some wxArtProv docs

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

diff --git a/src/msw/dc.cpp b/src/msw/dc.cpp
index 721a1fb3c7562cd85ff0deb67d90a2083a320201..09d21ad3d03a48040fd1e786f42e600422756cdc 100644 (file)
--- a/src/msw/dc.cpp
+++ b/src/msw/dc.cpp
@@ -49,7 +49,7 @@
 
 #include "wx/msw/private.h" // needs to be before #include <commdlg.h>
 
 
 #include "wx/msw/private.h" // needs to be before #include <commdlg.h>
 

-#if wxUSE_COMMON_DIALOGS
+#if wxUSE_COMMON_DIALOGS && !defined(__WXMICROWIN__)

     #include <commdlg.h>
 #endif
 
     #include <commdlg.h>
 #endif
 


@@ -77,6 +77,25 @@ static const int MM_METRIC = 10;
 // MSDN docs for how this and other numbers in wxDC::Blit() are obtained)
 #define DSTCOPY 0x00AA0029      // a.k.a. NOP operation
 
 // MSDN docs for how this and other numbers in wxDC::Blit() are obtained)
 #define DSTCOPY 0x00AA0029      // a.k.a. NOP operation
 

+// ----------------------------------------------------------------------------
+// macros for logical <-> device coords conversion
+// ----------------------------------------------------------------------------
+
+/*
+   We currently let Windows do all the translations itself so these macros are
+   not really needed (any more) but keep them to enhance readability of the
+   code by allowing to see where are the logical and where are the device
+   coordinates used.
+ */
+
+// logical to device
+#define XLOG2DEV(x) (x)
+#define YLOG2DEV(y) (y)
+
+// device to logical
+#define XDEV2LOG(x) (x)
+#define YDEV2LOG(y) (y)
+

 // ---------------------------------------------------------------------------
 // private functions
 // ---------------------------------------------------------------------------
 // ---------------------------------------------------------------------------
 // private functions
 // ---------------------------------------------------------------------------


@@ -118,7 +137,8 @@ private:
 
 wxColourChanger::wxColourChanger(wxDC& dc) : m_dc(dc)
 {
 
 wxColourChanger::wxColourChanger(wxDC& dc) : m_dc(dc)
 {

-    if ( dc.GetBrush().GetStyle() == wxSTIPPLE_MASK_OPAQUE )
+    const wxBrush& brush = dc.GetBrush();
+    if ( brush.Ok() && brush.GetStyle() == wxSTIPPLE_MASK_OPAQUE )

     {
         HDC hdc = GetHdcOf(dc);
         m_colFgOld = ::GetTextColor(hdc);
     {
         HDC hdc = GetHdcOf(dc);
         m_colFgOld = ::GetTextColor(hdc);


@@ -178,16 +198,14 @@ wxDC::wxDC()
     m_oldPen = 0;
     m_oldBrush = 0;
     m_oldFont = 0;
     m_oldPen = 0;
     m_oldBrush = 0;
     m_oldFont = 0;

+#if wxUSE_PALETTE

     m_oldPalette = 0;
     m_oldPalette = 0;

+#endif // wxUSE_PALETTE

 
     m_bOwnsDC = FALSE;
     m_hDC = 0;
 
     m_bOwnsDC = FALSE;
     m_hDC = 0;

-
-    m_windowExtX = VIEWPORT_EXTENT;
-    m_windowExtY = VIEWPORT_EXTENT;

 }
 
 }
 

-

 wxDC::~wxDC()
 {
     if ( m_hDC != 0 )
 wxDC::~wxDC()
 {
     if ( m_hDC != 0 )


@@ -246,16 +264,21 @@ void wxDC::SelectOldObjects(WXHDC dc)
             ::SelectObject((HDC) dc, (HFONT) m_oldFont);
         }
         m_oldFont = 0;
             ::SelectObject((HDC) dc, (HFONT) m_oldFont);
         }
         m_oldFont = 0;

+
+#if wxUSE_PALETTE

         if (m_oldPalette)
         {
         if (m_oldPalette)
         {

-            ::SelectPalette((HDC) dc, (HPALETTE) m_oldPalette, TRUE);
+            ::SelectPalette((HDC) dc, (HPALETTE) m_oldPalette, FALSE);

         }
         m_oldPalette = 0;
         }
         m_oldPalette = 0;

+#endif // wxUSE_PALETTE

     }
 
     m_brush = wxNullBrush;
     m_pen = wxNullPen;
     }
 
     m_brush = wxNullBrush;
     m_pen = wxNullPen;

+#if wxUSE_PALETTE

     m_palette = wxNullPalette;
     m_palette = wxNullPalette;

+#endif // wxUSE_PALETTE

     m_font = wxNullFont;
     m_backgroundBrush = wxNullBrush;
     m_selectedBitmap = wxNullBitmap;
     m_font = wxNullFont;
     m_backgroundBrush = wxNullBrush;
     m_selectedBitmap = wxNullBitmap;


@@ -270,9 +293,9 @@ void wxDC::UpdateClipBox()
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif

-    
+

     RECT rect;
     RECT rect;

-    GetClipBox(GetHdc(), &rect);
+    ::GetClipBox(GetHdc(), &rect);

 
     m_clipX1 = (wxCoord) XDEV2LOG(rect.left);
     m_clipY1 = (wxCoord) YDEV2LOG(rect.top);
 
     m_clipX1 = (wxCoord) XDEV2LOG(rect.left);
     m_clipY1 = (wxCoord) YDEV2LOG(rect.top);


@@ -280,14 +303,50 @@ void wxDC::UpdateClipBox()
     m_clipY2 = (wxCoord) YDEV2LOG(rect.bottom);
 }
 
     m_clipY2 = (wxCoord) YDEV2LOG(rect.bottom);
 }
 

-void wxDC::DoSetClippingRegion(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
+// common part of DoSetClippingRegion() and DoSetClippingRegionAsRegion()
+void wxDC::SetClippingHrgn(WXHRGN hrgn)

