| 1 | /////////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: 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 license |
| 10 | /////////////////////////////////////////////////////////////////////////////// |
| 11 | |
| 12 | // ============================================================================ |
| 13 | // declarations |
| 14 | // ============================================================================ |
| 15 | |
| 16 | // ---------------------------------------------------------------------------- |
| 17 | // headers |
| 18 | // ---------------------------------------------------------------------------- |
| 19 | |
| 20 | #ifdef __GNUG__ |
| 21 | #pragma implementation "enhmeta.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 | #if wxUSE_ENH_METAFILE |
| 32 | |
| 33 | #ifndef WX_PRECOMP |
| 34 | #include "wx/string.h" |
| 35 | #include "wx/log.h" |
| 36 | #endif //WX_PRECOMP |
| 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 | IMPLEMENT_ABSTRACT_CLASS(wxEnhMetaFileDC, wxDC) |
| 49 | |
| 50 | // ---------------------------------------------------------------------------- |
| 51 | // macros |
| 52 | // ---------------------------------------------------------------------------- |
| 53 | |
| 54 | #define GetEMF() ((HENHMETAFILE)m_hMF) |
| 55 | #define GetEMFOf(mf) ((HENHMETAFILE)((mf).m_hMF)) |
| 56 | |
| 57 | // ---------------------------------------------------------------------------- |
| 58 | // private functions |
| 59 | // ---------------------------------------------------------------------------- |
| 60 | |
| 61 | // we must pass NULL if the string is empty to metafile functions |
| 62 | static inline const wxChar *GetMetaFileName(const wxString& fn) |
| 63 | { return !fn ? (wxChar *)NULL : fn.c_str(); } |
| 64 | |
| 65 | // ============================================================================ |
| 66 | // implementation |
| 67 | // ============================================================================ |
| 68 | |
| 69 | // ---------------------------------------------------------------------------- |
| 70 | // wxEnhMetaFile |
| 71 | // ---------------------------------------------------------------------------- |
| 72 | |
| 73 | void wxEnhMetaFile::Assign(const wxEnhMetaFile& mf) |
| 74 | { |
| 75 | if ( &mf == this ) |
| 76 | return; |
| 77 | |
| 78 | if ( mf.m_hMF ) |
| 79 | { |
| 80 | m_hMF = (WXHANDLE)::CopyEnhMetaFile(GetEMFOf(mf), |
| 81 | GetMetaFileName(m_filename)); |
| 82 | if ( !m_hMF ) |
| 83 | { |
| 84 | wxLogLastError(_T("CopyEnhMetaFile")); |
| 85 | } |
| 86 | } |
| 87 | else |
| 88 | { |
| 89 | m_hMF = 0; |
| 90 | } |
| 91 | } |
| 92 | |
| 93 | void wxEnhMetaFile::Free() |
| 94 | { |
| 95 | if ( m_hMF ) |
| 96 | { |
| 97 | if ( !::DeleteEnhMetaFile(GetEMF()) ) |
| 98 | { |
| 99 | wxLogLastError(_T("DeleteEnhMetaFile")); |
| 100 | } |
| 101 | } |
| 102 | } |
| 103 | |
| 104 | bool wxEnhMetaFile::Play(wxDC *dc, wxRect *rectBound) |
| 105 | { |
| 106 | wxCHECK_MSG( Ok(), FALSE, _T("can't play invalid enhanced metafile") ); |
| 107 | wxCHECK_MSG( dc, FALSE, _T("invalid wxDC in wxEnhMetaFile::Play") ); |
| 108 | |
| 109 | RECT rect; |
| 110 | if ( rectBound ) |
| 111 | { |
| 112 | rect.top = rectBound->y; |
| 113 | rect.left = rectBound->x; |
