[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

svn path=/trunk/; revision=56553

reactos/win32ss/gdi/eng/eng.h

@@ -26,3 +26,7 @@ VOID FASTCALL IntGdiReleaseSemaphore ( HSEMAPHORE hsem );
 ULONGLONG APIENTRY EngGetTickCount(VOID);
 
 VOID DecompressBitmap(SIZEL Size, BYTE *CompressedBits, BYTE *UncompressedBits, LONG Delta, ULONG iFormat);
+
+HANDLE
+APIENTRY
+EngSecureMemForRead(PVOID Address, ULONG Length);

reactos/win32ss/gdi/eng/mem.c

@@ -157,13 +157,55 @@ HackUnsecureVirtualMemory(
 /*
  * @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);
+}
+
 /*
  * @implemented
  */

reactos/win32ss/gdi/eng/stretchblt.c

@@ -390,6 +390,24 @@ IntEngStretchBlt(SURFOBJ *psoDest,
     /* 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)
     {

reactos/win32ss/gdi/gdi32/objects/bitmap.c

@@ -200,9 +200,9 @@ CreateDIBSection(
                                          dwOffset,
                                          pConvertedInfo,
                                          Usage,
-                                         0,
-                                         0,
-                                         0,
+                                         ConvertedInfoSize,
+                                         0, // fl
+                                         0, // dwColorSpace
                                          &bmBits);
         if (BitmapInfo != pConvertedInfo)
             RtlFreeHeap(RtlGetProcessHeap(), 0, pConvertedInfo);