Line data Source code
1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /*
3 : * This file is part of the LibreOffice project.
4 : *
5 : * This Source Code Form is subject to the terms of the Mozilla Public
6 : * License, v. 2.0. If a copy of the MPL was not distributed with this
7 : * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 : *
9 : * This file incorporates work covered by the following license notice:
10 : *
11 : * Licensed to the Apache Software Foundation (ASF) under one or more
12 : * contributor license agreements. See the NOTICE file distributed
13 : * with this work for additional information regarding copyright
14 : * ownership. The ASF licenses this file to you under the Apache
15 : * License, Version 2.0 (the "License"); you may not use this file
16 : * except in compliance with the License. You may obtain a copy of
17 : * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 : */
19 :
20 : #include <vcl/bmpacc.hxx>
21 : #include <vcl/salbtype.hxx>
22 : #include <bmpfast.hxx>
23 : #include <osl/diagnose.h>
24 : #include <boost/scoped_array.hpp>
25 :
26 : #define IMPL_CASE_GET_FORMAT( Format ) \
27 : case( BMP_FORMAT##Format ): \
28 : pFncGetPixel = BitmapReadAccess::GetPixelFor##Format; \
29 : break
30 :
31 : #define IMPL_CASE_SET_FORMAT( Format, BitCount ) \
32 : case( BMP_FORMAT##Format ): \
33 : { \
34 : pFncSetPixel = BitmapReadAccess::SetPixelFor##Format; \
35 : pDstBuffer->mnBitCount = BitCount; \
36 : } \
37 : break
38 :
39 : #define DOUBLE_SCANLINES() \
40 : while( ( nActY < nHeight1 ) && ( pMapY[ nActY + 1 ] == nMapY ) ) \
41 : { \
42 : memcpy( pDstScanMap[ nActY + 1L ], pDstScan, rDstBuffer.mnScanlineSize ); \
43 : nActY++; \
44 : }
45 :
46 : #define TC_TO_PAL_COLORS 4096
47 :
48 0 : static long ImplIndexFromColor( const BitmapColor& rCol )
49 : {
50 : #if TC_TO_PAL_COLORS == 4096
51 :
52 0 : return( ( ( (long) rCol.GetBlue() >> 4L) << 8L ) |
53 0 : ( ( (long) rCol.GetGreen() >> 4L ) << 4L ) |
54 0 : ( (long) rCol.GetRed() >> 4L ) );
55 :
56 : #elif TC_TO_PAL_COLORS == 32768
57 :
58 : return( ( ( (long) rCol.GetBlue() >> 3L) << 10L ) |
59 : ( ( (long) rCol.GetGreen() >> 3L ) << 5L ) |
60 : ( (long) rCol.GetRed() >> 3L ) );
61 :
62 : #endif
63 : }
64 :
65 0 : static void ImplPALToPAL( const BitmapBuffer& rSrcBuffer, BitmapBuffer& rDstBuffer,
66 : FncGetPixel pFncGetPixel, FncSetPixel pFncSetPixel,
67 : Scanline* pSrcScanMap, Scanline* pDstScanMap, long* pMapX, long* pMapY )
68 : {
69 0 : const long nWidth = rDstBuffer.mnWidth, nHeight = rDstBuffer.mnHeight, nHeight1 = nHeight - 1;
70 0 : const ColorMask& rSrcMask = rSrcBuffer.maColorMask;
