Added licence/copyright information

[wxWidgets.git] / src / msw / dcmemory.cpp

diff --git a/src/msw/dcmemory.cpp b/src/msw/dcmemory.cpp
index f3de3b4b4afac45464e1ceeb42d3fdf8e7de44a4..f93d3b796274ddc7f16563a60463f135b5fdb1d6 100644 (file)
--- a/src/msw/dcmemory.cpp
+++ b/src/msw/dcmemory.cpp
@@ -5,125 +5,206 @@
 // Modified by:
 // Created:     01/02/97
 // RCS-ID:      $Id$
 // Modified by:
 // Created:     01/02/97
 // RCS-ID:      $Id$

-// Copyright:   (c) Julian Smart and Markus Holzem
-// Licence:    wxWindows licence
+// Copyright:   (c) Julian Smart
+// Licence:     wxWindows licence

 /////////////////////////////////////////////////////////////////////////////
 
 /////////////////////////////////////////////////////////////////////////////
 

-#ifdef __GNUG__
-#pragma implementation "dcmemory.h"
+// ============================================================================
+// declarations
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
+
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
+    #pragma implementation "dcmemory.h"

 #endif
 
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
 #ifdef __BORLANDC__
 #endif
 
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
 #ifdef __BORLANDC__

-#pragma hdrstop
+    #pragma hdrstop

 #endif
 
 #ifndef WX_PRECOMP
 #endif
 
 #ifndef WX_PRECOMP

-#include "wx/utils.h"
+    #include "wx/utils.h"
+    #include "wx/log.h"

 #endif
 
 #endif
 

+#include "wx/msw/private.h"
+

 #include "wx/dcmemory.h"
 
 #include "wx/dcmemory.h"
 

-#include <windows.h>
+// ----------------------------------------------------------------------------
+// wxWin macros
+// ----------------------------------------------------------------------------

 
 

-#if !USE_SHARED_LIBRARY

 IMPLEMENT_DYNAMIC_CLASS(wxMemoryDC, wxDC)
 IMPLEMENT_DYNAMIC_CLASS(wxMemoryDC, wxDC)

-#endif

 
 

-/*
- * Memory DC
- *
- */
+// ============================================================================
+// implementation
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// wxMemoryDC
+// ----------------------------------------------------------------------------

 
 

-wxMemoryDC::wxMemoryDC(void)
+wxMemoryDC::wxMemoryDC()

 {
 {

-  m_hDC = (WXHDC) ::CreateCompatibleDC(NULL);
-  m_ok = (m_hDC != 0);
-  m_bOwnsDC = TRUE;
+    CreateCompatible(NULL);

 
 

-  SetBrush(*wxWHITE_BRUSH);
-  SetPen(*wxBLACK_PEN);
+    Init();

 }
 
 }
 

-wxMemoryDC::wxMemoryDC(wxDC *old_dc)
+wxMemoryDC::wxMemoryDC(wxDC *dc)

 {
 {

-  old_dc->BeginDrawing();
+    wxCHECK_RET( dc, _T("NULL dc in wxMemoryDC ctor") );
+
+    dc->BeginDrawing();

 
 

-  m_hDC = (WXHDC) ::CreateCompatibleDC((HDC) old_dc->GetHDC());
-  m_ok = (m_hDC != 0);
+    CreateCompatible(dc);

 
 

-  old_dc->EndDrawing();
+    dc->EndDrawing();

 
 

-  SetBrush(*wxWHITE_BRUSH);
-  SetPen(*wxBLACK_PEN);
+    Init();
+}
+
+void wxMemoryDC::Init()
+{
+    if ( m_ok )
+    {
+        SetBrush(*wxWHITE_BRUSH);
+        SetPen(*wxBLACK_PEN);
+
+        // the background mode is only used for text background and is set in
+        // DrawText() to OPAQUE as required, otherwise always TRANSPARENT
+        ::SetBkMode( GetHdc(), TRANSPARENT );
+    }

 }
 
 }
 

-wxMemoryDC::~wxMemoryDC(void)
+bool wxMemoryDC::CreateCompatible(wxDC *dc)

 {
 {

+    m_hDC = (WXHDC)::CreateCompatibleDC(dc ? GetHdcOf(*dc) : NULL);
+
+    // as we created the DC, we must delete it in the dtor
+    m_bOwnsDC = true;
+
+    m_ok = m_hDC != 0;
+
+    return m_ok;

