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