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 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  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 #include "wx/hash.h"
  35 #include "wx/utils.h"
  36 #include "wx/math.h"
  37
  38 #if wxUSE_XPM
  39 #include "wx/xpmdecod.h"
  40 #endif
  41
  42 // For memcpy
  43 #include <string.h>
  44
  45 #ifdef __SALFORDC__
  46     #undef FAR
  47 #endif
  48
  49
  50 //-----------------------------------------------------------------------------
  51 // wxImage
  52 //-----------------------------------------------------------------------------
  53
  54 class wxImageRefData: public wxObjectRefData
  55 {
  56 public:
  57     wxImageRefData();
  58     virtual ~wxImageRefData();
  59
  60     int             m_width;
  61     int             m_height;
  62     unsigned char  *m_data;
  63
  64     bool            m_hasMask;
  65     unsigned char   m_maskRed,m_maskGreen,m_maskBlue;
  66
  67     // alpha channel data, may be NULL for the formats without alpha support
  68     unsigned char  *m_alpha;
  69
  70     bool            m_ok;
  71     bool            m_static;
  72
  73 #if wxUSE_PALETTE
  74     wxPalette       m_palette;
  75 #endif // wxUSE_PALETTE
  76
  77     wxArrayString   m_optionNames;
  78     wxArrayString   m_optionValues;
  79
  80     DECLARE_NO_COPY_CLASS(wxImageRefData)
  81 };
  82
  83 wxImageRefData::wxImageRefData()
  84 {
  85     m_width = 0;
  86     m_height = 0;
  87     m_data =
  88     m_alpha = (unsigned char *) NULL;
  89
  90     m_maskRed = 0;
  91     m_maskGreen = 0;
  92     m_maskBlue = 0;
  93     m_hasMask = false;
  94
  95     m_ok = false;
  96     m_static = false;
  97 }
  98
  99 wxImageRefData::~wxImageRefData()
 100 {
 101     if (!m_static)
 102     {
 103         free( m_data );
 104         free( m_alpha );
 105     }
 106 }
 107
 108 wxList wxImage::sm_handlers;
 109
 110 wxImage wxNullImage;
 111
 112 //-----------------------------------------------------------------------------
 113
 114 #define M_IMGDATA ((wxImageRefData *)m_refData)
 115
 116 IMPLEMENT_DYNAMIC_CLASS(wxImage, wxObject)
 117
 118 wxImage::wxImage( int width, int height, bool clear )
 119 {
 120     Create( width, height, clear );
 121 }
 122
 123 wxImage::wxImage( int width, int height, unsigned char* data, bool static_data )
 124 {
 125     Create( width, height, data, static_data );
 126 }
 127
 128 wxImage::wxImage( int width, int height, unsigned char* data, unsigned char* alpha, bool static_data )
 129 {
 130     Create( width, height, data, alpha, static_data );
 131 }
 132
 133 wxImage::wxImage( const wxString& name, long type, int index )
 134 {
 135     LoadFile( name, type, index );
 136 }
 137
 138 wxImage::wxImage( const wxString& name, const wxString& mimetype, int index )
 139 {
 140     LoadFile( name, mimetype, index );
 141 }
 142
 143 #if wxUSE_STREAMS
 144 wxImage::wxImage( wxInputStream& stream, long type, int index )
 145 {
 146     LoadFile( stream, type, index );
 147 }
 148
 149 wxImage::wxImage( wxInputStream& stream, const wxString& mimetype, int index )
 150 {
 151     LoadFile( stream, mimetype, index );
 152 }
 153 #endif // wxUSE_STREAMS
 154
 155 wxImage::wxImage( const wxImage& image )
 156     : wxObject()
 157 {
 158     Ref(image);
 159 }
 160
 161 wxImage::wxImage( const wxImage* image )
 162 {
 163     if (image) Ref(*image);
 164 }
 165
 166 wxImage::wxImage( const char** xpmData )
 167 {
 168     Create(xpmData);
 169 }
 170
 171 wxImage::wxImage( char** xpmData )
 172 {
 173     Create((const char**) xpmData);
 174 }
 175
 176 bool wxImage::Create( const char** xpmData )
 177 {
 178 #if wxUSE_XPM
 179     UnRef();
 180
 181     wxXPMDecoder decoder;
 182     (*this) = decoder.ReadData(xpmData);
 183     return Ok();
 184 #else
 185     return false;
 186 #endif
 187 }
 188
 189 bool wxImage::Create( int width, int height, bool clear )
 190 {
 191     UnRef();
 192
 193     m_refData = new wxImageRefData();
 194
 195     M_IMGDATA->m_data = (unsigned char *) malloc( width*height*3 );
 196     if (!M_IMGDATA->m_data)
 197     {
 198         UnRef();
 199         return false;
 200     }
 201
 202     if (clear)
 203         memset(M_IMGDATA->m_data, 0, width*height*3);
 204
 205     M_IMGDATA->m_width = width;
 206     M_IMGDATA->m_height = height;
 207     M_IMGDATA->m_ok = true;
 208
 209     return true;
 210 }
 211
 212 bool wxImage::Create( int width, int height, unsigned char* data, bool static_data )
 213 {
 214     UnRef();
 215
 216     wxCHECK_MSG( data, false, _T("NULL data in wxImage::Create") );
 217
 218     m_refData = new wxImageRefData();
 219
 220     M_IMGDATA->m_data = data;
 221     M_IMGDATA->m_width = width;
 222     M_IMGDATA->m_height = height;
 223     M_IMGDATA->m_ok = true;
 224     M_IMGDATA->m_static = static_data;
 225
 226     return true;
 227 }
 228
 229 bool wxImage::Create( int width, int height, unsigned char* data, unsigned char* alpha, bool static_data )
 230 {
 231     UnRef();
 232
 233     wxCHECK_MSG( data, false, _T("NULL data in wxImage::Create") );
 234
 235     m_refData = new wxImageRefData();
 236
 237     M_IMGDATA->m_data = data;
 238     M_IMGDATA->m_alpha = alpha;
 239     M_IMGDATA->m_width = width;
 240     M_IMGDATA->m_height = height;
 241     M_IMGDATA->m_ok = true;
 242     M_IMGDATA->m_static = static_data;
 243
 244     return true;
 245 }
 246
 247 void wxImage::Destroy()
 248 {
 249     UnRef();
 250 }
 251
 252 wxImage wxImage::Copy() const
 253 {
 254     wxImage image;
 255
 256     wxCHECK_MSG( Ok(), image, wxT("invalid image") );
 257
 258     image.Create( M_IMGDATA->m_width, M_IMGDATA->m_height, false );
 259
 260     unsigned char *data = image.GetData();
 261
 262     wxCHECK_MSG( data, image, wxT("unable to create image") );
 263
 264     image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue );
 265     image.SetMask( M_IMGDATA->m_hasMask );
 266
 267     memcpy( data, GetData(), M_IMGDATA->m_width*M_IMGDATA->m_height*3 );
 268
 269     // also copy the image options
 270     wxImageRefData *imgData = (wxImageRefData *)image.m_refData;
 271     imgData->m_optionNames = M_IMGDATA->m_optionNames;
 272     imgData->m_optionValues = M_IMGDATA->m_optionValues;
 273
 274     return image;
 275 }
 276
 277 wxImage wxImage::ShrinkBy( int xFactor , int yFactor ) const
 278 {
 279     if( xFactor == 1 && yFactor == 1 )
 280         return Copy() ;
 281
 282     wxImage image;
 283
 284     wxCHECK_MSG( Ok(), image, wxT("invalid image") );
 285
 286     // can't scale to/from 0 size
 287     wxCHECK_MSG( (xFactor > 0) && (yFactor > 0), image,
 288                  wxT("invalid new image size") );
 289
 290     long old_height = M_IMGDATA->m_height,
 291          old_width  = M_IMGDATA->m_width;
 292
 293     wxCHECK_MSG( (old_height > 0) && (old_width > 0), image,
 294                  wxT("invalid old image size") );
 295
 296     long width = old_width / xFactor ;
 297     long height = old_height / yFactor ;
 298
 299     image.Create( width, height, false );
 300
 301     char unsigned *data = image.GetData();
 302
 303     wxCHECK_MSG( data, image, wxT("unable to create image") );
 304
 305     bool hasMask = false ;
 306     unsigned char maskRed = 0;
 307     unsigned char maskGreen = 0;
 308     unsigned char maskBlue =0 ;
 309
 310     unsigned char *source_data = M_IMGDATA->m_data;
 311     unsigned char *target_data = data;
 312     unsigned char *source_alpha = 0 ;
 313     unsigned char *target_alpha = 0 ;
 314     if (M_IMGDATA->m_hasMask)
 315     {
 316         hasMask = true ;
 317         maskRed = M_IMGDATA->m_maskRed;
 318         maskGreen = M_IMGDATA->m_maskGreen;
 319         maskBlue =M_IMGDATA->m_maskBlue ;
 320
 321         image.SetMaskColour( M_IMGDATA->m_maskRed,
 322                              M_IMGDATA->m_maskGreen,
 323                              M_IMGDATA->m_maskBlue );
 324     }
 325     else
 326     {
 327         source_alpha = M_IMGDATA->m_alpha ;
 328         if ( source_alpha )
 329         {
 330             image.SetAlpha() ;
 331             target_alpha = image.GetAlpha() ;
 332         }
 333     }
 334
 335     for (long y = 0; y < height; y++)
 336     {
 337         for (long x = 0; x < width; x++)
 338         {
 339             unsigned long avgRed = 0 ;
 340             unsigned long avgGreen = 0;
 341             unsigned long avgBlue = 0;
 342             unsigned long avgAlpha = 0 ;
 343             unsigned long counter = 0 ;
 344             // determine average