71 0 : const ColorMask& rDstMask = rDstBuffer.maColorMask;
72 0 : BitmapPalette aColMap( rSrcBuffer.maPalette.GetEntryCount() );
73 0 : BitmapColor* pColMapBuf = aColMap.ImplGetColorBuffer();
74 0 : BitmapColor aIndex( 0 );
75 :
76 0 : for( sal_uInt16 i = 0, nSrcCount = aColMap.GetEntryCount(), nDstCount = rDstBuffer.maPalette.GetEntryCount(); i < nSrcCount; i++ )
77 : {
78 0 : if( ( i < nDstCount ) && ( rSrcBuffer.maPalette[ i ] == rDstBuffer.maPalette[ i ] ) )
79 0 : aIndex.SetIndex( sal::static_int_cast<sal_uInt8>(i) );
80 : else
81 0 : aIndex.SetIndex( sal::static_int_cast<sal_uInt8>(rDstBuffer.maPalette.GetBestIndex( rSrcBuffer.maPalette[ i ] )) );
82 :
83 0 : pColMapBuf[ i ] = aIndex;
84 : }
85 :
86 0 : for( long nActY = 0, nMapY; nActY < nHeight; nActY++ )
87 : {
88 0 : Scanline pSrcScan( pSrcScanMap[ nMapY = pMapY[ nActY ] ] ), pDstScan( pDstScanMap[ nActY ] );
89 :
90 0 : for( long nX = 0L; nX < nWidth; nX++ )
91 0 : pFncSetPixel( pDstScan, nX, pColMapBuf[ pFncGetPixel( pSrcScan, pMapX[ nX ], rSrcMask ).GetIndex() ], rDstMask );
92 :
93 0 : DOUBLE_SCANLINES();
94 0 : }
95 0 : }
96 :
97 0 : static void ImplPALToTC( const BitmapBuffer& rSrcBuffer, BitmapBuffer& rDstBuffer,
98 : FncGetPixel pFncGetPixel, FncSetPixel pFncSetPixel,
99 : Scanline* pSrcScanMap, Scanline* pDstScanMap, long* pMapX, long* pMapY )
100 : {
101 0 : const long nWidth = rDstBuffer.mnWidth, nHeight = rDstBuffer.mnHeight, nHeight1 = nHeight - 1;
102 0 : const ColorMask& rSrcMask = rSrcBuffer.maColorMask;
103 0 : const ColorMask& rDstMask = rDstBuffer.maColorMask;
104 0 : const BitmapColor* pColBuf = rSrcBuffer.maPalette.ImplGetColorBuffer();
105 :
106 0 : if( BMP_SCANLINE_FORMAT( rSrcBuffer.mnFormat ) == BMP_FORMAT_1BIT_MSB_PAL )
107 : {
108 0 : const BitmapColor aCol0( pColBuf[ 0 ] );
109 0 : const BitmapColor aCol1( pColBuf[ 1 ] );
110 : long nMapX;
111 :
112 0 : for( long nActY = 0, nMapY; nActY < nHeight; nActY++ )
113 : {
114 0 : Scanline pSrcScan( pSrcScanMap[ nMapY = pMapY[ nActY ] ] ), pDstScan( pDstScanMap[ nActY ] );
115 :
116 0 : for( long nX = 0L; nX < nWidth; )
117 : {
118 0 : nMapX = pMapX[ nX ];
119 : pFncSetPixel( pDstScan, nX++,
120 0 : pSrcScan[ nMapX >> 3 ] & ( 1 << ( 7 - ( nMapX & 7 ) ) ) ? aCol1 : aCol0,
121 0 : rDstMask );
122 : }
123 :
124 0 : DOUBLE_SCANLINES();
125 0 : }
126 : }
127 0 : else if( BMP_SCANLINE_FORMAT( rSrcBuffer.mnFormat ) == BMP_FORMAT_4BIT_MSN_PAL )
128 : {
129 : long nMapX;
130 :
131 0 : for( long nActY = 0, nMapY; nActY < nHeight; nActY++ )
132 : {
133 0 : Scanline pSrcScan( pSrcScanMap[ nMapY = pMapY[ nActY ] ] ), pDstScan( pDstScanMap[ nActY ] );
