src/mac/carbon/metafile.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/mac/carbon/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 // Currently, the only purpose for making a metafile
  13 // is to put it on the clipboard.
  14
  15
  16 #include "wx/wxprec.h"
  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 #include "wx/graphics.h"
  29
  30 #include <stdio.h>
  31 #include <string.h>
  32
  33 IMPLEMENT_DYNAMIC_CLASS(wxMetafile, wxObject)
  34 IMPLEMENT_ABSTRACT_CLASS(wxMetafileDC, wxDC)
  35
  36 class wxMetafileRefData: public wxGDIRefData
  37 {
  38     friend class WXDLLEXPORT wxMetafile;
  39
  40 public:
  41     wxMetafileRefData();
  42     virtual ~wxMetafileRefData();
  43
  44 private:
  45     PicHandle m_metafile;
  46
  47 #if wxMAC_USE_CORE_GRAPHICS
  48     QDPictRef m_qdPictRef;
  49 #endif
  50 };
  51
  52 wxMetafileRefData::wxMetafileRefData()
  53 {
  54     m_metafile = NULL;
  55
  56 #if wxMAC_USE_CORE_GRAPHICS
  57     m_qdPictRef = NULL;
  58 #endif
  59 }
  60
  61 wxMetafileRefData::~wxMetafileRefData()
  62 {
  63     if (m_metafile)
  64     {
  65 #ifndef __LP64__
  66         KillPicture( (PicHandle)m_metafile );
  67         m_metafile = NULL;
  68
  69 #if wxMAC_USE_CORE_GRAPHICS
  70         QDPictRelease( m_qdPictRef );
  71         m_qdPictRef = NULL;
  72 #endif
  73 #endif
  74     }
  75 }
  76
  77 wxMetaFile::wxMetaFile(const wxString& file)
  78 {
  79     m_refData = new wxMetafileRefData;
  80
  81     M_METAFILEDATA->m_metafile = NULL;
  82     wxASSERT_MSG( file.empty(), wxT("no file-based metafile support yet") );
  83
  84 #if 0
  85     if (!file.IsNull() && (file.Cmp("") == 0))
  86         M_METAFILEDATA->m_metafile = (WXHANDLE) GetMetaFile( file );
  87 #endif
  88 }
  89
  90 wxMetaFile::~wxMetaFile()
  91 {
  92 }
  93
  94 bool wxMetaFile::IsOk() const
  95 {
  96     return (M_METAFILEDATA && (M_METAFILEDATA->m_metafile != NULL));
  97 }
  98
  99 WXHMETAFILE wxMetaFile::GetHMETAFILE() const
 100 {
 101     return (WXHMETAFILE) M_METAFILEDATA->m_metafile;
 102 }
 103
 104 bool wxMetaFile::SetClipboard(int width, int height)
 105 {
 106     bool success = true;
 107
 108 #if wxUSE_DRAG_AND_DROP
 109     // TODO: to finish this port, we need the data object first
 110     if (m_refData == NULL)
 111         return false;
 112
 113     bool alreadyOpen = wxTheClipboard->IsOpened();
 114     if (!alreadyOpen)
 115     {
 116         wxTheClipboard->Open();
 117         wxTheClipboard->Clear();
 118     }
 119
 120     wxDataObject *data = new wxMetafileDataObject( *this );
 121     success = wxTheClipboard->SetData( data );
 122     if (!alreadyOpen)
 123         wxTheClipboard->Close();
 124 #endif
 125
 126     return success;
 127 }
 128
 129 void wxMetafile::SetHMETAFILE(WXHMETAFILE mf)
 130 {
 131     UnRef();
 132
 133     m_refData = new wxMetafileRefData;
 134
 135     M_METAFILEDATA->m_metafile = (PicHandle)mf;
 136
 137 #if wxMAC_USE_CORE_GRAPHICS
 138     size_t sz = GetHandleSize( (Handle) M_METAFILEDATA->m_metafile );
 139     wxMemoryBuffer* membuf = new wxMemoryBuffer( sz );
 140     void *data = membuf->GetWriteBuf( sz );
 141
 142     memcpy( data, *M_METAFILEDATA->m_metafile, sz );
 143     membuf->UngetWriteBuf( sz );
 144     CGDataProviderRef provider = CGDataProviderCreateWithData(
 145         membuf, data, sz, wxMacMemoryBufferReleaseProc );
 146     M_METAFILEDATA->m_qdPictRef = NULL;
 147
 148 #ifndef __LP64__
 149     if (provider != NULL)
 150     {
 151         M_METAFILEDATA->m_qdPictRef = QDPictCreateWithProvider( provider );
