| 1 | /////////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: src/msw/enhmeta.cpp |
| 3 | // Purpose: implementation of wxEnhMetaFileXXX classes |
| 4 | // Author: Vadim Zeitlin |
| 5 | // Modified by: |
| 6 | // Created: 13.01.00 |
| 7 | // RCS-ID: $Id$ |
| 8 | // Copyright: (c) 2000 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr> |
| 9 | // Licence: wxWindows licence |
| 10 | /////////////////////////////////////////////////////////////////////////////// |
| 11 | |
| 12 | // ============================================================================ |
| 13 | // declarations |
| 14 | // ============================================================================ |
| 15 | |
| 16 | // ---------------------------------------------------------------------------- |
| 17 | // headers |
| 18 | // ---------------------------------------------------------------------------- |
| 19 | |
| 20 | // For compilers that support precompilation, includes "wx.h". |
| 21 | #include "wx/wxprec.h" |
| 22 | |
| 23 | #ifdef __BORLANDC__ |
| 24 | #pragma hdrstop |
| 25 | #endif |
| 26 | |
| 27 | #if wxUSE_ENH_METAFILE |
| 28 | |
| 29 | #ifndef WX_PRECOMP |
| 30 | #include "wx/string.h" |
| 31 | #include "wx/log.h" |
| 32 | #include "wx/intl.h" |
| 33 | #endif //WX_PRECOMP |
| 34 | |
| 35 | #include "wx/dc.h" |
| 36 | #include "wx/msw/dc.h" |
| 37 | |
| 38 | #include "wx/metafile.h" |
| 39 | #include "wx/clipbrd.h" |
| 40 | |
| 41 | #include "wx/msw/private.h" |
| 42 | |
| 43 | // ---------------------------------------------------------------------------- |
| 44 | // wxWin macros |
| 45 | // ---------------------------------------------------------------------------- |
| 46 | |
| 47 | IMPLEMENT_DYNAMIC_CLASS(wxEnhMetaFile, wxObject) |
| 48 | |
| 49 | // ---------------------------------------------------------------------------- |
| 50 | // macros |
| 51 | // ---------------------------------------------------------------------------- |
| 52 | |
| 53 | #define GetEMF() ((HENHMETAFILE)m_hMF) |
| 54 | #define GetEMFOf(mf) ((HENHMETAFILE)((mf).m_hMF)) |
| 55 | |
| 56 | // ---------------------------------------------------------------------------- |
| 57 | // private functions |
| 58 | // ---------------------------------------------------------------------------- |
| 59 | |
| 60 | // we must pass NULL if the string is empty to metafile functions |
| 61 | static inline const wxChar *GetMetaFileName(const wxString& fn) |
| 62 | { return !fn ? (const wxChar *)NULL : (const wxChar*)fn.wx_str(); } |
| 63 | |
| 64 | // ============================================================================ |
| 65 | // implementation |
| 66 | // ============================================================================ |
| 67 | |
| 68 | // ---------------------------------------------------------------------------- |
