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bump product version to 7.2.5.1
[LibreOffice.git] / vcl / source / bitmap / BitmapEx.cxx
blob2c56ab44b6a09b144c3aee53411d6b5be0fed5b0
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 <sal/log.hxx>
21 #include <rtl/math.hxx>
22 #include <o3tl/underlyingenumvalue.hxx>
23 #include <osl/diagnose.h>
24 #include <basegfx/matrix/b2dhommatrixtools.hxx>
25 #include <basegfx/color/bcolormodifier.hxx>
26
27 #include <vcl/ImageTree.hxx>
28 #include <vcl/outdev.hxx>
29 #include <vcl/alpha.hxx>
30 #include <vcl/bitmapex.hxx>
31 #include <vcl/svapp.hxx>
32 #include <vcl/virdev.hxx>
33 #include <vcl/settings.hxx>
34 #include <vcl/BitmapMonochromeFilter.hxx>
35
36 // BitmapEx::Create
37 #include <salbmp.hxx>
38 #include <salinst.hxx>
39 #include <svdata.hxx>
40 #include <bitmap/BitmapWriteAccess.hxx>
41 #include <bitmap/BitmapMaskToAlphaFilter.hxx>
42
43 #include <o3tl/any.hxx>
44
45 #include <com/sun/star/beans/XFastPropertySet.hpp>
46
47 #include <memory>
48
49 using namespace ::com::sun::star;
50
51 BitmapEx::BitmapEx()
52 {
53 }
54
55 BitmapEx::BitmapEx( const BitmapEx& ) = default;
56
57 BitmapEx::BitmapEx( const BitmapEx& rBitmapEx, Point aSrc, Size aSize )
58 {
59 if( rBitmapEx.IsEmpty() || aSize.IsEmpty() )
60 return;
61
62 maBitmap = Bitmap(aSize, rBitmapEx.maBitmap.getPixelFormat());
63 SetSizePixel(aSize);
64 if( rBitmapEx.IsAlpha() )
65 maAlphaMask = AlphaMask( aSize ).ImplGetBitmap();
66
67 tools::Rectangle aDestRect( Point( 0, 0 ), aSize );
68 tools::Rectangle aSrcRect( aSrc, aSize );
69 CopyPixel( aDestRect, aSrcRect, &rBitmapEx );
70 }
71
72 BitmapEx::BitmapEx(Size aSize, vcl::PixelFormat ePixelFormat)
73 {
74 maBitmap = Bitmap(aSize, ePixelFormat);
75 SetSizePixel(aSize);
76 }
77
78 BitmapEx::BitmapEx( const OUString& rIconName )
79 {
80 loadFromIconTheme( rIconName );
81 }
82
83 void BitmapEx::loadFromIconTheme( const OUString& rIconName )
84 {
85 bool bSuccess;
86 OUString aIconTheme;
87
88 try
89 {
90 aIconTheme = Application::GetSettings().GetStyleSettings().DetermineIconTheme();
91 bSuccess = ImageTree::get().loadImage(rIconName, aIconTheme, *this, true);
92 }
93 catch (...)
94 {
95 bSuccess = false;
96 }
97
98 SAL_WARN_IF( !bSuccess, "vcl", "BitmapEx::BitmapEx(): could not load image " << rIconName << " via icon theme " << aIconTheme);
99 }
100
101 BitmapEx::BitmapEx( const Bitmap& rBmp ) :
102 maBitmap ( rBmp ),
103 maBitmapSize ( maBitmap.GetSizePixel() )
104 {
105 }
106
107 BitmapEx::BitmapEx( const Bitmap& rBmp, const Bitmap& rMask ) :
108 maBitmap ( rBmp ),
109 maBitmapSize ( maBitmap.GetSizePixel() )
110 {
111 if (rMask.IsEmpty())
112 return;
113
114 if( rMask.getPixelFormat() == vcl::PixelFormat::N8_BPP && rMask.HasGreyPalette8Bit() )
115 maAlphaMask = rMask;
116 else if (rMask.getPixelFormat() == vcl::PixelFormat::N1_BPP)
117 {
118 // convert 1-bit mask to alpha bitmap
119 BitmapEx aBmpEx(rMask);
120 BitmapFilter::Filter(aBmpEx, BitmapMaskToAlphaFilter());
121 maAlphaMask = aBmpEx.GetBitmap();
122 }
123 else
124 {
125 // convert to alpha bitmap
126 SAL_WARN( "vcl", "BitmapEx: forced mask to monochrome");
127 BitmapEx aMaskEx(rMask);
128 BitmapFilter::Filter(aMaskEx, BitmapMonochromeFilter(255));
129 BitmapFilter::Filter(aMaskEx, BitmapMaskToAlphaFilter());
130 maAlphaMask = aMaskEx.GetBitmap();
131 }
132
133 if (!maBitmap.IsEmpty() && maBitmap.GetSizePixel() != maAlphaMask.GetSizePixel())
134 {
135 OSL_ENSURE(false, "Mask size differs from Bitmap size, corrected Mask (!)");
136 maAlphaMask.Scale(maBitmap.GetSizePixel());
137 }
138 }
139
140 BitmapEx::BitmapEx( const Bitmap& rBmp, const AlphaMask& rAlphaMask ) :
141 maBitmap ( rBmp ),
142 maAlphaMask ( rAlphaMask.ImplGetBitmap() ),
143 maBitmapSize ( maBitmap.GetSizePixel() )
144 {
145 if (!maBitmap.IsEmpty() && !maAlphaMask.IsEmpty() && maBitmap.GetSizePixel() != maAlphaMask.GetSizePixel())
146 {
147 OSL_ENSURE(false, "Alpha size differs from Bitmap size, corrected Mask (!)");
148 maAlphaMask.Scale(rBmp.GetSizePixel());
149 }
150 }
151
152
153 BitmapEx::BitmapEx( const Bitmap& rBmp, const Color& rTransparentColor ) :
154 maBitmap ( rBmp ),
155 maBitmapSize ( maBitmap.GetSizePixel() )
156 {
157 maAlphaMask = maBitmap.CreateMask( rTransparentColor );
158
159 SAL_WARN_IF(rBmp.GetSizePixel() != maAlphaMask.GetSizePixel(), "vcl",
160 "BitmapEx::BitmapEx(): size mismatch for bitmap and alpha mask.");
161 }
162
163
164 BitmapEx& BitmapEx::operator=( const BitmapEx& ) = default;
165
166 bool BitmapEx::operator==( const BitmapEx& rBitmapEx ) const
167 {
168 if (GetSizePixel() != rBitmapEx.GetSizePixel())
169 return false;
170
171 if (maBitmap != rBitmapEx.maBitmap)
172 return false;
173
174 return maAlphaMask == rBitmapEx.maAlphaMask;
175 }
176
177 bool BitmapEx::IsEmpty() const
178 {
179 return( maBitmap.IsEmpty() && maAlphaMask.IsEmpty() );
180 }
181
182 void BitmapEx::SetEmpty()
183 {
184 maBitmap.SetEmpty();
185 maAlphaMask.SetEmpty();
186 }
187
188 void BitmapEx::Clear()
189 {
190 SetEmpty();
191 }
192
193 bool BitmapEx::IsAlpha() const
194 {
195 return !maAlphaMask.IsEmpty();
196 }
197
198 const Bitmap& BitmapEx::GetBitmap() const
199 {
200 return maBitmap;
201 }
202
203 Bitmap BitmapEx::GetBitmap( Color aTransparentReplaceColor ) const
204 {
205 Bitmap aRetBmp( maBitmap );
206
207 if( !maAlphaMask.IsEmpty() )
208 {
209 aRetBmp.Replace( maAlphaMask, aTransparentReplaceColor );
210 }
211
212 return aRetBmp;
213 }
214
215 AlphaMask BitmapEx::GetAlpha() const
216 {
217 return AlphaMask(maAlphaMask);
