src/osx/carbon/metafile.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/osx/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/osx/private.h"
  28 #include "wx/graphics.h"
  29 #include "wx/osx/metafile.h"
  30
  31 #include <stdio.h>
  32 #include <string.h>
  33
  34 IMPLEMENT_DYNAMIC_CLASS(wxMetafile, wxObject)
  35 IMPLEMENT_ABSTRACT_CLASS(wxMetafileDC, wxDC)
  36 IMPLEMENT_ABSTRACT_CLASS(wxMetafileDCImpl, wxGCDCImpl)
  37
  38 #define M_METAFILEREFDATA( a ) ((wxMetafileRefData*)(a).GetRefData())
  39
  40 class wxMetafileRefData : public wxGDIRefData
  41 {
  42 public:
  43     // default ctor needed for CreateGDIRefData(), must be initialized later
  44     wxMetafileRefData() { Init(); }
  45
  46     // creates a metafile from memory, assumes ownership
  47     wxMetafileRefData(CFDataRef data);
  48
  49     // prepares a recording metafile
  50     wxMetafileRefData( int width, int height);
  51
  52     // prepares a metafile to be read from a file (if filename is not empty)
  53     wxMetafileRefData( const wxString& filename);
  54
  55     virtual ~wxMetafileRefData();
  56
  57     virtual bool IsOk() const { return m_data != NULL; }
  58
  59     void Init();
  60
  61     int GetWidth() const { return m_width; }
  62     int GetHeight() const { return m_height; }
  63
  64     CGPDFDocumentRef GetPDFDocument() const { return m_pdfDoc; }
  65     void UpdateDocumentFromData() ;
  66
  67     const wxCFDataRef& GetData() const { return m_data; }
  68     CGContextRef GetContext() const { return m_context; }
  69
  70     // ends the recording
  71     void Close();
  72 private:
  73     wxCFDataRef m_data;
  74     wxCFRef<CGPDFDocumentRef> m_pdfDoc;
  75     CGContextRef m_context;
  76
  77     int m_width ;
  78     int m_height ;
  79
  80
  81     // Our m_pdfDoc field can't be easily (deep) copied and so we don't define a
  82     // copy ctor.
  83     wxDECLARE_NO_COPY_CLASS(wxMetafileRefData);
  84 };
  85
  86 wxMetafileRefData::wxMetafileRefData(CFDataRef data) :
  87     m_data(data)
  88 {
  89     Init();
  90     UpdateDocumentFromData();
  91 }
  92
  93 wxMetafileRefData::wxMetafileRefData( const wxString& filename )
  94 {
  95     Init();
  96
  97     if ( !filename.empty() )
  98     {
  99         wxCFRef<CFMutableStringRef> cfMutableString(CFStringCreateMutableCopy(NULL, 0, wxCFStringRef(filename)));
 100         CFStringNormalize(cfMutableString,kCFStringNormalizationFormD);
 101         wxCFRef<CFURLRef> url(CFURLCreateWithFileSystemPath(kCFAllocatorDefault, cfMutableString , kCFURLPOSIXPathStyle, false));
 102         m_pdfDoc.reset(CGPDFDocumentCreateWithURL(url));
 103     }
 104 }
 105
 106
 107 wxMetafileRefData::wxMetafileRefData( int width, int height)
 108 {
 109     Init();
 110
 111     m_width = width;
 112     m_height = height;
 113
 114     CGRect r = CGRectMake( 0 , 0 , width  , height );
 115
 116     CFMutableDataRef data = CFDataCreateMutable(kCFAllocatorDefault, 0);
 117     m_data.reset(data);
 118     CGDataConsumerRef dataConsumer = wxMacCGDataConsumerCreateWithCFData(data);
 119     m_context = CGPDFContextCreate( dataConsumer, (width != 0 && height != 0) ? &r : NULL , NULL );
 120     CGDataConsumerRelease( dataConsumer );
 121     if ( m_context )
 122     {
 123         CGPDFContextBeginPage(m_context, NULL);
 124
 125         CGColorSpaceRef genericColorSpace  = wxMacGetGenericRGBColorSpace();
 126
 127         CGContextSetFillColorSpace( m_context, genericColorSpace );
 128         CGContextSetStrokeColorSpace( m_context, genericColorSpace );
 129
 130         CGContextTranslateCTM( m_context , 0 ,  height ) ;
 131         CGContextScaleCTM( m_context , 1 , -1 ) ;
 132     }
