XQuartz: RandR: Respond better to resolution changes made outside X

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

5 files changed, 135 insertions, 93 deletions

diff --git a/hw/xquartz/darwinEvents.c b/hw/xquartz/darwinEvents.c
index 7b34b8a05..736706817 100644
--- a/hw/xquartz/darwinEvents.c
+++ b/hw/xquartz/darwinEvents.c
@@ -52,6 +52,7 @@ in this Software without prior written authorization from The Open Group.
 #include "darwin.h"
 #include "quartz.h"
 #include "quartzKeyboard.h"
+#include "quartzRandR.h"
 #include "darwinEvents.h"
 
 #include <sys/types.h>
@@ -276,7 +277,12 @@ static void DarwinEventHandler(int screenNum, InternalEvent *ie, DeviceIntPtr de
             break;
             
         case kXquartzDisplayChanged:
+            DEBUG_LOG("kXquartzDisplayChanged\n");
             QuartzUpdateScreens();
+#ifdef RANDR
+            /* Update our RandR info */
+            QuartzRandRUpdateFakeModes(TRUE);
+#endif
             break;
             
         default:
diff --git a/hw/xquartz/quartzCommon.h b/hw/xquartz/quartzCommon.h
index 851e74c43..718df4b88 100644
--- a/hw/xquartz/quartzCommon.h
+++ b/hw/xquartz/quartzCommon.h
@@ -38,29 +38,6 @@
 #include <X11/Xdefs.h>
 #include "privates.h"
 
-typedef struct {
-    size_t width, height;
-    int refresh;
-    const void *ref;
-} QuartzModeInfo, *QuartzModeInfoPtr;
-
-// Quartz specific per screen storage structure
-typedef struct {
-    // List of CoreGraphics displays that this X11 screen covers.
-    // This is more than one CG display for video mirroring and
-    // rootless PseudoramiX mode.
-    // No CG display will be covered by more than one X11 screen.
-    int displayCount;
-    CGDirectDisplayID *displayIDs;
-    QuartzModeInfo originalMode, fakeMode;
-} QuartzScreenRec, *QuartzScreenPtr;
-
-#define QUARTZ_PRIV(pScreen) \
-    ((QuartzScreenPtr)dixLookupPrivate(&pScreen->devPrivates, quartzScreenKey))
-
-void QuartzCopyDisplayIDs(ScreenPtr pScreen,
-                          int displayCount, CGDirectDisplayID *displayIDs);
-
 // User preferences used by Quartz modes
 extern int              quartzUseSysBeep;
 extern int              quartzFullscreenDisableHotkeys;
diff --git a/hw/xquartz/quartzRandR.c b/hw/xquartz/quartzRandR.c
index e46e90405..65dce22a5 100644
--- a/hw/xquartz/quartzRandR.c
+++ b/hw/xquartz/quartzRandR.c
@@ -38,6 +38,7 @@
 #include "quartzCommon.h"
 #include "quartzRandR.h"
 #include "quartz.h"
+#include "darwin.h"
 
 #include <AvailabilityMacros.h>
 
@@ -45,6 +46,13 @@
 #include <randrstr.h>
 #include <IOKit/graphics/IOGraphicsTypes.h>
 
+/* TODO: UGLY, find a better way!
+ * We want to ignore kXquartzDisplayChanged which are generated by us
+ */
+static Bool ignore_next_fake_mode_update = FALSE;
+
+#define FAKE_REFRESH_ROOTLESS 1
+#define FAKE_REFRESH_FULLSCREEN 2
 
 #define DEFAULT_REFRESH  60
 #define kDisplayModeUsableFlags  (kDisplayModeValidFlag | kDisplayModeSafeFlag)
@@ -171,8 +179,7 @@ static Bool QuartzRandRSetMode (CGDirectDisplayID screenId,
     if (!modeRef)
         return FALSE;
 
-    return (CGDisplaySetDisplayMode(screenId, modeRef, NULL) !=
-            kCGErrorSuccess);
+    return (CGDisplaySetDisplayMode(screenId, modeRef, NULL) != kCGErrorSuccess);
 }
 
 static Bool QuartzRandREnumerateModes (ScreenPtr pScreen,
@@ -227,18 +234,15 @@ static Bool QuartzRandREnumerateModes (ScreenPtr pScreen,
 