218 }
219
220 sal_Int64 BitmapEx::GetSizeBytes() const
221 {
222 sal_Int64 nSizeBytes = maBitmap.GetSizeBytes();
223
224 if( !maAlphaMask.IsEmpty() )
225 nSizeBytes += maAlphaMask.GetSizeBytes();
226
227 return nSizeBytes;
228 }
229
230 BitmapChecksum BitmapEx::GetChecksum() const
231 {
232 BitmapChecksum nCrc = maBitmap.GetChecksum();
233
234 if( !maAlphaMask.IsEmpty() )
235 {
236 BitmapChecksumOctetArray aBCOA;
237 BCToBCOA( maAlphaMask.GetChecksum(), aBCOA );
238 nCrc = vcl_get_checksum( nCrc, aBCOA, BITMAP_CHECKSUM_SIZE );
239 }
240
241 return nCrc;
242 }
243
244 void BitmapEx::SetSizePixel(const Size& rNewSize)
245 {
246 maBitmapSize = rNewSize;
247 }
248
249 bool BitmapEx::Invert()
250 {
251 bool bRet = false;
252
253 if (!maBitmap.IsEmpty())
254 bRet = maBitmap.Invert();
255
256 return bRet;
257 }
258
259 bool BitmapEx::Mirror( BmpMirrorFlags nMirrorFlags )
260 {
261 bool bRet = false;
262
263 if( !maBitmap.IsEmpty() )
264 {
265 bRet = maBitmap.Mirror( nMirrorFlags );
266
267 if( bRet && !maAlphaMask.IsEmpty() )
268 maAlphaMask.Mirror( nMirrorFlags );
269 }
270
271 return bRet;
272 }
273
274 bool BitmapEx::Scale( const double& rScaleX, const double& rScaleY, BmpScaleFlag nScaleFlag )
275 {
276 bool bRet = false;
277
278 if( !maBitmap.IsEmpty() )
279 {
280 bRet = maBitmap.Scale( rScaleX, rScaleY, nScaleFlag );
281
282 if( bRet && !maAlphaMask.IsEmpty() )
283 {
284 maAlphaMask.Scale( rScaleX, rScaleY, nScaleFlag );
285 }
286
287 SetSizePixel(maBitmap.GetSizePixel());
288
289 SAL_WARN_IF( !maAlphaMask.IsEmpty() && maBitmap.GetSizePixel() != maAlphaMask.GetSizePixel(), "vcl",
290 "BitmapEx::Scale(): size mismatch for bitmap and alpha mask." );
291 }
292
293 return bRet;
294 }
295
296 bool BitmapEx::Scale( const Size& rNewSize, BmpScaleFlag nScaleFlag )
297 {
298 bool bRet;
299
300 if (GetSizePixel().Width() && GetSizePixel().Height()
301 && (rNewSize.Width() != GetSizePixel().Width()
302 || rNewSize.Height() != GetSizePixel().Height() ) )
303 {
304 bRet = Scale( static_cast<double>(rNewSize.Width()) / GetSizePixel().Width(),
305 static_cast<double>(rNewSize.Height()) / GetSizePixel().Height(),
306 nScaleFlag );
307 }
308 else
309 {
310 bRet = true;
311 }
312
313 return bRet;
314 }
315
316 bool BitmapEx::Rotate( Degree10 nAngle10, const Color& rFillColor )
317 {
318 bool bRet = false;
319
320 if( !maBitmap.IsEmpty() )
321 {
322 const bool bTransRotate = ( COL_TRANSPARENT == rFillColor );
323
324 if( bTransRotate )
325 {
326 bRet = maBitmap.Rotate( nAngle10, COL_BLACK );
327
328 if( maAlphaMask.IsEmpty() )
329 {
330 maAlphaMask = Bitmap(GetSizePixel(), vcl::PixelFormat::N8_BPP, &Bitmap::GetGreyPalette(256));
331 maAlphaMask.Erase( COL_BLACK );
332 }
333
334 if( bRet && !maAlphaMask.IsEmpty() )
335 maAlphaMask.Rotate( nAngle10, COL_WHITE );
336 }
337 else
338 {
339 bRet = maBitmap.Rotate( nAngle10, rFillColor );
340
341 if( bRet && !maAlphaMask.IsEmpty() )
342 maAlphaMask.Rotate( nAngle10, COL_WHITE );
343 }
344
345 SetSizePixel(maBitmap.GetSizePixel());
346
347 SAL_WARN_IF(!maAlphaMask.IsEmpty() && maBitmap.GetSizePixel() != maAlphaMask.GetSizePixel(), "vcl",
348 "BitmapEx::Rotate(): size mismatch for bitmap and alpha mask.");
349 }
350
351 return bRet;
352 }
353
354 bool BitmapEx::Crop( const tools::Rectangle& rRectPixel )
355 {
356 bool bRet = false;
357
358 if( !maBitmap.IsEmpty() )
359 {
360 bRet = maBitmap.Crop( rRectPixel );
361
362 if( bRet && !maAlphaMask.IsEmpty() )
363 maAlphaMask.Crop( rRectPixel );
364
365 SetSizePixel(maBitmap.GetSizePixel());
366
367 SAL_WARN_IF(!maAlphaMask.IsEmpty() && maBitmap.GetSizePixel() != maAlphaMask.GetSizePixel(), "vcl",
368 "BitmapEx::Crop(): size mismatch for bitmap and alpha mask.");
369 }
370
371 return bRet;
372 }
373
374 bool BitmapEx::Convert( BmpConversion eConversion )
375 {
376 return !maBitmap.IsEmpty() && maBitmap.Convert( eConversion );
377 }
378
379 void BitmapEx::Expand( sal_Int32 nDX, sal_Int32 nDY, bool bExpandTransparent )
380 {
381 bool bRet = false;
382
383 if( maBitmap.IsEmpty() )
384 return;
385
386 bRet = maBitmap.Expand( nDX, nDY );
387
388 if( bRet && !maAlphaMask.IsEmpty() )
389 {
390 Color aColor( bExpandTransparent ? COL_WHITE : COL_BLACK );
391 maAlphaMask.Expand( nDX, nDY, &aColor );
392 }
393
394 SetSizePixel(maBitmap.GetSizePixel());
395
396 SAL_WARN_IF(!maAlphaMask.IsEmpty() && maBitmap.GetSizePixel() != maAlphaMask.GetSizePixel(), "vcl",
397 "BitmapEx::Expand(): size mismatch for bitmap and alpha mask.");
398 }
399
400 bool BitmapEx::CopyPixel( const tools::Rectangle& rRectDst, const tools::Rectangle& rRectSrc,
401 const BitmapEx* pBmpExSrc )
402 {
403 bool bRet = false;
404
405 if( !pBmpExSrc || pBmpExSrc->IsEmpty() )
406 {
407 if( !maBitmap.IsEmpty() )
408 {
409 bRet = maBitmap.CopyPixel( rRectDst, rRectSrc );
410
411 if( bRet && !maAlphaMask.IsEmpty() )
412 maAlphaMask.CopyPixel( rRectDst, rRectSrc );
413 }
414 }
415 else
416 {
417 if( !maBitmap.IsEmpty() )
418 {
419 bRet = maBitmap.CopyPixel( rRectDst, rRectSrc, &pBmpExSrc->maBitmap );
420
421 if( bRet )
422 {
423 if( pBmpExSrc->IsAlpha() )
424 {
425 if( IsAlpha() )
426 // cast to use the optimized AlphaMask::CopyPixel
427 maAlphaMask.CopyPixel_AlphaOptimized( rRectDst, rRectSrc, &pBmpExSrc->maAlphaMask );
428 else
429 {
430 sal_uInt8 cBlack = 0;
431 std::unique_ptr<AlphaMask> pAlpha(new AlphaMask(GetSizePixel(), &cBlack));
432
433 maAlphaMask = pAlpha->ImplGetBitmap();
434 pAlpha.reset();
435 maAlphaMask.CopyPixel( rRectDst, rRectSrc, &pBmpExSrc->maAlphaMask );
436 }
437 }
