From 8ef184e1cd1b2f479b88015e22cb365c1d517887 Mon Sep 17 00:00:00 2001
From: David Edmundson <kde@davidedmundson.co.uk>
Date: Sat, 25 Mar 2017 12:16:46 +0000
Subject: [PATCH] Implement high DPI support in KWin QPA

Summary: Basically just a copy and paste from the relevant Qt Wayland
parts.

Reviewers: #plasma

Subscribers: plasma-devel

Tags: #plasma

Differential Revision: https://phabricator.kde.org/D5172
---
 plugins/qpa/screen.cpp | 7 ++++++-
 plugins/qpa/screen.h   | 1 +
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/plugins/qpa/screen.cpp b/plugins/qpa/screen.cpp
index 290e1eda0e..e8cd85e4f5 100644
--- a/plugins/qpa/screen.cpp
+++ b/plugins/qpa/screen.cpp
@@ -50,7 +50,7 @@ QImage::Format Screen::format() const
 
 QRect Screen::geometry() const
 {
-    return m_output ? m_output->geometry() : QRect(0, 0, 1, 1);
+    return m_output ? QRect(m_output->globalPosition(), m_output->pixelSize() / m_output->scale()) : QRect(0, 0, 1, 1);
 }
 
 QSizeF Screen::physicalSize() const
@@ -73,5 +73,10 @@ QDpi Screen::logicalDpi() const
     return QPlatformScreen::logicalDpi();
 }
 
+qreal Screen::devicePixelRatio() const
+{
+    return m_output ? (qreal)m_output->scale() : 1.0;
+}
+
 }
 }
diff --git a/plugins/qpa/screen.h b/plugins/qpa/screen.h
index 879ad06a27..7690e1f6bc 100644
--- a/plugins/qpa/screen.h
+++ b/plugins/qpa/screen.h
@@ -49,6 +49,7 @@ public:
     QSizeF physicalSize() const override;
     QPlatformCursor *cursor() const override;
     QDpi logicalDpi() const override;
+    qreal devicePixelRatio() const override;
 
 private:
     QPointer<KWayland::Client::Output> m_output;