 static Bool QuartzRandRModesEqual (QuartzModeInfoPtr pMode1,
                                    QuartzModeInfoPtr pMode2) {
-    if (pMode1->width != pMode2->width)
-        return FALSE;
-    if (pMode1->height != pMode2->height)
-        return FALSE;
-    if (pMode1->refresh != pMode2->refresh)
-        return FALSE;
-    return TRUE;
+    return (pMode1->width == pMode2->width) &&
+           (pMode1->height == pMode2->height) &&
+           (pMode1->refresh == pMode2->refresh);
 }
 
 static Bool QuartzRandRRegisterMode (ScreenPtr pScreen,
-                                     QuartzModeInfoPtr pMode,
-                                     Bool isCurrentMode) {
+                                     QuartzModeInfoPtr pMode) {
+    QuartzScreenPtr pQuartzScreen = QUARTZ_PRIV(pScreen);
+    Bool isCurrentMode = QuartzRandRModesEqual(&pQuartzScreen->currentMode, pMode);
     RRScreenSizePtr pSize = RRRegisterSize(pScreen,
         pMode->width, pMode->height, pScreen->mmWidth, pScreen->mmHeight);
     if (pSize) {
@@ -252,14 +256,11 @@ static Bool QuartzRandRRegisterMode (ScreenPtr pScreen,
     return FALSE;
 }
 
-static Bool QuartzRandRGetModeCallback (ScreenPtr pScreen,
+static Bool QuartzRandRRegisterModeCallback (ScreenPtr pScreen,
                                         CGDirectDisplayID screenId,
                                         QuartzModeInfoPtr pMode,
-                                        void *data) {
-    QuartzModeInfoPtr pCurMode = (QuartzModeInfoPtr) data;
-
-    return QuartzRandRRegisterMode(pScreen, pMode,
-        QuartzRandRModesEqual(pMode, pCurMode));
+                                        void *data __unused) {
+    return QuartzRandRRegisterMode(pScreen, pMode);
 }
 
 static Bool QuartzRandRSetModeCallback (ScreenPtr pScreen,
@@ -267,73 +268,64 @@ static Bool QuartzRandRSetModeCallback (ScreenPtr pScreen,
                                         QuartzModeInfoPtr pMode,
                                         void *data) {
     QuartzModeInfoPtr pReqMode = (QuartzModeInfoPtr) data;
+    QuartzScreenPtr pQuartzScreen = QUARTZ_PRIV(pScreen);
 
     if (!QuartzRandRModesEqual(pMode, pReqMode))
         return TRUE;  /* continue enumeration */
 
-    return QuartzRandRSetMode(screenId, pMode);
+    if (pReqMode->ref == pQuartzScreen->currentMode.ref) {
+        DEBUG_LOG("Requested RandR resolution matches current CG mode\n");
+        return FALSE; /* We don't need to do anything in CG */
+    }
+
+    if (QuartzRandRSetMode(screenId, pMode) == FALSE) {
+        ignore_next_fake_mode_update = TRUE;
+        return FALSE;
+    } else {
+        return TRUE;
+    };
 }
 
 static Bool QuartzRandRGetInfo (ScreenPtr pScreen, Rotation *rotations) {
     QuartzScreenPtr pQuartzScreen = QUARTZ_PRIV(pScreen);
     CGDirectDisplayID screenId;
-    QuartzModeInfo curMode;
 
     *rotations = RR_Rotate_0;  /* TODO: support rotation */
 
     if (pQuartzScreen->displayCount == 0)
         return FALSE;
+
+    QuartzRandRRegisterMode(pScreen, &pQuartzScreen->rootlessMode);
+    QuartzRandRRegisterMode(pScreen, &pQuartzScreen->fullScreenMode);
+
     if (pQuartzScreen->displayCount > 1) {
         /* RandR operations are not well-defined for an X11 screen spanning
            multiple CG displays. Create two entries for the current virtual
            resolution including/excluding the menu bar. */
-        QuartzRandRRegisterMode(pScreen, &pQuartzScreen->fakeMode,
-            !quartzHasRoot);
-        QuartzRandRRegisterMode(pScreen, &pQuartzScreen->originalMode,
-            quartzHasRoot);
         return TRUE;
     }
     screenId = pQuartzScreen->displayIDs[0];
 