438 else if (IsAlpha())
439 {
440 sal_uInt8 cBlack = 0;
441 const AlphaMask aAlphaSrc(pBmpExSrc->GetSizePixel(), &cBlack);
442
443 maAlphaMask.CopyPixel( rRectDst, rRectSrc, &aAlphaSrc.ImplGetBitmap() );
444 }
445 }
446 }
447 }
448
449 return bRet;
450 }
451
452 bool BitmapEx::Erase( const Color& rFillColor )
453 {
454 bool bRet = false;
455
456 if( !maBitmap.IsEmpty() )
457 {
458 bRet = maBitmap.Erase( rFillColor );
459
460 if( bRet && !maAlphaMask.IsEmpty() )
461 {
462 // Respect transparency on fill color
463 if( rFillColor.IsTransparent() )
464 {
465 const Color aFill( 255 - rFillColor.GetAlpha(), 255 - rFillColor.GetAlpha(), 255 - rFillColor.GetAlpha() );
466 maAlphaMask.Erase( aFill );
467 }
468 else
469 {
470 const Color aBlack( COL_BLACK );
471 maAlphaMask.Erase( aBlack );
472 }
473 }
474 }
475
476 return bRet;
477 }
478
479 void BitmapEx::Replace( const Color& rSearchColor, const Color& rReplaceColor )
480 {
481 if (!maBitmap.IsEmpty())
482 maBitmap.Replace( rSearchColor, rReplaceColor );
483 }
484
485 void BitmapEx::Replace( const Color* pSearchColors, const Color* pReplaceColors, size_t nColorCount )
486 {
487 if (!maBitmap.IsEmpty())
488 maBitmap.Replace( pSearchColors, pReplaceColors, nColorCount, /*pTols*/nullptr );
489 }
490
491 bool BitmapEx::Adjust( short nLuminancePercent, short nContrastPercent,
492 short nChannelRPercent, short nChannelGPercent, short nChannelBPercent,
493 double fGamma, bool bInvert, bool msoBrightness )
494 {
495 return !maBitmap.IsEmpty() && maBitmap.Adjust( nLuminancePercent, nContrastPercent,
496 nChannelRPercent, nChannelGPercent, nChannelBPercent,
497 fGamma, bInvert, msoBrightness );
498 }
499
500 void BitmapEx::Draw( OutputDevice* pOutDev, const Point& rDestPt ) const
501 {
502 pOutDev->DrawBitmapEx( rDestPt, *this );
503 }
504
505 void BitmapEx::Draw( OutputDevice* pOutDev,
506 const Point& rDestPt, const Size& rDestSize ) const
507 {
508 pOutDev->DrawBitmapEx( rDestPt, rDestSize, *this );
509 }
510
511 BitmapEx BitmapEx:: AutoScaleBitmap(BitmapEx const & aBitmap, const tools::Long aStandardSize)
512 {
513 Point aEmptyPoint(0,0);
514 double imgposX = 0;
515 double imgposY = 0;
516 BitmapEx aRet = aBitmap;
517 double imgOldWidth = aRet.GetSizePixel().Width();
518 double imgOldHeight = aRet.GetSizePixel().Height();
519
520 if (imgOldWidth >= aStandardSize || imgOldHeight >= aStandardSize)
521 {
522 sal_Int32 imgNewWidth = 0;
523 sal_Int32 imgNewHeight = 0;
524 if (imgOldWidth >= imgOldHeight)
525 {
526 imgNewWidth = aStandardSize;
527 imgNewHeight = sal_Int32(imgOldHeight / (imgOldWidth / aStandardSize) + 0.5);
528 imgposX = 0;
529 imgposY = (aStandardSize - (imgOldHeight / (imgOldWidth / aStandardSize) + 0.5)) / 2 + 0.5;
530 }
531 else
532 {
533 imgNewHeight = aStandardSize;
534 imgNewWidth = sal_Int32(imgOldWidth / (imgOldHeight / aStandardSize) + 0.5);
535 imgposY = 0;
536 imgposX = (aStandardSize - (imgOldWidth / (imgOldHeight / aStandardSize) + 0.5)) / 2 + 0.5;
537 }
538
539 Size aScaledSize( imgNewWidth, imgNewHeight );
540 aRet.Scale( aScaledSize, BmpScaleFlag::BestQuality );
541 }
542 else
543 {
544 imgposX = (aStandardSize - imgOldWidth) / 2 + 0.5;
545 imgposY = (aStandardSize - imgOldHeight) / 2 + 0.5;
546 }
547
548 Size aStdSize( aStandardSize, aStandardSize );
549 tools::Rectangle aRect(aEmptyPoint, aStdSize );
550
551 ScopedVclPtrInstance< VirtualDevice > aVirDevice(*Application::GetDefaultDevice());
552 aVirDevice->SetOutputSizePixel( aStdSize );
553 aVirDevice->SetFillColor( COL_TRANSPARENT );
554 aVirDevice->SetLineColor( COL_TRANSPARENT );
555
556 // Draw a rect into virDevice
557 aVirDevice->DrawRect( aRect );
558 Point aPointPixel( static_cast<tools::Long>(imgposX), static_cast<tools::Long>(imgposY) );
559 aVirDevice->DrawBitmapEx( aPointPixel, aRet );
560 aRet = aVirDevice->GetBitmapEx( aEmptyPoint, aStdSize );
561
562 return aRet;
563 }
564
565 sal_uInt8 BitmapEx::GetAlpha(sal_Int32 nX, sal_Int32 nY) const
566 {
567 if(maBitmap.IsEmpty())
568 return 0;
569
570 if (nX < 0 || nX >= GetSizePixel().Width() || nY < 0 || nY >= GetSizePixel().Height())
571 return 0;
572
573 if (maBitmap.getPixelFormat() == vcl::PixelFormat::N32_BPP)
574 return GetPixelColor(nX, nY).GetAlpha();
575
576 sal_uInt8 nAlpha(0);
577 if (maAlphaMask.IsEmpty())
578 {
579 // Not transparent, ergo all covered
580 nAlpha = 255;
581 }
582 else
583 {
584 Bitmap aTestBitmap(maAlphaMask);
585 Bitmap::ScopedReadAccess pRead(aTestBitmap);
586
587 if(pRead)
588 {
589 const BitmapColor aBitmapColor(pRead->GetPixel(nY, nX));
590 nAlpha = 255 - aBitmapColor.GetIndex();
591 }
592 }
593 return nAlpha;
594 }
595
596
597 Color BitmapEx::GetPixelColor(sal_Int32 nX, sal_Int32 nY) const
598 {
599 Bitmap::ScopedReadAccess pReadAccess( const_cast<Bitmap&>(maBitmap) );
600 assert(pReadAccess);
601
602 BitmapColor aColor = pReadAccess->GetColor(nY, nX);
603
604 if (IsAlpha())
605 {
606 AlphaMask aAlpha = GetAlpha();
607 AlphaMask::ScopedReadAccess pAlphaReadAccess(aAlpha);
608 aColor.SetAlpha(255 - pAlphaReadAccess->GetPixel(nY, nX).GetIndex());
609 }
610 else if (maBitmap.getPixelFormat() != vcl::PixelFormat::N32_BPP)
611 {
612 aColor.SetAlpha(255);
613 }
614 return aColor;
615 }
616
617 // Shift alpha transparent pixels between cppcanvas/ implementations
618 // and vcl in a generally grotesque and under-performing fashion
619 bool BitmapEx::Create( const css::uno::Reference< css::rendering::XBitmapCanvas > &xBitmapCanvas,
620 const Size &rSize )
621 {
622 uno::Reference< beans::XFastPropertySet > xFastPropertySet( xBitmapCanvas, uno::UNO_QUERY );