 152         CGDataProviderRelease( provider );
 153     }
 154 #endif
 155 #endif
 156 }
 157
 158 bool wxMetaFile::Play(wxDC *dc)
 159 {
 160     if (!m_refData)
 161         return false;
 162
 163     if (!dc->Ok())
 164         return false;
 165
 166     {
 167 #if wxMAC_USE_CORE_GRAPHICS
 168 #ifndef __LP64__
 169         QDPictRef cgPictRef = M_METAFILEDATA->m_qdPictRef;
 170         CGContextRef cg = (CGContextRef) dc->GetGraphicsContext()->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 #endif
 179 #else
 180         PicHandle pict = (PicHandle)GetHMETAFILE();
 181         wxMacPortSetter helper( dc );
 182         Rect picFrame;
 183         DrawPicture( pict, wxMacGetPictureBounds( pict, &picFrame ) );
 184 #endif
 185     }
 186
 187     return true;
 188 }
 189
 190 wxSize wxMetaFile::GetSize() const
 191 {
 192     wxSize dataSize = wxDefaultSize;
 193
 194     if (Ok())
 195     {
 196 #ifndef __LP64__
 197        PicHandle pict = (PicHandle)GetHMETAFILE();
 198         Rect r;
 199         wxMacGetPictureBounds( pict, &r );
 200         dataSize.x = r.right - r.left;
 201         dataSize.y = r.bottom - r.top;
 202 #endif
 203     }
 204
 205     return dataSize;
 206 }
 207
 208 // Metafile device context
 209
 210 // New constructor that takes origin and extent. If you use this, don't
 211 // give origin/extent arguments to wxMakeMetaFilePlaceable.
 212
 213 wxMetaFileDC::wxMetaFileDC(
 214     const wxString& filename,
 215     int width, int height,
 216     const wxString& WXUNUSED(description) )
 217 {
 218     wxASSERT_MSG( width != 0 || height != 0, wxT("no arbitration of metafile size supported") );
 219     wxASSERT_MSG( filename.empty(), wxT("no file based metafile support yet"));
 220
 221     m_metaFile = new wxMetaFile( filename );
 222
 223 #if wxMAC_USE_CORE_GRAPHICS
 224 #else
 225     Rect r = { 0, 0, height, width };
 226
 227     RectRgn( (RgnHandle)m_macBoundaryClipRgn, &r );
 228     CopyRgn( (RgnHandle)m_macBoundaryClipRgn, (RgnHandle)m_macCurrentClipRgn );
 229
 230     m_metaFile->SetHMETAFILE( (WXHMETAFILE)OpenPicture( &r ) );
 231     ::GetPort( (GrafPtr*)&m_macPort );
 232
 233     m_ok = true;
 234 #endif
 235
 236     SetMapMode( wxMM_TEXT );
 237 }
 238
 239 wxMetaFileDC::~wxMetaFileDC()
 240 {
 241 }
 242
 243 void wxMetaFileDC::DoGetSize(int *width, int *height) const
 244 {
 245     wxCHECK_RET( m_metaFile, wxT("GetSize() doesn't work without a metafile") );
 246
 247     wxSize sz = m_metaFile->GetSize();
 248     if (width)
 249         (*width) = sz.x;
 250     if (height)
 251         (*height) = sz.y;
 252 }
 253
 254 wxMetaFile *wxMetaFileDC::Close()
 255 {
 256 #ifndef __LP64__
 257     ClosePicture();
 258 #endif
 259     return m_metaFile;
 260 }
 261
 262 #if wxUSE_DATAOBJ
 263 size_t wxMetafileDataObject::GetDataSize() const
 264 {
 265     return GetHandleSize( (Handle) (*((wxMetafile*)&m_metafile)).GetHMETAFILE() );
 266 }
 267
 268 bool wxMetafileDataObject::GetDataHere(void *buf) const
 269 {
 270     Handle pictH = (Handle)(*((wxMetafile*)&m_metafile)).GetHMETAFILE();
 271     bool result = (pictH != NULL);
 272
 273     if (result)
 274         memcpy( buf, *pictH, GetHandleSize( pictH ) );
 275
 276     return result;
 277 }
 278
 279 bool wxMetafileDataObject::SetData(size_t len, const void *buf)
 280 {
 281     Handle handle = NewHandle( len );
 282     SetHandleSize( handle, len );
 283     memcpy( *handle, buf, len );
 284     m_metafile.SetHMETAFILE( (WXHMETAFILE) handle );
 285
 286     return true;
 287 }
 288 #endif
 289
 290 #endif