[tkreuzer] 56591: [WIN32K] Implement DC_bIsBitmapCompatible, which checks if a bitmap can be used with the DC in SelectBitmap or GetDIBits

Author: tkreuzer
Date: Tue May 15 16:52:21 2012
New Revision: 56591

URL: http://svn.reactos.org/svn/reactos?rev=56591&view=rev
Log:
[WIN32K]
Implement DC_bIsBitmapCompatible, which checks if a bitmap can be used with the DC in
SelectBitmap or GetDIBits

Modified:
    branches/dib_rewrite/win32ss/gdi/ntgdi/dc.h
    branches/dib_rewrite/win32ss/gdi/ntgdi/dcobjs.c

Modified: branches/dib_rewrite/win32ss/gdi/ntgdi/dc.h
URL:
http://svn.reactos.org/svn/reactos/branches/dib_rewrite/win32ss/gdi/ntgdi/d…
==============================================================================
--- branches/dib_rewrite/win32ss/gdi/ntgdi/dc.h [iso-8859-1] (original)
+++ branches/dib_rewrite/win32ss/gdi/ntgdi/dc.h [iso-8859-1] Tue May 15 16:52:21 2012
@@ -193,6 +193,10 @@
 NTAPI
 DC_vSetBrushOrigin(PDC pdc, LONG x, LONG y);
 
+BOOL
+NTAPI
+DC_bIsBitmapCompatible(PDC pdc, PSURFACE psurf);
+
 FORCEINLINE
 PDC
 DC_LockDc(HDC hdc)

Modified: branches/dib_rewrite/win32ss/gdi/ntgdi/dcobjs.c
URL:
http://svn.reactos.org/svn/reactos/branches/dib_rewrite/win32ss/gdi/ntgdi/d…
==============================================================================
--- branches/dib_rewrite/win32ss/gdi/ntgdi/dcobjs.c [iso-8859-1] (original)
+++ branches/dib_rewrite/win32ss/gdi/ntgdi/dcobjs.c [iso-8859-1] Tue May 15 16:52:21 2012
@@ -316,6 +316,28 @@
     return hOrgPen;
 }
 
+BOOL
+NTAPI
+DC_bIsBitmapCompatible(PDC pdc, PSURFACE psurf)
+{
+    ULONG cBitsPixel;
+
+    /* Must be an API bitmap */
+    if (!(psurf->flags & API_BITMAP)) return FALSE;
+
+    /* DIB sections are always compatible */
+    if (psurf->ppal->flFlags & PAL_DIBSECTION) return TRUE;
+
+    /* Get the bit depth of the bitmap */
+    cBitsPixel = gajBitsPerFormat[psurf->SurfObj.iBitmapFormat];
+
+    /* 1 BPP is compatible */
+    if ((cBitsPixel == 1) || (cBitsPixel == pdc->ppdev->gdiinfo.cBitsPixel))
+        return TRUE;
+
+    return FALSE;
+}
+
 /*
  * @implemented
  */
@@ -330,7 +352,6 @@
     PSURFACE psurfNew, psurfOld;
     HRGN hVisRgn;
     HDC hdcOld;
-    ULONG cBitsPixel;
     ASSERT_NOGDILOCKS();
 
     /* Verify parameters */
@@ -396,10 +417,7 @@
         }
 
         /* Check if the bitmap is compatile with the dc */
-        cBitsPixel = gajBitsPerFormat[psurfNew->SurfObj.iBitmapFormat];
-        if ((cBitsPixel != 1) &&
-            (cBitsPixel != pdc->ppdev->gdiinfo.cBitsPixel) &&
-            (psurfNew->hSecure == NULL))
+        if (!DC_bIsBitmapCompatible(pdc, psurfNew))
         {
             /* Dereference the bitmap, unlock the DC and fail. */
             SURFACE_ShareUnlockSurface(psurfNew);