| 69 | // wxEnhMetaFile |
| 70 | // ---------------------------------------------------------------------------- |
| 71 | |
| 72 | wxGDIRefData *wxEnhMetaFile::CreateGDIRefData() const |
| 73 | { |
| 74 | wxFAIL_MSG( _T("must be implemented if used") ); |
| 75 | |
| 76 | return NULL; |
| 77 | } |
| 78 | |
| 79 | wxGDIRefData * |
| 80 | wxEnhMetaFile::CloneGDIRefData(const wxGDIRefData *WXUNUSED(data)) const |
| 81 | { |
| 82 | wxFAIL_MSG( _T("must be implemented if used") ); |
| 83 | |
| 84 | return NULL; |
| 85 | } |
| 86 | |
| 87 | void wxEnhMetaFile::Init() |
| 88 | { |
| 89 | if ( m_filename.empty() ) |
| 90 | { |
| 91 | m_hMF = 0; |
| 92 | } |
| 93 | else // have valid file name, load metafile from it |
| 94 | { |
| 95 | m_hMF = (WXHANDLE)::GetEnhMetaFile(m_filename.fn_str()); |
| 96 | if ( !m_hMF ) |
| 97 | wxLogSysError(_("Failed to load metafile from file \"%s\"."), |
| 98 | m_filename.c_str()); |
| 99 | } |
| 100 | } |
| 101 | |
| 102 | void wxEnhMetaFile::Assign(const wxEnhMetaFile& mf) |
| 103 | { |
| 104 | if ( &mf == this ) |
| 105 | return; |
| 106 | |
| 107 | if ( mf.m_hMF ) |
| 108 | { |
| 109 | m_hMF = (WXHANDLE)::CopyEnhMetaFile(GetEMFOf(mf), |
| 110 | GetMetaFileName(m_filename)); |
| 111 | if ( !m_hMF ) |
| 112 | { |
| 113 | wxLogLastError(_T("CopyEnhMetaFile")); |
| 114 | } |
| 115 | } |
| 116 | else |
| 117 | { |
| 118 | m_hMF = 0; |
| 119 | } |
| 120 | } |
| 121 | |
| 122 | void wxEnhMetaFile::Free() |
| 123 | { |
| 124 | if ( m_hMF ) |
| 125 | { |
| 126 | if ( !::DeleteEnhMetaFile(GetEMF()) ) |
| 127 | { |
| 128 | wxLogLastError(_T("DeleteEnhMetaFile")); |
| 129 | } |
| 130 | } |
| 131 | } |
| 132 | |
| 133 | bool wxEnhMetaFile::Play(wxDC *dc, wxRect *rectBound) |
| 134 | { |
| 135 | wxCHECK_MSG( Ok(), false, _T("can't play invalid enhanced metafile") ); |
| 136 | wxCHECK_MSG( dc, false, _T("invalid wxDC in wxEnhMetaFile::Play") ); |
| 137 | |
| 138 | RECT rect; |
| 139 | if ( rectBound ) |
| 140 | { |
| 141 | rect.top = rectBound->y; |
| 142 | rect.left = rectBound->x; |
| 143 | rect.right = rectBound->x + rectBound->width; |
| 144 | rect.bottom = rectBound->y + rectBound->height; |
| 145 | } |
| 146 | else |
| 147 | { |
| 148 | wxSize size = GetSize(); |
| 149 | |
| 150 | rect.top = |
| 151 | rect.left = 0; |
| 152 | rect.right = size.x; |
| 153 | rect.bottom = size.y; |
| 154 | } |
| 155 | |
| 156 | wxDCImpl *impl = dc->GetImpl(); |
| 157 | wxMSWDCImpl *msw_impl = wxDynamicCast( impl, wxMSWDCImpl ); |
| 158 | if (!msw_impl) |
| 159 | return false; |
| 160 | |
| 161 | if ( !::PlayEnhMetaFile(GetHdcOf(*msw_impl), GetEMF(), &rect) ) |
| 162 | { |
| 163 | wxLogLastError(_T("PlayEnhMetaFile")); |
| 164 | |
| 165 | return false; |
| 166 | } |
| 167 | |
| 168 | return true; |
| 169 | } |