 133 }
 134
 135 wxMetafileRefData::~wxMetafileRefData()
 136 {
 137 }
 138
 139 void wxMetafileRefData::Init()
 140 {
 141     m_context = NULL;
 142     m_width = -1;
 143     m_height = -1;
 144 }
 145
 146 void wxMetafileRefData::Close()
 147 {
 148     CGPDFContextEndPage(m_context);
 149
 150     CGContextRelease(m_context);
 151     m_context = NULL;
 152
 153     UpdateDocumentFromData();
 154 }
 155
 156 void wxMetafileRefData::UpdateDocumentFromData()
 157 {
 158     wxCFRef<CGDataProviderRef> provider(wxMacCGDataProviderCreateWithCFData(m_data));
 159     m_pdfDoc.reset(CGPDFDocumentCreateWithProvider(provider));
 160     if ( m_pdfDoc != NULL )
 161     {
 162         CGPDFPageRef page = CGPDFDocumentGetPage( m_pdfDoc, 1 );
 163         CGRect rect = CGPDFPageGetBoxRect ( page, kCGPDFMediaBox);
 164         m_width = static_cast<int>(rect.size.width);
 165         m_height = static_cast<int>(rect.size.height);
 166     }
 167 }
 168
 169 wxMetaFile::wxMetaFile(const wxString& file)
 170 {
 171     m_refData = new wxMetafileRefData(file);
 172 }
 173
 174 wxMetaFile::~wxMetaFile()
 175 {
 176 }
 177
 178 wxGDIRefData *wxMetaFile::CreateGDIRefData() const
 179 {
 180     return new wxMetafileRefData;
 181 }
 182
 183 wxGDIRefData *
 184 wxMetaFile::CloneGDIRefData(const wxGDIRefData * WXUNUSED(data)) const
 185 {
 186     wxFAIL_MSG( wxS("Cloning metafiles is not implemented in wxCarbon.") );
 187
 188     return new wxMetafileRefData;
 189 }
 190
 191 WXHMETAFILE wxMetaFile::GetHMETAFILE() const
 192 {
 193     return (WXHMETAFILE) (CFDataRef) M_METAFILEDATA->GetData();
 194 }
 195
 196 bool wxMetaFile::SetClipboard(int WXUNUSED(width), int WXUNUSED(height))
 197 {
 198     bool success = true;
 199
 200 #if wxUSE_DRAG_AND_DROP
 201     if (m_refData == NULL)
 202         return false;
 203
 204     bool alreadyOpen = wxTheClipboard->IsOpened();
 205     if (!alreadyOpen)
 206     {
 207         wxTheClipboard->Open();
 208         wxTheClipboard->Clear();
 209     }
 210
 211     wxDataObject *data = new wxMetafileDataObject( *this );
 212     success = wxTheClipboard->SetData( data );
 213     if (!alreadyOpen)
 214         wxTheClipboard->Close();
 215 #endif
 216
 217     return success;
 218 }
 219
 220 void wxMetafile::SetHMETAFILE(WXHMETAFILE mf)
 221 {
 222     UnRef();
 223
 224     m_refData = new wxMetafileRefData((CFDataRef)mf);
 225 }
 226
 227 bool wxMetaFile::Play(wxDC *dc)
 228 {
 229     if (!m_refData)
 230         return false;
 231
 232     if (!dc->IsOk())
 233         return false;
 234
 235     {
 236         wxDCImpl *impl = dc->GetImpl();
 237         wxGCDCImpl *gc_impl = wxDynamicCast(impl, wxGCDCImpl);
 238         if (gc_impl)
 239         {
 240             CGContextRef cg = (CGContextRef) (gc_impl->GetGraphicsContext()->GetNativeContext());
 241             CGPDFDocumentRef doc = M_METAFILEDATA->GetPDFDocument();
 242             CGPDFPageRef page = CGPDFDocumentGetPage( doc, 1 );
 243             wxMacCGContextStateSaver save(cg);
 244             CGContextDrawPDFPage( cg, page );
 245         }
 246 //        CGContextTranslateCTM( cg, 0, bounds.size.width );
 247 //        CGContextScaleCTM( cg, 1, -1 );
 248     }
 249
 250     return true;
 251 }
 252
 253 wxSize wxMetaFile::GetSize() const
 254 {
 255     wxSize dataSize = wxDefaultSize;
 256
 257     if (IsOk())
 258     {
 259         dataSize.x = M_METAFILEDATA->GetWidth();
 260         dataSize.y = M_METAFILEDATA->GetHeight();
 261     }
 262
 263     return dataSize;
 264 }
 265
 266 // Metafile device context
 267
 268 // New constructor that takes origin and extent. If you use this, don't
 269 // give origin/extent arguments to wxMakeMetaFilePlaceable.
