[WIN32SS] Introduce the MDEVOBJ structure

This will be used (later) to store the list of all enabled display devices.

Add a global variable gpmdev (should really be stored in DISPLAYINFO structure)
Replace global variable gppdevPrimary by pmdev->ppdevGlobal.

win32ss/CMakeLists.txt

@@ -73,6 +73,7 @@ list(APPEND SOURCE
     gdi/eng/ldevobj.c
     gdi/eng/mapping.c
     gdi/eng/math.c
+    gdi/eng/mdevobj.c
     gdi/eng/mem.c
     gdi/eng/engmisc.c
     gdi/eng/mouse.c

win32ss/gdi/eng/device.c

@@ -198,7 +198,7 @@ VideoPortCallout(
             if (CallbackParams->Param == TRUE)
             {
                 /* Re-enable the display */
-                UserRefreshDisplay(gppdevPrimary);
+                UserRefreshDisplay(gpmdev->ppdevGlobal);
             }
             else
             {

win32ss/gdi/eng/engbrush.c

@@ -324,7 +324,7 @@ EBRUSHOBJ_bRealizeBrush(EBRUSHOBJ *pebo, BOOL bCallDriver)
 
     ppdev = (PPDEVOBJ)pebo->psurfTrg->SurfObj.hdev;
     if (!ppdev)
-        ppdev = gppdevPrimary;
+        ppdev = gpmdev->ppdevGlobal;
 
     if (bCallDriver)
     {
@@ -458,7 +458,7 @@ EBRUSHOBJ_psoMask(EBRUSHOBJ *pebo)
             /* Get the PDEV */
             ppdev = (PPDEVOBJ)pebo->psurfTrg->SurfObj.hdev;
             if (!ppdev)
-                ppdev = gppdevPrimary;
+                ppdev = gpmdev->ppdevGlobal;
 
             /* Use the hatch bitmap as the mask */
             hbmMask = (HBITMAP)ppdev->ahsurf[pebo->pbrush->iHatch];

win32ss/gdi/eng/mdevobj.c

@@ -0,0 +1,13 @@
+/*
+ * COPYRIGHT:        See COPYING in the top level directory
+ * PROJECT:          ReactOS kernel
+ * PURPOSE:          Support for meta devices
+ * FILE:             win32ss/gdi/eng/mdevobj.c
+ * PROGRAMER:        Hervé Poussineau
+ */
+
+#include <win32k.h>
+#define NDEBUG
+#include <debug.h>
+
+PMDEVOBJ gpmdev = NULL; /* FIXME: should be stored in gpDispInfo->pmdev */

win32ss/gdi/eng/mdevobj.h

@@ -0,0 +1,17 @@
+#ifndef __WIN32K_MDEVOBJ_H
+#define __WIN32K_MDEVOBJ_H
+
+/* Type definitions ***********************************************************/
+
+typedef struct _PDEVOBJ *PPDEVOBJ;
+
+typedef struct _MDEVOBJ
+{
+    PPDEVOBJ ppdevGlobal;
+} MDEVOBJ, *PMDEVOBJ;
+
+/* Globals ********************************************************************/
+
+extern PMDEVOBJ gpmdev; /* FIXME: should be stored in gpDispInfo->pmdev */
+
+#endif /* !__WIN32K_MDEVOBJ_H */

win32ss/gdi/eng/pdevobj.c

@@ -11,8 +11,6 @@
 #include <debug.h>
 DBG_DEFAULT_CHANNEL(EngPDev);
 
-PPDEVOBJ gppdevPrimary = NULL;
-
 static PPDEVOBJ gppdevList = NULL;
 static HSEMAPHORE ghsemPDEV;
 
@@ -150,8 +148,8 @@ PDEVOBJ_vRelease(
         }
 
         /* Is this the primary one ? */
-        if (ppdev == gppdevPrimary)
-            gppdevPrimary = NULL;
+        if (ppdev == gpmdev->ppdevGlobal)
+            gpmdev->ppdevGlobal = NULL;
 
         /* Unload display driver */
         EngUnloadImage(ppdev->pldev);
@@ -615,7 +613,7 @@ PDEVOBJ_bSwitchMode(
     PDEVOBJ_vRelease(ppdevTmp);
 
