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