diballoc.cpp
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- /* ***** BEGIN LICENSE BLOCK *****
- * Source last modified: $Id: diballoc.cpp,v 1.3.42.2 2004/07/26 09:01:25 pankajgupta Exp $
- *
- * Portions Copyright (c) 1995-2004 RealNetworks, Inc. All Rights Reserved.
- *
- * The contents of this file, and the files included with this file,
- * are subject to the current version of the RealNetworks Public
- * Source License (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the current version of the RealNetworks Community
- * Source License (the "RCSL") available at
- * http://www.helixcommunity.org/content/rcsl, in which case the RCSL
- * will apply. You may also obtain the license terms directly from
- * RealNetworks. You may not use this file except in compliance with
- * the RPSL or, if you have a valid RCSL with RealNetworks applicable
- * to this file, the RCSL. Please see the applicable RPSL or RCSL for
- * the rights, obligations and limitations governing use of the
- * contents of the file.
- *
- * Alternatively, the contents of this file may be used under the
- * terms of the GNU General Public License Version 2 or later (the
- * "GPL") in which case the provisions of the GPL are applicable
- * instead of those above. If you wish to allow use of your version of
- * this file only under the terms of the GPL, and not to allow others
- * to use your version of this file under the terms of either the RPSL
- * or RCSL, indicate your decision by deleting the provisions above
- * and replace them with the notice and other provisions required by
- * the GPL. If you do not delete the provisions above, a recipient may
- * use your version of this file under the terms of any one of the
- * RPSL, the RCSL or the GPL.
- *
- * This file is part of the Helix DNA Technology. RealNetworks is the
- * developer of the Original Code and owns the copyrights in the
- * portions it created.
- *
- * This file, and the files included with this file, is distributed
- * and made available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY
- * KIND, EITHER EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS
- * ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES
- * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET
- * ENJOYMENT OR NON-INFRINGEMENT.
- *
- * Technology Compatibility Kit Test Suite(s) Location:
- * http://www.helixcommunity.org/content/tck
- *
- * Contributor(s):
- *
- * ***** END LICENSE BLOCK ***** */
- #include "hxtypes.h"
- #include <windows.h>
- #include <windowsx.h>
- #include "hxmap.h"
- #include "hxassert.h"
- #include "hxerrors.h"
- #include "diballoc.h"
- #include "hxheap.h"
- ///////////////////
- // private data
- #ifdef _DEBUG
- #undef HX_THIS_FILE
- static const char HX_THIS_FILE[] = __FILE__;
- #endif
- CHXDIBits::CHXDIBits()
- {
- m_hDIB = NULL;
- }
- CHXDIBits::~CHXDIBits()
- {
- if (m_hDIB)
- {
- GlobalFree(m_hDIB);
- m_hDIB = NULL;
- }
- }
- HX_RESULT
- CHXDIBits::GetDIBits(HDC hDC,
- HBITMAP hBM,
- UCHAR*& pBits,
- BITMAPINFOHEADER*& pHeader)
- {
- HX_RESULT hr = HXR_OK;
- WORD wBits = 0;
- DWORD dwLen = 0;
- BITMAP bm;
- BITMAPINFOHEADER bi;
- LPBITMAPINFOHEADER lpbi = NULL;
- pBits = NULL;
- pHeader = NULL;
- if (!hDC || !hBM)
- {
- hr = HXR_FAILED;
- goto cleanup;
- }
- GetObject(hBM, sizeof(bm), &bm);
- wBits = (WORD)(bm.bmPlanes * bm.bmBitsPixel);
- bi.biSize = sizeof(BITMAPINFOHEADER);
- bi.biWidth = bm.bmWidth;
- bi.biHeight = bm.bmHeight;
- bi.biPlanes = 1;
- bi.biBitCount = wBits;
- bi.biCompression = BI_RGB;
- bi.biSizeImage = WIDTHBYTES(bm.bmWidth * wBits) * bm.bmHeight;
- bi.biXPelsPerMeter = 0;
- bi.biYPelsPerMeter = 0;
- bi.biClrUsed = 0;
- bi.biClrImportant = 0;
- dwLen = bi.biSize + DibNumColors(&bi) * sizeof(RGBQUAD) + bi.biSizeImage;
- if (!m_hDIB)
- {
- m_hDIB = GlobalAlloc(GMEM_MOVEABLE, dwLen);
- }
- else if (m_hDIB && (GlobalSize(m_hDIB) != dwLen))
- {
- GlobalFree(m_hDIB);
- m_hDIB = GlobalAlloc(GMEM_MOVEABLE, dwLen);
- }
- lpbi = (LPBITMAPINFOHEADER)GlobalLock(m_hDIB);
- if (!lpbi)
- {
- // This is bad, it's not clear how callers of this class can
- // really handle a failure case. So, we need to make sure that
- // all our callers do handle this correctly.
- HX_ASSERT(lpbi);
- hr = HXR_FAILED;
- goto cleanup;
- }
- *lpbi = bi;
- ::GetDIBits(hDC,
- hBM,
- 0,
- (WORD)bi.biHeight,
- DibPtr(lpbi),
- (LPBITMAPINFO)lpbi,
- DIB_RGB_COLORS);
- bi = *lpbi;
- lpbi->biClrUsed = DibNumColors(lpbi);
- pBits = (UCHAR*)DibPtr(lpbi);
- pHeader = lpbi;
- GlobalUnlock(m_hDIB);
- cleanup:
- return hr;
- }