1 /************************************************************** 2 * 3 * Licensed to the Apache Software Foundation (ASF) under one 4 * or more contributor license agreements. See the NOTICE file 5 * distributed with this work for additional information 6 * regarding copyright ownership. The ASF licenses this file 7 * to you under the Apache License, Version 2.0 (the 8 * "License"); you may not use this file except in compliance 9 * with the License. You may obtain a copy of the License at 10 * 11 * http://www.apache.org/licenses/LICENSE-2.0 12 * 13 * Unless required by applicable law or agreed to in writing, 14 * software distributed under the License is distributed on an 15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16 * KIND, either express or implied. See the License for the 17 * specific language governing permissions and limitations 18 * under the License. 19 * 20 *************************************************************/ 21 22 // MARKER(update_precomp.py): autogen include statement, do not remove 23 #include "precompiled_vcl.hxx" 24 25 #include <vcl/salbtype.hxx> 26 #include <vcl/dibtools.hxx> 27 #include <tools/zcodec.hxx> 28 #include <tools/stream.hxx> 29 #include <vcl/bitmapex.hxx> 30 #include <vcl/bmpacc.hxx> 31 #include <vcl/outdev.hxx> 32 33 ////////////////////////////////////////////////////////////////////////////// 34 // - Defines - 35 36 #define DIBCOREHEADERSIZE ( 12UL ) 37 #define DIBINFOHEADERSIZE ( sizeof(DIBInfoHeader) ) 38 #define DIBV5HEADERSIZE ( sizeof(DIBV5Header) ) 39 40 ////////////////////////////////////////////////////////////////////////////// 41 // - Compression defines 42 43 #define COMPRESS_OWN ('S'|('D'<<8UL)) 44 #define COMPRESS_NONE ( 0UL ) 45 #define RLE_8 ( 1UL ) 46 #define RLE_4 ( 2UL ) 47 #define BITFIELDS ( 3UL ) 48 #define ZCOMPRESS ( COMPRESS_OWN | 0x01000000UL ) /* == 'SD01' (binary) */ 49 50 ////////////////////////////////////////////////////////////////////////////// 51 // - DIBInfoHeader and DIBV5Header 52 53 typedef sal_Int32 FXPT2DOT30; 54 55 struct CIEXYZ 56 { 57 FXPT2DOT30 aXyzX; 58 FXPT2DOT30 aXyzY; 59 FXPT2DOT30 aXyzZ; 60 61 CIEXYZ() 62 : aXyzX(0L), 63 aXyzY(0L), 64 aXyzZ(0L) 65 {} 66 67 ~CIEXYZ() 68 {} 69 }; 70 71 struct CIEXYZTriple 72 { 73 CIEXYZ aXyzRed; 74 CIEXYZ aXyzGreen; 75 CIEXYZ aXyzBlue; 76 77 CIEXYZTriple() 78 : aXyzRed(), 79 aXyzGreen(), 80 aXyzBlue() 81 {} 82 83 ~CIEXYZTriple() 84 {} 85 }; 86 87 struct DIBInfoHeader 88 { 89 sal_uInt32 nSize; 90 sal_Int32 nWidth; 91 sal_Int32 nHeight; 92 sal_uInt16 nPlanes; 93 sal_uInt16 nBitCount; 94 sal_uInt32 nCompression; 95 sal_uInt32 nSizeImage; 96 sal_Int32 nXPelsPerMeter; 97 sal_Int32 nYPelsPerMeter; 98 sal_uInt32 nColsUsed; 99 sal_uInt32 nColsImportant; 100 101 DIBInfoHeader() 102 : nSize(0UL), 103 nWidth(0UL), 104 nHeight(0UL), 105 nPlanes(0), 106 nBitCount(0), 107 nCompression(0), 108 nSizeImage(0), 109 nXPelsPerMeter(0UL), 110 nYPelsPerMeter(0UL), 111 nColsUsed(0UL), 112 nColsImportant(0UL) 113 {} 114 115 ~DIBInfoHeader() 116 {} 117 }; 118 119 struct DIBV5Header : public DIBInfoHeader 120 { 121 sal_uInt32 nV5RedMask; 122 sal_uInt32 nV5GreenMask; 123 sal_uInt32 nV5BlueMask; 124 sal_uInt32 nV5AlphaMask; 125 sal_uInt32 nV5CSType; 126 CIEXYZTriple aV5Endpoints; 127 sal_uInt32 nV5GammaRed; 128 sal_uInt32 nV5GammaGreen; 129 sal_uInt32 nV5GammaBlue; 130 sal_uInt32 nV5Intent; 131 sal_uInt32 nV5ProfileData; 132 sal_uInt32 nV5ProfileSize; 133 sal_uInt32 nV5Reserved; 134 135 DIBV5Header() 136 : DIBInfoHeader(), 137 nV5RedMask(0UL), 138 nV5GreenMask(0UL), 139 nV5BlueMask(0UL), 140 nV5AlphaMask(0UL), 141 nV5CSType(0UL), 142 aV5Endpoints(), 143 nV5GammaRed(0UL), 144 nV5GammaGreen(0UL), 145 nV5GammaBlue(0UL), 146 nV5Intent(0UL), 147 nV5ProfileData(0UL), 148 nV5ProfileSize(0UL), 149 nV5Reserved(0UL) 150 {} 151 152 ~DIBV5Header() 153 {} 154 }; 155 156 ////////////////////////////////////////////////////////////////////////////// 157 158 namespace 159 { 160 inline sal_uInt16 discretizeBitcount( sal_uInt16 nInputCount ) 161 { 162 return ( nInputCount <= 1 ) ? 1 : 163 ( nInputCount <= 4 ) ? 4 : 164 ( nInputCount <= 8 ) ? 8 : 24; 165 } 166 167 inline bool isBitfieldCompression( sal_uLong nScanlineFormat ) 168 { 169 return (BMP_FORMAT_16BIT_TC_LSB_MASK == nScanlineFormat) || (BMP_FORMAT_32BIT_TC_MASK == nScanlineFormat); 170 } 171 } 172 173 ////////////////////////////////////////////////////////////////////////////// 174 175 bool ImplReadDIBInfoHeader(SvStream& rIStm, DIBV5Header& rHeader, bool& bTopDown) 176 { 177 // BITMAPINFOHEADER or BITMAPCOREHEADER or BITMAPV5HEADER 178 const sal_Size aStartPos(rIStm.Tell()); 179 rIStm >> rHeader.nSize; 180 181 // BITMAPCOREHEADER 182 if ( rHeader.nSize == DIBCOREHEADERSIZE ) 183 { 184 sal_Int16 nTmp16; 185 186 rIStm >> nTmp16; rHeader.nWidth = nTmp16; 187 rIStm >> nTmp16; rHeader.nHeight = nTmp16; 188 rIStm >> rHeader.nPlanes; 189 rIStm >> rHeader.nBitCount; 190 } 191 else 192 { 193 // BITMAPCOREHEADER, BITMAPV5HEADER or unknown. Read as far as possible 194 sal_Size nUsed(sizeof(rHeader.nSize)); 195 196 // read DIBInfoHeader entries 197 if(nUsed < rHeader.nSize) { rIStm >> rHeader.nWidth; nUsed += sizeof(rHeader.nWidth); } 198 if(nUsed < rHeader.nSize) { rIStm >> rHeader.nHeight; nUsed += sizeof(rHeader.nHeight); } 199 if(nUsed < rHeader.nSize) { rIStm >> rHeader.nPlanes; nUsed += sizeof(rHeader.nPlanes); } 