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