 345             for ( int y1 = 0 ; y1 < yFactor ; ++y1 )
 346             {
 347                 long y_offset = (y * yFactor + y1) * old_width;
 348                 for ( int x1 = 0 ; x1 < xFactor ; ++x1 )
 349                 {
 350                     unsigned char *pixel = source_data + 3 * ( y_offset + x * xFactor + x1 ) ;
 351                     unsigned char red = pixel[0] ;
 352                     unsigned char green = pixel[1] ;
 353                     unsigned char blue = pixel[2] ;
 354                     unsigned char alpha = 255  ;
 355                     if ( source_alpha )
 356                         alpha = *(source_alpha + y_offset + x * xFactor + x1) ;
 357                     if ( !hasMask || red != maskRed || green != maskGreen || blue != maskBlue )
 358                     {
 359                         if ( alpha > 0 )
 360                         {
 361                             avgRed += red ;
 362                             avgGreen += green ;
 363                             avgBlue += blue ;
 364                         }
 365                         avgAlpha += alpha ;
 366                         counter++ ;
 367                     }
 368                 }
 369             }
 370             if ( counter == 0 )
 371             {
 372                 *(target_data++) = M_IMGDATA->m_maskRed ;
 373                 *(target_data++) = M_IMGDATA->m_maskGreen ;
 374                 *(target_data++) = M_IMGDATA->m_maskBlue ;
 375             }
 376             else
 377             {
 378                 if ( source_alpha )
 379                     *(target_alpha++) = (unsigned char)(avgAlpha / counter ) ;
 380                 *(target_data++) = (unsigned char)(avgRed / counter);
 381                 *(target_data++) = (unsigned char)(avgGreen / counter);
 382                 *(target_data++) = (unsigned char)(avgBlue / counter);
 383             }
 384         }
 385     }
 386
 387     // In case this is a cursor, make sure the hotspot is scalled accordingly:
 388     if ( HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_X) )
 389         image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_X,
 390                 (GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_X))/xFactor);
 391     if ( HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y) )
 392         image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y,
 393                 (GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_Y))/yFactor);
 394
 395     return image;
 396 }
 397
 398 wxImage wxImage::Scale( int width, int height ) const
 399 {
 400     wxImage image;
 401
 402     wxCHECK_MSG( Ok(), image, wxT("invalid image") );
 403
 404     // can't scale to/from 0 size
 405     wxCHECK_MSG( (width > 0) && (height > 0), image,
 406                  wxT("invalid new image size") );
 407
 408     long old_height = M_IMGDATA->m_height,
 409          old_width  = M_IMGDATA->m_width;
 410     wxCHECK_MSG( (old_height > 0) && (old_width > 0), image,
 411                  wxT("invalid old image size") );
 412
 413     if ( old_width % width == 0 && old_width >= width &&
 414         old_height % height == 0 && old_height >= height )
 415     {
 416         return ShrinkBy( old_width / width , old_height / height ) ;
 417     }
 418     image.Create( width, height, false );
 419
 420     unsigned char *data = image.GetData();
 421
 422     wxCHECK_MSG( data, image, wxT("unable to create image") );
 423
 424     unsigned char *source_data = M_IMGDATA->m_data;
 425     unsigned char *target_data = data;
 426     unsigned char *source_alpha = 0 ;
 427     unsigned char *target_alpha = 0 ;
 428
 429     if (M_IMGDATA->m_hasMask)
 430     {
 431         image.SetMaskColour( M_IMGDATA->m_maskRed,
 432                              M_IMGDATA->m_maskGreen,
 433                              M_IMGDATA->m_maskBlue );
 434     }
 435     else
 436     {
 437         source_alpha = M_IMGDATA->m_alpha ;
 438         if ( source_alpha )
 439         {
 440             image.SetAlpha() ;
 441             target_alpha = image.GetAlpha() ;
 442         }
 443     }
 444
 445     long x_delta = (old_width<<16) / width;
 446     long y_delta = (old_height<<16) / height;
 447
 448     unsigned char* dest_pixel = target_data;
 449
 450     long y = 0;
 451     for ( long j = 0; j < height; j++ )
 452         {
 453         unsigned char* src_line = &source_data[(y>>16)*old_width*3];
 454         unsigned char* src_alpha_line = source_alpha ? &source_alpha[(y>>16)*old_width] : 0 ;
 455
 456         long x = 0;
 457         for ( long i = 0; i < width; i++ )
 458         {
 459              unsigned char* src_pixel = &src_line[(x>>16)*3];
 460              unsigned char* src_alpha_pixel = source_alpha ? &src_alpha_line[(x>>16)] : 0 ;
 461              dest_pixel[0] = src_pixel[0];
 462              dest_pixel[1] = src_pixel[1];
 463              dest_pixel[2] = src_pixel[2];
 464              dest_pixel += 3;
 465              if ( source_alpha )
 466                 *(target_alpha++) = *src_alpha_pixel ;
 467              x += x_delta;
 468         }
 469
 470         y += y_delta;
 471     }
 472
 473     // In case this is a cursor, make sure the hotspot is scalled accordingly:
 474     if ( HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_X) )
 475         image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_X,
 476                 (GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_X)*width)/old_width);
 477     if ( HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y) )
 478         image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y,
 479                 (GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_Y)*height)/old_height);
 480
 481     return image;
 482 }
 483
 484 wxImage wxImage::Rotate90( bool clockwise ) const
 485 {
 486     wxImage image;
 487
 488     wxCHECK_MSG( Ok(), image, wxT("invalid image") );
 489
 490     image.Create( M_IMGDATA->m_height, M_IMGDATA->m_width, false );
 491
 492     unsigned char *data = image.GetData();
 493
 494     wxCHECK_MSG( data, image, wxT("unable to create image") );
 495
 496     if (M_IMGDATA->m_hasMask)
 497         image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue );
 498
 499     long height = M_IMGDATA->m_height;
 500     long width  = M_IMGDATA->m_width;
 501
 502     unsigned char *source_data = M_IMGDATA->m_data;
 503     unsigned char *target_data;
 504
 505     for (long j = 0; j < height; j++)
 506     {
 507         for (long i = 0; i < width; i++)
 508         {
 509             if (clockwise)
 510                 target_data = data + (((i+1)*height) - j - 1)*3;
 511             else
 512                 target_data = data + ((height*(width-1)) + j - (i*height))*3;
 513             memcpy( target_data, source_data, 3 );
 514             source_data += 3;
 515         }
 516     }
 517
 518     return image;
 519 }
 520
 521 wxImage wxImage::Mirror( bool horizontally ) const
 522 {
 523     wxImage image;
 524
 525     wxCHECK_MSG( Ok(), image, wxT("invalid image") );
 526
 527     image.Create( M_IMGDATA->m_width, M_IMGDATA->m_height, false );
 528
 529     unsigned char *data = image.GetData();
 530
 531     wxCHECK_MSG( data, image, wxT("unable to create image") );
 532
 533     if (M_IMGDATA->m_hasMask)
 534         image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue );
 535
 536     long height = M_IMGDATA->m_height;
 537     long width  = M_IMGDATA->m_width;
 538
 539     unsigned char *source_data = M_IMGDATA->m_data;
 540     unsigned char *target_data;
 541
 542     if (horizontally)
 543     {
 544         for (long j = 0; j < height; j++)
 545         {
 546             data += width*3;
 547             target_data = data-3;
 548             for (long i = 0; i < width; i++)
 549             {
 550                 memcpy( target_data, source_data, 3 );
 551                 source_data += 3;
 552                 target_data -= 3;
 553             }
 554         }
 555     }
 556     else
 557     {
 558         for (long i = 0; i < height; i++)
 559         {
 560             target_data = data + 3*width*(height-1-i);
 561             memcpy( target_data, source_data, (size_t)3*width );
 562             source_data += 3*width;
 563         }
 564     }
 565
 566     return image;
 567 }
 568
 569 wxImage wxImage::GetSubImage( const wxRect &rect ) const
 570 {
 571     wxImage image;
 572
 573     wxCHECK_MSG( Ok(), image, wxT("invalid image") );
 574
 575     wxCHECK_MSG( (rect.GetLeft()>=0) && (rect.GetTop()>=0) && (rect.GetRight()<=GetWidth()) && (rect.GetBottom()<=GetHeight()),
