src/mgl/bitmap.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/mgl/bitmap.cpp
   3 // Author:      Vaclav Slavik
   4 // RCS-ID:      $Id$
   5 // Copyright:   (c) 2001-2002 SciTech Software, Inc. (www.scitechsoft.com)
   6 // Licence:     wxWindows licence
   7 /////////////////////////////////////////////////////////////////////////////
   8
   9 // For compilers that support precompilation, includes "wx.h".
  10 #include "wx/wxprec.h"
  11
  12 #ifdef __BORLANDC__
  13     #pragma hdrstop
  14 #endif
  15
  16 #include "wx/bitmap.h"
  17
  18 #ifndef WX_PRECOMP
  19     #include "wx/intl.h"
  20     #include "wx/log.h"
  21     #include "wx/utils.h"
  22     #include "wx/dcmemory.h"
  23     #include "wx/icon.h"
  24     #include "wx/image.h"
  25 #endif
  26
  27 #include "wx/filefn.h"
  28 #include "wx/xpmdecod.h"
  29
  30 #include "wx/mgl/private.h"
  31
  32 #include <mgraph.hpp>
  33
  34 //-----------------------------------------------------------------------------
  35 // MGL pixel formats:
  36 //-----------------------------------------------------------------------------
  37
  38 static pixel_format_t gs_pixel_format_15 =
  39     {0x1F,0x0A,3, 0x1F,0x05,3, 0x1F,0x00,3, 0x01,0x0F,7}; // 555 15bpp
  40
  41 static pixel_format_t gs_pixel_format_16 =
  42     {0x1F,0x0B,3, 0x3F,0x05,2, 0x1F,0x00,3, 0x00,0x00,0}; // 565 16bpp
  43
  44 static pixel_format_t gs_pixel_format_24 =
  45     {0xFF,0x10,0, 0xFF,0x08,0, 0xFF,0x00,0, 0x00,0x00,0}; // RGB 24bpp
  46
  47 static pixel_format_t gs_pixel_format_32 =
  48     {0xFF,0x18,0, 0xFF,0x10,0, 0xFF,0x08,0, 0xFF,0x00,0}; // RGBA 32bpp
  49
  50 static pixel_format_t gs_pixel_format_wxImage =
  51     {0xFF,0x00,0, 0xFF,0x08,0, 0xFF,0x10,0, 0x00,0x00,0}; // RGB 24bpp for wxImage
  52
  53 //-----------------------------------------------------------------------------
  54 // wxBitmap
  55 //-----------------------------------------------------------------------------
  56
  57 class wxBitmapRefData: public wxObjectRefData
  58 {
  59 public:
  60     wxBitmapRefData();
  61     virtual ~wxBitmapRefData();
  62
  63     virtual bool IsOk() const { return m_bitmap != NULL; }
  64
  65     int             m_width;
  66     int             m_height;
  67     int             m_bpp;
  68     wxPalette      *m_palette;
  69     wxMask         *m_mask;
  70     bitmap_t       *m_bitmap;
  71 };
  72
  73 wxBitmapRefData::wxBitmapRefData()
  74 {
  75     m_mask = NULL;
  76     m_width = 0;
  77     m_height = 0;
  78     m_bpp = 0;
  79     m_palette = NULL;
  80     m_bitmap = NULL;
  81 }
  82
  83 wxBitmapRefData::~wxBitmapRefData()
  84 {
  85     if ( m_bitmap )
  86         MGL_unloadBitmap(m_bitmap);
  87     delete m_mask;
  88     delete m_palette;
  89 }
  90
  91 //-----------------------------------------------------------------------------
  92
  93 #define M_BMPDATA ((wxBitmapRefData *)m_refData)
  94
  95 IMPLEMENT_DYNAMIC_CLASS(wxBitmap,wxBitmapBase)
  96
  97 wxBitmap::wxBitmap(int width, int height, int depth)
  98 {
  99     Create(width, height, depth);
 100 }
 101
 102
 103 static bitmap_t *MyMGL_createBitmap(int width, int height,
 104                                     int bpp, pixel_format_t *pf)
 105 {
 106     MGLMemoryDC mdc(width, height, bpp, pf);
 107     return MGL_getBitmapFromDC(mdc.getDC(), 0, 0, width, height, TRUE);
 108 }
 109
 110 bool wxBitmap::Create(int width, int height, int depth)
 111 {
 112     UnRef();
 113
 114     wxCHECK_MSG( (width > 0) && (height > 0), false, wxT("invalid bitmap size") );
 115
 116     pixel_format_t pf_dummy;
 117     pixel_format_t *pf;
