vcl/source/helper/canvastools.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
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   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 <cppuhelper/compbase.hxx>
  21
  22 #include <com/sun/star/geometry/RealSize2D.hpp>
  23 #include <com/sun/star/geometry/RealPoint2D.hpp>
  24 #include <com/sun/star/geometry/RealRectangle2D.hpp>
  25 #include <com/sun/star/geometry/IntegerSize2D.hpp>
  26 #include <com/sun/star/geometry/IntegerPoint2D.hpp>
  27 #include <com/sun/star/geometry/IntegerRectangle2D.hpp>
  28 #include <com/sun/star/geometry/RealBezierSegment2D.hpp>
  29
  30 #include <com/sun/star/rendering/ColorSpaceType.hpp>
  31 #include <com/sun/star/rendering/RenderingIntent.hpp>
  32 #include <com/sun/star/rendering/XGraphicDevice.hpp>
  33 #include <com/sun/star/rendering/XBitmap.hpp>
  34 #include <com/sun/star/rendering/XPolyPolygon2D.hpp>
  35 #include <com/sun/star/rendering/IntegerBitmapLayout.hpp>
  36 #include <com/sun/star/rendering/XIntegerBitmap.hpp>
  37 #include <com/sun/star/rendering/ColorComponentTag.hpp>
  38
  39 #include <basegfx/matrix/b2dhommatrix.hxx>
  40 #include <basegfx/vector/b2dsize.hxx>
  41 #include <basegfx/point/b2dpoint.hxx>
  42 #include <basegfx/range/b2drectangle.hxx>
  43 #include <basegfx/vector/b2isize.hxx>
  44 #include <basegfx/point/b2ipoint.hxx>
  45 #include <basegfx/range/b2irectangle.hxx>
  46 #include <basegfx/polygon/b2dpolygon.hxx>
  47 #include <basegfx/tools/canvastools.hxx>
  48 #include <basegfx/polygon/b2dpolypolygon.hxx>
  49
  50 #include <tools/poly.hxx>
  51 #include <tools/diagnose_ex.h>
  52 #include <rtl/uuid.h>
  53
  54 #include <vcl/salbtype.hxx>
  55 #include <vcl/bitmapaccess.hxx>
  56 #include <vcl/bitmapex.hxx>
  57
  58 #include <canvasbitmap.hxx>
  59 #include <vcl/canvastools.hxx>
  60
  61 using namespace ::com::sun::star;
  62
  63 namespace vcl
  64 {
  65     namespace unotools
  66     {
  67         uno::Reference< rendering::XBitmap > xBitmapFromBitmapEx( const uno::Reference< rendering::XGraphicDevice >&    /*xGraphicDevice*/,
  68                                                                   const ::BitmapEx&                                     inputBitmap )
  69         {
  70             SAL_INFO( "vcl.helper", "vcl::unotools::xBitmapFromBitmapEx()" );
  71
  72             return new vcl::unotools::VclCanvasBitmap( inputBitmap );
  73         }
  74
  75         namespace
  76         {
  77             inline bool equalsLayout( const rendering::IntegerBitmapLayout& rLHS,
  78                                     const rendering::IntegerBitmapLayout& rRHS )
  79             {
  80                 return
  81                     rLHS.ScanLineBytes       == rRHS.ScanLineBytes &&
  82                     rLHS.ScanLineStride      == rRHS.ScanLineStride &&
  83                     rLHS.PlaneStride         == rRHS.PlaneStride &&
  84                     rLHS.ColorSpace          == rRHS.ColorSpace &&
  85                     rLHS.Palette             == rRHS.Palette &&
  86                     rLHS.IsMsbFirst          == rRHS.IsMsbFirst;
  87             }
  88             bool readBmp( sal_Int32                                                  nWidth,
  89                           sal_Int32                                                  nHeight,
  90                           const rendering::IntegerBitmapLayout&                      rLayout,
  91                           const uno::Reference< rendering::XIntegerReadOnlyBitmap >& xInputBitmap,
  92                           Bitmap::ScopedWriteAccess&                                   rWriteAcc,
  93                           Bitmap::ScopedWriteAccess&                                   rAlphaAcc )
  94             {
  95                 rendering::IntegerBitmapLayout      aCurrLayout;
  96                 geometry::IntegerRectangle2D        aRect;
  97                 uno::Sequence<sal_Int8>             aPixelData;
  98                 uno::Sequence<rendering::RGBColor>  aRGBColors;
  99                 uno::Sequence<rendering::ARGBColor> aARGBColors;
 100
 101                 for( aRect.Y1=0; aRect.Y1<nHeight; ++aRect.Y1 )
 102                 {
 103                     aRect.X1 = 0; aRect.X2 = nWidth; aRect.Y2 = aRect.Y1+1;
 104                     try
 105                     {
 106                         aPixelData = xInputBitmap->getData(aCurrLayout,aRect);
 107                     }
 108                     catch( rendering::VolatileContentDestroyedException& )
 109                     {
 110                         // re-read bmp from the start
 111                         return false;
 112                     }
 113                     if( !equalsLayout(aCurrLayout, rLayout) )
