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     #include "wx/log.h"
  34 #endif // WX_PRECOMP
  35
  36 #include "wx/msw/private.h"
  37
  38 #include "wx/app.h"
  39
  40 #ifndef __WXMICROWIN__
  41 #include "wx/msw/dib.h"
  42 #endif
  43
  44 #include "wx/msw/bitmap.h"
  45 #include "wx/msw/gdiimage.h"
  46 #include "wx/bitmap.h"
  47
  48 #ifdef __WIN16__
  49 #   include "wx/msw/curico.h"
  50 #endif // __WIN16__
  51
  52 // ----------------------------------------------------------------------------
  53 // private classes
  54 // ----------------------------------------------------------------------------
  55
  56 #ifndef __WXMICROWIN__
  57
  58 // all image handlers are declared/defined in this file because the outside
  59 // world doesn't have to know about them (but only about wxBITMAP_TYPE_XXX ids)
  60
  61 class WXDLLEXPORT wxBMPFileHandler : public wxBitmapHandler
  62 {
  63 public:
  64     wxBMPFileHandler() : wxBitmapHandler(_T("Windows bitmap file"), _T("bmp"),
  65                                          wxBITMAP_TYPE_BMP)
  66     {
  67     }
  68
  69     virtual bool LoadFile(wxBitmap *bitmap,
  70                           const wxString& name, long flags,
  71                           int desiredWidth, int desiredHeight);
  72     virtual bool SaveFile(wxBitmap *bitmap,
  73                           const wxString& name, int type,
  74                           const wxPalette *palette = NULL);
  75
  76 private:
  77     DECLARE_DYNAMIC_CLASS(wxBMPFileHandler)
  78 };
  79
  80 class WXDLLEXPORT wxBMPResourceHandler: public wxBitmapHandler
  81 {
  82 public:
  83     wxBMPResourceHandler() : wxBitmapHandler(_T("Windows bitmap resource"),
  84                                              wxEmptyString,
  85                                              wxBITMAP_TYPE_BMP_RESOURCE)
  86     {
  87     }
  88
  89     virtual bool LoadFile(wxBitmap *bitmap,
  90                           const wxString& name, long flags,
  91                           int desiredWidth, int desiredHeight);
  92
  93 private:
  94     DECLARE_DYNAMIC_CLASS(wxBMPResourceHandler)
  95 };
  96
  97 class WXDLLEXPORT wxIconHandler : public wxGDIImageHandler
  98 {
  99 public:
 100     wxIconHandler(const wxString& name, const wxString& ext, long type)
 101         : wxGDIImageHandler(name, ext, type)
 102     {
 103     }
 104
 105     // creating and saving icons is not supported
 106     virtual bool Create(wxGDIImage *WXUNUSED(image),
 107                         void *WXUNUSED(data),
 108                         long WXUNUSED(flags),
 109                         int WXUNUSED(width),
 110                         int WXUNUSED(height),
 111                         int WXUNUSED(depth) = 1)
 112     {
 113         return FALSE;
 114     }
 115
 116     virtual bool Save(wxGDIImage *WXUNUSED(image),
 117                       const wxString& WXUNUSED(name),
 118                       int WXUNUSED(type))
 119     {
 120         return FALSE;
 121     }
 122
 123     virtual bool Load(wxGDIImage *image,
 124                       const wxString& name,
 125                       long flags,
 126                       int desiredWidth, int desiredHeight)
 127     {
 128         wxIcon *icon = wxDynamicCast(image, wxIcon);
 129         wxCHECK_MSG( icon, FALSE, _T("wxIconHandler only works with icons") );
 130
 131         return LoadIcon(icon, name, flags, desiredWidth, desiredHeight);
 132     }
 133
 134 protected:
 135     virtual bool LoadIcon(wxIcon *icon,
 136                           const wxString& name, long flags,
 137                           int desiredWidth = -1, int desiredHeight = -1) = 0;
 138 };
 139
 140 class WXDLLEXPORT wxICOFileHandler : public wxIconHandler
 141 {
 142 public:
 143     wxICOFileHandler() : wxIconHandler(_T("ICO icon file"),
 144                                        _T("ico"),
 145                                        wxBITMAP_TYPE_ICO)
 146     {
 147     }
 148
 149     virtual bool LoadIcon(wxIcon *icon,
 150                           const wxString& name, long flags,
 151                           int desiredWidth = -1, int desiredHeight = -1);
 152
 153 private:
 154     DECLARE_DYNAMIC_CLASS(wxICOFileHandler)
 155 };
 156
 157 class WXDLLEXPORT wxICOResourceHandler: public wxIconHandler
 158 {
 159 public:
 160     wxICOResourceHandler() : wxIconHandler(_T("ICO resource"),
 161                                            _T("ico"),
 162                                            wxBITMAP_TYPE_ICO_RESOURCE)
 163     {
 164     }
 165
 166     virtual bool LoadIcon(wxIcon *icon,
 167                           const wxString& name, long flags,
 168                           int desiredWidth = -1, int desiredHeight = -1);
