From cadfd73ad6f7c288283ec0170740f28b138e703f Mon Sep 17 00:00:00 2001
From: Rainer Hochecker <fernetmenta@online.de>
Date: Wed, 15 Oct 2014 13:21:07 +0200
Subject: [PATCH] X11: expose crtc needed by drm video sync

---
 xbmc-xrandr.c                       |  4 ++--
 xbmc/windowing/X11/WinSystemX11.cpp | 23 ++++++++++++++++++++---
 xbmc/windowing/X11/WinSystemX11.h   |  3 +++
 xbmc/windowing/X11/XRandR.cpp       | 19 +++++++++++++++++++
 xbmc/windowing/X11/XRandR.h         |  2 ++
 5 files changed, 46 insertions(+), 5 deletions(-)

diff --git a/xbmc-xrandr.c b/xbmc-xrandr.c
index 3c686e20593ba..7d164d0a31648 100644
--- a/xbmc-xrandr.c
+++ b/xbmc-xrandr.c
@@ -3005,9 +3005,9 @@ main (int argc, char **argv)
 	    if (mode)
 	    {
 		if (crtc_info) {
-		    printf (" w=\"%d\" h=\"%d\" x=\"%d\" y=\"%d\"",
+		    printf (" w=\"%d\" h=\"%d\" x=\"%d\" y=\"%d\" crtc=\"%d\"",
 			    crtc_info->width, crtc_info->height,
-			    crtc_info->x, crtc_info->y);
+			    crtc_info->x, crtc_info->y, crtc->crtc.index);
 		} else {
 		    printf (" w=\"%d\" h=\"%d\" x=\"%d\" y=\"%d\"",
 			    mode->width, mode->height, output->x, output->y);
diff --git a/xbmc/windowing/X11/WinSystemX11.cpp b/xbmc/windowing/X11/WinSystemX11.cpp
index e5fa05aef80f2..83ad7df0983d2 100644
--- a/xbmc/windowing/X11/WinSystemX11.cpp
+++ b/xbmc/windowing/X11/WinSystemX11.cpp
@@ -217,10 +217,13 @@ bool CWinSystemX11::ResizeWindow(int newWidth, int newHeight, int newLeft, int n
     }
   }
 
-  if(m_nWidth  == newWidth
-  && m_nHeight == newHeight
-  && m_userOutput.compare(m_currentOutput) == 0)
+  if(m_nWidth  == newWidth &&
+     m_nHeight == newHeight &&
+     m_userOutput.compare(m_currentOutput) == 0)
+  {
+    UpdateCrtc();
     return true;
+  }
 
   if (!SetWindow(newWidth, newHeight, false, m_userOutput))
   {
@@ -1232,6 +1235,8 @@ bool CWinSystemX11::SetWindow(int width, int height, bool fullscreen, const std:
 #endif
   }
 
+  UpdateCrtc();
+
   return true;
 }
 
@@ -1423,4 +1428,16 @@ bool CWinSystemX11::HasWindowManager()
   return true;
 }
 
+void CWinSystemX11::UpdateCrtc()
+{
+  XWindowAttributes winattr;
+  int posx, posy;
+  Window child;
+  XGetWindowAttributes(m_dpy, m_mainWindow, &winattr);
+  XTranslateCoordinates(m_dpy, m_mainWindow, RootWindow(m_dpy, m_nScreen), winattr.x, winattr.y,
+                        &posx, &posy, &child);
+
+  m_crtc = g_xrandr.GetCrtc(posx+winattr.width/2, posy+winattr.height/2);
+}
+
 #endif
diff --git a/xbmc/windowing/X11/WinSystemX11.h b/xbmc/windowing/X11/WinSystemX11.h
index 35ae99fbef5bc..d15655482d08a 100644
--- a/xbmc/windowing/X11/WinSystemX11.h
+++ b/xbmc/windowing/X11/WinSystemX11.h
@@ -87,6 +87,7 @@ class CWinSystemX11 : public CWinSystemBase, public ISettingCallback
   void GetConnectedOutputs(std::vector<CStdString> *outputs);
   bool IsCurrentOutput(CStdString output);
   void RecreateWindow();
+  int GetCrtc() { return m_crtc; }
 
 protected:
   bool RefreshGlxContext(bool force);
@@ -118,12 +119,14 @@ class CWinSystemX11 : public CWinSystemBase, public ISettingCallback
   bool                         m_bIsInternalXrr;
   bool                         m_newGlContext;
   int m_MouseX, m_MouseY;
+  int m_crtc;
 
 private:
   bool IsSuitableVisual(XVisualInfo *vInfo);
   static int XErrorHandler(Display* dpy, XErrorEvent* error);
   bool CreateIconPixmap();
   bool HasWindowManager();
+  void UpdateCrtc();
 
   CStopWatch m_screensaverReset;
 };
diff --git a/xbmc/windowing/X11/XRandR.cpp b/xbmc/windowing/X11/XRandR.cpp
index 3102f3d5ac53d..d9d7a8fb1c1fb 100644
--- a/xbmc/windowing/X11/XRandR.cpp
+++ b/xbmc/windowing/X11/XRandR.cpp
@@ -117,6 +117,7 @@ bool CXRandR::Query(bool force, int screennum, bool ignoreoff)
     xoutput.h = (output->Attribute("h") != NULL ? atoi(output->Attribute("h")) : 0);
     xoutput.x = (output->Attribute("x") != NULL ? atoi(output->Attribute("x")) : 0);
     xoutput.y = (output->Attribute("y") != NULL ? atoi(output->Attribute("y")) : 0);
+    xoutput.crtc = (output->Attribute("crtc") != NULL ? atoi(output->Attribute("crtc")) : 0);
     xoutput.wmm = (output->Attribute("wmm") != NULL ? atoi(output->Attribute("wmm")) : 0);
     xoutput.hmm = (output->Attribute("hmm") != NULL ? atoi(output->Attribute("hmm")) : 0);
     if (output->Attribute("rotation") != NULL
@@ -477,6 +478,24 @@ XOutput* CXRandR::GetOutput(CStdString outputName)
   return result;
 }
 
+int CXRandR::GetCrtc(int x, int y)
+{
+  int crtc = 0;
+  for (unsigned int i = 0; i < m_outputs.size(); ++i)
+  {
+    if (!m_outputs[i].isConnected)
+      continue;
+
+    if ((m_outputs[i].x <= x && (m_outputs[i].x+m_outputs[i].w) > x) &&
+        (m_outputs[i].y <= y && (m_outputs[i].y+m_outputs[i].h) > y))
+    {
+      crtc = m_outputs[i].crtc;
+      break;
+    }
+  }
+  return crtc;
+}
+
 CXRandR g_xrandr;
 
 #endif // HAS_XRANDR
diff --git a/xbmc/windowing/X11/XRandR.h b/xbmc/windowing/X11/XRandR.h
index ab7cc63ea6332..4538bad7a94c4 100644
--- a/xbmc/windowing/X11/XRandR.h
+++ b/xbmc/windowing/X11/XRandR.h
@@ -84,6 +84,7 @@ class XOutput
   int h;
   int x;
   int y;
+  int crtc;
   int wmm;
   int hmm;
   std::vector<XMode> modes;
@@ -107,6 +108,7 @@ class CXRandR
   bool IsOutputConnected(CStdString name);
   bool TurnOffOutput(CStdString name);
   bool TurnOnOutput(CStdString name);
+  int GetCrtc(int x, int y);
   //bool Has1080i();
   //bool Has1080p();
   //bool Has720p();