xref: /aoo42x/main/vcl/win/source/gdi/salbmp.cxx (revision 79aad27f) 
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21 
22 
23 
24 // MARKER(update_precomp.py): autogen include statement, do not remove
25 #include "precompiled_vcl.hxx"
26 
27 #include <tools/svwin.h>
28 
29 #include <vcl/bitmap.hxx> // for BitmapSystemData
30 #include <vcl/salbtype.hxx>
31 
32 #include <win/wincomp.hxx>
33 #include <win/salgdi.h>
34 #include <win/saldata.hxx>
35 #include <win/salbmp.h>
36 
37 #include <string.h>
38 
39 // -----------
40 // - Inlines -
41 // -----------
42 
43 inline void ImplSetPixel4( const HPBYTE pScanline, long nX, const BYTE cIndex )
44 {
45 	BYTE& rByte = pScanline[ nX >> 1 ];
46 
47 	( nX & 1 ) ? ( rByte &= 0xf0, rByte |= ( cIndex & 0x0f ) ) :
48 				 ( rByte &= 0x0f, rByte |= ( cIndex << 4 ) );
49 }
50 
51 // ----------------
52 // - WinSalBitmap -
53 // ----------------
54 
55 WinSalBitmap::WinSalBitmap() :
56 		mhDIB		( 0 ),
57 		mhDDB		( 0 ),
58 		mnBitCount	( 0 )
59 {
60 }
61 
62 // ------------------------------------------------------------------
63 
64 WinSalBitmap::~WinSalBitmap()
65 {
66 	Destroy();
67 }
68 
69 // ------------------------------------------------------------------
70 
71 bool WinSalBitmap::Create( HANDLE hBitmap, bool bDIB, bool bCopyHandle )
72 {
73 	bool bRet = TRUE;
74 
75 	if( bDIB )
76 		mhDIB = (HGLOBAL) ( bCopyHandle ? ImplCopyDIBOrDDB( hBitmap, TRUE ) : hBitmap );
77 	else
78 		mhDDB = (HBITMAP) ( bCopyHandle ? ImplCopyDIBOrDDB( hBitmap, FALSE ) : hBitmap );
79 
80 	if( mhDIB )
81 	{
82 		PBITMAPINFOHEADER pBIH = (PBITMAPINFOHEADER) GlobalLock( mhDIB );
83 
84 		maSize = Size( pBIH->biWidth, pBIH->biHeight );
85 		mnBitCount = pBIH->biBitCount;
86 
87 		if( mnBitCount )
88 			mnBitCount = ( mnBitCount <= 1 ) ? 1 : ( mnBitCount <= 4 ) ? 4 : ( mnBitCount <= 8 ) ? 8 : 24;
89 
90 		GlobalUnlock( mhDIB );
91 	}
92 	else if( mhDDB )
93 	{
94 		BITMAP	aDDBInfo;
95 
96 		if( WIN_GetObject( mhDDB, sizeof( BITMAP ), &aDDBInfo ) )
97 		{
98 			maSize = Size( aDDBInfo.bmWidth, aDDBInfo.bmHeight );
99 			mnBitCount = aDDBInfo.bmPlanes * aDDBInfo.bmBitsPixel;
100 
101 			if( mnBitCount )
102 			{
103 				mnBitCount = ( mnBitCount <= 1 ) ? 1 :
104 							 ( mnBitCount <= 4 ) ? 4 :
105 							 ( mnBitCount <= 8 ) ? 8 : 24;
106 			}
107 		}
108 		else
109 		{
110 			mhDDB = 0;
111 			bRet = FALSE;
112 		}
113 	}
114 	else
115 		bRet = FALSE;
116 
117 	return bRet;
118 }
119 
120 // ------------------------------------------------------------------
121 
122 bool WinSalBitmap::Create( const Size& rSize, sal_uInt16 nBitCount, const BitmapPalette& rPal )
123 {
124 	bool bRet = FALSE;
125 
126 	mhDIB = ImplCreateDIB( rSize, nBitCount, rPal );
127 
128 	if( mhDIB )
129 	{
130 		maSize = rSize;
131 		mnBitCount = nBitCount;
132 		bRet = TRUE;
133 	}
134 
135 	return bRet;
136 }
137 
138 // ------------------------------------------------------------------