| 114 | rect.right = rectBound->x + rectBound->width; |
| 115 | rect.bottom = rectBound->y + rectBound->height; |
| 116 | } |
| 117 | else |
| 118 | { |
| 119 | wxSize size = GetSize(); |
| 120 | |
| 121 | rect.top = |
| 122 | rect.left = 0; |
| 123 | rect.right = size.x; |
| 124 | rect.bottom = size.y; |
| 125 | } |
| 126 | |
| 127 | if ( !::PlayEnhMetaFile(GetHdcOf(*dc), GetEMF(), &rect) ) |
| 128 | { |
| 129 | wxLogLastError(_T("PlayEnhMetaFile")); |
| 130 | |
| 131 | return FALSE; |
| 132 | } |
| 133 | |
| 134 | return TRUE; |
| 135 | } |
| 136 | |
| 137 | wxSize wxEnhMetaFile::GetSize() const |
| 138 | { |
| 139 | wxSize size = wxDefaultSize; |
| 140 | |
| 141 | if ( Ok() ) |
| 142 | { |
| 143 | ENHMETAHEADER hdr; |
| 144 | if ( !::GetEnhMetaFileHeader(GetEMF(), sizeof(hdr), &hdr) ) |
| 145 | { |
| 146 | wxLogLastError(_T("GetEnhMetaFileHeader")); |
| 147 | } |
| 148 | else |
| 149 | { |
| 150 | // the width and height are in HIMETRIC (0.01mm) units, transform |
| 151 | // them to pixels |
| 152 | LONG w = hdr.rclFrame.right, |
| 153 | h = hdr.rclFrame.bottom; |
| 154 | |
| 155 | HIMETRICToPixel(&w, &h); |
| 156 | |
| 157 | size.x = w; |
| 158 | size.y = h; |
| 159 | } |
| 160 | } |
| 161 | |
| 162 | return size; |
| 163 | } |
| 164 | |
| 165 | bool wxEnhMetaFile::SetClipboard(int WXUNUSED(width), int WXUNUSED(height)) |
| 166 | { |
| 167 | #if wxUSE_DRAG_AND_DROP |
| 168 | wxCHECK_MSG( m_hMF, FALSE, _T("can't copy invalid metafile to clipboard") ); |
| 169 | |
| 170 | return wxTheClipboard->AddData(new wxEnhMetaFileDataObject(*this)); |
| 171 | #else // !wxUSE_DRAG_AND_DROP |
| 172 | wxFAIL_MSG(_T("not implemented")); |
| 173 | return FALSE; |
| 174 | #endif // wxUSE_DRAG_AND_DROP/!wxUSE_DRAG_AND_DROP |
| 175 | } |
| 176 | |
| 177 | // ---------------------------------------------------------------------------- |
| 178 | // wxEnhMetaFileDC |
| 179 | // ---------------------------------------------------------------------------- |
| 180 | |
| 181 | wxEnhMetaFileDC::wxEnhMetaFileDC(const wxString& filename, |
| 182 | int width, int height, |
| 183 | const wxString& description) |
| 184 | { |
| 185 | ScreenHDC hdcRef; |
| 186 | RECT rect; |
| 187 | RECT *pRect; |
| 188 | if ( width && height ) |
| 189 | { |
| 190 | rect.top = |
| 191 | rect.left = 0; |
| 192 | rect.right = width; |
| 193 | rect.bottom = height; |
| 194 | |
| 195 | // CreateEnhMetaFile() wants them in HIMETRIC |
| 196 | PixelToHIMETRIC(&rect.right, &rect.bottom); |
| 197 | |
| 198 | pRect = ▭ |
| 199 | } |
| 200 | else |
| 201 | { |
| 202 | // GDI will try to find out the size for us (not recommended) |
| 203 | pRect = (LPRECT)NULL; |
| 204 | } |
| 205 | |
| 206 | m_hDC = (WXHDC)::CreateEnhMetaFile(hdcRef, GetMetaFileName(filename), |
| 207 | pRect, description); |
| 208 | if ( !m_hDC ) |
| 209 | { |
| 210 | wxLogLastError(_T("CreateEnhMetaFile")); |
| 211 | } |
| 212 | } |
| 213 | |
| 214 | wxEnhMetaFile *wxEnhMetaFileDC::Close() |
| 215 | { |
| 216 | wxCHECK_MSG( Ok(), NULL, _T("invalid wxEnhMetaFileDC") ); |
| 217 | |
| 218 | HENHMETAFILE hMF = ::CloseEnhMetaFile(GetHdc()); |
| 219 | if ( !hMF ) |
| 220 | { |
| 221 | wxLogLastError(_T("CloseEnhMetaFile")); |
| 222 | |
| 223 | return NULL; |
| 224 | } |
| 225 | |
