src/msw/gdiimage.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        msw/gdiimage.cpp
   3 // Purpose:     wxGDIImage implementation
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     20.11.99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1999 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 // Licence:     wxWindows license
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21     #pragma implementation "gdiimage.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/string.h"
  33 #endif // WX_PRECOMP
  34
  35 #include "wx/msw/private.h"
  36
  37 #include "wx/app.h"
  38
  39 #include "wx/msw/dib.h"
  40 #include "wx/msw/bitmap.h"
  41 #include "wx/msw/gdiimage.h"
  42 #include "wx/bitmap.h"
  43
  44 #if wxUSE_XPM_IN_MSW
  45 #   include "wx/xpmhand.h"
  46 #endif // wxUSE_XPM_IN_MSW
  47
  48 #ifdef __WIN16__
  49 #   include "wx/msw/curico.h"
  50 #endif // __WIN16__
  51
  52 // ----------------------------------------------------------------------------
  53 // private classes
  54 // ----------------------------------------------------------------------------
  55
  56 // all image handlers are declared/defined in this file because the outside
  57 // world doesn't have to know about them (but only about wxBITMAP_TYPE_XXX ids)
  58
  59 class WXDLLEXPORT wxBMPFileHandler : public wxBitmapHandler
  60 {
  61 public:
  62     wxBMPFileHandler() : wxBitmapHandler(_T("Windows bitmap file"), _T("bmp"),
  63                                          wxBITMAP_TYPE_BMP)
  64     {
  65     }
  66
  67     virtual bool LoadFile(wxBitmap *bitmap,
  68                           const wxString& name, long flags,
  69                           int desiredWidth, int desiredHeight);
  70     virtual bool SaveFile(wxBitmap *bitmap,
  71                           const wxString& name, int type,
  72                           const wxPalette *palette = NULL);
  73
  74 private:
  75     DECLARE_DYNAMIC_CLASS(wxBMPFileHandler)
  76 };
  77
  78 class WXDLLEXPORT wxBMPResourceHandler: public wxBitmapHandler
  79 {
  80 public:
  81     wxBMPResourceHandler() : wxBitmapHandler(_T("Windows bitmap resource"),
  82                                              wxEmptyString,
  83                                              wxBITMAP_TYPE_BMP_RESOURCE)
  84     {
  85     }
  86
  87     virtual bool LoadFile(wxBitmap *bitmap,
  88                           const wxString& name, long flags,
  89                           int desiredWidth, int desiredHeight);
  90
  91 private:
  92     DECLARE_DYNAMIC_CLASS(wxBMPResourceHandler)
  93 };
  94
  95 class WXDLLEXPORT wxIconHandler : public wxGDIImageHandler
  96 {
  97 public:
  98     wxIconHandler(const wxString& name, const wxString& ext, long type)
  99         : wxGDIImageHandler(name, ext, type)
 100     {
 101     }
 102
 103     // creating and saving icons is not supported
 104     virtual bool Create(wxGDIImage *WXUNUSED(image),
 105                         void *WXUNUSED(data),
 106                         long WXUNUSED(flags),
 107                         int WXUNUSED(width),
 108                         int WXUNUSED(height),
 109                         int WXUNUSED(depth) = 1)
 110     {
 111         return FALSE;
 112     }
 113
 114     virtual bool Save(wxGDIImage *WXUNUSED(image),
 115                       const wxString& WXUNUSED(name),
 116                       int WXUNUSED(type))
 117     {
 118         return FALSE;
 119     }
 120
 121     virtual bool Load(wxGDIImage *image,
 122                       const wxString& name,
 123                       long flags,
 124                       int desiredWidth, int desiredHeight)
 125     {
 126         wxIcon *icon = wxDynamicCast(image, wxIcon);
 127         wxCHECK_MSG( icon, FALSE, _T("wxIconHandler only works with icons") );
 128
 129         return LoadIcon(icon, name, flags, desiredWidth, desiredHeight);
 130     }
 131
 132 protected:
 133     virtual bool LoadIcon(wxIcon *icon,
 134                           const wxString& name, long flags,