 114                         return false; // re-read bmp from the start
 115
 116                     if( rAlphaAcc.get() )
 117                     {
 118                         // read ARGB color
 119                         aARGBColors = rLayout.ColorSpace->convertIntegerToARGB(aPixelData);
 120
 121                         if( rWriteAcc->HasPalette() )
 122                         {
 123                             for( sal_Int32 x=0; x<nWidth; ++x )
 124                             {
 125                                 const rendering::ARGBColor& rColor=aARGBColors[x];
 126                                 rWriteAcc->SetPixelIndex( aRect.Y1, x,
 127                                                      (sal_uInt8) rWriteAcc->GetBestPaletteIndex(
 128                                                          BitmapColor( toByteColor(rColor.Red),
 129                                                                       toByteColor(rColor.Green),
 130                                                                       toByteColor(rColor.Blue))) );
 131                                 rAlphaAcc->SetPixel( aRect.Y1, x,
 132                                                      BitmapColor( 255 - toByteColor(rColor.Alpha) ));
 133                             }
 134                         }
 135                         else
 136                         {
 137                             for( sal_Int32 x=0; x<nWidth; ++x )
 138                             {
 139                                 const rendering::ARGBColor& rColor=aARGBColors[x];
 140                                 rWriteAcc->SetPixel( aRect.Y1, x,
 141                                                      BitmapColor( toByteColor(rColor.Red),
 142                                                                   toByteColor(rColor.Green),
 143                                                                   toByteColor(rColor.Blue) ));
 144                                 rAlphaAcc->SetPixel( aRect.Y1, x,
 145                                                      BitmapColor( 255 - toByteColor(rColor.Alpha) ));
 146                             }
 147                         }
 148                     }
 149                     else
 150                     {
 151                         // read RGB color
 152                         aRGBColors = rLayout.ColorSpace->convertIntegerToRGB(aPixelData);
 153                         if( rWriteAcc->HasPalette() )
 154                         {
 155                             for( sal_Int32 x=0; x<nWidth; ++x )
 156                             {
 157                                 const rendering::RGBColor& rColor=aRGBColors[x];
 158                                 rWriteAcc->SetPixelIndex( aRect.Y1, x,
 159                                                      (sal_uInt8) rWriteAcc->GetBestPaletteIndex(
 160                                                          BitmapColor( toByteColor(rColor.Red),
 161                                                                       toByteColor(rColor.Green),
 162                                                                       toByteColor(rColor.Blue))) );
 163                             }
 164                         }
 165                         else
 166                         {
 167                             for( sal_Int32 x=0; x<nWidth; ++x )
 168                             {
 169                                 const rendering::RGBColor& rColor=aRGBColors[x];
 170                                 rWriteAcc->SetPixel( aRect.Y1, x,
 171                                                      BitmapColor( toByteColor(rColor.Red),
 172                                                                   toByteColor(rColor.Green),
 173                                                                   toByteColor(rColor.Blue) ));
 174                             }
 175                         }
 176                     }
 177                 }
 178
 179                 return true;
 180             }
 181         }
 182
 183         ::BitmapEx bitmapExFromXBitmap( const uno::Reference< rendering::XIntegerReadOnlyBitmap >& xInputBitmap )
 184         {
 185             SAL_INFO( "vcl.helper", "vcl::unotools::bitmapExFromXBitmap()" );
 186
 187             if( !xInputBitmap.is() )
 188                 return ::BitmapEx();
 189
 190             // tunnel directly for known implementation
 191             VclCanvasBitmap* pImplBitmap = dynamic_cast<VclCanvasBitmap*>(xInputBitmap.get());
 192             if( pImplBitmap )
 193                 return pImplBitmap->getBitmapEx();
 194
 195             // retrieve data via UNO interface
 196
 197             // volatile bitmaps are a bit more complicated to read
 198             // from..
