src/osx/carbon/dcclient.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/osx/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 #include "wx/osx/dcclient.h"
  30
  31 //-----------------------------------------------------------------------------
  32 // wxWindowDCImpl
  33 //-----------------------------------------------------------------------------
  34
  35 IMPLEMENT_ABSTRACT_CLASS(wxWindowDCImpl, wxGCDCImpl)
  36
  37 wxWindowDCImpl::wxWindowDCImpl( wxDC *owner )
  38    : wxGCDCImpl( owner )
  39 {
  40     m_release = false;
  41 }
  42
  43
  44 wxWindowDCImpl::wxWindowDCImpl( wxDC *owner, wxWindow *window )
  45    : wxGCDCImpl( owner )
  46 {
  47     m_window = window;
  48
  49     m_ok = true ;
  50
  51     m_window->GetSize( &m_width , &m_height);
  52     if ( !m_window->IsShownOnScreen() )
  53         m_width = m_height = 0;
  54
  55     CGContextRef cg = (CGContextRef) window->MacGetCGContextRef();
  56
  57     m_release = false;
  58     if ( cg == NULL )
  59     {
  60         SetGraphicsContext( wxGraphicsContext::Create( window ) ) ;
  61         m_contentScaleFactor = window->GetContentScaleFactor();
  62         SetDeviceOrigin(-window->MacGetLeftBorderSize() , -window->MacGetTopBorderSize());
  63     }
  64     else
  65     {
  66         // determine content scale
  67         CGRect userrect = CGRectMake(0, 0, 10, 10);
  68         CGRect devicerect;
  69         devicerect = CGContextConvertRectToDeviceSpace(cg, userrect);
  70         m_contentScaleFactor = devicerect.size.height / userrect.size.height;
  71
  72         CGContextSaveGState( cg );
  73         m_release = true ;
  74         // make sure the context is having its origin at the wx-window coordinates of the
  75         // view (read at the top of window.cpp about the differences)
  76         if ( window->MacGetLeftBorderSize() != 0 || window->MacGetTopBorderSize() != 0 )
  77             CGContextTranslateCTM( cg , -window->MacGetLeftBorderSize() , -window->MacGetTopBorderSize() );
  78
  79         wxGraphicsContext* context = wxGraphicsContext::CreateFromNative( cg );
  80         context->EnableOffset(true);
  81         SetGraphicsContext( context );
  82     }
  83     DoSetClippingRegion( 0 , 0 , m_width , m_height ) ;
  84
  85     SetBackground(wxBrush(window->GetBackgroundColour(),wxSOLID));
  86
  87     SetFont( window->GetFont() ) ;
  88 }
  89
  90 wxWindowDCImpl::~wxWindowDCImpl()
  91 {
  92     if ( m_release )
  93     {
  94         // this must not necessarily be the current context, we must restore the state of the
  95         // cg we started with above (before the CGContextTranslateCTM call)
  96         CGContextRef cg = (CGContextRef) m_window->MacGetCGContextRef();
  97         CGContextRestoreGState(cg);
  98     }
  99 }
 100
 101 void wxWindowDCImpl::DoGetSize( int* width, int* height ) const
 102 {
 103     if ( width )
 104         *width = m_width;
 105     if ( height )
 106         *height = m_height;
 107 }
 108
 109 #if wxOSX_USE_CARBON
 110 wxBitmap wxWindowDCImpl::DoGetAsBitmap(const wxRect *subrect) const
 111 {
 112     // wxScreenDC is derived from wxWindowDC, so a screen dc will
 113     // call this method when a Blit is performed with it as a source.
 114     if (!m_window)
 115         return wxNullBitmap;
 116
 117     ControlRef handle = (ControlRef) m_window->GetHandle();
 118     if ( !handle )
 119         return wxNullBitmap;
 120
 121     HIRect rect;
 122     CGImageRef image;
 123     CGContextRef context;
 124
 125     HIViewCreateOffscreenImage( handle, 0, &rect, &image);
 126
 127
 128     int width = subrect != NULL ? subrect->width : (int)rect.size.width;
 129     int height = subrect !=  NULL ? subrect->height : (int)rect.size.height ;
 130
 131     wxBitmap bmp = wxBitmap(width, height, 32);
 132
 133     context = (CGContextRef)bmp.GetHBITMAP();
 134
 135     CGContextSaveGState(context);
 136
 137     CGContextTranslateCTM( context, 0,  height );
 138     CGContextScaleCTM( context, 1, -1 );
 139
 140     if ( subrect )
 141         rect = CGRectOffset( rect, -subrect->x, -subrect->y ) ;
 142     CGContextDrawImage( context, rect, image );
 143
 144     CGContextRestoreGState(context);
 145     return bmp;
 146 }
 147 #endif
 148
 149 /*
 150  * wxClientDCImpl
 151  */
 152
 153 IMPLEMENT_ABSTRACT_CLASS(wxClientDCImpl, wxWindowDCImpl)
 154
 155 wxClientDCImpl::wxClientDCImpl( wxDC *owner )
 156  : wxWindowDCImpl( owner )
 157 {
 158 }
 159
 160 wxClientDCImpl::wxClientDCImpl( wxDC *owner, wxWindow *window ) :
 161     wxWindowDCImpl( owner, window )
 162 {
 163     wxCHECK_RET( window, wxT("invalid window in wxClientDCImpl") );
 164     wxPoint origin = window->GetClientAreaOrigin() ;
 165     m_window->GetClientSize( &m_width , &m_height);
 166     if ( !m_window->IsShownOnScreen() )
 167         m_width = m_height = 0;
 168
 169     int x0,y0;
 170     DoGetDeviceOrigin(&x0,&y0);
 171     SetDeviceOrigin( origin.x + x0, origin.y + y0 );
 172
 173     DoSetClippingRegion( 0 , 0 , m_width , m_height ) ;
 174 }
 175
 176 wxClientDCImpl::~wxClientDCImpl()
 177 {
 178     if( GetGraphicsContext() && GetGraphicsContext()->GetNativeContext() )
 179         Flush();
 180 }
 181
 182 /*
 183  * wxPaintDCImpl
 184  */
 185
 186 IMPLEMENT_ABSTRACT_CLASS(wxPaintDCImpl, wxWindowDCImpl)
 187
 188 wxPaintDCImpl::wxPaintDCImpl( wxDC *owner )
 189  : wxWindowDCImpl( owner )
 190 {
 191 }
 192
 193 wxPaintDCImpl::wxPaintDCImpl( wxDC *owner, wxWindow *window ) :
 194     wxWindowDCImpl( owner, window )
 195 {
 196     wxASSERT_MSG( window->MacGetCGContextRef() != NULL, wxT("using wxPaintDC without being in a native paint event") );
 197     wxPoint origin = window->GetClientAreaOrigin() ;
 198     m_window->GetClientSize( &m_width , &m_height);
 199     SetDeviceOrigin( origin.x, origin.y );
 200     DoSetClippingRegion( 0 , 0 , m_width , m_height ) ;
 201 }
 202
 203 wxPaintDCImpl::~wxPaintDCImpl()
 204 {
 205 }