139 
140 bool WinSalBitmap::Create( const SalBitmap& rSSalBitmap )
141 {
142 	bool bRet = FALSE;
143     const WinSalBitmap& rSalBitmap = static_cast<const WinSalBitmap&>(rSSalBitmap);
144 
145 	if ( rSalBitmap.mhDIB || rSalBitmap.mhDDB )
146 	{
147 		HANDLE hNewHdl = ImplCopyDIBOrDDB( rSalBitmap.mhDIB ? rSalBitmap.mhDIB : rSalBitmap.mhDDB,
148 										   rSalBitmap.mhDIB != 0 );
149 
150 		if ( hNewHdl )
151 		{
152 			if( rSalBitmap.mhDIB )
153 				mhDIB = (HGLOBAL) hNewHdl;
154 			else if( rSalBitmap.mhDDB )
155 				mhDDB = (HBITMAP) hNewHdl;
156 
157 			maSize = rSalBitmap.maSize;
158 			mnBitCount = rSalBitmap.mnBitCount;
159 
160 			bRet = TRUE;
161 		}
162 	}
163 
164 	return bRet;
165 }
166 
167 // ------------------------------------------------------------------
168 
169 bool WinSalBitmap::Create( const SalBitmap& rSSalBmp, SalGraphics* pSGraphics )
170 {
171 	bool bRet = FALSE;
172 
173     const WinSalBitmap& rSalBmp = static_cast<const WinSalBitmap&>(rSSalBmp);
174     WinSalGraphics* pGraphics = static_cast<WinSalGraphics*>(pSGraphics);
175 
176 	if( rSalBmp.mhDIB )
177 	{
178 		PBITMAPINFO 		pBI = (PBITMAPINFO) GlobalLock( rSalBmp.mhDIB );
179 		PBITMAPINFOHEADER	pBIH = (PBITMAPINFOHEADER) pBI;
180 		HDC 				hDC  = pGraphics->mhDC;
181 		HBITMAP 			hNewDDB;
182 		BITMAP				aDDBInfo;
183 		PBYTE				pBits = (PBYTE) pBI + *(DWORD*) pBI +
184 							ImplGetDIBColorCount( rSalBmp.mhDIB ) * sizeof( RGBQUAD );
185 
186 		if( pBIH->biBitCount == 1 )
187 		{
188 			hNewDDB = CreateBitmap( pBIH->biWidth, pBIH->biHeight, 1, 1, NULL );
189 
190 			if( hNewDDB )
191 				SetDIBits( hDC, hNewDDB, 0, pBIH->biHeight, pBits, pBI, DIB_RGB_COLORS );
192 		}
193 		else
194 			hNewDDB = CreateDIBitmap( hDC, (PBITMAPINFOHEADER) pBI, CBM_INIT, pBits, pBI, DIB_RGB_COLORS );
195 
196 		GlobalUnlock( rSalBmp.mhDIB );
197 
198 		if( hNewDDB && WIN_GetObject( hNewDDB, sizeof( BITMAP ), &aDDBInfo ) )
199 		{
200 			mhDDB = hNewDDB;
201 			maSize = Size( aDDBInfo.bmWidth, aDDBInfo.bmHeight );
202 			mnBitCount = aDDBInfo.bmPlanes * aDDBInfo.bmBitsPixel;
203 
204 			bRet = TRUE;
205 		}
206 		else if( hNewDDB )
207 			DeleteObject( hNewDDB );
208 	}
209 
210 	return bRet;
211 }
212 
213 // ------------------------------------------------------------------
214 
215 bool WinSalBitmap::Create( const SalBitmap& rSSalBmp, sal_uInt16 nNewBitCount )
216 {
217 	bool bRet = FALSE;
218 
219     const WinSalBitmap& rSalBmp = static_cast<const WinSalBitmap&>(rSSalBmp);
220 
221 	if( rSalBmp.mhDDB )
222 	{
223 		mhDIB = ImplCreateDIB( rSalBmp.maSize, nNewBitCount, BitmapPalette() );
224 
225 		if( mhDIB )
226 		{
227 			PBITMAPINFO pBI = (PBITMAPINFO) GlobalLock( mhDIB );
228 			const int	nLines = (int) rSalBmp.maSize.Height();
229 			HDC 		hDC = GetDC( 0 );
230 			PBYTE		pBits = (PBYTE) pBI + *(DWORD*) pBI +
231 								ImplGetDIBColorCount( mhDIB ) * sizeof( RGBQUAD );
