src/mac/carbon/dcmemory.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/mac/carbon/dcmemory.cpp
   3 // Purpose:     wxMemoryDC 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/dcmemory.h"
  15
  16 #include "wx/mac/private.h"
  17
  18 //-----------------------------------------------------------------------------
  19 // wxMemoryDC
  20 //-----------------------------------------------------------------------------
  21
  22 IMPLEMENT_DYNAMIC_CLASS(wxMemoryDC,wxPaintDC)
  23
  24 wxMemoryDC::wxMemoryDC( const wxBitmap& bitmap )
  25 : m_selected()
  26 {
  27     m_ok = true;
  28     SetBackground(*wxWHITE_BRUSH);
  29     SetBrush(*wxWHITE_BRUSH);
  30     SetPen(*wxBLACK_PEN);
  31     SetFont(*wxNORMAL_FONT);
  32     m_ok = false;
  33
  34     if ( bitmap.IsOk() )
  35         SelectObject(bitmap);
  36 }
  37
  38 wxMemoryDC::wxMemoryDC( wxDC *WXUNUSED(dc) )
  39 : m_selected()
  40 {
  41     m_ok = true;
  42     SetBackground(*wxWHITE_BRUSH);
  43     SetBrush(*wxWHITE_BRUSH);
  44     SetPen(*wxBLACK_PEN);
  45     SetFont(*wxNORMAL_FONT);
  46     m_ok = false;
  47 }
  48
  49 wxMemoryDC::~wxMemoryDC()
  50 {
  51     if ( m_selected.Ok() )
  52     {
  53 #if wxMAC_USE_CORE_GRAPHICS
  54         m_selected.EndRawAccess() ;
  55         CGContextRef bmCtx = (CGContextRef) m_graphicContext->GetNativeContext() ;
  56         delete m_graphicContext ;
  57         m_graphicContext = NULL ;
  58         CGContextRelease( bmCtx ) ;
  59 #else
  60 // TODO: UnlockPixels( GetGWorldPixMap(MAC_WXHBITMAP(m_selected.GetHBITMAP())) );
  61 #endif
  62     }
  63 }
  64
  65 void wxMemoryDC::SelectObject( const wxBitmap& bitmap )
  66 {
  67     if ( m_selected.Ok() )
  68     {
  69 #if wxMAC_USE_CORE_GRAPHICS
  70         m_selected.EndRawAccess() ;
  71         CGContextRef bmCtx = (CGContextRef) m_graphicContext->GetNativeContext() ;
  72         delete m_graphicContext ;
  73         m_graphicContext = NULL ;
  74         CGContextRelease( bmCtx ) ;
  75 #else
  76 // TODO: UnlockPixels( GetGWorldPixMap(MAC_WXHBITMAP(m_selected.GetHBITMAP())) );
  77 #endif
  78     }
  79
  80     m_selected = bitmap;
  81     if (m_selected.Ok())
  82     {
  83 #if wxMAC_USE_CORE_GRAPHICS
  84         if ( m_selected.GetDepth() != 1 )
  85             m_selected.UseAlpha() ;
  86         void * data = m_selected.BeginRawAccess() ;
  87
  88         int bitsPerComp = 8 ;
  89         int bytesPerPixel = 4 ;
  90         int w = bitmap.GetWidth() ;
  91         int h = bitmap.GetHeight() ;
  92                 m_width = w;
  93                 m_height = h;
  94
  95         // TODO: should this be kCGImageAlphaPremultiplied[First,Last] ?
  96         CGImageAlphaInfo a = kCGImageAlphaNoneSkipFirst ;
  97
  98         CGColorSpaceRef genericColorSpace  = wxMacGetGenericRGBColorSpace();
  99         CGContextRef bmCtx = CGBitmapContextCreate( data , w, h, bitsPerComp , bytesPerPixel * w , genericColorSpace, a );
 100         wxASSERT_MSG( bmCtx , wxT("Unable to create bitmap context") ) ;
 101
 102         if ( bmCtx )
 103         {
 104             CGContextSetFillColorSpace( bmCtx, genericColorSpace );
 105             CGContextSetStrokeColorSpace( bmCtx, genericColorSpace );
 106
 107             CGContextTranslateCTM( bmCtx , 0 ,  m_selected.GetHeight() ) ;
 108             CGContextScaleCTM( bmCtx , 1 , -1 ) ;
 109
 110                         SetGraphicsContext( wxGraphicsContext::CreateFromNative( bmCtx ) );
 111             m_graphicContext->SetPen( m_pen ) ;
 112             m_graphicContext->SetBrush( m_brush ) ;
 113             m_graphicContext->SetFont( m_font ) ;
 114         }
 115         m_ok = (m_graphicContext != NULL) ;
 116
 117 #else
 118         m_macPort = m_selected.GetHBITMAP( &m_macMask ) ;
 119         m_ok = (m_macPort != NULL) ;
 120         if (m_ok)
 121         {
 122             LockPixels( GetGWorldPixMap( (CGrafPtr) m_macPort ) ) ;
 123             SetRectRgn( (RgnHandle) m_macBoundaryClipRgn , 0 , 0 , m_selected.GetWidth() , m_selected.GetHeight() ) ;
 124             CopyRgn( (RgnHandle) m_macBoundaryClipRgn , (RgnHandle) m_macCurrentClipRgn ) ;
 125         }
 126 #endif
 127     }
 128     else
 129     {
 130         m_ok = false;
 131     }
 132 }
 133
 134 void wxMemoryDC::DoGetSize( int *width, int *height ) const
 135 {
 136     if (m_selected.Ok())
 137     {
 138         if (width)
 139             (*width) = m_selected.GetWidth();
 140         if (height)
 141             (*height) = m_selected.GetHeight();
 142     }
 143     else
 144     {
 145         if (width)
 146             (*width) = 0;
 147         if (height)
 148             (*height) = 0;
 149     }
 150 }