src/mac/carbon/dcmemory.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        dcmemory.cpp
   3 // Purpose:     wxMemoryDC class
   4 // Author:      Stefan Csomor
   5 // Modified by:
   6 // Created:     01/02/97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Stefan Csomor
   9 // Licence:       wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #include "wx/wxprec.h"
  13
  14 #include "wx/dcmemory.h"
  15 #include "wx/mac/private.h"
  16
  17 //-----------------------------------------------------------------------------
  18 // wxMemoryDC
  19 //-----------------------------------------------------------------------------
  20
  21 IMPLEMENT_DYNAMIC_CLASS(wxMemoryDC,wxPaintDC)
  22
  23 wxMemoryDC::wxMemoryDC(void)
  24 : m_selected()
  25 {
  26     m_ok = TRUE;
  27     SetBackground(*wxWHITE_BRUSH);
  28     SetBrush(*wxWHITE_BRUSH);
  29     SetPen(*wxBLACK_PEN);
  30     SetFont(*wxNORMAL_FONT) ;
  31     m_ok = FALSE;
  32 };
  33
  34 wxMemoryDC::wxMemoryDC( wxDC *WXUNUSED(dc) )
  35 : m_selected()
  36 {
  37     m_ok = TRUE;
  38     SetBackground(*wxWHITE_BRUSH);
  39     SetBrush(*wxWHITE_BRUSH);
  40     SetPen(*wxBLACK_PEN);
  41     SetFont(*wxNORMAL_FONT) ;
  42     m_ok = FALSE;
  43 };
  44
  45 wxMemoryDC::~wxMemoryDC()
  46 {
  47     if ( m_selected.Ok() )
  48     {
  49 #if wxMAC_USE_CORE_GRAPHICS
  50         m_selected.EndRawAccess() ;
  51         CGContextRef bmCtx = ((wxMacCGContext*)(m_graphicContext))->GetNativeContext() ;
  52         delete m_graphicContext ;
  53         m_graphicContext = NULL ;
  54         CGContextRelease( bmCtx ) ;
  55 #else
  56 // TODO        UnlockPixels( GetGWorldPixMap(MAC_WXHBITMAP(m_selected.GetHBITMAP())) );
  57 #endif
  58     }
  59 };
  60
  61 void wxMemoryDC::SelectObject( const wxBitmap& bitmap )
  62 {
  63     if ( m_selected.Ok() )
  64     {
  65 #if wxMAC_USE_CORE_GRAPHICS
  66         m_selected.EndRawAccess() ;
  67         CGContextRef bmCtx = ((wxMacCGContext*)(m_graphicContext))->GetNativeContext() ;
  68         delete m_graphicContext ;
  69         m_graphicContext = NULL ;
  70         CGContextRelease( bmCtx ) ;
  71 #else
  72 // TODO        UnlockPixels( GetGWorldPixMap(MAC_WXHBITMAP(m_selected.GetHBITMAP())) );
  73 #endif
  74     }
  75     m_selected = bitmap;
  76     if (m_selected.Ok())
  77     {
  78 #if wxMAC_USE_CORE_GRAPHICS
  79         m_selected.UseAlpha() ;
  80         void * data = m_selected.BeginRawAccess() ;
  81
  82         int bitsPerComp = 8 ;
  83         int bytesPerPixel = 4 ;
  84         int w = bitmap.GetWidth() ;
  85         int h = bitmap.GetHeight() ;
  86         CGImageAlphaInfo a = kCGImageAlphaNoneSkipFirst ;
  87         CGColorSpaceRef genericColorSpace  = wxMacGetGenericRGBColorSpace();
  88         CGContextRef bmCtx = CGBitmapContextCreate(data , w, h, bitsPerComp , bytesPerPixel * w , genericColorSpace, a);
  89         wxASSERT_MSG( bmCtx , wxT("Unable to create bitmap context") ) ;
  90
  91         CGContextSetFillColorSpace(bmCtx, genericColorSpace);
  92         CGContextSetStrokeColorSpace(bmCtx, genericColorSpace);
  93
  94         if( bmCtx )
  95         {
  96             CGContextTranslateCTM( bmCtx , 0 ,  m_selected.GetHeight() ) ;
  97             CGContextScaleCTM( bmCtx , 1 , -1 ) ;
  98             m_graphicContext = new wxMacCGContext( bmCtx ) ;
  99             m_graphicContext->SetPen( m_pen ) ;
 100             m_graphicContext->SetBrush( m_brush ) ;
 101         }
 102         m_ok = (m_graphicContext != NULL) ;
 103 #else
 104         if ( ( m_macPort = m_selected.GetHBITMAP( &m_macMask ) ) != NULL )
 105         {
 106             LockPixels( GetGWorldPixMap(  (CGrafPtr)  m_macPort ) ) ;
 107             /*
 108             wxMask * mask = bitmap.GetMask() ;
 109             if ( mask )
 110             {
 111                 m_macMask = mask->GetHBITMAP() ;
 112             }
 113             */
 114             SetRectRgn( (RgnHandle) m_macBoundaryClipRgn , 0 , 0 , m_selected.GetWidth() , m_selected.GetHeight() ) ;
 115             CopyRgn( (RgnHandle) m_macBoundaryClipRgn ,(RgnHandle)  m_macCurrentClipRgn ) ;
 116             m_ok = TRUE ;
 117         }
 118         else
 119         {
 120             m_ok = FALSE;
 121         }
 122 #endif
 123     }
 124     else
 125     {
 126         m_ok = FALSE;
 127     }
 128 }
 129
 130 void wxMemoryDC::DoGetSize( int *width, int *height ) const
 131 {
 132     if (m_selected.Ok())
 133     {
 134         if (width) (*width) = m_selected.GetWidth();
 135         if (height) (*height) = m_selected.GetHeight();
 136     }
 137     else
 138     {
 139         if (width) (*width) = 0;
 140         if (height) (*height) = 0;
 141     }
 142 }
 143
 144