Index: subsystems/win32/win32k/include/dib.h
===================================================================
--- subsystems/win32/win32k/include/dib.h	(revision 39857)
+++ subsystems/win32/win32k/include/dib.h	(working copy)
@@ -17,6 +17,6 @@
 DIB_MapPaletteColors(PDC dc, CONST BITMAPINFO* lpbmi);
 
 HPALETTE FASTCALL
-BuildDIBPalette (CONST BITMAPINFO *bmi, PINT paletteType);
+BuildDIBPalette (CONST BITMAPINFO *bmi, PINT paletteType, INT colorres);
 
 #endif /* _WIN32K_DIB_H */
Index: subsystems/win32/win32k/objects/brush.c
===================================================================
--- subsystems/win32/win32k/objects/brush.c	(revision 39857)
+++ subsystems/win32/win32k/objects/brush.c	(working copy)
@@ -365,7 +365,7 @@
 
    psurfPattern = SURFACE_LockSurface(hPattern);
    ASSERT(psurfPattern != NULL);
-   psurfPattern->hDIBPalette = BuildDIBPalette(BitmapInfo, &PaletteType);
+   psurfPattern->hDIBPalette = BuildDIBPalette(BitmapInfo, &PaletteType, 0);
    SURFACE_UnlockSurface(psurfPattern);
 
    BrushObject = BRUSHOBJ_AllocBrushWithHandle();
Index: subsystems/win32/win32k/objects/dibobj.c
===================================================================
--- subsystems/win32/win32k/objects/dibobj.c	(revision 39857)
+++ subsystems/win32/win32k/objects/dibobj.c	(working copy)
@@ -286,7 +286,7 @@
   PALETTE_UnlockPalette(hDCPalette);
 
   // Source palette obtained from the BITMAPINFO
-  DIB_Palette = BuildDIBPalette ( (PBITMAPINFO)bmi, (PINT)&DIB_Palette_Type );
+  DIB_Palette = BuildDIBPalette ( (PBITMAPINFO)bmi, (PINT)&DIB_Palette_Type, IntGdiGetDeviceCaps(DC, COLORRES) );
   if (NULL == DIB_Palette)
     {
       EngUnlockSurface(SourceSurf);
@@ -526,7 +526,7 @@
     DDBPalette = ((GDIDEVICE *)pDC->pPDev)->DevInfo.hpalDefault;
     PALETTE_UnlockPalette(pDCPalette);
 
-    DIBPalette = BuildDIBPalette(bmi, (PINT)&DIBPaletteType);
+    DIBPalette = BuildDIBPalette(bmi, (PINT)&DIBPaletteType, IntGdiGetDeviceCaps(pDC, COLORRES));
     if (!DIBPalette)
     {
        SetLastWin32Error(ERROR_NO_SYSTEM_RESOURCES);
@@ -718,7 +718,7 @@
           bPaletteMatch = TRUE;
        }
        else
-          hDestPalette = BuildDIBPalette(Info, (PINT)&DestPaletteType); //hDestPalette = Dc->DevInfo->hpalDefault;
+          hDestPalette = BuildDIBPalette(Info, (PINT)&DestPaletteType, 0); //hDestPalette = Dc->DevInfo->hpalDefault;
 
        SourcePalette = PALETTE_LockPalette(hSourcePalette);
        /* FIXME - SourcePalette can be NULL!!! Don't assert here! */
@@ -1638,8 +1638,13 @@
   return lpRGB;
 }
 
+//Bitmap round bit always to 1, 2, 4, 8, 16, 24, 32
+//colorres for device real mask
+//exalpe:
+//16 bit device mask 555 "if not installed driver"
+//16 bit device mask 565 "if installed driver"
 HPALETTE FASTCALL
-BuildDIBPalette (CONST BITMAPINFO *bmi, PINT paletteType)
+BuildDIBPalette (CONST BITMAPINFO *bmi, PINT paletteType, INT colorres)
 {
   BYTE bits;
   ULONG ColorCount;
@@ -1663,12 +1668,19 @@
       GreenMask = ((ULONG *)bmi->bmiColors)[1];
       BlueMask = ((ULONG *)bmi->bmiColors)[2];
     }
-  else if(bits < 24)
+  else if(bits < 16 || (bits == 16 && colorres == 15))
     {
       *paletteType = PAL_BITFIELDS;
       RedMask = 0x7c00;
       GreenMask = 0x03e0;
       BlueMask = 0x001f;
+    }         
+  else if(bits < 24)
+    {
+      *paletteType = PAL_BITFIELDS;
+      RedMask = 0xf800;
+      GreenMask = 0x07e0;
+      BlueMask = 0x001f;
     }
   else
     {