 {
 {

+    wxCHECK_RET( hrgn, wxT("invalid clipping region") );
+

 #ifdef __WXMICROWIN__
 #ifdef __WXMICROWIN__

-    if (!GetHDC()) return;
-#endif
-    
+    if (!GetHdc()) return;
+#endif // __WXMICROWIN__
+
+    // note that we combine the new clipping region with the existing one: this
+    // is compatible with what the other ports do and is the documented
+    // behaviour now (starting with 2.3.3)
+#ifdef __WIN16__
+    RECT rectClip;
+    if ( !::GetClipBox(GetHdc(), &rectClip) )
+        return;
+
+    HRGN hrgnDest = ::CreateRectRgn(0, 0, 0, 0);
+    HRGN hrgnClipOld = ::CreateRectRgn(rectClip.left, rectClip.top,
+                                       rectClip.right, rectClip.bottom);
+
+    if ( ::CombineRgn(hrgnDest, hrgnClipOld, (HRGN)hrgn, RGN_AND) != ERROR )
+    {
+        ::SelectClipRgn(GetHdc(), hrgnDest);
+    }
+
+    ::DeleteObject(hrgnClipOld);
+    ::DeleteObject(hrgnDest);
+#else // Win32
+    if ( ::ExtSelectClipRgn(GetHdc(), (HRGN)hrgn, RGN_AND) == ERROR )
+    {
+        wxLogLastError(_T("ExtSelectClipRgn"));
+
+        return;
+    }
+#endif // Win16/32
+

     m_clipping = TRUE;
 
     m_clipping = TRUE;
 

+    UpdateClipBox();
+}
+
+void wxDC::DoSetClippingRegion(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
+{

     // the region coords are always the device ones, so do the translation
     // manually
     //
     // the region coords are always the device ones, so do the translation
     // manually
     //


@@ -302,33 +361,15 @@ void wxDC::DoSetClippingRegion(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
     }
     else
     {
     }
     else
     {

-        if ( ::SelectClipRgn(GetHdc(), hrgn) == ERROR )
-        {
-            wxLogLastError(_T("SelectClipRgn"));
-        }
-        DeleteObject(hrgn);
+        SetClippingHrgn((WXHRGN)hrgn);

 
 

-        UpdateClipBox();
+        ::DeleteObject(hrgn);

     }
 }
 
 void wxDC::DoSetClippingRegionAsRegion(const wxRegion& region)
 {
     }
 }
 
 void wxDC::DoSetClippingRegionAsRegion(const wxRegion& region)
 {

-#ifdef __WXMICROWIN__
-    if (!GetHDC()) return;
-#endif
-    
-    wxCHECK_RET( GetHrgnOf(region), wxT("invalid clipping region") );
-
-    m_clipping = TRUE;
-
-#ifdef __WIN16__
-    SelectClipRgn(GetHdc(), GetHrgnOf(region));
-#else // Win32
-    ExtSelectClipRgn(GetHdc(), GetHrgnOf(region), RGN_AND);
-#endif // Win16/32
-
-    UpdateClipBox();
+    SetClippingHrgn(region.GetHRGN());

 }
 
 void wxDC::DestroyClippingRegion()
 }
 
 void wxDC::DestroyClippingRegion()


@@ -336,15 +377,16 @@ void wxDC::DestroyClippingRegion()
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif

-    
+

     if (m_clipping && m_hDC)
     {
         // TODO: this should restore the previous clipping region,
     if (m_clipping && m_hDC)
     {
         // TODO: this should restore the previous clipping region,

-        // so that OnPaint processing works correctly, and the update clipping region
-        // doesn't get destroyed after the first DestroyClippingRegion.
+        //       so that OnPaint processing works correctly, and the update
+        //       clipping region doesn't get destroyed after the first
+        //       DestroyClippingRegion.

         HRGN rgn = CreateRectRgn(0, 0, 32000, 32000);
         HRGN rgn = CreateRectRgn(0, 0, 32000, 32000);

-        SelectClipRgn(GetHdc(), rgn);
-        DeleteObject(rgn);
+        ::SelectClipRgn(GetHdc(), rgn);
+        ::DeleteObject(rgn);

     }
 
     m_clipping = FALSE;
     }
 
     m_clipping = FALSE;


@@ -377,7 +419,7 @@ int wxDC::GetDepth() const
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return 16;
 #endif
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return 16;
 #endif

-    
+

     return (int)::GetDeviceCaps(GetHdc(), BITSPIXEL);
 }
 
     return (int)::GetDeviceCaps(GetHdc(), BITSPIXEL);
 }
 


@@ -390,7 +432,7 @@ void wxDC::Clear()
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif

-    
+

     RECT rect;
     if ( m_canvas )
     {
     RECT rect;
     if ( m_canvas )
     {


@@ -411,14 +453,17 @@ void wxDC::Clear()
 
     (void) ::SetMapMode(GetHdc(), MM_TEXT);
 
 
     (void) ::SetMapMode(GetHdc(), MM_TEXT);
 

-    DWORD colour = GetBkColor(GetHdc());
-    HBRUSH brush = CreateSolidBrush(colour);
-    FillRect(GetHdc(), &rect, brush);
-    DeleteObject(brush);
+    DWORD colour = ::GetBkColor(GetHdc());
+    HBRUSH brush = ::CreateSolidBrush(colour);
+    ::FillRect(GetHdc(), &rect, brush);
+    ::DeleteObject(brush);
+
+    int width = DeviceToLogicalXRel(VIEWPORT_EXTENT)*m_signX,
+        height = DeviceToLogicalYRel(VIEWPORT_EXTENT)*m_signY;

