src/mac/carbon/dcclient.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/mac/carbon/dcclient.cpp
   3 // Purpose:     wxClientDC 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 // constants
  32 //-----------------------------------------------------------------------------
  33
  34 //-----------------------------------------------------------------------------
  35 // wxPaintDC
  36 //-----------------------------------------------------------------------------
  37
  38 IMPLEMENT_DYNAMIC_CLASS(wxWindowDC, wxDC)
  39 IMPLEMENT_DYNAMIC_CLASS(wxClientDC, wxWindowDC)
  40 IMPLEMENT_DYNAMIC_CLASS(wxPaintDC, wxWindowDC)
  41
  42 /*
  43  * wxWindowDC
  44  */
  45
  46 #include "wx/mac/uma.h"
  47 #include "wx/notebook.h"
  48 #include "wx/tabctrl.h"
  49
  50
  51 static wxBrush MacGetBackgroundBrush( wxWindow* window )
  52 {
  53     wxBrush bkdBrush = window->MacGetBackgroundBrush() ;
  54     return bkdBrush ;
  55 }
  56
  57 wxWindowDC::wxWindowDC()
  58 {
  59     m_window = NULL ;
  60     m_release = false;
  61 }
  62
  63 wxWindowDC::wxWindowDC(wxWindow *window)
  64 {
  65     m_window = window ;
  66     wxTopLevelWindowMac* rootwindow = window->MacGetTopLevelWindow() ;
  67     if (!rootwindow)
  68         return;
  69
  70     m_ok = true ;
  71
  72     m_window->GetSize( &m_width , &m_height);
  73     CGContextRef cg = (CGContextRef) window->MacGetCGContextRef();
  74     m_release = false;
  75     if ( cg == NULL )
  76     {
  77         SetGraphicsContext( wxGraphicsContext::Create( window ) ) ;
  78     }
  79     else
  80     {
  81         CGContextSaveGState( cg );
  82         m_release = true ;
  83         // make sure the context is having its origin at the wx-window coordinates of the
  84         // view (read at the top of window.cpp about the differences)
  85         if ( window->MacGetLeftBorderSize() != 0 || window->MacGetTopBorderSize() != 0 )
  86             CGContextTranslateCTM( cg , -window->MacGetLeftBorderSize() , -window->MacGetTopBorderSize() );
  87
  88         SetGraphicsContext( wxGraphicsContext::CreateFromNative( cg ) );
  89     }
  90     SetClippingRegion( 0 , 0 , m_width , m_height ) ;
  91
  92     SetBackground(MacGetBackgroundBrush(window));
  93
  94     SetFont( window->GetFont() ) ;
  95 }
  96
  97 wxWindowDC::~wxWindowDC()
  98 {
  99     if ( m_release )
 100     {
 101         // this must not necessarily be the current context, we must restore the state of the
 102         // cg we started with above (before the CGContextTranslateCTM call)
 103         CGContextRef cg = (CGContextRef) m_window->MacGetCGContextRef();
 104         CGContextRestoreGState(cg);
 105     }
 106 }
 107
 108 void wxWindowDC::DoGetSize( int* width, int* height ) const
 109 {
 110     if ( width )
 111         *width = m_width;
 112     if ( height )
 113         *height = m_height;
 114 }
 115
 116 wxBitmap wxWindowDC::DoGetAsBitmap(const wxRect *subrect) const
 117 {
 118     // wxScreenDC is derived from wxWindowDC, so a screen dc will
 119     // call this method when a Blit is performed with it as a source.
 120     if (!m_window)
 121         return wxNullBitmap;
 122
 123     ControlRef handle = (ControlRef) m_window->GetHandle();
 124     if ( !handle )
 125         return wxNullBitmap;
 126
 127     HIRect rect;
 128     CGImageRef image;
 129     CGContextRef context;
 130     void* data;
 131
 132     size_t bytesPerRow;
 133
 134     HIViewCreateOffscreenImage( handle, 0, &rect, &image);
 135
 136
 137     int width = subrect != NULL ? subrect->width : (int)rect.size.width;
 138     int height = subrect !=  NULL ? subrect->height : (int)rect.size.height ;
 139
 140     bytesPerRow = ( ( width * 8 * 4 + 7 ) / 8 );
 141
 142     data = calloc( 1, bytesPerRow * height );
 143     context = CGBitmapContextCreate( data, width, height, 8, bytesPerRow, CGColorSpaceCreateDeviceRGB(), kCGImageAlphaPremultipliedFirst );
 144
 145     if ( subrect )
 146         rect = CGRectOffset( rect, -subrect->x, -subrect->y ) ;
 147     CGContextDrawImage( context, rect, image );
 148
 149     unsigned char* buffer = (unsigned char*) data;
 150     wxBitmap bmp = wxBitmap(width, height, 32);
 151     wxAlphaPixelData pixData(bmp, wxPoint(0,0), wxSize(width, height));
 152
 153     wxAlphaPixelData::Iterator p(pixData);
 154     for (int y=0; y<height; y++) {
 155         wxAlphaPixelData::Iterator rowStart = p;
 156         for (int x=0; x<width; x++) {
 157             unsigned char a = buffer[3];
 158             p.Red()   = a; buffer++;
 159             p.Green() = a; buffer++;
 160             p.Blue()  = a; buffer++;
 161             p.Alpha() = a; buffer++;
 162             ++p;
 163         }
 164         p = rowStart;
 165         p.OffsetY(pixData, 1);
 166     }
 167
 168     return bmp;
 169 }
 170
 171 /*
 172  * wxClientDC
 173  */
 174
 175 wxClientDC::wxClientDC()
 176 {
 177     m_window = NULL ;
 178 }
 179
 180 wxClientDC::wxClientDC(wxWindow *window) :
 181     wxWindowDC( window )
 182 {
 183     wxCHECK_RET( window, _T("invalid window in wxClientDC") );
 184     wxPoint origin = window->GetClientAreaOrigin() ;
 185     m_window->GetClientSize( &m_width , &m_height);
 186     SetDeviceOrigin( origin.x, origin.y );
 187     SetClippingRegion( 0 , 0 , m_width , m_height ) ;
 188 }
 189
 190 wxClientDC::~wxClientDC()
 191 {
 192 }
 193
 194 /*
 195  * wxPaintDC
 196  */
 197
 198 wxPaintDC::wxPaintDC()
 199 {
 200     m_window = NULL ;
 201 }
 202
 203 wxPaintDC::wxPaintDC(wxWindow *window) :
 204     wxWindowDC( window )
 205 {
 206     wxPoint origin = window->GetClientAreaOrigin() ;
 207     m_window->GetClientSize( &m_width , &m_height);
 208     SetDeviceOrigin( origin.x, origin.y );
 209     SetClippingRegion( 0 , 0 , m_width , m_height ) ;
 210 }
 211
 212 wxPaintDC::~wxPaintDC()
 213 {
 214 }