From: jimtabor <james.tabor@reactos.org>
Date: Thu, 30 May 2019 21:36:33 +0000 (-0500)
Subject: [NtGDI] Support Clipboard Metafile
X-Git-Tag: 0.4.14-dev~924
X-Git-Url: https://git.reactos.org/?p=reactos.git;a=commitdiff_plain;h=268b21c2f919baf5d0318bdb02d796532e653439;hp=e229b3eea7284aac94a21d810157a4a192777c25

[NtGDI] Support Clipboard Metafile

Fuctions that help transfer meta file data from one process to the next.
See CORE-12143.
---

diff --git a/win32ss/gdi/ntgdi/metafile.c b/win32ss/gdi/ntgdi/metafile.c
index 4bdf5745838..63d5a241d60 100644
--- a/win32ss/gdi/ntgdi/metafile.c
+++ b/win32ss/gdi/ntgdi/metafile.c
@@ -2,7 +2,7 @@
  * PROJECT:         ReactOS Win32k Subsystem
  * LICENSE:         GPL - See COPYING in the top level directory
  * FILE:            win32ss/gdi/ntgdi/metafile.c
- * PURPOSE:         Metafile Implementation
+ * PURPOSE:         Metafile Implementations, Metafile Clipboard Data Xfers
  * PROGRAMMERS:     ...
  */
 
@@ -13,20 +13,37 @@
 #define NDEBUG
 #include <debug.h>
 
-/* System Service Calls ******************************************************/
+// Need to move this to NtGdiTyp.h
+#define GDITAG_TYPE_EMF 'XEFM' // EnhMetaFile
+#define GDITAG_TYPE_MFP '_PFM' // MetaFile Picture
 
-/*
- * @unimplemented
- */
-LONG
-APIENTRY
-NtGdiConvertMetafileRect(IN HDC hDC,
-                         IN OUT PRECTL pRect)
+// Internal Use
+typedef struct _METATYPEOBJ
 {
-    UNIMPLEMENTED;
-    return 0;
+    BASEOBJECT  BaseObject;
+    DWORD iType;
+    DWORD mm;
+    DWORD xExt;
+    DWORD yExt;
+    ULONG cjData;
+    PBYTE pjData[4];
+} METATYPEOBJ, *PMETATYPEOBJ;
+
+
+//
+//  Plug Me in Somewhere? Clipboard cleanup?
+//
+VOID
+FASTCALL
+METATYPEOBJ__vCleanup(PVOID ObjectBody)
+{
+    PMETATYPEOBJ pmto = (PMETATYPEOBJ)ObjectBody;
+    GDIOBJ_hInsertObject(&pmto->BaseObject, GDI_OBJ_HMGR_POWNED);
+    GDIOBJ_vDeleteObject(&pmto->BaseObject);
 }
 
+/* System Service Calls ******************************************************/
+
 /*
  * @implemented
  */
@@ -34,38 +51,141 @@ HDC
 APIENTRY
 NtGdiCreateMetafileDC(IN HDC hdc)
 {
-    /* Call the internal function to create an alternative info DC */
-    return GreCreateCompatibleDC(hdc, TRUE);
+    //if (hdc)
+        /* Call the internal function to create an alternative info DC */
+        return GreCreateCompatibleDC(hdc, TRUE);
+    // No HDC call NtUser.
+    //return UserGetDesktopDC(DCTYPE_INFO, TRUE, FALSE);
 }
 