 
     ::SetMapMode(GetHdc(), MM_ANISOTROPIC);
     ::SetViewportExtEx(GetHdc(), VIEWPORT_EXTENT, VIEWPORT_EXTENT, NULL);
 
     ::SetMapMode(GetHdc(), MM_ANISOTROPIC);
     ::SetViewportExtEx(GetHdc(), VIEWPORT_EXTENT, VIEWPORT_EXTENT, NULL);

-    ::SetWindowExtEx(GetHdc(), m_windowExtX, m_windowExtY, NULL);
+    ::SetWindowExtEx(GetHdc(), width, height, NULL);

     ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
     ::SetWindowOrgEx(GetHdc(), (int)m_logicalOriginX, (int)m_logicalOriginY, NULL);
 }
     ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
     ::SetWindowOrgEx(GetHdc(), (int)m_logicalOriginX, (int)m_logicalOriginY, NULL);
 }


@@ -428,7 +473,7 @@ void wxDC::DoFloodFill(wxCoord x, wxCoord y, const wxColour& col, int style)
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif

-    
+

     if ( !::ExtFloodFill(GetHdc(), XLOG2DEV(x), YLOG2DEV(y),
                          col.GetPixel(),
                          style == wxFLOOD_SURFACE ? FLOODFILLSURFACE
     if ( !::ExtFloodFill(GetHdc(), XLOG2DEV(x), YLOG2DEV(y),
                          col.GetPixel(),
                          style == wxFLOOD_SURFACE ? FLOODFILLSURFACE


@@ -457,7 +502,7 @@ bool wxDC::DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return FALSE;
 #endif
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return FALSE;
 #endif

-    
+

     wxCHECK_MSG( col, FALSE, _T("NULL colour parameter in wxDC::GetPixel") );
 
     // get the color of the pixel
     wxCHECK_MSG( col, FALSE, _T("NULL colour parameter in wxDC::GetPixel") );
 
     // get the color of the pixel


@@ -473,7 +518,7 @@ void wxDC::DoCrossHair(wxCoord x, wxCoord y)
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif

-    
+

     wxCoord x1 = x-VIEWPORT_EXTENT;
     wxCoord y1 = y-VIEWPORT_EXTENT;
     wxCoord x2 = x+VIEWPORT_EXTENT;
     wxCoord x1 = x-VIEWPORT_EXTENT;
     wxCoord y1 = y-VIEWPORT_EXTENT;
     wxCoord x2 = x+VIEWPORT_EXTENT;


@@ -494,14 +539,10 @@ void wxDC::DoDrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2)
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif

-    
+

     (void)MoveToEx(GetHdc(), XLOG2DEV(x1), YLOG2DEV(y1), NULL);
     (void)LineTo(GetHdc(), XLOG2DEV(x2), YLOG2DEV(y2));
 
     (void)MoveToEx(GetHdc(), XLOG2DEV(x1), YLOG2DEV(y1), NULL);
     (void)LineTo(GetHdc(), XLOG2DEV(x2), YLOG2DEV(y2));
 

-    // Normalization: Windows doesn't draw the last point of the line.
-    // But apparently neither does GTK+, so we take it out again.
-//    (void)LineTo(GetHdc(), XLOG2DEV(x2) + 1, YLOG2DEV(y2));
-

     CalcBoundingBox(x1, y1);
     CalcBoundingBox(x2, y2);
 }
     CalcBoundingBox(x1, y1);
     CalcBoundingBox(x2, y2);
 }


@@ -515,7 +556,7 @@ void wxDC::DoDrawArc(wxCoord x1, wxCoord y1,
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif

-    
+

     wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
 
     double dx = xc - x1;
     wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
 
     double dx = xc - x1;


@@ -567,7 +608,7 @@ void wxDC::DoDrawCheckMark(wxCoord x1, wxCoord y1,
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif

-    
+

     wxCoord x2 = x1 + width,
             y2 = y1 + height;
 
     wxCoord x2 = x1 + width,
             y2 = y1 + height;
 


@@ -605,7 +646,7 @@ void wxDC::DoDrawPoint(wxCoord x, wxCoord y)
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif

-    
+

     COLORREF color = 0x00ffffff;
     if (m_pen.Ok())
     {
     COLORREF color = 0x00ffffff;
     if (m_pen.Ok())
     {


@@ -622,7 +663,7 @@ void wxDC::DoDrawPolygon(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffs
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif

-    
+

     wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
 
     // Do things less efficiently if we have offsets
     wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
 
     // Do things less efficiently if we have offsets


@@ -659,7 +700,7 @@ void wxDC::DoDrawLines(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif

-    
+

     // Do things less efficiently if we have offsets
     if (xoffset != 0 || yoffset != 0)
     {
     // Do things less efficiently if we have offsets
     if (xoffset != 0 || yoffset != 0)
     {


@@ -690,7 +731,7 @@ void wxDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif

-    
+

     wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
 
     wxCoord x2 = x + width;
     wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
 
     wxCoord x2 = x + width;


@@ -731,7 +772,7 @@ void wxDC::DoDrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord h
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif

-    
+

     wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
 
     // Now, a negative radius value is interpreted to mean
     wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
 
     // Now, a negative radius value is interpreted to mean


@@ -771,7 +812,7 @@ void wxDC::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif

-    
+

     wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
 
     wxCoord x2 = (x+width);
     wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
 
     wxCoord x2 = (x+width);


@@ -789,7 +830,7 @@ void wxDC::DoDrawEllipticArc(wxCoord x,wxCoord y,wxCoord w,wxCoord h,double sa,d
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif

-    
+

     wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
 
     wxCoord x2 = x + w;
     wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
 
     wxCoord x2 = x + w;


@@ -836,7 +877,7 @@ void wxDC::DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y)
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif

-    
+

     wxCHECK_RET( icon.Ok(), wxT("invalid icon in DrawIcon") );
 
 #ifdef __WIN32__
     wxCHECK_RET( icon.Ok(), wxT("invalid icon in DrawIcon") );
 
 #ifdef __WIN32__


@@ -854,7 +895,7 @@ void wxDC::DoDrawBitmap( const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif

-    
+

     wxCHECK_RET( bmp.Ok(), _T("invalid bitmap in wxDC::DrawBitmap") );
 
     int width = bmp.GetWidth(),
     wxCHECK_RET( bmp.Ok(), _T("invalid bitmap in wxDC::DrawBitmap") );
 
     int width = bmp.GetWidth(),


@@ -862,6 +903,10 @@ void wxDC::DoDrawBitmap( const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask
 
     HBITMAP hbmpMask = 0;
 
 
     HBITMAP hbmpMask = 0;
 

+#if wxUSE_PALETTE
+    HPALETTE oldPal = 0;
+#endif // wxUSE_PALETTE
+

     if ( useMask )
     {
         wxMask *mask = bmp.GetMask();
     if ( useMask )
     {
         wxMask *mask = bmp.GetMask();


@@ -875,7 +920,6 @@ void wxDC::DoDrawBitmap( const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask
             useMask = FALSE;
         }
     }
             useMask = FALSE;
         }
     }

-

     if ( useMask )
     {
 #ifdef __WIN32__
     if ( useMask )
     {
 #ifdef __WIN32__


@@ -889,13 +933,29 @@ void wxDC::DoDrawBitmap( const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask
         if (wxSystemOptions::GetOptionInt(wxT("no-maskblt")) == 0)
 #endif
         {
         if (wxSystemOptions::GetOptionInt(wxT("no-maskblt")) == 0)
 #endif
         {

+            HDC cdc = GetHdc();

             HDC hdcMem = ::CreateCompatibleDC(GetHdc());
             HDC hdcMem = ::CreateCompatibleDC(GetHdc());

-            ::SelectObject(hdcMem, GetHbitmapOf(bmp));
+            HGDIOBJ hOldBitmap = ::SelectObject(hdcMem, GetHbitmapOf(bmp));
+#if wxUSE_PALETTE
+            wxPalette *pal = bmp.GetPalette();
+            if ( pal && ::GetDeviceCaps(cdc,BITSPIXEL) <= 8 )
+            {
+                oldPal = ::SelectPalette(hdcMem, GetHpaletteOf(*pal), FALSE);
+                ::RealizePalette(hdcMem);
+            }
+#endif // wxUSE_PALETTE

 
 

-            ok = ::MaskBlt(GetHdc(), x, y, width, height,
+            ok = ::MaskBlt(cdc, x, y, width, height,

                             hdcMem, 0, 0,
                             hbmpMask, 0, 0,
                             MAKEROP4(SRCCOPY, DSTCOPY)) != 0;
                             hdcMem, 0, 0,
                             hbmpMask, 0, 0,
                             MAKEROP4(SRCCOPY, DSTCOPY)) != 0;

+
+#if wxUSE_PALETTE
+            if (oldPal)
+                ::SelectPalette(hdcMem, oldPal, FALSE);
+#endif // wxUSE_PALETTE
+
+            ::SelectObject(hdcMem, hOldBitmap);

             ::DeleteDC(hdcMem);
         }
 
             ::DeleteDC(hdcMem);
         }
 


@@ -931,8 +991,24 @@ void wxDC::DoDrawBitmap( const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask
             ::SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
         }
 
             ::SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
         }
 

-        ::SelectObject( memdc, hbitmap );
+#if wxUSE_PALETTE
+        wxPalette *pal = bmp.GetPalette();
+        if ( pal && ::GetDeviceCaps(cdc,BITSPIXEL) <= 8 )
+        {
+            oldPal = ::SelectPalette(memdc, GetHpaletteOf(*pal), FALSE);
+            ::RealizePalette(memdc);
+        }
+#endif // wxUSE_PALETTE
+
+        HGDIOBJ hOldBitmap = ::SelectObject( memdc, hbitmap );

         ::BitBlt( cdc, x, y, width, height, memdc, 0, 0, SRCCOPY);
         ::BitBlt( cdc, x, y, width, height, memdc, 0, 0, SRCCOPY);

+
+#if wxUSE_PALETTE
+        if (oldPal)
+            ::SelectPalette(memdc, oldPal, FALSE);
+#endif // wxUSE_PALETTE
+
+        ::SelectObject( memdc, hOldBitmap );

         ::DeleteDC( memdc );
 
         ::SetTextColor(GetHdc(), old_textground);
         ::DeleteDC( memdc );
 
         ::SetTextColor(GetHdc(), old_textground);


@@ -945,7 +1021,7 @@ void wxDC::DoDrawText(const wxString& text, wxCoord x, wxCoord y)
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif

-    
+

     DrawAnyText(text, x, y);
 
     // update the bounding box
     DrawAnyText(text, x, y);
 
     // update the bounding box


@@ -961,7 +1037,7 @@ void wxDC::DrawAnyText(const wxString& text, wxCoord x, wxCoord y)
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif

-    
+

     // prepare for drawing the text
     if ( m_textForegroundColour.Ok() )
         SetTextColor(GetHdc(), m_textForegroundColour.GetPixel());
     // prepare for drawing the text
     if ( m_textForegroundColour.Ok() )
         SetTextColor(GetHdc(), m_textForegroundColour.GetPixel());


@@ -997,7 +1073,7 @@ void wxDC::DoDrawRotatedText(const wxString& text,
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif

-    
+

     // we test that we have some font because otherwise we should still use the
     // "else" part below to avoid that DrawRotatedText(angle = 180) and
     // DrawRotatedText(angle = 0) use different fonts (we can't use the default
     // we test that we have some font because otherwise we should still use the
     // "else" part below to avoid that DrawRotatedText(angle = 180) and
     // DrawRotatedText(angle = 0) use different fonts (we can't use the default


@@ -1009,9 +1085,10 @@ void wxDC::DoDrawRotatedText(const wxString& text,
 #ifndef __WXMICROWIN__
     else
     {
 #ifndef __WXMICROWIN__
     else
     {

-        // NB: don't take DEFAULT_GUI_FONT because it's not TrueType and so
-        //     can't have non zero orientation/escapement
-        wxFont font = m_font.Ok() ? m_font : *wxNORMAL_FONT;
+        // NB: don't take DEFAULT_GUI_FONT (a.k.a. wxSYS_DEFAULT_GUI_FONT)
+        //     because it's not TrueType and so can't have non zero
+        //     orientation/escapement under Win9x
+        wxFont font = m_font.Ok() ? m_font : *wxSWISS_FONT;

         HFONT hfont = (HFONT)font.GetResourceHandle();
         LOGFONT lf;
         if ( ::GetObject(hfont, sizeof(lf), &lf) == 0 )
         HFONT hfont = (HFONT)font.GetResourceHandle();
         LOGFONT lf;
         if ( ::GetObject(hfont, sizeof(lf), &lf) == 0 )


@@ -1064,51 +1141,71 @@ void wxDC::DoDrawRotatedText(const wxString& text,
 // set GDI objects
 // ---------------------------------------------------------------------------
 
 // set GDI objects
 // ---------------------------------------------------------------------------
 

-void wxDC::SetPalette(const wxPalette& palette)
+#if wxUSE_PALETTE
+
+void wxDC::DoSelectPalette(bool realize)

 {
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif
 {
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif

-    
+

     // Set the old object temporarily, in case the assignment deletes an object
     // that's not yet selected out.
     if (m_oldPalette)
     {
     // Set the old object temporarily, in case the assignment deletes an object
     // that's not yet selected out.
     if (m_oldPalette)
     {

-        ::SelectPalette(GetHdc(), (HPALETTE) m_oldPalette, TRUE);
+        ::SelectPalette(GetHdc(), (HPALETTE) m_oldPalette, FALSE);

         m_oldPalette = 0;
     }
 
         m_oldPalette = 0;
     }
 

-    m_palette = palette;
-
-    if (!m_palette.Ok())
+    if ( m_palette.Ok() )

     {
     {

-        // Setting a NULL colourmap is a way of restoring
-        // the original colourmap
-        if (m_oldPalette)
-        {
-            ::SelectPalette(GetHdc(), (HPALETTE) m_oldPalette, TRUE);
-            m_oldPalette = 0;
-        }
+        HPALETTE oldPal = ::SelectPalette(GetHdc(),
+                                          GetHpaletteOf(m_palette),
+                                          FALSE);
+        if (!m_oldPalette)
+            m_oldPalette = (WXHPALETTE) oldPal;

 
 

-        return;
+        if (realize)
+            ::RealizePalette(GetHdc());

     }
     }

+}

 
 

-    if (m_palette.Ok() && m_palette.GetHPALETTE())
+void wxDC::SetPalette(const wxPalette& palette)
+{
+    if ( palette.Ok() )

     {
     {

-        HPALETTE oldPal = ::SelectPalette(GetHdc(), (HPALETTE) m_palette.GetHPALETTE(), TRUE);
-        if (!m_oldPalette)
-            m_oldPalette = (WXHPALETTE) oldPal;
+        m_palette = palette;
+        DoSelectPalette(TRUE);
+    }
+}

 
 

-        ::RealizePalette(GetHdc());
+void wxDC::InitializePalette()
+{
+    if ( wxDisplayDepth() <= 8 )
+    {
+        // look for any window or parent that has a custom palette. If any has
+        // one then we need to use it in drawing operations
+        wxWindow *win = m_canvas->GetAncestorWithCustomPalette();
+
+        m_hasCustomPalette = win && win->HasCustomPalette();
+        if ( m_hasCustomPalette )
+        {
+            m_palette = win->GetPalette();
+
+            // turn on MSW translation for this palette
+            DoSelectPalette();
+        }

     }
 }
 
     }
 }
 

+#endif // wxUSE_PALETTE
+

 void wxDC::SetFont(const wxFont& the_font)
 {
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif
 void wxDC::SetFont(const wxFont& the_font)
 {
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif

-    
+

     // Set the old object temporarily, in case the assignment deletes an object
     // that's not yet selected out.
     if (m_oldFont)
     // Set the old object temporarily, in case the assignment deletes an object
     // that's not yet selected out.
     if (m_oldFont)


@@ -1143,7 +1240,7 @@ void wxDC::SetPen(const wxPen& pen)
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif

-    
+

     // Set the old object temporarily, in case the assignment deletes an object
     // that's not yet selected out.
     if (m_oldPen)
     // Set the old object temporarily, in case the assignment deletes an object
     // that's not yet selected out.
     if (m_oldPen)


@@ -1177,7 +1274,7 @@ void wxDC::SetBrush(const wxBrush& brush)
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif

-    
+

     // Set the old object temporarily, in case the assignment deletes an object
     // that's not yet selected out.
     if (m_oldBrush)
     // Set the old object temporarily, in case the assignment deletes an object
     // that's not yet selected out.
     if (m_oldBrush)


@@ -1202,12 +1299,12 @@ void wxDC::SetBrush(const wxBrush& brush)
         if ( stipple && stipple->Ok() )
         {
 #ifdef __WIN32__
         if ( stipple && stipple->Ok() )
         {
 #ifdef __WIN32__