 }
 
 void wxMemoryDC::SelectObject(const wxBitmap& bitmap)
 {
 }
 
 void wxMemoryDC::SelectObject(const wxBitmap& bitmap)
 {

-  // Select old bitmap out of the device context
-  if (m_oldBitmap)
-  {
-    ::SelectObject((HDC) m_hDC, (HBITMAP) m_oldBitmap);
-    if (m_selectedBitmap.Ok())
+    // select old bitmap out of the device context
+    if ( m_oldBitmap )
+    {
+        ::SelectObject(GetHdc(), (HBITMAP) m_oldBitmap);
+        if ( m_selectedBitmap.Ok() )
+        {
+#ifdef __WXDEBUG__
+            m_selectedBitmap.SetSelectedInto(NULL);
+#endif
+            m_selectedBitmap = wxNullBitmap;
+        }
+    }
+
+    // check for whether the bitmap is already selected into a device context
+    wxASSERT_MSG( !bitmap.GetSelectedInto() ||
+                  (bitmap.GetSelectedInto() == this),
+                  wxT("Bitmap is selected in another wxMemoryDC, delete the first wxMemoryDC or use SelectObject(NULL)") );
+
+    m_selectedBitmap = bitmap;
+    WXHBITMAP hBmp = m_selectedBitmap.GetHBITMAP();
+    if ( !hBmp )
+        return;
+
+#ifdef __WXDEBUG__
+    m_selectedBitmap.SetSelectedInto(this);
+#endif
+    hBmp = (WXHBITMAP)::SelectObject(GetHdc(), (HBITMAP)hBmp);
+
+    if ( !hBmp )
+    {
+        wxLogLastError(wxT("SelectObject(memDC, bitmap)"));
+
+        wxFAIL_MSG(wxT("Couldn't select a bitmap into wxMemoryDC"));
+    }
+    else if ( !m_oldBitmap )
+    {
+        m_oldBitmap = hBmp;
+    }
+}
+
+void wxMemoryDC::DoGetSize(int *width, int *height) const
+{
+    if ( m_selectedBitmap.Ok() )
+    {
+        *width = m_selectedBitmap.GetWidth();
+        *height = m_selectedBitmap.GetHeight();
+    }
+    else
+    {
+        *width = 0;
+        *height = 0;
+    }
+}
+
+// the rest of this file deals with drawing rectangles workaround, disabled by
+// default
+
+#define wxUSE_MEMORY_DC_DRAW_RECTANGLE 0
+
+#if wxUSE_MEMORY_DC_DRAW_RECTANGLE
+
+// For some reason, drawing a rectangle on a memory DC has problems.
+// Use this substitute if we can.
+static void wxDrawRectangle(wxDC& dc, wxCoord x, wxCoord y, wxCoord width, wxCoord height)
+{
+    wxBrush brush(dc.GetBrush());
+    wxPen pen(dc.GetPen());
+    if (brush.Ok() && brush.GetStyle() != wxTRANSPARENT)
+    {
+        HBRUSH hBrush = (HBRUSH) brush.GetResourceHandle() ;
+        if (hBrush)
+        {
+            RECT rect;
+            rect.left = x; rect.top = y;
+            rect.right = x + width - 1;
+            rect.bottom = y + height - 1;
+            ::FillRect((HDC) dc.GetHDC(), &rect, hBrush);
+        }
+    }
+    width --; height --;
+    if (pen.Ok() && pen.GetStyle() != wxTRANSPARENT)

     {
     {

-      m_selectedBitmap.SetSelectedInto(NULL);
-      m_selectedBitmap = wxNullBitmap;
+        dc.DrawLine(x, y, x + width, y);
+        dc.DrawLine(x, y, x, y + height);
+        dc.DrawLine(x, y+height, x+width, y + height);
+        dc.DrawLine(x+width, y+height, x+width, y);

     }
     }

-  }
-
-  // Do own check for whether the bitmap is already selected into
-  // a device context
-  if (bitmap.GetSelectedInto() && (bitmap.GetSelectedInto() != this))
-  {
-    wxFatalError("Error in wxMemoryDC::SelectObject\nBitmap is selected in another wxMemoryDC.\nDelete the first wxMemoryDC or use SelectObject(NULL)");
-    return;
-  }
-
-  // Check if the bitmap has the correct depth for this device context
-//  if (bitmap.Ok() && (bitmap.GetDepth() != GetDepth()))
-  // JACS 11/12/98: disabling this since the Forty Thieves sample
-  // shows this not working properly. In fact, if loading from a resource,
-  // the depth should become the screen depth, so why was it being called?
-  if (0)
-  {
-      // Make a new bitmap that has the correct depth.
-      wxBitmap newBitmap = bitmap.GetBitmapForDC(* this);
-
-      m_selectedBitmap = newBitmap ;
-  }
-  else
-  {
-      m_selectedBitmap = bitmap;
-  }
-
-  if (!m_selectedBitmap.Ok())
-    return;
-
-  m_selectedBitmap.SetSelectedInto(this);
-  HBITMAP bm = (HBITMAP) ::SelectObject((HDC) m_hDC, (HBITMAP) m_selectedBitmap.GetHBITMAP());
-
-  if (bm == ERROR)
-  {
-    wxFatalError("Error in wxMemoryDC::SelectObject\nBitmap may not be loaded, or may be selected in another wxMemoryDC.\nDelete the first wxMemoryDC to deselect bitmap.");
-  }
-  else if (!m_oldBitmap)
-    m_oldBitmap = (WXHBITMAP) bm;

 }
 
 }
 

-void wxMemoryDC::GetSize(int *width, int *height) const
+#endif // wxUSE_MEMORY_DC_DRAW_RECTANGLE
+
+void wxMemoryDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)

 {
 {

-  if (!m_selectedBitmap.Ok())
-  {
-    *width = 0; *height = 0;
-    return;
-  }
-  *width = m_selectedBitmap.GetWidth();
-  *height = m_selectedBitmap.GetHeight();
+    // Set this to 1 to work around an apparent video driver bug
+    // (visible with e.g. 70x70 rectangle on a memory DC; see Drawing sample)
+#if wxUSE_MEMORY_DC_DRAW_RECTANGLE
+    if (m_brush.Ok() && m_pen.Ok() &&
+        (m_brush.GetStyle() == wxSOLID || m_brush.GetStyle() == wxTRANSPARENT) &&
+        (m_pen.GetStyle() == wxSOLID || m_pen.GetStyle() == wxTRANSPARENT) &&
+        (GetLogicalFunction() == wxCOPY))
+    {
+        wxDrawRectangle(* this, x, y, width, height);
+    }
+    else
+#endif // wxUSE_MEMORY_DC_DRAW_RECTANGLE
+    {
+        wxDC::DoDrawRectangle(x, y, width, height);
+    }

 }
 
 }