 576                  image, wxT("invalid subimage size") );
 577
 578     int subwidth=rect.GetWidth();
 579     const int subheight=rect.GetHeight();
 580
 581     image.Create( subwidth, subheight, false );
 582
 583     unsigned char *subdata = image.GetData(), *data=GetData();
 584
 585     wxCHECK_MSG( subdata, image, wxT("unable to create image") );
 586
 587     if (M_IMGDATA->m_hasMask)
 588         image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue );
 589
 590     const int subleft=3*rect.GetLeft();
 591     const int width=3*GetWidth();
 592     subwidth*=3;
 593
 594     data+=rect.GetTop()*width+subleft;
 595
 596     for (long j = 0; j < subheight; ++j)
 597     {
 598         memcpy( subdata, data, subwidth);
 599         subdata+=subwidth;
 600         data+=width;
 601     }
 602
 603     return image;
 604 }
 605
 606 wxImage wxImage::Size( const wxSize& size, const wxPoint& pos,
 607                        int r_, int g_, int b_ ) const
 608 {
 609     wxImage image;
 610
 611     wxCHECK_MSG( Ok(), image, wxT("invalid image") );
 612     wxCHECK_MSG( (size.GetWidth() > 0) && (size.GetHeight() > 0), image, wxT("invalid size") );
 613
 614     int width = GetWidth(), height = GetHeight();
 615     image.Create(size.GetWidth(), size.GetHeight(), false);
 616
 617     unsigned char r = (unsigned char)r_;
 618     unsigned char g = (unsigned char)g_;
 619     unsigned char b = (unsigned char)b_;
 620     if ((r_ == -1) && (g_ == -1) && (b_ == -1))
 621     {
 622         GetOrFindMaskColour( &r, &g, &b );
 623         image.SetMaskColour(r, g, b);
 624     }
 625
 626     image.SetRGB(wxRect(), r, g, b);
 627
 628     wxRect subRect(pos.x, pos.y, width, height);
 629     wxRect finalRect(0, 0, size.GetWidth(), size.GetHeight());
 630
 631     subRect.Intersect(finalRect);
 632
 633     if (!subRect.IsEmpty())
 634     {
 635         if ((subRect.GetWidth() == width) && (subRect.GetHeight() == height))
 636             image.Paste(*this, pos.x, pos.y);
 637         else
 638             image.Paste(GetSubImage(subRect), pos.x, pos.y);
 639     }
 640
 641     return image;
 642 }
 643
 644 void wxImage::Paste( const wxImage &image, int x, int y )
 645 {
 646     wxCHECK_RET( Ok(), wxT("invalid image") );
 647     wxCHECK_RET( image.Ok(), wxT("invalid image") );
 648
 649     int xx = 0;
 650     int yy = 0;
 651     int width = image.GetWidth();
 652     int height = image.GetHeight();
 653
 654     if (x < 0)
 655     {
 656         xx = -x;
 657         width += x;
 658     }
 659     if (y < 0)
 660     {
 661         yy = -y;
 662         height += y;
 663     }
 664
 665     if ((x+xx)+width > M_IMGDATA->m_width)
 666         width = M_IMGDATA->m_width - (x+xx);
 667     if ((y+yy)+height > M_IMGDATA->m_height)
 668         height = M_IMGDATA->m_height - (y+yy);
 669
 670     if (width < 1) return;
 671     if (height < 1) return;
 672
 673     if ((!HasMask() && !image.HasMask()) ||
 674         (HasMask() && !image.HasMask()) ||
 675        ((HasMask() && image.HasMask() &&
 676          (GetMaskRed()==image.GetMaskRed()) &&
 677          (GetMaskGreen()==image.GetMaskGreen()) &&
 678          (GetMaskBlue()==image.GetMaskBlue()))))
 679     {
 680         width *= 3;
 681         unsigned char* source_data = image.GetData() + xx*3 + yy*3*image.GetWidth();
 682         int source_step = image.GetWidth()*3;
 683
 684         unsigned char* target_data = GetData() + (x+xx)*3 + (y+yy)*3*M_IMGDATA->m_width;
 685         int target_step = M_IMGDATA->m_width*3;
 686         for (int j = 0; j < height; j++)
 687         {
 688             memcpy( target_data, source_data, width );
 689             source_data += source_step;
 690             target_data += target_step;
 691         }
 692         return;
 693     }
 694
 695     if (!HasMask() && image.HasMask())
 696     {
 697         unsigned char r = image.GetMaskRed();
 698         unsigned char g = image.GetMaskGreen();
 699         unsigned char b = image.GetMaskBlue();
 700
 701         width *= 3;
 702         unsigned char* source_data = image.GetData() + xx*3 + yy*3*image.GetWidth();
 703         int source_step = image.GetWidth()*3;
 704
 705         unsigned char* target_data = GetData() + (x+xx)*3 + (y+yy)*3*M_IMGDATA->m_width;
 706         int target_step = M_IMGDATA->m_width*3;
 707
 708         for (int j = 0; j < height; j++)
 709         {
 710             for (int i = 0; i < width; i+=3)
 711             {
 712                 if ((source_data[i]   != r) &&
 713                     (source_data[i+1] != g) &&
 714                     (source_data[i+2] != b))
 715                 {
 716                     memcpy( target_data+i, source_data+i, 3 );
 717                 }
 718             }
 719             source_data += source_step;
 720             target_data += target_step;
 721         }
 722     }
 723 }
 724
 725 void wxImage::Replace( unsigned char r1, unsigned char g1, unsigned char b1,
 726                        unsigned char r2, unsigned char g2, unsigned char b2 )
 727 {
 728     wxCHECK_RET( Ok(), wxT("invalid image") );
 729
 730     unsigned char *data = GetData();
 731
 732     const int w = GetWidth();
 733     const int h = GetHeight();
 734
 735     for (int j = 0; j < h; j++)
 736         for (int i = 0; i < w; i++)
 737         {
 738             if ((data[0] == r1) && (data[1] == g1) && (data[2] == b1))
 739             {
 740                 data[0] = r2;
 741                 data[1] = g2;
 742                 data[2] = b2;
 743             }
 744             data += 3;
 745         }
 746 }
 747
 748 wxImage wxImage::ConvertToMono( unsigned char r, unsigned char g, unsigned char b ) const
 749 {
 750     wxImage image;
 751
 752     wxCHECK_MSG( Ok(), image, wxT("invalid image") );
 753
 754     image.Create( M_IMGDATA->m_width, M_IMGDATA->m_height, false );
 755
 756     unsigned char *data = image.GetData();
 757
 758     wxCHECK_MSG( data, image, wxT("unable to create image") );
 759
 760     if (M_IMGDATA->m_hasMask)
 761     {
 762         if (M_IMGDATA->m_maskRed == r && M_IMGDATA->m_maskGreen == g &&
 763                                          M_IMGDATA->m_maskBlue == b)
 764             image.SetMaskColour( 255, 255, 255 );
 765         else
 766             image.SetMaskColour( 0, 0, 0 );
 767     }
 768
 769     long size = M_IMGDATA->m_height * M_IMGDATA->m_width;
 770
 771     unsigned char *srcd = M_IMGDATA->m_data;
 772     unsigned char *tard = image.GetData();
 773
 774     for ( long i = 0; i < size; i++, srcd += 3, tard += 3 )
 775     {
 776         if (srcd[0] == r && srcd[1] == g && srcd[2] == b)
 777             tard[0] = tard[1] = tard[2] = 255;
 778         else
 779             tard[0] = tard[1] = tard[2] = 0;
 780     }
 781
 782     return image;
 783 }
 784
 785 long wxImage::XYToIndex(int x, int y) const
 786 {
 787     if ( Ok() &&
 788             x >= 0 && y >= 0 &&
 789                 x < M_IMGDATA->m_width && y < M_IMGDATA->m_height )
 790     {
 791         return y*M_IMGDATA->m_width + x;
 792     }
 793
 794     return -1;
 795 }
 796
 797 void wxImage::SetRGB( int x, int y, unsigned char r, unsigned char g, unsigned char b )
 798 {
 799     long pos = XYToIndex(x, y);
 800     wxCHECK_RET( pos != -1, wxT("invalid image coordinates") );
 801
 802     pos *= 3;
 803
 804     M_IMGDATA->m_data[ pos   ] = r;
 805     M_IMGDATA->m_data[ pos+1 ] = g;
 806     M_IMGDATA->m_data[ pos+2 ] = b;
 807 }
 808
 809 void wxImage::SetRGB( const wxRect& rect_, unsigned char r, unsigned char g, unsigned char b )
 810 {
 811     wxCHECK_RET( Ok(), wxT("invalid image") );
 812
 813     wxRect rect(rect_);
 814     wxRect imageRect(0, 0, GetWidth(), GetHeight());
 815     if ( rect == wxRect() )
 816     {
 817         rect = imageRect;
 818     }
 819     else
 820     {
 821         wxCHECK_RET( imageRect.Inside(rect.GetTopLeft()) &&
 822                      imageRect.Inside(rect.GetBottomRight()),
 823                      wxT("invalid bounding rectangle") );
 824     }
 825
 826     int x1 = rect.GetLeft(),
 827         y1 = rect.GetTop(),
 828         x2 = rect.GetRight() + 1,
 829         y2 = rect.GetBottom() + 1;
 830
 831     unsigned char *data wxDUMMY_INITIALIZE(NULL);
 832     int x, y, width = GetWidth();
 833     for (y = y1; y < y2; y++)
 834     {
 835         data = M_IMGDATA->m_data + (y*width + x1)*3;
 836         for (x = x1; x < x2; x++)
 837         {
 838             *data++ = r;
 839             *data++ = g;
 840             *data++ = b;