200 if(nUsed < rHeader.nSize) { rIStm >> rHeader.nBitCount; nUsed += sizeof(rHeader.nBitCount); } 201 if(nUsed < rHeader.nSize) { rIStm >> rHeader.nCompression; nUsed += sizeof(rHeader.nCompression); } 202 if(nUsed < rHeader.nSize) { rIStm >> rHeader.nSizeImage; nUsed += sizeof(rHeader.nSizeImage); } 203 if(nUsed < rHeader.nSize) { rIStm >> rHeader.nXPelsPerMeter; nUsed += sizeof(rHeader.nXPelsPerMeter); } 204 if(nUsed < rHeader.nSize) { rIStm >> rHeader.nYPelsPerMeter; nUsed += sizeof(rHeader.nYPelsPerMeter); } 205 if(nUsed < rHeader.nSize) { rIStm >> rHeader.nColsUsed; nUsed += sizeof(rHeader.nColsUsed); } 206 if(nUsed < rHeader.nSize) { rIStm >> rHeader.nColsImportant; nUsed += sizeof(rHeader.nColsImportant); } 207 208 // read DIBV5HEADER members 209 if(nUsed < rHeader.nSize) { rIStm >> rHeader.nV5RedMask; nUsed += sizeof(rHeader.nV5RedMask); } 210 if(nUsed < rHeader.nSize) { rIStm >> rHeader.nV5GreenMask; nUsed += sizeof(rHeader.nV5GreenMask); } 211 if(nUsed < rHeader.nSize) { rIStm >> rHeader.nV5BlueMask; nUsed += sizeof(rHeader.nV5BlueMask); } 212 if(nUsed < rHeader.nSize) { rIStm >> rHeader.nV5AlphaMask; nUsed += sizeof(rHeader.nV5AlphaMask); } 213 if(nUsed < rHeader.nSize) { rIStm >> rHeader.nV5CSType; nUsed += sizeof(rHeader.nV5CSType); } 214 215 // read contained CIEXYZTriple's 216 if(nUsed < rHeader.nSize) { rIStm >> rHeader.aV5Endpoints.aXyzRed.aXyzX; nUsed += sizeof(rHeader.aV5Endpoints.aXyzRed.aXyzX); } 217 if(nUsed < rHeader.nSize) { rIStm >> rHeader.aV5Endpoints.aXyzRed.aXyzY; nUsed += sizeof(rHeader.aV5Endpoints.aXyzRed.aXyzY); } 218 if(nUsed < rHeader.nSize) { rIStm >> rHeader.aV5Endpoints.aXyzRed.aXyzZ; nUsed += sizeof(rHeader.aV5Endpoints.aXyzRed.aXyzZ); } 219 if(nUsed < rHeader.nSize) { rIStm >> rHeader.aV5Endpoints.aXyzGreen.aXyzX; nUsed += sizeof(rHeader.aV5Endpoints.aXyzGreen.aXyzX); } 220 if(nUsed < rHeader.nSize) { rIStm >> rHeader.aV5Endpoints.aXyzGreen.aXyzY; nUsed += sizeof(rHeader.aV5Endpoints.aXyzGreen.aXyzY); } 221 if(nUsed < rHeader.nSize) { rIStm >> rHeader.aV5Endpoints.aXyzGreen.aXyzZ; nUsed += sizeof(rHeader.aV5Endpoints.aXyzGreen.aXyzZ); } 222 if(nUsed < rHeader.nSize) { rIStm >> rHeader.aV5Endpoints.aXyzBlue.aXyzX; nUsed += sizeof(rHeader.aV5Endpoints.aXyzBlue.aXyzX); } 223 if(nUsed < rHeader.nSize) { rIStm >> rHeader.aV5Endpoints.aXyzBlue.aXyzY; nUsed += sizeof(rHeader.aV5Endpoints.aXyzBlue.aXyzY); } 224 if(nUsed < rHeader.nSize) { rIStm >> rHeader.aV5Endpoints.aXyzBlue.aXyzZ; nUsed += sizeof(rHeader.aV5Endpoints.aXyzBlue.aXyzZ); } 225 226 if(nUsed < rHeader.nSize) { rIStm >> rHeader.nV5GammaRed; nUsed += sizeof(rHeader.nV5GammaRed); } 227 if(nUsed < rHeader.nSize) { rIStm >> rHeader.nV5GammaGreen; nUsed += sizeof(rHeader.nV5GammaGreen); } 228 if(nUsed < rHeader.nSize) { rIStm >> rHeader.nV5GammaBlue; nUsed += sizeof(rHeader.nV5GammaBlue); } 229 if(nUsed < rHeader.nSize) { rIStm >> rHeader.nV5Intent; nUsed += sizeof(rHeader.nV5Intent); } 230 if(nUsed < rHeader.nSize) { rIStm >> rHeader.nV5ProfileData; nUsed += sizeof(rHeader.nV5ProfileData); } 231 if(nUsed < rHeader.nSize) { rIStm >> rHeader.nV5ProfileSize; nUsed += sizeof(rHeader.nV5ProfileSize); } 232 if(nUsed < rHeader.nSize) { rIStm >> rHeader.nV5Reserved; nUsed += sizeof(rHeader.nV5Reserved); } 233 234 // seek to EndPos 235 rIStm.Seek(aStartPos + rHeader.nSize); 236 } 237 238 if ( rHeader.nHeight < 0 ) 239 { 240 bTopDown = true; 241 rHeader.nHeight *= -1; 242 } 243 else 244 { 245 bTopDown = false; 246 } 247 248 if ( rHeader.nWidth < 0 ) 249 { 250 rIStm.SetError( SVSTREAM_FILEFORMAT_ERROR ); 251 } 252 253 // #144105# protect a little against damaged files 254 if( rHeader.nSizeImage > ( 16 * static_cast< sal_uInt32 >( rHeader.nWidth * rHeader.nHeight ) ) ) 255 { 256 rHeader.nSizeImage = 0; 257 } 258 259 return( ( rHeader.nPlanes == 1 ) && ( rIStm.GetError() == 0UL ) ); 260 } 261 262 bool ImplReadDIBPalette( SvStream& rIStm, BitmapWriteAccess& rAcc, bool bQuad ) 263 { 264 const sal_uInt16 nColors = rAcc.GetPaletteEntryCount(); 265 const sal_uLong nPalSize = nColors * ( bQuad ? 4UL : 3UL ); 266 BitmapColor aPalColor; 267 268 sal_uInt8* pEntries = new sal_uInt8[ nPalSize ]; 269 rIStm.Read( pEntries, nPalSize ); 270 271 sal_uInt8* pTmpEntry = pEntries; 272 for( sal_uInt16 i = 0; i < nColors; i++ ) 273 { 274 aPalColor.SetBlue( *pTmpEntry++ ); 275 aPalColor.SetGreen( *pTmpEntry++ ); 276 aPalColor.SetRed( *pTmpEntry++ ); 277 278 if( bQuad ) 279 pTmpEntry++; 280 281 rAcc.SetPaletteColor( i, aPalColor ); 282 } 283 284 delete[] pEntries; 285 286 return( rIStm.GetError() == 0UL ); 287 } 288 289 void ImplDecodeRLE( sal_uInt8* pBuffer, DIBV5Header& rHeader, BitmapWriteAccess& rAcc, bool bRLE4 ) 290 { 291 Scanline pRLE = pBuffer; 292 long nY = rHeader.nHeight - 1L; 293 const sal_uLong nWidth = rAcc.Width(); 294 sal_uLong nCountByte; 295 sal_uLong nRunByte; 296 sal_uLong nX = 0UL; 297 sal_uInt8 cTmp; 298 bool bEndDecoding = false; 299 300 do 301 { 302 if( ( nCountByte = *pRLE++ ) == 0 ) 303 { 304 nRunByte = *pRLE++; 305 306 if( nRunByte > 2 ) 307 { 308 if( bRLE4 ) 309 { 310 nCountByte = nRunByte >> 1; 311 312 for( sal_uLong i = 0UL; i < nCountByte; i++ ) 313 { 314 cTmp = *pRLE++; 315 316 if( nX < nWidth ) 317 rAcc.SetPixelIndex( nY, nX++, cTmp >> 4 ); 318 319 if( nX < nWidth ) 320 rAcc.SetPixelIndex( nY, nX++, cTmp & 0x0f ); 321 } 322 323 if( nRunByte & 1 ) 324 { 325 if( nX < nWidth ) 326 rAcc.SetPixelIndex( nY, nX++, *pRLE >> 4 ); 327 328 pRLE++; 329 } 330 331 if( ( ( nRunByte + 1 ) >> 1 ) & 1 ) 332 pRLE++; 333 } 334 else 335 { 336 for( sal_uLong i = 0UL; i < nRunByte; i++ ) 337 { 338 if( nX < nWidth ) 339 rAcc.SetPixelIndex( nY, nX++, *pRLE ); 340 341 pRLE++; 342 } 343 344 if( nRunByte & 1 ) 345 pRLE++; 346 } 347 } 348 else if( !nRunByte ) 349 { 350 nY--; 351 nX = 0UL; 352 } 353 else if( nRunByte == 1 ) 354 bEndDecoding = true; 355 else 356 { 357 nX += *pRLE++; 358 nY -= *pRLE++; 359 } 360 } 361 else 362 { 363 cTmp = *pRLE++; 364 365 if( bRLE4 ) 366 { 367 nRunByte = nCountByte >> 1; 368 369 for( sal_uLong i = 0UL; i < nRunByte; i++ ) 370 { 371 if( nX < nWidth ) 372 rAcc.SetPixelIndex( nY, nX++, cTmp >> 4 ); 373 374 if( nX < nWidth ) 375 rAcc.SetPixelIndex( nY, nX++, cTmp & 0x0f ); 376 } 377 378 if( ( nCountByte & 1 ) && ( nX < nWidth ) ) 379 rAcc.SetPixelIndex( nY, nX++, cTmp >> 4 ); 380 } 381 else 382 { 383 for( sal_uLong i = 0UL; ( i < nCountByte ) && ( nX < nWidth ); i++ ) 384 rAcc.SetPixelIndex( nY, nX++, cTmp ); 385 } 386 } 387 } 388 while ( !bEndDecoding && ( nY >= 0L ) ); 389 } 390 391 bool ImplReadDIBBits(SvStream& rIStm, DIBV5Header& rHeader, BitmapWriteAccess& rAcc, BitmapWriteAccess* pAccAlpha, bool bTopDown, bool& rAlphaUsed) 392 { 393 const sal_uLong nAlignedWidth = AlignedWidth4Bytes(rHeader.nWidth * rHeader.nBitCount); 394 sal_uInt32 nRMask(( rHeader.nBitCount == 16 ) ? 0x00007c00UL : 0x00ff0000UL); 395 sal_uInt32 nGMask(( rHeader.nBitCount == 16 ) ? 0x000003e0UL : 0x0000ff00UL); 396 sal_uInt32 nBMask(( rHeader.nBitCount == 16 ) ? 0x0000001fUL : 0x000000ffUL); 397 bool bNative(false); 398 bool bTCMask(!pAccAlpha && ((16 == rHeader.nBitCount) || (32 == rHeader.nBitCount))); 399 bool bRLE((RLE_8 == rHeader.nCompression && 8 == rHeader.nBitCount) || (RLE_4 == rHeader.nCompression && 4 == rHeader.nBitCount)); 400 401 // Is native format? 402 switch(rAcc.GetScanlineFormat()) 403 { 404 case( BMP_FORMAT_1BIT_MSB_PAL ): 405 case( BMP_FORMAT_4BIT_MSN_PAL ): 406 case( BMP_FORMAT_8BIT_PAL ): 407 case( BMP_FORMAT_24BIT_TC_BGR ): 408 { 409 bNative = ( ( static_cast< bool >(rAcc.IsBottomUp()) != bTopDown ) && !bRLE && !bTCMask && ( rAcc.GetScanlineSize() == nAlignedWidth ) ); 410 break; 411 } 412 413 default: 414 { 415 break; 416 } 417 } 418 419 // Read data 420 if(bNative) 421 { 422 // true color DIB's can have a (optimization) palette 423 if(rHeader.nColsUsed && 8 < rHeader.nBitCount) 424 { 425 rIStm.SeekRel(rHeader.nColsUsed * ((rHeader.nSize != DIBCOREHEADERSIZE ) ? 4 : 3)); 426 } 427 428 rIStm.Read(rAcc.GetBuffer(), rHeader.nHeight * nAlignedWidth); 429 } 430 else 431 { 432 // Read color mask 433 if(bTCMask && BITFIELDS == rHeader.nCompression) 434 { 435 rIStm.SeekRel( -12L ); 436 rIStm >> nRMask; 437 rIStm >> nGMask; 438 rIStm >> nBMask; 439 } 440 441 if(bRLE) 442 { 443 if(!rHeader.nSizeImage) 444 { 445 const sal_uLong nOldPos(rIStm.Tell()); 446 447 rIStm.Seek(STREAM_SEEK_TO_END); 448 rHeader.nSizeImage = rIStm.Tell() - nOldPos; 449 rIStm.Seek(nOldPos); 450 } 451 452 sal_uInt8* pBuffer = (sal_uInt8*)rtl_allocateMemory(rHeader.nSizeImage); 453 rIStm.Read((char*)pBuffer, rHeader.nSizeImage); 454 ImplDecodeRLE(pBuffer, rHeader, rAcc, RLE_4 == rHeader.nCompression); 455 rtl_freeMemory(pBuffer); 456 } 457 else 458 { 459 const long nWidth(rHeader.nWidth); 460 const long nHeight(rHeader.nHeight); 461 sal_uInt8* pBuf = new sal_uInt8[nAlignedWidth]; 462 463 // true color DIB's can have a (optimization) palette 464 if(rHeader.nColsUsed && 8 < rHeader.nBitCount) 465 { 466 rIStm.SeekRel(rHeader.nColsUsed * ((rHeader.nSize != DIBCOREHEADERSIZE ) ? 4 : 3)); 467 } 468 469 const long nI(bTopDown ? 1 : -1); 470 long nY(bTopDown ? 0 : nHeight - 1); 471 long nCount(nHeight); 472 473 switch(rHeader.nBitCount) 474 { 475 case( 1 ): 476 { 477 sal_uInt8* pTmp; 478 sal_uInt8 cTmp; 479 480 for( ; nCount--; nY += nI ) 481 { 482 rIStm.Read( pTmp = pBuf, nAlignedWidth ); 483 cTmp = *pTmp++; 484 485 for( long nX = 0L, nShift = 8L; nX < nWidth; nX++ ) 486 { 487 if( !nShift ) 488 { 489 nShift = 8L, 490 cTmp = *pTmp++; 491 } 492 493 rAcc.SetPixelIndex( nY, nX, (cTmp >> --nShift) & 1); 494 } 495 } 496 } 497 break; 498 499 case( 4 ): 500 { 501 sal_uInt8* pTmp; 502 sal_uInt8 cTmp; 503 504 for( ; nCount--; nY += nI ) 505 { 506 rIStm.Read( pTmp = pBuf, nAlignedWidth ); 507 cTmp = *pTmp++; 508 509 for( long nX = 0L, nShift = 2L; nX < nWidth; nX++ ) 510 { 511 if( !nShift ) 512 { 513 nShift = 2UL, 514 cTmp = *pTmp++; 515 } 516 517 rAcc.SetPixelIndex( nY, nX, (cTmp >> ( --nShift << 2UL ) ) & 0x0f); 518 } 519 } 520 } 521 break; 522 523 case( 8 ): 524 { 525 sal_uInt8* pTmp; 526 527 for( ; nCount--; nY += nI ) 528 { 529 rIStm.Read( pTmp = pBuf, nAlignedWidth ); 530 531 for( long nX = 0L; nX < nWidth; nX++ ) 532 rAcc.SetPixelIndex( nY, nX, *pTmp++ ); 533 } 534 } 535 break; 536 537 case( 16 ): 538 { 539 ColorMask aMask( nRMask, nGMask, nBMask ); 540 BitmapColor aColor; 541 sal_uInt16* pTmp16; 542 543 for( ; nCount--; nY += nI ) 544 { 545 rIStm.Read( (char*)( pTmp16 = (sal_uInt16*) pBuf ), nAlignedWidth ); 546 547 for( long nX = 0L; nX < nWidth; nX++ ) 548 { 549 aMask.GetColorFor16BitLSB( aColor, (sal_uInt8*) pTmp16++ ); 550 rAcc.SetPixel( nY, nX, aColor ); 551 } 552 } 553 } 554 break; 555 556 case( 24 ): 557 { 558 BitmapColor aPixelColor; 559 