 169
 170 private:
 171     DECLARE_DYNAMIC_CLASS(wxICOResourceHandler)
 172 };
 173
 174 // ----------------------------------------------------------------------------
 175 // wxWin macros
 176 // ----------------------------------------------------------------------------
 177
 178 IMPLEMENT_DYNAMIC_CLASS(wxBMPFileHandler, wxBitmapHandler)
 179 IMPLEMENT_DYNAMIC_CLASS(wxBMPResourceHandler, wxBitmapHandler)
 180 IMPLEMENT_DYNAMIC_CLASS(wxICOFileHandler, wxObject)
 181 IMPLEMENT_DYNAMIC_CLASS(wxICOResourceHandler, wxObject)
 182
 183 // ----------------------------------------------------------------------------
 184 // private functions
 185 // ----------------------------------------------------------------------------
 186
 187 static wxSize GetHiconSize(HICON hicon);
 188 #endif
 189     // __MICROWIN__
 190
 191 // ============================================================================
 192 // implementation
 193 // ============================================================================
 194
 195 wxList wxGDIImage::ms_handlers;
 196
 197 // ----------------------------------------------------------------------------
 198 // wxGDIImage functions forwarded to wxGDIImageRefData
 199 // ----------------------------------------------------------------------------
 200
 201 bool wxGDIImage::FreeResource(bool WXUNUSED(force))
 202 {
 203     if ( !IsNull() )
 204     {
 205         GetGDIImageData()->Free();
 206         GetGDIImageData()->m_handle = 0;
 207     }
 208
 209     return TRUE;
 210 }
 211
 212 WXHANDLE wxGDIImage::GetResourceHandle()
 213 {
 214     return GetHandle();
 215 }
 216
 217 // ----------------------------------------------------------------------------
 218 // wxGDIImage handler stuff
 219 // ----------------------------------------------------------------------------
 220
 221 void wxGDIImage::AddHandler(wxGDIImageHandler *handler)
 222 {
 223     ms_handlers.Append(handler);
 224 }
 225
 226 void wxGDIImage::InsertHandler(wxGDIImageHandler *handler)
 227 {
 228     ms_handlers.Insert(handler);
 229 }
 230
 231 bool wxGDIImage::RemoveHandler(const wxString& name)
 232 {
 233     wxGDIImageHandler *handler = FindHandler(name);
 234     if ( handler )
 235     {
 236         ms_handlers.DeleteObject(handler);
 237         return TRUE;
 238     }
 239     else
 240         return FALSE;
 241 }
 242
 243 wxGDIImageHandler *wxGDIImage::FindHandler(const wxString& name)
 244 {
 245     wxNode *node = ms_handlers.First();
 246     while ( node )
 247     {
 248         wxGDIImageHandler *handler = (wxGDIImageHandler *)node->Data();
 249         if ( handler->GetName() == name )
 250             return handler;
 251         node = node->Next();
 252     }
 253
 254     return NULL;
 255 }
 256
 257 wxGDIImageHandler *wxGDIImage::FindHandler(const wxString& extension,
 258                                            long type)
 259 {
 260     wxNode *node = ms_handlers.First();
 261     while ( node )
 262     {
 263         wxGDIImageHandler *handler = (wxGDIImageHandler *)node->Data();
 264         if ( (handler->GetExtension() = extension) &&
 265              (type == -1 || handler->GetType() == type) )
 266         {
 267             return handler;
 268         }
 269
 270         node = node->Next();
 271     }
 272     return NULL;
 273 }
 274
 275 wxGDIImageHandler *wxGDIImage::FindHandler(long type)
 276 {
 277     wxNode *node = ms_handlers.First();
 278     while ( node )
 279     {
 280         wxGDIImageHandler *handler = (wxGDIImageHandler *)node->Data();
 281         if ( handler->GetType() == type )
 282             return handler;
 283
 284         node = node->Next();
 285     }
 286
 287     return NULL;
 288 }
 289
 290 void wxGDIImage::CleanUpHandlers()
 291 {
 292     wxNode *node = ms_handlers.First();
 293     while ( node )
 294     {
 295         wxGDIImageHandler *handler = (wxGDIImageHandler *)node->Data();
 296         wxNode *next = node->Next();
 297         delete handler;
 298         delete node;
 299         node = next;
 300     }
 301 }
 302
 303 void wxGDIImage::InitStandardHandlers()
 304 {
 305 #ifndef __WXMICROWIN__
 306     AddHandler(new wxBMPResourceHandler);
 307     AddHandler(new wxBMPFileHandler);
 308     AddHandler(new wxICOResourceHandler);
 309     AddHandler(new wxICOFileHandler);
 310 #endif
 311 }
 312
 313 #ifndef __WXMICROWIN__
 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
 359 #if wxUSE_PALETTE
 360     if ( success && palette )
 361     {
 362         bitmap->SetPalette(*palette);
 363     }
 364
 365     // it was copied by the bitmap if it was loaded successfully
 366     delete palette;
 367 #endif // wxUSE_PALETTE
 368
