From 9d88cc5f119ea69a9a9e5a8544c5fd8e966e4a7e Mon Sep 17 00:00:00 2001
From: "Enrico Weigelt, metux IT consult" <info@metux.net>
Date: Wed, 26 Feb 2025 17:56:15 +0100
Subject: [PATCH] Revert "mi: drop obsolete miOverlayCopyUnderlay()"

This reverts commit be6985948d6d79c60a08a11f578346f62ab7a448.

Requested by Nvidia - their proprietary driver still needs it.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1843>
---
 mi/mioverlay.c | 11 +++++++++++
 mi/mioverlay.h |  1 +
 2 files changed, 12 insertions(+)

diff --git a/mi/mioverlay.c b/mi/mioverlay.c
index 0c1d79d70..6dd99d89a 100644
--- a/mi/mioverlay.c
+++ b/mi/mioverlay.c
@@ -58,9 +58,14 @@ typedef struct {
 static DevPrivateKeyRec miOverlayWindowKeyRec;
 
 #define miOverlayWindowKey (&miOverlayWindowKeyRec)
+static DevPrivateKeyRec miOverlayScreenKeyRec;
+
+#define miOverlayScreenKey (&miOverlayScreenKeyRec)
 
 static void MarkUnderlayWindow(WindowPtr);
 
+#define MIOVERLAY_GET_SCREEN_PRIVATE(pScreen) ((miOverlayScreenPtr) \
+	dixLookupPrivate(&(pScreen)->devPrivates, miOverlayScreenKey))
 #define MIOVERLAY_GET_WINDOW_PRIVATE(pWin) ((miOverlayWindowPtr) \
 	dixLookupPrivate(&(pWin)->devPrivates, miOverlayWindowKey))
 #define MIOVERLAY_GET_WINDOW_TREE(pWin) \
@@ -97,6 +102,12 @@ miOverlaySetRootClip(ScreenPtr pScreen, Bool enable)
 
 /****************************************************************/
 
+Bool
+miOverlayCopyUnderlay(ScreenPtr pScreen)
+{
+    return MIOVERLAY_GET_SCREEN_PRIVATE(pScreen)->copyUnderlay;
+}
+
 static void
 MarkUnderlayWindow(WindowPtr pWin)
 {
diff --git a/mi/mioverlay.h b/mi/mioverlay.h
index 68a88260a..ca4c06db5 100644
--- a/mi/mioverlay.h
+++ b/mi/mioverlay.h
@@ -9,6 +9,7 @@
 typedef void (*miOverlayTransFunc) (ScreenPtr, int, BoxPtr);
 typedef Bool (*miOverlayInOverlayFunc) (WindowPtr);
 
+extern _X_EXPORT Bool miOverlayCopyUnderlay(ScreenPtr);
 extern _X_EXPORT void miOverlaySetRootClip(ScreenPtr, Bool);
 
 #endif                          /* __MIOVERLAY_H */