From 2eefb53f58854ef9d34859583207ec37d3c3047a Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Tue, 6 Sep 2016 13:15:36 +0200
Subject: [PATCH] randr: Add RRHasScanoutPixmap helper function
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This is a preparation patch for adding prime hw-cursor support.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
---
 randr/randrstr.h |  6 ++++++
 randr/rrcrtc.c   | 19 +++++++++++++++++++
 2 files changed, 25 insertions(+)

diff --git a/randr/randrstr.h b/randr/randrstr.h
index 1baa91226e..706e9a7b03 100644
--- a/randr/randrstr.h
+++ b/randr/randrstr.h
@@ -725,6 +725,12 @@ extern _X_EXPORT void
 extern _X_EXPORT Bool
  RRReplaceScanoutPixmap(DrawablePtr pDrawable, PixmapPtr pPixmap, Bool enable);
 
+/*
+ * Return if the screen has any scanout_pixmap's attached
+ */
+extern _X_EXPORT Bool
+ RRHasScanoutPixmap(ScreenPtr pScreen);
+
 /*
  * Crtc dispatch
  */
diff --git a/randr/rrcrtc.c b/randr/rrcrtc.c
index 8fb2bca8aa..76365919ad 100644
--- a/randr/rrcrtc.c
+++ b/randr/rrcrtc.c
@@ -1945,3 +1945,22 @@ RRReplaceScanoutPixmap(DrawablePtr pDrawable, PixmapPtr pPixmap, Bool enable)
 
     return ret;
 }
+
+Bool
+RRHasScanoutPixmap(ScreenPtr pScreen)
+{
+    rrScrPriv(pScreen);
+    int i;
+
+    if (!pScreen->is_output_slave)
+        return FALSE;
+
+    for (i = 0; i < pScrPriv->numCrtcs; i++) {
+        RRCrtcPtr crtc = pScrPriv->crtcs[i];
+
+        if (crtc->scanout_pixmap)
+            return TRUE;
+    }
+    
+    return FALSE;
+}