sal_uInt8* pTmp; 560 561 for( ; nCount--; nY += nI ) 562 { 563 rIStm.Read( pTmp = pBuf, nAlignedWidth ); 564 565 for( long nX = 0L; nX < nWidth; nX++ ) 566 { 567 aPixelColor.SetBlue( *pTmp++ ); 568 aPixelColor.SetGreen( *pTmp++ ); 569 aPixelColor.SetRed( *pTmp++ ); 570 rAcc.SetPixel( nY, nX, aPixelColor ); 571 } 572 } 573 } 574 break; 575 576 case( 32 ): 577 { 578 ColorMask aMask(nRMask, nGMask, nBMask); 579 BitmapColor aColor; 580 sal_uInt32* pTmp32; 581 582 if(pAccAlpha) 583 { 584 sal_uInt8 aAlpha; 585 586 for( ; nCount--; nY += nI ) 587 { 588 rIStm.Read( (char*)( pTmp32 = (sal_uInt32*) pBuf ), nAlignedWidth ); 589 590 for( long nX = 0L; nX < nWidth; nX++ ) 591 { 592 aMask.GetColorAndAlphaFor32Bit( aColor, aAlpha, (sal_uInt8*) pTmp32++ ); 593 rAcc.SetPixel( nY, nX, aColor ); 594 pAccAlpha->SetPixelIndex(nY, nX, sal_uInt8(0xff) - aAlpha); 595 rAlphaUsed |= bool(0xff != aAlpha); 596 } 597 } 598 } 599 else 600 { 601 for( ; nCount--; nY += nI ) 602 { 603 rIStm.Read( (char*)( pTmp32 = (sal_uInt32*) pBuf ), nAlignedWidth ); 604 605 for( long nX = 0L; nX < nWidth; nX++ ) 606 { 607 aMask.GetColorFor32Bit( aColor, (sal_uInt8*) pTmp32++ ); 608 rAcc.SetPixel( nY, nX, aColor ); 609 } 610 } 611 } 612 } 613 } 614 615 delete[] pBuf; 616 } 617 } 618 619 return( rIStm.GetError() == 0UL ); 620 } 621 622 bool ImplReadDIBBody( SvStream& rIStm, Bitmap& rBmp, Bitmap* pBmpAlpha, sal_uLong nOffset ) 623 { 624 DIBV5Header aHeader; 625 const sal_uLong nStmPos = rIStm.Tell(); 626 bool bRet(false); 627 bool bTopDown(false); 628 629 if(ImplReadDIBInfoHeader(rIStm, aHeader, bTopDown) && aHeader.nWidth && aHeader.nHeight && aHeader.nBitCount) 630 { 631 const sal_uInt16 nBitCount(discretizeBitcount(aHeader.nBitCount)); 632 const Size aSizePixel(aHeader.nWidth, aHeader.nHeight); 633 BitmapPalette aDummyPal; 634 Bitmap aNewBmp(aSizePixel, nBitCount, &aDummyPal); 635 Bitmap aNewBmpAlpha; 636 BitmapWriteAccess* pAcc = aNewBmp.AcquireWriteAccess(); 637 BitmapWriteAccess* pAccAlpha = 0; 638 bool bAlphaPossible(pBmpAlpha && aHeader.nBitCount == 32); 639 640 if(bAlphaPossible) 641 { 642 const bool bRedSet(0 != aHeader.nV5RedMask); 643 const bool bGreenSet(0 != aHeader.nV5GreenMask); 644 const bool bBlueSet(0 != aHeader.nV5BlueMask); 645 646 // some clipboard entries have alpha mask on zero to say that there is 647 // no alpha; do only use this when the other masks are set. The MS docu 648 // says that that masks are only to be set when bV5Compression is set to 649 // BI_BITFIELDS, but there seem to exist a wild variety of usages... 650 if((bRedSet || bGreenSet || bBlueSet) && (0 == aHeader.nV5AlphaMask)) 651 { 652 bAlphaPossible = false; 653 } 654 } 655 656 if(bAlphaPossible) 657 { 658 aNewBmpAlpha = Bitmap(aSizePixel, 8); 659 pAccAlpha = aNewBmpAlpha.AcquireWriteAccess(); 660 } 661 662 if(pAcc) 663 { 664 sal_uInt16 nColors(0); 665 SvStream* pIStm; 666 SvMemoryStream* pMemStm = NULL; 667 sal_uInt8* pData = NULL; 668 669 if(nBitCount <= 8) 670 { 671 if(aHeader.nColsUsed) 672 { 673 nColors = (sal_uInt16)aHeader.nColsUsed; 674 } 675 else 676 { 677 nColors = ( 1 << aHeader.nBitCount ); 678 } 679 } 680 681 if(ZCOMPRESS == aHeader.nCompression) 682 { 683 ZCodec aCodec; 684 sal_uInt32 nCodedSize(0); 685 sal_uInt32 nUncodedSize(0); 686 sal_uLong nCodedPos(0); 687 688 // read coding information 689 rIStm >> nCodedSize >> nUncodedSize >> aHeader.nCompression; 690 pData = (sal_uInt8*) rtl_allocateMemory( nUncodedSize ); 691 692 // decode buffer 693 nCodedPos = rIStm.Tell(); 694 aCodec.BeginCompression(); 695 aCodec.Read( rIStm, pData, nUncodedSize ); 696 aCodec.EndCompression(); 697 698 // skip unread bytes from coded buffer 699 rIStm.SeekRel( nCodedSize - ( rIStm.Tell() - nCodedPos ) ); 700 701 // set decoded bytes to memory stream, 702 // from which we will read the bitmap data 703 pIStm = pMemStm = new SvMemoryStream; 704 pMemStm->SetBuffer( (char*) pData, nUncodedSize, false, nUncodedSize ); 705 nOffset = 0; 706 } 707 else 708 { 709 pIStm = &rIStm; 710 } 711 712 // read palette 713 if(nColors) 714 { 715 pAcc->SetPaletteEntryCount(nColors); 716 ImplReadDIBPalette(*pIStm, *pAcc, aHeader.nSize != DIBCOREHEADERSIZE); 717 } 718 719 // read bits 720 bool bAlphaUsed(false); 721 722 if(!pIStm->GetError()) 723 { 724 if(nOffset) 725 { 726 pIStm->SeekRel(nOffset - (pIStm->Tell() - nStmPos)); 727 } 728 729 bRet = ImplReadDIBBits(*pIStm, aHeader, *pAcc, pAccAlpha, bTopDown, bAlphaUsed); 730 731 if(bRet && aHeader.nXPelsPerMeter && aHeader.nYPelsPerMeter) 732 { 733 MapMode aMapMode( 734 MAP_MM, 735 Point(), 736 Fraction(1000, aHeader.nXPelsPerMeter), 737 Fraction(1000, aHeader.nYPelsPerMeter)); 738 739 aNewBmp.SetPrefMapMode(aMapMode); 740 aNewBmp.SetPrefSize(Size(aHeader.nWidth, aHeader.nHeight)); 741 } 742 } 743 744 if( pData ) 745 { 746 rtl_freeMemory(pData); 747 } 748 749 delete pMemStm; 750 aNewBmp.ReleaseAccess(pAcc); 751 752 if(bAlphaPossible) 753 { 754 aNewBmpAlpha.ReleaseAccess(pAccAlpha); 755 756 if(!bAlphaUsed) 757 { 758 bAlphaPossible = false; 759 } 760 } 761 762 if(bRet) 763 { 764 rBmp = aNewBmp; 765 766 if(bAlphaPossible) 767 { 768 *pBmpAlpha = aNewBmpAlpha; 769 } 770 } 771 } 772 } 773 774 return bRet; 775 } 776 777 bool ImplReadDIBFileHeader( SvStream& rIStm, sal_uLong& rOffset ) 778 { 779 sal_uInt32 nTmp32; 780 sal_uInt16 nTmp16 = 0; 781 bool bRet = false; 782 783 rIStm >> nTmp16; 784 785 