on demand creation of native CGContexts , so that pure text measuring contexts don...

[wxWidgets.git] / src / mac / carbon / dcmemory.cpp

diff --git a/src/mac/carbon/dcmemory.cpp b/src/mac/carbon/dcmemory.cpp
index 20c371825af51e65a5c6f61b41befb7df171fee8..541ad66c4e8c1b7d7520b1015c64a86396f5a769 100644 (file)
--- a/src/mac/carbon/dcmemory.cpp
+++ b/src/mac/carbon/dcmemory.cpp
@@ -12,6 +12,7 @@
 #include "wx/wxprec.h"
 
 #include "wx/dcmemory.h"
+#include "wx/graphics.h"
 
 #include "wx/mac/private.h"
 
@@ -21,7 +22,7 @@
 
 IMPLEMENT_DYNAMIC_CLASS(wxMemoryDC,wxPaintDC)
 
-wxMemoryDC::wxMemoryDC()
+wxMemoryDC::wxMemoryDC( const wxBitmap& bitmap )
 : m_selected()
 {
     m_ok = true;
@@ -30,6 +31,9 @@ wxMemoryDC::wxMemoryDC()
     SetPen(*wxBLACK_PEN);
     SetFont(*wxNORMAL_FONT);
     m_ok = false;
+
+    if ( bitmap.IsOk() )
+        SelectObject(bitmap);
 }
 
 wxMemoryDC::wxMemoryDC( wxDC *WXUNUSED(dc) )
@@ -49,7 +53,7 @@ wxMemoryDC::~wxMemoryDC()
     {
 #if wxMAC_USE_CORE_GRAPHICS
         m_selected.EndRawAccess() ;
-        CGContextRef bmCtx = ((wxMacCGContext*)(m_graphicContext))->GetNativeContext() ;
+        CGContextRef bmCtx = (CGContextRef) m_graphicContext->GetNativeContext() ;
         delete m_graphicContext ;
         m_graphicContext = NULL ;
         CGContextRelease( bmCtx ) ;
@@ -65,7 +69,7 @@ void wxMemoryDC::SelectObject( const wxBitmap& bitmap )
     {
 #if wxMAC_USE_CORE_GRAPHICS
         m_selected.EndRawAccess() ;
-        CGContextRef bmCtx = ((wxMacCGContext*)(m_graphicContext))->GetNativeContext() ;
+        CGContextRef bmCtx = (CGContextRef) m_graphicContext->GetNativeContext() ;
         delete m_graphicContext ;
         m_graphicContext = NULL ;
         CGContextRelease( bmCtx ) ;
@@ -86,6 +90,8 @@ void wxMemoryDC::SelectObject( const wxBitmap& bitmap )
         int bytesPerPixel = 4 ;
         int w = bitmap.GetWidth() ;
         int h = bitmap.GetHeight() ;
+               m_width = w;
+               m_height = h;
 
         // TODO: should this be kCGImageAlphaPremultiplied[First,Last] ?
         CGImageAlphaInfo a = kCGImageAlphaNoneSkipFirst ;
@@ -102,7 +108,7 @@ void wxMemoryDC::SelectObject( const wxBitmap& bitmap )
             CGContextTranslateCTM( bmCtx , 0 ,  m_selected.GetHeight() ) ;
             CGContextScaleCTM( bmCtx , 1 , -1 ) ;
 
-            m_graphicContext = new wxMacCGContext( bmCtx ) ;
+                       SetGraphicsContext( wxGraphicsContext::CreateFromNative( bmCtx ) );
             m_graphicContext->SetPen( m_pen ) ;
             m_graphicContext->SetBrush( m_brush ) ;
             m_graphicContext->SetFont( m_font ) ;