134 :
135 0 : for( long nX = 0L; nX < nWidth; )
136 : {
137 0 : nMapX = pMapX[ nX ];
138 : pFncSetPixel( pDstScan, nX++,
139 0 : pColBuf[ ( pSrcScan[ nMapX >> 1 ] >> ( nMapX & 1 ? 0 : 4 ) ) & 0x0f ],
140 0 : rDstMask );
141 : }
142 :
143 0 : DOUBLE_SCANLINES();
144 : }
145 : }
146 0 : else if( BMP_SCANLINE_FORMAT( rSrcBuffer.mnFormat ) == BMP_FORMAT_8BIT_PAL )
147 : {
148 0 : for( long nActY = 0, nMapY; nActY < nHeight; nActY++ )
149 : {
150 0 : Scanline pSrcScan( pSrcScanMap[ nMapY = pMapY[ nActY ] ] ), pDstScan( pDstScanMap[ nActY ] );
151 :
152 0 : for( long nX = 0L; nX < nWidth; nX++ )
153 0 : pFncSetPixel( pDstScan, nX, pColBuf[ pSrcScan[ pMapX[ nX ] ] ], rDstMask );
154 :
155 0 : DOUBLE_SCANLINES();
156 : }
157 : }
158 : else
159 : {
160 0 : for( long nActY = 0, nMapY; nActY < nHeight; nActY++ )
161 : {
162 0 : Scanline pSrcScan( pSrcScanMap[ nMapY = pMapY[ nActY ] ] ), pDstScan( pDstScanMap[ nActY ] );
163 :
164 0 : for( long nX = 0L; nX < nWidth; nX++ )
165 0 : pFncSetPixel( pDstScan, nX, pColBuf[ pFncGetPixel( pSrcScan, pMapX[ nX ], rSrcMask ).GetIndex() ], rDstMask );
166 :
167 0 : DOUBLE_SCANLINES();
168 : }
169 : }
170 0 : }
171 :
172 0 : static void ImplTCToTC( const BitmapBuffer& rSrcBuffer, BitmapBuffer& rDstBuffer,
173 : FncGetPixel pFncGetPixel, FncSetPixel pFncSetPixel,
174 : Scanline* pSrcScanMap, Scanline* pDstScanMap, long* pMapX, long* pMapY )
175 : {
176 0 : const long nWidth = rDstBuffer.mnWidth, nHeight = rDstBuffer.mnHeight, nHeight1 = nHeight - 1;
177 0 : const ColorMask& rSrcMask = rSrcBuffer.maColorMask;
178 0 : const ColorMask& rDstMask = rDstBuffer.maColorMask;
179 :
180 0 : if( BMP_SCANLINE_FORMAT( rSrcBuffer.mnFormat ) == BMP_FORMAT_24BIT_TC_BGR )
181 : {
182 0 : BitmapColor aCol;
183 0 : sal_uInt8* pPixel = NULL;
184 :
185 0 : for( long nActY = 0, nMapY; nActY < nHeight; nActY++ )
186 : {
187 0 : Scanline pSrcScan( pSrcScanMap[ nMapY = pMapY[ nActY ] ] ), pDstScan( pDstScanMap[ nActY ] );
188 :
189 0 : for( long nX = 0L; nX < nWidth; nX++ )
190 : {
191 0 : aCol.SetBlue( *( pPixel = ( pSrcScan + pMapX[ nX ] * 3 ) )++ );
192 0 : aCol.SetGreen( *pPixel++ );
193 0 : aCol.SetRed( *pPixel );
194 0 : pFncSetPixel( pDstScan, nX, aCol, rDstMask );
195 : }
196 :
197 0 : DOUBLE_SCANLINES()
198 0 : }
199 : }
200 : else
201 : {
202 0 : for( long nActY = 0, nMapY; nActY < nHeight; nActY++ )
203 : {
204 0 : Scanline pSrcScan( pSrcScanMap[ nMapY = pMapY[ nActY ] ] ), pDstScan( pDstScanMap[ nActY ] );
205 :
206 0 : for( long nX = 0L; nX < nWidth; nX++ )
