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 #include "wx/graphics.h"
  16
  17 #include "wx/mac/private.h"
  18
  19 //-----------------------------------------------------------------------------
  20 // wxMemoryDC
  21 //-----------------------------------------------------------------------------
  22
  23 IMPLEMENT_DYNAMIC_CLASS(wxMemoryDC,wxPaintDC)
  24
  25 void wxMemoryDC::Init()
  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     Init();
  39 }
  40
  41 wxMemoryDC::~wxMemoryDC()
  42 {
  43     if ( m_selected.Ok() )
  44     {
  45         m_selected.EndRawAccess() ;
  46         delete m_graphicContext ;
  47         m_graphicContext = NULL ;
  48     }
  49 }
  50
  51 void wxMemoryDC::DoSelect( const wxBitmap& bitmap )
  52 {
  53     if ( m_selected.Ok() )
  54     {
  55         m_selected.EndRawAccess() ;
  56         delete m_graphicContext ;
  57         m_graphicContext = NULL ;
  58     }
  59
  60     m_selected = bitmap;
  61     if (m_selected.Ok())
  62     {
  63         if ( m_selected.GetDepth() != 1 )
  64             m_selected.UseAlpha() ;
  65         m_selected.BeginRawAccess() ;
  66                 m_width = bitmap.GetWidth();
  67                 m_height = bitmap.GetHeight();
  68         CGColorSpaceRef genericColorSpace  = wxMacGetGenericRGBColorSpace();
  69         CGContextRef bmCtx = (CGContextRef) m_selected.GetHBITMAP();
  70
  71         if ( bmCtx )
  72         {
  73             CGContextSetFillColorSpace( bmCtx, genericColorSpace );
  74             CGContextSetStrokeColorSpace( bmCtx, genericColorSpace );
  75                         SetGraphicsContext( wxGraphicsContext::CreateFromNative( bmCtx ) );
  76         }
  77         m_ok = (m_graphicContext != NULL) ;
  78     }
  79     else
  80     {
  81         m_ok = false;
  82     }
  83 }
  84
  85 void wxMemoryDC::DoGetSize( int *width, int *height ) const
  86 {
  87     if (m_selected.Ok())
  88     {
  89         if (width)
  90             (*width) = m_selected.GetWidth();
  91         if (height)
  92             (*height) = m_selected.GetHeight();
  93     }
  94     else
  95     {
  96         if (width)
  97             (*width) = 0;
  98         if (height)
  99             (*height) = 0;
 100     }
 101 }