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 // Copyright:   (c) Stefan Csomor
   8 // Licence:     wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11 #include "wx/wxprec.h"
  12
  13 #include "wx/dcclient.h"
  14
  15 #ifndef WX_PRECOMP
  16     #include "wx/log.h"
  17     #include "wx/window.h"
  18     #include "wx/dcmemory.h"
  19     #include "wx/settings.h"
  20     #include "wx/toplevel.h"
  21     #include "wx/math.h"
  22     #include "wx/region.h"
  23 #endif
  24
  25 #include "wx/graphics.h"
  26 #include "wx/rawbmp.h"
  27 #include "wx/osx/private.h"
  28 #include "wx/osx/dcclient.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
  43 wxWindowDCImpl::wxWindowDCImpl( wxDC *owner, wxWindow *window )
  44    : wxGCDCImpl( owner )
  45 {
  46     m_window = window;
  47
  48     m_ok = true ;
  49
  50     m_window->GetSize( &m_width , &m_height);
  51     if ( !m_window->IsShownOnScreen() )
  52         m_width = m_height = 0;
  53
  54     CGContextRef cg = (CGContextRef) window->MacGetCGContextRef();
  55
  56     m_release = false;
  57     if ( cg == NULL )
  58     {
  59         SetGraphicsContext( wxGraphicsContext::Create( window ) ) ;
  60         m_contentScaleFactor = window->GetContentScaleFactor();
  61         SetDeviceOrigin(-window->MacGetLeftBorderSize() , -window->MacGetTopBorderSize());
  62     }
  63     else
  64     {
  65         // determine content scale
  66         CGRect userrect = CGRectMake(0, 0, 10, 10);
  67         CGRect devicerect;
  68         devicerect = CGContextConvertRectToDeviceSpace(cg, userrect);
  69         m_contentScaleFactor = devicerect.size.height / userrect.size.height;
  70
  71         CGContextSaveGState( cg );
  72         m_release = true ;
  73         // make sure the context is having its origin at the wx-window coordinates of the
  74         // view (read at the top of window.cpp about the differences)
  75         if ( window->MacGetLeftBorderSize() != 0 || window->MacGetTopBorderSize() != 0 )
  76             CGContextTranslateCTM( cg , -window->MacGetLeftBorderSize() , -window->MacGetTopBorderSize() );
  77
  78         wxGraphicsContext* context = wxGraphicsContext::CreateFromNative( cg );
  79         context->EnableOffset(true);
  80         SetGraphicsContext( context );
  81     }
  82     DoSetClippingRegion( 0 , 0 , m_width , m_height ) ;
  83
  84     SetBackground(wxBrush(window->GetBackgroundColour(),wxSOLID));
  85
  86     SetFont( window->GetFont() ) ;
  87 }
  88
  89 wxWindowDCImpl::~wxWindowDCImpl()
  90 {
  91     if ( m_release )
  92     {
  93         // this must not necessarily be the current context, we must restore the state of the
  94         // cg we started with above (before the CGContextTranslateCTM call)
  95         CGContextRef cg = (CGContextRef) m_window->MacGetCGContextRef();
  96         CGContextRestoreGState(cg);
  97     }
  98 }
  99
 100 void wxWindowDCImpl::DoGetSize( int* width, int* height ) const
 101 {
 102     if ( width )
 103         *width = m_width;
 104     if ( height )
 105         *height = m_height;
 106 }
 107
 108 #if wxOSX_USE_CARBON
 109 wxBitmap wxWindowDCImpl::DoGetAsBitmap(const wxRect *subrect) const
 110 {
 111     // wxScreenDC is derived from wxWindowDC, so a screen dc will
 112     // call this method when a Blit is performed with it as a source.
 113     if (!m_window)
 114         return wxNullBitmap;
 115
 116     ControlRef handle = (ControlRef) m_window->GetHandle();
 117     if ( !handle )
 118         return wxNullBitmap;
 119
 120     HIRect rect;
 121     CGImageRef image;
 122     CGContextRef context;
 123
 124     HIViewCreateOffscreenImage( handle, 0, &rect, &image);
 125
 126
 127     int width = subrect != NULL ? subrect->width : (int)rect.size.width;
 128     int height = subrect !=  NULL ? subrect->height : (int)rect.size.height ;
 129
 130     wxBitmap bmp = wxBitmap(width, height, 32);
 131
 132     context = (CGContextRef)bmp.GetHBITMAP();
 133
 134     CGContextSaveGState(context);
 135
 136     CGContextTranslateCTM( context, 0,  height );
 137     CGContextScaleCTM( context, 1, -1 );
 138
 139     if ( subrect )
 140         rect = CGRectOffset( rect, -subrect->x, -subrect->y ) ;
 141     CGContextDrawImage( context, rect, image );
 142
 143     CGContextRestoreGState(context);
 144     return bmp;
 145 }
 146 #endif
 147
 148 /*
 149  * wxClientDCImpl
 150  */
 151
 152 IMPLEMENT_ABSTRACT_CLASS(wxClientDCImpl, wxWindowDCImpl)
 153
 154 wxClientDCImpl::wxClientDCImpl( wxDC *owner )
 155  : wxWindowDCImpl( owner )
 156 {
 157 }
 158
 159 wxClientDCImpl::wxClientDCImpl( wxDC *owner, wxWindow *window ) :
 160     wxWindowDCImpl( owner, window )
 161 {
 162     wxCHECK_RET( window, wxT("invalid window in wxClientDCImpl") );
 163     wxPoint origin = window->GetClientAreaOrigin() ;
 164     m_window->GetClientSize( &m_width , &m_height);
 165     if ( !m_window->IsShownOnScreen() )
 166         m_width = m_height = 0;
 167
 168     int x0,y0;
 169     DoGetDeviceOrigin(&x0,&y0);
 170     SetDeviceOrigin( origin.x + x0, origin.y + y0 );
 171
 172     DoSetClippingRegion( 0 , 0 , m_width , m_height ) ;
 173 }
 174
 175 wxClientDCImpl::~wxClientDCImpl()
 176 {
 177     if( GetGraphicsContext() && GetGraphicsContext()->GetNativeContext() )
 178         Flush();
 179 }
 180
 181 /*
 182  * wxPaintDCImpl
 183  */
 184
 185 IMPLEMENT_ABSTRACT_CLASS(wxPaintDCImpl, wxWindowDCImpl)
 186
 187 wxPaintDCImpl::wxPaintDCImpl( wxDC *owner )
 188  : wxWindowDCImpl( owner )
 189 {
 190 }
 191
 192 wxPaintDCImpl::wxPaintDCImpl( wxDC *owner, wxWindow *window ) :
 193     wxWindowDCImpl( owner, window )
 194 {
 195     wxASSERT_MSG( window->MacGetCGContextRef() != NULL, wxT("using wxPaintDC without being in a native paint event") );
 196     wxPoint origin = window->GetClientAreaOrigin() ;
 197     m_window->GetClientSize( &m_width , &m_height);
 198     SetDeviceOrigin( origin.x, origin.y );
 199     DoSetClippingRegion( 0 , 0 , m_width , m_height ) ;
 200 }
 201
 202 wxPaintDCImpl::~wxPaintDCImpl()
 203 {
 204 }