From 1ea2ff8cf7f9a012fafc4b910e940aa5627ccaa6 Mon Sep 17 00:00:00 2001
From: Ken Moore <ken@ixsystems.com>
Date: Thu, 22 Jun 2017 13:50:48 -0400
Subject: Get the LuminaRandR framework able to enable/resize/move a monitor as
 requested. NOTE: The automatic resolution routine picks the larges one
 available for the monitor, but some monitors lie and don't actually support
 all the listed resolutions (probably because I am using an HDMI->VGA
 converter on my Laptop output right now).

---
 src-qt5/core/libLumina/LuminaRandR-X11.cpp | 67 +++++++++++++++++++++++++++---
 src-qt5/core/libLumina/LuminaRandR.h       |  4 +-
 src-qt5/core/libLumina/test/main.cpp       | 19 +++++++--
 3 files changed, 79 insertions(+), 11 deletions(-)

(limited to 'src-qt5/core/libLumina')

diff --git a/src-qt5/core/libLumina/LuminaRandR-X11.cpp b/src-qt5/core/libLumina/LuminaRandR-X11.cpp
index a78821db..8fcdbad0 100644
--- a/src-qt5/core/libLumina/LuminaRandR-X11.cpp
+++ b/src-qt5/core/libLumina/LuminaRandR-X11.cpp
@@ -40,6 +40,7 @@ inline bool loadScreenInfo(p_objects *p_obj){
   p_obj->primary = false;
   p_obj->modes.clear();
   p_obj->resolutions.clear();
+  p_obj->crtc = 0;
 
   //Get the information associated with the output and save it in the p_objects cache
   xcb_randr_get_output_info_reply_t *info = xcb_randr_get_output_info_reply(QX11Info::connection(),
@@ -55,6 +56,11 @@ inline bool loadScreenInfo(p_objects *p_obj){
     for(int j=0; j<mode_len; j++){
       p_obj->modes.append( xcb_randr_get_output_info_modes(info)[j] );
     }
+    //int pref_len = info->num_preferred;
+    //qDebug() << "Modes:" << p_obj->modes << "Num Preferred:" << pref_len;
+    /*for(int j=0; j<pref_len; j++){
+      p_obj->preferred.append( xcb_randr_get_output_info_preferred(info)[j] );
+    }*/
   p_obj->crtc = info->crtc;
   free(info); //done with output_info
 
@@ -102,11 +108,19 @@ inline xcb_randr_mode_t modeForResolution(QSize res, QList<xcb_randr_mode_t> mod
 		xcb_randr_get_screen_resources_unchecked(QX11Info::connection(), QX11Info::appRootWindow()), NULL);
   if(srreply!=0){
     unsigned int refreshrate = 0;
+    QSize sz;
     for(int i=0; i<xcb_randr_get_screen_resources_modes_length(srreply); i++){
       xcb_randr_mode_info_t minfo = xcb_randr_get_screen_resources_modes(srreply)[i];
       if(modes.contains(minfo.id)){
-        QSize sz(minfo.width, minfo.height);
-        if(sz == res && minfo.dot_clock > refreshrate){ det_mode = minfo.id; refreshrate = minfo.dot_clock; }
+        if(res.isNull() && (minfo.width > sz.width() || minfo.height > sz.height()) ){
+          //No resolution requested - pick the largest one
+          qDebug() << "Found Bigger Mode:" << sz << QSize(minfo.width, minfo.height);
+          sz = QSize(minfo.width, minfo.height);
+          det_mode = minfo.id;
+        }else if(!res.isNull()){
+          sz = QSize(minfo.width, minfo.height);
+          if(sz == res && minfo.dot_clock > refreshrate){ det_mode = minfo.id; refreshrate = minfo.dot_clock; }
+        }
       }
     }
     free(srreply);
@@ -197,12 +211,38 @@ bool OutputDevice::disable(){
 
