src/common/image.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        image.cpp
   3 // Purpose:     wxImage
   4 // Author:      Robert Roebling
   5 // RCS-ID:      $Id$
   6 // Copyright:   (c) Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #ifdef __GNUG__
  11 #pragma implementation "image.h"
  12 #endif
  13
  14 // For compilers that support precompilation, includes "wx.h".
  15 #include "wx/wxprec.h"
  16
  17 #ifdef __BORLANDC__
  18     #pragma hdrstop
  19 #endif
  20
  21 #include "wx/defs.h"
  22
  23 #if wxUSE_IMAGE
  24
  25 #include "wx/image.h"
  26 #include "wx/bitmap.h"
  27 #include "wx/debug.h"
  28 #include "wx/log.h"
  29 #include "wx/app.h"
  30 #include "wx/filefn.h"
  31 #include "wx/filesys.h"
  32 #include "wx/wfstream.h"
  33 #include "wx/intl.h"
  34 #include "wx/module.h"
  35
  36 // For memcpy
  37 #include <string.h>
  38 #include <math.h>
  39
  40 #ifdef __SALFORDC__
  41     #undef FAR
  42 #endif
  43
  44
  45 //-----------------------------------------------------------------------------
  46 // wxImage
  47 //-----------------------------------------------------------------------------
  48
  49 class wxImageRefData: public wxObjectRefData
  50 {
  51 public:
  52     wxImageRefData();
  53     ~wxImageRefData();
  54
  55     int             m_width;
  56     int             m_height;
  57     unsigned char  *m_data;
  58     bool            m_hasMask;
  59     unsigned char   m_maskRed,m_maskGreen,m_maskBlue;
  60     bool            m_ok;
  61     bool            m_static;
  62     wxPalette       m_palette;
  63     wxArrayString   m_optionNames;
  64     wxArrayString   m_optionValues;
  65 };
  66
  67 wxImageRefData::wxImageRefData()
  68 {
  69     m_width = 0;
  70     m_height = 0;
  71     m_data = (unsigned char*) NULL;
  72     m_ok = FALSE;
  73     m_maskRed = 0;
  74     m_maskGreen = 0;
  75     m_maskBlue = 0;
  76     m_hasMask = FALSE;
  77     m_static = FALSE;
  78 }
  79
  80 wxImageRefData::~wxImageRefData()
  81 {
  82     if (m_data && !m_static)
  83         free( m_data );
  84 }
  85
  86 wxList wxImage::sm_handlers;
  87
  88 wxImage wxNullImage;
  89
  90 //-----------------------------------------------------------------------------
  91
  92 #define M_IMGDATA ((wxImageRefData *)m_refData)
  93
  94 IMPLEMENT_DYNAMIC_CLASS(wxImage, wxObject)
  95
  96 wxImage::wxImage()
  97 {
  98 }
  99
 100 wxImage::wxImage( int width, int height )
 101 {
 102     Create( width, height );
 103 }
 104
 105 wxImage::wxImage( int width, int height, unsigned char* data, bool static_data )
 106 {
 107     Create( width, height, data, static_data );
 108 }
 109
 110 wxImage::wxImage( const wxString& name, long type )
 111 {
 112     LoadFile( name, type );
 113 }
 114
 115 wxImage::wxImage( const wxString& name, const wxString& mimetype )
 116 {
 117     LoadFile( name, mimetype );
 118 }
 119
 120 #if wxUSE_STREAMS
 121 wxImage::wxImage( wxInputStream& stream, long type )
 122 {
 123     LoadFile( stream, type );
 124 }
 125
 126 wxImage::wxImage( wxInputStream& stream, const wxString& mimetype )
 127 {
 128     LoadFile( stream, mimetype );
 129 }
 130 #endif // wxUSE_STREAMS
 131
 132 wxImage::wxImage( const wxImage& image )
 133 {
 134     Ref(image);
 135 }
 136
 137 wxImage::wxImage( const wxImage* image )
 138 {
 139     if (image) Ref(*image);
 140 }
 141
 142 void wxImage::Create( int width, int height )
 143 {
 144     UnRef();
 145
 146     m_refData = new wxImageRefData();
 147
 148     M_IMGDATA->m_data = (unsigned char *) malloc( width*height*3 );
 149     if (M_IMGDATA->m_data)
 150     {
 151         for (int l = 0; l < width*height*3; l++) M_IMGDATA->m_data[l] = 0;
 152
 153         M_IMGDATA->m_width = width;
 154         M_IMGDATA->m_height = height;
 155         M_IMGDATA->m_ok = TRUE;
 156     }
 157     else
 158     {
 159         UnRef();
 160     }
 161 }
 162
 163 void wxImage::Create( int width, int height, unsigned char* data, bool static_data )
 164 {
 165     UnRef();
 166
 167     m_refData = new wxImageRefData();
 168
 169     M_IMGDATA->m_data = data;
 170     if (M_IMGDATA->m_data)
 171     {
 172         M_IMGDATA->m_width = width;
 173         M_IMGDATA->m_height = height;
 174         M_IMGDATA->m_ok = TRUE;
 175         M_IMGDATA->m_static = static_data;
 176     }
 177     else
 178     {
 179         UnRef();
 180     }
 181 }
 182
 183 void wxImage::Destroy()
 184 {
 185     UnRef();
 186 }
 187
 188 wxImage wxImage::Copy() const
 189 {
 190     wxImage image;
 191
 192     wxCHECK_MSG( Ok(), image, wxT("invalid image") );
 193
 194     image.Create( M_IMGDATA->m_width, M_IMGDATA->m_height );
 195
 196     char unsigned *data = image.GetData();
 197
 198     wxCHECK_MSG( data, image, wxT("unable to create image") );
 199
 200     if (M_IMGDATA->m_hasMask)
 201         image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue );
 202
 203     memcpy( data, GetData(), M_IMGDATA->m_width*M_IMGDATA->m_height*3 );
 204
 205     return image;
 206 }
 207
 208 wxImage wxImage::Scale( int width, int height ) const
 209 {
 210     wxImage image;
 211
 212     wxCHECK_MSG( Ok(), image, wxT("invalid image") );
 213
 214     wxCHECK_MSG( (width > 0) && (height > 0), image, wxT("invalid image size") );
 215
 216     image.Create( width, height );
 217
 218     char unsigned *data = image.GetData();
 219
 220     wxCHECK_MSG( data, image, wxT("unable to create image") );
 221
 222     if (M_IMGDATA->m_hasMask)
 223         image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue );
 224
 225     long old_height = M_IMGDATA->m_height;
 226     long old_width  = M_IMGDATA->m_width;
