src/osx/carbon/dcclient.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/mac/carbon/dcclient.cpp
   3 // Purpose:     wxClientDCImpl 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/dcclient.h"
  15
  16 #ifndef WX_PRECOMP
  17     #include "wx/log.h"
  18     #include "wx/window.h"
  19     #include "wx/dcmemory.h"
  20     #include "wx/settings.h"
  21     #include "wx/toplevel.h"
  22     #include "wx/math.h"
  23     #include "wx/region.h"
  24 #endif
  25
  26 #include "wx/graphics.h"
  27 #include "wx/rawbmp.h"
  28 #include "wx/osx/private.h"
  29
  30 //-----------------------------------------------------------------------------
  31 // wxWindowDCImpl
  32 //-----------------------------------------------------------------------------
  33
  34 IMPLEMENT_ABSTRACT_CLASS(wxWindowDCImpl, wxGCDCImpl)
  35
  36 wxWindowDCImpl::wxWindowDCImpl( wxDC *owner )
  37    : wxGCDCImpl( owner )
  38 {
  39     m_release = false;
  40 }
  41
  42 wxWindowDCImpl::wxWindowDCImpl( wxDC *owner, wxWindow *window )
  43    : wxGCDCImpl( owner )
  44 {
  45     m_window = window;
  46
  47     WindowRef rootwindow = (WindowRef) window->MacGetTopLevelWindowRef() ;
  48     if (!rootwindow)
  49         return;
  50
  51     m_ok = true ;
  52
  53     m_window->GetSize( &m_width , &m_height);
  54     if ( !m_window->IsShownOnScreen() )
  55         m_width = m_height = 0;
  56     CGContextRef cg = (CGContextRef) window->MacGetCGContextRef();
  57     m_release = false;
  58     if ( cg == NULL )
  59     {
  60         SetGraphicsContext( wxGraphicsContext::Create( window ) ) ;
  61     }
  62     else
  63     {
  64         CGContextSaveGState( cg );
  65         m_release = true ;
  66         // make sure the context is having its origin at the wx-window coordinates of the
  67         // view (read at the top of window.cpp about the differences)
  68         if ( window->MacGetLeftBorderSize() != 0 || window->MacGetTopBorderSize() != 0 )
  69             CGContextTranslateCTM( cg , -window->MacGetLeftBorderSize() , -window->MacGetTopBorderSize() );
  70
  71         SetGraphicsContext( wxGraphicsContext::CreateFromNative( cg ) );
  72     }
  73     DoSetClippingRegion( 0 , 0 , m_width , m_height ) ;
  74
  75     SetBackground(wxBrush(window->GetBackgroundColour(),wxSOLID));
  76
  77     SetFont( window->GetFont() ) ;
  78 }
  79
  80 wxWindowDCImpl::~wxWindowDCImpl()
  81 {
  82     if ( m_release )
  83     {
  84         // this must not necessarily be the current context, we must restore the state of the
  85         // cg we started with above (before the CGContextTranslateCTM call)
  86         CGContextRef cg = (CGContextRef) m_window->MacGetCGContextRef();
  87         CGContextRestoreGState(cg);
  88     }
  89 }
  90
  91 void wxWindowDCImpl::DoGetSize( int* width, int* height ) const
  92 {
  93     if ( width )
  94         *width = m_width;
  95     if ( height )
  96         *height = m_height;
  97 }
  98
  99 wxBitmap wxWindowDCImpl::DoGetAsBitmap(const wxRect *subrect) const
 100 {
 101     // wxScreenDC is derived from wxWindowDC, so a screen dc will
 102     // call this method when a Blit is performed with it as a source.
 103     if (!m_window)
 104         return wxNullBitmap;
 105
 106 #ifdef __LP64__
 107     return wxNullBitmap;
 108 #else
 109     ControlRef handle = (ControlRef) m_window->GetHandle();
 110     if ( !handle )
 111         return wxNullBitmap;
 112
 113     HIRect rect;
 114     CGImageRef image;
 115     CGContextRef context;
 116     void* data;
 117
 118     size_t bytesPerRow;
 119
 120     HIViewCreateOffscreenImage( handle, 0, &rect, &image);
 121
 122
 123     int width = subrect != NULL ? subrect->width : (int)rect.size.width;
 124     int height = subrect !=  NULL ? subrect->height : (int)rect.size.height ;
 125
 126     wxBitmap bmp = wxBitmap(width, height, 32);
 127
 128     context = (CGContextRef)bmp.GetHBITMAP();
 129
 130     CGContextSaveGState(context);
 131
 132     CGContextTranslateCTM( context, 0,  height );
 133     CGContextScaleCTM( context, 1, -1 );
 134
 135     if ( subrect )
 136         rect = CGRectOffset( rect, -subrect->x, -subrect->y ) ;
 137     CGContextDrawImage( context, rect, image );
 138
 139     CGContextRestoreGState(context);
 140
 141     return bmp;
 142 #endif
 143 }
 144
 145 /*
 146  * wxClientDCImpl
 147  */
 148
 149 IMPLEMENT_ABSTRACT_CLASS(wxClientDCImpl, wxWindowDCImpl)
 150
 151 wxClientDCImpl::wxClientDCImpl( wxDC *owner )
 152  : wxWindowDCImpl( owner )
 153 {
 154 }
 155
 156 wxClientDCImpl::wxClientDCImpl( wxDC *owner, wxWindow *window ) :
 157     wxWindowDCImpl( owner, window )
 158 {
 159     wxCHECK_RET( window, _T("invalid window in wxClientDCImpl") );
 160     wxPoint origin = window->GetClientAreaOrigin() ;
 161     m_window->GetClientSize( &m_width , &m_height);
 162     if ( !m_window->IsShownOnScreen() )
 163         m_width = m_height = 0;
 164     SetDeviceOrigin( origin.x, origin.y );
 165     DoSetClippingRegion( 0 , 0 , m_width , m_height ) ;
 166 }
 167
 168 wxClientDCImpl::~wxClientDCImpl()
 169 {
 170 }
 171
 172 /*
 173  * wxPaintDCImpl
 174  */
 175
 176 IMPLEMENT_ABSTRACT_CLASS(wxPaintDCImpl, wxWindowDCImpl)
 177
 178 wxPaintDCImpl::wxPaintDCImpl( wxDC *owner )
 179  : wxWindowDCImpl( owner )
 180 {
 181 }
 182
 183 wxPaintDCImpl::wxPaintDCImpl( wxDC *owner, wxWindow *window ) :
 184     wxWindowDCImpl( owner, window )
 185 {
 186     wxPoint origin = window->GetClientAreaOrigin() ;
 187     m_window->GetClientSize( &m_width , &m_height);
 188     SetDeviceOrigin( origin.x, origin.y );
 189     DoSetClippingRegion( 0 , 0 , m_width , m_height ) ;
 190 }
 191
 192 wxPaintDCImpl::~wxPaintDCImpl()
 193 {
 194 }