src/mac/carbon/dcmemory.cpp

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