 118     int mglDepth = depth;
 119
 120     switch ( depth )
 121     {
 122         case -1:
 123             wxASSERT_MSG( g_displayDC, wxT("MGL display DC not created yet.") );
 124
 125             g_displayDC->getPixelFormat(pf_dummy);
 126             mglDepth = g_displayDC->getBitsPerPixel();
 127             pf = &pf_dummy;
 128             break;
 129         case 1:
 130         case 8:
 131             pf = NULL;
 132             break;
 133         case 15:
 134             pf = &gs_pixel_format_15;
 135             break;
 136         case 16:
 137             pf = &gs_pixel_format_16;
 138             break;
 139         case 24:
 140             pf = &gs_pixel_format_24;
 141             break;
 142         case 32:
 143             pf = &gs_pixel_format_32;
 144             break;
 145         default:
 146             wxFAIL_MSG(wxT("invalid bitmap depth"));
 147             return false;
 148     }
 149
 150     m_refData = new wxBitmapRefData();
 151     M_BMPDATA->m_mask = (wxMask *) NULL;
 152     M_BMPDATA->m_palette = (wxPalette *) NULL;
 153     M_BMPDATA->m_width = width;
 154     M_BMPDATA->m_height = height;
 155     M_BMPDATA->m_bpp = mglDepth;
 156
 157     if ( mglDepth != 1 )
 158     {
 159         M_BMPDATA->m_bitmap = MyMGL_createBitmap(width, height, mglDepth, pf);
 160     }
 161     else
 162     {
 163         // MGL does not support mono DCs, so we have to emulate them with
 164         // 8bpp ones. We do that by using a special palette with color 0
 165         // set to black and all other colors set to white.
 166
 167         M_BMPDATA->m_bitmap = MyMGL_createBitmap(width, height, 8, pf);
 168         SetMonoPalette(wxColour(255, 255, 255), wxColour(0, 0, 0));
 169     }
 170
 171     return Ok();
 172 }
 173
 174 wxBitmap::wxBitmap(const wxImage& image, int depth)
 175 {
 176     long width, height;
 177
 178     wxCHECK_RET( image.Ok(), wxT("invalid image") );
 179
 180     width = image.GetWidth();
 181     height = image.GetHeight();
 182
 183     if ( !Create(width, height, depth) ) return;
 184
 185     MGLMemoryDC idc(width, height, 24, &gs_pixel_format_wxImage,
 186                     width * 3, (void*)image.GetData(), NULL);
 187     wxASSERT_MSG( idc.isValid(), wxT("cannot create custom MGLDC") );
 188
 189     MGLDevCtx *bdc = CreateTmpDC();
 190
 191     if ( GetDepth() <= 8 && image.HasPalette() )
 192         SetPalette(image.GetPalette());
 193
 194     bdc->bitBlt(idc, 0, 0, width, height, 0, 0, MGL_REPLACE_MODE);
 195     delete bdc;
 196
 197     if ( image.HasMask() )
 198     {
 199         wxImage mask_image = image.ConvertToMono(image.GetMaskRed(),
 200                                                  image.GetMaskGreen(),
 201                                                  image.GetMaskBlue());
 202         mask_image.SetMask(false);
 203         wxBitmap mask_bmp(mask_image, 1);
 204         SetMask(new wxMask(mask_bmp));
 205     }
 206 }
 207
 208 wxImage wxBitmap::ConvertToImage() const
 209 {
 210     wxCHECK_MSG( Ok(), wxImage(), wxT("invalid bitmap") );
 211
 212     int width, height;
 213     width = GetWidth();
 214     height = GetHeight();
 215
 216     wxImage image(width, height);
 217     wxASSERT_MSG( image.Ok(), wxT("cannot create image") );
 218
 219     MGLMemoryDC idc(width, height, 24, &gs_pixel_format_wxImage,
 220                     width * 3, (void*)image.GetData(), NULL);
 221     wxASSERT_MSG( idc.isValid(), wxT("cannot create custom MGLDC") );
 222
 223     if ( M_BMPDATA->m_palette )
 224         image.SetPalette(*(M_BMPDATA->m_palette));
 225
 226     if ( GetMask() )