| 226 | wxEnhMetaFile *mf = new wxEnhMetaFile; |
| 227 | mf->SetHENHMETAFILE((WXHANDLE)hMF); |
| 228 | return mf; |
| 229 | } |
| 230 | |
| 231 | wxEnhMetaFileDC::~wxEnhMetaFileDC() |
| 232 | { |
| 233 | // avoid freeing it in the base class dtor |
| 234 | m_hDC = 0; |
| 235 | } |
| 236 | |
| 237 | #if wxUSE_DRAG_AND_DROP |
| 238 | |
| 239 | // ---------------------------------------------------------------------------- |
| 240 | // wxEnhMetaFileDataObject |
| 241 | // ---------------------------------------------------------------------------- |
| 242 | |
| 243 | wxDataFormat |
| 244 | wxEnhMetaFileDataObject::GetPreferredFormat(Direction WXUNUSED(dir)) const |
| 245 | { |
| 246 | return wxDF_ENHMETAFILE; |
| 247 | } |
| 248 | |
| 249 | size_t wxEnhMetaFileDataObject::GetFormatCount(Direction WXUNUSED(dir)) const |
| 250 | { |
| 251 | // wxDF_ENHMETAFILE and wxDF_METAFILE |
| 252 | return 2; |
| 253 | } |
| 254 | |
| 255 | void wxEnhMetaFileDataObject::GetAllFormats(wxDataFormat *formats, |
| 256 | Direction WXUNUSED(dir)) const |
| 257 | { |
| 258 | formats[0] = wxDF_ENHMETAFILE; |
| 259 | formats[1] = wxDF_METAFILE; |
| 260 | } |
| 261 | |
| 262 | size_t wxEnhMetaFileDataObject::GetDataSize(const wxDataFormat& format) const |
| 263 | { |
| 264 | if ( format == wxDF_ENHMETAFILE ) |
| 265 | { |
| 266 | // we pass data by handle and not HGLOBAL |
| 267 | return 0u; |
| 268 | } |
| 269 | else |
| 270 | { |
| 271 | wxASSERT_MSG( format == wxDF_METAFILE, _T("unsupported format") ); |
| 272 | |
| 273 | return sizeof(METAFILEPICT); |
| 274 | } |
| 275 | } |
| 276 | |
| 277 | bool wxEnhMetaFileDataObject::GetDataHere(const wxDataFormat& format, void *buf) const |
| 278 | { |
| 279 | wxCHECK_MSG( m_metafile.Ok(), FALSE, _T("copying invalid enh metafile") ); |
| 280 | |
| 281 | HENHMETAFILE hEMF = (HENHMETAFILE)m_metafile.GetHENHMETAFILE(); |
| 282 | |
| 283 | if ( format == wxDF_ENHMETAFILE ) |
| 284 | { |
| 285 | HENHMETAFILE hEMFCopy = ::CopyEnhMetaFile(hEMF, NULL); |
| 286 | if ( !hEMFCopy ) |
| 287 | { |
| 288 | wxLogLastError(_T("CopyEnhMetaFile")); |
| 289 | |
| 290 | return FALSE; |
| 291 | } |
| 292 | |
| 293 | *(HENHMETAFILE *)buf = hEMFCopy; |
| 294 | } |
| 295 | else |
| 296 | { |
| 297 | wxASSERT_MSG( format == wxDF_METAFILE, _T("unsupported format") ); |
| 298 | |
| 299 | // convert to WMF |
| 300 | |
| 301 | ScreenHDC hdc; |
| 302 | |
| 303 | // first get the buffer size and alloc memory |
| 304 | size_t size = ::GetWinMetaFileBits(hEMF, 0, NULL, MM_ANISOTROPIC, hdc); |
| 305 | wxCHECK_MSG( size, FALSE, _T("GetWinMetaFileBits() failed") ); |
| 306 | |
| 307 | BYTE *bits = (BYTE *)malloc(size); |
| 308 | |
| 309 | // then get the enh metafile bits |
| 310 | if ( !::GetWinMetaFileBits(hEMF, size, bits, MM_ANISOTROPIC, hdc) ) |
| 311 | { |
| 312 | wxLogLastError(_T("GetWinMetaFileBits")); |
| 313 | |
| 314 | free(bits); |
| 315 | |
| 316 | return FALSE; |
| 317 | } |
| 318 | |
| 319 | // and finally convert them to the WMF |
| 320 | HMETAFILE hMF = ::SetMetaFileBitsEx(size, bits); |
| 321 | free(bits); |
| 322 | if ( !hMF ) |
| 323 | { |
| 324 | wxLogLastError(_T("SetMetaFileBitsEx")); |
| 325 | |
| 326 | return FALSE; |
| 327 | } |
| 328 | |
| 329 | METAFILEPICT *mfpict = (METAFILEPICT *)buf; |
| 330 | |