 199             uno::Reference<rendering::XVolatileBitmap> xVolatileBitmap(
 200                 xInputBitmap, uno::UNO_QUERY);
 201
 202             // loop a few times, until successfully read (for XVolatileBitmap)
 203             for( int i=0; i<10; ++i )
 204             {
 205                 sal_Int32 nDepth=0;
 206                 sal_Int32 nAlphaDepth=0;
 207                 const rendering::IntegerBitmapLayout aLayout(
 208                     xInputBitmap->getMemoryLayout());
 209
 210                 OSL_ENSURE(aLayout.ColorSpace.is(),
 211                            "Cannot convert image without color space!");
 212                 if( !aLayout.ColorSpace.is() )
 213                     return ::BitmapEx();
 214
 215                 nDepth = aLayout.ColorSpace->getBitsPerPixel();
 216
 217                 if( xInputBitmap->hasAlpha() )
 218                 {
 219                     // determine alpha channel depth
 220                     const uno::Sequence<sal_Int8> aTags(
 221                         aLayout.ColorSpace->getComponentTags() );
 222                     const sal_Int8* pStart(aTags.getConstArray());
 223                     const std::size_t  nLen(aTags.getLength());
 224                     const sal_Int8* pEnd(pStart+nLen);
 225
 226                     const std::ptrdiff_t nAlphaIndex =
 227                         std::find(pStart,pEnd,
 228                                   rendering::ColorComponentTag::ALPHA) - pStart;
 229
 230                     if( nAlphaIndex < sal::static_int_cast<std::ptrdiff_t>(nLen) )
 231                     {
 232                         nAlphaDepth = aLayout.ColorSpace->getComponentBitCounts()[nAlphaIndex] > 1 ? 8 : 1;
 233                         nDepth -= nAlphaDepth;
 234                     }
 235                 }
 236
 237                 BitmapPalette aPalette;
 238                 if( aLayout.Palette.is() )
 239                 {
 240                     uno::Reference< rendering::XColorSpace > xPaletteColorSpace(
 241                         aLayout.Palette->getColorSpace());
 242                     ENSURE_OR_THROW(xPaletteColorSpace.is(),
 243                                     "Palette without color space");
 244
 245                     const sal_Int32 nEntryCount( aLayout.Palette->getNumberOfEntries() );
 246                     if( nEntryCount <= 256 )
 247                     {
 248                         if( nEntryCount <= 2 )
 249                             nDepth = 1;
 250                         else
 251                             nDepth = 8;
 252
 253                         const sal_uInt16 nPaletteEntries(
 254                             sal::static_int_cast<sal_uInt16>(
 255                                 std::min(sal_Int32(255), nEntryCount)));
 256
 257                         // copy palette entries
 258                         aPalette.SetEntryCount(nPaletteEntries);
 259                         uno::Reference<rendering::XBitmapPalette> xPalette( aLayout.Palette );
 260                         uno::Reference<rendering::XColorSpace>    xPalColorSpace( xPalette->getColorSpace() );
 261
 262                         uno::Sequence<double> aPaletteEntry;
 263                         for( sal_uInt16 j=0; j<nPaletteEntries; ++j )
 264                         {
 265                             if( !xPalette->getIndex(aPaletteEntry,j) &&
 266                                 nAlphaDepth == 0 )
 267                             {
 268                                 nAlphaDepth = 1;
 269                             }
 270                             uno::Sequence<rendering::RGBColor> aColors=xPalColorSpace->convertToRGB(aPaletteEntry);
 271                             ENSURE_OR_THROW(aColors.getLength() == 1,
 272                                             "Palette returned more or less than one entry");
 273                             const rendering::RGBColor& rColor=aColors[0];
 274                             aPalette[j] = BitmapColor(toByteColor(rColor.Red),
 275                                                       toByteColor(rColor.Green),
 276                                                       toByteColor(rColor.Blue));
 277                         }
 278                     }
 279                 }
 280
 281                 const ::Size aPixelSize(
 282                     sizeFromIntegerSize2D(xInputBitmap->getSize()));