 369     return success;
 370 #else
 371     return FALSE;
 372 #endif
 373 }
 374
 375 bool wxBMPFileHandler::SaveFile(wxBitmap *bitmap,
 376                                 const wxString& name,
 377                                 int WXUNUSED(type),
 378                                 const wxPalette *pal)
 379 {
 380 #if wxUSE_IMAGE_LOADING_IN_MSW
 381
 382 #if wxUSE_PALETTE
 383     wxPalette *actualPalette = (wxPalette *)pal;
 384     if ( !actualPalette )
 385         actualPalette = bitmap->GetPalette();
 386 #else
 387     wxPalette *actualPalette = NULL;
 388 #endif // wxUSE_PALETTE
 389
 390     return wxSaveBitmap(WXSTRINGCAST name, bitmap, actualPalette) != 0;
 391 #else
 392     return FALSE;
 393 #endif
 394 }
 395
 396 // ----------------------------------------------------------------------------
 397 // wxIcon handlers
 398 // ----------------------------------------------------------------------------
 399
 400 bool wxICOFileHandler::LoadIcon(wxIcon *icon,
 401                                 const wxString& name,
 402                                 long WXUNUSED(flags),
 403                                 int desiredWidth, int desiredHeight)
 404 {
 405 #if wxUSE_RESOURCE_LOADING_IN_MSW
 406     icon->UnRef();
 407
 408     // actual size
 409     wxSize size;
 410
 411 #ifdef __WIN32__
 412     HICON hicon = NULL;
 413
 414     // Parse the filename: it may be of the form "filename;n" in order to
 415     // specify the nth icon in the file.
 416     //
 417     // For the moment, ignore the issue of possible semicolons in the
 418     // filename.
 419     int iconIndex = 0;
 420     wxString nameReal(name);
 421     wxString strIconIndex = name.AfterLast(wxT(';'));
 422     if (strIconIndex != name)
 423     {
 424         iconIndex = wxAtoi(strIconIndex);
 425         nameReal = name.BeforeLast(wxT(';'));
 426     }
 427
 428     // were we asked for a large icon?
 429     if ( desiredWidth == ::GetSystemMetrics(SM_CXICON) &&
 430          desiredHeight == ::GetSystemMetrics(SM_CYICON) )
 431     {
 432         // get the specified large icon from file
 433         if ( !::ExtractIconEx(nameReal, iconIndex, &hicon, NULL, 1) )
 434         {
 435             // it is not an error, but it might still be useful to be informed
 436             // about it optionally
 437             wxLogTrace(_T("iconload"),
 438                        _T("No large icons found in the file '%s'."),
 439                        name.c_str());
 440         }
 441     }
 442     else if ( desiredWidth == ::GetSystemMetrics(SM_CXSMICON) &&
 443               desiredHeight == ::GetSystemMetrics(SM_CYSMICON) )
 444     {
 445         // get the specified small icon from file
 446         if ( !::ExtractIconEx(nameReal, iconIndex, NULL, &hicon, 1) )
 447         {
 448             wxLogTrace(_T("iconload"),
 449                        _T("No small icons found in the file '%s'."),
 450                        name.c_str());
 451         }
 452     }
 453     //else: not standard size, load below
 454
 455     if ( !hicon )
 456     {
 457         // take any (the first one) icon from the file by default
 458         hicon = ::ExtractIcon(wxGetInstance(), nameReal, 0 /* first */);
 459     }
 460
 461     if ( !hicon )
 462     {
 463         wxLogSysError(_T("Failed to load icon from the file '%s'"),
 464                       name.c_str());
 465
 466         return FALSE;
 467     }
 468
 469     size = GetHiconSize(hicon);
 470 #else // Win16
 471     HICON hicon = ReadIconFile((wxChar *)name.c_str(),
 472                                wxGetInstance(),
 473                                &size.x, &size.y);
 474 #endif // Win32/Win16
 475
 476     if ( (desiredWidth != -1 && desiredWidth != size.x) ||
 477          (desiredHeight != -1 && desiredHeight != size.y) )
 478     {
 479         wxLogTrace(_T("iconload"),
 480                    _T("Returning FALSE from wxICOFileHandler::Load because of the size mismatch: actual (%d, %d), requested (%d, %d)"),
 481                    size.x, size.y,
 482                    desiredWidth, desiredHeight);
 483
 484         ::DestroyIcon(hicon);
 485
 486         return FALSE;
 487     }
 488
 489     icon->SetHICON((WXHICON)hicon);
 490     icon->SetSize(size.x, size.y);
 491
 492     return icon->Ok();
 493 #else
 494     return FALSE;
 495 #endif
 496 }
 497
 498 bool wxICOResourceHandler::LoadIcon(wxIcon *icon,
 499                                     const wxString& name,
 500                                     long WXUNUSED(flags),
 501                                     int desiredWidth, int desiredHeight)
 502 {
 503     HICON hicon;
 504
 505     // do we need the icon of the specific size or would any icon do?