 841         }
 842     }
 843 }
 844
 845 unsigned char wxImage::GetRed( int x, int y ) const
 846 {
 847     long pos = XYToIndex(x, y);
 848     wxCHECK_MSG( pos != -1, 0, wxT("invalid image coordinates") );
 849
 850     pos *= 3;
 851
 852     return M_IMGDATA->m_data[pos];
 853 }
 854
 855 unsigned char wxImage::GetGreen( int x, int y ) const
 856 {
 857     long pos = XYToIndex(x, y);
 858     wxCHECK_MSG( pos != -1, 0, wxT("invalid image coordinates") );
 859
 860     pos *= 3;
 861
 862     return M_IMGDATA->m_data[pos+1];
 863 }
 864
 865 unsigned char wxImage::GetBlue( int x, int y ) const
 866 {
 867     long pos = XYToIndex(x, y);
 868     wxCHECK_MSG( pos != -1, 0, wxT("invalid image coordinates") );
 869
 870     pos *= 3;
 871
 872     return M_IMGDATA->m_data[pos+2];
 873 }
 874
 875 bool wxImage::Ok() const
 876 {
 877     // image of 0 width or height can't be considered ok - at least because it
 878     // causes crashes in ConvertToBitmap() if we don't catch it in time
 879     wxImageRefData *data = M_IMGDATA;
 880     return data && data->m_ok && data->m_width && data->m_height;
 881 }
 882
 883 unsigned char *wxImage::GetData() const
 884 {
 885     wxCHECK_MSG( Ok(), (unsigned char *)NULL, wxT("invalid image") );
 886
 887     return M_IMGDATA->m_data;
 888 }
 889
 890 void wxImage::SetData( unsigned char *data, bool static_data  )
 891 {
 892     wxCHECK_RET( Ok(), wxT("invalid image") );
 893
 894     wxImageRefData *newRefData = new wxImageRefData();
 895
 896     newRefData->m_width = M_IMGDATA->m_width;
 897     newRefData->m_height = M_IMGDATA->m_height;
 898     newRefData->m_data = data;
 899     newRefData->m_ok = true;
 900     newRefData->m_maskRed = M_IMGDATA->m_maskRed;
 901     newRefData->m_maskGreen = M_IMGDATA->m_maskGreen;
 902     newRefData->m_maskBlue = M_IMGDATA->m_maskBlue;
 903     newRefData->m_hasMask = M_IMGDATA->m_hasMask;
 904     newRefData->m_static = static_data;
 905
 906     UnRef();
 907
 908     m_refData = newRefData;
 909 }
 910
 911 void wxImage::SetData( unsigned char *data, int new_width, int new_height, bool static_data )
 912 {
 913     wxImageRefData *newRefData = new wxImageRefData();
 914
 915     if (m_refData)
 916     {
 917         newRefData->m_width = new_width;
 918         newRefData->m_height = new_height;
 919         newRefData->m_data = data;
 920         newRefData->m_ok = true;
 921         newRefData->m_maskRed = M_IMGDATA->m_maskRed;
 922         newRefData->m_maskGreen = M_IMGDATA->m_maskGreen;
 923         newRefData->m_maskBlue = M_IMGDATA->m_maskBlue;
 924         newRefData->m_hasMask = M_IMGDATA->m_hasMask;
 925     }
 926     else
 927     {
 928         newRefData->m_width = new_width;
 929         newRefData->m_height = new_height;
 930         newRefData->m_data = data;
 931         newRefData->m_ok = true;
 932     }
 933     newRefData->m_static = static_data;
 934
 935     UnRef();
 936
 937     m_refData = newRefData;
 938 }
 939
 940 // ----------------------------------------------------------------------------
 941 // alpha channel support
 942 // ----------------------------------------------------------------------------
 943
 944 void wxImage::SetAlpha(int x, int y, unsigned char alpha)
 945 {
 946     wxCHECK_RET( HasAlpha(), wxT("no alpha channel") );
 947
 948     long pos = XYToIndex(x, y);
 949     wxCHECK_RET( pos != -1, wxT("invalid image coordinates") );
 950
 951     M_IMGDATA->m_alpha[pos] = alpha;
 952 }
 953
 954 unsigned char wxImage::GetAlpha(int x, int y) const
 955 {
 956     wxCHECK_MSG( HasAlpha(), 0, wxT("no alpha channel") );
 957
 958     long pos = XYToIndex(x, y);
 959     wxCHECK_MSG( pos != -1, 0, wxT("invalid image coordinates") );
 960
 961     return M_IMGDATA->m_alpha[pos];
 962 }
 963
 964 bool
 965 wxImage::ConvertColourToAlpha(unsigned char r, unsigned char g, unsigned char b)
 966 {
 967     SetAlpha(NULL);
 968
 969     const int w = M_IMGDATA->m_width;
 970     const int h = M_IMGDATA->m_height;
 971
 972     unsigned char *alpha = GetAlpha();
 973     unsigned char *data = GetData();
 974
 975     for ( int y = 0; y < h; y++ )
 976     {
 977         for ( int x = 0; x < w; x++ )
 978         {
 979             *alpha++ = *data;
 980             *data++ = r;
 981             *data++ = g;
 982             *data++ = b;
 983         }
 984     }
 985
 986     return true;
 987 }
 988
 989 void wxImage::SetAlpha( unsigned char *alpha, bool static_data )
 990 {
 991     wxCHECK_RET( Ok(), wxT("invalid image") );
 992
 993     if ( !alpha )
 994     {
 995         alpha = (unsigned char *)malloc(M_IMGDATA->m_width*M_IMGDATA->m_height);
 996     }
 997
 998     free(M_IMGDATA->m_alpha);
 999     M_IMGDATA->m_alpha = alpha;
1000     M_IMGDATA->m_static = static_data;
1001 }
1002
1003 unsigned char *wxImage::GetAlpha() const
1004 {
1005     wxCHECK_MSG( Ok(), (unsigned char *)NULL, wxT("invalid image") );
1006
1007     return M_IMGDATA->m_alpha;
1008 }
1009
1010 void wxImage::InitAlpha()
1011 {
1012     wxCHECK_RET( !HasAlpha(), wxT("image already has an alpha channel") );
1013
1014     // initialize memory for alpha channel
1015     SetAlpha();
1016
1017     unsigned char *alpha = M_IMGDATA->m_alpha;
1018     const size_t lenAlpha = M_IMGDATA->m_width * M_IMGDATA->m_height;
1019
1020     static const unsigned char ALPHA_TRANSPARENT = 0;
1021     static const unsigned char ALPHA_OPAQUE = 0xff;
1022     if ( HasMask() )
1023     {
1024         // use the mask to initialize the alpha channel.
1025         const unsigned char * const alphaEnd = alpha + lenAlpha;
1026
1027         const unsigned char mr = M_IMGDATA->m_maskRed;
1028         const unsigned char mg = M_IMGDATA->m_maskGreen;
1029         const unsigned char mb = M_IMGDATA->m_maskBlue;
1030         for ( unsigned char *src = M_IMGDATA->m_data;
1031               alpha < alphaEnd;
1032               src += 3, alpha++ )
1033         {
1034             *alpha = (src[0] == mr && src[1] == mg && src[2] == mb)
1035                             ? ALPHA_TRANSPARENT
1036                             : ALPHA_OPAQUE;
1037         }
1038
1039         M_IMGDATA->m_hasMask = false;
1040     }
1041     else // no mask
1042     {
1043         // make the image fully opaque
1044         memset(alpha, ALPHA_OPAQUE, lenAlpha);
1045     }
1046 }
1047
1048 // ----------------------------------------------------------------------------
1049 // mask support
1050 // ----------------------------------------------------------------------------
1051
1052 void wxImage::SetMaskColour( unsigned char r, unsigned char g, unsigned char b )
1053 {
1054     wxCHECK_RET( Ok(), wxT("invalid image") );
1055
1056     M_IMGDATA->m_maskRed = r;
1057     M_IMGDATA->m_maskGreen = g;
1058     M_IMGDATA->m_maskBlue = b;
1059     M_IMGDATA->m_hasMask = true;
1060 }
1061
1062 bool wxImage::GetOrFindMaskColour( unsigned char *r, unsigned char *g, unsigned char *b ) const
1063 {
1064     wxCHECK_MSG( Ok(), false, wxT("invalid image") );
1065
1066     if (M_IMGDATA->m_hasMask)
1067     {
1068         if (r) *r = M_IMGDATA->m_maskRed;
1069         if (g) *g = M_IMGDATA->m_maskGreen;
1070         if (b) *b = M_IMGDATA->m_maskBlue;
1071         return true;
1072     }
1073     else
1074     {
1075         FindFirstUnusedColour(r, g, b);
1076         return false;
1077     }
1078 }
1079
1080 unsigned char wxImage::GetMaskRed() const
1081 {
1082     wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
1083
1084     return M_IMGDATA->m_maskRed;
1085 }
1086
1087 unsigned char wxImage::GetMaskGreen() const
1088 {
1089     wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
1090
1091     return M_IMGDATA->m_maskGreen;
1092 }
1093
1094 unsigned char wxImage::GetMaskBlue() const
1095 {
1096     wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
1097
1098     return M_IMGDATA->m_maskBlue;
1099 }
1100
1101 void wxImage::SetMask( bool mask )
1102 {
1103     wxCHECK_RET( Ok(), wxT("invalid image") );
1104
1105     M_IMGDATA->m_hasMask = mask;
1106 }
1107
1108 bool wxImage::HasMask() const
1109 {
1110     wxCHECK_MSG( Ok(), false, wxT("invalid image") );
1111
1112     return M_IMGDATA->m_hasMask;
1113 }
1114
1115 int wxImage::GetWidth() const
1116 {
1117     wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
1118
1119     return M_IMGDATA->m_width;
1120 }
1121
1122 int wxImage::GetHeight() const
1123 {
1124     wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
1125
1126     return M_IMGDATA->m_height;
1127 }
1128
1129 bool wxImage::SetMaskFromImage(const wxImage& mask,