 227     {
 228         // in consistency with other ports, we convert parts covered
 229         // by the mask to <16,16,16> colour and set that colour to image's
 230         // mask. We do that by OR-blitting the mask over image with
 231         // bg colour set to black and fg colour to <16,16,16>
 232
 233         image.SetMaskColour(16, 16, 16);
 234         image.SetMask(true);
 235
 236         wxDC tmpDC;
 237         tmpDC.SetMGLDC(&idc, false);
 238         tmpDC.SetBackground(wxBrush(wxColour(16,16,16), wxSOLID));
 239         tmpDC.Clear();
 240         tmpDC.DrawBitmap(*this, 0, 0, true);
 241     }
 242     else
 243     {
 244         image.SetMask(false);
 245         idc.putBitmap(0, 0, M_BMPDATA->m_bitmap, MGL_REPLACE_MODE);
 246     }
 247
 248     return image;
 249 }
 250
 251 wxBitmap::wxBitmap(const wxString &filename, wxBitmapType type)
 252 {
 253     LoadFile(filename, type);
 254 }
 255
 256 wxBitmap::wxBitmap(const char bits[], int width, int height, int depth)
 257 {
 258     wxCHECK_RET( depth == 1, wxT("can only create mono bitmap from XBM data") );
 259
 260     if ( !Create(width, height, 1) ) return;
 261     MGLDevCtx *bdc = CreateTmpDC();
 262     wxCurrentDCSwitcher curDC(bdc);
 263     bdc->setColor(1);
 264     bdc->setBackColor(0);
 265     bdc->clearDevice();
 266     bdc->putMonoImage(0, 0, width, (width + 7) / 8, height, (void*)bits);
 267     delete bdc;
 268 }
 269
 270 int wxBitmap::GetHeight() const
 271 {
 272     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
 273
 274     return M_BMPDATA->m_height;
 275 }
 276
 277 int wxBitmap::GetWidth() const
 278 {
 279     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
 280
 281     return M_BMPDATA->m_width;
 282 }
 283
 284 int wxBitmap::GetDepth() const
 285 {
 286     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
 287
 288     return M_BMPDATA->m_bpp;
 289 }
 290
 291 wxMask *wxBitmap::GetMask() const
 292 {
 293     wxCHECK_MSG( Ok(), (wxMask *) NULL, wxT("invalid bitmap") );
 294
 295     return M_BMPDATA->m_mask;
 296 }
 297
 298 void wxBitmap::SetMask(wxMask *mask)
 299 {
 300     wxCHECK_RET( Ok(), wxT("invalid bitmap") );
 301
 302     AllocExclusive();
 303     delete M_BMPDATA->m_mask;
 304     M_BMPDATA->m_mask = mask;
 305 }
 306
 307 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
 308 {
 309     wxBitmap *bmp = (wxBitmap*)(&icon);
 310     *this = *bmp;
 311     return true;
 312 }
 313
 314 wxBitmap wxBitmap::GetSubBitmap(const wxRect& rect) const
 315 {
 316     wxCHECK_MSG( Ok() &&
 317                  (rect.x >= 0) && (rect.y >= 0) &&
 318                  (rect.x+rect.width <= M_BMPDATA->m_width) && (rect.y+rect.height <= M_BMPDATA->m_height),
 319                  wxNullBitmap, wxT("invalid bitmap or bitmap region") );
 320
 321     wxBitmap ret( rect.width, rect.height, M_BMPDATA->m_bpp );
 322     wxASSERT_MSG( ret.Ok(), wxT("GetSubBitmap error") );
 323
 324     if ( GetPalette() )
 325         ret.SetPalette(*GetPalette());
 326
 327     MGLDevCtx *tdc = ret.CreateTmpDC();
 328     tdc->putBitmapSection(rect.x, rect.y,
 329                           rect.x + rect.width, rect.y + rect.height,
 330                           0, 0, M_BMPDATA->m_bitmap, MGL_REPLACE_MODE);
 331     delete tdc;
 332
 333     if ( GetMask() )
 334     {
 335         wxBitmap submask = GetMask()->GetBitmap().GetSubBitmap(rect);
 336         ret.SetMask(new wxMask(submask));
 337     }
 338
 339     return ret;
 340 }
 341
 342 void wxBitmap::SetMonoPalette(const wxColour& fg, const wxColour& bg)
 343 {
 344     wxCHECK_RET( Ok(), wxT("invalid bitmap") );