207 0 : pFncSetPixel( pDstScan, nX, pFncGetPixel( pSrcScan, pMapX[ nX ], rSrcMask ), rDstMask );
208 :
209 0 : DOUBLE_SCANLINES();
210 : }
211 : }
212 0 : }
213 :
214 0 : static void ImplTCToPAL( const BitmapBuffer& rSrcBuffer, BitmapBuffer& rDstBuffer,
215 : FncGetPixel pFncGetPixel, FncSetPixel pFncSetPixel,
216 : Scanline* pSrcScanMap, Scanline* pDstScanMap, long* pMapX, long* pMapY )
217 : {
218 0 : const long nWidth = rDstBuffer.mnWidth, nHeight = rDstBuffer.mnHeight, nHeight1 = nHeight - 1;
219 0 : const ColorMask& rSrcMask = rSrcBuffer.maColorMask;
220 0 : const ColorMask& rDstMask = rDstBuffer.maColorMask;
221 0 : BitmapPalette aColMap( rSrcBuffer.maPalette.GetEntryCount() );
222 0 : boost::scoped_array<sal_uInt8> pColToPalMap(new sal_uInt8[ TC_TO_PAL_COLORS ]);
223 0 : BitmapColor aIndex( 0 );
224 :
225 0 : for( long nR = 0; nR < 16; nR++ )
226 : {
227 0 : for( long nG = 0; nG < 16; nG++ )
228 : {
229 0 : for( long nB = 0; nB < 16; nB++ )
230 : {
231 0 : BitmapColor aCol( sal::static_int_cast<sal_uInt8>(nR << 4),
232 0 : sal::static_int_cast<sal_uInt8>(nG << 4),
233 0 : sal::static_int_cast<sal_uInt8>(nB << 4) );
234 0 : pColToPalMap[ ImplIndexFromColor( aCol ) ] = (sal_uInt8) rDstBuffer.maPalette.GetBestIndex( aCol );
235 0 : }
236 : }
237 : }
238 :
239 0 : for( long nActY = 0, nMapY; nActY < nHeight; nActY++ )
240 : {
241 0 : Scanline pSrcScan( pSrcScanMap[ nMapY = pMapY[ nActY ] ] ), pDstScan( pDstScanMap[ nActY ] );
242 :
243 0 : for( long nX = 0L; nX < nWidth; nX++ )
244 : {
245 0 : aIndex.SetIndex( pColToPalMap[ ImplIndexFromColor( pFncGetPixel( pSrcScan, pMapX[ nX ], rSrcMask ) ) ] );
246 0 : pFncSetPixel( pDstScan, nX, aIndex, rDstMask );
247 : }
248 :
249 0 : DOUBLE_SCANLINES();
250 0 : }
251 0 : }
252 :
253 7 : BitmapBuffer* StretchAndConvert(
254 : const BitmapBuffer& rSrcBuffer, const SalTwoRect& rTwoRect,
255 : sal_uLong nDstBitmapFormat, const BitmapPalette* pDstPal, const ColorMask* pDstMask )
256 : {
257 : FncGetPixel pFncGetPixel;
258 : FncSetPixel pFncSetPixel;
259 7 : BitmapBuffer* pDstBuffer = new BitmapBuffer;
260 : long i;
261 :
262 : // set function for getting pixels
263 7 : switch( BMP_SCANLINE_FORMAT( rSrcBuffer.mnFormat ) )
264 : {
265 0 : IMPL_CASE_GET_FORMAT( _1BIT_MSB_PAL );
266 0 : IMPL_CASE_GET_FORMAT( _1BIT_LSB_PAL );
267 0 : IMPL_CASE_GET_FORMAT( _4BIT_MSN_PAL );
268 0 : IMPL_CASE_GET_FORMAT( _4BIT_LSN_PAL );
269 0 : IMPL_CASE_GET_FORMAT( _8BIT_PAL );
270 0 : IMPL_CASE_GET_FORMAT( _8BIT_TC_MASK );
271 0 : IMPL_CASE_GET_FORMAT( _16BIT_TC_MSB_MASK );
272 0 : IMPL_CASE_GET_FORMAT( _16BIT_TC_LSB_MASK );
273 0 : IMPL_CASE_GET_FORMAT( _24BIT_TC_BGR );