 227
 228     char unsigned *source_data = M_IMGDATA->m_data;
 229     char unsigned *target_data = data;
 230
 231     for (long j = 0; j < height; j++)
 232     {
 233         long y_offset = (j * (old_height-1) / (height-1)) * old_width;
 234
 235         for (long i = 0; i < width; i++)
 236         {
 237             memcpy( target_data,
 238                 source_data + 3*(y_offset + ((i * (old_width-1) )/ (width-1))),
 239                 3 );
 240             target_data += 3;
 241         }
 242     }
 243
 244     return image;
 245 }
 246
 247 wxImage wxImage::Rotate90( bool clockwise ) const
 248 {
 249     wxImage image;
 250
 251     wxCHECK_MSG( Ok(), image, wxT("invalid image") );
 252
 253     image.Create( M_IMGDATA->m_height, M_IMGDATA->m_width );
 254
 255     char unsigned *data = image.GetData();
 256
 257     wxCHECK_MSG( data, image, wxT("unable to create image") );
 258
 259     if (M_IMGDATA->m_hasMask)
 260         image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue );
 261
 262     long height = M_IMGDATA->m_height;
 263     long width  = M_IMGDATA->m_width;
 264
 265     char unsigned *source_data = M_IMGDATA->m_data;
 266     char unsigned *target_data;
 267
 268     for (long j = 0; j < height; j++)
 269     {
 270         for (long i = 0; i < width; i++)
 271         {
 272             if (clockwise)
 273                 target_data = data + (((i+1)*height) - j - 1)*3;
 274             else
 275                 target_data = data + ((height*(width-1)) + j - (i*height))*3;
 276             memcpy( target_data, source_data, 3 );
 277             source_data += 3;
 278         }
 279     }
 280
 281     return image;
 282 }
 283
 284 wxImage wxImage::Mirror( bool horizontally ) const
 285 {
 286     wxImage image;
 287
 288     wxCHECK_MSG( Ok(), image, wxT("invalid image") );
 289
 290     image.Create( M_IMGDATA->m_width, M_IMGDATA->m_height );
 291
 292     char unsigned *data = image.GetData();
 293
 294     wxCHECK_MSG( data, image, wxT("unable to create image") );
 295
 296     if (M_IMGDATA->m_hasMask)
 297         image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue );
 298
 299     long height = M_IMGDATA->m_height;
 300     long width  = M_IMGDATA->m_width;
 301
 302     char unsigned *source_data = M_IMGDATA->m_data;
 303     char unsigned *target_data;
 304
 305     if (horizontally)
 306     {
 307         for (long j = 0; j < height; j++)
 308         {
 309             data += width*3;
 310             target_data = data-3;
 311             for (long i = 0; i < width; i++)
 312             {
 313                 memcpy( target_data, source_data, 3 );
 314                 source_data += 3;
 315                 target_data -= 3;
 316             }
 317         }
 318     }
 319     else
 320     {
 321         for (long i = 0; i < height; i++)
 322         {
 323             target_data = data + 3*width*(height-1-i);
 324             memcpy( target_data, source_data, (size_t)3*width );
 325             source_data += 3*width;
 326         }
 327     }
 328
 329     return image;
 330 }
 331
 332 wxImage wxImage::GetSubImage( const wxRect &rect ) const
 333 {
 334     wxImage image;
 335
 336     wxCHECK_MSG( Ok(), image, wxT("invalid image") );
 337
 338     wxCHECK_MSG( (rect.GetLeft()>=0) && (rect.GetTop()>=0) && (rect.GetRight()<=GetWidth()) && (rect.GetBottom()<=GetHeight()),
 339                  image, wxT("invalid subimage size") );
 340
 341     int subwidth=rect.GetWidth();
 342     const int subheight=rect.GetHeight();
 343
 344     image.Create( subwidth, subheight );
 345
 346     char unsigned *subdata = image.GetData(), *data=GetData();
 347
 348     wxCHECK_MSG( subdata, image, wxT("unable to create image") );
 349
 350     if (M_IMGDATA->m_hasMask)
 351         image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue );
 352
 353     const int subleft=3*rect.GetLeft();
 354     const int width=3*GetWidth();
 355     subwidth*=3;
 356
 357     data+=rect.GetTop()*width+subleft;
 358
 359     for (long j = 0; j < subheight; ++j)
 360     {
 361         memcpy( subdata, data, subwidth);
 362         subdata+=subwidth;
 363         data+=width;
 364     }
 365
 366     return image;
 367 }
 368
 369 void wxImage::Paste( const wxImage &image, int x, int y )
 370 {
 371     wxCHECK_RET( Ok(), wxT("invalid image") );
 372     wxCHECK_RET( image.Ok(), wxT("invalid image") );
 373
 374     int xx = 0;
 375     int yy = 0;
 376     int width = image.GetWidth();
 377     int height = image.GetHeight();
 378
 379     if (x < 0)
 380     {
 381         xx = -x;
 382         width += x;
 383     }
 384     if (y < 0)
 385     {
 386         yy = -y;
 387         height += y;
 388     }
 389
 390     if ((x+xx)+width > M_IMGDATA->m_width)
 391         width = M_IMGDATA->m_width - (x+xx);
 392     if ((y+yy)+height > M_IMGDATA->m_height)
 393         height = M_IMGDATA->m_height - (y+yy);
 394
 395     if (width < 1) return;
 396     if (height < 1) return;
 397
 398     if ((!HasMask() && !image.HasMask()) ||
 399        ((HasMask() && image.HasMask() &&
 400          (GetMaskRed()==image.GetMaskRed()) &&
 401          (GetMaskGreen()==image.GetMaskGreen()) &&
 402          (GetMaskBlue()==image.GetMaskBlue()))))
 403     {
 404         width *= 3;
 405         unsigned char* source_data = image.GetData() + xx*3 + yy*3*image.GetWidth();
 406         int source_step = image.GetWidth()*3;
 407
 408         unsigned char* target_data = GetData() + (x+xx)*3 + (y+yy)*3*M_IMGDATA->m_width;
 409         int target_step = M_IMGDATA->m_width*3;
 410         for (int j = 0; j < height; j++)
