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[GDI32]

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- allocate sufficient buffer when creating a DIBSECTION compatible bitmap.
Fixes bug 5822

svn path=/trunk/; revision=51014
This commit is contained in:
Jérôme Gardou 2011-03-11 10:33:03 +00:00
parent 1e2dd5d5d2
commit fd5a3bdc63
1 changed files with 15 additions and 10 deletions
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25
reactos/dll/win32/gdi32/objects/bitmap.c
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@ -348,8 +348,6 @@ CreateCompatibleBitmap(
INT Height)
{
PDC_ATTR pDc_Attr;
HBITMAP hBmp = NULL;
DIBSECTION dibs;
if (!GdiGetHandleUserData(hDC, GDI_OBJECT_TYPE_DC, (PVOID)&pDc_Attr))
return NULL;
@ -361,19 +359,26 @@ CreateCompatibleBitmap(
{
return NtGdiCreateCompatibleBitmap(hDC, Width, Height);
}
else
{
HBITMAP hBmp = NULL;
char buffer[sizeof(DIBSECTION) + 256*sizeof(RGBQUAD)];
DIBSECTION* pDIBs = (DIBSECTION*)buffer;
hBmp = NtGdiGetDCObject(hDC, GDI_OBJECT_TYPE_BITMAP);
hBmp = NtGdiGetDCObject(hDC, GDI_OBJECT_TYPE_BITMAP);
if ( GetObjectA(hBmp, sizeof(DIBSECTION), &dibs) != sizeof(DIBSECTION) )
return NULL;
if ( GetObjectA(hBmp, sizeof(DIBSECTION), pDIBs) != sizeof(DIBSECTION) )
return NULL;
if ( dibs.dsBm.bmBitsPixel <= 8 )
GetDIBColorTable(hDC, 0, 256, (RGBQUAD *)&dibs.dsBitfields);
if ( pDIBs->dsBm.bmBitsPixel <= 8 )
GetDIBColorTable(hDC, 0, 256, (RGBQUAD *)&pDIBs->dsBitfields[0]);
dibs.dsBmih.biWidth = Width;
dibs.dsBmih.biHeight = Height;
pDIBs->dsBmih.biWidth = Width;
pDIBs->dsBmih.biHeight = Height;
return CreateDIBSection(hDC, (CONST BITMAPINFO *)&dibs.dsBmih, 0, NULL, NULL, 0);
return CreateDIBSection(hDC, (CONST BITMAPINFO *)&pDIBs->dsBmih, 0, NULL, NULL, 0);
}
return NULL;
}