src/mac/carbon/metafile.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        metafile.cpp
   3 // Purpose:     wxMetaFile, wxMetaFileDC etc. These classes are optional.
   4 // Author:      Stefan Csomor
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Stefan Csomor
   9 // Licence:       wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #include "wx/wxprec.h"
  13
  14 #ifdef __BORLANDC__
  15 #pragma hdrstop
  16 #endif
  17
  18 #if wxUSE_METAFILE
  19
  20 #ifndef WX_PRECOMP
  21     #include "wx/utils.h"
  22     #include "wx/app.h"
  23 #endif
  24
  25 #include "wx/metafile.h"
  26 #include "wx/clipbrd.h"
  27 #include "wx/mac/private.h"
  28
  29 #include <stdio.h>
  30 #include <string.h>
  31
  32 IMPLEMENT_DYNAMIC_CLASS(wxMetafile, wxObject)
  33 IMPLEMENT_ABSTRACT_CLASS(wxMetafileDC, wxDC)
  34
  35 class wxMetafileRefData: public wxGDIRefData
  36 {
  37     friend class WXDLLEXPORT wxMetafile;
  38
  39 public:
  40     wxMetafileRefData();
  41     ~wxMetafileRefData();
  42
  43 private:
  44     PicHandle m_metafile;
  45
  46 #if wxMAC_USE_CORE_GRAPHICS
  47     QDPictRef m_qdPictRef;
  48 #endif
  49 };
  50
  51 extern bool wxClipboardIsOpen;
  52
  53
  54 // Metafiles:
  55 // Currently, the only purpose for making a metafile
  56 // is to put it on the clipboard.
  57
  58 wxMetafileRefData::wxMetafileRefData()
  59 {
  60     m_metafile = 0;
  61
  62 #if wxMAC_USE_CORE_GRAPHICS
  63     m_qdPictRef = NULL;
  64 #endif
  65 }
  66
  67 wxMetafileRefData::~wxMetafileRefData()
  68 {
  69     if (m_metafile)
  70     {
  71         KillPicture( (PicHandle)m_metafile );
  72         m_metafile = NULL;
  73
  74 #if wxMAC_USE_CORE_GRAPHICS
  75         QDPictRelease( m_qdPictRef );
  76         m_qdPictRef = NULL;
  77 #endif
  78     }
  79 }
  80
  81 wxMetaFile::wxMetaFile(const wxString& file)
  82 {
  83     m_refData = new wxMetafileRefData;
  84
  85     M_METAFILEDATA->m_metafile = 0;
  86     wxASSERT_MSG( file.empty(), wxT("no file based metafile support yet") );
  87
  88 #if 0
  89     if (!file.IsNull() && (file.Cmp("") == 0))
  90         M_METAFILEDATA->m_metafile = (WXHANDLE) GetMetaFile( file );
  91 #endif
  92 }
  93
  94 wxMetaFile::~wxMetaFile()
  95 {
  96 }
  97
  98 bool wxMetaFile::Ok() const
  99 {
 100     return (M_METAFILEDATA && (M_METAFILEDATA->m_metafile != 0));
 101 }
 102
 103 WXHMETAFILE wxMetaFile::GetHMETAFILE() const
 104 {
 105     return (WXHMETAFILE) M_METAFILEDATA->m_metafile;
 106 }
 107
 108 bool wxMetaFile::SetClipboard(int width, int height)
 109 {
 110     bool success = true;
 111
 112 #if wxUSE_DRAG_AND_DROP
 113     // TODO: to finish this port, we need the data obj first
 114     if (!m_refData)
 115         return false;
 116
 117     bool alreadyOpen = wxTheClipboard->IsOpened();
 118     if (!alreadyOpen)
 119     {
 120         wxTheClipboard->Open();
 121         wxTheClipboard->Clear();
 122     }
 123
 124     wxDataObject *data = new wxMetafileDataObject( *this );
 125     success = wxTheClipboard->SetData( data );
 126     if (!alreadyOpen)
 127         wxTheClipboard->Close();
 128 #endif
 129
 130     return success;
 131 }
 132
 133 void wxMetafile::SetHMETAFILE(WXHMETAFILE mf)
 134 {
 135     UnRef();
 136
 137     m_refData = new wxMetafileRefData;
 138
 139     M_METAFILEDATA->m_metafile = (PicHandle) mf;
 140
 141 #if wxMAC_USE_CORE_GRAPHICS
 142     size_t sz = GetHandleSize( (Handle) M_METAFILEDATA->m_metafile );
 143     wxMemoryBuffer* membuf = new wxMemoryBuffer( sz );
 144     void *data = membuf->GetWriteBuf( sz );
 145     memcpy( data, *M_METAFILEDATA->m_metafile, sz );
 146     membuf->UngetWriteBuf( sz );
 147     CGDataProviderRef provider = CGDataProviderCreateWithData(
 148         membuf, data, sz, wxMacMemoryBufferReleaseProc );
 149     M_METAFILEDATA->m_qdPictRef = NULL;
 150