 411         {
 412             memcpy( target_data, source_data, width );
 413             source_data += source_step;
 414             target_data += target_step;
 415         }
 416         return;
 417     }
 418
 419     if (!HasMask() && image.HasMask())
 420     {
 421         unsigned char r = image.GetMaskRed();
 422         unsigned char g = image.GetMaskGreen();
 423         unsigned char b = image.GetMaskBlue();
 424
 425         width *= 3;
 426         unsigned char* source_data = image.GetData() + xx*3 + yy*3*image.GetWidth();
 427         int source_step = image.GetWidth()*3;
 428
 429         unsigned char* target_data = GetData() + (x+xx)*3 + (y+yy)*3*M_IMGDATA->m_width;
 430         int target_step = M_IMGDATA->m_width*3;
 431
 432         for (int j = 0; j < height; j++)
 433         {
 434             for (int i = 0; i < width; i+=3)
 435             {
 436                 if ((source_data[i]   != r) &&
 437                     (source_data[i+1] != g) &&
 438                     (source_data[i+2] != b))
 439                 {
 440                     memcpy( target_data+i, source_data+i, 3 );
 441                 }
 442             }
 443             source_data += source_step;
 444             target_data += target_step;
 445         }
 446     }
 447 }
 448
 449 void wxImage::Replace( unsigned char r1, unsigned char g1, unsigned char b1,
 450                        unsigned char r2, unsigned char g2, unsigned char b2 )
 451 {
 452     wxCHECK_RET( Ok(), wxT("invalid image") );
 453
 454     char unsigned *data = GetData();
 455
 456     const int w = GetWidth();
 457     const int h = GetHeight();
 458
 459     for (int j = 0; j < h; j++)
 460         for (int i = 0; i < w; i++)
 461         {
 462             if ((data[0] == r1) && (data[1] == g1) && (data[2] == b1))
 463             {
 464                 data[0] = r2;
 465                 data[1] = g2;
 466                 data[2] = b2;
 467             }
 468             data += 3;
 469         }
 470 }
 471
 472 wxImage wxImage::ConvertToMono( unsigned char r, unsigned char g, unsigned char b ) const
 473 {
 474     wxImage image;
 475
 476     wxCHECK_MSG( Ok(), image, wxT("invalid image") );
 477
 478     image.Create( M_IMGDATA->m_width, M_IMGDATA->m_height );
 479
 480     char unsigned *data = image.GetData();
 481
 482     wxCHECK_MSG( data, image, wxT("unable to create image") );
 483
 484     if (M_IMGDATA->m_hasMask)
 485     {
 486         if (M_IMGDATA->m_maskRed == r && M_IMGDATA->m_maskGreen == g &&
 487                                          M_IMGDATA->m_maskBlue == b)
 488             image.SetMaskColour( 255, 255, 255 );
 489         else
 490             image.SetMaskColour( 0, 0, 0 );
 491     }
 492
 493     long size = M_IMGDATA->m_height * M_IMGDATA->m_width;
 494
 495     char unsigned *srcd = M_IMGDATA->m_data;
 496     char unsigned *tard = image.GetData();
 497
 498     for ( long i = 0; i < size; i++, srcd += 3, tard += 3 )
 499     {
 500         if (srcd[0] == r && srcd[1] == g && srcd[2] == b)
 501             tard[0] = tard[1] = tard[2] = 255;
 502         else
 503             tard[0] = tard[1] = tard[2] = 0;
 504     }
 505
 506     return image;
 507 }
 508
 509 void wxImage::SetRGB( int x, int y, unsigned char r, unsigned char g, unsigned char b )
 510 {
 511     wxCHECK_RET( Ok(), wxT("invalid image") );
 512
 513     int w = M_IMGDATA->m_width;
 514     int h = M_IMGDATA->m_height;
 515
 516     wxCHECK_RET( (x>=0) && (y>=0) && (x<w) && (y<h), wxT("invalid image index") );
 517
 518     long pos = (y * w + x) * 3;
 519
 520     M_IMGDATA->m_data[ pos   ] = r;
 521     M_IMGDATA->m_data[ pos+1 ] = g;
 522     M_IMGDATA->m_data[ pos+2 ] = b;
 523 }
 524
 525 unsigned char wxImage::GetRed( int x, int y ) const
 526 {
 527     wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
 528
 529     int w = M_IMGDATA->m_width;
 530     int h = M_IMGDATA->m_height;
 531
 532     wxCHECK_MSG( (x>=0) && (y>=0) && (x<w) && (y<h), 0, wxT("invalid image index") );
 533
 534     long pos = (y * w + x) * 3;
 535
 536     return M_IMGDATA->m_data[pos];
 537 }
 538
 539 unsigned char wxImage::GetGreen( int x, int y ) const
 540 {
 541     wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
 542
 543     int w = M_IMGDATA->m_width;
 544     int h = M_IMGDATA->m_height;
 545
 546     wxCHECK_MSG( (x>=0) && (y>=0) && (x<w) && (y<h), 0, wxT("invalid image index") );
 547
 548     long pos = (y * w + x) * 3;
 549
 550     return M_IMGDATA->m_data[pos+1];
 551 }
 552
 553 unsigned char wxImage::GetBlue( int x, int y ) const
 554 {
 555     wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
 556
 557     int w = M_IMGDATA->m_width;
 558     int h = M_IMGDATA->m_height;
 559
 560     wxCHECK_MSG( (x>=0) && (y>=0) && (x<w) && (y<h), 0, wxT("invalid image index") );
 561
 562     long pos = (y * w + x) * 3;
 563
 564     return M_IMGDATA->m_data[pos+2];
 565 }
 566
 567 bool wxImage::Ok() const
 568 {
 569     // image of 0 width or height can't be considered ok - at least because it
 570     // causes crashes in ConvertToBitmap() if we don't catch it in time
 571     wxImageRefData *data = M_IMGDATA;
 572     return data && data->m_ok && data->m_width && data->m_height;
 573 }
 574
 575 char unsigned *wxImage::GetData() const
 576 {
 577     wxCHECK_MSG( Ok(), (char unsigned *)NULL, wxT("invalid image") );
 578
 579     return M_IMGDATA->m_data;
 580 }
 581
 582 void wxImage::SetData( char unsigned *data )
 583 {
 584     wxCHECK_RET( Ok(), wxT("invalid image") );
 585
 586     wxImageRefData *newRefData = new wxImageRefData();
 587
 588     newRefData->m_width = M_IMGDATA->m_width;
