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