 135                           int desiredWidth = -1, int desiredHeight = -1) = 0;
 136 };
 137
 138 class WXDLLEXPORT wxICOFileHandler : public wxIconHandler
 139 {
 140 public:
 141     wxICOFileHandler() : wxIconHandler(_T("ICO icon file"),
 142                                        _T("ico"),
 143                                        wxBITMAP_TYPE_ICO)
 144     {
 145     }
 146
 147     virtual bool LoadIcon(wxIcon *icon,
 148                           const wxString& name, long flags,
 149                           int desiredWidth = -1, int desiredHeight = -1);
 150
 151 private:
 152     DECLARE_DYNAMIC_CLASS(wxICOFileHandler)
 153 };
 154
 155 class WXDLLEXPORT wxICOResourceHandler: public wxIconHandler
 156 {
 157 public:
 158     wxICOResourceHandler() : wxIconHandler(_T("ICO resource"),
 159                                            _T("ico"),
 160                                            wxBITMAP_TYPE_ICO_RESOURCE)
 161     {
 162     }
 163
 164     virtual bool LoadIcon(wxIcon *icon,
 165                           const wxString& name, long flags,
 166                           int desiredWidth = -1, int desiredHeight = -1);
 167
 168 private:
 169     DECLARE_DYNAMIC_CLASS(wxICOResourceHandler)
 170 };
 171
 172 // ----------------------------------------------------------------------------
 173 // wxWin macros
 174 // ----------------------------------------------------------------------------
 175
 176     IMPLEMENT_DYNAMIC_CLASS(wxBMPFileHandler, wxBitmapHandler)
 177     IMPLEMENT_DYNAMIC_CLASS(wxBMPResourceHandler, wxBitmapHandler)
 178     IMPLEMENT_DYNAMIC_CLASS(wxICOFileHandler, wxGDIImageHandler)
 179     IMPLEMENT_DYNAMIC_CLASS(wxICOResourceHandler, wxGDIImageHandler)
 180
 181 // ----------------------------------------------------------------------------
 182 // private functions
 183 // ----------------------------------------------------------------------------
 184
 185 static wxSize GetHiconSize(HICON hicon);
 186
 187 // ============================================================================
 188 // implementation
 189 // ============================================================================
 190
 191 wxList wxGDIImage::ms_handlers;
 192
 193 // ----------------------------------------------------------------------------
 194 // wxGDIImage functions forwarded to wxGDIImageRefData
 195 // ----------------------------------------------------------------------------
 196
 197 bool wxGDIImage::FreeResource(bool WXUNUSED(force))
 198 {
 199     if ( !IsNull() )
 200     {
 201         GetGDIImageData()->Free();
 202         GetGDIImageData()->m_handle = 0;
 203     }
 204
 205     return TRUE;
 206 }
 207
 208 WXHANDLE wxGDIImage::GetResourceHandle()
 209 {
 210     return GetHandle();
 211 }
 212
 213 // ----------------------------------------------------------------------------
 214 // wxGDIImage handler stuff
 215 // ----------------------------------------------------------------------------
 216
 217 void wxGDIImage::AddHandler(wxGDIImageHandler *handler)
 218 {
 219     ms_handlers.Append(handler);
 220 }
 221
 222 void wxGDIImage::InsertHandler(wxGDIImageHandler *handler)
 223 {
 224     ms_handlers.Insert(handler);
 225 }
 226
 227 bool wxGDIImage::RemoveHandler(const wxString& name)
 228 {
 229     wxGDIImageHandler *handler = FindHandler(name);
 230     if ( handler )
 231     {
 232         ms_handlers.DeleteObject(handler);
 233         return TRUE;
 234     }
 235     else
 236         return FALSE;
 237 }
 238
 239 wxGDIImageHandler *wxGDIImage::FindHandler(const wxString& name)
 240 {
 241     wxNode *node = ms_handlers.First();
 242     while ( node )
 243     {
 244         wxGDIImageHandler *handler = (wxGDIImageHandler *)node->Data();
 245         if ( handler->GetName() == name )
 246             return handler;
 247         node = node->Next();
 248     }
 249
 250     return NULL;
 251 }
 252
 253 wxGDIImageHandler *wxGDIImage::FindHandler(const wxString& extension,
 254                                            long type)
 255 {
 256     wxNode *node = ms_handlers.First();
 257     while ( node )