 589     newRefData->m_height = M_IMGDATA->m_height;
 590     newRefData->m_data = data;
 591     newRefData->m_ok = TRUE;
 592     newRefData->m_maskRed = M_IMGDATA->m_maskRed;
 593     newRefData->m_maskGreen = M_IMGDATA->m_maskGreen;
 594     newRefData->m_maskBlue = M_IMGDATA->m_maskBlue;
 595     newRefData->m_hasMask = M_IMGDATA->m_hasMask;
 596
 597     UnRef();
 598
 599     m_refData = newRefData;
 600 }
 601
 602 void wxImage::SetData( char unsigned *data, int new_width, int new_height )
 603 {
 604     wxImageRefData *newRefData = new wxImageRefData();
 605
 606     if (m_refData)
 607     {
 608         newRefData->m_width = new_width;
 609         newRefData->m_height = new_height;
 610         newRefData->m_data = data;
 611         newRefData->m_ok = TRUE;
 612         newRefData->m_maskRed = M_IMGDATA->m_maskRed;
 613         newRefData->m_maskGreen = M_IMGDATA->m_maskGreen;
 614         newRefData->m_maskBlue = M_IMGDATA->m_maskBlue;
 615         newRefData->m_hasMask = M_IMGDATA->m_hasMask;
 616     }
 617     else
 618     {
 619         newRefData->m_width = new_width;
 620         newRefData->m_height = new_height;
 621         newRefData->m_data = data;
 622         newRefData->m_ok = TRUE;
 623     }
 624
 625     UnRef();
 626
 627     m_refData = newRefData;
 628 }
 629
 630 void wxImage::SetMaskColour( unsigned char r, unsigned char g, unsigned char b )
 631 {
 632     wxCHECK_RET( Ok(), wxT("invalid image") );
 633
 634     M_IMGDATA->m_maskRed = r;
 635     M_IMGDATA->m_maskGreen = g;
 636     M_IMGDATA->m_maskBlue = b;
 637     M_IMGDATA->m_hasMask = TRUE;
 638 }
 639
 640 unsigned char wxImage::GetMaskRed() const
 641 {
 642     wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
 643
 644     return M_IMGDATA->m_maskRed;
 645 }
 646
 647 unsigned char wxImage::GetMaskGreen() const
 648 {
 649     wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
 650
 651     return M_IMGDATA->m_maskGreen;
 652 }
 653
 654 unsigned char wxImage::GetMaskBlue() const
 655 {
 656     wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
 657
 658     return M_IMGDATA->m_maskBlue;
 659 }
 660
 661 void wxImage::SetMask( bool mask )
 662 {
 663     wxCHECK_RET( Ok(), wxT("invalid image") );
 664
 665     M_IMGDATA->m_hasMask = mask;
 666 }
 667
 668 bool wxImage::HasMask() const
 669 {
 670     wxCHECK_MSG( Ok(), FALSE, wxT("invalid image") );
 671
 672     return M_IMGDATA->m_hasMask;
 673 }
 674
 675 int wxImage::GetWidth() const
 676 {
 677     wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
 678
 679     return M_IMGDATA->m_width;
 680 }
 681
 682 int wxImage::GetHeight() const
 683 {
 684     wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
 685
 686     return M_IMGDATA->m_height;
 687 }
 688
 689 // Palette functions
 690
 691 bool wxImage::HasPalette() const
 692 {
 693     if (!Ok())
 694         return FALSE;
 695
 696     return M_IMGDATA->m_palette.Ok();
 697 }
 698
 699 const wxPalette& wxImage::GetPalette() const
 700 {
 701     wxCHECK_MSG( Ok(), wxNullPalette, wxT("invalid image") );
 702
 703     return M_IMGDATA->m_palette;
 704 }
 705
 706 void wxImage::SetPalette(const wxPalette& palette)
 707 {
 708     wxCHECK_RET( Ok(), wxT("invalid image") );
 709
 710     M_IMGDATA->m_palette = palette;
 711 }
 712
 713 // Option functions (arbitrary name/value mapping)
 714 void wxImage::SetOption(const wxString& name, const wxString& value)
 715 {
 716     wxCHECK_RET( Ok(), wxT("invalid image") );
 717
 718     int idx = M_IMGDATA->m_optionNames.Index(name, FALSE);
 719     if (idx == wxNOT_FOUND)
 720     {
 721         M_IMGDATA->m_optionNames.Add(name);
 722         M_IMGDATA->m_optionValues.Add(value);
 723     }
 724     else
 725     {
 726         M_IMGDATA->m_optionNames[idx] = name;
 727         M_IMGDATA->m_optionValues[idx] = value;
 728     }
 729 }
 730
 731 void wxImage::SetOption(const wxString& name, int value)
 732 {
 733     wxString valStr;
 734     valStr.Printf(wxT("%d"), value);
 735     SetOption(name, valStr);
 736 }
 737
 738 wxString wxImage::GetOption(const wxString& name) const
 739 {
 740     wxCHECK_MSG( Ok(), wxEmptyString, wxT("invalid image") );
 741
 742     int idx = M_IMGDATA->m_optionNames.Index(name, FALSE);
 743     if (idx == wxNOT_FOUND)
 744         return wxEmptyString;
 745     else
 746         return M_IMGDATA->m_optionValues[idx];
 747 }
 748
 749 int wxImage::GetOptionInt(const wxString& name) const
 750 {
 751     wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
 752
 753     return wxAtoi(GetOption(name));
 754 }
 755
 756 bool wxImage::HasOption(const wxString& name) const
 757 {
 758     wxCHECK_MSG( Ok(), FALSE, wxT("invalid image") );
 759
 760     return (M_IMGDATA->m_optionNames.Index(name, FALSE) != wxNOT_FOUND);
 761 }
 762
 763 bool wxImage::LoadFile( const wxString& filename, long type )
 764 {
 765 #if wxUSE_STREAMS
 766     // We want to use wxFileSystem for virtual FS compatibility
 767     wxFileSystem fsys;
 768     wxFSFile *file = fsys.OpenFile(filename);
 769     if (!file) {
 770         wxLogError(_("Can't open file '%s'"), filename);
 771         return FALSE;
 772         }
 773     wxInputStream *stream = file->GetStream();
 774     if (!stream) {
 775         wxLogError(_("Can't open stream for file '%s'"), filename);
 776         return FALSE;
 777         }
 778     return LoadFile(*stream, type);
 779 #else // !wxUSE_STREAMS
 780     return FALSE;
 781 #endif // wxUSE_STREAMS
 782 }
 783
 784 bool wxImage::LoadFile( const wxString& filename, const wxString& mimetype )
 785 {
 786 #if wxUSE_STREAMS