232 			SalData*	pSalData = GetSalData();
233 			HPALETTE	hOldPal = 0;
234 
235 			if ( pSalData->mhDitherPal )
236 			{
237 				hOldPal = SelectPalette( hDC, pSalData->mhDitherPal, TRUE );
238 				RealizePalette( hDC );
239 			}
240 
241 			if( GetDIBits( hDC, rSalBmp.mhDDB, 0, nLines, pBits, pBI, DIB_RGB_COLORS ) == nLines )
242 			{
243 				GlobalUnlock( mhDIB );
244 				maSize = rSalBmp.maSize;
245 				mnBitCount = nNewBitCount;
246 				bRet = TRUE;
247 			}
248 			else
249 			{
250 				GlobalUnlock( mhDIB );
251 				GlobalFree( mhDIB );
252 				mhDIB = 0;
253 			}
254 
255 			if( hOldPal )
256 				SelectPalette( hDC, hOldPal, TRUE );
257 
258 			ReleaseDC( 0, hDC );
259 		}
260 	}
261 
262 	return bRet;
263 }
264 
265 // ------------------------------------------------------------------
266 
267 void WinSalBitmap::Destroy()
268 {
269 	if( mhDIB )
270 		GlobalFree( mhDIB );
271 	else if( mhDDB )
272 		DeleteObject( mhDDB );
273 
274 	maSize = Size();
275 	mnBitCount = 0;
276 }
277 
278 // ------------------------------------------------------------------
279 
280 sal_uInt16 WinSalBitmap::ImplGetDIBColorCount( HGLOBAL hDIB )
281 {
282 	sal_uInt16 nColors = 0;
283 
284 	if( hDIB )
285 	{
286 		PBITMAPINFO 		pBI = (PBITMAPINFO) GlobalLock( hDIB );
287 		PBITMAPINFOHEADER	pBIH = (PBITMAPINFOHEADER) pBI;
288 
289 		if ( pBIH->biSize != sizeof( BITMAPCOREHEADER ) )
290 		{
291 			if( pBIH->biBitCount <= 8 )
292 			{
293 				if ( pBIH->biClrUsed )
294 					nColors = (sal_uInt16) pBIH->biClrUsed;
295 				else
296 					nColors = 1 << pBIH->biBitCount;
297 			}
298 		}
299 		else if( ( (PBITMAPCOREHEADER) pBI )->bcBitCount <= 8 )
300 			nColors = 1 << ( (PBITMAPCOREHEADER) pBI )->bcBitCount;
301 
302 		GlobalUnlock( hDIB );
303 	}
304 
305 	return nColors;
306 }
307 
308 // ------------------------------------------------------------------
309 
310 HGLOBAL WinSalBitmap::ImplCreateDIB( const Size& rSize, sal_uInt16 nBits, const BitmapPalette& rPal )
311 {
312 	DBG_ASSERT( nBits == 1 || nBits == 4 || nBits == 8 || nBits == 16 || nBits == 24, "Unsupported BitCount!" );
313 
314 	HGLOBAL hDIB = 0;
315 
316 	if ( rSize.Width() && rSize.Height() )
317 	{
318 		const sal_uLong 	nImageSize = AlignedWidth4Bytes( nBits * rSize.Width() ) * rSize.Height();
319 		const sal_uInt16	nColors = ( nBits <= 8 ) ? ( 1 << nBits ) : 0;
320 
321 		hDIB = GlobalAlloc( GHND, sizeof( BITMAPINFOHEADER ) + nColors * sizeof( RGBQUAD ) + nImageSize );
322 
323 		if( hDIB )
324 		{
325 			PBITMAPINFO 		pBI = (PBITMAPINFO) GlobalLock( hDIB );
326 			PBITMAPINFOHEADER	pBIH = (PBITMAPINFOHEADER) pBI;
327 
328 			pBIH->biSize = sizeof( BITMAPINFOHEADER );
329 			pBIH->biWidth = rSize.Width();
330 			pBIH->biHeight = rSize.Height();
331 			pBIH->biPlanes = 1;
332 			pBIH->biBitCount = nBits;
333 			pBIH->biCompression = BI_RGB;
334 			pBIH->biSizeImage = nImageSize;
335 			pBIH->biXPelsPerMeter = 0;