-               ::SetBrushOrgEx(GetHdc(),
+            ::SetBrushOrgEx(GetHdc(),

                             m_deviceOriginX % stipple->GetWidth(),
                             m_deviceOriginY % stipple->GetHeight(),
                             NULL);  // don't need previous brush origin
 #else
                             m_deviceOriginX % stipple->GetWidth(),
                             m_deviceOriginY % stipple->GetHeight(),
                             NULL);  // don't need previous brush origin
 #else

-               ::SetBrushOrg(GetHdc(),
+            ::SetBrushOrg(GetHdc(),

                             m_deviceOriginX % stipple->GetWidth(),
                             m_deviceOriginY % stipple->GetHeight());
 #endif
                             m_deviceOriginX % stipple->GetWidth(),
                             m_deviceOriginY % stipple->GetHeight());
 #endif


@@ -1228,7 +1325,7 @@ void wxDC::SetBackground(const wxBrush& brush)
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif

-    
+

     m_backgroundBrush = brush;
 
     if (!m_backgroundBrush.Ok())
     m_backgroundBrush = brush;
 
     if (!m_backgroundBrush.Ok())


@@ -1273,19 +1370,11 @@ void wxDC::SetBackgroundMode(int mode)
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif

-    
+

     m_backgroundMode = mode;
 
     // SetBackgroundColour now only refers to text background
     // and m_backgroundMode is used there
     m_backgroundMode = mode;
 
     // SetBackgroundColour now only refers to text background
     // and m_backgroundMode is used there

-
-/*
-    if (m_backgroundMode == wxTRANSPARENT)
-        ::SetBkMode(GetHdc(), TRANSPARENT);
-    else
-        ::SetBkMode(GetHdc(), OPAQUE);
-       Last change:  AC   29 Jan 101    8:54 pm
-*/

 }
 
 void wxDC::SetLogicalFunction(int function)
 }
 
 void wxDC::SetLogicalFunction(int function)


@@ -1293,7 +1382,7 @@ void wxDC::SetLogicalFunction(int function)
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif

-    
+

     m_logicalFunction = function;
 
     SetRop(m_hDC);
     m_logicalFunction = function;
 
     SetRop(m_hDC);


@@ -1360,12 +1449,12 @@ wxCoord wxDC::GetCharHeight() const
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return 0;
 #endif
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return 0;
 #endif

-    
+

     TEXTMETRIC lpTextMetric;
 
     GetTextMetrics(GetHdc(), &lpTextMetric);
 
     TEXTMETRIC lpTextMetric;
 
     GetTextMetrics(GetHdc(), &lpTextMetric);
 

-    return YDEV2LOGREL(lpTextMetric.tmHeight);
+    return lpTextMetric.tmHeight;

 }
 
 wxCoord wxDC::GetCharWidth() const
 }
 
 wxCoord wxDC::GetCharWidth() const


@@ -1373,12 +1462,12 @@ wxCoord wxDC::GetCharWidth() const
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return 0;
 #endif
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return 0;
 #endif

-    
+

     TEXTMETRIC lpTextMetric;
 
     GetTextMetrics(GetHdc(), &lpTextMetric);
 
     TEXTMETRIC lpTextMetric;
 
     GetTextMetrics(GetHdc(), &lpTextMetric);
 

-    return XDEV2LOGREL(lpTextMetric.tmAveCharWidth);
+    return lpTextMetric.tmAveCharWidth;

 }
 
 void wxDC::DoGetTextExtent(const wxString& string, wxCoord *x, wxCoord *y,
 }
 
 void wxDC::DoGetTextExtent(const wxString& string, wxCoord *x, wxCoord *y,


@@ -1388,14 +1477,14 @@ void wxDC::DoGetTextExtent(const wxString& string, wxCoord *x, wxCoord *y,
 #ifdef __WXMICROWIN__
     if (!GetHDC())
     {
 #ifdef __WXMICROWIN__
     if (!GetHDC())
     {

-       if (x) *x = 0;
-       if (y) *y = 0;
-       if (descent) *descent = 0;
-       if (externalLeading) *externalLeading = 0;
-       return;
+        if (x) *x = 0;
+        if (y) *y = 0;
+        if (descent) *descent = 0;
+        if (externalLeading) *externalLeading = 0;
+        return;

     }
     }

-#endif
-    
+#endif // __WXMICROWIN__
+

     HFONT hfontOld;
     if ( font )
     {
     HFONT hfontOld;
     if ( font )
     {


@@ -1414,10 +1503,14 @@ void wxDC::DoGetTextExtent(const wxString& string, wxCoord *x, wxCoord *y,
     GetTextExtentPoint(GetHdc(), string, string.length(), &sizeRect);
     GetTextMetrics(GetHdc(), &tm);
 
     GetTextExtentPoint(GetHdc(), string, string.length(), &sizeRect);
     GetTextMetrics(GetHdc(), &tm);
 

-    if (x) *x = XDEV2LOGREL(sizeRect.cx);
-    if (y) *y = YDEV2LOGREL(sizeRect.cy);
-    if (descent) *descent = tm.tmDescent;
-    if (externalLeading) *externalLeading = tm.tmExternalLeading;
+    if (x)
+        *x = sizeRect.cx;
+    if (y)
+        *y = sizeRect.cy;
+    if (descent)
+        *descent = tm.tmDescent;
+    if (externalLeading)
+        *externalLeading = tm.tmExternalLeading;

 
     if ( hfontOld )
     {
 
     if ( hfontOld )
     {


@@ -1430,71 +1523,70 @@ void wxDC::SetMapMode(int mode)
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif

-    
-    m_mappingMode = mode;
-
-    int pixel_width = 0;
-    int pixel_height = 0;
-    int mm_width = 0;
-    int mm_height = 0;

 
 