 787     // We want to use wxFileSystem for virtual FS compatibility
 788     wxFileSystem fsys;
 789     wxFSFile *file = fsys.OpenFile(filename);
 790     if (!file) {
 791         wxLogError(_("Can't open file '%s'"), filename);
 792         return FALSE;
 793         }
 794     wxInputStream *stream = file->GetStream();
 795     if (!stream) {
 796         wxLogError(_("Can't open stream for file '%s'"), filename);
 797         return FALSE;
 798         }
 799     return LoadFile(*stream, mimetype);
 800 #else // !wxUSE_STREAMS
 801     return FALSE;
 802 #endif // wxUSE_STREAMS
 803 }
 804
 805 bool wxImage::SaveFile( const wxString& filename, int type )
 806 {
 807 #if wxUSE_STREAMS
 808     wxFileOutputStream stream(filename);
 809
 810     if ( stream.LastError() == wxStream_NOERROR )
 811     {
 812         wxBufferedOutputStream bstream( stream );
 813         return SaveFile(bstream, type);
 814     }
 815 #endif // wxUSE_STREAMS
 816
 817     return FALSE;
 818 }
 819
 820 bool wxImage::SaveFile( const wxString& filename, const wxString& mimetype )
 821 {
 822 #if wxUSE_STREAMS
 823     wxFileOutputStream stream(filename);
 824
 825     if ( stream.LastError() == wxStream_NOERROR )
 826     {
 827         wxBufferedOutputStream bstream( stream );
 828         return SaveFile(bstream, mimetype);
 829     }
 830 #endif // wxUSE_STREAMS
 831
 832     return FALSE;
 833 }
 834
 835 bool wxImage::CanRead( const wxString &name )
 836 {
 837 #if wxUSE_STREAMS
 838   wxFileInputStream stream(name);
 839   return CanRead(stream);
 840 #else
 841   return FALSE;
 842 #endif
 843 }
 844
 845 #if wxUSE_STREAMS
 846
 847 bool wxImage::CanRead( wxInputStream &stream )
 848 {
 849   wxList &list=GetHandlers();
 850
 851   for ( wxList::Node *node = list.GetFirst(); node; node = node->GetNext() )
 852     {
 853       wxImageHandler *handler=(wxImageHandler*)node->GetData();
 854       if (handler->CanRead( stream ))
 855         return TRUE;
 856     }
 857
 858   return FALSE;
 859 }
 860
 861 bool wxImage::LoadFile( wxInputStream& stream, long type )
 862 {
 863     UnRef();
 864
 865     m_refData = new wxImageRefData;
 866
 867     wxImageHandler *handler;
 868
 869     if (type==wxBITMAP_TYPE_ANY)
 870     {
 871         wxList &list=GetHandlers();
 872
 873         for ( wxList::Node *node = list.GetFirst(); node; node = node->GetNext() )
 874         {
 875              handler=(wxImageHandler*)node->GetData();
 876              if (handler->CanRead( stream ))
 877                  return handler->LoadFile( this, stream );
 878
 879         }
 880
 881         wxLogWarning( _("No handler found for image type.") );
 882         return FALSE;
 883     }
 884
 885     handler = FindHandler(type);
 886
 887     if (handler == NULL)
 888     {
 889         wxLogWarning( _("No image handler for type %d defined."), type );
 890
 891         return FALSE;
 892     }
 893
 894     return handler->LoadFile( this, stream );
 895 }
 896
 897 bool wxImage::LoadFile( wxInputStream& stream, const wxString& mimetype )
 898 {
 899     UnRef();
 900
 901     m_refData = new wxImageRefData;
 902
 903     wxImageHandler *handler = FindHandlerMime(mimetype);
 904
 905     if (handler == NULL)
 906     {
 907         wxLogWarning( _("No image handler for type %s defined."), mimetype.GetData() );
 908
 909         return FALSE;
 910     }
 911
 912     return handler->LoadFile( this, stream );
 913 }
 914
 915 bool wxImage::SaveFile( wxOutputStream& stream, int type )
 916 {
 917     wxCHECK_MSG( Ok(), FALSE, wxT("invalid image") );
 918
 919     wxImageHandler *handler = FindHandler(type);
 920
 921     if (handler == NULL)
 922     {
 923         wxLogWarning( _("No image handler for type %d defined."), type );
 924
 925         return FALSE;
 926     }
 927
 928     return handler->SaveFile( this, stream );
 929 }
 930
 931 bool wxImage::SaveFile( wxOutputStream& stream, const wxString& mimetype )
 932 {
 933     wxCHECK_MSG( Ok(), FALSE, wxT("invalid image") );
 934
 935     wxImageHandler *handler = FindHandlerMime(mimetype);
 936
 937     if (handler == NULL)
 938     {
 939         wxLogWarning( _("No image handler for type %s defined."), mimetype.GetData() );
 940
 941         return FALSE;
 942     }
 943
 944     return handler->SaveFile( this, stream );
 945 }
 946 #endif // wxUSE_STREAMS
 947
 948 void wxImage::AddHandler( wxImageHandler *handler )
 949 {
 950     // make sure that the memory will be freed at the program end
 951     sm_handlers.DeleteContents(TRUE);
 952
 953     sm_handlers.Append( handler );
 954 }
 955
 956 void wxImage::InsertHandler( wxImageHandler *handler )
 957 {
 958     // make sure that the memory will be freed at the program end
 959     sm_handlers.DeleteContents(TRUE);
 960
 961     sm_handlers.Insert( handler );
 962 }
 963
 964 bool wxImage::RemoveHandler( const wxString& name )
 965 {
 966     wxImageHandler *handler = FindHandler(name);
 967     if (handler)
 968     {
 969         sm_handlers.DeleteObject(handler);
 970         return TRUE;
 971     }
 972     else
 973         return FALSE;
 974 }
 975
 976 wxImageHandler *wxImage::FindHandler( const wxString& name )
 977 {
 978     wxNode *node = sm_handlers.First();
 979     while (node)
 980     {
 981         wxImageHandler *handler = (wxImageHandler*)node->Data();
 982         if (handler->GetName().Cmp(name) == 0) return handler;
 983
 984         node = node->Next();
 985     }
 986     return (wxImageHandler *)NULL;
 987 }
 988
 989 wxImageHandler *wxImage::FindHandler( const wxString& extension, long bitmapType )
 990 {
 991     wxNode *node = sm_handlers.First();
 992     while (node)
 993     {
