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     ControlRef handle = (ControlRef) m_window->GetHandle();
 119     if ( !handle )
 120         return wxNullBitmap;
 121
 122     HIRect rect;
 123     CGImageRef image;
 124     CGContextRef context;
 125     void* data;
 126
 127     size_t bytesPerRow;
 128
 129     HIViewCreateOffscreenImage( handle, 0, &rect, &image);
 130
 131
 132     int width = subrect != NULL ? subrect->width : (int)rect.size.width;
 133     int height = subrect !=  NULL ? subrect->height : (int)rect.size.height ;
 134
 135     bytesPerRow = ( ( width * 8 * 4 + 7 ) / 8 );
 136
 137     data = calloc( 1, bytesPerRow * height );
 138     context = CGBitmapContextCreate( data, width, height, 8, bytesPerRow, CGColorSpaceCreateDeviceRGB(), kCGImageAlphaPremultipliedFirst );
 139
 140     if ( subrect )
 141         rect = CGRectOffset( rect, -subrect->x, -subrect->y ) ;
 142     CGContextDrawImage( context, rect, image );
 143
 144     unsigned char* buffer = (unsigned char*) data;
 145     wxBitmap bmp = wxBitmap(width, height, 32);
 146     wxAlphaPixelData pixData(bmp, wxPoint(0,0), wxSize(width, height));
 147
 148     wxAlphaPixelData::Iterator p(pixData);
 149     for (int y=0; y<height; y++) {
 150         wxAlphaPixelData::Iterator rowStart = p;
 151         for (int x=0; x<width; x++) {
 152             unsigned char a = buffer[3];
 153             p.Red()   = a; buffer++;
 154             p.Green() = a; buffer++;
 155             p.Blue()  = a; buffer++;
 156             p.Alpha() = a; buffer++;
 157             ++p;
 158         }
 159         p = rowStart;
 160         p.OffsetY(pixData, 1);
 161     }
 162
 163     return bmp;
 164 }
 165
 166 /*
 167  * wxClientDC
 168  */
 169
 170 wxClientDC::wxClientDC()
 171 {
 172     m_window = NULL ;
 173 }
 174
 175 wxClientDC::wxClientDC(wxWindow *window) :
 176     wxWindowDC( window )
 177 {
 178     wxCHECK_RET( window, _T("invalid window in wxClientDC") );
 179     wxPoint origin = window->GetClientAreaOrigin() ;
 180     m_window->GetClientSize( &m_width , &m_height);
 181     SetDeviceOrigin( origin.x, origin.y );
 182     SetClippingRegion( 0 , 0 , m_width , m_height ) ;
 183 }
 184
 185 wxClientDC::~wxClientDC()
 186 {
 187 }
 188
 189 /*
 190  * wxPaintDC
 191  */
 192
 193 wxPaintDC::wxPaintDC()
 194 {
 195     m_window = NULL ;
 196 }
 197
 198 wxPaintDC::wxPaintDC(wxWindow *window) :
 199     wxWindowDC( window )
 200 {
 201     wxPoint origin = window->GetClientAreaOrigin() ;
 202     m_window->GetClientSize( &m_width , &m_height);
 203     SetDeviceOrigin( origin.x, origin.y );
 204     SetClippingRegion( 0 , 0 , m_width , m_height ) ;
 205 }
 206
 207 wxPaintDC::~wxPaintDC()
 208 {
 209 }