if ( ( 0x4D42 == nTmp16 ) || ( 0x4142 == nTmp16 ) ) 786 { 787 if ( 0x4142 == nTmp16 ) 788 { 789 rIStm.SeekRel( 12L ); 790 rIStm >> nTmp16; 791 rIStm.SeekRel( 8L ); 792 rIStm >> nTmp32; 793 rOffset = nTmp32 - 28UL; 794 bRet = ( 0x4D42 == nTmp16 ); 795 } 796 else // 0x4D42 == nTmp16, 'MB' from BITMAPFILEHEADER 797 { 798 rIStm.SeekRel( 8L ); // we are on bfSize member of BITMAPFILEHEADER, forward to bfOffBits 799 rIStm >> nTmp32; // read bfOffBits 800 rOffset = nTmp32 - 14UL; // adapt offset by sizeof(BITMAPFILEHEADER) 801 bRet = ( rIStm.GetError() == 0UL ); 802 } 803 } 804 else 805 rIStm.SetError( SVSTREAM_FILEFORMAT_ERROR ); 806 807 return bRet; 808 } 809 810 bool ImplWriteDIBPalette( SvStream& rOStm, BitmapReadAccess& rAcc ) 811 { 812 const sal_uInt16 nColors = rAcc.GetPaletteEntryCount(); 813 const sal_uLong nPalSize = nColors * 4UL; 814 sal_uInt8* pEntries = new sal_uInt8[ nPalSize ]; 815 sal_uInt8* pTmpEntry = pEntries; 816 BitmapColor aPalColor; 817 818 for( sal_uInt16 i = 0; i < nColors; i++ ) 819 { 820 const BitmapColor& rPalColor = rAcc.GetPaletteColor( i ); 821 822 *pTmpEntry++ = rPalColor.GetBlue(); 823 *pTmpEntry++ = rPalColor.GetGreen(); 824 *pTmpEntry++ = rPalColor.GetRed(); 825 *pTmpEntry++ = 0; 826 } 827 828 rOStm.Write( pEntries, nPalSize ); 829 delete[] pEntries; 830 831 return( rOStm.GetError() == 0UL ); 832 } 833 834 bool ImplWriteRLE( SvStream& rOStm, BitmapReadAccess& rAcc, bool bRLE4 ) 835 { 836 const sal_uLong nWidth = rAcc.Width(); 837 const sal_uLong nHeight = rAcc.Height(); 838 sal_uLong nX; 839 sal_uLong nSaveIndex; 840 sal_uLong nCount; 841 sal_uLong nBufCount; 842 sal_uInt8* pBuf = new sal_uInt8[ ( nWidth << 1 ) + 2 ]; 843 sal_uInt8* pTmp; 844 sal_uInt8 cPix; 845 sal_uInt8 cLast; 846 bool bFound; 847 848 for ( long nY = nHeight - 1L; nY >= 0L; nY-- ) 849 { 850 pTmp = pBuf; 851 nX = nBufCount = 0UL; 852 853 while( nX < nWidth ) 854 { 855 nCount = 1L; 856 cPix = rAcc.GetPixelIndex( nY, nX++ ); 857 858 while( ( nX < nWidth ) && ( nCount < 255L ) 859 && ( cPix == rAcc.GetPixelIndex( nY, nX ) ) ) 860 { 861 nX++; 862 nCount++; 863 } 864 865 if ( nCount > 1 ) 866 { 867 *pTmp++ = (sal_uInt8) nCount; 868 *pTmp++ = ( bRLE4 ? ( ( cPix << 4 ) | cPix ) : cPix ); 869 nBufCount += 2; 870 } 871 else 872 { 873 cLast = cPix; 874 nSaveIndex = nX - 1UL; 875 bFound = false; 876 877 while( ( nX < nWidth ) && ( nCount < 256L ) 878 && ( cPix = rAcc.GetPixelIndex( nY, nX ) ) != cLast ) 879 { 880 nX++; nCount++; 881 cLast = cPix; 882 bFound = true; 883 } 884 885 if ( bFound ) 886 nX--; 887 888 if ( nCount > 3 ) 889 { 890 *pTmp++ = 0; 891 *pTmp++ = (sal_uInt8) --nCount; 892 893 if( bRLE4 ) 894 { 895 for ( sal_uLong i = 0; i < nCount; i++, pTmp++ ) 896 { 897 *pTmp = rAcc.GetPixelIndex( nY, nSaveIndex++ ) << 4; 898 899 if ( ++i < nCount ) 900 *pTmp |= rAcc.GetPixelIndex( nY, nSaveIndex++ ); 901 } 902 903 nCount = ( nCount + 1 ) >> 1; 904 } 905 else 906 { 907 for( sal_uLong i = 0UL; i < nCount; i++ ) 908 *pTmp++ = rAcc.GetPixelIndex( nY, nSaveIndex++ ); 909 } 910 911 if ( nCount & 1 ) 912 { 913 *pTmp++ = 0; 914 nBufCount += ( nCount + 3 ); 915 } 916 else 917 nBufCount += ( nCount + 2 ); 918 } 919 else 920 { 921 *pTmp++ = 1; 922 *pTmp++ = rAcc.GetPixelIndex( nY, nSaveIndex ) << (bRLE4 ? 4 : 0); 923 924 if ( nCount == 3 ) 925 { 926 *pTmp++ = 1; 927 *pTmp++ = rAcc.GetPixelIndex( nY, ++nSaveIndex ) << ( bRLE4 ? 4 : 0 ); 928 nBufCount += 4; 929 } 930 else 931 nBufCount += 2; 932 } 933 } 934 } 935 936 pBuf[ nBufCount++ ] = 0; 937 pBuf[ nBufCount++ ] = 0; 938 939 rOStm.Write( pBuf, nBufCount ); 940 } 941 942 rOStm << (sal_uInt8) 0; 943 rOStm << (sal_uInt8) 1; 944 945 delete[] pBuf; 946 947 return( rOStm.GetError() == 0UL ); 948 } 949 950 bool ImplWriteDIBBits(SvStream& rOStm, BitmapReadAccess& rAcc, BitmapReadAccess* pAccAlpha, sal_uLong nCompression, sal_uInt32& rImageSize) 951 { 952 if(!pAccAlpha && BITFIELDS == nCompression) 953 { 954 const ColorMask& rMask = rAcc.GetColorMask(); 955 SVBT32 aVal32; 956 957 UInt32ToSVBT32( rMask.GetRedMask(), aVal32 ); 958 rOStm.Write( (sal_uInt8*) aVal32, 4UL ); 959 960 UInt32ToSVBT32( rMask.GetGreenMask(), aVal32 ); 961 rOStm.Write( (sal_uInt8*) aVal32, 4UL ); 962 963 UInt32ToSVBT32( rMask.GetBlueMask(), aVal32 ); 964 rOStm.Write( (sal_uInt8*) aVal32, 4UL ); 965 966 rImageSize = rOStm.Tell(); 967 968 if( rAcc.IsBottomUp() ) 969 rOStm.Write( rAcc.GetBuffer(), rAcc.Height() * rAcc.GetScanlineSize() ); 970 else 971 { 972 for( long nY = rAcc.Height() - 1, nScanlineSize = rAcc.GetScanlineSize(); nY >= 0L; nY-- ) 973 rOStm.Write( rAcc.GetScanline( nY ), nScanlineSize ); 974 } 975 } 976 else if(!pAccAlpha && ((RLE_4 == nCompression) || (RLE_8 == nCompression))) 977 { 978 rImageSize = rOStm.Tell(); 979 ImplWriteRLE( rOStm, rAcc, RLE_4 == nCompression ); 980 } 981 else if(!nCompression) 982 { 983 // #i5xxx# Limit bitcount to 24bit, the 32 bit cases are not 984 // handled properly below (would have to set color masks, and 985 // nCompression=BITFIELDS - but color mask is not set for 986 // formats != *_TC_*). Note that this very problem might cause 987 // trouble at other places - the introduction of 32 bit RGBA 988 // bitmaps is relatively recent. 989 // #i59239# discretize bitcount for aligned width to 1,4,8,24 990 // (other cases are not written below) 991 const sal_uInt16 nBitCount(pAccAlpha ? 