 994         wxImageHandler *handler = (wxImageHandler*)node->Data();
 995         if ( (handler->GetExtension().Cmp(extension) == 0) &&
 996             (bitmapType == -1 || handler->GetType() == bitmapType) )
 997             return handler;
 998         node = node->Next();
 999     }
1000     return (wxImageHandler*)NULL;
1001 }
1002
1003 wxImageHandler *wxImage::FindHandler( long bitmapType )
1004 {
1005     wxNode *node = sm_handlers.First();
1006     while (node)
1007     {
1008         wxImageHandler *handler = (wxImageHandler *)node->Data();
1009         if (handler->GetType() == bitmapType) return handler;
1010         node = node->Next();
1011     }
1012     return NULL;
1013 }
1014
1015 wxImageHandler *wxImage::FindHandlerMime( const wxString& mimetype )
1016 {
1017     wxNode *node = sm_handlers.First();
1018     while (node)
1019     {
1020         wxImageHandler *handler = (wxImageHandler *)node->Data();
1021         if (handler->GetMimeType().IsSameAs(mimetype, FALSE)) return handler;
1022         node = node->Next();
1023     }
1024     return NULL;
1025 }
1026
1027 void wxImage::InitStandardHandlers()
1028 {
1029     AddHandler(new wxBMPHandler);
1030 #if !defined(__WXGTK__) && !defined(__WXMOTIF__)
1031     AddHandler(new wxXPMHandler);
1032 #endif
1033 }
1034
1035 void wxImage::CleanUpHandlers()
1036 {
1037     wxNode *node = sm_handlers.First();
1038     while (node)
1039     {
1040         wxImageHandler *handler = (wxImageHandler *)node->Data();
1041         wxNode *next = node->Next();
1042         delete handler;
1043         delete node;
1044         node = next;
1045     }
1046 }
1047
1048 //-----------------------------------------------------------------------------
1049 // wxImageHandler
1050 //-----------------------------------------------------------------------------
1051
1052 IMPLEMENT_ABSTRACT_CLASS(wxImageHandler,wxObject)
1053
1054 #if wxUSE_STREAMS
1055 bool wxImageHandler::LoadFile( wxImage *WXUNUSED(image), wxInputStream& WXUNUSED(stream), bool WXUNUSED(verbose), int WXUNUSED(index) )
1056 {
1057     return FALSE;
1058 }
1059
1060 bool wxImageHandler::SaveFile( wxImage *WXUNUSED(image), wxOutputStream& WXUNUSED(stream), bool WXUNUSED(verbose) )
1061 {
1062     return FALSE;
1063 }
1064
1065 int wxImageHandler::GetImageCount( wxInputStream& WXUNUSED(stream) )
1066 {
1067     return 1;
1068 }
1069
1070 bool wxImageHandler::CanRead( const wxString& name )
1071 {
1072     if (wxFileExists(name))
1073     {
1074         wxFileInputStream stream(name);
1075         return CanRead(stream);
1076     }
1077
1078     else {
1079         wxLogError( _("Can't check image format of file '%s': file does not exist."), name.c_str() );
1080
1081         return FALSE;
1082     }
1083 //    return FALSE;
1084 }
1085
1086 #endif // wxUSE_STREAMS
1087
1088
1089
1090 //-----------------------------------------------------------------------------
1091 // wxBitmap convertion routines
1092 //-----------------------------------------------------------------------------
1093
1094 #if wxUSE_GUI
1095
1096 #ifdef __WXGTK__
1097 wxBitmap wxImage::ConvertToMonoBitmap( unsigned char red, unsigned char green, unsigned char blue ) const
1098 {
1099     wxImage mono = this->ConvertToMono( red, green, blue );
1100     wxBitmap bitmap( mono, 1 );
1101     return bitmap;
1102 }
1103 #endif
1104
1105 wxBitmap wxImage::ConvertToBitmap() const
1106 {
1107     wxBitmap bitmap( *this );
1108     return bitmap;
1109 }
1110
1111 wxImage::wxImage( const wxBitmap &bitmap )
1112 {
1113     *this = bitmap.ConvertToImage();
1114 }
1115
1116 #endif
1117
1118
1119
1120 // A module to allow wxImage initialization/cleanup
1121 // without calling these functions from app.cpp or from
1122 // the user's application.
1123
1124 class wxImageModule: public wxModule
1125 {
1126 DECLARE_DYNAMIC_CLASS(wxImageModule)
1127 public:
1128     wxImageModule() {}
1129     bool OnInit() { wxImage::InitStandardHandlers(); return TRUE; };
1130     void OnExit() { wxImage::CleanUpHandlers(); };
1131 };
1132
1133 IMPLEMENT_DYNAMIC_CLASS(wxImageModule, wxModule)
1134
1135
1136 //-----------------------------------------------------------------------------
1137
1138 // GRG, Dic/99
1139 // Counts and returns the number of different colours. Optionally stops
1140 // when it exceeds 'stopafter' different colours. This is useful, for
1141 // example, to see if the image can be saved as 8-bit (256 colour or
1142 // less, in this case it would be invoked as CountColours(256)). Default
1143 // value for stopafter is -1 (don't care).
1144 //
1145 unsigned long wxImage::CountColours( unsigned long stopafter )
1146 {
1147     wxHashTable h;
1148     wxObject dummy;
1149     unsigned char r, g, b;
1150     unsigned char *p;
1151     unsigned long size, nentries, key;
1152
1153     p = GetData();
1154     size = GetWidth() * GetHeight();
1155     nentries = 0;
1156
1157     for (unsigned long j = 0; (j < size) && (nentries <= stopafter) ; j++)
1158     {
1159         r = *(p++);
1160         g = *(p++);
1161         b = *(p++);
1162         key = (r << 16) | (g << 8) | b;
1163
1164         if (h.Get(key) == NULL)
1165         {
1166             h.Put(key, &dummy);
1167             nentries++;
1168         }
1169     }
1170
1171     return nentries;
1172 }
1173
1174
1175 // GRG, Dic/99
1176 // Computes the histogram of the image and fills a hash table, indexed
1177 // with integer keys built as 0xRRGGBB, containing wxHNode objects. Each
1178 // wxHNode contains an 'index' (useful to build a palette with the image
1179 // colours) and a 'value', which is the number of pixels in the image with
1180 // that colour.