1130                                unsigned char mr, unsigned char mg, unsigned char mb)
1131 {
1132     // check that the images are the same size
1133     if ( (M_IMGDATA->m_height != mask.GetHeight() ) || (M_IMGDATA->m_width != mask.GetWidth () ) )
1134     {
1135         wxLogError( _("Image and mask have different sizes.") );
1136         return false;
1137     }
1138
1139     // find unused colour
1140     unsigned char r,g,b ;
1141     if (!FindFirstUnusedColour(&r, &g, &b))
1142     {
1143         wxLogError( _("No unused colour in image being masked.") );
1144         return false ;
1145     }
1146
1147     unsigned char *imgdata = GetData();
1148     unsigned char *maskdata = mask.GetData();
1149
1150     const int w = GetWidth();
1151     const int h = GetHeight();
1152
1153     for (int j = 0; j < h; j++)
1154     {
1155         for (int i = 0; i < w; i++)
1156         {
1157             if ((maskdata[0] == mr) && (maskdata[1]  == mg) && (maskdata[2] == mb))
1158             {
1159                 imgdata[0] = r;
1160                 imgdata[1] = g;
1161                 imgdata[2] = b;
1162             }
1163             imgdata  += 3;
1164             maskdata += 3;
1165         }
1166     }
1167
1168     SetMaskColour(r, g, b);
1169     SetMask(true);
1170
1171     return true;
1172 }
1173
1174 bool wxImage::ConvertAlphaToMask(unsigned char threshold)
1175 {
1176     if (!HasAlpha())
1177         return true;
1178
1179     unsigned char mr, mg, mb;
1180     if (!FindFirstUnusedColour(&mr, &mg, &mb))
1181     {
1182         wxLogError( _("No unused colour in image being masked.") );
1183         return false;
1184     }
1185
1186     SetMask(true);
1187     SetMaskColour(mr, mg, mb);
1188
1189     unsigned char *imgdata = GetData();
1190     unsigned char *alphadata = GetAlpha();
1191
1192     int w = GetWidth();
1193     int h = GetHeight();
1194
1195     for (int y = 0; y < h; y++)
1196     {
1197         for (int x = 0; x < w; x++, imgdata += 3, alphadata++)
1198         {
1199             if (*alphadata < threshold)
1200             {
1201                 imgdata[0] = mr;
1202                 imgdata[1] = mg;
1203                 imgdata[2] = mb;
1204             }
1205         }
1206     }
1207
1208     free(M_IMGDATA->m_alpha);
1209     M_IMGDATA->m_alpha = NULL;
1210
1211     return true;
1212 }
1213
1214 #if wxUSE_PALETTE
1215
1216 // Palette functions
1217
1218 bool wxImage::HasPalette() const
1219 {
1220     if (!Ok())
1221         return false;
1222
1223     return M_IMGDATA->m_palette.Ok();
1224 }
1225
1226 const wxPalette& wxImage::GetPalette() const
1227 {
1228     wxCHECK_MSG( Ok(), wxNullPalette, wxT("invalid image") );
1229
1230     return M_IMGDATA->m_palette;
1231 }
1232
1233 void wxImage::SetPalette(const wxPalette& palette)
1234 {
1235     wxCHECK_RET( Ok(), wxT("invalid image") );
1236
1237     M_IMGDATA->m_palette = palette;
1238 }
1239
1240 #endif // wxUSE_PALETTE
1241
1242 // Option functions (arbitrary name/value mapping)
1243 void wxImage::SetOption(const wxString& name, const wxString& value)
1244 {
1245     wxCHECK_RET( Ok(), wxT("invalid image") );
1246
1247     int idx = M_IMGDATA->m_optionNames.Index(name, false);
1248     if (idx == wxNOT_FOUND)
1249     {
1250         M_IMGDATA->m_optionNames.Add(name);
1251         M_IMGDATA->m_optionValues.Add(value);
1252     }
1253     else
1254     {
1255         M_IMGDATA->m_optionNames[idx] = name;
1256         M_IMGDATA->m_optionValues[idx] = value;
1257     }
1258 }
1259
1260 void wxImage::SetOption(const wxString& name, int value)
1261 {
1262     wxString valStr;
1263     valStr.Printf(wxT("%d"), value);
1264     SetOption(name, valStr);
1265 }
1266
1267 wxString wxImage::GetOption(const wxString& name) const
1268 {
1269     wxCHECK_MSG( Ok(), wxEmptyString, wxT("invalid image") );
1270
1271     int idx = M_IMGDATA->m_optionNames.Index(name, false);
1272     if (idx == wxNOT_FOUND)
1273         return wxEmptyString;
1274     else
1275         return M_IMGDATA->m_optionValues[idx];
1276 }
1277
1278 int wxImage::GetOptionInt(const wxString& name) const
1279 {
1280     return wxAtoi(GetOption(name));
1281 }
1282
1283 bool wxImage::HasOption(const wxString& name) const
1284 {
1285     wxCHECK_MSG( Ok(), false, wxT("invalid image") );
1286
1287     return (M_IMGDATA->m_optionNames.Index(name, false) != wxNOT_FOUND);
1288 }
1289
1290 bool wxImage::LoadFile( const wxString& filename, long type, int index )
1291 {
1292 #if wxUSE_STREAMS
1293     if (wxFileExists(filename))
1294     {
1295         wxFileInputStream stream(filename);
1296         wxBufferedInputStream bstream( stream );
1297         return LoadFile(bstream, type, index);
1298     }
1299     else
1300     {
1301         wxLogError( _("Can't load image from file '%s': file does not exist."), filename.c_str() );
1302
1303         return false;
1304     }
1305 #else // !wxUSE_STREAMS
1306     return false;
1307 #endif // wxUSE_STREAMS
1308 }
1309
1310 bool wxImage::LoadFile( const wxString& filename, const wxString& mimetype, int index )
1311 {
1312 #if wxUSE_STREAMS
1313     if (wxFileExists(filename))
1314     {
1315         wxFileInputStream stream(filename);
1316         wxBufferedInputStream bstream( stream );
1317         return LoadFile(bstream, mimetype, index);
1318     }
1319     else
1320     {
1321         wxLogError( _("Can't load image from file '%s': file does not exist."), filename.c_str() );
1322
1323         return false;
1324     }
1325 #else // !wxUSE_STREAMS
1326     return false;
1327 #endif // wxUSE_STREAMS
1328 }
1329
1330
1331
1332 bool wxImage::SaveFile( const wxString& filename ) const
1333 {
1334     wxString ext = filename.AfterLast('.').Lower();
1335
1336     wxImageHandler * pHandler = FindHandler(ext, -1);
1337     if (pHandler)
1338     {
1339         SaveFile(filename, pHandler->GetType());
1340         return true;
1341     }
1342
1343     wxLogError(_("Can't save image to file '%s': unknown extension."), filename.c_str());
1344
1345     return false;
1346 }
1347
1348 bool wxImage::SaveFile( const wxString& filename, int type ) const
1349 {
1350 #if wxUSE_STREAMS
1351     wxCHECK_MSG( Ok(), false, wxT("invalid image") );
1352
1353     ((wxImage*)this)->SetOption(wxIMAGE_OPTION_FILENAME, filename);
1354
1355     wxFileOutputStream stream(filename);
1356
1357     if ( stream.IsOk() )
1358     {
1359         wxBufferedOutputStream bstream( stream );
1360         return SaveFile(bstream, type);
1361     }
1362 #endif // wxUSE_STREAMS
1363
1364     return false;
1365 }
1366
1367 bool wxImage::SaveFile( const wxString& filename, const wxString& mimetype ) const
1368 {
1369 #if wxUSE_STREAMS
1370     wxCHECK_MSG( Ok(), false, wxT("invalid image") );
1371
1372     ((wxImage*)this)->SetOption(wxIMAGE_OPTION_FILENAME, filename);
1373
1374     wxFileOutputStream stream(filename);
1375
1376     if ( stream.IsOk() )
1377     {
1378         wxBufferedOutputStream bstream( stream );
1379         return SaveFile(bstream, mimetype);
1380     }
1381 #endif // wxUSE_STREAMS
1382
1383     return false;
1384 }
1385
1386 bool wxImage::CanRead( const wxString &name )
1387 {
1388 #if wxUSE_STREAMS
1389   wxFileInputStream stream(name);
1390   return CanRead(stream);
1391 #else
1392   return false;
1393 #endif
1394 }
1395
1396 int wxImage::GetImageCount( const wxString &name, long type )
1397 {
1398 #if wxUSE_STREAMS
1399   wxFileInputStream stream(name);
1400   if (stream.Ok())
1401       return GetImageCount(stream, type);
1402 #endif
1403
1404   return 0;
1405 }
1406
1407 #if wxUSE_STREAMS
1408
1409 bool wxImage::CanRead( wxInputStream &stream )
1410 {
1411     const wxList& list = GetHandlers();
1412
1413     for ( wxList::compatibility_iterator node = list.GetFirst(); node; node = node->GetNext() )
1414     {
1415         wxImageHandler *handler=(wxImageHandler*)node->GetData();
1416         if (handler->CanRead( stream ))
1417             return true;
1418     }
1419
1420     return false;
1421 }
1422
1423 int wxImage::GetImageCount( wxInputStream &stream, long type )
1424 {
1425     wxImageHandler *handler;
1426
1427     if ( type == wxBITMAP_TYPE_ANY )
1428     {
1429         wxList &list=GetHandlers();
1430
1431         for (wxList::compatibility_iterator node = list.GetFirst(); node; node = node->GetNext())
1432         {
1433              handler=(wxImageHandler*)node->GetData();
1434              if ( handler->CanRead(stream) )
1435                  return handler->GetImageCount(stream);
1436
1437         }
1438
1439         wxLogWarning(_("No handler found for image type."));
1440         return 0;