 345
 346     AllocExclusive();
 347     palette_t *mono = M_BMPDATA->m_bitmap->pal;
 348
 349     wxCHECK_RET( M_BMPDATA->m_bpp == 1, wxT("bitmap is not 1bpp") );
 350     wxCHECK_RET( mono != NULL, wxT("bitmap w/o palette") );
 351
 352     mono[0].red = bg.Red();
 353     mono[0].green = bg.Green();
 354     mono[0].blue = bg.Blue();
 355     mono[0].alpha = 0;
 356     for (size_t i = 1; i < 256; i++)
 357     {
 358         mono[i].red = fg.Red();
 359         mono[i].green = fg.Green();
 360         mono[i].blue = fg.Blue();
 361         mono[i].alpha = 0;
 362     }
 363 }
 364
 365 MGLDevCtx *wxBitmap::CreateTmpDC() const
 366 {
 367     wxCHECK_MSG( Ok(), NULL, wxT("invalid bitmap") );
 368
 369     MGLDevCtx *tdc = new MGLMemoryDC(GetWidth(), GetHeight(),
 370                                      M_BMPDATA->m_bitmap->bitsPerPixel,
 371                                      M_BMPDATA->m_bitmap->pf,
 372                                      M_BMPDATA->m_bitmap->bytesPerLine,
 373                                      M_BMPDATA->m_bitmap->surface,
 374                                      NULL);
 375     wxCHECK_MSG( tdc->isValid(), NULL, wxT("cannot create temporary MGLDC") );
 376
 377     if ( M_BMPDATA->m_bitmap->pal != NULL )
 378     {
 379         int cnt;
 380
 381         switch (M_BMPDATA->m_bitmap->bitsPerPixel)
 382         {
 383             case  2: cnt = 2;   break;
 384             case  4: cnt = 16;  break;
 385             case  8: cnt = 256; break;
 386             default:
 387                 cnt = 0;
 388                 wxFAIL_MSG( wxT("bitmap with this depth cannot have palette") );
 389                 break;
 390         }
 391
 392         tdc->setPalette(M_BMPDATA->m_bitmap->pal, cnt, 0);
 393         tdc->realizePalette(cnt, 0, FALSE);
 394     }
 395
 396     return tdc;
 397 }
 398
 399 bool wxBitmap::LoadFile(const wxString &name, wxBitmapType type)
 400 {
 401     UnRef();
 402
 403     if ( type == wxBITMAP_TYPE_BMP || type == wxBITMAP_TYPE_PNG ||
 404          type == wxBITMAP_TYPE_PCX || type == wxBITMAP_TYPE_JPEG )
 405     {
 406         // prevent accidental loading of bitmap from $MGL_ROOT:
 407         if ( !wxFileExists(name) )
 408         {
 409             wxLogError(_("File %s does not exist."), name.c_str());
 410             return false;
 411         }
 412     }
 413
 414     wxBitmapHandler *handler = FindHandler(type);
 415
 416     if ( handler == NULL )
 417     {
 418         wxImage image;
 419         if ( !image.LoadFile(name, type) || !image.Ok() )
 420         {
 421             wxLogError("no bitmap handler for type %d defined.", type);
 422             return false;
 423         }
 424         else
 425         {
 426             *this = wxBitmap(image);
 427             return true;
 428         }
 429     }
 430
 431     m_refData = new wxBitmapRefData();
 432
 433     return handler->LoadFile(this, name, type, -1, -1);
 434 }
 435
 436 bool wxBitmap::SaveFile(const wxString& filename, wxBitmapType type, const wxPalette *palette) const
 437 {
 438     wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
 439
 440     wxBitmapHandler *handler = FindHandler(type);
 441
 442     if ( handler == NULL )
 443     {
 444         wxImage image = ConvertToImage();
 445         if ( palette )
 446             image.SetPalette(*palette);
 447
 448         if ( image.Ok() )
 449             return image.SaveFile(filename, type);
 450         else
 451         {
 452             wxLogError("no bitmap handler for type %d defined.", type);
 453             return false;
 454         }
 455     }