 283
 284                 // normalize bitcount
 285                 nDepth =
 286                     ( nDepth <= 1 ) ? 1 :
 287                     ( nDepth <= 4 ) ? 4 :
 288                     ( nDepth <= 8 ) ? 8 : 24;
 289
 290                 ::Bitmap aBitmap( aPixelSize,
 291                                   sal::static_int_cast<sal_uInt16>(nDepth),
 292                                   aLayout.Palette.is() ? &aPalette : nullptr );
 293                 ::Bitmap aAlpha;
 294                 if( nAlphaDepth )
 295                     aAlpha = ::Bitmap( aPixelSize,
 296                                        sal::static_int_cast<sal_uInt16>(nAlphaDepth),
 297                                        &::Bitmap::GetGreyPalette(
 298                                            sal::static_int_cast<sal_uInt16>(1L << nAlphaDepth)) );
 299
 300                 { // limit scoped access
 301                     Bitmap::ScopedWriteAccess pWriteAccess( aBitmap );
 302                     Bitmap::ScopedWriteAccess pAlphaWriteAccess( nAlphaDepth ? aAlpha.AcquireWriteAccess() : nullptr,
 303                                                                aAlpha );
 304
 305                     ENSURE_OR_THROW(pWriteAccess.get() != nullptr,
 306                                     "Cannot get write access to bitmap");
 307
 308                     const sal_Int32 nWidth(aPixelSize.Width());
 309                     const sal_Int32 nHeight(aPixelSize.Height());
 310
 311                     if( !readBmp(nWidth,nHeight,aLayout,xInputBitmap,
 312                                  pWriteAccess,pAlphaWriteAccess) )
 313                         continue;
 314                 } // limit scoped access
 315
 316                 if( nAlphaDepth )
 317                     return ::BitmapEx( aBitmap,
 318                                        AlphaMask( aAlpha ) );
 319                 else
 320                     return ::BitmapEx( aBitmap );
 321             }
 322
 323             // failed to read data 10 times - bail out
 324             return ::BitmapEx();
 325         }
 326
 327         geometry::RealSize2D size2DFromSize( const Size& rSize )
 328         {
 329             return geometry::RealSize2D( rSize.Width(),
 330                                          rSize.Height() );
 331         }
 332
 333         Size sizeFromRealSize2D( const geometry::RealSize2D& rSize )
 334         {
 335             return Size( static_cast<long>(rSize.Width + .5),
 336                          static_cast<long>(rSize.Height + .5) );
 337         }
 338
 339         ::Size sizeFromB2DSize( const basegfx::B2DVector& rVec )
 340         {
 341             return ::Size( FRound( rVec.getX() ),
 342                            FRound( rVec.getY() ) );
 343         }
 344
 345         ::Point pointFromB2DPoint( const basegfx::B2DPoint& rPoint )
 346         {
 347             return ::Point( FRound( rPoint.getX() ),
 348                             FRound( rPoint.getY() ) );
 349         }
 350
 351         ::Rectangle rectangleFromB2DRectangle( const basegfx::B2DRange& rRect )
 352         {
 353             return ::Rectangle( FRound( rRect.getMinX() ),
 354                                 FRound( rRect.getMinY() ),
 355                                 FRound( rRect.getMaxX() ),
 356                                 FRound( rRect.getMaxY() ) );
 357         }
 358
 359         Point pointFromB2IPoint( const basegfx::B2IPoint& rPoint )
 360         {
 361             return ::Point( rPoint.getX(),
 362                             rPoint.getY() );
 363         }
 364
 365         Rectangle rectangleFromB2IRectangle( const basegfx::B2IRange& rRect )
 366         {
 367             return ::Rectangle( rRect.getMinX(),
 368                                 rRect.getMinY(),
 369                                 rRect.getMaxX(),
 370                                 rRect.getMaxY() );
 371         }
 372
 373         basegfx::B2DVector b2DSizeFromSize( const ::Size& rSize )
 374         {
 375             return basegfx::B2DVector( rSize.Width(),
 376                                          rSize.Height() );
 377         }
 378
 379         basegfx::B2DPoint b2DPointFromPoint( const ::Point& rPoint )
 380         {
 381             return basegfx::B2DPoint( rPoint.X(),