1441     }
1442
1443     handler = FindHandler(type);
1444
1445     if ( !handler )
1446     {
1447         wxLogWarning(_("No image handler for type %d defined."), type);
1448         return false;
1449     }
1450
1451     if ( handler->CanRead(stream) )
1452     {
1453         return handler->GetImageCount(stream);
1454     }
1455     else
1456     {
1457         wxLogError(_("Image file is not of type %d."), type);
1458         return 0;
1459     }
1460 }
1461
1462 bool wxImage::LoadFile( wxInputStream& stream, long type, int index )
1463 {
1464     UnRef();
1465
1466     m_refData = new wxImageRefData;
1467
1468     wxImageHandler *handler;
1469
1470     if ( type == wxBITMAP_TYPE_ANY )
1471     {
1472         wxList &list=GetHandlers();
1473
1474         for ( wxList::compatibility_iterator node = list.GetFirst(); node; node = node->GetNext() )
1475         {
1476              handler=(wxImageHandler*)node->GetData();
1477              if ( handler->CanRead(stream) )
1478                  return handler->LoadFile(this, stream, true/*verbose*/, index);
1479
1480         }
1481
1482         wxLogWarning( _("No handler found for image type.") );
1483         return false;
1484     }
1485
1486     handler = FindHandler(type);
1487
1488     if (handler == 0)
1489     {
1490         wxLogWarning( _("No image handler for type %d defined."), type );
1491
1492         return false;
1493     }
1494
1495     return handler->LoadFile(this, stream, true/*verbose*/, index);
1496 }
1497
1498 bool wxImage::LoadFile( wxInputStream& stream, const wxString& mimetype, int index )
1499 {
1500     UnRef();
1501
1502     m_refData = new wxImageRefData;
1503
1504     wxImageHandler *handler = FindHandlerMime(mimetype);
1505
1506     if (handler == 0)
1507     {
1508         wxLogWarning( _("No image handler for type %s defined."), mimetype.GetData() );
1509
1510         return false;
1511     }
1512
1513     return handler->LoadFile( this, stream, true/*verbose*/, index );
1514 }
1515
1516 bool wxImage::SaveFile( wxOutputStream& stream, int type ) const
1517 {
1518     wxCHECK_MSG( Ok(), false, wxT("invalid image") );
1519
1520     wxImageHandler *handler = FindHandler(type);
1521     if ( !handler )
1522     {
1523         wxLogWarning( _("No image handler for type %d defined."), type );
1524
1525         return false;
1526     }
1527
1528     return handler->SaveFile( (wxImage*)this, stream );
1529 }
1530
1531 bool wxImage::SaveFile( wxOutputStream& stream, const wxString& mimetype ) const
1532 {
1533     wxCHECK_MSG( Ok(), false, wxT("invalid image") );
1534
1535     wxImageHandler *handler = FindHandlerMime(mimetype);
1536     if ( !handler )
1537     {
1538         wxLogWarning( _("No image handler for type %s defined."), mimetype.GetData() );
1539
1540         return false;
1541     }
1542
1543     return handler->SaveFile( (wxImage*)this, stream );
1544 }
1545 #endif // wxUSE_STREAMS
1546
1547 void wxImage::AddHandler( wxImageHandler *handler )
1548 {
1549     // Check for an existing handler of the type being added.
1550     if (FindHandler( handler->GetType() ) == 0)
1551     {
1552         sm_handlers.Append( handler );
1553     }
1554     else
1555     {
1556         // This is not documented behaviour, merely the simplest 'fix'
1557         // for preventing duplicate additions.  If someone ever has
1558         // a good reason to add and remove duplicate handlers (and they
1559         // may) we should probably refcount the duplicates.
1560         //   also an issue in InsertHandler below.
1561
1562         wxLogDebug( _T("Adding duplicate image handler for '%s'"),
1563                     handler->GetName().c_str() );
1564         delete handler;
1565     }
1566 }
1567
1568 void wxImage::InsertHandler( wxImageHandler *handler )
1569 {
1570     // Check for an existing handler of the type being added.
1571     if (FindHandler( handler->GetType() ) == 0)
1572     {
1573         sm_handlers.Insert( handler );
1574     }
1575     else
1576     {
1577         // see AddHandler for additional comments.
1578         wxLogDebug( _T("Inserting duplicate image handler for '%s'"),
1579                     handler->GetName().c_str() );
1580         delete handler;
1581     }
1582 }
1583
1584 bool wxImage::RemoveHandler( const wxString& name )
1585 {
1586     wxImageHandler *handler = FindHandler(name);
1587     if (handler)
1588     {
1589         sm_handlers.DeleteObject(handler);
1590         delete handler;
1591         return true;
1592     }
1593     else
1594         return false;
1595 }
1596
1597 wxImageHandler *wxImage::FindHandler( const wxString& name )
1598 {
1599     wxList::compatibility_iterator node = sm_handlers.GetFirst();
1600     while (node)
1601     {
1602         wxImageHandler *handler = (wxImageHandler*)node->GetData();
1603         if (handler->GetName().Cmp(name) == 0) return handler;
1604
1605         node = node->GetNext();
1606     }
1607     return 0;
1608 }
1609
1610 wxImageHandler *wxImage::FindHandler( const wxString& extension, long bitmapType )
1611 {
1612     wxList::compatibility_iterator node = sm_handlers.GetFirst();
1613     while (node)
1614     {
1615         wxImageHandler *handler = (wxImageHandler*)node->GetData();
1616         if ( (handler->GetExtension().Cmp(extension) == 0) &&
1617             (bitmapType == -1 || handler->GetType() == bitmapType) )
1618             return handler;
1619         node = node->GetNext();
1620     }
1621     return 0;
1622 }
1623
1624 wxImageHandler *wxImage::FindHandler( long bitmapType )
1625 {
1626     wxList::compatibility_iterator node = sm_handlers.GetFirst();
1627     while (node)
1628     {
1629         wxImageHandler *handler = (wxImageHandler *)node->GetData();
1630         if (handler->GetType() == bitmapType) return handler;
1631         node = node->GetNext();
1632     }
1633     return 0;
1634 }
1635
1636 wxImageHandler *wxImage::FindHandlerMime( const wxString& mimetype )
1637 {
1638     wxList::compatibility_iterator node = sm_handlers.GetFirst();
1639     while (node)
1640     {
1641         wxImageHandler *handler = (wxImageHandler *)node->GetData();
1642         if (handler->GetMimeType().IsSameAs(mimetype, false)) return handler;
1643         node = node->GetNext();
1644     }
1645     return 0;
1646 }
1647
1648 void wxImage::InitStandardHandlers()
1649 {
1650 #if wxUSE_STREAMS
1651     AddHandler(new wxBMPHandler);
1652 #endif // wxUSE_STREAMS
1653 }
1654
1655 void wxImage::CleanUpHandlers()
1656 {
1657     wxList::compatibility_iterator node = sm_handlers.GetFirst();
1658     while (node)
1659     {
1660         wxImageHandler *handler = (wxImageHandler *)node->GetData();
1661         wxList::compatibility_iterator next = node->GetNext();
1662         delete handler;
1663         node = next;
1664     }
1665
1666     sm_handlers.Clear();
1667 }
1668
1669 wxString wxImage::GetImageExtWildcard()
1670 {
1671     wxString fmts;
1672
1673     wxList& Handlers = wxImage::GetHandlers();
1674     wxList::compatibility_iterator Node = Handlers.GetFirst();
1675     while ( Node )
1676     {
1677         wxImageHandler* Handler = (wxImageHandler*)Node->GetData();
1678         fmts += wxT("*.") + Handler->GetExtension();
1679         Node = Node->GetNext();
1680         if ( Node ) fmts += wxT(";");
1681     }
1682
1683     return wxT("(") + fmts + wxT(")|") + fmts;
1684 }
1685
1686 //-----------------------------------------------------------------------------
1687 // wxImageHandler
1688 //-----------------------------------------------------------------------------
1689
1690 IMPLEMENT_ABSTRACT_CLASS(wxImageHandler,wxObject)
1691
1692 #if wxUSE_STREAMS
1693 bool wxImageHandler::LoadFile( wxImage *WXUNUSED(image), wxInputStream& WXUNUSED(stream), bool WXUNUSED(verbose), int WXUNUSED(index) )
1694 {
1695     return false;
1696 }
1697
1698 bool wxImageHandler::SaveFile( wxImage *WXUNUSED(image), wxOutputStream& WXUNUSED(stream), bool WXUNUSED(verbose) )
1699 {
1700     return false;
1701 }
1702
1703 int wxImageHandler::GetImageCount( wxInputStream& WXUNUSED(stream) )
1704 {
1705     return 1;
1706 }
1707
1708 bool wxImageHandler::CanRead( const wxString& name )
1709 {
1710     if (wxFileExists(name))
1711     {
1712         wxFileInputStream stream(name);
1713         return CanRead(stream);
1714     }
1715
1716     wxLogError( _("Can't check image format of file '%s': file does not exist."), name.c_str() );
1717
1718     return false;
1719 }
1720
1721 bool wxImageHandler::CallDoCanRead(wxInputStream& stream)
1722 {
1723     wxFileOffset posOld = stream.TellI();