 456
 457     return handler->SaveFile(this, filename, type, palette);
 458 }
 459
 460 wxPalette *wxBitmap::GetPalette() const
 461 {
 462     wxCHECK_MSG( Ok(), NULL, wxT("invalid bitmap") );
 463
 464     return M_BMPDATA->m_palette;
 465 }
 466
 467 void wxBitmap::SetPalette(const wxPalette& palette)
 468 {
 469     wxCHECK_RET( Ok(), wxT("invalid bitmap") );
 470     wxCHECK_RET( GetDepth() > 1 && GetDepth() <= 8, wxT("cannot set palette for bitmap of this depth") );
 471
 472     AllocExclusive();
 473     delete M_BMPDATA->m_palette;
 474     M_BMPDATA->m_palette = NULL;
 475
 476     if ( !palette.Ok() ) return;
 477
 478     M_BMPDATA->m_palette = new wxPalette(palette);
 479
 480     int cnt = palette.GetColoursCount();
 481     palette_t *pal = palette.GetMGLpalette_t();
 482     memcpy(M_BMPDATA->m_bitmap->pal, pal, cnt * sizeof(palette_t));
 483 }
 484
 485 void wxBitmap::SetHeight(int height)
 486 {
 487     AllocExclusive();
 488
 489     M_BMPDATA->m_height = height;
 490 }
 491
 492 void wxBitmap::SetWidth(int width)
 493 {
 494     AllocExclusive();
 495
 496     M_BMPDATA->m_width = width;
 497 }
 498
 499 void wxBitmap::SetDepth(int depth)
 500 {
 501     AllocExclusive();
 502
 503     M_BMPDATA->m_bpp = depth;
 504 }
 505
 506 bitmap_t *wxBitmap::GetMGLbitmap_t() const
 507 {
 508     return M_BMPDATA->m_bitmap;
 509 }
 510
 511 // Convert wxColour into it's quantized value in lower-precision
 512 // pixel format (needed for masking by colour).
 513 wxColour wxBitmap::QuantizeColour(const wxColour& clr) const
 514 {
 515     pixel_format_t *pf = GetMGLbitmap_t()->pf;
 516
 517     if ( pf->redAdjust == 0 && pf->greenAdjust == 0 && pf->blueAdjust == 0 )
 518         return clr;
 519     else
 520         return wxColour((unsigned char)((clr.Red() >> pf->redAdjust) << pf->redAdjust),
 521                         (unsigned char)((clr.Green() >> pf->greenAdjust) << pf->greenAdjust),
 522                         (unsigned char)((clr.Blue() >> pf->blueAdjust) << pf->blueAdjust));
 523 }
 524
 525
 526 //-----------------------------------------------------------------------------
 527 // wxBitmap I/O handlers
 528 //-----------------------------------------------------------------------------
 529
 530 class wxMGLBitmapHandler: public wxBitmapHandler
 531 {
 532 public:
 533     wxMGLBitmapHandler(wxBitmapType type,
 534                        const wxString& extension, const wxString& name);
 535
 536     virtual bool Create(wxBitmap *WXUNUSED(bitmap),
 537                         const void* WXUNUSED(data),
 538                         long WXUNUSED(flags),
 539                         int WXUNUSED(width),
 540                         int WXUNUSED(height),
 541                         int WXUNUSED(depth) = 1)
 542         { return false; }
 543
 544     virtual bool LoadFile(wxBitmap *bitmap, const wxString& name, long flags,
 545                           int desiredWidth, int desiredHeight);
 546     virtual bool SaveFile(const wxBitmap *bitmap, const wxString& name,
 547                           int type, const wxPalette *palette = NULL);
 548 };
 549
 550 wxMGLBitmapHandler::wxMGLBitmapHandler(wxBitmapType type,
 551                                        const wxString& extension,
 552                                        const wxString& name)
 553    : wxBitmapHandler()
 554 {
 555     SetType(type);
 556     SetName(name);
 557     SetExtension(extension);
 558 }
 559
 560 bool wxMGLBitmapHandler::LoadFile(wxBitmap *bitmap, const wxString& name,
 561                                   long flags,
 562                                   int WXUNUSED(desiredWidth),