623 if( xFastPropertySet )
624 {
625 // 0 means get BitmapEx
626 uno::Any aAny = xFastPropertySet->getFastPropertyValue( 0 );
627 std::unique_ptr<BitmapEx> xBitmapEx(reinterpret_cast<BitmapEx*>(*o3tl::doAccess<sal_Int64>(aAny)));
628 if( xBitmapEx )
629 {
630 *this = *xBitmapEx;
631 return true;
632 }
633 }
634
635 std::shared_ptr<SalBitmap> pSalBmp;
636 std::shared_ptr<SalBitmap> pSalMask;
637
638 pSalBmp = ImplGetSVData()->mpDefInst->CreateSalBitmap();
639
640 Size aLocalSize(rSize);
641 if( pSalBmp->Create( xBitmapCanvas, aLocalSize ) )
642 {
643 pSalMask = ImplGetSVData()->mpDefInst->CreateSalBitmap();
644 if ( pSalMask->Create( xBitmapCanvas, aLocalSize, true ) )
645 {
646 *this = BitmapEx(Bitmap(pSalBmp), Bitmap(pSalMask) );
647 return true;
648 }
649 else
650 {
651 *this = BitmapEx(Bitmap(pSalBmp));
652 return true;
653 }
654 }
655
656 return false;
657 }
658
659 namespace
660 {
661 Bitmap impTransformBitmap(
662 const Bitmap& rSource,
663 const Size& rDestinationSize,
664 const basegfx::B2DHomMatrix& rTransform,
665 bool bSmooth)
666 {
667 Bitmap aDestination(rDestinationSize, vcl::PixelFormat::N24_BPP);
668 BitmapScopedWriteAccess xWrite(aDestination);
669
670 if(xWrite)
671 {
672 Bitmap::ScopedReadAccess xRead(const_cast< Bitmap& >(rSource));
673
674 if (xRead)
675 {
676 const Size aDestinationSizePixel(aDestination.GetSizePixel());
677 const BitmapColor aOutside(BitmapColor(0xff, 0xff, 0xff));
678
679 for(tools::Long y(0); y < aDestinationSizePixel.getHeight(); y++)
680 {
681 Scanline pScanline = xWrite->GetScanline( y );
682 for(tools::Long x(0); x < aDestinationSizePixel.getWidth(); x++)
683 {
684 const basegfx::B2DPoint aSourceCoor(rTransform * basegfx::B2DPoint(x, y));
685
686 if(bSmooth)
687 {
688 xWrite->SetPixelOnData(
689 pScanline,
690 x,
691 xRead->GetInterpolatedColorWithFallback(
692 aSourceCoor.getY(),
693 aSourceCoor.getX(),
694 aOutside));
695 }
696 else
697 {
698 // this version does the correct <= 0.0 checks, so no need
699 // to do the static_cast< sal_Int32 > self and make an error
700 xWrite->SetPixelOnData(
701 pScanline,
702 x,
703 xRead->GetColorWithFallback(
704 aSourceCoor.getY(),
705 aSourceCoor.getX(),
706 aOutside));
707 }
708 }
709 }
710 }
711 }
712 xWrite.reset();
713
714 rSource.AdaptBitCount(aDestination);
715
716 return aDestination;
717 }
718
719 /// Decides if rTransformation needs smoothing or not (e.g. 180 deg rotation doesn't need it).
720 bool implTransformNeedsSmooth(const basegfx::B2DHomMatrix& rTransformation)
721 {
722 basegfx::B2DVector aScale, aTranslate;
723 double fRotate, fShearX;
724 rTransformation.decompose(aScale, aTranslate, fRotate, fShearX);
725 if (aScale != basegfx::B2DVector(1, 1))
726 {
727 return true;
728 }
729
730 fRotate = fmod( fRotate, F_2PI );
731 if (fRotate < 0)
732 {
733 fRotate += F_2PI;
734 }
735 if (!rtl::math::approxEqual(fRotate, 0)
736 && !rtl::math::approxEqual(fRotate, F_PI2)
737 && !rtl::math::approxEqual(fRotate, F_PI)
738 && !rtl::math::approxEqual(fRotate, 3 * F_PI2))
739 {
740 return true;
741 }
742
743 if (!rtl::math::approxEqual(fShearX, 0))
744 {
745 return true;
746 }
747
748 return false;
749 }
750 } // end of anonymous namespace
751
752 BitmapEx BitmapEx::TransformBitmapEx(
753 double fWidth,
754 double fHeight,
755 const basegfx::B2DHomMatrix& rTransformation) const
756 {
757 if(fWidth <= 1 || fHeight <= 1)
758 return BitmapEx();
759
760 // force destination to 24 bit, we want to smooth output
761 const Size aDestinationSize(basegfx::fround(fWidth), basegfx::fround(fHeight));
762 bool bSmooth = implTransformNeedsSmooth(rTransformation);
763 const Bitmap aDestination(impTransformBitmap(GetBitmap(), aDestinationSize, rTransformation, bSmooth));
764
765 // create mask
766 if(IsAlpha())
767 {
768 const Bitmap aAlpha(impTransformBitmap(GetAlpha().GetBitmap(), aDestinationSize, rTransformation, bSmooth));
769 return BitmapEx(aDestination, AlphaMask(aAlpha));
770 }
771
772 return BitmapEx(aDestination);
773 }
774
775 BitmapEx BitmapEx::getTransformed(
776 const basegfx::B2DHomMatrix& rTransformation,
777 const basegfx::B2DRange& rVisibleRange,
778 double fMaximumArea) const
779 {
780 BitmapEx aRetval;
781
782 if(IsEmpty())
783 return aRetval;
784
785 const sal_uInt32 nSourceWidth(GetSizePixel().Width());
786 const sal_uInt32 nSourceHeight(GetSizePixel().Height());
787
788 if(!nSourceWidth || !nSourceHeight)
789 return aRetval;
790
791 // Get aOutlineRange
792 basegfx::B2DRange aOutlineRange(0.0, 0.0, 1.0, 1.0);
793
794 aOutlineRange.transform(rTransformation);
795
796 // create visible range from it by moving from relative to absolute
797 basegfx::B2DRange aVisibleRange(rVisibleRange);
798
799 aVisibleRange.transform(
800 basegfx::utils::createScaleTranslateB2DHomMatrix(
801 aOutlineRange.getRange(),
802 aOutlineRange.getMinimum()));
803
804 // get target size (which is visible range's size)
805 double fWidth(aVisibleRange.getWidth());
806 double fHeight(aVisibleRange.getHeight());
807
808 if(fWidth < 1.0 || fHeight < 1.0)
809 {
810 return aRetval;
811 }
812
813 // test if discrete size (pixel) maybe too big and limit it
814 const double fArea(fWidth * fHeight);
815 const bool bNeedToReduce(basegfx::fTools::more(fArea, fMaximumArea));
816 double fReduceFactor(1.0);
817
818 if(bNeedToReduce)
819 {
820 fReduceFactor = sqrt(fMaximumArea / fArea);
821 fWidth *= fReduceFactor;
822 fHeight *= fReduceFactor;
823 }
824
825 // Build complete transform from source pixels to target pixels.