274 0 : IMPL_CASE_GET_FORMAT( _24BIT_TC_RGB );
275 0 : IMPL_CASE_GET_FORMAT( _24BIT_TC_MASK );
276 0 : IMPL_CASE_GET_FORMAT( _32BIT_TC_ABGR );
277 0 : IMPL_CASE_GET_FORMAT( _32BIT_TC_ARGB );
278 7 : IMPL_CASE_GET_FORMAT( _32BIT_TC_BGRA );
279 0 : IMPL_CASE_GET_FORMAT( _32BIT_TC_RGBA );
280 0 : IMPL_CASE_GET_FORMAT( _32BIT_TC_MASK );
281 :
282 : default:
283 : // should never come here
284 : // initialize pFncGetPixel to something valid that is
285 : // least likely to crash
286 0 : pFncGetPixel = BitmapReadAccess::GetPixelFor_1BIT_MSB_PAL;
287 : OSL_FAIL( "unknown read format" );
288 0 : break;
289 : }
290 :
291 : // set function for setting pixels
292 7 : const sal_uLong nDstScanlineFormat = BMP_SCANLINE_FORMAT( nDstBitmapFormat );
293 7 : switch( nDstScanlineFormat )
294 : {
295 0 : IMPL_CASE_SET_FORMAT( _1BIT_MSB_PAL, 1 );
296 0 : IMPL_CASE_SET_FORMAT( _1BIT_LSB_PAL, 1 );
297 0 : IMPL_CASE_SET_FORMAT( _4BIT_MSN_PAL, 1 );
298 0 : IMPL_CASE_SET_FORMAT( _4BIT_LSN_PAL, 4 );
299 0 : IMPL_CASE_SET_FORMAT( _8BIT_PAL, 8 );
300 0 : IMPL_CASE_SET_FORMAT( _8BIT_TC_MASK, 8 );
301 0 : IMPL_CASE_SET_FORMAT( _16BIT_TC_MSB_MASK, 16 );
302 0 : IMPL_CASE_SET_FORMAT( _16BIT_TC_LSB_MASK, 16 );
303 0 : IMPL_CASE_SET_FORMAT( _24BIT_TC_BGR, 24 );
304 0 : IMPL_CASE_SET_FORMAT( _24BIT_TC_RGB, 24 );
305 0 : IMPL_CASE_SET_FORMAT( _24BIT_TC_MASK, 24 );
306 0 : IMPL_CASE_SET_FORMAT( _32BIT_TC_ABGR, 32 );
307 0 : IMPL_CASE_SET_FORMAT( _32BIT_TC_ARGB, 32 );
308 7 : IMPL_CASE_SET_FORMAT( _32BIT_TC_BGRA, 32 );
309 0 : IMPL_CASE_SET_FORMAT( _32BIT_TC_RGBA, 32 );
310 0 : IMPL_CASE_SET_FORMAT( _32BIT_TC_MASK, 32 );
311 :
312 : default:
313 : // should never come here
314 : // initialize pFncSetPixel to something valid that is
315 : // least likely to crash
316 0 : pFncSetPixel = BitmapReadAccess::SetPixelFor_1BIT_MSB_PAL;
317 0 : pDstBuffer->mnBitCount = 1;
318 : OSL_FAIL( "unknown write format" );
319 0 : break;
320 : }
321 :
322 : // fill destination buffer
323 7 : pDstBuffer->mnFormat = nDstBitmapFormat;
324 7 : pDstBuffer->mnWidth = rTwoRect.mnDestWidth;
325 7 : pDstBuffer->mnHeight = rTwoRect.mnDestHeight;
326 7 : pDstBuffer->mnScanlineSize = AlignedWidth4Bytes( pDstBuffer->mnBitCount * pDstBuffer->mnWidth );
327 : try
328 : {
329 7 : pDstBuffer->mpBits = new sal_uInt8[ pDstBuffer->mnScanlineSize * pDstBuffer->mnHeight ];
330 : }
331 0 : catch( const std::bad_alloc& )
332 : {
333 : // memory exception, clean up
334 0 : pDstBuffer->mpBits = NULL;
335 0 : delete pDstBuffer;
336 0 : return NULL;
337 : }
338 :
339 : // do we need a destination palette or color mask?