336 			pBIH->biYPelsPerMeter = 0;
337 			pBIH->biClrUsed = 0;
338 			pBIH->biClrImportant = 0;
339 
340 			if ( nColors )
341 			{
342 				const sal_uInt16 nMinCount = Min( nColors, rPal.GetEntryCount() );
343 
344 				if( nMinCount )
345 					memcpy( pBI->bmiColors, rPal.ImplGetColorBuffer(), nMinCount * sizeof( RGBQUAD ) );
346 			}
347 
348 			GlobalUnlock( hDIB );
349 		}
350 	}
351 
352 	return hDIB;
353 }
354 
355 // ------------------------------------------------------------------
356 
357 HANDLE WinSalBitmap::ImplCopyDIBOrDDB( HANDLE hHdl, bool bDIB )
358 {
359 	HANDLE	hCopy = 0;
360 
361 	if ( bDIB && hHdl )
362 	{
363 		const sal_uLong nSize = GlobalSize( hHdl );
364 
365 		if ( (hCopy = GlobalAlloc( GHND, nSize  )) != 0 )
366 		{
367 			memcpy( (LPSTR) GlobalLock( hCopy ), (LPSTR) GlobalLock( hHdl ), nSize );
368 
369 			GlobalUnlock( hCopy );
370 			GlobalUnlock( hHdl );
371 		}
372 	}
373 	else if ( hHdl )
374 	{
375 		BITMAP aBmp;
376 
377 		// Source-Bitmap nach Groesse befragen
378 		WIN_GetObject( hHdl, sizeof( BITMAP ), (LPSTR) &aBmp );
379 
380 		// Destination-Bitmap erzeugen
381 		if ( (hCopy = CreateBitmapIndirect( &aBmp )) != 0 )
382 		{
383 			HDC 	hBmpDC = CreateCompatibleDC( 0 );
384 			HBITMAP hBmpOld = (HBITMAP) SelectObject( hBmpDC, hHdl );
385 			HDC 	hCopyDC = CreateCompatibleDC( hBmpDC );
386 			HBITMAP hCopyOld = (HBITMAP) SelectObject( hCopyDC, hCopy );
387 
388 			BitBlt( hCopyDC, 0, 0, aBmp.bmWidth, aBmp.bmHeight, hBmpDC, 0, 0, SRCCOPY );
389 
390 			SelectObject( hCopyDC, hCopyOld );
391 			DeleteDC( hCopyDC );
392 
393 			SelectObject( hBmpDC, hBmpOld );
394 			DeleteDC( hBmpDC );
395 		}
396 	}
397 
398 	return hCopy;
399 }
400 
401 // ------------------------------------------------------------------
402 
403 BitmapBuffer* WinSalBitmap::AcquireBuffer( bool /*bReadOnly*/ )
404 {
405 	BitmapBuffer* pBuffer = NULL;
406 
407 	if( mhDIB )
408 	{
409 		PBITMAPINFO 		pBI = (PBITMAPINFO) GlobalLock( mhDIB );
410 		PBITMAPINFOHEADER	pBIH = (PBITMAPINFOHEADER) pBI;
411 
412 		if( ( pBIH->biCompression == BI_RLE4 ) || ( pBIH->biCompression == BI_RLE8 ) )
413 		{
414 			Size	aSizePix( pBIH->biWidth, pBIH->biHeight );
415 			HGLOBAL hNewDIB = ImplCreateDIB( aSizePix, pBIH->biBitCount, BitmapPalette() );
416 
417 			if( hNewDIB )
418 			{
419 				PBITMAPINFO 		pNewBI = (PBITMAPINFO) GlobalLock( hNewDIB );
420 				PBITMAPINFOHEADER	pNewBIH = (PBITMAPINFOHEADER) pNewBI;
421 				const sal_uInt16		nColorCount = ImplGetDIBColorCount( hNewDIB );
422 				const sal_uLong 		nOffset = *(DWORD*) pBI + nColorCount * sizeof( RGBQUAD );
423 				BYTE*				pOldBits = (PBYTE) pBI + nOffset;
424 				BYTE*				pNewBits = (PBYTE) pNewBI + nOffset;
425 
426 				memcpy( pNewBI, pBI, nOffset );
427 				pNewBIH->biCompression = 0;
428 				ImplDecodeRLEBuffer( pOldBits, pNewBits, aSizePix, pBIH->biCompression == BI_RLE4 );
429 
430 				GlobalUnlock( mhDIB );
