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 // Copyright:   (c) Stefan Csomor
   8 // Licence:     wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11 #include "wx/wxprec.h"
  12
  13 #include "wx/dcmemory.h"
  14 #include "wx/graphics.h"
  15 #include "wx/osx/dcmemory.h"
  16
  17 #include "wx/osx/private.h"
  18
  19 //-----------------------------------------------------------------------------
  20 // wxMemoryDCImpl
  21 //-----------------------------------------------------------------------------
  22
  23 IMPLEMENT_ABSTRACT_CLASS(wxMemoryDCImpl,wxPaintDCImpl)
  24
  25
  26 wxMemoryDCImpl::wxMemoryDCImpl( wxMemoryDC *owner )
  27   : wxPaintDCImpl( owner )
  28 {
  29     Init();
  30 }
  31
  32 wxMemoryDCImpl::wxMemoryDCImpl( wxMemoryDC *owner, wxBitmap& bitmap )
  33   : wxPaintDCImpl( owner )
  34 {
  35     Init();
  36     DoSelect(bitmap);
  37 }
  38
  39 wxMemoryDCImpl::wxMemoryDCImpl( wxMemoryDC *owner, wxDC * WXUNUSED(dc) )
  40   : wxPaintDCImpl( owner )
  41 {
  42     Init();
  43 }
  44
  45 void wxMemoryDCImpl::Init()
  46 {
  47     m_ok = true;
  48     SetBackground(*wxWHITE_BRUSH);
  49     SetBrush(*wxWHITE_BRUSH);
  50     SetPen(*wxBLACK_PEN);
  51     SetFont(*wxNORMAL_FONT);
  52     m_ok = false;
  53 }
  54
  55 wxMemoryDCImpl::~wxMemoryDCImpl()
  56 {
  57     if ( m_selected.IsOk() )
  58     {
  59         m_selected.EndRawAccess() ;
  60         wxDELETE(m_graphicContext);
  61     }
  62 }
  63
  64 void wxMemoryDCImpl::DoSelect( const wxBitmap& bitmap )
  65 {
  66     if ( m_selected.IsOk() )
  67     {
  68         m_selected.EndRawAccess() ;
  69         wxDELETE(m_graphicContext);
  70     }
  71
  72     m_selected = bitmap;
  73     if (m_selected.IsOk())
  74     {
  75         if ( m_selected.GetDepth() != 1 )
  76             m_selected.UseAlpha() ;
  77         m_selected.BeginRawAccess() ;
  78         m_width = bitmap.GetScaledWidth();
  79         m_height = bitmap.GetScaledHeight();
  80         m_contentScaleFactor = bitmap.GetScaleFactor();
  81         CGColorSpaceRef genericColorSpace  = wxMacGetGenericRGBColorSpace();
  82         CGContextRef bmCtx = (CGContextRef) m_selected.GetHBITMAP();
  83
  84         if ( bmCtx )
  85         {
  86             CGContextSetFillColorSpace( bmCtx, genericColorSpace );
  87             CGContextSetStrokeColorSpace( bmCtx, genericColorSpace );
  88             SetGraphicsContext( wxGraphicsContext::CreateFromNative( bmCtx ) );
  89         }
  90         m_ok = (m_graphicContext != NULL) ;
  91     }
  92     else
  93     {
  94         m_ok = false;
  95     }
  96 }
  97
  98 void wxMemoryDCImpl::DoGetSize( int *width, int *height ) const
  99 {
 100     if (m_selected.IsOk())
 101     {
 102         if (width)
 103             (*width) = m_selected.GetScaledWidth();
 104         if (height)
 105             (*height) = m_selected.GetScaledHeight();
 106     }
 107     else
 108     {
 109         if (width)
 110             (*width) = 0;
 111         if (height)
 112             (*height) = 0;
 113     }
 114 }