 506     bool hasSize = desiredWidth != -1 || desiredHeight != -1;
 507
 508     wxASSERT_MSG( !hasSize || (desiredWidth != -1 && desiredHeight != -1),
 509                   _T("width and height should be either both -1 or not") );
 510
 511     // try to load the icon from this program first to allow overriding the
 512     // standard icons (although why one would want to do it considering that
 513     // we already have wxApp::GetStdIcon() is unclear)
 514
 515     // note that we can't just always call LoadImage() because it seems to do
 516     // some icon rescaling internally which results in very ugly 16x16 icons
 517 #if defined(__WIN32__) && !defined(__SC__)
 518     if ( hasSize )
 519     {
 520         hicon = (HICON)::LoadImage(wxGetInstance(), name, IMAGE_ICON,
 521                                     desiredWidth, desiredHeight,
 522                                     LR_DEFAULTCOLOR);
 523     }
 524     else
 525 #endif // Win32/!Win32
 526     {
 527         hicon = ::LoadIcon(wxGetInstance(), name);
 528     }
 529
 530     // next check if it's not a standard icon
 531     if ( !hicon && !hasSize )
 532     {
 533         static const struct
 534         {
 535             const wxChar *name;
 536             LPTSTR id;
 537         } stdIcons[] =
 538         {
 539             { wxT("wxICON_QUESTION"),   IDI_QUESTION    },
 540             { wxT("wxICON_WARNING"),    IDI_EXCLAMATION },
 541             { wxT("wxICON_ERROR"),      IDI_HAND        },
 542             { wxT("wxICON_INFORMATION"),       IDI_ASTERISK    },
 543         };
 544
 545         for ( size_t nIcon = 0; !hicon && nIcon < WXSIZEOF(stdIcons); nIcon++ )
 546         {
 547             if ( name == stdIcons[nIcon].name )
 548             {
 549                 hicon = ::LoadIcon((HINSTANCE)NULL, stdIcons[nIcon].id);
 550             }
 551         }
 552     }
 553
 554     wxSize size = GetHiconSize(hicon);
 555     icon->SetSize(size.x, size.y);
 556
 557     icon->SetHICON((WXHICON)hicon);
 558
 559     return icon->Ok();
 560 }
 561
 562 // ----------------------------------------------------------------------------
 563 // private functions
 564 // ----------------------------------------------------------------------------
 565
 566 static wxSize GetHiconSize(HICON hicon)
 567 {
 568     wxSize size(32, 32);    // default
 569
 570 #ifdef __WIN32__
 571     // Win32s doesn't have GetIconInfo function...
 572     if ( hicon && wxGetOsVersion() != wxWIN32S )
 573     {
 574         ICONINFO info;
 575         if ( !::GetIconInfo(hicon, &info) )
 576         {
 577             wxLogLastError(wxT("GetIconInfo"));
 578         }
 579         else
 580         {
 581             HBITMAP hbmp = info.hbmMask;
 582             if ( hbmp )
 583             {
 584                 BITMAP bm;
 585                 if ( ::GetObject(hbmp, sizeof(BITMAP), (LPSTR) &bm) )
 586                 {
 587                     size = wxSize(bm.bmWidth, bm.bmHeight);
 588                 }
 589
 590                 ::DeleteObject(info.hbmMask);
 591             }
 592             if ( info.hbmColor )
 593                 ::DeleteObject(info.hbmColor);
 594         }
 595     }
 596 #endif
 597
 598     return size;
 599 }
 600 #endif
 601     // __WXMICROWIN__