 258     {
 259         wxGDIImageHandler *handler = (wxGDIImageHandler *)node->Data();
 260         if ( (handler->GetExtension() = extension) &&
 261              (type == -1 || handler->GetType() == type) )
 262         {
 263             return handler;
 264         }
 265
 266         node = node->Next();
 267     }
 268     return NULL;
 269 }
 270
 271 wxGDIImageHandler *wxGDIImage::FindHandler(long type)
 272 {
 273     wxNode *node = ms_handlers.First();
 274     while ( node )
 275     {
 276         wxGDIImageHandler *handler = (wxGDIImageHandler *)node->Data();
 277         if ( handler->GetType() == type )
 278             return handler;
 279
 280         node = node->Next();
 281     }
 282
 283     return NULL;
 284 }
 285
 286 void wxGDIImage::CleanUpHandlers()
 287 {
 288     wxNode *node = ms_handlers.First();
 289     while ( node )
 290     {
 291         wxGDIImageHandler *handler = (wxGDIImageHandler *)node->Data();
 292         wxNode *next = node->Next();
 293         delete handler;
 294         delete node;
 295         node = next;
 296     }
 297 }
 298
 299 void wxGDIImage::InitStandardHandlers()
 300 {
 301     AddHandler(new wxBMPResourceHandler);
 302     AddHandler(new wxBMPFileHandler);
 303
 304     // GRG: Add these handlers by default if XPM support is enabled
 305
 306 #if wxUSE_XPM_IN_MSW
 307     AddHandler(new wxXPMFileHandler);
 308     AddHandler(new wxXPMDataHandler);
 309 #endif // wxUSE_XPM_IN_MSW
 310
 311     AddHandler(new wxICOResourceHandler);
 312     AddHandler(new wxICOFileHandler);
 313 }
 314
 315 // ----------------------------------------------------------------------------
 316 // wxBitmap handlers
 317 // ----------------------------------------------------------------------------
 318
 319 bool wxBMPResourceHandler::LoadFile(wxBitmap *bitmap,
 320                                     const wxString& name, long WXUNUSED(flags),
 321                                     int WXUNUSED(desiredWidth),
 322                                     int WXUNUSED(desiredHeight))
 323 {
 324     // TODO: load colourmap.
 325     bitmap->SetHBITMAP((WXHBITMAP)::LoadBitmap(wxGetInstance(), name));
 326
 327     wxBitmapRefData *data = bitmap->GetBitmapData();
 328     if ( bitmap->Ok() )
 329     {
 330         BITMAP bm;
 331         if ( !::GetObject(GetHbitmapOf(*bitmap), sizeof(BITMAP), (LPSTR) &bm) )
 332         {
 333             wxLogLastError(wxT("GetObject(HBITMAP)"));
 334         }
 335
 336         data->m_width = bm.bmWidth;
 337         data->m_height = bm.bmHeight;
 338         data->m_depth = bm.bmBitsPixel;
 339     }
 340     else
 341     {
 342         // it's probably not found
 343         wxLogError(wxT("Can't load bitmap '%s' from resources! Check .rc file."),
 344                    name.c_str());
 345     }
 346
 347     return bitmap->Ok();
 348 }
 349
 350 bool wxBMPFileHandler::LoadFile(wxBitmap *bitmap,
 351                                 const wxString& name, long WXUNUSED(flags),
 352                                 int WXUNUSED(desiredWidth),
 353                                 int WXUNUSED(desiredHeight))
 354 {
 355 #if wxUSE_IMAGE_LOADING_IN_MSW
 356     wxPalette *palette = NULL;
 357     bool success = wxLoadIntoBitmap(WXSTRINGCAST name, bitmap, &palette) != 0;
 358     if ( success && palette )
 359     {
 360         bitmap->SetPalette(*palette);
 361     }
 362
 363     // it was copied by the bitmap if it was loaded successfully
 364     delete palette;
 365
 366     return success;
 367 #else
 368     return FALSE;
 369 #endif
 370 }
 371
 372 bool wxBMPFileHandler::SaveFile(wxBitmap *bitmap,
 373                                 const wxString& name,
 374                                 int WXUNUSED(type),
 375                                 const wxPalette *pal)
 376 {
 377 #if wxUSE_IMAGE_LOADING_IN_MSW
 378     wxPalette *actualPalette = (wxPalette *)pal;
 379     if ( !actualPalette )
 380         actualPalette = bitmap->GetPalette();
 381     return wxSaveBitmap(WXSTRINGCAST name, bitmap, actualPalette) != 0;
 382 #else