431 				GlobalFree( mhDIB );
432 				mhDIB = hNewDIB;
433 				pBI = pNewBI;
434 				pBIH = pNewBIH;
435 			}
436 		}
437 
438 		if( pBIH->biPlanes == 1 )
439 		{
440 			pBuffer = new BitmapBuffer;
441 
442 			pBuffer->mnFormat = BMP_FORMAT_BOTTOM_UP |
443 								( pBIH->biBitCount == 1 ? BMP_FORMAT_1BIT_MSB_PAL :
444 								  pBIH->biBitCount == 4 ? BMP_FORMAT_4BIT_MSN_PAL :
445 								  pBIH->biBitCount == 8 ? BMP_FORMAT_8BIT_PAL :
446 								  pBIH->biBitCount == 16 ? BMP_FORMAT_16BIT_TC_LSB_MASK :
447 								  pBIH->biBitCount == 24 ? BMP_FORMAT_24BIT_TC_BGR :
448 								  pBIH->biBitCount == 32 ? BMP_FORMAT_32BIT_TC_MASK : 0UL );
449 
450 			if( BMP_SCANLINE_FORMAT( pBuffer->mnFormat ) )
451 			{
452 				pBuffer->mnWidth = maSize.Width();
453 				pBuffer->mnHeight = maSize.Height();
454 				pBuffer->mnScanlineSize = AlignedWidth4Bytes( maSize.Width() * pBIH->biBitCount );
455 				pBuffer->mnBitCount = (sal_uInt16) pBIH->biBitCount;
456 
457 				if( pBuffer->mnBitCount <= 8 )
458 				{
459 					const sal_uInt16 nPalCount = ImplGetDIBColorCount( mhDIB );
460 
461 					pBuffer->maPalette.SetEntryCount( nPalCount );
462 					memcpy( pBuffer->maPalette.ImplGetColorBuffer(), pBI->bmiColors, nPalCount * sizeof( RGBQUAD ) );
463 					pBuffer->mpBits = (PBYTE) pBI + *(DWORD*) pBI + nPalCount * sizeof( RGBQUAD );
464 				}
465 				else if( ( pBIH->biBitCount == 16 ) || ( pBIH->biBitCount == 32 ) )
466 				{
467 					sal_uLong nOffset = 0UL;
468 
469 					if( pBIH->biCompression == BI_BITFIELDS )
470 					{
471 						nOffset = 3 * sizeof( RGBQUAD );
472 						pBuffer->maColorMask = ColorMask( *(UINT32*) &pBI->bmiColors[ 0 ],
473 														  *(UINT32*) &pBI->bmiColors[ 1 ],
474 														  *(UINT32*) &pBI->bmiColors[ 2 ] );
475 					}
476 					else if( pBIH->biBitCount == 16 )
477 						pBuffer->maColorMask = ColorMask( 0x00007c00UL, 0x000003e0UL, 0x0000001fUL );
478 					else
479 						pBuffer->maColorMask = ColorMask( 0x00ff0000UL, 0x0000ff00UL, 0x000000ffUL );
480 
481 					pBuffer->mpBits = (PBYTE) pBI + *(DWORD*) pBI + nOffset;
482 				}
483 				else
484 					pBuffer->mpBits = (PBYTE) pBI + *(DWORD*) pBI;
485 			}
486 			else
487 			{
488 				GlobalUnlock( mhDIB );
489 				delete pBuffer;
490 				pBuffer = NULL;
491 			}
492 		}
493 		else
494 			GlobalUnlock( mhDIB );
495 	}
496 
497 	return pBuffer;
498 }
499 
500 // ------------------------------------------------------------------
501 
502 void WinSalBitmap::ReleaseBuffer( BitmapBuffer* pBuffer, bool bReadOnly )
503 {
504 	if( pBuffer )
505 	{
506 		if( mhDIB )
507 		{
508 			if( !bReadOnly && !!pBuffer->maPalette )
509 			{
510 				PBITMAPINFO 	pBI = (PBITMAPINFO) GlobalLock( mhDIB );
511 				const sal_uInt16	nCount = pBuffer->maPalette.GetEntryCount();
512 				const sal_uInt16	nDIBColorCount = ImplGetDIBColorCount( mhDIB );
513 				memcpy( pBI->bmiColors, pBuffer->maPalette.ImplGetColorBuffer(), Min( nDIBColorCount, nCount ) * sizeof( RGBQUAD ) );
