[tkreuzer] 56553: [WIN32K] - Make EngSecureMem probe the buffer, so we have at least a minimum functionality, even though it's not safe - Implement EngSecureMemForRead - Use IntEngBitBlt from IntEn...

Author: tkreuzer
Date: Wed May  9 20:15:23 2012
New Revision: 56553

URL: http://svn.reactos.org/svn/reactos?rev=56553&view=rev
Log:
[WIN32K]
- Make EngSecureMem probe the buffer, so we have at least a minimum functionality, even
though it's not safe
- Implement EngSecureMemForRead
- Use IntEngBitBlt from IntEngStretchBlt, when source and dest size are equal

Modified:
    trunk/reactos/win32ss/gdi/eng/eng.h
    trunk/reactos/win32ss/gdi/eng/mem.c
    trunk/reactos/win32ss/gdi/eng/stretchblt.c
    trunk/reactos/win32ss/gdi/gdi32/objects/bitmap.c

Modified: trunk/reactos/win32ss/gdi/eng/eng.h
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/win32ss/gdi/eng/eng.h?rev=…
==============================================================================
--- trunk/reactos/win32ss/gdi/eng/eng.h [iso-8859-1] (original)
+++ trunk/reactos/win32ss/gdi/eng/eng.h [iso-8859-1] Wed May  9 20:15:23 2012
@@ -26,3 +26,7 @@
 ULONGLONG APIENTRY EngGetTickCount(VOID);
 
 VOID DecompressBitmap(SIZEL Size, BYTE *CompressedBits, BYTE *UncompressedBits, LONG
Delta, ULONG iFormat);
+
+HANDLE
+APIENTRY
+EngSecureMemForRead(PVOID Address, ULONG Length);

Modified: trunk/reactos/win32ss/gdi/eng/mem.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/win32ss/gdi/eng/mem.c?rev=…
==============================================================================
--- trunk/reactos/win32ss/gdi/eng/mem.c [iso-8859-1] (original)
+++ trunk/reactos/win32ss/gdi/eng/mem.c [iso-8859-1] Wed May  9 20:15:23 2012
@@ -157,11 +157,53 @@
 /*
  * @implemented
  */
-HANDLE APIENTRY
+HANDLE
+APIENTRY
 EngSecureMem(PVOID Address, ULONG Length)
 {
-    return (HANDLE)-1; // HACK!!!
+    {// HACK!!!
+        _SEH2_TRY
+        {
+            ProbeForWrite(Address, Length, 1);
+        }
+        _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
+        {
+            _SEH2_YIELD(return NULL);
+        }
+        _SEH2_END;
+        return (HANDLE)-1;
+    }
     return MmSecureVirtualMemory(Address, Length, PAGE_READWRITE);
+}
+
+HANDLE
+APIENTRY
+EngSecureMemForRead(PVOID Address, ULONG Length)
+{
+    {// HACK!!!
+        ULONG cPages;
+        volatile BYTE *pjProbe;
+
+        _SEH2_TRY
+        {
+            ProbeForRead(Address, Length, 1);
+            cPages = ADDRESS_AND_SIZE_TO_SPAN_PAGES(Address, Length);
+            pjProbe = ALIGN_DOWN_POINTER_BY(Address, PAGE_SIZE);
+            while(cPages--)
+            {
+                /* Do a read probe */
+                (void)*pjProbe;
+                pjProbe += PAGE_SIZE;
+            }
+        }
+        _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
+        {
+            _SEH2_YIELD(return NULL);
+        }
+        _SEH2_END;
+        return (HANDLE)-1;
+    }
+    return MmSecureVirtualMemory(Address, Length, PAGE_READONLY);
 }
 
 /*

Modified: trunk/reactos/win32ss/gdi/eng/stretchblt.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/win32ss/gdi/eng/stretchblt…
==============================================================================
--- trunk/reactos/win32ss/gdi/eng/stretchblt.c [iso-8859-1] (original)
+++ trunk/reactos/win32ss/gdi/eng/stretchblt.c [iso-8859-1] Wed May  9 20:15:23 2012
@@ -390,6 +390,24 @@
     /* Sanity check */
     ASSERT(IS_VALID_ROP4(Rop4));
 
+    /* Check if source and dest size are equal */
+    if (((DestRect->right - DestRect->left) == (SourceRect->right -
SourceRect->left)) &&
+        ((DestRect->bottom - DestRect->top) == (SourceRect->bottom -
SourceRect->top)))
+    {
+        /* Pass the request to IntEngBitBlt */
+        return IntEngBitBlt(psoDest,
+                            psoSource,
+                            MaskSurf,
+                            ClipRegion,
+                            ColorTranslation,
+                            DestRect,
+                            (PPOINTL)SourceRect,
+                            pMaskOrigin,
+                            pbo,
+                            BrushOrigin,
+                            Rop4);
+    }
+
     InputClippedRect = *DestRect;
     if (InputClippedRect.right < InputClippedRect.left)
     {

Modified: trunk/reactos/win32ss/gdi/gdi32/objects/bitmap.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/win32ss/gdi/gdi32/objects/…
==============================================================================
--- trunk/reactos/win32ss/gdi/gdi32/objects/bitmap.c [iso-8859-1] (original)
+++ trunk/reactos/win32ss/gdi/gdi32/objects/bitmap.c [iso-8859-1] Wed May  9 20:15:23
2012
@@ -200,9 +200,9 @@
                                          dwOffset,
                                          pConvertedInfo,
                                          Usage,
-                                         0,
-                                         0,
-                                         0,
+                                         ConvertedInfoSize,
+                                         0, // fl
+                                         0, // dwColorSpace
                                          &bmBits);
         if (BitmapInfo != pConvertedInfo)
             RtlFreeHeap(RtlGetProcessHeap(), 0, pConvertedInfo);