| 170 | |
| 171 | wxSize wxEnhMetaFile::GetSize() const |
| 172 | { |
| 173 | wxSize size = wxDefaultSize; |
| 174 | |
| 175 | if ( Ok() ) |
| 176 | { |
| 177 | ENHMETAHEADER hdr; |
| 178 | if ( !::GetEnhMetaFileHeader(GetEMF(), sizeof(hdr), &hdr) ) |
| 179 | { |
| 180 | wxLogLastError(_T("GetEnhMetaFileHeader")); |
| 181 | } |
| 182 | else |
| 183 | { |
| 184 | // the width and height are in HIMETRIC (0.01mm) units, transform |
| 185 | // them to pixels |
| 186 | LONG w = hdr.rclFrame.right, |
| 187 | h = hdr.rclFrame.bottom; |
| 188 | |
| 189 | HIMETRICToPixel(&w, &h); |
| 190 | |
| 191 | size.x = w; |
| 192 | size.y = h; |
| 193 | } |
| 194 | } |
| 195 | |
| 196 | return size; |
| 197 | } |
| 198 | |
| 199 | bool wxEnhMetaFile::SetClipboard(int WXUNUSED(width), int WXUNUSED(height)) |
| 200 | { |
| 201 | #if wxUSE_DRAG_AND_DROP && wxUSE_CLIPBOARD |
| 202 | wxCHECK_MSG( m_hMF, false, _T("can't copy invalid metafile to clipboard") ); |
| 203 | |
| 204 | return wxTheClipboard->AddData(new wxEnhMetaFileDataObject(*this)); |
| 205 | #else // !wxUSE_DRAG_AND_DROP |
| 206 | wxFAIL_MSG(_T("not implemented")); |
| 207 | return false; |
| 208 | #endif // wxUSE_DRAG_AND_DROP/!wxUSE_DRAG_AND_DROP |
| 209 | } |
| 210 | |
| 211 | // ---------------------------------------------------------------------------- |
| 212 | // wxEnhMetaFileDCImpl |
| 213 | // ---------------------------------------------------------------------------- |
| 214 | |
| 215 | class wxEnhMetaFileDCImpl : public wxMSWDCImpl |
| 216 | { |
| 217 | public: |
| 218 | wxEnhMetaFileDCImpl( wxEnhMetaFileDC *owner, |
| 219 | const wxString& filename, int width, int height, |
| 220 | const wxString& description ); |
| 221 | virtual ~wxEnhMetaFileDCImpl(); |
| 222 | |
| 223 | // obtain a pointer to the new metafile (caller should delete it) |
| 224 | wxEnhMetaFile *Close(); |
| 225 | |
| 226 | protected: |
| 227 | virtual void DoGetSize(int *width, int *height) const; |
| 228 | |
| 229 | private: |
| 230 | // size passed to ctor and returned by DoGetSize() |
| 231 | int m_width, |
| 232 | m_height; |
| 233 | }; |
| 234 | |
| 235 | |
| 236 | wxEnhMetaFileDCImpl::wxEnhMetaFileDCImpl( wxEnhMetaFileDC* owner, |
| 237 | const wxString& filename, |
| 238 | int width, int height, |
| 239 | const wxString& description ) |
| 240 | : wxMSWDCImpl( owner ) |
| 241 | { |
| 242 | m_width = width; |
| 243 | m_height = height; |
| 244 | |
| 245 | RECT rect; |
| 246 | RECT *pRect; |
| 247 | if ( width && height ) |
| 248 | { |
| 249 | rect.top = |
| 250 | rect.left = 0; |
| 251 | rect.right = width; |
| 252 | rect.bottom = height; |
| 253 | |
| 254 | // CreateEnhMetaFile() wants them in HIMETRIC |
| 255 | PixelToHIMETRIC(&rect.right, &rect.bottom); |
| 256 | |
| 257 | pRect = ▭ |
| 258 | } |
| 259 | else |
| 260 | { |
