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 // 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.Ok() )
  58     {
  59         m_selected.EndRawAccess() ;
  60         delete m_graphicContext ;
  61         m_graphicContext = NULL ;
  62     }
  63 }
  64
  65 void wxMemoryDCImpl::DoSelect( const wxBitmap& bitmap )
  66 {
  67     if ( m_selected.Ok() )
  68     {
  69         m_selected.EndRawAccess() ;
  70         delete m_graphicContext ;
  71         m_graphicContext = NULL ;
  72     }
  73
  74     m_selected = bitmap;
  75     if (m_selected.Ok())
  76     {
  77         if ( m_selected.GetDepth() != 1 )
  78             m_selected.UseAlpha() ;
  79         m_selected.BeginRawAccess() ;
  80                 m_width = bitmap.GetWidth();
  81                 m_height = bitmap.GetHeight();
  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.Ok())
 102     {
 103         if (width)
 104             (*width) = m_selected.GetWidth();
 105         if (height)
 106             (*height) = m_selected.GetHeight();
 107     }
 108     else
 109     {
 110         if (width)
 111             (*width) = 0;
 112         if (height)
 113             (*height) = 0;
 114     }
 115 }