[tkreuzer] 66885: [WIN32K] Implement GreCreateDIBitmapFromPackedDIB

Author: tkreuzer
Date: Wed Mar 25 22:27:16 2015
New Revision: 66885

URL: http://svn.reactos.org/svn/reactos?rev=66885&view=rev
Log:
[WIN32K]
Implement GreCreateDIBitmapFromPackedDIB

Modified:
    trunk/reactos/win32ss/gdi/ntgdi/dib.h
    trunk/reactos/win32ss/gdi/ntgdi/dibobj.c

Modified: trunk/reactos/win32ss/gdi/ntgdi/dib.h
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/win32ss/gdi/ntgdi/dib.h?rev...
==============================================================================
--- trunk/reactos/win32ss/gdi/ntgdi/dib.h	[iso-8859-1] (original)
+++ trunk/reactos/win32ss/gdi/ntgdi/dib.h	[iso-8859-1] Wed Mar 25 22:27:16 2015
@@ -26,4 +26,11 @@
     UINT MaxBits,
     UINT MaxInfo);

+HBITMAP
+NTAPI
+GreCreateDIBitmapFromPackedDIB(
+    _In_reads_(cjPackedDIB )PVOID pvPackedDIB,
+    _In_ UINT cjPackedDIB,
+    _In_ ULONG uUsage);
+
 #define DIB_PAL_BRUSHHACK 3

Modified: trunk/reactos/win32ss/gdi/ntgdi/dibobj.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/win32ss/gdi/ntgdi/dibobj.c?...
==============================================================================
--- trunk/reactos/win32ss/gdi/ntgdi/dibobj.c	[iso-8859-1] (original)
+++ trunk/reactos/win32ss/gdi/ntgdi/dibobj.c	[iso-8859-1] Wed Mar 25 22:27:16 2015
@@ -1539,6 +1539,56 @@
     return Bmp;
 }

+HBITMAP
+NTAPI
+GreCreateDIBitmapFromPackedDIB(
+    _In_reads_(cjPackedDIB )PVOID pvPackedDIB,
+    _In_ UINT cjPackedDIB,
+    _In_ ULONG uUsage)
+{
+    PBITMAPINFO pbmi;
+    PBYTE pjBits;
+    UINT cjInfo, cjBits;
+    HBITMAP hbm;
+
+    /* We only support BITMAPINFOHEADER, make sure the size is ok */
+    if (cjPackedDIB < sizeof(BITMAPINFOHEADER))
+    {
+        return NULL;
+    }
+
+    /* The packed DIB starts with the BITMAPINFOHEADER */
+    pbmi = pvPackedDIB;
+
+    if (cjPackedDIB < pbmi->bmiHeader.biSize)
+    {
+        return NULL;
+    }
+
+    /* Calculate the info size and make sure the packed DIB is large enough */
+    cjInfo = DIB_BitmapInfoSize(pbmi, uUsage);
+    if (cjPackedDIB <= cjInfo)
+    {
+        return NULL;
+    }
+
+    /* The bitmap bits start after the header */
+    pjBits = (PBYTE)pvPackedDIB + cjInfo;
+    cjBits = cjPackedDIB - cjInfo;
+
+    hbm = GreCreateDIBitmapInternal(NULL,
+                                    pbmi->bmiHeader.biWidth,
+                                    abs(pbmi->bmiHeader.biHeight),
+                                    CBM_INIT | CBM_CREATDIB,
+                                    pjBits,
+                                    pbmi,
+                                    uUsage,
+                                    0,
+                                    cjBits,
+                                    NULL);
+
+    return hbm;
+}

HBITMAP
 APIENTRY