src/mac/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/mac/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     wxTopLevelWindowMac* rootwindow = window->MacGetTopLevelWindow() ;
  48     if (!rootwindow)
  49         return;
  50
  51     m_ok = true ;
  52
  53     m_window->GetSize( &m_width , &m_height);
  54     CGContextRef cg = (CGContextRef) window->MacGetCGContextRef();
  55     m_release = false;
  56     if ( cg == NULL )
  57     {
  58         SetGraphicsContext( wxGraphicsContext::Create( window ) ) ;
  59     }
  60     else
  61     {
  62         CGContextSaveGState( cg );
  63         m_release = true ;
  64         // make sure the context is having its origin at the wx-window coordinates of the
  65         // view (read at the top of window.cpp about the differences)
  66         if ( window->MacGetLeftBorderSize() != 0 || window->MacGetTopBorderSize() != 0 )
  67             CGContextTranslateCTM( cg , -window->MacGetLeftBorderSize() , -window->MacGetTopBorderSize() );
  68
  69         SetGraphicsContext( wxGraphicsContext::CreateFromNative( cg ) );
  70     }
  71     DoSetClippingRegion( 0 , 0 , m_width , m_height ) ;
  72
  73     SetBackground(wxBrush(window->GetBackgroundColour(),wxSOLID));
  74
  75     SetFont( window->GetFont() ) ;
  76 }
  77
  78 wxWindowDCImpl::~wxWindowDCImpl()
  79 {
  80     if ( m_release )
  81     {
  82         // this must not necessarily be the current context, we must restore the state of the
  83         // cg we started with above (before the CGContextTranslateCTM call)
  84         CGContextRef cg = (CGContextRef) m_window->MacGetCGContextRef();
  85         CGContextRestoreGState(cg);
  86     }
  87 }
  88
  89 void wxWindowDCImpl::DoGetSize( int* width, int* height ) const
  90 {
  91     if ( width )
  92         *width = m_width;
  93     if ( height )
  94         *height = m_height;
  95 }
  96
  97 wxBitmap wxWindowDCImpl::DoGetAsBitmap(const wxRect *subrect) const
  98 {
  99     // wxScreenDC is derived from wxWindowDC, so a screen dc will
 100     // call this method when a Blit is performed with it as a source.
 101     if (!m_window)
 102         return wxNullBitmap;
 103
 104 #ifdef __LP64__
 105     return wxNullBitmap;
 106 #else
 107     ControlRef handle = (ControlRef) m_window->GetHandle();
 108     if ( !handle )
 109         return wxNullBitmap;
 110
 111     HIRect rect;
 112     CGImageRef image;
 113     CGContextRef context;
 114     void* data;
 115
 116     size_t bytesPerRow;
 117
 118     HIViewCreateOffscreenImage( handle, 0, &rect, &image);
 119
 120
 121     int width = subrect != NULL ? subrect->width : (int)rect.size.width;
 122     int height = subrect !=  NULL ? subrect->height : (int)rect.size.height ;
 123
 124     bytesPerRow = ( ( width * 8 * 4 + 7 ) / 8 );
 125
 126     data = calloc( 1, bytesPerRow * height );
 127     context = CGBitmapContextCreate( data, width, height, 8, bytesPerRow, CGColorSpaceCreateDeviceRGB(), kCGImageAlphaPremultipliedFirst );
 128
 129     if ( subrect )
 130         rect = CGRectOffset( rect, -subrect->x, -subrect->y ) ;
 131     CGContextDrawImage( context, rect, image );
 132
 133     unsigned char* buffer = (unsigned char*) data;
 134     wxBitmap bmp = wxBitmap(width, height, 32);
 135     wxAlphaPixelData pixData(bmp, wxPoint(0,0), wxSize(width, height));
 136
 137     wxAlphaPixelData::Iterator p(pixData);
 138     for (int y=0; y<height; y++) {
 139         wxAlphaPixelData::Iterator rowStart = p;
 140         for (int x=0; x<width; x++) {
 141             unsigned char a = buffer[3];
 142             p.Red()   = a; buffer++;
 143             p.Green() = a; buffer++;
 144             p.Blue()  = a; buffer++;
 145             p.Alpha() = a; buffer++;
 146             ++p;
 147         }
 148         p = rowStart;
 149         p.OffsetY(pixData, 1);
 150     }
 151
 152     return bmp;
 153 #endif
 154 }
 155
 156 /*
 157  * wxClientDCImpl
 158  */
 159
 160 IMPLEMENT_ABSTRACT_CLASS(wxClientDCImpl, wxWindowDCImpl)
 161
 162 wxClientDCImpl::wxClientDCImpl( wxDC *owner )
 163  : wxWindowDCImpl( owner )
 164 {
 165 }
 166
 167 wxClientDCImpl::wxClientDCImpl( wxDC *owner, wxWindow *window ) :
 168     wxWindowDCImpl( owner, window )
 169 {
 170     wxCHECK_RET( window, _T("invalid window in wxClientDCImpl") );
 171     wxPoint origin = window->GetClientAreaOrigin() ;
 172     m_window->GetClientSize( &m_width , &m_height);
 173     SetDeviceOrigin( origin.x, origin.y );
 174     DoSetClippingRegion( 0 , 0 , m_width , m_height ) ;
 175 }
 176
 177 wxClientDCImpl::~wxClientDCImpl()
 178 {
 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     wxPoint origin = window->GetClientAreaOrigin() ;
 196     m_window->GetClientSize( &m_width , &m_height);
 197     SetDeviceOrigin( origin.x, origin.y );
 198     DoSetClippingRegion( 0 , 0 , m_width , m_height ) ;
 199 }
 200
 201 wxPaintDCImpl::~wxPaintDCImpl()
 202 {
 203 }