     /* Update primary display capabilities */
-    if (ppdev == gppdevPrimary)
+    if (ppdev == gpmdev->ppdevGlobal)
     {
         PDEVOBJ_vGetDeviceCaps(ppdev, &GdiHandleTable->DevCaps);
     }
@@ -669,10 +667,10 @@ EngpGetPDEV(
             }
         }
     }
-    else
+    else if (gpmdev)
     {
         /* Otherwise use the primary PDEV */
-        ppdev = gppdevPrimary;
+        ppdev = gpmdev->ppdevGlobal;
     }
 
     /* Did we find one? */
@@ -695,9 +693,9 @@ EngpGetPDEV(
         if (ppdev)
         {
             /* Set as primary PDEV, if we don't have one yet */
-            if (!gppdevPrimary)
+            if (!gpmdev->ppdevGlobal)
             {
-                gppdevPrimary = ppdev;
+                gpmdev->ppdevGlobal = ppdev;
                 ppdev->pGraphicsDevice->StateFlags |= DISPLAY_DEVICE_PRIMARY_DEVICE;
             }
         }

win32ss/gdi/eng/pdevobj.h

@@ -150,11 +150,6 @@ typedef struct _PDEVOBJ
     struct _EDD_DIRECTDRAW_GLOBAL * pEDDgpl;
 } PDEVOBJ, *PPDEVOBJ;
 
-/* Globals ********************************************************************/
-
-extern PPDEVOBJ gppdevPrimary;
-
-
 /* Function prototypes ********************************************************/
 
 PPDEVOBJ

win32ss/gdi/ntgdi/dclife.c

@@ -144,7 +144,7 @@ DC_vInitDc(
     pdc->pdcattr = &pdc->dcattr;
     pdc->dcattr.pvLDC = NULL;
     pdc->dcattr.ulDirty_ = DIRTY_DEFAULT;
-    if (ppdev == gppdevPrimary)
+    if (ppdev == gpmdev->ppdevGlobal)
         pdc->dcattr.ulDirty_ |= DC_PRIMARY_DISPLAY;
 
     /* Setup the DC size */

win32ss/gdi/ntgdi/device.c

@@ -29,13 +29,13 @@ BOOL FASTCALL
 IntCreatePrimarySurface(VOID)
 {
     /* Create surface */
-    PDEVOBJ_pSurface(gppdevPrimary);
+    PDEVOBJ_pSurface(gpmdev->ppdevGlobal);
 
-    DPRINT("IntCreatePrimarySurface, gppdevPrimary=%p, gppdevPrimary->pSurface = %p\n",
-        gppdevPrimary, gppdevPrimary->pSurface);
+    DPRINT("IntCreatePrimarySurface, ppdevGlobal=%p, ppdevGlobal->pSurface = %p\n",
+        gpmdev->ppdevGlobal, gpmdev->ppdevGlobal->pSurface);
 
     // Init Primary Displays Device Capabilities.
-    PDEVOBJ_vGetDeviceCaps(gppdevPrimary, &GdiHandleTable->DevCaps);
+    PDEVOBJ_vGetDeviceCaps(gpmdev->ppdevGlobal, &GdiHandleTable->DevCaps);
 
     return TRUE;
 }
@@ -51,7 +51,7 @@ IntEnumHDev(VOID)
 {
 // I guess we will soon have more than one primary surface.
 // This will do for now.
-    return gppdevPrimary;
+    return gpmdev->ppdevGlobal;
 }
 
 

win32ss/gdi/ntgdi/gdidbg.c

@@ -32,6 +32,7 @@ DBG_CHANNEL DbgChannels[DbgChCount] = {
     {L"EngLDev", DbgChEngLDev},
     {L"EngLine", DbgChEngLine},
     {L"EngMapping", DbgChEngMapping},
+    {L"EngMDev", DbgChEngMDev},
     {L"EngPDev", DbgChEngPDev},
     {L"EngSurface", DbgChEngSurface},
     {L"EngWnd", DbgChEngWnd},

win32ss/user/ntuser/metric.c

@@ -47,16 +47,16 @@ InitMetrics(VOID)
         ZwClose(hKey);
     }
 
-    /* FIXME: HACK, due to missing PDEV on first init */
-    if (!gppdevPrimary)
+    /* FIXME: HACK, due to missing MDEV on first init */
+    if (!gpmdev)
     {
         Width = 640;
         Height = 480;
     }
     else
     {
-        Width = gppdevPrimary->gdiinfo.ulHorzRes;
-        Height = gppdevPrimary->gdiinfo.ulVertRes;
+        Width = gpmdev->ppdevGlobal->gdiinfo.ulHorzRes;
+        Height = gpmdev->ppdevGlobal->gdiinfo.ulVertRes;
     }
 
