From a7bbf47f1b51e388a19e741986cca33feeff1447 Mon Sep 17 00:00:00 2001
From: Dave Belanger <dave.belanger@cimmetry.com>
Date: Wed, 8 Oct 2003 22:33:35 +0000
Subject: [PATCH] Avoid excessive heap memory reallocation when generating EMF
 metarecords in memory.

---
 dlls/gdi/enhmfdrv/init.c | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/dlls/gdi/enhmfdrv/init.c b/dlls/gdi/enhmfdrv/init.c
index 4c7323b6cc..9ce54607c8 100644
--- a/dlls/gdi/enhmfdrv/init.c
+++ b/dlls/gdi/enhmfdrv/init.c
@@ -185,12 +185,16 @@ BOOL EMFDRV_WriteRecord( PHYSDEV dev, EMR *emr )
 	if (!WriteFile(physDev->hFile, (char *)emr, emr->nSize, NULL, NULL))
 	    return FALSE;
     } else {
-	len = physDev->emh->nBytes;
-	emh = HeapReAlloc( GetProcessHeap(), 0, physDev->emh, len );
-        if (!emh) return FALSE;
-        physDev->emh = emh;
-	memcpy((CHAR *)physDev->emh + physDev->emh->nBytes - emr->nSize, emr,
-	       emr->nSize);
+        DWORD nEmfSize = HeapSize(GetProcessHeap(), 0, physDev->emh);
+        len = physDev->emh->nBytes;
+        if (len > nEmfSize) {
+            nEmfSize += (nEmfSize / 2) + emr->nSize;
+            emh = HeapReAlloc(GetProcessHeap(), 0, physDev->emh, nEmfSize);
+            if (!emh) return FALSE;
+            physDev->emh = emh;
+        }
+        memcpy((CHAR *)physDev->emh + physDev->emh->nBytes - emr->nSize, emr,
+               emr->nSize);
     }
     return TRUE;
 }
-- 
2.32.0.93.g670b81a890