 563                                   int WXUNUSED(desiredHeight))
 564 {
 565     int width, height, bpp;
 566     pixel_format_t pf;
 567     wxString fullname;
 568     wxMemoryDC dc;
 569
 570     switch (flags)
 571     {
 572         case wxBITMAP_TYPE_BMP_RESOURCE:
 573         case wxBITMAP_TYPE_JPEG_RESOURCE:
 574         case wxBITMAP_TYPE_PNG_RESOURCE:
 575         case wxBITMAP_TYPE_PCX_RESOURCE:
 576             fullname = name + wxT(".bmp");
 577             break;
 578         default:
 579             fullname= name;
 580             break;
 581     }
 582
 583     switch (flags)
 584     {
 585         case wxBITMAP_TYPE_BMP:
 586         case wxBITMAP_TYPE_BMP_RESOURCE:
 587             if ( !MGL_getBitmapSize(fullname.mb_str(), &width, &height, &bpp, &pf) )
 588                 return false;
 589             bitmap->Create(width, height, -1);
 590             if ( !bitmap->Ok() ) return false;
 591             dc.SelectObject(*bitmap);
 592             if ( !dc.GetMGLDC()->loadBitmapIntoDC(fullname.mb_str(), 0, 0, TRUE) )
 593                 return false;
 594             break;
 595
 596         case wxBITMAP_TYPE_JPEG:
 597         case wxBITMAP_TYPE_JPEG_RESOURCE:
 598             if ( !MGL_getJPEGSize(fullname.mb_str(), &width, &height, &bpp, &pf) )
 599                 return false;
 600             bitmap->Create(width, height, -1);
 601             if ( !bitmap->Ok() ) return false;
 602             dc.SelectObject(*bitmap);
 603             if ( !dc.GetMGLDC()->loadJPEGIntoDC(fullname.mb_str(), 0, 0, TRUE) )
 604                 return false;
 605             break;
 606
 607         case wxBITMAP_TYPE_PNG:
 608         case wxBITMAP_TYPE_PNG_RESOURCE:
 609             if ( !MGL_getPNGSize(fullname.mb_str(), &width, &height, &bpp, &pf) )
 610                 return false;
 611             bitmap->Create(width, height, -1);
 612             if ( !bitmap->Ok() ) return false;
 613             dc.SelectObject(*bitmap);
 614             if ( !dc.GetMGLDC()->loadPNGIntoDC(fullname.mb_str(), 0, 0, TRUE) )
 615                 return false;
 616             break;
 617
 618         case wxBITMAP_TYPE_PCX:
 619         case wxBITMAP_TYPE_PCX_RESOURCE:
 620             if ( !MGL_getPCXSize(fullname.mb_str(), &width, &height, &bpp) )
 621                 return false;
 622             bitmap->Create(width, height, -1);
 623             if ( !bitmap->Ok() ) return false;
 624             dc.SelectObject(*bitmap);
 625             if ( !dc.GetMGLDC()->loadPCXIntoDC(fullname.mb_str(), 0, 0, TRUE) )
 626                 return false;
 627             break;
 628
 629         default:
 630             wxFAIL_MSG(wxT("Unsupported image format."));
 631             break;
 632     }
 633
 634     return true;
 635 }
 636
 637 bool wxMGLBitmapHandler::SaveFile(const wxBitmap *bitmap, const wxString& name,
 638                                   int type, const wxPalette * WXUNUSED(palette))
 639 {
 640     wxMemoryDC mem;
 641     MGLDevCtx *tdc;
 642     int w = bitmap->GetWidth(),
 643         h = bitmap->GetHeight();
 644
 645     mem.SelectObjectAsSource(*bitmap);
 646     tdc = mem.GetMGLDC();
 647
 648     switch (type)
 649     {
 650         case wxBITMAP_TYPE_BMP:
 651             return (bool)tdc->saveBitmapFromDC(name.mb_str(), 0, 0, w, h);
 652         case wxBITMAP_TYPE_JPEG:
 653             return (bool)tdc->saveJPEGFromDC(name.mb_str(), 0, 0, w, h, 75);
 654         case wxBITMAP_TYPE_PNG:
 655             return (bool)tdc->savePNGFromDC(name.mb_str(), 0, 0, w, h);
 656         case wxBITMAP_TYPE_PCX:
 657             return (bool)tdc->savePCXFromDC(name.mb_str(), 0, 0, w, h);
 658     }
 659
 660     return false;
 661 }
 662
 663
 664
 665 // let's handle PNGs in special way because they have alpha channel
 666 // which we can access via bitmap_t most easily
 667 class wxPNGBitmapHandler: public wxMGLBitmapHandler
 668 {
 669 public:
 670     wxPNGBitmapHandler(wxBitmapType type,
 671                        const wxString& extension, const wxString& name)
 672         : wxMGLBitmapHandler(type, extension, name) {}
 673
 674     virtual bool LoadFile(wxBitmap *bitmap, const wxString& name, long flags,
 675                           int desiredWidth, int desiredHeight);
 676 };
 677
 678 bool wxPNGBitmapHandler::LoadFile(wxBitmap *bitmap, const wxString& name,
 679                                   long flags,
 680                                   int desiredWidth, int desiredHeight)
 681 {
 682     int width, height, bpp;
 683     pixel_format_t pf;
 684     wxString fullname;
 685
 686     if ( flags == wxBITMAP_TYPE_PNG_RESOURCE )
 687         fullname = name + wxT(".png");
 688     else
 689         fullname = name;
 690
 691     if ( !MGL_getPNGSize(fullname.mb_str(), &width, &height, &bpp, &pf) )
 692         return false;
 693
 694     if ( bpp != 32 )
 695     {
 696         // We can load ordinary PNGs faster with 'normal' MGL handler.
 697         // Only RGBA PNGs need to be processed in special way because
 698         // we have to convert alpha channel to mask
 699         return wxMGLBitmapHandler::LoadFile(bitmap, name, flags,
 700                                             desiredWidth, desiredHeight);
 701     }
 702
 703     bitmap_t *bmp = MGL_loadPNG(fullname.mb_str(), TRUE);
 704
 705     if ( bmp == NULL ) return false;
 706
 707     bitmap->Create(bmp->width, bmp->height, -1);
 708     if ( !bitmap->Ok() ) return false;
 709
 710     // convert bmp to display's depth and write it to *bitmap:
 711     wxMemoryDC dc;
 712     dc.SelectObject(*bitmap);
 713     dc.GetMGLDC()->putBitmap(0, 0, bmp, MGL_REPLACE_MODE);
 714     dc.SelectObject(wxNullBitmap);
 715
 716     // create mask, if bmp contains alpha channel (ARGB format):
 717     if ( bmp->bitsPerPixel == 32 )
 718     {
 719         int x, y;
 720         wxUint32 *s = (wxUint32*)bmp->surface;
 721         for (y = 0; y < bmp->height; y++)
 722         {
 723             s = ((wxUint32*)bmp->surface) + y * bmp->bytesPerLine/4;
 724             for (x = 0; x < bmp->width; x++, s ++)
 725             {
 726                 if ( ((((*s) >> bmp->pf->alphaPos) & bmp->pf->alphaMask)
 727                         << bmp->pf->alphaAdjust) < 128 )
 728                     *s = 0;
 729                 else
 730                     *s = 0x00FFFFFF; // white
 731             }
 732         }
 733         wxBitmap mask(bmp->width, bmp->height, 1);
 734         dc.SelectObject(mask);
 735         dc.GetMGLDC()->putBitmap(0, 0, bmp, MGL_REPLACE_MODE);
 736         dc.SelectObject(wxNullBitmap);
 737         bitmap->SetMask(new wxMask(mask));
 738     }
 739
 740     MGL_unloadBitmap(bmp);
 741
 742     return true;
 743 }
 744
 745
 746
 747
 748 class wxICOBitmapHandler: public wxBitmapHandler
 749 {
 750     public:
 751         wxICOBitmapHandler(wxBitmapType type,
 752                            const wxString& extension, const wxString& name);
 753
 754         virtual bool Create(wxBitmap *WXUNUSED(bitmap),
 755                             const void* WXUNUSED(data),
 756                             long WXUNUSED(flags),
 757                             int WXUNUSED(width),
 758                             int WXUNUSED(height),