1724     if ( posOld == wxInvalidOffset )
1725     {
1726         // can't test unseekable stream
1727         return false;
1728     }
1729
1730     bool ok = DoCanRead(stream);
1731
1732     // restore the old position to be able to test other formats and so on
1733     if ( stream.SeekI(posOld) == wxInvalidOffset )
1734     {
1735         wxLogDebug(_T("Failed to rewind the stream in wxImageHandler!"));
1736
1737         // reading would fail anyhow as we're not at the right position
1738         return false;
1739     }
1740
1741     return ok;
1742 }
1743
1744 #endif // wxUSE_STREAMS
1745
1746 // ----------------------------------------------------------------------------
1747 // image histogram stuff
1748 // ----------------------------------------------------------------------------
1749
1750 bool
1751 wxImageHistogram::FindFirstUnusedColour(unsigned char *r,
1752                                         unsigned char *g,
1753                                         unsigned char *b,
1754                                         unsigned char r2,
1755                                         unsigned char b2,
1756                                         unsigned char g2) const
1757 {
1758     unsigned long key = MakeKey(r2, g2, b2);
1759
1760     while ( find(key) != end() )
1761     {
1762         // color already used
1763         r2++;
1764         if ( r2 >= 255 )
1765         {
1766             r2 = 0;
1767             g2++;
1768             if ( g2 >= 255 )
1769             {
1770                 g2 = 0;
1771                 b2++;
1772                 if ( b2 >= 255 )
1773                 {
1774                     wxLogError(_("No unused colour in image.") );
1775                     return false;
1776                 }
1777             }
1778         }
1779
1780         key = MakeKey(r2, g2, b2);
1781     }
1782
1783     if ( r )
1784         *r = r2;
1785     if ( g )
1786         *g = g2;
1787     if ( b )
1788         *b = b2;
1789
1790     return true;
1791 }
1792
1793 bool
1794 wxImage::FindFirstUnusedColour(unsigned char *r,
1795                                unsigned char *g,
1796                                unsigned char *b,
1797                                unsigned char r2,
1798                                unsigned char b2,
1799                                unsigned char g2) const
1800 {
1801     wxImageHistogram histogram;
1802
1803     ComputeHistogram(histogram);
1804
1805     return histogram.FindFirstUnusedColour(r, g, b, r2, g2, b2);
1806 }
1807
1808
1809
1810 // GRG, Dic/99
1811 // Counts and returns the number of different colours. Optionally stops
1812 // when it exceeds 'stopafter' different colours. This is useful, for
1813 // example, to see if the image can be saved as 8-bit (256 colour or
1814 // less, in this case it would be invoked as CountColours(256)). Default
1815 // value for stopafter is -1 (don't care).
1816 //
1817 unsigned long wxImage::CountColours( unsigned long stopafter ) const
1818 {
1819     wxHashTable h;
1820     wxObject dummy;
1821     unsigned char r, g, b;
1822     unsigned char *p;
1823     unsigned long size, nentries, key;
1824
1825     p = GetData();
1826     size = GetWidth() * GetHeight();
1827     nentries = 0;
1828
1829     for (unsigned long j = 0; (j < size) && (nentries <= stopafter) ; j++)
1830     {
1831         r = *(p++);
1832         g = *(p++);
1833         b = *(p++);
1834         key = wxImageHistogram::MakeKey(r, g, b);
1835
1836         if (h.Get(key) == NULL)
1837         {
1838             h.Put(key, &dummy);
1839             nentries++;
1840         }
1841     }
1842
1843     return nentries;
1844 }
1845
1846
1847 unsigned long wxImage::ComputeHistogram( wxImageHistogram &h ) const
1848 {
1849     unsigned char *p = GetData();
1850     unsigned long nentries = 0;
1851
1852     h.clear();
1853
1854     const unsigned long size = GetWidth() * GetHeight();
1855
1856     unsigned char r, g, b;
1857     for ( unsigned long n = 0; n < size; n++ )
1858     {
1859         r = *p++;
1860         g = *p++;
1861         b = *p++;
1862
1863         wxImageHistogramEntry& entry = h[wxImageHistogram::MakeKey(r, g, b)];
1864
1865         if ( entry.value++ == 0 )
1866             entry.index = nentries++;
1867     }
1868
1869     return nentries;
1870 }
1871
1872 /*
1873  * Rotation code by Carlos Moreno
1874  */
1875
1876 // GRG: I've removed wxRotationPoint - we already have wxRealPoint which
1877 //      does exactly the same thing. And I also got rid of wxRotationPixel
1878 //      bacause of potential problems in architectures where alignment
1879 //      is an issue, so I had to rewrite parts of the code.
1880
1881 static const double gs_Epsilon = 1e-10;
1882
1883 static inline int wxCint (double x)
1884 {
1885     return (x > 0) ? (int) (x + 0.5) : (int) (x - 0.5);
1886 }
1887
1888
1889 // Auxiliary function to rotate a point (x,y) with respect to point p0
1890 // make it inline and use a straight return to facilitate optimization
1891 // also, the function receives the sine and cosine of the angle to avoid
1892 // repeating the time-consuming calls to these functions -- sin/cos can
1893 // be computed and stored in the calling function.
1894
1895 inline wxRealPoint rotated_point (const wxRealPoint & p, double cos_angle, double sin_angle, const wxRealPoint & p0)
1896 {
1897     return wxRealPoint (p0.x + (p.x - p0.x) * cos_angle - (p.y - p0.y) * sin_angle,
1898                         p0.y + (p.y - p0.y) * cos_angle + (p.x - p0.x) * sin_angle);
1899 }
1900
1901 inline wxRealPoint rotated_point (double x, double y, double cos_angle, double sin_angle, const wxRealPoint & p0)
1902 {
1903     return rotated_point (wxRealPoint(x,y), cos_angle, sin_angle, p0);
1904 }
1905
1906 wxImage wxImage::Rotate(double angle, const wxPoint & centre_of_rotation, bool interpolating, wxPoint * offset_after_rotation) const
1907 {
1908     int i;
1909     angle = -angle;     // screen coordinates are a mirror image of "real" coordinates
1910
1911     bool has_alpha = HasAlpha();
1912
1913     // Create pointer-based array to accelerate access to wxImage's data
1914     unsigned char ** data = new unsigned char * [GetHeight()];
1915     data[0] = GetData();
1916     for (i = 1; i < GetHeight(); i++)
1917         data[i] = data[i - 1] + (3 * GetWidth());
1918
1919     // Same for alpha channel
1920     unsigned char ** alpha = NULL;
1921     if (has_alpha)
1922     {
1923         alpha = new unsigned char * [GetHeight()];
1924         alpha[0] = GetAlpha();
1925         for (i = 1; i < GetHeight(); i++)
1926             alpha[i] = alpha[i - 1] + GetWidth();
1927     }
1928
1929     // precompute coefficients for rotation formula
1930     // (sine and cosine of the angle)
1931     const double cos_angle = cos(angle);
1932     const double sin_angle = sin(angle);
1933
1934     // Create new Image to store the result
1935     // First, find rectangle that covers the rotated image;  to do that,
1936     // rotate the four corners
1937
1938     const wxRealPoint p0(centre_of_rotation.x, centre_of_rotation.y);
1939
1940     wxRealPoint p1 = rotated_point (0, 0, cos_angle, sin_angle, p0);
1941     wxRealPoint p2 = rotated_point (0, GetHeight(), cos_angle, sin_angle, p0);
1942     wxRealPoint p3 = rotated_point (GetWidth(), 0, cos_angle, sin_angle, p0);
1943     wxRealPoint p4 = rotated_point (GetWidth(), GetHeight(), cos_angle, sin_angle, p0);
1944
1945     int x1 = (int) floor (wxMin (wxMin(p1.x, p2.x), wxMin(p3.x, p4.x)));
1946     int y1 = (int) floor (wxMin (wxMin(p1.y, p2.y), wxMin(p3.y, p4.y)));
1947     int x2 = (int) ceil (wxMax (wxMax(p1.x, p2.x), wxMax(p3.x, p4.x)));
1948     int y2 = (int) ceil (wxMax (wxMax(p1.y, p2.y), wxMax(p3.y, p4.y)));
1949
1950     // Create rotated image
1951     wxImage rotated (x2 - x1 + 1, y2 - y1 + 1, false);
1952     // With alpha channel
1953     if (has_alpha)
1954         rotated.SetAlpha();
1955
1956     if (offset_after_rotation != NULL)
1957     {
1958         *offset_after_rotation = wxPoint (x1, y1);
1959     }
1960
1961     // GRG: The rotated (destination) image is always accessed
1962     //      sequentially, so there is no need for a pointer-based
1963     //      array here (and in fact it would be slower).
1964     //
1965     unsigned char * dst = rotated.GetData();
1966
1967     unsigned char * alpha_dst = NULL;
1968     if (has_alpha)
1969         alpha_dst = rotated.GetAlpha();
1970
1971     // GRG: if the original image has a mask, use its RGB values
1972     //      as the blank pixel, else, fall back to default (black).