| 261 | // GDI will try to find out the size for us (not recommended) |
| 262 | pRect = (LPRECT)NULL; |
| 263 | } |
| 264 | |
| 265 | ScreenHDC hdcRef; |
| 266 | m_hDC = (WXHDC)::CreateEnhMetaFile(hdcRef, GetMetaFileName(filename), |
| 267 | pRect, description.wx_str()); |
| 268 | if ( !m_hDC ) |
| 269 | { |
| 270 | wxLogLastError(_T("CreateEnhMetaFile")); |
| 271 | } |
| 272 | } |
| 273 | |
| 274 | void wxEnhMetaFileDCImpl::DoGetSize(int *width, int *height) const |
| 275 | { |
| 276 | if ( width ) |
| 277 | *width = m_width; |
| 278 | if ( height ) |
| 279 | *height = m_height; |
| 280 | } |
| 281 | |
| 282 | wxEnhMetaFile *wxEnhMetaFileDCImpl::Close() |
| 283 | { |
| 284 | wxCHECK_MSG( IsOk(), NULL, _T("invalid wxEnhMetaFileDC") ); |
| 285 | |
| 286 | HENHMETAFILE hMF = ::CloseEnhMetaFile(GetHdc()); |
| 287 | if ( !hMF ) |
| 288 | { |
| 289 | wxLogLastError(_T("CloseEnhMetaFile")); |
| 290 | |
| 291 | return NULL; |
| 292 | } |
| 293 | |
| 294 | wxEnhMetaFile *mf = new wxEnhMetaFile; |
| 295 | mf->SetHENHMETAFILE((WXHANDLE)hMF); |
| 296 | return mf; |
| 297 | } |
| 298 | |
| 299 | wxEnhMetaFileDCImpl::~wxEnhMetaFileDCImpl() |
| 300 | { |
| 301 | // avoid freeing it in the base class dtor |
| 302 | m_hDC = 0; |
| 303 | } |
| 304 | |
| 305 | // ---------------------------------------------------------------------------- |
| 306 | // wxEnhMetaFileDC |
| 307 | // ---------------------------------------------------------------------------- |
| 308 | |
| 309 | IMPLEMENT_ABSTRACT_CLASS(wxEnhMetaFileDC, wxDC) |
| 310 | |
| 311 | wxEnhMetaFileDC::wxEnhMetaFileDC(const wxString& filename, |
| 312 | int width, int height, |
| 313 | const wxString& description) |
| 314 | : wxDC(new wxEnhMetaFileDCImpl(this, |
| 315 | filename, |
| 316 | width, height, |
| 317 | description)) |
| 318 | { |
| 319 | } |
| 320 | |
| 321 | wxEnhMetaFile *wxEnhMetaFileDC::Close() |
| 322 | { |
| 323 | wxEnhMetaFileDCImpl * const |
| 324 | impl = wx_static_cast(wxEnhMetaFileDCImpl *, GetImpl()); |
| 325 | wxCHECK_MSG( impl, NULL, _T("no wxEnhMetaFileDC implementation") ); |
| 326 | |
| 327 | return impl->Close(); |
| 328 | } |
| 329 | |
| 330 | #if wxUSE_DRAG_AND_DROP |
| 331 | |
| 332 | // ---------------------------------------------------------------------------- |
| 333 | // wxEnhMetaFileDataObject |
| 334 | // ---------------------------------------------------------------------------- |
| 335 | |
| 336 | wxDataFormat |
| 337 | wxEnhMetaFileDataObject::GetPreferredFormat(Direction WXUNUSED(dir)) const |
| 338 | { |
| 339 | return wxDF_ENHMETAFILE; |
| 340 | } |
| 341 | |
| 342 | size_t wxEnhMetaFileDataObject::GetFormatCount(Direction WXUNUSED(dir)) const |
| 343 | { |
| 344 | // wxDF_ENHMETAFILE and wxDF_METAFILE |
| 345 | return 2; |
| 346 | } |
| 347 | |