 bool OutputDevice::enable(QRect geom){
   //if no geom provided, will add as the right-most screen at optimal resolution
-  if(this->isEnabled()){ return true; } //already enabled
+  //if(this->isEnabled()){ return true; } //already enabled
   qDebug() << "Enable Monitor:" << geom;
   xcb_randr_mode_t mode = modeForResolution(geom.size(), p_obj.modes);
   if(mode==XCB_NONE){ return false; } //invalid resolution for this monitor
+  //qDebug() << " - Found Mode:" << mode;
+  if(p_obj.crtc == 0){
+    //Need to scan for an available crtc to use (turning on a monitor for the first time)
+    xcb_randr_get_screen_resources_reply_t *reply = xcb_randr_get_screen_resources_reply(QX11Info::connection(),
+		xcb_randr_get_screen_resources_unchecked(QX11Info::connection(), QX11Info::appRootWindow()),
+		NULL);
+    int num = xcb_randr_get_screen_resources_crtcs_length(reply);
+    for(int i=0; i<num && p_obj.crtc==0; i++){
+      xcb_randr_crtc_t crt = xcb_randr_get_screen_resources_crtcs(reply)[i];
+      xcb_randr_get_crtc_info_reply_t *info = xcb_randr_get_crtc_info_reply(QX11Info::connection(),
+		xcb_randr_get_crtc_info_unchecked(QX11Info::connection(), crt, QX11Info::appTime()),
+		NULL);
+      //Verify that the output is supported by this crtc
+      QList<xcb_randr_output_t> possible;
+      if(xcb_randr_get_crtc_info_outputs_length(info) < 1){ //make sure it is not already associated with an output
+        int pnum = xcb_randr_get_crtc_info_possible_length(info);
+        for(int p=0; p<pnum; p++){ possible << xcb_randr_get_crtc_info_possible(info)[p]; }
+      }
+      if(possible.contains(p_obj.output)){ p_obj.crtc = crt; }
+      free(info);
+    }
+    free(reply);
+  }
+  //qDebug() << " - Using crtc:" << p_obj.crtc;
+  xcb_randr_output_t outList[1]{ p_obj.output };
+
   xcb_randr_set_crtc_config_cookie_t cookie = xcb_randr_set_crtc_config_unchecked(QX11Info::connection(), p_obj.crtc,
-		XCB_CURRENT_TIME, XCB_CURRENT_TIME, geom.x(), geom.y(), mode, XCB_RANDR_ROTATION_ROTATE_0, 1, &p_obj.output);
+		XCB_CURRENT_TIME, XCB_CURRENT_TIME, geom.x(), geom.y(), mode, XCB_RANDR_ROTATION_ROTATE_0, 1, outList);
     //Now check the result of the configuration
     xcb_randr_set_crtc_config_reply_t *reply = xcb_randr_set_crtc_config_reply(QX11Info::connection(), cookie, NULL);
     if(reply==0){ return false; }
@@ -229,6 +269,7 @@ void OutputDevice::updateInfoCache(){
 		NULL);
       //Compare names
       QString name = QString::fromLocal8Bit( (char*) xcb_randr_get_output_info_name(info), xcb_randr_get_output_info_name_length(info));
+      free(info);
       if(name == p_obj.name){ p_obj.output = output; break; }
     }
     free(reply);
@@ -273,12 +314,26 @@ QString OutputDeviceList::primaryMonitor(){
   return "";
 }
 
-void OutputDeviceList::disableMonitor(QString id){
+bool OutputDeviceList::disableMonitor(QString id){
+  bool ok = false;
+  for(int i=0; i<out_devs.length(); i++){
+    if(out_devs[i].ID() == id){
+        ok = out_devs[i].disable();
+        out_devs[i].updateInfoCache();
+      break;
+    }
+  }
+  return ok;
+}
+
+bool OutputDeviceList::enableMonitor(QString id, QRect geom){
+  bool ok = false;
   for(int i=0; i<out_devs.length(); i++){
     if(out_devs[i].ID() == id){
-        out_devs[i].disable();
+        ok = out_devs[i].enable(geom);
         out_devs[i].updateInfoCache();
       break;
     }
   }
+  return ok;
 }
diff --git a/src-qt5/core/libLumina/LuminaRandR.h b/src-qt5/core/libLumina/LuminaRandR.h
index 0e806ba5..fa2db63e 100644
--- a/src-qt5/core/libLumina/LuminaRandR.h
+++ b/src-qt5/core/libLumina/LuminaRandR.h
@@ -105,8 +105,8 @@ public:
 	void setPrimaryMonitor(QString id);
 	QString primaryMonitor();
 
-	void disableMonitor(QString id);
-	//void enableMonitor(QString id, QRect geom);
+	bool disableMonitor(QString id);
+	bool enableMonitor(QString id, QRect geom);
 
 };
 #endif
diff --git a/src-qt5/core/libLumina/test/main.cpp b/src-qt5/core/libLumina/test/main.cpp
index 8f809b24..547a1846 100644
--- a/src-qt5/core/libLumina/test/main.cpp
+++ b/src-qt5/core/libLumina/test/main.cpp
@@ -5,9 +5,14 @@
 
 
 int main(int argc, char** argv){
+  QString toggle = "HDMI-2";
+  QRect toggleGeom(1921,0, 1024,768); //put to the right of the default monitor
+  int toggleOK = -1; //-1: automatic, 0: enable monitor, 1: disable monitor
+
   QApplication A(argc, argv);
   qDebug() << "Load Monitor Device Information";
   OutputDeviceList devList;
+
   qDebug() << "Detected Information:";
   for(int i=0; i<devList.length(); i++){
     qDebug() << "["+devList.at(i)->ID()+"]";
@@ -19,11 +24,19 @@ int main(int argc, char** argv){
       qDebug() << "  - Physical Size (mm):" << devList.at(i)->physicalSizeMM();
       qDebug() << "  - Current DPI:" << devList.at(i)->physicalDPI();
       qDebug() << "  - Available Resolutions:" << devList.at(i)->availableResolutions();
+      if(devList.at(i)->ID() == toggle && toggleOK<0){ toggleOK = (devList.at(i)->isEnabled() ? 1 : 0); }
     }
   }
-  /*QString disable = "HDMI-2";
-  qDebug() << "Try Disabling Monitor:" << disable;
-  devList.disableMonitor(disable);*/
+  qDebug() << "\n================\n";
+  if(toggleOK == 0){
+    qDebug() << "Try Enabling Monitor:" << toggle << toggleGeom;
+    bool ok = devList.enableMonitor(toggle, toggleGeom);
+    qDebug() << " -- Success:" << ok;
+  }else if(toggleOK == 1){
+    qDebug() << "Try Disabling Monitor:" << toggle;
+    bool ok = devList.disableMonitor(toggle);
+    qDebug() << " -- Success:" << ok;
+  }
 
   /*QString setprimary = "eDP-1";
   if(devList.primaryMonitor() != setprimary){
-- 
cgit