-    if (!QuartzRandRGetCurrentModeInfo(screenId, &curMode))
-        return FALSE;
-
-    /* Add a fake mode corresponding to the original resolution excluding the
-       height of the menu bar. */
-    if (!quartzHasRoot &&
-        QuartzRandRModesEqual(&pQuartzScreen->originalMode, &curMode)) {
-        QuartzRandRRegisterMode(pScreen, &pQuartzScreen->fakeMode, TRUE);
-        curMode = pQuartzScreen->fakeMode;
-    }
-    else
-        QuartzRandRRegisterMode(pScreen, &pQuartzScreen->fakeMode, FALSE);
-
-    return QuartzRandREnumerateModes(pScreen, screenId,
-        QuartzRandRGetModeCallback, &curMode);
+    return QuartzRandREnumerateModes(pScreen, screenId, QuartzRandRRegisterModeCallback, NULL);
 }
 
 static Bool QuartzRandRSetConfig (ScreenPtr           pScreen,
-			          Rotation            randr,
-			          int                 rate,
-			          RRScreenSizePtr     pSize) {
+                                  Rotation            randr,
+                                  int                 rate,
+                                  RRScreenSizePtr     pSize) {
     QuartzScreenPtr pQuartzScreen = QUARTZ_PRIV(pScreen);
     CGDirectDisplayID screenId;
-    QuartzModeInfo reqMode, curMode;
-    Bool rootless = FALSE;
+    QuartzModeInfo reqMode;
 
     reqMode.width = pSize->width;
     reqMode.height = pSize->height;
     reqMode.refresh = rate;
 
-    /* If the client requested the fake screen mode, switch to rootless mode.
-       Switch to fullscreen mode (root window visible) if a real screen mode was
-       requested. */
-    if (QuartzRandRModesEqual(&reqMode, &pQuartzScreen->fakeMode)) {
-        rootless = TRUE;
-        reqMode = pQuartzScreen->originalMode;
-    }
-    QuartzSetFullscreen(!rootless);
-    QuartzSetRootless(rootless);
+    /* If the client requested the fake rootless mode, switch to rootless.
+     * Otherwise, force fullscreen mode.
+     */
+    QuartzSetFullscreen(reqMode.refresh != FAKE_REFRESH_ROOTLESS);
+    QuartzSetRootless(reqMode.refresh == FAKE_REFRESH_ROOTLESS);
 
     if (pQuartzScreen->displayCount == 0)
         return FALSE;
@@ -341,38 +333,80 @@ static Bool QuartzRandRSetConfig (ScreenPtr           pScreen,
         /* RandR operations are not well-defined for an X11 screen spanning
            multiple CG displays. Do not accept any configuations that differ
            from the current configuration. */
-        return QuartzRandRModesEqual(&reqMode, &pQuartzScreen->originalMode);
+        return TRUE;
     }
-    screenId = pQuartzScreen->displayIDs[0];
 
     /* Do not switch modes if requested mode is equal to current mode. */
-    if (!QuartzRandRGetCurrentModeInfo(screenId, &curMode))
-        return FALSE;
-    if (QuartzRandRModesEqual(&reqMode, &curMode))
+    if (QuartzRandRModesEqual(&reqMode, &pQuartzScreen->currentMode))
         return TRUE;
+        
+    screenId = pQuartzScreen->displayIDs[0];
+    if (QuartzRandREnumerateModes(pScreen, screenId, QuartzRandRSetModeCallback, &reqMode)) {
+        pQuartzScreen->currentMode = reqMode;
+        return TRUE;
+    }
+    
+    DEBUG_LOG("Unable to find a matching config: %d x %d @ %d\n", (int)reqMode.width, (int)reqMode.height, (int)reqMode.refresh);
 
-    return QuartzRandREnumerateModes(pScreen, screenId,
-        QuartzRandRSetModeCallback, &reqMode);
+    return FALSE;
 }
 
-Bool QuartzRandRInit (ScreenPtr pScreen) {
-    rrScrPrivPtr    pScrPriv;
+static Bool _QuartzRandRUpdateFakeModes (ScreenPtr pScreen) {
     QuartzScreenPtr pQuartzScreen = QUARTZ_PRIV(pScreen);
-    
-    if (!RRScreenInit (pScreen)) return FALSE;
 
