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 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  13 #pragma implementation "dcmemory.h"
  14 #endif
  15
  16 #include "wx/wxprec.h"
  17
  18 #include "wx/dcmemory.h"
  19 #include "wx/mac/private.h"
  20
  21 //-----------------------------------------------------------------------------
  22 // wxMemoryDC
  23 //-----------------------------------------------------------------------------
  24
  25 IMPLEMENT_DYNAMIC_CLASS(wxMemoryDC,wxPaintDC)
  26
  27 wxMemoryDC::wxMemoryDC(void)
  28 : m_selected()
  29 {
  30     m_ok = TRUE;
  31     SetBackground(*wxWHITE_BRUSH);
  32     SetBrush(*wxWHITE_BRUSH);
  33     SetPen(*wxBLACK_PEN);
  34     SetFont(*wxNORMAL_FONT) ;
  35     m_ok = FALSE;
  36 };
  37
  38 wxMemoryDC::wxMemoryDC( wxDC *WXUNUSED(dc) )
  39 : m_selected()
  40 {
  41     m_ok = TRUE;
  42     SetBackground(*wxWHITE_BRUSH);
  43     SetBrush(*wxWHITE_BRUSH);
  44     SetPen(*wxBLACK_PEN);
  45     SetFont(*wxNORMAL_FONT) ;
  46     m_ok = FALSE;
  47 };
  48
  49 wxMemoryDC::~wxMemoryDC()
  50 {
  51     if ( m_selected.Ok() )
  52     {
  53 #if wxMAC_USE_CORE_GRAPHICS
  54         m_selected.EndRawAccess() ;
  55         CGContextRef bmCtx = dynamic_cast<wxMacCGContext*>(m_graphicContext)->GetNativeContext() ;
  56         delete m_graphicContext ;
  57         m_graphicContext = NULL ;
  58         CGContextRelease( bmCtx ) ;
  59 #else
  60 // TODO        UnlockPixels( GetGWorldPixMap(MAC_WXHBITMAP(m_selected.GetHBITMAP())) );
  61 #endif
  62     }
  63 };
  64
  65 void wxMemoryDC::SelectObject( const wxBitmap& bitmap )
  66 {
  67     if ( m_selected.Ok() )
  68     {
  69 #if wxMAC_USE_CORE_GRAPHICS
  70         m_selected.EndRawAccess() ;
  71         CGContextRef bmCtx = dynamic_cast<wxMacCGContext*>(m_graphicContext)->GetNativeContext() ;
  72         delete m_graphicContext ;
  73         m_graphicContext = NULL ;
  74         CGContextRelease( bmCtx ) ;
  75 #else
  76 // TODO        UnlockPixels( GetGWorldPixMap(MAC_WXHBITMAP(m_selected.GetHBITMAP())) );
  77 #endif
  78     }
  79     m_selected = bitmap;
  80     if (m_selected.Ok())
  81     {
  82 #if wxMAC_USE_CORE_GRAPHICS
  83         m_selected.UseAlpha() ;
  84         void * data = m_selected.BeginRawAccess() ;
  85
  86         int bitsPerComp = 8 ;
  87         int bytesPerPixel = 4 ;
  88         int w = bitmap.GetWidth() ;
  89         int h = bitmap.GetHeight() ;
  90         CGImageAlphaInfo a = kCGImageAlphaNoneSkipFirst ;
  91         CGColorSpaceRef genericColorSpace  = wxMacGetGenericRGBColorSpace();
  92         CGContextRef bmCtx = CGBitmapContextCreate(data , w, h, bitsPerComp , bytesPerPixel * w , genericColorSpace, a);
  93         wxASSERT_MSG( bmCtx , wxT("Unable to create bitmap context") ) ;
  94
  95         CGContextSetFillColorSpace(bmCtx, genericColorSpace);
  96         CGContextSetStrokeColorSpace(bmCtx, genericColorSpace);
  97
  98         if( bmCtx )
  99         {
 100             CGContextTranslateCTM( bmCtx , 0 ,  m_selected.GetHeight() ) ;
 101             CGContextScaleCTM( bmCtx , 1 , -1 ) ;
 102             m_graphicContext = new wxMacCGContext( bmCtx ) ;
 103             m_graphicContext->SetPen( m_pen ) ;
 104             m_graphicContext->SetBrush( m_brush ) ;
 105         }
 106         m_ok = (m_graphicContext != NULL) ;
 107 #else
 108         if ( ( m_macPort = m_selected.GetHBITMAP( &m_macMask ) ) != NULL )
 109         {
 110             LockPixels( GetGWorldPixMap(  (CGrafPtr)  m_macPort ) ) ;
 111             /*
 112             wxMask * mask = bitmap.GetMask() ;
 113             if ( mask )
 114             {
 115                 m_macMask = mask->GetHBITMAP() ;
 116             }
 117             */
 118             SetRectRgn( (RgnHandle) m_macBoundaryClipRgn , 0 , 0 , m_selected.GetWidth() , m_selected.GetHeight() ) ;
 119             CopyRgn( (RgnHandle) m_macBoundaryClipRgn ,(RgnHandle)  m_macCurrentClipRgn ) ;
 120             m_ok = TRUE ;
 121         }
 122         else
 123         {
 124             m_ok = FALSE;
 125         }
 126 #endif
 127     }
 128     else
 129     {
 130         m_ok = FALSE;
 131     }
 132 }
 133
 134 void wxMemoryDC::DoGetSize( int *width, int *height ) const
 135 {
 136     if (m_selected.Ok())
 137     {
 138         if (width) (*width) = m_selected.GetWidth();
 139         if (height) (*height) = m_selected.GetHeight();
 140     }
 141     else
 142     {
 143         if (width) (*width) = 0;
 144         if (height) (*height) = 0;
 145     }
 146 }
 147
 148