826 // Start by scaling from source pixel size to unit coordinates
827 basegfx::B2DHomMatrix aTransform(
828 basegfx::utils::createScaleB2DHomMatrix(
829 1.0 / nSourceWidth,
830 1.0 / nSourceHeight));
831
832 // multiply with given transform which leads from unit coordinates inside
833 // aOutlineRange
834 aTransform = rTransformation * aTransform;
835
836 // subtract top-left of absolute VisibleRange
837 aTransform.translate(
838 -aVisibleRange.getMinX(),
839 -aVisibleRange.getMinY());
840
841 // scale to target pixels (if needed)
842 if(bNeedToReduce)
843 {
844 aTransform.scale(fReduceFactor, fReduceFactor);
845 }
846
847 // invert to get transformation from target pixel coordinates to source pixels
848 aTransform.invert();
849
850 // create bitmap using source, destination and linear back-transformation
851 aRetval = TransformBitmapEx(fWidth, fHeight, aTransform);
852
853 return aRetval;
854 }
855
856 BitmapEx BitmapEx::ModifyBitmapEx(const basegfx::BColorModifierStack& rBColorModifierStack) const
857 {
858 Bitmap aChangedBitmap(GetBitmap());
859 bool bDone(false);
860
861 for(sal_uInt32 a(rBColorModifierStack.count()); a && !bDone; )
862 {
863 const basegfx::BColorModifierSharedPtr& rModifier = rBColorModifierStack.getBColorModifier(--a);
864 const basegfx::BColorModifier_replace* pReplace = dynamic_cast< const basegfx::BColorModifier_replace* >(rModifier.get());
865
866 if(pReplace)
867 {
868 // complete replace
869 if(IsAlpha())
870 {
871 // clear bitmap with dest color
872 if (vcl::isPalettePixelFormat(aChangedBitmap.getPixelFormat()))
873 {
874 // For e.g. 8bit Bitmaps, the nearest color to the given erase color is
875 // determined and used -> this may be different from what is wanted here.
876 // Better create a new bitmap with the needed color explicitly.
877 Bitmap::ScopedReadAccess xReadAccess(aChangedBitmap);
878 OSL_ENSURE(xReadAccess, "Got no Bitmap ReadAccess ?!?");
879
880 if(xReadAccess)
881 {
882 BitmapPalette aNewPalette(xReadAccess->GetPalette());
883 aNewPalette[0] = BitmapColor(Color(pReplace->getBColor()));
884 aChangedBitmap = Bitmap(
885 aChangedBitmap.GetSizePixel(),
886 aChangedBitmap.getPixelFormat(),
887 &aNewPalette);
888 }
889 }
890 aChangedBitmap.Erase(Color(pReplace->getBColor()));
891 }
892 else
893 {
894 // erase bitmap, caller will know to paint direct
895 aChangedBitmap.SetEmpty();
896 }
897
898 bDone = true;
899 }
900 else
901 {
902 BitmapScopedWriteAccess xContent(aChangedBitmap);
903
904 if(xContent)
905 {
906 const double fConvertColor(1.0 / 255.0);
907
908 if(xContent->HasPalette())
909 {
910 const sal_uInt16 nCount(xContent->GetPaletteEntryCount());
911
912 for(sal_uInt16 b(0); b < nCount; b++)
913 {
914 const BitmapColor& rCol = xContent->GetPaletteColor(b);
915 const basegfx::BColor aBSource(
916 rCol.GetRed() * fConvertColor,
917 rCol.GetGreen() * fConvertColor,
918 rCol.GetBlue() * fConvertColor);
919 const basegfx::BColor aBDest(rModifier->getModifiedColor(aBSource));
920 xContent->SetPaletteColor(b, BitmapColor(Color(aBDest)));
921 }
922 }
923 else if(ScanlineFormat::N24BitTcBgr == xContent->GetScanlineFormat())
924 {
925 for(tools::Long y(0); y < xContent->Height(); y++)
926 {
927 Scanline pScan = xContent->GetScanline(y);
928
929 for(tools::Long x(0); x < xContent->Width(); x++)
930 {
931 const basegfx::BColor aBSource(
932 *(pScan + 2)* fConvertColor,
933 *(pScan + 1) * fConvertColor,
934 *pScan * fConvertColor);
935 const basegfx::BColor aBDest(rModifier->getModifiedColor(aBSource));
936 *pScan++ = static_cast< sal_uInt8 >(aBDest.getBlue() * 255.0);
937 *pScan++ = static_cast< sal_uInt8 >(aBDest.getGreen() * 255.0);
938 *pScan++ = static_cast< sal_uInt8 >(aBDest.getRed() * 255.0);
939 }
940 }
941 }
942 else if(ScanlineFormat::N24BitTcRgb == xContent->GetScanlineFormat())
943 {
944 for(tools::Long y(0); y < xContent->Height(); y++)
945 {
946 Scanline pScan = xContent->GetScanline(y);
947
948 for(tools::Long x(0); x < xContent->Width(); x++)
949 {
950 const basegfx::BColor aBSource(
951 *pScan * fConvertColor,
952 *(pScan + 1) * fConvertColor,
953 *(pScan + 2) * fConvertColor);
954 const basegfx::BColor aBDest(rModifier->getModifiedColor(aBSource));
955 *pScan++ = static_cast< sal_uInt8 >(aBDest.getRed() * 255.0);
956 *pScan++ = static_cast< sal_uInt8 >(aBDest.getGreen() * 255.0);
957 *pScan++ = static_cast< sal_uInt8 >(aBDest.getBlue() * 255.0);
958 }
959 }
960 }
961 else
962 {
963 for(tools::Long y(0); y < xContent->Height(); y++)
964 {
965 Scanline pScanline = xContent->GetScanline( y );
966 for(tools::Long x(0); x < xContent->Width(); x++)
967 {
968 const BitmapColor aBMCol(xContent->GetColor(y, x));
969 const basegfx::BColor aBSource(
970 static_cast<double>(aBMCol.GetRed()) * fConvertColor,
971 static_cast<double>(aBMCol.GetGreen()) * fConvertColor,
972 static_cast<double>(aBMCol.GetBlue()) * fConvertColor);
973 const basegfx::BColor aBDest(rModifier->getModifiedColor(aBSource));
974
