this increases memory usage.
Ideally -moz-device-pixel-ratio should also be patched to match the value, but that is an issue regardless of DPR value so only tangential.
---
 assets/patches.txt               |  1 +
 patches/rfp-spoof-dpr-to-2.patch | 13 +++++++++++++
 2 files changed, 14 insertions(+)
 create mode 100644 patches/rfp-spoof-dpr-to-2.patch

diff --git a/assets/patches.txt b/assets/patches.txt
index afc2a6b..41bad67 100644
--- a/assets/patches.txt
+++ b/assets/patches.txt
@@ -12,6 +12,7 @@ patches/librewolf-prefs.patch
 patches/mozilla_dirs.patch
 patches/msix.patch
 patches/remove_addons.patch
+patches/rfp-spoof-dpr-to-2.patch
 patches/sed-patches/allow-searchengines-non-esr.patch
 patches/sed-patches/disable-pocket.patch
 patches/sed-patches/stop-undesired-requests.patch
diff --git a/patches/rfp-spoof-dpr-to-2.patch b/patches/rfp-spoof-dpr-to-2.patch
new file mode 100644
index 0000000..b0404e0
--- /dev/null
+++ b/patches/rfp-spoof-dpr-to-2.patch
@@ -0,0 +1,13 @@
+diff --git a/dom/base/nsGlobalWindowInner.cpp b/dom/base/nsGlobalWindowInner.cpp
+index 3a97351..c15f9a4 100644
+--- a/dom/base/nsGlobalWindowInner.cpp
++++ b/dom/base/nsGlobalWindowInner.cpp
+@@ -3616,7 +3616,7 @@ double nsGlobalWindowInner::GetDevicePixelRatio(CallerType aCallerType,
+     nsAutoCString origin;
+     nsresult rv = this->GetPrincipal()->GetOrigin(origin);
+     if (NS_FAILED(rv) || origin != "resource://pdf.js"_ns) {
+-      return 1.0;
++      return 2.0;
+     }
+   }
+