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
  52 wxWindowDC::wxWindowDC()
  53 {
  54     m_window = NULL ;
  55     m_release = false;
  56 }
  57
  58 wxWindowDC::wxWindowDC(wxWindow *window)
  59 {
  60     m_window = window ;
  61     wxTopLevelWindowMac* rootwindow = window->MacGetTopLevelWindow() ;
  62     if (!rootwindow)
  63         return;
  64
  65     m_ok = true ;
  66
  67     m_window->GetSize( &m_width , &m_height);
  68     CGContextRef cg = (CGContextRef) window->MacGetCGContextRef();
  69     m_release = false;
  70     if ( cg == NULL )
  71     {
  72         SetGraphicsContext( wxGraphicsContext::Create( window ) ) ;
  73     }
  74     else
  75     {
  76         CGContextSaveGState( cg );
  77         m_release = true ;
  78         // make sure the context is having its origin at the wx-window coordinates of the
  79         // view (read at the top of window.cpp about the differences)
  80         if ( window->MacGetLeftBorderSize() != 0 || window->MacGetTopBorderSize() != 0 )
  81             CGContextTranslateCTM( cg , -window->MacGetLeftBorderSize() , -window->MacGetTopBorderSize() );
  82
  83         SetGraphicsContext( wxGraphicsContext::CreateFromNative( cg ) );
  84     }
  85     SetClippingRegion( 0 , 0 , m_width , m_height ) ;
  86
  87     SetBackground(wxBrush(window->GetBackgroundColour(),wxSOLID));
  88
  89     SetFont( window->GetFont() ) ;
  90 }
  91
  92 wxWindowDC::~wxWindowDC()
  93 {
  94     if ( m_release )
  95     {
  96         // this must not necessarily be the current context, we must restore the state of the
  97         // cg we started with above (before the CGContextTranslateCTM call)
  98         CGContextRef cg = (CGContextRef) m_window->MacGetCGContextRef();
  99         CGContextRestoreGState(cg);
 100     }
 101 }
 102
 103 void wxWindowDC::DoGetSize( int* width, int* height ) const
 104 {
 105     if ( width )
 106         *width = m_width;
 107     if ( height )
 108         *height = m_height;
 109 }
 110
 111 wxBitmap wxWindowDC::DoGetAsBitmap(const wxRect *subrect) const
 112 {
 113     // wxScreenDC is derived from wxWindowDC, so a screen dc will
 114     // call this method when a Blit is performed with it as a source.
 115     if (!m_window)
 116         return wxNullBitmap;
 117
 118 #ifdef __LP64__
 119     return wxNullBitmap;
 120 #else
 121     ControlRef handle = (ControlRef) m_window->GetHandle();
 122     if ( !handle )
 123         return wxNullBitmap;
 124
 125     HIRect rect;
 126     CGImageRef image;
 127     CGContextRef context;
 128     void* data;
 129
 130     size_t bytesPerRow;
 131
 132     HIViewCreateOffscreenImage( handle, 0, &rect, &image);
 133
 134
 135     int width = subrect != NULL ? subrect->width : (int)rect.size.width;
 136     int height = subrect !=  NULL ? subrect->height : (int)rect.size.height ;
 137
 138     bytesPerRow = ( ( width * 8 * 4 + 7 ) / 8 );
 139
 140     data = calloc( 1, bytesPerRow * height );
 141     context = CGBitmapContextCreate( data, width, height, 8, bytesPerRow, CGColorSpaceCreateDeviceRGB(), kCGImageAlphaPremultipliedFirst );
 142
 143     if ( subrect )
 144         rect = CGRectOffset( rect, -subrect->x, -subrect->y ) ;
 145     CGContextDrawImage( context, rect, image );
 146
 147     unsigned char* buffer = (unsigned char*) data;
 148     wxBitmap bmp = wxBitmap(width, height, 32);
 149     wxAlphaPixelData pixData(bmp, wxPoint(0,0), wxSize(width, height));
 150
 151     wxAlphaPixelData::Iterator p(pixData);
 152     for (int y=0; y<height; y++) {
 153         wxAlphaPixelData::Iterator rowStart = p;
 154         for (int x=0; x<width; x++) {
 155             unsigned char a = buffer[3];
 156             p.Red()   = a; buffer++;
 157             p.Green() = a; buffer++;
 158             p.Blue()  = a; buffer++;
 159             p.Alpha() = a; buffer++;
 160             ++p;
 161         }
 162         p = rowStart;
 163         p.OffsetY(pixData, 1);
 164     }
 165
 166     return bmp;
 167 #endif
 168 }
 169
 170 /*
 171  * wxClientDC
 172  */
 173
 174 wxClientDC::wxClientDC()
 175 {
 176     m_window = NULL ;
 177 }
 178
 179 wxClientDC::wxClientDC(wxWindow *window) :
 180     wxWindowDC( window )
 181 {
 182     wxCHECK_RET( window, _T("invalid window in wxClientDC") );
 183     wxPoint origin = window->GetClientAreaOrigin() ;
 184     m_window->GetClientSize( &m_width , &m_height);
 185     SetDeviceOrigin( origin.x, origin.y );
 186     SetClippingRegion( 0 , 0 , m_width , m_height ) ;
 187 }
 188
 189 wxClientDC::~wxClientDC()
 190 {
 191 }
 192
 193 /*
 194  * wxPaintDC
 195  */
 196
 197 wxPaintDC::wxPaintDC()
 198 {
 199     m_window = NULL ;
 200 }
 201
 202 wxPaintDC::wxPaintDC(wxWindow *window) :
 203     wxWindowDC( window )
 204 {
 205     wxPoint origin = window->GetClientAreaOrigin() ;
 206     m_window->GetClientSize( &m_width , &m_height);
 207     SetDeviceOrigin( origin.x, origin.y );
 208     SetClippingRegion( 0 , 0 , m_width , m_height ) ;
 209 }
 210
 211 wxPaintDC::~wxPaintDC()
 212 {
 213 }