 383     return FALSE;
 384 #endif
 385 }
 386
 387 // ----------------------------------------------------------------------------
 388 // wxIcon handlers
 389 // ----------------------------------------------------------------------------
 390
 391 bool wxICOFileHandler::LoadIcon(wxIcon *icon,
 392                                 const wxString& name,
 393                                 long flags,
 394                                 int desiredWidth, int desiredHeight)
 395 {
 396 #if wxUSE_RESOURCE_LOADING_IN_MSW
 397     icon->UnRef();
 398
 399     // actual size
 400     wxSize size;
 401
 402 #ifdef __WIN32__
 403     HICON hicon = ::ExtractIcon(wxGetInstance(), name, 0 /* first */);
 404     if ( !hicon )
 405     {
 406         wxLogSysError(_T("Failed to load icon from the file '%s'"),
 407                       name.c_str());
 408
 409         return FALSE;
 410     }
 411
 412     size = GetHiconSize(hicon);
 413 #else // Win16
 414     HICON hicon = ReadIconFile((wxChar *)name.c_str(),
 415                                wxGetInstance(),
 416                                &size.x, &size.y);
 417 #endif // Win32/Win16
 418
 419     if ( (desiredWidth != -1 && desiredWidth != size.x) ||
 420          (desiredHeight != -1 && desiredHeight != size.y) )
 421     {
 422         wxLogDebug(_T("Returning FALSE from wxICOFileHandler::Load because of the size mismatch: actual (%d, %d), requested (%d, %d)"),
 423                       size.x, size.y,
 424                       desiredWidth, desiredHeight);
 425
 426         ::DestroyIcon(hicon);
 427
 428         return FALSE;
 429     }
 430
 431     icon->SetHICON((WXHICON)hicon);
 432     icon->SetSize(size.x, size.y);
 433
 434     return icon->Ok();
 435 #else
 436     return FALSE;
 437 #endif
 438 }
 439
 440 bool wxICOResourceHandler::LoadIcon(wxIcon *icon,
 441                                     const wxString& name,
 442                                     long flags,
 443                                     int desiredWidth, int desiredHeight)
 444 {
 445     HICON hicon;
 446
 447 #if defined(__WIN32__) && !defined(__SC__)
 448     if ( desiredWidth != -1 && desiredHeight != -1 )
 449     {
 450         hicon = (HICON)::LoadImage(wxGetInstance(), name, IMAGE_ICON,
 451                                     desiredWidth, desiredHeight,
 452                                     LR_DEFAULTCOLOR);
 453     }
 454     else
 455 #endif // Win32
 456     {
 457         hicon = ::LoadIcon(wxGetInstance(), name);
 458     }
 459
 460     wxSize size = GetHiconSize(hicon);
 461     icon->SetSize(size.x, size.y);
 462
 463     // Override the found values with desired values
 464     if ( desiredWidth > -1 && desiredHeight > -1 )
 465     {
 466         icon->SetSize(desiredWidth, desiredHeight);
 467     }
 468
 469     icon->SetHICON((WXHICON)hicon);
 470
 471     return icon->Ok();
 472 }
 473
 474 // ----------------------------------------------------------------------------
 475 // private functions
 476 // ----------------------------------------------------------------------------
 477
 478 static wxSize GetHiconSize(HICON hicon)
 479 {
 480     wxSize size(32, 32);    // default
 481
 482 #ifdef __WIN32__
 483     // Win32s doesn't have GetIconInfo function...
 484     if ( hicon && wxGetOsVersion() != wxWIN32S )
 485     {
 486         ICONINFO info;
 487         if ( !::GetIconInfo(hicon, &info) )
 488         {
 489             wxLogLastError(wxT("GetIconInfo"));
 490         }
 491         else
 492         {
 493             HBITMAP hbmp = info.hbmMask;
 494             if ( hbmp )
 495             {
 496                 BITMAP bm;
 497                 if ( ::GetObject(hbmp, sizeof(BITMAP), (LPSTR) &bm) )
 498                 {
 499                     size = wxSize(bm.bmWidth, bm.bmHeight);
 500                 }
 501
 502                 ::DeleteObject(info.hbmMask);
 503             }
 504             if ( info.hbmColor )
 505                 ::DeleteObject(info.hbmColor);
 506         }
 507     }
 508 #endif
 509
 510     return size;
 511 }