1973     //
1974     unsigned char blank_r = 0;
1975     unsigned char blank_g = 0;
1976     unsigned char blank_b = 0;
1977
1978     if (HasMask())
1979     {
1980         blank_r = GetMaskRed();
1981         blank_g = GetMaskGreen();
1982         blank_b = GetMaskBlue();
1983         rotated.SetMaskColour( blank_r, blank_g, blank_b );
1984     }
1985
1986     // Now, for each point of the rotated image, find where it came from, by
1987     // performing an inverse rotation (a rotation of -angle) and getting the
1988     // pixel at those coordinates
1989
1990     // GRG: I've taken the (interpolating) test out of the loops, so that
1991     //      it is done only once, instead of repeating it for each pixel.
1992
1993     int x;
1994     if (interpolating)
1995     {
1996         for (int y = 0; y < rotated.GetHeight(); y++)
1997         {
1998             for (x = 0; x < rotated.GetWidth(); x++)
1999             {
2000                 wxRealPoint src = rotated_point (x + x1, y + y1, cos_angle, -sin_angle, p0);
2001
2002                 if (-0.25 < src.x && src.x < GetWidth() - 0.75 &&
2003                     -0.25 < src.y && src.y < GetHeight() - 0.75)
2004                 {
2005                     // interpolate using the 4 enclosing grid-points.  Those
2006                     // points can be obtained using floor and ceiling of the
2007                     // exact coordinates of the point
2008                         // C.M. 2000-02-17:  when the point is near the border, special care is required.
2009
2010                     int x1, y1, x2, y2;
2011
2012                     if (0 < src.x && src.x < GetWidth() - 1)
2013                     {
2014                         x1 = wxCint(floor(src.x));
2015                         x2 = wxCint(ceil(src.x));
2016                     }
2017                     else    // else means that x is near one of the borders (0 or width-1)
2018                     {
2019                         x1 = x2 = wxCint (src.x);
2020                     }
2021
2022                     if (0 < src.y && src.y < GetHeight() - 1)
2023                     {
2024                         y1 = wxCint(floor(src.y));
2025                         y2 = wxCint(ceil(src.y));
2026                     }
2027                     else
2028                     {
2029                         y1 = y2 = wxCint (src.y);
2030                     }
2031
2032                     // get four points and the distances (square of the distance,
2033                     // for efficiency reasons) for the interpolation formula
2034
2035                     // GRG: Do not calculate the points until they are
2036                     //      really needed -- this way we can calculate
2037                     //      just one, instead of four, if d1, d2, d3
2038                     //      or d4 are < gs_Epsilon
2039
2040                     const double d1 = (src.x - x1) * (src.x - x1) + (src.y - y1) * (src.y - y1);
2041                     const double d2 = (src.x - x2) * (src.x - x2) + (src.y - y1) * (src.y - y1);
2042                     const double d3 = (src.x - x2) * (src.x - x2) + (src.y - y2) * (src.y - y2);
2043                     const double d4 = (src.x - x1) * (src.x - x1) + (src.y - y2) * (src.y - y2);
2044
2045                     // Now interpolate as a weighted average of the four surrounding
2046                     // points, where the weights are the distances to each of those points
2047
2048                     // If the point is exactly at one point of the grid of the source
2049                     // image, then don't interpolate -- just assign the pixel
2050
2051                     if (d1 < gs_Epsilon)        // d1,d2,d3,d4 are positive -- no need for abs()
2052                     {
2053                         unsigned char *p = data[y1] + (3 * x1);
2054                         *(dst++) = *(p++);
2055                         *(dst++) = *(p++);
2056                         *(dst++) = *p;
2057
2058                         if (has_alpha)
2059                         {
2060                             unsigned char *p = alpha[y1] + x1;
2061                             *(alpha_dst++) = *p;
2062                         }
2063                     }
2064                     else if (d2 < gs_Epsilon)
2065                     {
2066                         unsigned char *p = data[y1] + (3 * x2);
2067                         *(dst++) = *(p++);
2068                         *(dst++) = *(p++);
2069                         *(dst++) = *p;
2070
2071                         if (has_alpha)
2072                         {
2073                             unsigned char *p = alpha[y1] + x2;
2074                             *(alpha_dst++) = *p;
2075                         }
2076                     }
2077                     else if (d3 < gs_Epsilon)
2078                     {
2079                         unsigned char *p = data[y2] + (3 * x2);
2080                         *(dst++) = *(p++);
2081                         *(dst++) = *(p++);
2082                         *(dst++) = *p;
2083
2084                         if (has_alpha)
2085                         {
2086                             unsigned char *p = alpha[y2] + x2;
2087                             *(alpha_dst++) = *p;
2088                         }
2089                     }
2090                     else if (d4 < gs_Epsilon)
2091                     {
2092                         unsigned char *p = data[y2] + (3 * x1);
2093                         *(dst++) = *(p++);
2094                         *(dst++) = *(p++);
2095                         *(dst++) = *p;
2096
2097                         if (has_alpha)
2098                         {
2099                             unsigned char *p = alpha[y2] + x1;
2100                             *(alpha_dst++) = *p;
2101                         }
2102                     }
2103                     else
2104                     {
2105                         // weights for the weighted average are proportional to the inverse of the distance
2106                         unsigned char *v1 = data[y1] + (3 * x1);
2107                         unsigned char *v2 = data[y1] + (3 * x2);
2108                         unsigned char *v3 = data[y2] + (3 * x2);
2109                         unsigned char *v4 = data[y2] + (3 * x1);
2110
2111                         const double w1 = 1/d1, w2 = 1/d2, w3 = 1/d3, w4 = 1/d4;
2112
2113                         // GRG: Unrolled.
2114
2115                         *(dst++) = (unsigned char)
2116                             ( (w1 * *(v1++) + w2 * *(v2++) +
2117                                w3 * *(v3++) + w4 * *(v4++)) /
2118                               (w1 + w2 + w3 + w4) );
2119                         *(dst++) = (unsigned char)
2120                             ( (w1 * *(v1++) + w2 * *(v2++) +
2121                                w3 * *(v3++) + w4 * *(v4++)) /
2122                               (w1 + w2 + w3 + w4) );
2123                         *(dst++) = (unsigned char)
2124                             ( (w1 * *v1 + w2 * *v2 +
2125                                w3 * *v3 + w4 * *v4) /
2126                               (w1 + w2 + w3 + w4) );
2127
2128                         if (has_alpha)
2129                         {
2130                             unsigned char *v1 = alpha[y1] + (x1);
2131                             unsigned char *v2 = alpha[y1] + (x2);
2132                             unsigned char *v3 = alpha[y2] + (x2);
2133                             unsigned char *v4 = alpha[y2] + (x1);
2134
2135                             *(alpha_dst++) = (unsigned char)
2136                                 ( (w1 * *v1 + w2 * *v2 +
2137                                    w3 * *v3 + w4 * *v4) /
2138                                   (w1 + w2 + w3 + w4) );
2139                         }
2140                     }
2141                 }
2142                 else
2143                 {
2144                     *(dst++) = blank_r;
2145                     *(dst++) = blank_g;
2146                     *(dst++) = blank_b;
2147
2148                     if (has_alpha)
2149                         *(alpha_dst++) = 0;
2150                 }
2151             }
2152         }
2153     }
2154     else    // not interpolating
2155     {
2156         for (int y = 0; y < rotated.GetHeight(); y++)
2157         {
2158             for (x = 0; x < rotated.GetWidth(); x++)
2159             {
2160                 wxRealPoint src = rotated_point (x + x1, y + y1, cos_angle, -sin_angle, p0);
2161
2162                 const int xs = wxCint (src.x);      // wxCint rounds to the
2163                 const int ys = wxCint (src.y);      // closest integer
2164
2165                 if (0 <= xs && xs < GetWidth() &&
2166                     0 <= ys && ys < GetHeight())
2167                 {
2168                     unsigned char *p = data[ys] + (3 * xs);
2169                     *(dst++) = *(p++);
2170                     *(dst++) = *(p++);
2171                     *(dst++) = *p;
2172
2173                     if (has_alpha)
2174                     {
2175                         unsigned char *p = alpha[ys] + (xs);
2176                         *(alpha_dst++) = *p;
2177                     }
2178                 }
2179                 else
2180                 {
2181                     *(dst++) = blank_r;
2182                     *(dst++) = blank_g;
2183                     *(dst++) = blank_b;
2184
2185                     if (has_alpha)
2186                         *(alpha_dst++) = 255;
2187                 }
2188             }
2189         }
2190     }
2191
2192     delete [] data;
2193
2194     if (has_alpha)
2195         delete [] alpha;
2196
2197     return rotated;
2198 }
2199
2200
2201
2202
2203
2204 // A module to allow wxImage initialization/cleanup
2205 // without calling these functions from app.cpp or from
2206 // the user's application.
2207
2208 class wxImageModule: public wxModule
2209 {
2210 DECLARE_DYNAMIC_CLASS(wxImageModule)
2211 public:
2212     wxImageModule() {}
2213     bool OnInit() { wxImage::InitStandardHandlers(); return true; };
2214     void OnExit() { wxImage::CleanUpHandlers(); };
2215 };
2216
2217 IMPLEMENT_DYNAMIC_CLASS(wxImageModule, wxModule)
2218
2219
2220 #endif // wxUSE_IMAGE