| 348 | void wxEnhMetaFileDataObject::GetAllFormats(wxDataFormat *formats, |
| 349 | Direction WXUNUSED(dir)) const |
| 350 | { |
| 351 | formats[0] = wxDF_ENHMETAFILE; |
| 352 | formats[1] = wxDF_METAFILE; |
| 353 | } |
| 354 | |
| 355 | size_t wxEnhMetaFileDataObject::GetDataSize(const wxDataFormat& format) const |
| 356 | { |
| 357 | if ( format == wxDF_ENHMETAFILE ) |
| 358 | { |
| 359 | // we pass data by handle and not HGLOBAL |
| 360 | return 0u; |
| 361 | } |
| 362 | else |
| 363 | { |
| 364 | wxASSERT_MSG( format == wxDF_METAFILE, _T("unsupported format") ); |
| 365 | |
| 366 | return sizeof(METAFILEPICT); |
| 367 | } |
| 368 | } |
| 369 | |
| 370 | bool wxEnhMetaFileDataObject::GetDataHere(const wxDataFormat& format, void *buf) const |
| 371 | { |
| 372 | wxCHECK_MSG( m_metafile.Ok(), false, _T("copying invalid enh metafile") ); |
| 373 | |
| 374 | HENHMETAFILE hEMF = (HENHMETAFILE)m_metafile.GetHENHMETAFILE(); |
| 375 | |
| 376 | if ( format == wxDF_ENHMETAFILE ) |
| 377 | { |
| 378 | HENHMETAFILE hEMFCopy = ::CopyEnhMetaFile(hEMF, NULL); |
| 379 | if ( !hEMFCopy ) |
| 380 | { |
| 381 | wxLogLastError(_T("CopyEnhMetaFile")); |
| 382 | |
| 383 | return false; |
| 384 | } |
| 385 | |
| 386 | *(HENHMETAFILE *)buf = hEMFCopy; |
| 387 | } |
| 388 | else |
| 389 | { |
| 390 | wxASSERT_MSG( format == wxDF_METAFILE, _T("unsupported format") ); |
| 391 | |
| 392 | // convert to WMF |
| 393 | |
| 394 | ScreenHDC hdc; |
| 395 | |
| 396 | // first get the buffer size and alloc memory |
| 397 | size_t size = ::GetWinMetaFileBits(hEMF, 0, NULL, MM_ANISOTROPIC, hdc); |
| 398 | wxCHECK_MSG( size, false, _T("GetWinMetaFileBits() failed") ); |
| 399 | |
| 400 | BYTE *bits = (BYTE *)malloc(size); |
| 401 | |
| 402 | // then get the enh metafile bits |
| 403 | if ( !::GetWinMetaFileBits(hEMF, size, bits, MM_ANISOTROPIC, hdc) ) |
| 404 | { |
| 405 | wxLogLastError(_T("GetWinMetaFileBits")); |
| 406 | |
| 407 | free(bits); |
| 408 | |
| 409 | return false; |
| 410 | } |
| 411 | |
| 412 | // and finally convert them to the WMF |
| 413 | HMETAFILE hMF = ::SetMetaFileBitsEx(size, bits); |
| 414 | free(bits); |
| 415 | if ( !hMF ) |
| 416 | { |
| 417 | wxLogLastError(_T("SetMetaFileBitsEx")); |
| 418 | |
| 419 | return false; |
| 420 | } |
| 421 | |
| 422 | METAFILEPICT *mfpict = (METAFILEPICT *)buf; |
| 423 | |
| 424 | wxSize sizeMF = m_metafile.GetSize(); |
| 425 | mfpict->hMF = hMF; |
| 426 | mfpict->mm = MM_ANISOTROPIC; |
| 427 | mfpict->xExt = sizeMF.x; |
| 428 | mfpict->yExt = sizeMF.y; |
| 429 | |
| 430 | PixelToHIMETRIC(&mfpict->xExt, &mfpict->yExt); |
| 431 | } |
| 432 | |
| 433 | return true; |
| 434 | } |
| 435 | |
| 436 | bool wxEnhMetaFileDataObject::SetData(const wxDataFormat& format, |
| 437 | size_t WXUNUSED(len), |
| 438 | const void *buf) |
| 439 | { |
| 440 | HENHMETAFILE hEMF; |