 382                                         rPoint.Y() );
 383         }
 384
 385         basegfx::B2DRange b2DRectangleFromRectangle( const ::Rectangle& rRect )
 386         {
 387             return basegfx::B2DRange( rRect.Left(),
 388                                         rRect.Top(),
 389                                         rRect.Right(),
 390                                         rRect.Bottom() );
 391         }
 392
 393         geometry::IntegerSize2D integerSize2DFromSize( const Size& rSize )
 394         {
 395             return geometry::IntegerSize2D( rSize.Width(),
 396                                             rSize.Height() );
 397         }
 398
 399         Size sizeFromIntegerSize2D( const geometry::IntegerSize2D& rSize )
 400         {
 401             return Size( rSize.Width,
 402                          rSize.Height );
 403         }
 404
 405         Point pointFromIntegerPoint2D( const geometry::IntegerPoint2D& rPoint )
 406         {
 407             return Point( rPoint.X,
 408                           rPoint.Y );
 409         }
 410
 411         Rectangle rectangleFromIntegerRectangle2D( const geometry::IntegerRectangle2D& rRectangle )
 412         {
 413             return Rectangle( rRectangle.X1, rRectangle.Y1,
 414                               rRectangle.X2, rRectangle.Y2 );
 415         }
 416
 417         namespace
 418         {
 419             class StandardColorSpace : public cppu::WeakImplHelper< css::rendering::XColorSpace >
 420             {
 421             private:
 422                 uno::Sequence< sal_Int8 > m_aComponentTags;
 423
 424                 virtual ::sal_Int8 SAL_CALL getType(  ) throw (uno::RuntimeException, std::exception) override
 425                 {
 426                     return rendering::ColorSpaceType::RGB;
 427                 }
 428                 virtual uno::Sequence< ::sal_Int8 > SAL_CALL getComponentTags(  ) throw (uno::RuntimeException, std::exception) override
 429                 {
 430                     return m_aComponentTags;
 431                 }
 432                 virtual ::sal_Int8 SAL_CALL getRenderingIntent(  ) throw (uno::RuntimeException, std::exception) override
 433                 {
 434                     return rendering::RenderingIntent::PERCEPTUAL;
 435                 }
 436                 virtual uno::Sequence< beans::PropertyValue > SAL_CALL getProperties(  ) throw (uno::RuntimeException, std::exception) override
 437                 {
 438                     return uno::Sequence< beans::PropertyValue >();
 439                 }
 440                 virtual uno::Sequence< double > SAL_CALL convertColorSpace( const uno::Sequence< double >& deviceColor,
 441                                                                             const uno::Reference< rendering::XColorSpace >& targetColorSpace ) throw (lang::IllegalArgumentException,
 442                                                                                                                                                       uno::RuntimeException, std::exception) override
 443                 {
 444                     // TODO(P3): if we know anything about target
 445                     // colorspace, this can be greatly sped up
 446                     uno::Sequence<rendering::ARGBColor> aIntermediate(
 447                         convertToARGB(deviceColor));
 448                     return targetColorSpace->convertFromARGB(aIntermediate);
 449                 }
 450                 virtual uno::Sequence< rendering::RGBColor > SAL_CALL convertToRGB( const uno::Sequence< double >& deviceColor ) throw (lang::IllegalArgumentException, uno::RuntimeException, std::exception) override
 451                 {
 452                     const double*  pIn( deviceColor.getConstArray() );
 453                     const std::size_t nLen( deviceColor.getLength() );
 454                     ENSURE_ARG_OR_THROW2(nLen%4==0,
 455                                          "number of channels no multiple of 4",
 456                                          static_cast<rendering::XColorSpace*>(this), 0);
 457
 458                     uno::Sequence< rendering::RGBColor > aRes(nLen/4);
 459                     rendering::RGBColor* pOut( aRes.getArray() );
 460                     for( std::size_t i=0; i<nLen; i+=4 )
 461                     {