| 331 | wxSize sizeMF = m_metafile.GetSize(); |
| 332 | mfpict->hMF = hMF; |
| 333 | mfpict->mm = MM_ANISOTROPIC; |
| 334 | mfpict->xExt = sizeMF.x; |
| 335 | mfpict->yExt = sizeMF.y; |
| 336 | |
| 337 | PixelToHIMETRIC(&mfpict->xExt, &mfpict->yExt); |
| 338 | } |
| 339 | |
| 340 | return TRUE; |
| 341 | } |
| 342 | |
| 343 | bool wxEnhMetaFileDataObject::SetData(const wxDataFormat& format, |
| 344 | size_t WXUNUSED(len), |
| 345 | const void *buf) |
| 346 | { |
| 347 | HENHMETAFILE hEMF; |
| 348 | |
| 349 | if ( format == wxDF_ENHMETAFILE ) |
| 350 | { |
| 351 | hEMF = *(HENHMETAFILE *)buf; |
| 352 | |
| 353 | wxCHECK_MSG( hEMF, FALSE, _T("pasting invalid enh metafile") ); |
| 354 | } |
| 355 | else |
| 356 | { |
| 357 | wxASSERT_MSG( format == wxDF_METAFILE, _T("unsupported format") ); |
| 358 | |
| 359 | // convert from WMF |
| 360 | const METAFILEPICT *mfpict = (const METAFILEPICT *)buf; |
| 361 | |
| 362 | // first get the buffer size |
| 363 | size_t size = ::GetMetaFileBitsEx(mfpict->hMF, 0, NULL); |
| 364 | wxCHECK_MSG( size, FALSE, _T("GetMetaFileBitsEx() failed") ); |
| 365 | |
| 366 | // then get metafile bits |
| 367 | BYTE *bits = (BYTE *)malloc(size); |
| 368 | if ( !::GetMetaFileBitsEx(mfpict->hMF, size, bits) ) |
| 369 | { |
| 370 | wxLogLastError(_T("GetMetaFileBitsEx")); |
| 371 | |
| 372 | free(bits); |
| 373 | |
| 374 | return FALSE; |
| 375 | } |
| 376 | |
| 377 | ScreenHDC hdcRef; |
| 378 | |
| 379 | // and finally create an enhanced metafile from them |
| 380 | hEMF = ::SetWinMetaFileBits(size, bits, hdcRef, mfpict); |
| 381 | free(bits); |
| 382 | if ( !hEMF ) |
| 383 | { |
| 384 | wxLogLastError(_T("SetWinMetaFileBits")); |
| 385 | |
| 386 | return FALSE; |
| 387 | } |
| 388 | } |
| 389 | |
| 390 | m_metafile.SetHENHMETAFILE((WXHANDLE)hEMF); |
| 391 | |
| 392 | return TRUE; |
| 393 | } |
| 394 | |
| 395 | // ---------------------------------------------------------------------------- |
| 396 | // wxEnhMetaFileSimpleDataObject |
| 397 | // ---------------------------------------------------------------------------- |
| 398 | |
| 399 | size_t wxEnhMetaFileSimpleDataObject::GetDataSize() const |
| 400 | { |
| 401 | // we pass data by handle and not HGLOBAL |
| 402 | return 0u; |
| 403 | } |
| 404 | |
| 405 | bool wxEnhMetaFileSimpleDataObject::GetDataHere(void *buf) const |
| 406 | { |
| 407 | wxCHECK_MSG( m_metafile.Ok(), FALSE, _T("copying invalid enh metafile") ); |
| 408 | |
| 409 | HENHMETAFILE hEMF = (HENHMETAFILE)m_metafile.GetHENHMETAFILE(); |
| 410 | |
| 411 | HENHMETAFILE hEMFCopy = ::CopyEnhMetaFile(hEMF, NULL); |
| 412 | if ( !hEMFCopy ) |
| 413 | { |
| 414 | wxLogLastError(_T("CopyEnhMetaFile")); |
| 415 | |
| 416 | return FALSE; |
| 417 | } |
| 418 | |
| 419 | *(HENHMETAFILE *)buf = hEMFCopy; |
| 420 | return TRUE; |
| 421 | } |
| 422 | |
| 423 | bool wxEnhMetaFileSimpleDataObject::SetData(size_t WXUNUSED(len), |
| 424 | const void *buf) |
| 425 | { |
| 426 | HENHMETAFILE hEMF = *(HENHMETAFILE *)buf; |
| 427 | |
| 428 | wxCHECK_MSG( hEMF, FALSE, _T("pasting invalid enh metafile") ); |
| 429 | m_metafile.SetHENHMETAFILE((WXHANDLE)hEMF); |
| 430 | |
| 431 | return TRUE; |
| 432 | } |
| 433 | |
| 434 | #endif // wxUSE_DRAG_AND_DROP |
| 435 | |
| 436 | #endif // wxUSE_ENH_METAFILE |