From 24cc93ec5b9a640e9a6ffd2c22b723da20ef001e Mon Sep 17 00:00:00 2001
From: Aleix Pol <aleixpol@kde.org>
Date: Thu, 29 Jul 2021 04:07:13 +0200
Subject: [PATCH] effects: Allow exposing an EffectScreen::transform

This way an effect can know the transformation that is applied on a
display.
---
 src/abstract_output.h            | 13 +++++++++++++
 src/abstract_wayland_output.h    | 14 +-------------
 src/effects.cpp                  |  5 +++++
 src/effects.h                    |  1 +
 src/libkwineffects/kwineffects.h | 14 ++++++++++++++
 5 files changed, 34 insertions(+), 13 deletions(-)

diff --git a/src/abstract_output.h b/src/abstract_output.h
index a93af2a360..cc47116830 100644
--- a/src/abstract_output.h
+++ b/src/abstract_output.h
@@ -207,6 +207,19 @@ public:
      */
     static std::chrono::milliseconds dimAnimationTime();
 
+    enum class Transform {
+        Normal,
+        Rotated90,
+        Rotated180,
+        Rotated270,
+        Flipped,
+        Flipped90,
+        Flipped180,
+        Flipped270
+    };
+    Q_ENUM(Transform)
+    virtual Transform transform() const { return Transform::Normal; }
+
 Q_SIGNALS:
     /**
      * This signal is emitted when the geometry of this output has changed.
diff --git a/src/abstract_wayland_output.h b/src/abstract_wayland_output.h
index ea6f6d801c..2b07e37c84 100644
--- a/src/abstract_wayland_output.h
+++ b/src/abstract_wayland_output.h
@@ -32,18 +32,6 @@ class KWIN_EXPORT AbstractWaylandOutput : public AbstractOutput
 {
     Q_OBJECT
 public:
-    enum class Transform {
-        Normal,
-        Rotated90,
-        Rotated180,
-        Rotated270,
-        Flipped,
-        Flipped90,
-        Flipped180,
-        Flipped270
-    };
-    Q_ENUM(Transform)
-
     enum class ModeFlag : uint {
         Current = 0x1,
         Preferred = 0x2,
@@ -106,7 +94,7 @@ public:
      * - Rotated 270° and flipped along the horizontal axis is inv. portrait + inv. landscape +
      *   portrait
      */
-    Transform transform() const;
+    Transform transform() const override;
 
     int refreshRate() const override;
 
diff --git a/src/effects.cpp b/src/effects.cpp
index e80bc18e5b..d79347beb7 100644
--- a/src/effects.cpp
+++ b/src/effects.cpp
@@ -1754,6 +1754,11 @@ QRect EffectScreenImpl::geometry() const
     return m_platformOutput->geometry();
 }
 
+EffectScreen::Transform EffectScreenImpl::transform() const
+{
+    return EffectScreen::Transform(m_platformOutput->transform());
+}
+
 //****************************************
 // EffectWindowImpl
 //****************************************
diff --git a/src/effects.h b/src/effects.h
index c61b8b4c53..2c17452de2 100644
--- a/src/effects.h
+++ b/src/effects.h
@@ -369,6 +369,7 @@ public:
     QString name() const override;
     qreal devicePixelRatio() const override;
     QRect geometry() const override;
+    Transform transform() const override;
 
 private:
     AbstractOutput *m_platformOutput;
diff --git a/src/libkwineffects/kwineffects.h b/src/libkwineffects/kwineffects.h
index 53e3d2f5a5..de93144896 100644
--- a/src/libkwineffects/kwineffects.h
+++ b/src/libkwineffects/kwineffects.h
@@ -1853,6 +1853,20 @@ public:
      */
     virtual QRect geometry() const = 0;
 
+
+    enum class Transform {
+        Normal,
+        Rotated90,
+        Rotated180,
+        Rotated270,
+        Flipped,
+        Flipped90,
+        Flipped180,
+        Flipped270
+    };
+    Q_ENUM(Transform)
+    virtual Transform transform() const = 0;
+
 Q_SIGNALS:
     /**
      * Notifies that the display will be dimmed in @p time ms.