340 7 : if( ( nDstScanlineFormat == BMP_FORMAT_1BIT_MSB_PAL ) ||
341 7 : ( nDstScanlineFormat == BMP_FORMAT_1BIT_LSB_PAL ) ||
342 7 : ( nDstScanlineFormat == BMP_FORMAT_4BIT_MSN_PAL ) ||
343 7 : ( nDstScanlineFormat == BMP_FORMAT_4BIT_LSN_PAL ) ||
344 : ( nDstScanlineFormat == BMP_FORMAT_8BIT_PAL ) )
345 : {
346 : assert(pDstPal && "destination buffer requires palette");
347 0 : if (!pDstPal)
348 : {
349 0 : delete pDstBuffer;
350 0 : return NULL;
351 : }
352 0 : pDstBuffer->maPalette = *pDstPal;
353 : }
354 7 : else if( ( nDstScanlineFormat == BMP_FORMAT_8BIT_TC_MASK ) ||
355 7 : ( nDstScanlineFormat == BMP_FORMAT_16BIT_TC_MSB_MASK ) ||
356 7 : ( nDstScanlineFormat == BMP_FORMAT_16BIT_TC_LSB_MASK ) ||
357 7 : ( nDstScanlineFormat == BMP_FORMAT_24BIT_TC_MASK ) ||
358 : ( nDstScanlineFormat == BMP_FORMAT_32BIT_TC_MASK ) )
359 : {
360 : assert(pDstMask && "destination buffer requires color mask");
361 0 : if (!pDstMask)
362 : {
363 0 : delete pDstBuffer;
364 0 : return NULL;
365 : }
366 0 : pDstBuffer->maColorMask = *pDstMask;
367 : }
368 :
369 : // short circuit the most important conversions
370 7 : bool bFastConvert = ImplFastBitmapConversion( *pDstBuffer, rSrcBuffer, rTwoRect );
371 7 : if( bFastConvert )
372 7 : return pDstBuffer;
373 :
374 0 : const long nSrcX = rTwoRect.mnSrcX, nSrcY = rTwoRect.mnSrcY;
375 0 : const long nSrcDX = rTwoRect.mnSrcWidth, nSrcDY = rTwoRect.mnSrcHeight;
376 0 : const long nDstDX = rTwoRect.mnDestWidth, nDstDY = rTwoRect.mnDestHeight;
377 0 : Scanline* pSrcScan = NULL;
378 0 : Scanline* pDstScan = NULL;
379 0 : long* pMapX = NULL;
380 0 : long* pMapY = NULL;
381 : long nTmp, nOffset;
382 :
383 : try
384 : {
385 0 : pSrcScan = new Scanline[ rSrcBuffer.mnHeight ];
386 0 : pDstScan = new Scanline[ nDstDY ];
387 0 : pMapX = new long[ nDstDX ];
388 0 : pMapY = new long[ nDstDY ];
389 : }
390 0 : catch( const std::bad_alloc& )
391 : {
392 : // memory exception, clean up
393 : // remark: the buffer ptr causing the exception
394 : // is still NULL here
395 0 : delete[] pSrcScan;
396 0 : delete[] pDstScan;
397 0 : delete[] pMapX;
398 0 : delete[] pMapY;
399 0 : delete pDstBuffer;
400 0 : return NULL;
401 : }
402 :
403 : // horizontal mapping table
404 0 : if( (nDstDX != nSrcDX) && (nDstDX != 0) )
405 : {
406 0 : const double fFactorX = (double)nSrcDX / nDstDX;
407 :
408 0 : for( i = 0L; i < nDstDX; i++ )
409 0 : pMapX[ i ] = nSrcX + static_cast<int>( i * fFactorX );
410 : }
411 : else
412 : {
413 0 : for( i = 0L, nTmp = nSrcX; i < nDstDX; i++ )