975 xContent->SetPixelOnData(pScanline, x, BitmapColor(Color(aBDest)));
976 }
977 }
978 }
979 }
980 }
981 }
982
983 if(aChangedBitmap.IsEmpty())
984 {
985 return BitmapEx();
986 }
987 else
988 {
989 if(IsAlpha())
990 {
991 return BitmapEx(aChangedBitmap, GetAlpha());
992 }
993 else
994 {
995 return BitmapEx(aChangedBitmap);
996 }
997 }
998 }
999
1000 BitmapEx createBlendFrame(
1001 const Size& rSize,
1002 sal_uInt8 nAlpha,
1003 Color aColorTopLeft,
1004 Color aColorBottomRight)
1005 {
1006 const sal_uInt32 nW(rSize.Width());
1007 const sal_uInt32 nH(rSize.Height());
1008
1009 if(nW || nH)
1010 {
1011 Color aColTopRight(aColorTopLeft);
1012 Color aColBottomLeft(aColorTopLeft);
1013 const sal_uInt32 nDE(nW + nH);
1014
1015 aColTopRight.Merge(aColorBottomRight, 255 - sal_uInt8((nW * 255) / nDE));
1016 aColBottomLeft.Merge(aColorBottomRight, 255 - sal_uInt8((nH * 255) / nDE));
1017
1018 return createBlendFrame(rSize, nAlpha, aColorTopLeft, aColTopRight, aColorBottomRight, aColBottomLeft);
1019 }
1020
1021 return BitmapEx();
1022 }
1023
1024 BitmapEx createBlendFrame(
1025 const Size& rSize,
1026 sal_uInt8 nAlpha,
1027 Color aColorTopLeft,
1028 Color aColorTopRight,
1029 Color aColorBottomRight,
1030 Color aColorBottomLeft)
1031 {
1032 BlendFrameCache* pBlendFrameCache = ImplGetBlendFrameCache();
1033
1034 if(pBlendFrameCache->m_aLastSize == rSize
1035 && pBlendFrameCache->m_nLastAlpha == nAlpha
1036 && pBlendFrameCache->m_aLastColorTopLeft == aColorTopLeft
1037 && pBlendFrameCache->m_aLastColorTopRight == aColorTopRight
1038 && pBlendFrameCache->m_aLastColorBottomRight == aColorBottomRight
1039 && pBlendFrameCache->m_aLastColorBottomLeft == aColorBottomLeft)
1040 {
1041 return pBlendFrameCache->m_aLastResult;
1042 }
1043
1044 pBlendFrameCache->m_aLastSize = rSize;
1045 pBlendFrameCache->m_nLastAlpha = nAlpha;
1046 pBlendFrameCache->m_aLastColorTopLeft = aColorTopLeft;
1047 pBlendFrameCache->m_aLastColorTopRight = aColorTopRight;
1048 pBlendFrameCache->m_aLastColorBottomRight = aColorBottomRight;
1049 pBlendFrameCache->m_aLastColorBottomLeft = aColorBottomLeft;
1050 pBlendFrameCache->m_aLastResult.Clear();
1051
1052 const tools::Long nW(rSize.Width());
1053 const tools::Long nH(rSize.Height());
1054
1055 if(nW > 1 && nH > 1)
1056 {
1057 sal_uInt8 aEraseTrans(0xff);
1058 Bitmap aContent(rSize, vcl::PixelFormat::N24_BPP);
1059 AlphaMask aAlpha(rSize, &aEraseTrans);
1060
1061 aContent.Erase(COL_BLACK);
1062
1063 BitmapScopedWriteAccess pContent(aContent);
1064 AlphaScopedWriteAccess pAlpha(aAlpha);
1065
1066 if(pContent && pAlpha)
1067 {
1068 tools::Long x(0);
1069 tools::Long y(0);
1070 Scanline pScanContent = pContent->GetScanline( 0 );
1071 Scanline pScanAlpha = pContent->GetScanline( 0 );
1072
1073 // x == 0, y == 0, top-left corner
1074 pContent->SetPixelOnData(pScanContent, 0, aColorTopLeft);
1075 pAlpha->SetPixelOnData(pScanAlpha, 0, BitmapColor(nAlpha));
1076
1077 // y == 0, top line left to right
1078 for(x = 1; x < nW - 1; x++)
1079 {
1080 Color aMix(aColorTopLeft);
1081
1082 aMix.Merge(aColorTopRight, 255 - sal_uInt8((x * 255) / nW));
1083 pContent->SetPixelOnData(pScanContent, x, aMix);
1084 pAlpha->SetPixelOnData(pScanAlpha, x, BitmapColor(nAlpha));
1085 }
1086
1087 // x == nW - 1, y == 0, top-right corner
1088 // #i123690# Caution! When nW is 1, x == nW is possible (!)
1089 if(x < nW)
1090 {
1091 pContent->SetPixelOnData(pScanContent, x, aColorTopRight);
1092 pAlpha->SetPixelOnData(pScanAlpha, x, BitmapColor(nAlpha));
1093 }
1094
1095 // x == 0 and nW - 1, left and right line top-down
1096 for(y = 1; y < nH - 1; y++)
1097 {
1098 pScanContent = pContent->GetScanline( y );
1099 pScanAlpha = pContent->GetScanline( y );
1100 Color aMixA(aColorTopLeft);
1101
1102 aMixA.Merge(aColorBottomLeft, 255 - sal_uInt8((y * 255) / nH));
1103 pContent->SetPixelOnData(pScanContent, 0, aMixA);
1104 pAlpha->SetPixelOnData(pScanAlpha, 0, BitmapColor(nAlpha));
1105
1106 // #i123690# Caution! When nW is 1, x == nW is possible (!)
1107 if(x < nW)
1108 {
1109 Color aMixB(aColorTopRight);
1110
1111 aMixB.Merge(aColorBottomRight, 255 - sal_uInt8((y * 255) / nH));
1112 pContent->SetPixelOnData(pScanContent, x, aMixB);
1113 pAlpha->SetPixelOnData(pScanAlpha, x, BitmapColor(nAlpha));
1114 }
1115 }
1116
1117 // #i123690# Caution! When nH is 1, y == nH is possible (!)
1118 if(y < nH)
1119 {
1120 // x == 0, y == nH - 1, bottom-left corner
1121 pContent->SetPixelOnData(pScanContent, 0, aColorBottomLeft);
1122 pAlpha->SetPixelOnData(pScanAlpha, 0, BitmapColor(nAlpha));
1123
1124 // y == nH - 1, bottom line left to right
1125 for(x = 1; x < nW - 1; x++)
1126 {
1127 Color aMix(aColorBottomLeft);
1128
1129 aMix.Merge(aColorBottomRight, 255 - sal_uInt8(((x - 0)* 255) / nW));
1130 pContent->SetPixelOnData(pScanContent, x, aMix);
1131 pAlpha->SetPixelOnData(pScanAlpha, x, BitmapColor(nAlpha));
1132 }
1133
1134 // x == nW - 1, y == nH - 1, bottom-right corner
1135 // #i123690# Caution! When nW is 1, x == nW is possible (!)