     if (pQuartzScreen->displayCount == 1) {
         if (!QuartzRandRGetCurrentModeInfo(pQuartzScreen->displayIDs[0],
-                                           &pQuartzScreen->originalMode))
+                                           &pQuartzScreen->fullScreenMode))
             return FALSE;
+    } else {
+        pQuartzScreen->fullScreenMode.width = pScreen->width;
+        pQuartzScreen->fullScreenMode.height = pScreen->height;
+        if(quartzEnableRootless)
+            pQuartzScreen->fullScreenMode.height += aquaMenuBarHeight;
     }
-    else {
-        pQuartzScreen->originalMode.width = pScreen->width;
-        pQuartzScreen->originalMode.height = pScreen->height;
-        pQuartzScreen->originalMode.refresh = DEFAULT_REFRESH;
+
+    pQuartzScreen->fullScreenMode.refresh = FAKE_REFRESH_FULLSCREEN;
+
+    pQuartzScreen->rootlessMode = pQuartzScreen->fullScreenMode;
+    pQuartzScreen->rootlessMode.refresh = FAKE_REFRESH_ROOTLESS;
+    pQuartzScreen->rootlessMode.height -= aquaMenuBarHeight;
+
+    if(quartzEnableRootless) {
+        pQuartzScreen->currentMode = pQuartzScreen->rootlessMode;
+    } else {
+        pQuartzScreen->currentMode = pQuartzScreen->fullScreenMode;
     }
-    pQuartzScreen->fakeMode = pQuartzScreen->originalMode;
-    pQuartzScreen->fakeMode.height -= aquaMenuBarHeight;
+    
+    DEBUG_LOG("rootlessMode: %d x %d\n", (int)pQuartzScreen->rootlessMode.width, (int)pQuartzScreen->rootlessMode.height);
+    DEBUG_LOG("fullScreenMode: %d x %d\n", (int)pQuartzScreen->fullScreenMode.width, (int)pQuartzScreen->fullScreenMode.height);
+    DEBUG_LOG("currentMode: %d x %d\n", (int)pQuartzScreen->currentMode.width, (int)pQuartzScreen->currentMode.height);
+    
+    return TRUE;
+}
+
+Bool QuartzRandRUpdateFakeModes (BOOL force_update) {
+    ScreenPtr pScreen = screenInfo.screens[0];
+    
+    if(ignore_next_fake_mode_update) {
+        DEBUG_LOG("Ignoring update request caused by RandR resolution change.\n");
+        ignore_next_fake_mode_update = FALSE;
+        return TRUE;
+    }
+    
+    if(!_QuartzRandRUpdateFakeModes(pScreen))
+        return FALSE;
+    
+    if(force_update)
+        RRGetInfo(pScreen, TRUE);
+
+    return TRUE;
+}
+
+Bool QuartzRandRInit (ScreenPtr pScreen) {
+    rrScrPrivPtr    pScrPriv;
+    
+    if (!RRScreenInit (pScreen)) return FALSE;
+    if (!_QuartzRandRUpdateFakeModes (pScreen)) return FALSE;
 
     pScrPriv = rrGetScrPriv(pScreen);
     pScrPriv->rrGetInfo = QuartzRandRGetInfo;
diff --git a/hw/xquartz/quartzRandR.h b/hw/xquartz/quartzRandR.h
index d57dc3bf8..8ee2818e3 100644
--- a/hw/xquartz/quartzRandR.h
+++ b/hw/xquartz/quartzRandR.h
@@ -31,6 +31,30 @@
 #ifndef _QUARTZRANDR_H_
 #define _QUARTZRANDR_H_
 
+typedef struct {
+    size_t width, height;
+    int refresh;
+    const void *ref;
+} QuartzModeInfo, *QuartzModeInfoPtr;
+
+// Quartz specific per screen storage structure
+typedef struct {
+    // List of CoreGraphics displays that this X11 screen covers.
+    // This is more than one CG display for video mirroring and
+    // rootless PseudoramiX mode.
+    // No CG display will be covered by more than one X11 screen.
+    int displayCount;
+    CGDirectDisplayID *displayIDs;
+    QuartzModeInfo rootlessMode, fullScreenMode, currentMode;
+} QuartzScreenRec, *QuartzScreenPtr;
+
+#define QUARTZ_PRIV(pScreen) \
+    ((QuartzScreenPtr)dixLookupPrivate(&pScreen->devPrivates, quartzScreenKey))
+
+void QuartzCopyDisplayIDs(ScreenPtr pScreen,
+                          int displayCount, CGDirectDisplayID *displayIDs);
+
+Bool QuartzRandRUpdateFakeModes (BOOL force_update);
 Bool QuartzRandRInit (ScreenPtr pScreen);
 
 #endif
diff --git a/hw/xquartz/xpr/xprScreen.c b/hw/xquartz/xpr/xprScreen.c
index 4df0373ba..f7c8642d4 100644
--- a/hw/xquartz/xpr/xprScreen.c
+++ b/hw/xquartz/xpr/xprScreen.c
@@ -36,6 +36,7 @@
 #include "quartzCommon.h"
 #include "inputstr.h"
 #include "quartz.h"
+#include "quartzRandR.h"
 #include "xpr.h"
 #include "xprEvent.h"
 #include "pseudoramiX.h"