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- BITMAP_Cleanup: Fix leak of DIBSECTION structure; remove redundant ifs.

Browse source 
- NtGdi(Get|Set)BitmapDimension: SEHify; set ERROR_INVALID_HANDLE on a bad non-NULL bitmap.
- NtGdiGetDCforBitmap: Don't crash on bad bitmap.

svn path=/trunk/; revision=34288
This commit is contained in:
Jeffrey Morlan 2008-07-04 00:05:31 +00:00
parent 8bf777a515
commit 8912b7b4c8
1 changed files with 44 additions and 10 deletions
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54
reactos/subsystems/win32/win32k/objects/bitmaps.c
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@ -133,13 +133,11 @@ BITMAP_Cleanup(PVOID ObjectBody)
{
if (pBmp->dib == NULL)
{
if (pBmp->SurfObj.pvBits != NULL)
ExFreePool(pBmp->SurfObj.pvBits);
ExFreePool(pBmp->SurfObj.pvBits);
}
else
{
if (pBmp->SurfObj.pvBits != NULL)
EngFreeUserMem(pBmp->SurfObj.pvBits);
EngFreeUserMem(pBmp->SurfObj.pvBits);
}
if (pBmp->hDIBPalette != NULL)
{
@ -153,6 +151,9 @@ BITMAP_Cleanup(PVOID ObjectBody)
pBmp->BitsLock = NULL;
}
if (pBmp->dib)
ExFreePoolWithTag(pBmp->dib, TAG_DIB);
return TRUE;
}
@ -218,18 +219,32 @@ NtGdiGetBitmapDimension(
LPSIZE Dimension)
{
PBITMAPOBJ bmp;
BOOL Ret = TRUE;
if (hBitmap == NULL)
return FALSE;
bmp = BITMAPOBJ_LockBitmap(hBitmap);
if (bmp == NULL)
{
SetLastWin32Error(ERROR_INVALID_HANDLE);
return FALSE;
}
*Dimension = bmp->dimension;
_SEH_TRY
{
ProbeForWrite(Dimension, sizeof(SIZE), 1);
*Dimension = bmp->dimension;
}
_SEH_HANDLE
{
Ret = FALSE;
}
_SEH_END
BITMAPOBJ_UnlockBitmap(bmp);
return TRUE;
return Ret;
}
COLORREF STDCALL
@ -504,23 +519,39 @@ NtGdiSetBitmapDimension(
LPSIZE Size)
{
PBITMAPOBJ bmp;
BOOL Ret = TRUE;
if (hBitmap == NULL)
return FALSE;
bmp = BITMAPOBJ_LockBitmap(hBitmap);
if (bmp == NULL)
{
SetLastWin32Error(ERROR_INVALID_HANDLE);
return FALSE;
}
if (Size)
{
*Size = bmp->dimension;
_SEH_TRY
{
ProbeForWrite(Size, sizeof(SIZE), 1);
*Size = bmp->dimension;
}
_SEH_HANDLE
{
Ret = FALSE;
}
_SEH_END
}
/* The dimension is changed even if writing the old value failed */
bmp->dimension.cx = Width;
bmp->dimension.cy = Height;
BITMAPOBJ_UnlockBitmap (bmp);
return TRUE;
return Ret;
}
BOOL STDCALL
@ -746,8 +777,11 @@ NtGdiGetDCforBitmap(
{
HDC hDC = NULL;
PBITMAPOBJ bmp = BITMAPOBJ_LockBitmap( hsurf );
hDC = bmp->hDC;
BITMAPOBJ_UnlockBitmap( bmp );
if (bmp)
{
hDC = bmp->hDC;
BITMAPOBJ_UnlockBitmap( bmp );
}
return hDC;
}