514 				GlobalUnlock( mhDIB );
515 			}
516 
517 			GlobalUnlock( mhDIB );
518 		}
519 
520 		delete pBuffer;
521 	}
522 }
523 
524 // ------------------------------------------------------------------
525 
526 void WinSalBitmap::ImplDecodeRLEBuffer( const BYTE* pSrcBuf, BYTE* pDstBuf,
527 									 const Size& rSizePixel, bool bRLE4 )
528 {
529 	HPBYTE			pRLE = (HPBYTE) pSrcBuf;
530 	HPBYTE			pDIB = (HPBYTE) pDstBuf;
531 	HPBYTE			pRow = (HPBYTE) pDstBuf;
532 	sal_uLong			nWidthAl = AlignedWidth4Bytes( rSizePixel.Width() * ( bRLE4 ? 4UL : 8UL ) );
533 	HPBYTE			pLast = pDIB + rSizePixel.Height() * nWidthAl - 1;
534 	sal_uLong			nCountByte;
535 	sal_uLong			nRunByte;
536 	sal_uLong			nX = 0;
537 	sal_uLong			i;
538 	BYTE			cTmp;
539 	bool			bEndDecoding = FALSE;
540 
541 	if( pRLE && pDIB )
542 	{
543 		do
544 		{
545 			if( ( nCountByte = *pRLE++ ) == 0 )
546 			{
547 				nRunByte = *pRLE++;
548 
549 				if( nRunByte > 2UL )
550 				{
551 					if( bRLE4 )
552 					{
553 						nCountByte = nRunByte >> 1UL;
554 
555 						for( i = 0; i < nCountByte; i++ )
556 						{
557 							cTmp = *pRLE++;
558 							ImplSetPixel4( pDIB, nX++, cTmp >> 4 );
559 							ImplSetPixel4( pDIB, nX++, cTmp & 0x0f );
560 						}
561 
562 						if( nRunByte & 1 )
563 							ImplSetPixel4( pDIB, nX++, *pRLE++ >> 4 );
564 
565 						if( ( ( nRunByte + 1 ) >> 1 ) & 1 )
566 							pRLE++;
567 					}
568 					else
569 					{
570 						memcpy( &pDIB[ nX ], pRLE, nRunByte );
571 						pRLE += nRunByte;
572 						nX += nRunByte;
573 
574 						if( nRunByte & 1 )
575 							pRLE++;
576 					}
577 				}
578 				else if( !nRunByte )
579 				{
580 					pDIB = ( pRow += nWidthAl );
581 					nX = 0UL;
582 				}
583 				else if( nRunByte == 1 )
584 					bEndDecoding = TRUE;
585 				else
586 				{
587 					nX += *pRLE++;
588 					pDIB = ( pRow += ( *pRLE++ ) * nWidthAl );
589 				}
590 			}
591 			else
592 			{
593 				cTmp = *pRLE++;
594 
595 				if( bRLE4 )
596 				{
597 					nRunByte = nCountByte >> 1;
598 
599 					for( i = 0; i < nRunByte; i++ )
600 					{
601 						ImplSetPixel4( pDIB, nX++, cTmp >> 4 );
602 						ImplSetPixel4( pDIB, nX++, cTmp & 0x0f );
603 					}
604 
605 					if( nCountByte & 1 )
606 						ImplSetPixel4( pDIB, nX++, cTmp >> 4 );
607 				}
608 				else
609 				{
610 					for( i = 0; i < nCountByte; i++ )
611 						pDIB[ nX++ ] = cTmp;
612 				}
613 			}
614 		}
615 		while( !bEndDecoding && ( pDIB <= pLast ) );
616 	}
617 }
618 
619 bool WinSalBitmap::GetSystemData( BitmapSystemData& rData )
620 {
621     bool bRet = false;
622     if( mhDIB || mhDDB )
623     {
624         bRet = true;
625         rData.pDIB = mhDIB;
626         rData.pDDB = mhDDB;
627         const Size& rSize = GetSize ();
628         rData.mnWidth = rSize.Width();
629         rData.mnHeight = rSize.Height();
630     }
631     return bRet;
632 }
633