 462                         *pOut++ = rendering::RGBColor(pIn[0],pIn[1],pIn[2]);
 463                         pIn += 4;
 464                     }
 465                     return aRes;
 466                 }
 467                 virtual uno::Sequence< rendering::ARGBColor > SAL_CALL convertToARGB( const uno::Sequence< double >& deviceColor ) throw (lang::IllegalArgumentException, uno::RuntimeException, std::exception) override
 468                 {
 469                     const double*  pIn( deviceColor.getConstArray() );
 470                     const std::size_t nLen( deviceColor.getLength() );
 471                     ENSURE_ARG_OR_THROW2(nLen%4==0,
 472                                          "number of channels no multiple of 4",
 473                                          static_cast<rendering::XColorSpace*>(this), 0);
 474
 475                     uno::Sequence< rendering::ARGBColor > aRes(nLen/4);
 476                     rendering::ARGBColor* pOut( aRes.getArray() );
 477                     for( std::size_t i=0; i<nLen; i+=4 )
 478                     {
 479                         *pOut++ = rendering::ARGBColor(pIn[3],pIn[0],pIn[1],pIn[2]);
 480                         pIn += 4;
 481                     }
 482                     return aRes;
 483                 }
 484                 virtual uno::Sequence< rendering::ARGBColor > SAL_CALL convertToPARGB( const uno::Sequence< double >& deviceColor ) throw (lang::IllegalArgumentException, uno::RuntimeException, std::exception) override
 485                 {
 486                     const double*  pIn( deviceColor.getConstArray() );
 487                     const std::size_t nLen( deviceColor.getLength() );
 488                     ENSURE_ARG_OR_THROW2(nLen%4==0,
 489                                          "number of channels no multiple of 4",
 490                                          static_cast<rendering::XColorSpace*>(this), 0);
 491
 492                     uno::Sequence< rendering::ARGBColor > aRes(nLen/4);
 493                     rendering::ARGBColor* pOut( aRes.getArray() );
 494                     for( std::size_t i=0; i<nLen; i+=4 )
 495                     {
 496                         *pOut++ = rendering::ARGBColor(pIn[3],pIn[3]*pIn[0],pIn[3]*pIn[1],pIn[3]*pIn[2]);
 497                         pIn += 4;
 498                     }
 499                     return aRes;
 500                 }
 501                 virtual uno::Sequence< double > SAL_CALL convertFromRGB( const uno::Sequence< rendering::RGBColor >& rgbColor ) throw (lang::IllegalArgumentException, uno::RuntimeException, std::exception) override
 502                 {
 503                     const rendering::RGBColor* pIn( rgbColor.getConstArray() );
 504                     const std::size_t             nLen( rgbColor.getLength() );
 505
 506                     uno::Sequence< double > aRes(nLen*4);
 507                     double* pColors=aRes.getArray();
 508                     for( std::size_t i=0; i<nLen; ++i )
 509                     {
 510                         *pColors++ = pIn->Red;
 511                         *pColors++ = pIn->Green;
 512                         *pColors++ = pIn->Blue;
 513                         *pColors++ = 1.0;
 514                         ++pIn;
 515                     }
 516                     return aRes;
 517                 }
 518                 virtual uno::Sequence< double > SAL_CALL convertFromARGB( const uno::Sequence< rendering::ARGBColor >& rgbColor ) throw (lang::IllegalArgumentException, uno::RuntimeException, std::exception) override
 519                 {
 520                     const rendering::ARGBColor* pIn( rgbColor.getConstArray() );
 521                     const std::size_t              nLen( rgbColor.getLength() );
 522
 523                     uno::Sequence< double > aRes(nLen*4);
 524                     double* pColors=aRes.getArray();
 525                     for( std::size_t i=0; i<nLen; ++i )
 526                     {
 527                         *pColors++ = pIn->Red;
 528                         *pColors++ = pIn->Green;
 529                         *pColors++ = pIn->Blue;
 530                         *pColors++ = pIn->Alpha;
 531                         ++pIn;
 532                     }
 533                     return aRes;
 534                 }
