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Basic StretchDIBits implementation.

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svn path=/trunk/; revision=6882
This commit is contained in:
Filip Navara 2003-12-07 10:31:56 +00:00
parent 419d47d89f
commit c22a7eb6ed
1 changed files with 38 additions and 2 deletions
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40
reactos/subsys/win32k/objects/dib.c
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@ -1,5 +1,5 @@
/* /*
* $Id: dib.c,v 1.36 2003/11/08 11:19:47 navaraf Exp $ * $Id: dib.c,v 1.37 2003/12/07 10:31:56 navaraf Exp $
* *
* ReactOS W32 Subsystem * ReactOS W32 Subsystem
* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 ReactOS Team * Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 ReactOS Team
@ -430,7 +430,43 @@ INT STDCALL NtGdiStretchDIBits(HDC hDC,
UINT Usage, UINT Usage,
DWORD ROP) DWORD ROP)
{ {
UNIMPLEMENTED; HBITMAP hBitmap, hOldBitmap;
HDC hdcMem;
if (!Bits || !BitsInfo)
{
SetLastWin32Error(ERROR_INVALID_PARAMETER);
return 0;
}
hdcMem = NtGdiCreateCompatableDC(hDC);
hBitmap = NtGdiCreateCompatibleBitmap(hDC, BitsInfo->bmiHeader.biWidth,
BitsInfo->bmiHeader.biHeight);
hOldBitmap = NtGdiSelectObject(hdcMem, hBitmap);
if (BitsInfo->bmiHeader.biCompression == BI_RLE4 ||
BitsInfo->bmiHeader.biCompression == BI_RLE8)
{
/* copy existing bitmap from destination dc */
NtGdiStretchBlt(hdcMem, XSrc, abs(BitsInfo->bmiHeader.biHeight) - SrcHeight - YSrc,
SrcWidth, SrcHeight, hDC, XDest, YDest, DestWidth, DestHeight,
ROP);
}
NtGdiSetDIBits(hdcMem, hBitmap, 0, BitsInfo->bmiHeader.biHeight, Bits,
BitsInfo, Usage);
/* Origin for DIBitmap may be bottom left (positive biHeight) or top
left (negative biHeight) */
NtGdiStretchBlt(hDC, XDest, YDest, DestWidth, DestHeight,
hdcMem, XSrc, abs(BitsInfo->bmiHeader.biHeight) - SrcHeight - YSrc,
SrcWidth, SrcHeight, ROP);
NtGdiSelectObject(hdcMem, hOldBitmap);
NtGdiDeleteDC(hdcMem);
NtGdiDeleteObject(hBitmap);
return SrcHeight;
} }
LONG STDCALL NtGdiGetBitmapBits(HBITMAP hBitmap, LONG STDCALL NtGdiGetBitmapBits(HBITMAP hBitmap,