From ef13cf1489d7ce9d015d5e761e48bd476c9b6cd1 Mon Sep 17 00:00:00 2001
From: Steffen Ritter
Date: Thu, 10 Nov 2016 17:14:02 +0100
Subject: Fix beamer detection in clone mode for some cases

* clone mode is now detected by checking if x starts at upper left
  corner for all crtcs. Not only if the reported width/height is 0

* treat the output with the largest diagonale as beamer if no
  output has a width/height of 0
---
 src/widget.cpp | 76 +++++++++++++++++++++++++++++++++++++++-------------------
 src/widget.h   |  1 +
 2 files changed, 52 insertions(+), 25 deletions(-)

diff --git a/src/widget.cpp b/src/widget.cpp
index c418d0e..8833630 100644
--- a/src/widget.cpp
+++ b/src/widget.cpp
@@ -10,6 +10,7 @@
 #include "widget.h"
 #include "ui_widget.h"
 #include "timeoutdialog.h"
+#include "math.h"
 
 //______________________________________________________________________________
 Widget::Widget(QWidget *parent) :
@@ -33,35 +34,39 @@ Widget::Widget(QWidget *parent) :
       qDebug() << "Normal output";
       exit(0);
       break;
-    /*************************************************************************/
     case 2: // In case of two connected outputs
 
-      // Check if one of the connected outputs is a beamer. This program only
-      // adresses cases in which eiter of the outouts is a beamer. Meaning
-      // either output one has dimension zero or output tow has no dimension.
-#ifdef QT_DEBUG
-      if ( true ) {
-#else
-      if ( ((_outputMap[_connectedOutputList[0]]->mm_width == 0
-           && _outputMap[_connectedOutputList[0]]->mm_height == 0 )
-          && ! (_outputMap[_connectedOutputList[1]]->mm_width == 0
-           && _outputMap[_connectedOutputList[1]]->mm_height == 0 ))
-          || ( ! (_outputMap[_connectedOutputList[0]]->mm_width == 0
-           && _outputMap[_connectedOutputList[0]]->mm_height == 0 )
-          && (_outputMap[_connectedOutputList[1]]->mm_width == 0
-           && _outputMap[_connectedOutputList[1]]->mm_height == 0 )) ) {
-#endif
+      qDebug() << "Two connected outputs";
+
+      // Check if we are in clone mode
+      if (cloneMode()) {
+
+        qDebug() << "Clone mode!";
 
-        qDebug() << "BEAMER CONNECTED!";
+        double_t w0 = _outputMap[_connectedOutputList[0]]->mm_width;
+        double_t h0 = _outputMap[_connectedOutputList[0]]->mm_height;
+
+        double_t w1 = _outputMap[_connectedOutputList[1]]->mm_width;
+        double_t h1 = _outputMap[_connectedOutputList[1]]->mm_height;
 
         // Get a human readable reference
-        if (_outputMap[_connectedOutputList[0]]->mm_width == 0
-             && _outputMap[_connectedOutputList[0]]->mm_height == 0 ) {
+        if (w0 == 0 && h0 == 0) {
           _beamer = _connectedOutputList[0];
           _monitor = _connectedOutputList[1];
-        } else {
+        } else if (w1 == 0 && h1 == 0) {
           _beamer = _connectedOutputList[1];
           _monitor = _connectedOutputList[0];
+        } else {
+          double_t d0 = sqrt((pow(w0, 2) * pow(h0, 2)));
+          double_t d1 = sqrt((pow(w1, 2) * pow(h1, 2)));
+
+          if (d0 > d1) {
+            _beamer = _connectedOutputList[0];
+            _monitor = _connectedOutputList[1];
+          } else {
+            _beamer = _connectedOutputList[1];
+            _monitor = _connectedOutputList[0];
+          }
         }
 
         // Intersect them by the resolution sorted, dont care about O(n³)
@@ -72,7 +77,7 @@ Widget::Widget(QWidget *parent) :
 
           XRRModeInfo* monitorMode = _modeMap[_outputMap[_monitor]->modes[i]];
 
-          // Skip interlaces modes
+          // Skip interlace modes
           if ( monitorMode->modeFlags & RR_Interlace )
             continue;
 
@@ -81,7 +86,7 @@ Widget::Widget(QWidget *parent) :
 
             XRRModeInfo* beamerMode = _modeMap[_outputMap[_beamer]->modes[j]];
 
-            // Skip interlaces modes
+            // Skip interlace modes
             if ( beamerMode->modeFlags & RR_Interlace )
               continue;
 
@@ -162,7 +167,7 @@ Widget::Widget(QWidget *parent) :
 
           // Compute the aspect ratio of the beamer
           float aspectRatio = (float)_modeMap[preferredBeamerModeId]->width
-                     / _modeMap[preferredBeamerModeId]->height;          
+                     / _modeMap[preferredBeamerModeId]->height;
 
           // Fill widget with data
           for (QList<QPair<XRRModeInfo*, XRRModeInfo*> >::iterator i
@@ -217,7 +222,7 @@ Widget::Widget(QWidget *parent) :
       // If NEITHER of the outputs is a beamer (likely dualscreen setup)
       else {
         // TODO(manuel): Future feature. Setup dualscreen
-        qDebug() << "Dual output";
+        qDebug() << "Dual output with extended screen";
         exit(0);
       }
       break;
@@ -300,7 +305,7 @@ Widget::~Widget() {
 
 
 //______________________________________________________________________________
-void Widget::handleButton(){  
+void Widget::handleButton(){
 
   /*************************** Backup the crtcinfos ***************************/
 
@@ -448,4 +453,25 @@ void Widget::handleButton(){
   updateScreenResources();
 }
 
+bool Widget::cloneMode()
+{
+  bool cloneMode = true;
+
+  for (CrtcMap::iterator it = _crtcMap.begin(); it != _crtcMap.end(); it++) {
+    XRRCrtcInfo* crtc = it.value();
+
+    // check if x starts on upper left corner
+    if (crtc->x != 0 || crtc->y != 0) {
+      cloneMode = false;
+    }
+
+    qDebug() << "width: " << crtc->width
+             << "height: " << crtc->height
+             << "x: " << crtc->x
+             << "y: " << crtc->y
+             << "mode: " << crtc->mode;
+  }
+
+  return cloneMode;
+}
 ////////////////////////////////////////////////////////////////////////////////
diff --git a/src/widget.h b/src/widget.h
index a737412..31b9a95 100644
--- a/src/widget.h
+++ b/src/widget.h
@@ -43,6 +43,7 @@ public:
 private:
     void timeout();
     void updateScreenResources();
+    bool cloneMode();
 
     Ui::Widget *        _ui;
     Display*            _display;
-- 
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