 535                 virtual uno::Sequence< double > SAL_CALL convertFromPARGB( const uno::Sequence< rendering::ARGBColor >& rgbColor ) throw (lang::IllegalArgumentException, uno::RuntimeException, std::exception) override
 536                 {
 537                     const rendering::ARGBColor* pIn( rgbColor.getConstArray() );
 538                     const std::size_t              nLen( rgbColor.getLength() );
 539
 540                     uno::Sequence< double > aRes(nLen*4);
 541                     double* pColors=aRes.getArray();
 542                     for( std::size_t i=0; i<nLen; ++i )
 543                     {
 544                         *pColors++ = pIn->Red/pIn->Alpha;
 545                         *pColors++ = pIn->Green/pIn->Alpha;
 546                         *pColors++ = pIn->Blue/pIn->Alpha;
 547                         *pColors++ = pIn->Alpha;
 548                         ++pIn;
 549                     }
 550                     return aRes;
 551                 }
 552
 553             public:
 554                 StandardColorSpace() : m_aComponentTags(4)
 555                 {
 556                     sal_Int8* pTags = m_aComponentTags.getArray();
 557                     pTags[0] = rendering::ColorComponentTag::RGB_RED;
 558                     pTags[1] = rendering::ColorComponentTag::RGB_GREEN;
 559                     pTags[2] = rendering::ColorComponentTag::RGB_BLUE;
 560                     pTags[3] = rendering::ColorComponentTag::ALPHA;
 561                 }
 562             };
 563         }
 564
 565         uno::Reference<rendering::XColorSpace> createStandardColorSpace()
 566         {
 567             return new StandardColorSpace();
 568         }
 569
 570         uno::Sequence< double > colorToStdColorSpaceSequence( const Color& rColor )
 571         {
 572             uno::Sequence< double > aRet(4);
 573             double* pRet = aRet.getArray();
 574
 575             pRet[0] = toDoubleColor(rColor.GetRed());
 576             pRet[1] = toDoubleColor(rColor.GetGreen());
 577             pRet[2] = toDoubleColor(rColor.GetBlue());
 578
 579             // VCL's notion of alpha is different from the rest of the world's
 580             pRet[3] = 1.0 - toDoubleColor(rColor.GetTransparency());
 581
 582             return aRet;
 583         }
 584
 585         Color stdColorSpaceSequenceToColor( const uno::Sequence< double >& rColor        )
 586         {
 587             ENSURE_ARG_OR_THROW( rColor.getLength() == 4,
 588                                  "color must have 4 channels" );
 589
 590             Color aColor;
 591
 592             aColor.SetRed  ( toByteColor(rColor[0]) );
 593             aColor.SetGreen( toByteColor(rColor[1]) );
 594             aColor.SetBlue ( toByteColor(rColor[2]) );
 595             // VCL's notion of alpha is different from the rest of the world's
 596             aColor.SetTransparency( 255 - toByteColor(rColor[3]) );
 597
 598             return aColor;
 599         }
 600
 601         uno::Sequence< double > colorToDoubleSequence(
 602             const Color&                                    rColor,
 603             const uno::Reference< rendering::XColorSpace >& xColorSpace )
 604         {
 605             uno::Sequence<rendering::ARGBColor> aSeq(1);
 606             aSeq[0] = rendering::ARGBColor(
 607                     1.0-toDoubleColor(rColor.GetTransparency()),
 608                     toDoubleColor(rColor.GetRed()),
 609                     toDoubleColor(rColor.GetGreen()),
 610                     toDoubleColor(rColor.GetBlue()) );
 611
 612             return xColorSpace->convertFromARGB(aSeq);
 613         }
 614
 615         Color doubleSequenceToColor(
 616             const uno::Sequence< double >&                  rColor,
 617             const uno::Reference< rendering::XColorSpace >& xColorSpace )
 618         {
 619             const rendering::ARGBColor aARGBColor(
 620                 xColorSpace->convertToARGB(rColor)[0]);
 621
 622             return Color( 255-toByteColor(aARGBColor.Alpha),
 623                           toByteColor(aARGBColor.Red),
 624                           toByteColor(aARGBColor.Green),
 625                           toByteColor(aARGBColor.Blue) );
 626         }
 627
 628     } // namespace vcltools
 629
 630 } // namespace canvas
 631
 632 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */