From 3d4036210d85d59836d5f0471a95e863e0b728c4 Mon Sep 17 00:00:00 2001
From: Huang-Huang Bao <i@eh5.me>
Date: Mon, 20 Nov 2023 06:14:55 +0800
Subject: [PATCH] scene: use fractionalGeometry() as input of RenderViewport
 renderRect

Fixes mismatches between renderTarget.size() and deivce geometry calculated using viewport.renderRect() * viewport.scale() .

BUG: 475325
---
 src/scene/workspacescene.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/scene/workspacescene.cpp b/src/scene/workspacescene.cpp
index 0e1064773c..c4066bd62b 100644
--- a/src/scene/workspacescene.cpp
+++ b/src/scene/workspacescene.cpp
@@ -372,7 +372,7 @@ void WorkspaceScene::postPaint()
 void WorkspaceScene::paint(const RenderTarget &renderTarget, const QRegion &region)
 {
     Output *output = kwinApp()->operationMode() == Application::OperationMode::OperationModeX11 ? nullptr : painted_screen;
-    RenderViewport viewport(output ? output->geometry() : workspace()->geometry(), output ? output->scale() : 1, renderTarget);
+    RenderViewport viewport(output ? output->fractionalGeometry() : workspace()->geometry(), output ? output->scale() : 1, renderTarget);
 
     m_renderer->beginFrame(renderTarget, viewport);