| 441 | |
| 442 | if ( format == wxDF_ENHMETAFILE ) |
| 443 | { |
| 444 | hEMF = *(HENHMETAFILE *)buf; |
| 445 | |
| 446 | wxCHECK_MSG( hEMF, false, _T("pasting invalid enh metafile") ); |
| 447 | } |
| 448 | else |
| 449 | { |
| 450 | wxASSERT_MSG( format == wxDF_METAFILE, _T("unsupported format") ); |
| 451 | |
| 452 | // convert from WMF |
| 453 | const METAFILEPICT *mfpict = (const METAFILEPICT *)buf; |
| 454 | |
| 455 | // first get the buffer size |
| 456 | size_t size = ::GetMetaFileBitsEx(mfpict->hMF, 0, NULL); |
| 457 | wxCHECK_MSG( size, false, _T("GetMetaFileBitsEx() failed") ); |
| 458 | |
| 459 | // then get metafile bits |
| 460 | BYTE *bits = (BYTE *)malloc(size); |
| 461 | if ( !::GetMetaFileBitsEx(mfpict->hMF, size, bits) ) |
| 462 | { |
| 463 | wxLogLastError(_T("GetMetaFileBitsEx")); |
| 464 | |
| 465 | free(bits); |
| 466 | |
| 467 | return false; |
| 468 | } |
| 469 | |
| 470 | ScreenHDC hdcRef; |
| 471 | |
| 472 | // and finally create an enhanced metafile from them |
| 473 | hEMF = ::SetWinMetaFileBits(size, bits, hdcRef, mfpict); |
| 474 | free(bits); |
| 475 | if ( !hEMF ) |
| 476 | { |
| 477 | wxLogLastError(_T("SetWinMetaFileBits")); |
| 478 | |
| 479 | return false; |
| 480 | } |
| 481 | } |
| 482 | |
| 483 | m_metafile.SetHENHMETAFILE((WXHANDLE)hEMF); |
| 484 | |
| 485 | return true; |
| 486 | } |
| 487 | |
| 488 | // ---------------------------------------------------------------------------- |
| 489 | // wxEnhMetaFileSimpleDataObject |
| 490 | // ---------------------------------------------------------------------------- |
| 491 | |
| 492 | size_t wxEnhMetaFileSimpleDataObject::GetDataSize() const |
| 493 | { |
| 494 | // we pass data by handle and not HGLOBAL |
| 495 | return 0u; |
| 496 | } |
| 497 | |
| 498 | bool wxEnhMetaFileSimpleDataObject::GetDataHere(void *buf) const |
| 499 | { |
| 500 | wxCHECK_MSG( m_metafile.Ok(), false, _T("copying invalid enh metafile") ); |
| 501 | |
| 502 | HENHMETAFILE hEMF = (HENHMETAFILE)m_metafile.GetHENHMETAFILE(); |
| 503 | |
| 504 | HENHMETAFILE hEMFCopy = ::CopyEnhMetaFile(hEMF, NULL); |
| 505 | if ( !hEMFCopy ) |
| 506 | { |
| 507 | wxLogLastError(_T("CopyEnhMetaFile")); |
| 508 | |
| 509 | return false; |
| 510 | } |
| 511 | |
| 512 | *(HENHMETAFILE *)buf = hEMFCopy; |
| 513 | return true; |
| 514 | } |
| 515 | |
| 516 | bool wxEnhMetaFileSimpleDataObject::SetData(size_t WXUNUSED(len), |
| 517 | const void *buf) |
| 518 | { |
| 519 | HENHMETAFILE hEMF = *(HENHMETAFILE *)buf; |
| 520 | |
| 521 | wxCHECK_MSG( hEMF, false, _T("pasting invalid enh metafile") ); |
| 522 | m_metafile.SetHENHMETAFILE((WXHANDLE)hEMF); |
| 523 | |
| 524 | return true; |
| 525 | } |
| 526 | |
| 527 | |
| 528 | #endif // wxUSE_DRAG_AND_DROP |
| 529 | |
| 530 | #endif // wxUSE_ENH_METAFILE |