 270
 271 wxMetafileDCImpl::wxMetafileDCImpl(
 272     wxDC *owner,
 273     const wxString& filename,
 274     int width, int height,
 275     const wxString& WXUNUSED(description) ) :
 276     wxGCDCImpl( owner )
 277 {
 278     wxASSERT_MSG( width != 0 || height != 0, wxT("no arbitration of metafile size supported") );
 279     wxASSERT_MSG( filename.empty(), wxT("no file based metafile support yet"));
 280
 281     m_metaFile = new wxMetaFile( filename );
 282     wxMetafileRefData* metafiledata = new wxMetafileRefData(width, height);
 283     m_metaFile->UnRef();
 284     m_metaFile->SetRefData( metafiledata );
 285
 286     SetGraphicsContext( wxGraphicsContext::CreateFromNative(metafiledata->GetContext()));
 287     m_ok = (m_graphicContext != NULL) ;
 288
 289     SetMapMode( wxMM_TEXT );
 290 }
 291
 292 wxMetafileDCImpl::~wxMetafileDCImpl()
 293 {
 294 }
 295
 296 void wxMetafileDCImpl::DoGetSize(int *width, int *height) const
 297 {
 298     wxCHECK_RET( m_metaFile, wxT("GetSize() doesn't work without a metafile") );
 299
 300     wxSize sz = m_metaFile->GetSize();
 301     if (width)
 302         (*width) = sz.x;
 303     if (height)
 304         (*height) = sz.y;
 305 }
 306
 307 wxMetaFile *wxMetafileDCImpl::Close()
 308 {
 309     wxDELETE(m_graphicContext);
 310     m_ok = false;
 311
 312     M_METAFILEREFDATA(*m_metaFile)->Close();
 313
 314     return m_metaFile;
 315 }
 316
 317 #if wxUSE_DATAOBJ
 318 size_t wxMetafileDataObject::GetDataSize() const
 319 {
 320     CFIndex length = 0;
 321     wxMetafileRefData* refData = M_METAFILEREFDATA(m_metafile);
 322     if ( refData )
 323         length = refData->GetData().GetLength();
 324     return length;
 325 }
 326
 327 bool wxMetafileDataObject::GetDataHere(void *buf) const
 328 {
 329     bool result = false;
 330
 331     wxMetafileRefData* refData = M_METAFILEREFDATA(m_metafile);
 332     if ( refData )
 333     {
 334         CFIndex length = refData->GetData().GetLength();
 335         if ( length > 0 )
 336         {
 337             result = true ;
 338             refData->GetData().GetBytes(CFRangeMake(0,length), (UInt8 *) buf);
 339         }
 340     }
 341     return result;
 342 }
 343
 344 bool wxMetafileDataObject::SetData(size_t len, const void *buf)
 345 {
 346     wxMetafileRefData* metafiledata = new wxMetafileRefData(wxCFRefFromGet(wxCFDataRef((UInt8*)buf, len).get()));
 347     m_metafile.UnRef();
 348     m_metafile.SetRefData( metafiledata );
 349     return true;
 350 }
 351 #endif
 352
 353 #endif