414 0 : pMapX[ i ] = nTmp++;
415 : }
416 :
417 : // vertical mapping table
418 0 : if( (nDstDY != nSrcDY) && (nDstDY != 0) )
419 : {
420 0 : const double fFactorY = (double)nSrcDY / nDstDY;
421 :
422 0 : for( i = 0L; i < nDstDY; i++ )
423 0 : pMapY[ i ] = nSrcY + static_cast<int>( i * fFactorY );
424 : }
425 : else
426 : {
427 0 : for( i = 0L, nTmp = nSrcY; i < nDstDY; i++ )
428 0 : pMapY[ i ] = nTmp++;
429 : }
430 :
431 : // source scanline buffer
432 : Scanline pTmpScan;
433 0 : if( BMP_SCANLINE_ADJUSTMENT( rSrcBuffer.mnFormat ) == BMP_FORMAT_TOP_DOWN )
434 0 : pTmpScan = rSrcBuffer.mpBits, nOffset = rSrcBuffer.mnScanlineSize;
435 : else
436 : {
437 0 : pTmpScan = rSrcBuffer.mpBits + ( rSrcBuffer.mnHeight - 1 ) * rSrcBuffer.mnScanlineSize;
438 0 : nOffset = -rSrcBuffer.mnScanlineSize;
439 : }
440 :
441 0 : for( i = 0L; i < rSrcBuffer.mnHeight; i++, pTmpScan += nOffset )
442 0 : pSrcScan[ i ] = pTmpScan;
443 :
444 : // destination scanline buffer
445 0 : if( BMP_SCANLINE_ADJUSTMENT( pDstBuffer->mnFormat ) == BMP_FORMAT_TOP_DOWN )
446 0 : pTmpScan = pDstBuffer->mpBits, nOffset = pDstBuffer->mnScanlineSize;
447 : else
448 : {
449 0 : pTmpScan = pDstBuffer->mpBits + ( nDstDY - 1 ) * pDstBuffer->mnScanlineSize;
450 0 : nOffset = -pDstBuffer->mnScanlineSize;
451 : }
452 :
453 0 : for( i = 0L; i < nDstDY; i++, pTmpScan += nOffset )
454 0 : pDstScan[ i ] = pTmpScan;
455 :
456 : // do buffer scaling and conversion
457 0 : if( rSrcBuffer.mnBitCount <= 8 && pDstBuffer->mnBitCount <= 8 )
458 : {
459 : ImplPALToPAL( rSrcBuffer, *pDstBuffer, pFncGetPixel, pFncSetPixel,
460 0 : pSrcScan, pDstScan, pMapX, pMapY );
461 : }
462 0 : else if( rSrcBuffer.mnBitCount <= 8 && pDstBuffer->mnBitCount > 8 )
463 : {
464 : ImplPALToTC( rSrcBuffer, *pDstBuffer, pFncGetPixel, pFncSetPixel,
465 0 : pSrcScan, pDstScan, pMapX, pMapY );
466 : }
467 0 : else if( rSrcBuffer.mnBitCount > 8 && pDstBuffer->mnBitCount > 8 )
468 : {
469 : ImplTCToTC( rSrcBuffer, *pDstBuffer, pFncGetPixel, pFncSetPixel,
470 0 : pSrcScan, pDstScan, pMapX, pMapY );
471 : }
472 : else
473 : {
474 : ImplTCToPAL( rSrcBuffer, *pDstBuffer, pFncGetPixel, pFncSetPixel,
475 0 : pSrcScan, pDstScan, pMapX, pMapY );
476 : }
477 :
478 : // cleanup
479 0 : delete[] pSrcScan;
480 0 : delete[] pDstScan;
481 0 : delete[] pMapX;
482 0 : delete[] pMapY;
483 :
484 0 : return pDstBuffer;
485 : }
486 :
487 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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