1136 if(x < nW)
1137 {
1138 pContent->SetPixelOnData(pScanContent, x, aColorBottomRight);
1139 pAlpha->SetPixelOnData(pScanAlpha, x, BitmapColor(nAlpha));
1140 }
1141 }
1142
1143 pContent.reset();
1144 pAlpha.reset();
1145
1146 pBlendFrameCache->m_aLastResult = BitmapEx(aContent, aAlpha);
1147 }
1148 }
1149
1150 return pBlendFrameCache->m_aLastResult;
1151 }
1152
1153 void BitmapEx::Replace(const Color& rSearchColor,
1154 const Color& rReplaceColor,
1155 sal_uInt8 nTolerance)
1156 {
1157 maBitmap.Replace(rSearchColor, rReplaceColor, nTolerance);
1158 }
1159
1160 void BitmapEx::Replace( const Color* pSearchColors,
1161 const Color* pReplaceColors,
1162 size_t nColorCount,
1163 sal_uInt8 const * pTols )
1164 {
1165 maBitmap.Replace( pSearchColors, pReplaceColors, nColorCount, pTols );
1166 }
1167
1168 void BitmapEx::ReplaceTransparency(const Color& rColor)
1169 {
1170 if( IsAlpha() )
1171 {
1172 maBitmap.Replace( GetAlpha(), rColor );
1173 maAlphaMask = Bitmap();
1174 maBitmapSize = maBitmap.GetSizePixel();
1175 }
1176 }
1177
1178 static Bitmap DetectEdges( const Bitmap& rBmp )
1179 {
1180 constexpr sal_uInt8 cEdgeDetectThreshold = 128;
1181 const Size aSize( rBmp.GetSizePixel() );
1182 Bitmap aRetBmp;
1183
1184 if( ( aSize.Width() > 2 ) && ( aSize.Height() > 2 ) )
1185 {
1186 Bitmap aWorkBmp( rBmp );
1187
1188 if( aWorkBmp.Convert( BmpConversion::N8BitGreys ) )
1189 {
1190 bool bRet = false;
1191
1192 ScopedVclPtr<VirtualDevice> pVirDev(VclPtr<VirtualDevice>::Create());
1193 pVirDev->SetOutputSizePixel(aSize);
1194 Bitmap::ScopedReadAccess pReadAcc(aWorkBmp);
1195
1196 if( pReadAcc )
1197 {
1198 const tools::Long nWidth = aSize.Width();
1199 const tools::Long nWidth2 = nWidth - 2;
1200 const tools::Long nHeight = aSize.Height();
1201 const tools::Long nHeight2 = nHeight - 2;
1202 const tools::Long lThres2 = static_cast<tools::Long>(cEdgeDetectThreshold) * cEdgeDetectThreshold;
1203 tools::Long nSum1;
1204 tools::Long nSum2;
1205 tools::Long lGray;
1206
1207 // initialize border with white pixels
1208 pVirDev->SetLineColor( COL_WHITE );
1209 pVirDev->DrawLine( Point(), Point( nWidth - 1, 0L ) );
1210 pVirDev->DrawLine( Point( nWidth - 1, 0L ), Point( nWidth - 1, nHeight - 1 ) );
1211 pVirDev->DrawLine( Point( nWidth - 1, nHeight - 1 ), Point( 0L, nHeight - 1 ) );
1212 pVirDev->DrawLine( Point( 0, nHeight - 1 ), Point() );
1213
1214 for( tools::Long nY = 0, nY1 = 1, nY2 = 2; nY < nHeight2; nY++, nY1++, nY2++ )
1215 {
1216 Scanline pScanlineRead = pReadAcc->GetScanline( nY );
1217 Scanline pScanlineRead1 = pReadAcc->GetScanline( nY1 );
1218 Scanline pScanlineRead2 = pReadAcc->GetScanline( nY2 );
1219 for( tools::Long nX = 0, nXDst = 1, nXTmp; nX < nWidth2; nX++, nXDst++ )
1220 {
1221 nXTmp = nX;
1222
1223 nSum2 = pReadAcc->GetIndexFromData( pScanlineRead, nXTmp++ );
1224 nSum1 = -nSum2;
1225 nSum2 += static_cast<tools::Long>(pReadAcc->GetIndexFromData( pScanlineRead, nXTmp++ )) << 1;
1226 lGray = pReadAcc->GetIndexFromData( pScanlineRead, nXTmp );
1227 nSum1 += lGray;
1228 nSum2 += lGray;
1229
1230 nSum1 += static_cast<tools::Long>(pReadAcc->GetIndexFromData( pScanlineRead1, nXTmp )) << 1;
1231 nXTmp -= 2;
1232 nSum1 -= static_cast<tools::Long>(pReadAcc->GetIndexFromData( pScanlineRead1, nXTmp )) << 1;
1233
1234 lGray = -static_cast<tools::Long>(pReadAcc->GetIndexFromData( pScanlineRead2, nXTmp++ ));
1235 nSum1 += lGray;
1236 nSum2 += lGray;
1237 nSum2 -= static_cast<tools::Long>(pReadAcc->GetIndexFromData( pScanlineRead2, nXTmp++ )) << 1;
1238 lGray = static_cast<tools::Long>(pReadAcc->GetIndexFromData( pScanlineRead2, nXTmp ));
1239 nSum1 += lGray;
1240 nSum2 -= lGray;
1241
1242 if( ( nSum1 * nSum1 + nSum2 * nSum2 ) < lThres2 )
1243 pVirDev->DrawPixel( Point(nXDst, nY), COL_WHITE );
1244 else
1245 pVirDev->DrawPixel( Point(nXDst, nY), COL_BLACK );
1246 }
1247 }
1248
1249 bRet = true;
1250 }
1251
1252 pReadAcc.reset();
1253
1254 if( bRet )
1255 aRetBmp = pVirDev->GetBitmap(Point(0,0), aSize);
1256 }
1257 }
1258
1259 if( aRetBmp.IsEmpty() )
1260 aRetBmp = rBmp;
1261 else
1262 {
1263 aRetBmp.SetPrefMapMode( rBmp.GetPrefMapMode() );
1264 aRetBmp.SetPrefSize( rBmp.GetPrefSize() );
1265 }
1266
1267 return aRetBmp;
1268 }
1269
1270 /** Get contours in image */
1271 tools::Polygon BitmapEx::GetContour( bool bContourEdgeDetect,
1272 const tools::Rectangle* pWorkRectPixel )
1273 {
1274 Bitmap aWorkBmp;
1275 tools::Polygon aRetPoly;
1276 tools::Rectangle aWorkRect( Point(), maBitmap.GetSizePixel() );
1277
1278 if( pWorkRectPixel )
1279 aWorkRect.Intersection( *pWorkRectPixel );
1280
1281 aWorkRect.Justify();
1282
1283 if( ( aWorkRect.GetWidth() > 4 ) && ( aWorkRect.GetHeight() > 4 ) )
1284 {
1285 // if the flag is set, we need to detect edges
1286 if( bContourEdgeDetect )
1287 aWorkBmp = DetectEdges( maBitmap );
1288 else
1289 aWorkBmp = maBitmap;
1290
1291 BitmapReadAccess* pAcc = aWorkBmp.AcquireReadAccess();
1292
1293 const tools::Long nWidth = pAcc ? pAcc->Width() : 0;
1294 const tools::Long nHeight = pAcc ? pAcc->Height() : 0;
1295
1296 if (pAcc && nWidth && nHeight)
1297 {
1298 const Size& rPrefSize = aWorkBmp.GetPrefSize();
1299 const double fFactorX = static_cast<double>(rPrefSize.Width()) / nWidth;
1300 const double fFactorY = static_cast<double>(rPrefSize.Height()) / nHeight;
1301 const tools::Long nStartX1 = aWorkRect.Left() + 1;
1302 const tools::Long nEndX1 = aWorkRect.Right();
1303 const tools::Long nStartX2 = nEndX1 - 1;
1304 const tools::Long nStartY1 = aWorkRect.Top() + 1;
1305 const tools::Long nEndY1 = aWorkRect.Bottom();
1306 std::unique_ptr<Point[]> pPoints1;
1307 std::unique_ptr<Point[]> pPoints2;
1308 tools::Long nX, nY;
1309 sal_uInt16 nPolyPos = 0;