1181 //
1182 unsigned long wxImage::ComputeHistogram( wxHashTable &h )
1183 {
1184     unsigned char r, g, b;
1185     unsigned char *p;
1186     unsigned long size, nentries, key;
1187     wxHNode *hnode;
1188
1189     p = GetData();
1190     size = GetWidth() * GetHeight();
1191     nentries = 0;
1192
1193     for (unsigned long j = 0; j < size; j++)
1194     {
1195         r = *(p++);
1196         g = *(p++);
1197         b = *(p++);
1198         key = (r << 16) | (g << 8) | b;
1199
1200         hnode = (wxHNode *) h.Get(key);
1201
1202         if (hnode)
1203             hnode->value++;
1204         else
1205         {
1206             hnode = new wxHNode();
1207             hnode->index = nentries++;
1208             hnode->value = 1;
1209
1210             h.Put(key, (wxObject *)hnode);
1211         }
1212     }
1213
1214     return nentries;
1215 }
1216
1217 /*
1218  * Rotation code by Carlos Moreno
1219  */
1220
1221 // GRG: I've removed wxRotationPoint - we already have wxRealPoint which
1222 //      does exactly the same thing. And I also got rid of wxRotationPixel
1223 //      bacause of potential problems in architectures where alignment
1224 //      is an issue, so I had to rewrite parts of the code.
1225
1226 static const double gs_Epsilon = 1e-10;
1227
1228 static inline int wxCint (double x)
1229 {
1230     return (x > 0) ? (int) (x + 0.5) : (int) (x - 0.5);
1231 }
1232
1233
1234 // Auxiliary function to rotate a point (x,y) with respect to point p0
1235 // make it inline and use a straight return to facilitate optimization
1236 // also, the function receives the sine and cosine of the angle to avoid
1237 // repeating the time-consuming calls to these functions -- sin/cos can
1238 // be computed and stored in the calling function.
1239
1240 inline wxRealPoint rotated_point (const wxRealPoint & p, double cos_angle, double sin_angle, const wxRealPoint & p0)
1241 {
1242     return wxRealPoint (p0.x + (p.x - p0.x) * cos_angle - (p.y - p0.y) * sin_angle,
1243                         p0.y + (p.y - p0.y) * cos_angle + (p.x - p0.x) * sin_angle);
1244 }
1245
1246 inline wxRealPoint rotated_point (double x, double y, double cos_angle, double sin_angle, const wxRealPoint & p0)
1247 {
1248     return rotated_point (wxRealPoint(x,y), cos_angle, sin_angle, p0);
1249 }
1250
1251 wxImage wxImage::Rotate(double angle, const wxPoint & centre_of_rotation, bool interpolating, wxPoint * offset_after_rotation) const
1252 {
1253     int i;
1254     angle = -angle;     // screen coordinates are a mirror image of "real" coordinates
1255
1256     // Create pointer-based array to accelerate access to wxImage's data
1257     unsigned char ** data = new unsigned char * [GetHeight()];
1258
1259     data[0] = GetData();
1260
1261     for (i = 1; i < GetHeight(); i++)
1262         data[i] = data[i - 1] + (3 * GetWidth());
1263
1264     // precompute coefficients for rotation formula
1265     // (sine and cosine of the angle)
1266     const double cos_angle = cos(angle);
1267     const double sin_angle = sin(angle);
1268
1269     // Create new Image to store the result
1270     // First, find rectangle that covers the rotated image;  to do that,
1271     // rotate the four corners
1272
1273     const wxRealPoint p0(centre_of_rotation.x, centre_of_rotation.y);
1274
1275     wxRealPoint p1 = rotated_point (0, 0, cos_angle, sin_angle, p0);
1276     wxRealPoint p2 = rotated_point (0, GetHeight(), cos_angle, sin_angle, p0);
1277     wxRealPoint p3 = rotated_point (GetWidth(), 0, cos_angle, sin_angle, p0);
1278     wxRealPoint p4 = rotated_point (GetWidth(), GetHeight(), cos_angle, sin_angle, p0);
1279
1280     int x1 = (int) floor (wxMin (wxMin(p1.x, p2.x), wxMin(p3.x, p4.x)));
1281     int y1 = (int) floor (wxMin (wxMin(p1.y, p2.y), wxMin(p3.y, p4.y)));
1282     int x2 = (int) ceil (wxMax (wxMax(p1.x, p2.x), wxMax(p3.x, p4.x)));
1283     int y2 = (int) ceil (wxMax (wxMax(p1.y, p2.y), wxMax(p3.y, p4.y)));
1284
1285     wxImage rotated (x2 - x1 + 1, y2 - y1 + 1);
1286
1287     if (offset_after_rotation != NULL)
1288     {
1289         *offset_after_rotation = wxPoint (x1, y1);
1290     }
1291
1292     // GRG: The rotated (destination) image is always accessed
1293     //      sequentially, so there is no need for a pointer-based
1294     //      array here (and in fact it would be slower).
1295     //
1296     unsigned char * dst = rotated.GetData();
1297
1298     // GRG: if the original image has a mask, use its RGB values
1299     //      as the blank pixel, else, fall back to default (black).
1300     //
1301     unsigned char blank_r = 0;
1302     unsigned char blank_g = 0;
1303     unsigned char blank_b = 0;
1304
1305     if (HasMask())
1306     {
1307         blank_r = GetMaskRed();
1308         blank_g = GetMaskGreen();
1309         blank_b = GetMaskBlue();
1310         rotated.SetMaskColour( blank_r, blank_g, blank_b );
1311     }
1312
1313     // Now, for each point of the rotated image, find where it came from, by
1314     // performing an inverse rotation (a rotation of -angle) and getting the
1315     // pixel at those coordinates
1316
1317     // GRG: I've taken the (interpolating) test out of the loops, so that
1318     //      it is done only once, instead of repeating it for each pixel.