 151     if ( provider != NULL )
 152     {
 153         M_METAFILEDATA->m_qdPictRef = QDPictCreateWithProvider( provider );
 154         CGDataProviderRelease( provider );
 155     }
 156 #endif
 157 }
 158
 159 bool wxMetaFile::Play(wxDC *dc)
 160 {
 161     if (!m_refData)
 162         return false;
 163
 164     if (!dc->Ok() )
 165         return false;
 166
 167     {
 168 #if wxMAC_USE_CORE_GRAPHICS
 169         QDPictRef cgPictRef = M_METAFILEDATA->m_qdPictRef;
 170         CGContextRef cg = ((wxMacCGContext*)(dc->GetGraphicContext()))->GetNativeContext();
 171         CGRect bounds = QDPictGetBounds( cgPictRef );
 172
 173         CGContextSaveGState( cg );
 174         CGContextTranslateCTM( cg, 0 , bounds.size.width );
 175         CGContextScaleCTM( cg, 1, -1 );
 176         QDPictDrawToCGContext( cg , bounds, cgPictRef );
 177         CGContextRestoreGState( cg );
 178 #else
 179         PicHandle pict = (PicHandle) GetHMETAFILE();
 180         wxMacPortSetter helper( dc );
 181         Rect picFrame ;
 182         DrawPicture( pict , wxMacGetPictureBounds( pict , &picFrame ) );
 183 #endif
 184     }
 185
 186     return true;
 187 }
 188
 189 wxSize wxMetaFile::GetSize() const
 190 {
 191     wxSize size = wxDefaultSize ;
 192
 193     if ( Ok() )
 194     {
 195         PicHandle pict = (PicHandle) GetHMETAFILE() ;
 196         Rect r ;
 197         wxMacGetPictureBounds( pict , &r ) ;
 198         size.x = r.right - r.left ;
 199         size.y = r.bottom - r.top ;
 200     }
 201
 202     return size;
 203 }
 204
 205 // Metafile device context
 206
 207 // New constructor that takes origin and extent. If you use this, don't
 208 // give origin/extent arguments to wxMakeMetaFilePlaceable.
 209
 210 wxMetaFileDC::wxMetaFileDC(const wxString& filename ,
 211                     int width , int height ,
 212                     const wxString& WXUNUSED(description) )
 213 {
 214     wxASSERT_MSG( width == 0 || height == 0 , wxT("no arbitration of metafilesize supported") );
 215     wxASSERT_MSG( filename.empty() , wxT("no file based metafile support yet"));
 216
 217     m_metaFile = new wxMetaFile( filename );
 218
 219 #if wxMAC_USE_CORE_GRAPHICS
 220 #else
 221     Rect r = { 0, 0, height, width };
 222
 223     RectRgn( (RgnHandle) m_macBoundaryClipRgn , &r );
 224     CopyRgn( (RgnHandle) m_macBoundaryClipRgn , (RgnHandle) m_macCurrentClipRgn );
 225
 226     m_metaFile->SetHMETAFILE( (WXHMETAFILE) OpenPicture( &r ) );
 227     ::GetPort( (GrafPtr*) &m_macPort );
 228
 229     m_ok = true ;
 230 #endif
 231
 232     SetMapMode( wxMM_TEXT );
 233 }
 234
 235 wxMetaFileDC::~wxMetaFileDC()
 236 {
 237 }
 238
 239 void wxMetaFileDC::DoGetSize(int *width, int *height) const
 240 {
 241     wxCHECK_RET( m_metaFile , wxT("GetSize() doesn't work without a metafile") );
 242
 243     wxSize sz = m_metaFile->GetSize() ;
 244     if (width)
 245         (*width) = sz.x;
 246     if (height)
 247         (*height) = sz.y;
 248 }
 249
 250 wxMetaFile *wxMetaFileDC::Close()
 251 {
 252     ClosePicture() ;
 253
 254     return m_metaFile;
 255 }
 256
 257 #if wxUSE_DATAOBJ
 258 size_t wxMetafileDataObject::GetDataSize() const
 259 {
 260     return GetHandleSize( (Handle) (*((wxMetafile*)&m_metafile)).GetHMETAFILE() );
 261 }
 262
 263 bool wxMetafileDataObject::GetDataHere(void *buf) const
 264 {
 265     memcpy( buf , (*(PicHandle)(*((wxMetafile*)&m_metafile)).GetHMETAFILE()) ,
 266         GetHandleSize( (Handle) (*((wxMetafile*)&m_metafile)).GetHMETAFILE() ) );
 267
 268     return true;
 269 }
 270
 271 bool wxMetafileDataObject::SetData(size_t len, const void *buf)
 272 {
 273     Handle handle = NewHandle( len );
 274     SetHandleSize( handle, len );
 275     memcpy( *handle, buf, len );
 276     m_metafile.SetHMETAFILE( (WXHMETAFILE) handle );
 277
 278     return true ;
 279 }
 280 #endif
 281
 282 #endif