XQuartz: RandR: Capture the display when switching modes with RandR

This will prevent native windows from resizing as we change resolutions.

Signed-off-by: Jeremy Huddleston <jeremyhu@apple.com>

5 files changed, 23 insertions, 0 deletions

diff --git a/hw/xquartz/quartz.c b/hw/xquartz/quartz.c
index 222a5eab0..11e5a74d7 100644
--- a/hw/xquartz/quartz.c
+++ b/hw/xquartz/quartz.c
@@ -82,6 +82,8 @@ Bool XQuartzIsRootless = TRUE;
 Bool XQuartzServerVisible = FALSE;
 Bool XQuartzFullscreenMenu = FALSE;
 
+int32_t XQuartzShieldingWindowLevel = 0;
+
 /*
 ===========================================================================
 
diff --git a/hw/xquartz/quartz.h b/hw/xquartz/quartz.h
index b83391db9..67a7919b2 100644
--- a/hw/xquartz/quartz.h
+++ b/hw/xquartz/quartz.h
@@ -124,6 +124,8 @@ extern Bool XQuartzFullscreenMenu;   /* Show the menu bar (autohide) while in FS
 extern Bool XQuartzFullscreenDisableHotkeys;
 extern Bool XQuartzOptionSendsAlt;   /* Alt or Mode_switch? */
 
+extern int32_t XQuartzShieldingWindowLevel; /* CGShieldingWindowLevel() or 0 */
+
 Bool QuartzAddScreen(int index, ScreenPtr pScreen);
 Bool QuartzSetupScreen(int index, ScreenPtr pScreen);
 void QuartzInitOutput(int argc,char **argv);
diff --git a/hw/xquartz/quartzRandR.c b/hw/xquartz/quartzRandR.c
index 296f9b669..57e975550 100644
--- a/hw/xquartz/quartzRandR.c
+++ b/hw/xquartz/quartzRandR.c
@@ -346,6 +346,14 @@ static int QuartzRandRRegisterModeCallback (ScreenPtr pScreen,
 static Bool QuartzRandRSetMode(ScreenPtr pScreen, QuartzModeInfoPtr pMode, BOOL doRegister) {
     QuartzScreenPtr pQuartzScreen = QUARTZ_PRIV(pScreen);
     CGDirectDisplayID screenId = pQuartzScreen->displayIDs[0];
+    Bool captureDisplay = (pMode->refresh != FAKE_REFRESH_FULLSCREEN && pMode->refresh != FAKE_REFRESH_ROOTLESS);
+
+    if(XQuartzShieldingWindowLevel == 0 && captureDisplay) {
+        CGCaptureAllDisplays();
+        XQuartzShieldingWindowLevel = CGShieldingWindowLevel(); // 2147483630
+        DEBUG_LOG("Display captured.  ShieldWindowID: %u, Shield level: %d\n",
+                  CGShieldingWindowID(screenId), XQuartzShieldingWindowLevel);
+    }
 
     if (pQuartzScreen->currentMode.ref && CFEqual(pMode->ref, pQuartzScreen->currentMode.ref)) {
         DEBUG_LOG("Requested RandR resolution matches current CG mode\n");
@@ -369,6 +377,11 @@ static Bool QuartzRandRSetMode(ScreenPtr pScreen, QuartzModeInfoPtr pMode, BOOL
     pQuartzScreen->currentMode = *pMode;
     CFRetain(pQuartzScreen->currentMode.ref);
     
+    if(XQuartzShieldingWindowLevel != 0 && !captureDisplay) {
+        CGReleaseAllDisplays();
+        XQuartzShieldingWindowLevel = 0;
+    }
+
     return TRUE;
 }
 
diff --git a/hw/xquartz/xpr/xprAppleWM.c b/hw/xquartz/xpr/xprAppleWM.c
index 1a3d427b7..21e6f98fa 100644
--- a/hw/xquartz/xpr/xprAppleWM.c
+++ b/hw/xquartz/xpr/xprAppleWM.c
@@ -69,6 +69,8 @@ static int xprSetWindowLevel(
     
     if(XQuartzIsRootless)
         wc.window_level = normal_window_levels[level];
+    else if(XQuartzShieldingWindowLevel)
+        wc.window_level = XQuartzShieldingWindowLevel + 1;
     else
         wc.window_level = rooted_window_levels[level];
     
diff --git a/hw/xquartz/xpr/xprFrame.c b/hw/xquartz/xpr/xprFrame.c
index 8ee3a28a6..15598e942 100644
--- a/hw/xquartz/xpr/xprFrame.c
+++ b/hw/xquartz/xpr/xprFrame.c
@@ -173,6 +173,8 @@ xprCreateFrame(RootlessWindowPtr pFrame, ScreenPtr pScreen,
 
     if(XQuartzIsRootless)
         wc.window_level = normal_window_levels[pFrame->level];
+    else if(XQuartzShieldingWindowLevel)
+        wc.window_level = XQuartzShieldingWindowLevel + 1;
     else
         wc.window_level = rooted_window_levels[pFrame->level];
     mask |= XP_WINDOW_LEVEL;
@@ -287,6 +289,8 @@ static void xprRestackFrame(RootlessFrameID wid, RootlessFrameID nextWid) {
         if(winRec) {
             if(XQuartzIsRootless)
                 wc.window_level = normal_window_levels[winRec->level];
+            else if(XQuartzShieldingWindowLevel)
+                wc.window_level = XQuartzShieldingWindowLevel + 1;
             else
                 wc.window_level = rooted_window_levels[winRec->level];
             mask |= XP_WINDOW_LEVEL;