1319
1320     int x;
1321     if (interpolating)
1322     {
1323         for (int y = 0; y < rotated.GetHeight(); y++)
1324         {
1325             for (x = 0; x < rotated.GetWidth(); x++)
1326             {
1327                 wxRealPoint src = rotated_point (x + x1, y + y1, cos_angle, -sin_angle, p0);
1328
1329                 if (-0.25 < src.x && src.x < GetWidth() - 0.75 &&
1330                     -0.25 < src.y && src.y < GetHeight() - 0.75)
1331                 {
1332                     // interpolate using the 4 enclosing grid-points.  Those
1333                     // points can be obtained using floor and ceiling of the
1334                     // exact coordinates of the point
1335                         // C.M. 2000-02-17:  when the point is near the border, special care is required.
1336
1337                     int x1, y1, x2, y2;
1338
1339                     if (0 < src.x && src.x < GetWidth() - 1)
1340                     {
1341                         x1 = wxCint(floor(src.x));
1342                         x2 = wxCint(ceil(src.x));
1343                     }
1344                     else    // else means that x is near one of the borders (0 or width-1)
1345                     {
1346                         x1 = x2 = wxCint (src.x);
1347                     }
1348
1349                     if (0 < src.y && src.y < GetHeight() - 1)
1350                     {
1351                         y1 = wxCint(floor(src.y));
1352                         y2 = wxCint(ceil(src.y));
1353                     }
1354                     else
1355                     {
1356                         y1 = y2 = wxCint (src.y);
1357                     }
1358
1359                     // get four points and the distances (square of the distance,
1360                     // for efficiency reasons) for the interpolation formula
1361
1362                     // GRG: Do not calculate the points until they are
1363                     //      really needed -- this way we can calculate
1364                     //      just one, instead of four, if d1, d2, d3
1365                     //      or d4 are < gs_Epsilon
1366
1367                     const double d1 = (src.x - x1) * (src.x - x1) + (src.y - y1) * (src.y - y1);
1368                     const double d2 = (src.x - x2) * (src.x - x2) + (src.y - y1) * (src.y - y1);
1369                     const double d3 = (src.x - x2) * (src.x - x2) + (src.y - y2) * (src.y - y2);
1370                     const double d4 = (src.x - x1) * (src.x - x1) + (src.y - y2) * (src.y - y2);
1371
1372                     // Now interpolate as a weighted average of the four surrounding
1373                     // points, where the weights are the distances to each of those points
1374
1375                     // If the point is exactly at one point of the grid of the source
1376                     // image, then don't interpolate -- just assign the pixel
1377
1378                     if (d1 < gs_Epsilon)        // d1,d2,d3,d4 are positive -- no need for abs()
1379                     {
1380                         unsigned char *p = data[y1] + (3 * x1);
1381                         *(dst++) = *(p++);
1382                         *(dst++) = *(p++);
1383                         *(dst++) = *(p++);
1384                     }
1385                     else if (d2 < gs_Epsilon)
1386                     {
1387                         unsigned char *p = data[y1] + (3 * x2);
1388                         *(dst++) = *(p++);
1389                         *(dst++) = *(p++);
1390                         *(dst++) = *(p++);
1391                     }
1392                     else if (d3 < gs_Epsilon)
1393                     {
1394                         unsigned char *p = data[y2] + (3 * x2);
1395                         *(dst++) = *(p++);
1396                         *(dst++) = *(p++);
1397                         *(dst++) = *(p++);
1398                     }
1399                     else if (d4 < gs_Epsilon)
1400                     {
1401                         unsigned char *p = data[y2] + (3 * x1);
1402                         *(dst++) = *(p++);
1403                         *(dst++) = *(p++);
1404                         *(dst++) = *(p++);
1405                     }
1406                     else
1407                     {
1408                         // weights for the weighted average are proportional to the inverse of the distance
1409                         unsigned char *v1 = data[y1] + (3 * x1);
1410                         unsigned char *v2 = data[y1] + (3 * x2);
1411                         unsigned char *v3 = data[y2] + (3 * x2);
1412                         unsigned char *v4 = data[y2] + (3 * x1);
1413
1414                         const double w1 = 1/d1, w2 = 1/d2, w3 = 1/d3, w4 = 1/d4;
1415
1416                         // GRG: Unrolled.
1417
1418                         *(dst++) = (unsigned char)
1419                             ( (w1 * *(v1++) + w2 * *(v2++) +
1420                                w3 * *(v3++) + w4 * *(v4++)) /
1421                               (w1 + w2 + w3 + w4) );
1422                         *(dst++) = (unsigned char)
1423                             ( (w1 * *(v1++) + w2 * *(v2++) +
1424                                w3 * *(v3++) + w4 * *(v4++)) /
1425                               (w1 + w2 + w3 + w4) );
1426                         *(dst++) = (unsigned char)
1427                             ( (w1 * *(v1++) + w2 * *(v2++) +
1428                                w3 * *(v3++) + w4 * *(v4++)) /
1429                               (w1 + w2 + w3 + w4) );
1430                     }
1431                 }
1432                 else
1433                 {
1434                     *(dst++) = blank_r;
1435                     *(dst++) = blank_g;
1436                     *(dst++) = blank_b;
1437                 }
1438             }
1439         }
1440     }
1441     else    // not interpolating
1442     {
1443         for (int y = 0; y < rotated.GetHeight(); y++)
1444         {
1445             for (x = 0; x < rotated.GetWidth(); x++)
1446             {
1447                 wxRealPoint src = rotated_point (x + x1, y + y1, cos_angle, -sin_angle, p0);
1448
1449                 const int xs = wxCint (src.x);      // wxCint rounds to the
1450                 const int ys = wxCint (src.y);      // closest integer
1451
1452                 if (0 <= xs && xs < GetWidth() &&
1453                     0 <= ys && ys < GetHeight())
1454                 {
1455                     unsigned char *p = data[ys] + (3 * xs);
1456                     *(dst++) = *(p++);
1457                     *(dst++) = *(p++);
1458                     *(dst++) = *(p++);
1459                 }
1460                 else
1461                 {
1462                     *(dst++) = blank_r;
1463                     *(dst++) = blank_g;
1464                     *(dst++) = blank_b;
1465                 }
1466             }
1467         }
1468     }
1469
1470     delete [] data;
1471
1472     return rotated;
1473 }
1474
1475 #endif // wxUSE_IMAGE