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.IsOk() )
  59     {
  60         m_selected.EndRawAccess() ;
  61         wxDELETE(m_graphicContext);
  62     }
  63 }
  64
  65 void wxMemoryDCImpl::DoSelect( const wxBitmap& bitmap )
  66 {
  67     if ( m_selected.IsOk() )
  68     {
  69         m_selected.EndRawAccess() ;
  70         wxDELETE(m_graphicContext);
  71     }
  72
  73     m_selected = bitmap;
  74     if (m_selected.IsOk())
  75     {
  76         if ( m_selected.GetDepth() != 1 )
  77             m_selected.UseAlpha() ;
  78         m_selected.BeginRawAccess() ;
  79         m_width = bitmap.GetScaledWidth();
  80         m_height = bitmap.GetScaledHeight();
  81         m_contentScaleFactor = bitmap.GetScaleFactor();
  82         CGColorSpaceRef genericColorSpace  = wxMacGetGenericRGBColorSpace();
  83         CGContextRef bmCtx = (CGContextRef) m_selected.GetHBITMAP();
  84
  85         if ( bmCtx )
  86         {
  87             CGContextSetFillColorSpace( bmCtx, genericColorSpace );
  88             CGContextSetStrokeColorSpace( bmCtx, genericColorSpace );
  89             SetGraphicsContext( wxGraphicsContext::CreateFromNative( bmCtx ) );
  90         }
  91         m_ok = (m_graphicContext != NULL) ;
  92     }
  93     else
  94     {
  95         m_ok = false;
  96     }
  97 }
  98
  99 void wxMemoryDCImpl::DoGetSize( int *width, int *height ) const
 100 {
 101     if (m_selected.IsOk())
 102     {
 103         if (width)
 104             (*width) = m_selected.GetScaledWidth();
 105         if (height)
 106             (*height) = m_selected.GetScaledHeight();
 107     }
 108     else
 109     {
 110         if (width)
 111             (*width) = 0;
 112         if (height)
 113             (*height) = 0;
 114     }
 115 }