32 : discretizeBitcount(static_cast< sal_uInt16 >(rAcc.GetBitCount()))); 992 const sal_uLong nAlignedWidth(AlignedWidth4Bytes(rAcc.Width() * nBitCount)); 993 bool bNative(false); 994 995 switch(rAcc.GetScanlineFormat()) 996 { 997 case( BMP_FORMAT_1BIT_MSB_PAL ): 998 case( BMP_FORMAT_4BIT_MSN_PAL ): 999 case( BMP_FORMAT_8BIT_PAL ): 1000 case( BMP_FORMAT_24BIT_TC_BGR ): 1001 { 1002 if(!pAccAlpha && rAcc.IsBottomUp() && (rAcc.GetScanlineSize() == nAlignedWidth)) 1003 { 1004 bNative = true; 1005 } 1006 1007 break; 1008 } 1009 1010 default: 1011 { 1012 break; 1013 } 1014 } 1015 1016 rImageSize = rOStm.Tell(); 1017 1018 if(bNative) 1019 { 1020 rOStm.Write(rAcc.GetBuffer(), nAlignedWidth * rAcc.Height()); 1021 } 1022 else 1023 { 1024 const long nWidth(rAcc.Width()); 1025 const long nHeight(rAcc.Height()); 1026 sal_uInt8* pBuf = new sal_uInt8[ nAlignedWidth ]; 1027 sal_uInt8* pTmp(0); 1028 sal_uInt8 cTmp(0); 1029 1030 switch( nBitCount ) 1031 { 1032 case( 1 ): 1033 { 1034 for( long nY = nHeight - 1; nY >= 0L; nY-- ) 1035 { 1036 pTmp = pBuf; 1037 cTmp = 0; 1038 1039 for( long nX = 0L, nShift = 8L; nX < nWidth; nX++ ) 1040 { 1041 if( !nShift ) 1042 { 1043 nShift = 8L; 1044 *pTmp++ = cTmp; 1045 cTmp = 0; 1046 } 1047 1048 cTmp |= rAcc.GetPixelIndex( nY, nX ) << --nShift; 1049 } 1050 1051 *pTmp = cTmp; 1052 rOStm.Write( pBuf, nAlignedWidth ); 1053 } 1054 } 1055 break; 1056 1057 case( 4 ): 1058 { 1059 for( long nY = nHeight - 1; nY >= 0L; nY-- ) 1060 { 1061 pTmp = pBuf; 1062 cTmp = 0; 1063 1064 for( long nX = 0L, nShift = 2L; nX < nWidth; nX++ ) 1065 { 1066 if( !nShift ) 1067 { 1068 nShift = 2L; 1069 *pTmp++ = cTmp; 1070 cTmp = 0; 1071 } 1072 1073 cTmp |= rAcc.GetPixelIndex( nY, nX ) << ( --nShift << 2L ); 1074 } 1075 *pTmp = cTmp; 1076 rOStm.Write( pBuf, nAlignedWidth ); 1077 } 1078 } 1079 break; 1080 1081 case( 8 ): 1082 { 1083 for( long nY = nHeight - 1; nY >= 0L; nY-- ) 1084 { 1085 pTmp = pBuf; 1086 1087 for( long nX = 0L; nX < nWidth; nX++ ) 1088 *pTmp++ = rAcc.GetPixelIndex( nY, nX ); 1089 1090 rOStm.Write( pBuf, nAlignedWidth ); 1091 } 1092 } 1093 break; 1094 1095 // #i59239# fallback to 24 bit format, if bitcount is non-default 1096 default: 1097 // FALLTHROUGH intended 1098 case( 24 ): 1099 { 1100 BitmapColor aPixelColor; 1101 const bool bWriteAlpha(32 == nBitCount && pAccAlpha); 1102 1103 for( long nY = nHeight - 1; nY >= 0L; nY-- ) 1104 { 1105 pTmp = pBuf; 1106 1107 for( long nX = 0L; nX < nWidth; nX++ ) 1108 { 1109 // when alpha is used, this may be non-24bit main bitmap, so use GetColor 1110 // instead of GetPixel to ensure RGB value 1111 aPixelColor = rAcc.GetColor( nY, nX ); 1112 1113 *pTmp++ = aPixelColor.GetBlue(); 1114 *pTmp++ = aPixelColor.GetGreen(); 1115 *pTmp++ = aPixelColor.GetRed(); 1116 1117 if(bWriteAlpha) 1118 { 1119 if(pAccAlpha) 1120 { 1121 *pTmp++ = (sal_uInt8)0xff - (sal_uInt8)pAccAlpha->GetPixelIndex( nY, nX ); 1122 } 1123 else 1124 { 1125 *pTmp++ = (sal_uInt8)0xff; 1126 } 1127 } 1128 } 1129 1130 rOStm.Write( pBuf, nAlignedWidth ); 1131 } 1132 } 1133 break; 1134 } 1135 1136 delete[] pBuf; 1137 } 1138 } 1139 1140 rImageSize = rOStm.Tell() - rImageSize; 1141 1142 return (!rOStm.GetError()); 1143 } 1144 1145 bool ImplWriteDIBBody(const Bitmap& rBitmap, SvStream& rOStm, BitmapReadAccess& rAcc, BitmapReadAccess* pAccAlpha, bool bCompressed) 1146 { 1147 const MapMode aMapPixel(MAP_PIXEL); 1148 DIBV5Header aHeader; 1149 sal_uLong nImageSizePos(0); 1150 sal_uLong nEndPos(0); 1151 sal_uInt32 nCompression(COMPRESS_NONE); 1152 bool bRet(false); 1153 1154 aHeader.nSize = pAccAlpha ? DIBV5HEADERSIZE : DIBINFOHEADERSIZE; // size dependent on CF_DIB type to use 1155 aHeader.nWidth = rAcc.Width(); 1156 aHeader.nHeight = rAcc.Height(); 1157 aHeader.nPlanes = 1; 1158 1159 if(!pAccAlpha && isBitfieldCompression(rAcc.GetScanlineFormat())) 1160 { 1161 aHeader.nBitCount = (BMP_FORMAT_16BIT_TC_LSB_MASK == rAcc.GetScanlineFormat()) ? 16 : 32; 1162 aHeader.nSizeImage = rAcc.Height() * rAcc.GetScanlineSize(); 1163 nCompression = BITFIELDS; 1164 } 1165 else 1166 { 1167 // #i5xxx# Limit bitcount to 24bit, the 32 bit cases are 1168 // not handled properly below (would have to set color 1169 // masks, and nCompression=BITFIELDS - but color mask is 1170 // not set for formats != *_TC_*). Note that this very 1171 // problem might cause trouble at other places - the 1172 // introduction of 32 bit RGBA bitmaps is relatively 1173 // recent. 1174 // #i59239# discretize bitcount to 1,4,8,24 (other cases 1175 // are not written below) 1176 const sal_uInt16 nBitCount(pAccAlpha ? 32 : discretizeBitcount(static_cast< sal_uInt16 >(rAcc.GetBitCount()))); 1177 aHeader.nBitCount = nBitCount; 1178 aHeader.nSizeImage = rAcc.Height() * AlignedWidth4Bytes(rAcc.Width() * aHeader.nBitCount); 1179 1180 if(bCompressed) 1181 { 1182 if(4 == nBitCount) 1183 { 1184 nCompression = RLE_4; 1185 } 1186 else if(8 == nBitCount) 1187 { 1188 nCompression = RLE_8; 1189 } 1190 } 1191 } 1192 1193 if((rOStm.GetCompressMode() & COMPRESSMODE_ZBITMAP) && (rOStm.GetVersion() >= SOFFICE_FILEFORMAT_40)) 1194 { 1195 aHeader.nCompression = ZCOMPRESS; 1196 } 1197 else 1198 { 1199 aHeader.nCompression = nCompression; 1200 } 1201 1202 if(rBitmap.GetPrefSize().Width() && rBitmap.GetPrefSize().Height() && (rBitmap.GetPrefMapMode() != aMapPixel)) 1203 { 1204 // #i48108# Try to recover xpels/ypels as previously stored on 1205 // disk. The problem with just converting maPrefSize to 100th 1206 // mm and then relating that to the bitmap pixel size is that 1207 // MapMode is integer-based, and suffers from roundoffs, 1208 // especially if maPrefSize is small. Trying to circumvent 1209 // that by performing part of the math in floating point. 