 /*
- * @unimplemented
+ * @implemented
  */
 HANDLE
 APIENTRY
-NtGdiCreateServerMetaFile(IN DWORD iType,
-                          IN ULONG cjData,
-                          IN PBYTE pjData,
-                          IN DWORD mm,
-                          IN DWORD xExt,
-                          IN DWORD yExt)
+NtGdiCreateServerMetaFile(
+    IN DWORD iType,
+    IN ULONG cjData,
+    IN PBYTE pjData,
+    IN DWORD mm,
+    IN DWORD xExt,
+    IN DWORD yExt
+)
 {
-    UNIMPLEMENTED;
+    BOOL Pass = TRUE;
+    PMETATYPEOBJ pmto;
+
+    if ( ( iType == GDITAG_TYPE_EMF || iType == GDITAG_TYPE_MFP ) &&
+        cjData &&
+        pjData )
+    {
+        pmto = (PMETATYPEOBJ)GDIOBJ_AllocObjWithHandle(GDIObjType_META_TYPE, sizeof(METATYPEOBJ) + cjData);
+        if ( pmto )
+        {
+            pmto->iType  = iType;
+            pmto->mm     = mm;
+            pmto->xExt   = xExt;
+            pmto->yExt   = yExt;
+            pmto->cjData = cjData;
+
+            _SEH2_TRY
+            {
+                 ProbeForRead( pjData, cjData, 1 );
+                 RtlCopyMemory( pmto->pjData, pjData, cjData) ;
+            }
+            _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
+            {
+                Pass = FALSE;
+            }
+            _SEH2_END;
+
+            if (Pass)
+            {
+               GDIOBJ_vSetObjectOwner(&pmto->BaseObject, GDI_OBJ_HMGR_PUBLIC);
+               GDIOBJ_vDereferenceObject ((POBJ)pmto);
+               return pmto->BaseObject.hHmgr;
+            }
+            else
+            {
+               GDIOBJ_vDeleteObject(&pmto->BaseObject);
+            }
+        }
+    }
     return NULL;
 }
 
 /*
- * @unimplemented
+ * @implemented
  */
 ULONG
 APIENTRY
-NtGdiGetServerMetaFileBits(IN HANDLE hmo,
-                           IN ULONG cjData,
-                           OUT OPTIONAL PBYTE pjData,
-                           OUT PDWORD piType,
-                           OUT PDWORD pmm,
-                           OUT PDWORD pxExt,
-                           OUT PDWORD pyExt)
+NtGdiGetServerMetaFileBits(
+    IN HANDLE hmo,
+    IN ULONG cjData,
+    OUT OPTIONAL PBYTE pjData,
+    OUT PDWORD piType,
+    OUT PDWORD pmm,
+    OUT PDWORD pxExt,
+    OUT PDWORD pyExt
+)
+{
+    ULONG cjRet = 0;
+    PMETATYPEOBJ pmto;
+
+    pmto = (PMETATYPEOBJ) GDIOBJ_ShareLockObj ((HGDIOBJ) hmo, GDIObjType_META_TYPE);
+
+    if (!pmto)
+        return 0;
+
+    if ( pmto->iType == GDITAG_TYPE_EMF || pmto->iType == GDITAG_TYPE_MFP )
+    {
+        cjRet = pmto->cjData;
+
+        if ( cjData )
+        {
+            if (cjData == pmto->cjData)
+            {
+                _SEH2_TRY
+                {
+                    ProbeForWrite( piType, sizeof(DWORD), 1);
+                    *piType = pmto->iType;
+
+                    ProbeForWrite( pmm, sizeof(DWORD), 1);
+                    *pmm = pmto->mm;
+
+                    ProbeForWrite( pxExt, sizeof(DWORD), 1);
+                    *pxExt = pmto->xExt;
+
+                    ProbeForWrite( pyExt, sizeof(DWORD), 1);
+                    *pyExt = pmto->yExt;
+
+                    ProbeForWrite( pjData, cjData, 1 );
+                    RtlCopyMemory( pjData, pmto->pjData, cjData) ;
+                }
+                _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
+                {
+                    cjRet = 0;
+                }
+                _SEH2_END;
+            }
+            else
+            {
+                cjRet = 0;
+            }
+        }
+    }
+
+    GDIOBJ_vDereferenceObject ((POBJ)pmto);
+    return cjRet;
+}
+
+/*
+ * @unimplemented
+ */
+LONG
+APIENTRY
+NtGdiConvertMetafileRect(IN HDC hDC,
+                         IN OUT PRECTL pRect)
 {
     UNIMPLEMENTED;
     return 0;