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 // Copyright:   (c) Stefan Csomor
   8 // Licence:       wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10 //
  11 // Currently, the only purpose for making a metafile
  12 // is to put it on the clipboard.
  13
  14
  15 #include "wx/wxprec.h"
  16
  17 #if wxUSE_METAFILE
  18
  19 #ifndef WX_PRECOMP
  20     #include "wx/utils.h"
  21     #include "wx/app.h"
  22 #endif
  23
  24 #include "wx/metafile.h"
  25 #include "wx/clipbrd.h"
  26 #include "wx/osx/private.h"
  27 #include "wx/graphics.h"
  28 #include "wx/osx/metafile.h"
  29
  30 #include <stdio.h>
  31 #include <string.h>
  32
  33 IMPLEMENT_DYNAMIC_CLASS(wxMetafile, wxObject)
  34 IMPLEMENT_ABSTRACT_CLASS(wxMetafileDC, wxDC)
  35 IMPLEMENT_ABSTRACT_CLASS(wxMetafileDCImpl, wxGCDCImpl)
  36
  37 #define M_METAFILEREFDATA( a ) ((wxMetafileRefData*)(a).GetRefData())
  38
  39 class wxMetafileRefData : public wxGDIRefData
  40 {
  41 public:
  42     // default ctor needed for CreateGDIRefData(), must be initialized later
  43     wxMetafileRefData() { Init(); }
  44
  45     // creates a metafile from memory, assumes ownership
  46     wxMetafileRefData(CFDataRef data);
  47
  48     // prepares a recording metafile
  49     wxMetafileRefData( int width, int height);
  50
  51     // prepares a metafile to be read from a file (if filename is not empty)
  52     wxMetafileRefData( const wxString& filename);
  53
  54     virtual ~wxMetafileRefData();
  55
  56     virtual bool IsOk() const { return m_data != NULL; }
  57
  58     void Init();
  59
  60     int GetWidth() const { return m_width; }
  61     int GetHeight() const { return m_height; }
  62
  63     CGPDFDocumentRef GetPDFDocument() const { return m_pdfDoc; }
  64     void UpdateDocumentFromData() ;
  65
  66     const wxCFDataRef& GetData() const { return m_data; }
  67     CGContextRef GetContext() const { return m_context; }
  68
  69     // ends the recording
  70     void Close();
  71 private:
  72     wxCFDataRef m_data;
  73     wxCFRef<CGPDFDocumentRef> m_pdfDoc;
  74     CGContextRef m_context;
  75
  76     int m_width ;
  77     int m_height ;
  78
  79
  80     // Our m_pdfDoc field can't be easily (deep) copied and so we don't define a
  81     // copy ctor.
  82     wxDECLARE_NO_COPY_CLASS(wxMetafileRefData);
  83 };
  84
  85 wxMetafileRefData::wxMetafileRefData(CFDataRef data) :
  86     m_data(data)
  87 {
  88     Init();
  89     UpdateDocumentFromData();
  90 }
  91
  92 wxMetafileRefData::wxMetafileRefData( const wxString& filename )
  93 {
  94     Init();
  95
  96     if ( !filename.empty() )
  97     {
  98         wxCFRef<CFMutableStringRef> cfMutableString(CFStringCreateMutableCopy(NULL, 0, wxCFStringRef(filename)));
  99         CFStringNormalize(cfMutableString,kCFStringNormalizationFormD);
 100         wxCFRef<CFURLRef> url(CFURLCreateWithFileSystemPath(kCFAllocatorDefault, cfMutableString , kCFURLPOSIXPathStyle, false));
 101         m_pdfDoc.reset(CGPDFDocumentCreateWithURL(url));
 102     }
 103 }
 104
 105
 106 wxMetafileRefData::wxMetafileRefData( int width, int height)
 107 {
 108     Init();
 109
 110     m_width = width;
 111     m_height = height;
 112
 113     CGRect r = CGRectMake( 0 , 0 , width  , height );
 114
 115     CFMutableDataRef data = CFDataCreateMutable(kCFAllocatorDefault, 0);
 116     m_data.reset(data);
 117     CGDataConsumerRef dataConsumer = wxMacCGDataConsumerCreateWithCFData(data);
 118     m_context = CGPDFContextCreate( dataConsumer, (width != 0 && height != 0) ? &r : NULL , NULL );
 119     CGDataConsumerRelease( dataConsumer );
 120     if ( m_context )
 121     {
 122         CGPDFContextBeginPage(m_context, NULL);
 123
 124         CGColorSpaceRef genericColorSpace  = wxMacGetGenericRGBColorSpace();
 125
 126         CGContextSetFillColorSpace( m_context, genericColorSpace );