     /* Screen sizes */

win32ss/user/ntuser/tags.h

@@ -71,6 +71,7 @@
 #define GDITAG_DC_FREELIST               'fcdG'
 #define GDITAG_DWMSTATE                  'scDG'
 #define GDITAG_DEVMODE                   'vedG'
+#define GDITAG_MDEV                      'vdmG'
 #define GDITAG_PDEV                      'veDG'
 #define GDITAG_HGLYPH_ARRAY              'mfdG'
 #define GDITAG_DRVSUP                    'srdG'

win32ss/user/ntuser/win32kdebug.h

@@ -53,6 +53,7 @@
         DbgChEngLDev,
         DbgChEngLine,
         DbgChEngMapping,
+        DbgChEngMDev,
         DbgChEngPDev,
         DbgChEngSurface,
         DbgChEngWnd,

win32ss/user/ntuser/winsta.c

@@ -263,6 +263,13 @@ co_IntInitializeDesktopGraphics(VOID)
     UNICODE_STRING DriverName = RTL_CONSTANT_STRING(L"DISPLAY");
     PDESKTOP pdesk;
 
+    gpmdev = ExAllocatePoolZero(PagedPool, sizeof(MDEVOBJ), GDITAG_MDEV);
+    if (!gpmdev)
+    {
+        ERR("Failed to allocate MDEV.\n");
+        return FALSE;
+    }
+
     ScreenDeviceContext = IntGdiCreateDC(&DriverName, NULL, NULL, NULL, FALSE);
     if (NULL == ScreenDeviceContext)
     {
@@ -285,11 +292,11 @@ co_IntInitializeDesktopGraphics(VOID)
     InitMetrics();
 
     /* Set new size of the monitor */
-    UserUpdateMonitorSize((HDEV)gppdevPrimary);
+    UserUpdateMonitorSize((HDEV)gpmdev->ppdevGlobal);
 
     /* Update the SERVERINFO */
-    gpsi->aiSysMet[SM_CXSCREEN] = gppdevPrimary->gdiinfo.ulHorzRes;
-    gpsi->aiSysMet[SM_CYSCREEN] = gppdevPrimary->gdiinfo.ulVertRes;
+    gpsi->aiSysMet[SM_CXSCREEN] = gpmdev->ppdevGlobal->gdiinfo.ulHorzRes;
+    gpsi->aiSysMet[SM_CYSCREEN] = gpmdev->ppdevGlobal->gdiinfo.ulVertRes;
     gpsi->Planes        = NtGdiGetDeviceCaps(ScreenDeviceContext, PLANES);
     gpsi->BitsPixel     = NtGdiGetDeviceCaps(ScreenDeviceContext, BITSPIXEL);
     gpsi->BitCount      = gpsi->Planes * gpsi->BitsPixel;
@@ -311,7 +318,7 @@ co_IntInitializeDesktopGraphics(VOID)
     gpsi->ptCursor.y = gpsi->aiSysMet[SM_CYSCREEN] / 2;
 
     /* Attach monitor */
-    UserAttachMonitor((HDEV)gppdevPrimary);
+    UserAttachMonitor((HDEV)gpmdev->ppdevGlobal);
 
     /* Setup the cursor */
     co_IntLoadDefaultCursors();

win32ss/win32kp.h

@@ -23,6 +23,7 @@ typedef struct _DC *PDC;
 #include "gdi/ntgdi/gdiobj.h"
 #include "gdi/ntgdi/palette.h"
 #include "gdi/eng/surface.h"
+#include "gdi/eng/mdevobj.h"
 #include "gdi/eng/pdevobj.h"
 #include "gdi/eng/ldevobj.h"
 #include "gdi/eng/device.h"