-    pixel_width = GetDeviceCaps(GetHdc(), HORZRES);
-    pixel_height = GetDeviceCaps(GetHdc(), VERTRES);
-    mm_width = GetDeviceCaps(GetHdc(), HORZSIZE);
-    mm_height = GetDeviceCaps(GetHdc(), VERTSIZE);
+    m_mappingMode = mode;

 
 

-    if ((pixel_width == 0) || (pixel_height == 0) || (mm_width == 0) || (mm_height == 0))
+    if ( mode == wxMM_TEXT )

     {
     {

-        return;
+        m_logicalScaleX =
+        m_logicalScaleY = 1.0;

     }
     }

-
-    double mm2pixelsX = pixel_width/mm_width;
-    double mm2pixelsY = pixel_height/mm_height;
-
-    switch (mode)
+    else // need to do some calculations

     {
     {

-    case wxMM_TWIPS:
-        {
-            m_logicalScaleX = (twips2mm * mm2pixelsX);
-            m_logicalScaleY = (twips2mm * mm2pixelsY);
-            break;
-        }
-    case wxMM_POINTS:
-        {
-            m_logicalScaleX = (pt2mm * mm2pixelsX);
-            m_logicalScaleY = (pt2mm * mm2pixelsY);
-            break;
-        }
-    case wxMM_METRIC:
-        {
-            m_logicalScaleX = mm2pixelsX;
-            m_logicalScaleY = mm2pixelsY;
-            break;
-        }
-    case wxMM_LOMETRIC:
+        int pixel_width = ::GetDeviceCaps(GetHdc(), HORZRES),
+            pixel_height = ::GetDeviceCaps(GetHdc(), VERTRES),
+            mm_width = ::GetDeviceCaps(GetHdc(), HORZSIZE),
+            mm_height = ::GetDeviceCaps(GetHdc(), VERTSIZE);
+
+        if ( (mm_width == 0) || (mm_height == 0) )

         {
         {

-            m_logicalScaleX = (mm2pixelsX/10.0);
-            m_logicalScaleY = (mm2pixelsY/10.0);
-            break;
+            // we can't calculate mm2pixels[XY] then!
+            return;

         }
         }

-    default:
-    case wxMM_TEXT:
+
+        double mm2pixelsX = pixel_width / mm_width,
+               mm2pixelsY = pixel_height / mm_height;
+
+        switch (mode)

         {
         {

-            m_logicalScaleX = 1.0;
-            m_logicalScaleY = 1.0;
-            break;
+            case wxMM_TWIPS:
+                m_logicalScaleX = twips2mm * mm2pixelsX;
+                m_logicalScaleY = twips2mm * mm2pixelsY;
+                break;
+
+            case wxMM_POINTS:
+                m_logicalScaleX = pt2mm * mm2pixelsX;
+                m_logicalScaleY = pt2mm * mm2pixelsY;
+                break;
+
+            case wxMM_METRIC:
+                m_logicalScaleX = mm2pixelsX;
+                m_logicalScaleY = mm2pixelsY;
+                break;
+
+            case wxMM_LOMETRIC:
+                m_logicalScaleX = mm2pixelsX / 10.0;
+                m_logicalScaleY = mm2pixelsY / 10.0;
+                break;
+
+            default:
+                wxFAIL_MSG( _T("unknown mapping mode in SetMapMode") );

         }
     }
 
         }
     }
 

-    if (::GetMapMode(GetHdc()) != MM_ANISOTROPIC)
-        ::SetMapMode(GetHdc(), MM_ANISOTROPIC);
+    // VZ: it seems very wasteful to always use MM_ANISOTROPIC when in 99% of
+    //     cases we could do with MM_TEXT and in the remaining 0.9% with
+    //     MM_ISOTROPIC (TODO!)
+    ::SetMapMode(GetHdc(), MM_ANISOTROPIC);

 
 

-    SetViewportExtEx(GetHdc(), VIEWPORT_EXTENT, VIEWPORT_EXTENT, NULL);
-    m_windowExtX = (int)MS_XDEV2LOGREL(VIEWPORT_EXTENT);
-    m_windowExtY = (int)MS_YDEV2LOGREL(VIEWPORT_EXTENT);
-    ::SetWindowExtEx(GetHdc(), m_windowExtX, m_windowExtY, NULL);
-    ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
-    ::SetWindowOrgEx(GetHdc(), (int)m_logicalOriginX, (int)m_logicalOriginY, NULL);
+    int width = DeviceToLogicalXRel(VIEWPORT_EXTENT)*m_signX,
+        height = DeviceToLogicalYRel(VIEWPORT_EXTENT)*m_signY;
+
+    ::SetViewportExtEx(GetHdc(), VIEWPORT_EXTENT, VIEWPORT_EXTENT, NULL);
+    ::SetWindowExtEx(GetHdc(), width, height, NULL);
+
+    ::SetViewportOrgEx(GetHdc(), m_deviceOriginX, m_deviceOriginY, NULL);
+    ::SetWindowOrgEx(GetHdc(), m_logicalOriginX, m_logicalOriginY, NULL);

 }
 
 void wxDC::SetUserScale(double x, double y)
 }
 
 void wxDC::SetUserScale(double x, double y)


@@ -1502,7 +1594,10 @@ void wxDC::SetUserScale(double x, double y)
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif

-    
+
+    if ( x == m_userScaleX && y == m_userScaleY )
+        return;
+

     m_userScaleX = x;
     m_userScaleY = y;
 
     m_userScaleX = x;
     m_userScaleY = y;
 


@@ -1514,11 +1609,17 @@ void wxDC::SetAxisOrientation(bool xLeftRight, bool yBottomUp)
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif

-    
-    m_signX = xLeftRight ? 1 : -1;
-    m_signY = yBottomUp ? -1 : 1;

 
 