 127         CGContextSetStrokeColorSpace( m_context, genericColorSpace );
 128
 129         CGContextTranslateCTM( m_context , 0 ,  height ) ;
 130         CGContextScaleCTM( m_context , 1 , -1 ) ;
 131     }
 132 }
 133
 134 wxMetafileRefData::~wxMetafileRefData()
 135 {
 136 }
 137
 138 void wxMetafileRefData::Init()
 139 {
 140     m_context = NULL;
 141     m_width = -1;
 142     m_height = -1;
 143 }
 144
 145 void wxMetafileRefData::Close()
 146 {
 147     CGPDFContextEndPage(m_context);
 148
 149     CGContextRelease(m_context);
 150     m_context = NULL;
 151
 152     UpdateDocumentFromData();
 153 }
 154
 155 void wxMetafileRefData::UpdateDocumentFromData()
 156 {
 157     wxCFRef<CGDataProviderRef> provider(wxMacCGDataProviderCreateWithCFData(m_data));
 158     m_pdfDoc.reset(CGPDFDocumentCreateWithProvider(provider));
 159     if ( m_pdfDoc != NULL )
 160     {
 161         CGPDFPageRef page = CGPDFDocumentGetPage( m_pdfDoc, 1 );
 162         CGRect rect = CGPDFPageGetBoxRect ( page, kCGPDFMediaBox);
 163         m_width = static_cast<int>(rect.size.width);
 164         m_height = static_cast<int>(rect.size.height);
 165     }
 166 }
 167
 168 wxMetaFile::wxMetaFile(const wxString& file)
 169 {
 170     m_refData = new wxMetafileRefData(file);
 171 }
 172
 173 wxMetaFile::~wxMetaFile()
 174 {
 175 }
 176
 177 wxGDIRefData *wxMetaFile::CreateGDIRefData() const
 178 {
 179     return new wxMetafileRefData;
 180 }
 181
 182 wxGDIRefData *
 183 wxMetaFile::CloneGDIRefData(const wxGDIRefData * WXUNUSED(data)) const
 184 {
 185     wxFAIL_MSG( wxS("Cloning metafiles is not implemented in wxCarbon.") );
 186
 187     return new wxMetafileRefData;
 188 }
 189
 190 WXHMETAFILE wxMetaFile::GetHMETAFILE() const
 191 {
 192     return (WXHMETAFILE) (CFDataRef) M_METAFILEDATA->GetData();
 193 }
 194
 195 bool wxMetaFile::SetClipboard(int WXUNUSED(width), int WXUNUSED(height))
 196 {
 197     bool success = true;
 198
 199 #if wxUSE_DRAG_AND_DROP
 200     if (m_refData == NULL)
 201         return false;
 202
 203     bool alreadyOpen = wxTheClipboard->IsOpened();
 204     if (!alreadyOpen)
 205     {
 206         wxTheClipboard->Open();
 207         wxTheClipboard->Clear();
 208     }
 209
 210     wxDataObject *data = new wxMetafileDataObject( *this );
 211     success = wxTheClipboard->SetData( data );
 212     if (!alreadyOpen)
 213         wxTheClipboard->Close();
 214 #endif
 215
 216     return success;
 217 }
 218
 219 void wxMetafile::SetHMETAFILE(WXHMETAFILE mf)
 220 {
 221     UnRef();
 222
 223     m_refData = new wxMetafileRefData((CFDataRef)mf);
 224 }
 225
 226 bool wxMetaFile::Play(wxDC *dc)
 227 {
 228     if (!m_refData)
 229         return false;
 230
 231     if (!dc->IsOk())
 232         return false;
 233
 234     {
 235         wxDCImpl *impl = dc->GetImpl();
 236         wxGCDCImpl *gc_impl = wxDynamicCast(impl, wxGCDCImpl);
 237         if (gc_impl)
 238         {
 239             CGContextRef cg = (CGContextRef) (gc_impl->GetGraphicsContext()->GetNativeContext());
 240             CGPDFDocumentRef doc = M_METAFILEDATA->GetPDFDocument();
 241             CGPDFPageRef page = CGPDFDocumentGetPage( doc, 1 );
 242             wxMacCGContextStateSaver save(cg);
 243             CGContextDrawPDFPage( cg, page );
 244         }
 245 //        CGContextTranslateCTM( cg, 0, bounds.size.width );
 246 //        CGContextScaleCTM( cg, 1, -1 );
 247     }
 248
 249     return true;
 250 }
 251
 252 wxSize wxMetaFile::GetSize() const
 253 {
 254     wxSize dataSize = wxDefaultSize;
 255
 256     if (IsOk())
 257     {
 258         dataSize.x = M_METAFILEDATA->GetWidth();
 259         dataSize.y = M_METAFILEDATA->GetHeight();
 260     }
 261
 262     return dataSize;
 263 }
 264
 265 // Metafile device context
 266
 267 // New constructor that takes origin and extent. If you use this, don't
 268 // give origin/extent arguments to wxMakeMetaFilePlaceable.