1210 const Size aScale100000(OutputDevice::LogicToLogic(Size(100000L, 100000L), MAP_100TH_MM, rBitmap.GetPrefMapMode())); 1211 const double fBmpWidthM((double)rBitmap.GetPrefSize().Width() / aScale100000.Width()); 1212 const double fBmpHeightM((double)rBitmap.GetPrefSize().Height() / aScale100000.Height()); 1213 1214 if(!basegfx::fTools::equalZero(fBmpWidthM) && !basegfx::fTools::equalZero(fBmpHeightM)) 1215 { 1216 aHeader.nXPelsPerMeter = basegfx::fround(rAcc.Width() / fabs(fBmpWidthM)); 1217 aHeader.nYPelsPerMeter = basegfx::fround(rAcc.Height() / fabs(fBmpHeightM)); 1218 } 1219 } 1220 1221 aHeader.nColsUsed = ((!pAccAlpha && aHeader.nBitCount <= 8) ? rAcc.GetPaletteEntryCount() : 0); 1222 aHeader.nColsImportant = 0; 1223 1224 rOStm << aHeader.nSize; 1225 rOStm << aHeader.nWidth; 1226 rOStm << aHeader.nHeight; 1227 rOStm << aHeader.nPlanes; 1228 rOStm << aHeader.nBitCount; 1229 rOStm << aHeader.nCompression; 1230 1231 nImageSizePos = rOStm.Tell(); 1232 rOStm.SeekRel( sizeof( aHeader.nSizeImage ) ); 1233 1234 rOStm << aHeader.nXPelsPerMeter; 1235 rOStm << aHeader.nYPelsPerMeter; 1236 rOStm << aHeader.nColsUsed; 1237 rOStm << aHeader.nColsImportant; 1238 1239 if(pAccAlpha) // only write DIBV5 when asked to do so 1240 { 1241 aHeader.nV5CSType = 0x57696E20; // LCS_WINDOWS_COLOR_SPACE 1242 aHeader.nV5Intent = 0x00000004; // LCS_GM_IMAGES 1243 1244 rOStm << aHeader.nV5RedMask; 1245 rOStm << aHeader.nV5GreenMask; 1246 rOStm << aHeader.nV5BlueMask; 1247 rOStm << aHeader.nV5AlphaMask; 1248 rOStm << aHeader.nV5CSType; 1249 1250 rOStm << aHeader.aV5Endpoints.aXyzRed.aXyzX; 1251 rOStm << aHeader.aV5Endpoints.aXyzRed.aXyzY; 1252 rOStm << aHeader.aV5Endpoints.aXyzRed.aXyzZ; 1253 rOStm << aHeader.aV5Endpoints.aXyzGreen.aXyzX; 1254 rOStm << aHeader.aV5Endpoints.aXyzGreen.aXyzY; 1255 rOStm << aHeader.aV5Endpoints.aXyzGreen.aXyzZ; 1256 rOStm << aHeader.aV5Endpoints.aXyzBlue.aXyzX; 1257 rOStm << aHeader.aV5Endpoints.aXyzBlue.aXyzY; 1258 rOStm << aHeader.aV5Endpoints.aXyzBlue.aXyzZ; 1259 1260 rOStm << aHeader.nV5GammaRed; 1261 rOStm << aHeader.nV5GammaGreen; 1262 rOStm << aHeader.nV5GammaBlue; 1263 rOStm << aHeader.nV5Intent; 1264 rOStm << aHeader.nV5ProfileData; 1265 rOStm << aHeader.nV5ProfileSize; 1266 rOStm << aHeader.nV5Reserved; 1267 } 1268 1269 if(ZCOMPRESS == aHeader.nCompression) 1270 { 1271 ZCodec aCodec; 1272 SvMemoryStream aMemStm(aHeader.nSizeImage + 4096, 65535); 1273 sal_uLong nCodedPos(rOStm.Tell()); 1274 sal_uLong nLastPos(0); 1275 sal_uInt32 nCodedSize(0); 1276 sal_uInt32 nUncodedSize(0); 1277 1278 // write uncoded data palette 1279 if(aHeader.nColsUsed) 1280 { 1281 ImplWriteDIBPalette(aMemStm, rAcc); 1282 } 1283 1284 // write uncoded bits 1285 bRet = ImplWriteDIBBits(aMemStm, rAcc, pAccAlpha, nCompression, aHeader.nSizeImage); 1286 1287 // get uncoded size 1288 nUncodedSize = aMemStm.Tell(); 1289 1290 // seek over compress info 1291 rOStm.SeekRel(12); 1292 1293 // write compressed data 1294 aCodec.BeginCompression(3); 1295 aCodec.Write(rOStm, (sal_uInt8*)aMemStm.GetData(), nUncodedSize); 1296 aCodec.EndCompression(); 1297 1298 // update compress info ( coded size, uncoded size, uncoded compression ) 1299 nLastPos = rOStm.Tell(); 1300 nCodedSize = nLastPos - nCodedPos - 12; 1301 rOStm.Seek(nCodedPos); 1302 rOStm << nCodedSize << nUncodedSize << nCompression; 1303 rOStm.Seek(nLastPos); 1304 1305 if(bRet) 1306 { 1307 bRet = (ERRCODE_NONE == rOStm.GetError()); 1308 } 1309 } 1310 else 1311 { 1312 if(aHeader.nColsUsed) 1313 { 1314 ImplWriteDIBPalette(rOStm, rAcc); 1315 } 1316 1317 bRet = ImplWriteDIBBits(rOStm, rAcc, pAccAlpha, aHeader.nCompression, aHeader.nSizeImage); 1318 } 1319 1320 nEndPos = rOStm.Tell(); 1321 rOStm.Seek(nImageSizePos); 1322 rOStm << aHeader.nSizeImage; 1323 rOStm.Seek(nEndPos); 1324 1325 return bRet; 1326 } 1327 1328 bool ImplWriteDIBFileHeader(SvStream& rOStm, BitmapReadAccess& rAcc, bool bUseDIBV5) 1329 { 1330 const sal_uInt32 nPalCount((rAcc.HasPalette() ? rAcc.GetPaletteEntryCount() : isBitfieldCompression(rAcc.GetScanlineFormat()) ? 3UL : 0UL)); 1331 const sal_uInt32 nOffset(14 + (bUseDIBV5 ? DIBV5HEADERSIZE : DIBINFOHEADERSIZE) + nPalCount * 4UL); 1332 1333 rOStm << (sal_uInt16)0x4D42; // 'MB' from BITMAPFILEHEADER 1334 rOStm << (sal_uInt32)(nOffset + (rAcc.Height() * rAcc.GetScanlineSize())); 1335 rOStm << (sal_uInt16)0; 1336 rOStm << (sal_uInt16)0; 1337 rOStm << nOffset; 1338 1339 return( rOStm.GetError() == 0UL ); 1340 } 1341 1342 ////////////////////////////////////////////////////////////////////////////// 1343 1344 bool ImplReadDIB( 1345 Bitmap& rTarget, Bitmap* 1346 pTargetAlpha, 1347 SvStream& rIStm, 1348 bool bFileHeader) 1349 { 1350 const sal_uInt16 nOldFormat(rIStm.GetNumberFormatInt()); 1351 const sal_uLong nOldPos(rIStm.Tell()); 1352 sal_uLong nOffset(0UL); 1353 bool bRet(false); 1354 1355 rIStm.SetNumberFormatInt(NUMBERFORMAT_INT_LITTLEENDIAN); 1356 1357 if(bFileHeader) 1358 { 1359 if(ImplReadDIBFileHeader(rIStm, nOffset)) 1360 { 1361 bRet = ImplReadDIBBody(rIStm, rTarget, nOffset >= DIBV5HEADERSIZE ? pTargetAlpha : 0, nOffset); 1362 } 1363 } 1364 else 1365 { 1366 bRet = ImplReadDIBBody(rIStm, rTarget, 0, nOffset); 1367 } 1368 1369 if(!bRet) 1370 { 1371 if(!rIStm.GetError()) 1372 { 1373 rIStm.SetError(SVSTREAM_GENERALERROR); 1374 } 1375 1376 rIStm.Seek(nOldPos); 1377 } 1378 1379 rIStm.SetNumberFormatInt(nOldFormat); 1380 1381 return bRet; 1382 } 1383 1384 bool ImplWriteDIB( 1385 const Bitmap& rSource, 1386 const Bitmap* pSourceAlpha, 1387 SvStream& rOStm, 1388 bool bCompressed, 1389 bool bFileHeader) 1390 { 1391 const Size aSizePix(rSource.GetSizePixel()); 1392 bool bRet(false); 1393 1394 if(aSizePix.Width() && aSizePix.Height()) 1395 { 1396 BitmapReadAccess* pAcc = const_cast< Bitmap& >(rSource).AcquireReadAccess(); 1397 BitmapReadAccess* pAccAlpha = 0; 1398 const sal_uInt16 nOldFormat(rOStm.GetNumberFormatInt()); 1399 const sal_uLong nOldPos(rOStm.Tell()); 1400 1401 if(pSourceAlpha) 1402 { 1403 const Size aSizePixAlpha(pSourceAlpha->GetSizePixel()); 1404 1405 if(aSizePixAlpha == aSizePix) 1406 { 1407 pAccAlpha = const_cast< Bitmap* >(pSourceAlpha)->AcquireReadAccess(); 1408 } 1409 else 1410 { 1411 OSL_ENSURE(false, "WriteDIB got an alpha channel, but it's pixel size differs from the base bitmap (!)"); 1412 } 1413 } 1414 1415 rOStm.SetNumberFormatInt(NUMBERFORMAT_INT_LITTLEENDIAN); 1416 1417 if(pAcc) 1418 { 1419 if(bFileHeader) 1420 { 1421 if(ImplWriteDIBFileHeader(rOStm, *pAcc, 0 != pSourceAlpha)) 1422 { 1423 bRet = ImplWriteDIBBody(rSource, rOStm, *pAcc, pAccAlpha, bCompressed); 1424 } 1425 } 1426 else 1427 { 1428 bRet = ImplWriteDIBBody(rSource, rOStm, *pAcc, pAccAlpha, bCompressed); 1429 } 1430 1431 const_cast< Bitmap& >(rSource).ReleaseAccess(pAcc); 1432 1433 if(pAccAlpha) 1434 { 1435 const_cast< Bitmap* >(pSourceAlpha)->ReleaseAccess(pAccAlpha); 1436 } 1437 } 1438 1439 if(!bRet) 1440 { 1441 rOStm.SetError(SVSTREAM_GENERALERROR); 1442 rOStm.Seek(nOldPos); 1443 } 1444 1445 rOStm.SetNumberFormatInt(nOldFormat); 1446 } 1447 1448 return bRet; 1449 } 1450 1451 ////////////////////////////////////////////////////////////////////////////// 1452 1453 bool ReadDIB( 1454 Bitmap& rTarget, 1455 SvStream& rIStm, 1456 bool bFileHeader) 1457 { 1458 return ImplReadDIB(rTarget, 0, rIStm, bFileHeader); 1459 } 1460 1461 bool ReadDIBBitmapEx( 1462 BitmapEx& rTarget, 1463 SvStream& rIStm) 1464 { 1465 Bitmap aBmp; 1466 bool bRetval(ImplReadDIB(aBmp, 0, rIStm, true) && !rIStm.GetError()); 1467 1468 if(bRetval) 1469 { 1470 // base bitmap was read, set as return value and try to read alpha extra-data 1471 const sal_uLong nStmPos(rIStm.Tell()); 1472 sal_uInt32 nMagic1(0); 1473 sal_uInt32 nMagic2(0); 1474 1475 rTarget = BitmapEx(aBmp); 1476 rIStm >> nMagic1 >> nMagic2; 1477 bRetval = (0x25091962 == nMagic1) && (0xACB20201 == nMagic2) && !rIStm.GetError(); 1478 1479 if(bRetval) 1480 { 1481 sal_uInt8 bTransparent(false); 1482 1483 rIStm >> bTransparent; 1484 bRetval = !rIStm.GetError(); 1485 1486 if(bRetval) 1487 { 1488 if((sal_uInt8)TRANSPARENT_BITMAP == bTransparent) 1489 { 1490 Bitmap aMask; 1491 1492 bRetval = ImplReadDIB(aMask, 0, rIStm, true); 1493 1494 if(bRetval) 1495 { 1496 if(!!aMask) 1497 { 1498 // do we have an alpha mask? 1499 if((8 == aMask.GetBitCount()) && aMask.HasGreyPalette()) 1500 { 1501 AlphaMask aAlpha; 1502 1503 // create alpha mask quickly (without greyscale conversion) 1504 aAlpha.ImplSetBitmap(aMask); 1505 rTarget = BitmapEx(aBmp, aAlpha); 1506 } 1507 else 1508 { 1509 rTarget = BitmapEx(aBmp, aMask); 1510 } 1511 } 1512 } 1513 } 1514 else if((sal_uInt8)TRANSPARENT_COLOR == bTransparent) 1515 { 1516 Color aTransparentColor; 1517 1518 rIStm >> aTransparentColor; 1519 bRetval = !rIStm.GetError(); 1520 1521 if(bRetval) 1522 { 1523 rTarget = BitmapEx(aBmp, aTransparentColor); 1524 } 1525 } 1526 } 1527 } 1528 1529 if(!bRetval) 1530 { 1531 // alpha extra data could not be read; reset, but use base bitmap as result 1532 rIStm.ResetError(); 1533 rIStm.Seek(nStmPos); 1534 bRetval = true; 1535 } 1536 } 1537 1538 return bRetval; 1539 } 1540 1541 bool ReadDIBV5( 1542 Bitmap& rTarget, 1543 Bitmap& rTargetAlpha, 1544 SvStream& rIStm) 1545 { 1546 return ImplReadDIB(rTarget, &rTargetAlpha, rIStm, true); 1547 } 1548 1549 ////////////////////////////////////////////////////////////////////////////// 1550 1551 bool WriteDIB( 1552 const Bitmap& rSource, 1553 SvStream& rOStm, 1554 bool bCompressed, 1555 bool bFileHeader) 1556 { 1557 return ImplWriteDIB(rSource, 0, rOStm, bCompressed, bFileHeader); 1558 } 1559 1560 bool WriteDIBBitmapEx( 1561 const BitmapEx& rSource, 1562 SvStream& rOStm) 1563 { 1564 if(ImplWriteDIB(rSource.GetBitmap(), 0, rOStm, true, true)) 1565 { 1566 rOStm << (sal_uInt32)0x25091962; 1567 rOStm << (sal_uInt32)0xACB20201; 1568 rOStm << (sal_uInt8)rSource.eTransparent; 1569 1570 if(TRANSPARENT_BITMAP == rSource.eTransparent) 1571 { 1572 return ImplWriteDIB(rSource.aMask, 0, rOStm, true, true); 1573 } 1574 else if(TRANSPARENT_COLOR == rSource.eTransparent) 1575 { 1576 rOStm << rSource.aTransparentColor; 1577 return true; 1578 } 1579 } 1580 1581 return false; 1582 } 1583 1584 bool WriteDIBV5( 1585 const Bitmap& rSource, 1586 const Bitmap& rSourceAlpha, 1587 SvStream& rOStm) 1588 { 1589 return ImplWriteDIB(rSource, &rSourceAlpha, rOStm, false, true); 1590 } 1591 1592 ////////////////////////////////////////////////////////////////////////////// 1593 // eof 1594