1310 const BitmapColor aBlack = pAcc->GetBestMatchingColor( COL_BLACK );
1311
1312 pPoints1.reset(new Point[ nHeight ]);
1313 pPoints2.reset(new Point[ nHeight ]);
1314
1315 for ( nY = nStartY1; nY < nEndY1; nY++ )
1316 {
1317 nX = nStartX1;
1318 Scanline pScanline = pAcc->GetScanline( nY );
1319
1320 // scan row from left to right
1321 while( nX < nEndX1 )
1322 {
1323 if( aBlack == pAcc->GetPixelFromData( pScanline, nX ) )
1324 {
1325 pPoints1[ nPolyPos ] = Point( nX, nY );
1326 nX = nStartX2;
1327
1328 // this loop always breaks eventually as there is at least one pixel
1329 while( true )
1330 {
1331 if( aBlack == pAcc->GetPixelFromData( pScanline, nX ) )
1332 {
1333 pPoints2[ nPolyPos ] = Point( nX, nY );
1334 break;
1335 }
1336
1337 nX--;
1338 }
1339
1340 nPolyPos++;
1341 break;
1342 }
1343
1344 nX++;
1345 }
1346 }
1347
1348 const sal_uInt16 nNewSize1 = nPolyPos << 1;
1349
1350 aRetPoly = tools::Polygon( nPolyPos, pPoints1.get() );
1351 aRetPoly.SetSize( nNewSize1 + 1 );
1352 aRetPoly[ nNewSize1 ] = aRetPoly[ 0 ];
1353
1354 for( sal_uInt16 j = nPolyPos; nPolyPos < nNewSize1; )
1355 aRetPoly[ nPolyPos++ ] = pPoints2[ --j ];
1356
1357 if( ( fFactorX != 0. ) && ( fFactorY != 0. ) )
1358 aRetPoly.Scale( fFactorX, fFactorY );
1359 }
1360
1361 Bitmap::ReleaseAccess(pAcc);
1362 }
1363
1364 return aRetPoly;
1365 }
1366
1367 void BitmapEx::setAlphaFrom( sal_uInt8 cIndexFrom, sal_Int8 nAlphaTo )
1368 {
1369 AlphaMask aAlphaMask(GetAlpha());
1370 BitmapScopedWriteAccess pWriteAccess(aAlphaMask);
1371 Bitmap::ScopedReadAccess pReadAccess(maBitmap);
1372 assert( pReadAccess.get() && pWriteAccess.get() );
1373 if ( !(pReadAccess.get() && pWriteAccess.get()) )
1374 return;
1375
1376 for ( tools::Long nY = 0; nY < pReadAccess->Height(); nY++ )
1377 {
1378 Scanline pScanline = pWriteAccess->GetScanline( nY );
1379 Scanline pScanlineRead = pReadAccess->GetScanline( nY );
1380 for ( tools::Long nX = 0; nX < pReadAccess->Width(); nX++ )
1381 {
1382 const sal_uInt8 cIndex = pReadAccess->GetPixelFromData( pScanlineRead, nX ).GetIndex();
1383 if ( cIndex == cIndexFrom )
1384 pWriteAccess->SetPixelOnData( pScanline, nX, BitmapColor(nAlphaTo) );
1385 }
1386 }
1387 *this = BitmapEx( GetBitmap(), aAlphaMask );
1388 }
1389
1390 void BitmapEx::AdjustTransparency(sal_uInt8 cTrans)
1391 {
1392 AlphaMask aAlpha;
1393
1394 if (!IsAlpha())
1395 {
1396 aAlpha = AlphaMask(GetSizePixel(), &cTrans);
1397 }
1398 else
1399 {
1400 aAlpha = GetAlpha();
1401 BitmapScopedWriteAccess pA(aAlpha);
1402 assert(pA);
1403
1404 if( !pA )
1405 return;
1406
1407 sal_uLong nTrans = cTrans, nNewTrans;
1408 const tools::Long nWidth = pA->Width(), nHeight = pA->Height();
1409
1410 if( pA->GetScanlineFormat() == ScanlineFormat::N8BitPal )
1411 {
1412 for( tools::Long nY = 0; nY < nHeight; nY++ )
1413 {
1414 Scanline pAScan = pA->GetScanline( nY );
1415
1416 for( tools::Long nX = 0; nX < nWidth; nX++ )
1417 {
1418 nNewTrans = nTrans + *pAScan;
1419 *pAScan++ = static_cast<sal_uInt8>( ( nNewTrans & 0xffffff00 ) ? 255 : nNewTrans );
1420 }
1421 }
1422 }
1423 else
1424 {
1425 BitmapColor aAlphaValue( 0 );
1426
1427 for( tools::Long nY = 0; nY < nHeight; nY++ )
1428 {
1429 Scanline pScanline = pA->GetScanline( nY );
1430 for( tools::Long nX = 0; nX < nWidth; nX++ )
1431 {
1432 nNewTrans = nTrans + pA->GetIndexFromData( pScanline, nX );
1433 aAlphaValue.SetIndex( static_cast<sal_uInt8>( ( nNewTrans & 0xffffff00 ) ? 255 : nNewTrans ) );
1434 pA->SetPixelOnData( pScanline, nX, aAlphaValue );
1435 }
1436 }
1437 }
1438 }
1439 *this = BitmapEx( GetBitmap(), aAlpha );
1440 }
1441
1442 void BitmapEx::CombineMaskOr(Color maskColor, sal_uInt8 nTol)
1443 {
1444 Bitmap aNewMask = maBitmap.CreateMask( maskColor, nTol );
1445 if ( IsAlpha() )
1446 aNewMask.CombineSimple( maAlphaMask, BmpCombine::Or );
1447 maAlphaMask = aNewMask;
1448 }
1449
1450 /**
1451 * Retrieves the color model data we need for the XImageConsumer stuff.
1452 */
1453 void BitmapEx::GetColorModel(css::uno::Sequence< sal_Int32 >& rRGBPalette,
1454 sal_uInt32& rnRedMask, sal_uInt32& rnGreenMask, sal_uInt32& rnBlueMask, sal_uInt32& rnAlphaMask, sal_uInt32& rnTransparencyIndex,
1455 sal_uInt32& rnWidth, sal_uInt32& rnHeight, sal_uInt8& rnBitCount)
1456 {
1457 Bitmap::ScopedReadAccess pReadAccess( maBitmap );
1458 assert( pReadAccess );
1459
1460 if( pReadAccess->HasPalette() )
1461 {
1462 sal_uInt16 nPalCount = pReadAccess->GetPaletteEntryCount();
1463
1464 if( nPalCount )
1465 {
1466 rRGBPalette = css::uno::Sequence< sal_Int32 >( nPalCount + 1 );
1467
1468 sal_Int32* pTmp = rRGBPalette.getArray();
1469
1470 for( sal_uInt32 i = 0; i < nPalCount; i++, pTmp++ )
1471 {
1472 const BitmapColor& rCol = pReadAccess->GetPaletteColor( static_cast<sal_uInt16>(i) );
1473
1474 *pTmp = static_cast<sal_Int32>(rCol.GetRed()) << sal_Int32(24);
1475 *pTmp |= static_cast<sal_Int32>(rCol.GetGreen()) << sal_Int32(16);
1476 *pTmp |= static_cast<sal_Int32>(rCol.GetBlue()) << sal_Int32(8);
1477 *pTmp |= sal_Int32(0x000000ffL);
1478 }
1479
1480 if( IsAlpha() )
1481 {
1482 // append transparent entry
1483 *pTmp = sal_Int32(0xffffff00L);
1484 rnTransparencyIndex = nPalCount;
1485 nPalCount++;
1486 }
1487 else
1488 rnTransparencyIndex = 0;
1489 }
1490 }
1491 else
1492 {
1493 rnRedMask = 0xff000000UL;
1494 rnGreenMask = 0x00ff0000UL;
1495 rnBlueMask = 0x0000ff00UL;
1496 rnAlphaMask = 0x000000ffUL;
1497 rnTransparencyIndex = 0;
1498 }
1499
1500 rnWidth = pReadAccess->Width();
1501 rnHeight = pReadAccess->Height();
1502 rnBitCount = pReadAccess->GetBitCount();
1503 }
1504
1505 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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