src/osx/core/dcmemory.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/osx/core/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 #include "wx/osx/dcmemory.h"
  17
  18 #include "wx/osx/private.h"
  19
  20 //-----------------------------------------------------------------------------
  21 // wxMemoryDCImpl
  22 //-----------------------------------------------------------------------------
  23
  24 IMPLEMENT_ABSTRACT_CLASS(wxMemoryDCImpl,wxPaintDCImpl)
  25
  26
  27 wxMemoryDCImpl::wxMemoryDCImpl( wxMemoryDC *owner )
  28   : wxPaintDCImpl( owner )
  29 {
  30     Init();
  31 }
  32
  33 wxMemoryDCImpl::wxMemoryDCImpl( wxMemoryDC *owner, wxBitmap& bitmap )
  34   : wxPaintDCImpl( owner )
  35 {
  36     Init();
  37     DoSelect(bitmap);
  38 }
  39
  40 wxMemoryDCImpl::wxMemoryDCImpl( wxMemoryDC *owner, wxDC * WXUNUSED(dc) )
  41   : wxPaintDCImpl( owner )
  42 {
  43     Init();
  44 }
  45
  46 void wxMemoryDCImpl::Init()
  47 {
  48     m_ok = true;
  49     SetBackground(*wxWHITE_BRUSH);
  50     SetBrush(*wxWHITE_BRUSH);
  51     SetPen(*wxBLACK_PEN);
  52     SetFont(*wxNORMAL_FONT);
  53     m_ok = false;
  54 }
  55
  56 wxMemoryDCImpl::~wxMemoryDCImpl()
  57 {
  58     if ( m_selected.Ok() )
  59     {
  60         m_selected.EndRawAccess() ;
  61         delete m_graphicContext ;
  62         m_graphicContext = NULL ;
  63     }
  64 }
  65
  66 void wxMemoryDCImpl::DoSelect( const wxBitmap& bitmap )
  67 {
  68     if ( m_selected.Ok() )
  69     {
  70         m_selected.EndRawAccess() ;
  71         delete m_graphicContext ;
  72         m_graphicContext = NULL ;
  73     }
  74
  75     m_selected = bitmap;
  76     if (m_selected.Ok())
  77     {
  78         if ( m_selected.GetDepth() != 1 )
  79             m_selected.UseAlpha() ;
  80         m_selected.BeginRawAccess() ;
  81                 m_width = bitmap.GetWidth();
  82                 m_height = bitmap.GetHeight();
  83         CGColorSpaceRef genericColorSpace  = wxMacGetGenericRGBColorSpace();
  84         CGContextRef bmCtx = (CGContextRef) m_selected.GetHBITMAP();
  85
  86         if ( bmCtx )
  87         {
  88             CGContextSetFillColorSpace( bmCtx, genericColorSpace );
  89             CGContextSetStrokeColorSpace( bmCtx, genericColorSpace );
  90                         SetGraphicsContext( wxGraphicsContext::CreateFromNative( bmCtx ) );
  91         }
  92         m_ok = (m_graphicContext != NULL) ;
  93     }
  94     else
  95     {
  96         m_ok = false;
  97     }
  98 }
  99
 100 void wxMemoryDCImpl::DoGetSize( int *width, int *height ) const
 101 {
 102     if (m_selected.Ok())
 103     {
 104         if (width)
 105             (*width) = m_selected.GetWidth();
 106         if (height)
 107             (*height) = m_selected.GetHeight();
 108     }
 109     else
 110     {
 111         if (width)
 112             (*width) = 0;
 113         if (height)
 114             (*height) = 0;
 115     }
 116 }