 759                             int WXUNUSED(depth) = 1)
 760             { return false; }
 761
 762         virtual bool LoadFile(wxBitmap *bitmap, const wxString& name, long flags,
 763                               int desiredWidth, int desiredHeight);
 764         virtual bool SaveFile(const wxBitmap *bitmap, const wxString& name,
 765                               int type, const wxPalette *palette = NULL);
 766 };
 767
 768 wxICOBitmapHandler::wxICOBitmapHandler(wxBitmapType type,
 769                                        const wxString& extension,
 770                                        const wxString& name)
 771    : wxBitmapHandler()
 772 {
 773     SetType(type);
 774     SetName(name);
 775     SetExtension(extension);
 776 }
 777
 778 bool wxICOBitmapHandler::LoadFile(wxBitmap *bitmap, const wxString& name,
 779                                   long flags,
 780                                   int WXUNUSED(desiredWidth),
 781                                   int WXUNUSED(desiredHeight))
 782 {
 783     icon_t *icon = NULL;
 784     MGLDevCtx *dc;
 785
 786     if ( flags == wxBITMAP_TYPE_ICO_RESOURCE )
 787         icon = MGL_loadIcon(wxString(name + wxT(".ico")).mb_str(), TRUE);
 788     else
 789         icon = MGL_loadIcon(name.mb_str(), TRUE);
 790
 791     if ( icon == NULL ) return false;
 792
 793     bitmap->Create(icon->xorMask.width, icon->xorMask.height);
 794
 795     wxMemoryDC mem;
 796     mem.SelectObject(*bitmap);
 797     dc = mem.GetMGLDC();
 798     dc->putBitmap(0, 0, &(icon->xorMask), MGL_REPLACE_MODE);
 799     mem.SelectObject(wxNullBitmap);
 800
 801     wxBitmap mask(icon->xorMask.width, icon->xorMask.height, 1);
 802     mem.SelectObject(mask);
 803     dc = mem.GetMGLDC();
 804
 805     wxCurrentDCSwitcher curDC(dc);
 806     dc->setColor(0);
 807     dc->setBackColor(1);
 808     dc->clearDevice();
 809     dc->putMonoImage(0, 0, icon->xorMask.width, icon->byteWidth,
 810                            icon->xorMask.height, (void*)icon->andMask);
 811
 812     bitmap->SetMask(new wxMask(mask));
 813
 814     MGL_unloadIcon(icon);
 815
 816     return true;
 817 }
 818
 819 bool wxICOBitmapHandler::SaveFile(const wxBitmap *WXUNUSED(bitmap),
 820                                   const wxString& WXUNUSED(name),
 821                                   int WXUNUSED(type),
 822                                   const wxPalette * WXUNUSED(palette))
 823 {
 824     return false;
 825 }
 826
 827
 828
 829
 830 /*static*/ void wxBitmap::InitStandardHandlers()
 831 {
 832     AddHandler(new wxMGLBitmapHandler(wxBITMAP_TYPE_BMP, wxT("bmp"), wxT("Windows bitmap")));
 833     AddHandler(new wxMGLBitmapHandler(wxBITMAP_TYPE_BMP_RESOURCE, wxEmptyString, wxT("Windows bitmap resource")));
 834     AddHandler(new wxMGLBitmapHandler(wxBITMAP_TYPE_JPEG, wxT("jpg"), wxT("JPEG image")));
 835     AddHandler(new wxMGLBitmapHandler(wxBITMAP_TYPE_JPEG_RESOURCE, wxEmptyString, wxT("JPEG resource")));
 836     AddHandler(new wxMGLBitmapHandler(wxBITMAP_TYPE_PCX, wxT("pcx"), wxT("PCX image")));
 837     AddHandler(new wxMGLBitmapHandler(wxBITMAP_TYPE_PCX_RESOURCE, wxEmptyString, wxT("PCX resource")));
 838
 839     AddHandler(new wxPNGBitmapHandler(wxBITMAP_TYPE_PNG, wxT("png"), wxT("PNG image")));
 840     AddHandler(new wxPNGBitmapHandler(wxBITMAP_TYPE_PNG_RESOURCE, wxEmptyString, wxT("PNG resource")));
 841
 842     AddHandler(new wxICOBitmapHandler(wxBITMAP_TYPE_ICO, wxT("ico"), wxT("Icon resource")));
 843     AddHandler(new wxICOBitmapHandler(wxBITMAP_TYPE_ICO_RESOURCE, wxEmptyString, wxT("Icon resource")));
 844 }