 269
 270 wxMetafileDCImpl::wxMetafileDCImpl(
 271     wxDC *owner,
 272     const wxString& filename,
 273     int width, int height,
 274     const wxString& WXUNUSED(description) ) :
 275     wxGCDCImpl( owner )
 276 {
 277     wxASSERT_MSG( width != 0 || height != 0, wxT("no arbitration of metafile size supported") );
 278     wxASSERT_MSG( filename.empty(), wxT("no file based metafile support yet"));
 279
 280     m_metaFile = new wxMetaFile( filename );
 281     wxMetafileRefData* metafiledata = new wxMetafileRefData(width, height);
 282     m_metaFile->UnRef();
 283     m_metaFile->SetRefData( metafiledata );
 284
 285     SetGraphicsContext( wxGraphicsContext::CreateFromNative(metafiledata->GetContext()));
 286     m_ok = (m_graphicContext != NULL) ;
 287
 288     SetMapMode( wxMM_TEXT );
 289 }
 290
 291 wxMetafileDCImpl::~wxMetafileDCImpl()
 292 {
 293 }
 294
 295 void wxMetafileDCImpl::DoGetSize(int *width, int *height) const
 296 {
 297     wxCHECK_RET( m_metaFile, wxT("GetSize() doesn't work without a metafile") );
 298
 299     wxSize sz = m_metaFile->GetSize();
 300     if (width)
 301         (*width) = sz.x;
 302     if (height)
 303         (*height) = sz.y;
 304 }
 305
 306 wxMetaFile *wxMetafileDCImpl::Close()
 307 {
 308     wxDELETE(m_graphicContext);
 309     m_ok = false;
 310
 311     M_METAFILEREFDATA(*m_metaFile)->Close();
 312
 313     return m_metaFile;
 314 }
 315
 316 #if wxUSE_DATAOBJ
 317 size_t wxMetafileDataObject::GetDataSize() const
 318 {
 319     CFIndex length = 0;
 320     wxMetafileRefData* refData = M_METAFILEREFDATA(m_metafile);
 321     if ( refData )
 322         length = refData->GetData().GetLength();
 323     return length;
 324 }
 325
 326 bool wxMetafileDataObject::GetDataHere(void *buf) const
 327 {
 328     bool result = false;
 329
 330     wxMetafileRefData* refData = M_METAFILEREFDATA(m_metafile);
 331     if ( refData )
 332     {
 333         CFIndex length = refData->GetData().GetLength();
 334         if ( length > 0 )
 335         {
 336             result = true ;
 337             refData->GetData().GetBytes(CFRangeMake(0,length), (UInt8 *) buf);
 338         }
 339     }
 340     return result;
 341 }
 342
 343 bool wxMetafileDataObject::SetData(size_t len, const void *buf)
 344 {
 345     wxMetafileRefData* metafiledata = new wxMetafileRefData(wxCFRefFromGet(wxCFDataRef((UInt8*)buf, len).get()));
 346     m_metafile.UnRef();
 347     m_metafile.SetRefData( metafiledata );
 348     return true;
 349 }
 350 #endif
 351
 352 #endif