-    SetMapMode(m_mappingMode);
+    int signX = xLeftRight ? 1 : -1,
+        signY = yBottomUp ? -1 : 1;
+
+    if ( signX != m_signX || signY != m_signY )
+    {
+        m_signX = signX;
+        m_signY = signY;
+
+        SetMapMode(m_mappingMode);
+    }

 }
 
 void wxDC::SetSystemScale(double x, double y)
 }
 
 void wxDC::SetSystemScale(double x, double y)


@@ -1526,7 +1627,10 @@ void wxDC::SetSystemScale(double x, double y)
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif

-    
+
+    if ( x == m_scaleX && y == m_scaleY )
+        return;
+

     m_scaleX = x;
     m_scaleY = y;
 
     m_scaleX = x;
     m_scaleY = y;
 


@@ -1538,7 +1642,10 @@ void wxDC::SetLogicalOrigin(wxCoord x, wxCoord y)
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif

-    
+
+    if ( x == m_logicalOriginX && y == m_logicalOriginY )
+        return;
+

     m_logicalOriginX = x;
     m_logicalOriginY = y;
 
     m_logicalOriginX = x;
     m_logicalOriginY = y;
 


@@ -1550,7 +1657,10 @@ void wxDC::SetDeviceOrigin(wxCoord x, wxCoord y)
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif

-    
+
+    if ( x == m_deviceOriginX && y == m_deviceOriginY )
+        return;
+

     m_deviceOriginX = x;
     m_deviceOriginY = y;
 
     m_deviceOriginX = x;
     m_deviceOriginY = y;
 


@@ -1563,46 +1673,46 @@ void wxDC::SetDeviceOrigin(wxCoord x, wxCoord y)
 
 wxCoord wxDCBase::DeviceToLogicalX(wxCoord x) const
 {
 
 wxCoord wxDCBase::DeviceToLogicalX(wxCoord x) const
 {

-    double xRel = x - m_deviceOriginX;
-    xRel /= m_logicalScaleX*m_userScaleX*m_signX*m_scaleX;
-    return (wxCoord)(xRel + m_logicalOriginX);
+    return DeviceToLogicalXRel(x - m_deviceOriginX)*m_signX + m_logicalOriginX;

 }
 
 wxCoord wxDCBase::DeviceToLogicalXRel(wxCoord x) const
 {
 }
 
 wxCoord wxDCBase::DeviceToLogicalXRel(wxCoord x) const
 {

-    return (wxCoord) ((x)/(m_logicalScaleX*m_userScaleX*m_signX*m_scaleX));
+    // axis orientation is not taken into account for conversion of a distance
+    return (wxCoord)(x / (m_logicalScaleX*m_userScaleX*m_scaleX));

 }
 
 wxCoord wxDCBase::DeviceToLogicalY(wxCoord y) const
 {
 }
 
 wxCoord wxDCBase::DeviceToLogicalY(wxCoord y) const
 {

-    double yRel = y - m_deviceOriginY;
-    yRel /= m_logicalScaleY*m_userScaleY*m_signY*m_scaleY;
-    return (wxCoord)(yRel + m_logicalOriginY);
+    return DeviceToLogicalYRel(y - m_deviceOriginY)*m_signY + m_logicalOriginY;

 }
 
 wxCoord wxDCBase::DeviceToLogicalYRel(wxCoord y) const
 {
 }
 
 wxCoord wxDCBase::DeviceToLogicalYRel(wxCoord y) const
 {

-    return (wxCoord) ((y)/(m_logicalScaleY*m_userScaleY*m_signY*m_scaleY));
+    // axis orientation is not taken into account for conversion of a distance
+    return (wxCoord)( y / (m_logicalScaleY*m_userScaleY*m_scaleY));

 }
 
 wxCoord wxDCBase::LogicalToDeviceX(wxCoord x) const
 {
 }
 
 wxCoord wxDCBase::LogicalToDeviceX(wxCoord x) const
 {

-    return (wxCoord) ((x - m_logicalOriginX)*m_logicalScaleX*m_userScaleX*m_signX*m_scaleX + m_deviceOriginX);
+    return LogicalToDeviceXRel(x - m_logicalOriginX)*m_signX + m_deviceOriginX;

 }
 
 wxCoord wxDCBase::LogicalToDeviceXRel(wxCoord x) const
 {
 }
 
 wxCoord wxDCBase::LogicalToDeviceXRel(wxCoord x) const
 {

-    return (wxCoord) (x*m_logicalScaleX*m_userScaleX*m_signX*m_scaleX);
+    // axis orientation is not taken into account for conversion of a distance
+    return (wxCoord) (x*m_logicalScaleX*m_userScaleX*m_scaleX);

 }
 
 wxCoord wxDCBase::LogicalToDeviceY(wxCoord y) const
 {
 }
 
 wxCoord wxDCBase::LogicalToDeviceY(wxCoord y) const
 {

-    return (wxCoord) ((y - m_logicalOriginY)*m_logicalScaleY*m_userScaleY*m_signY*m_scaleY + m_deviceOriginY);
+    return LogicalToDeviceYRel(y - m_logicalOriginY)*m_signY + m_deviceOriginY;

 }
 
 wxCoord wxDCBase::LogicalToDeviceYRel(wxCoord y) const
 {
 }
 
 wxCoord wxDCBase::LogicalToDeviceYRel(wxCoord y) const
 {

-    return (wxCoord) (y*m_logicalScaleY*m_userScaleY*m_signY*m_scaleY);
+    // axis orientation is not taken into account for conversion of a distance
+    return (wxCoord) (y*m_logicalScaleY*m_userScaleY*m_scaleY);

 }
 
 // ---------------------------------------------------------------------------
 }
 
 // ---------------------------------------------------------------------------


@@ -1618,7 +1728,7 @@ bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest,
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return FALSE;
 #endif
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return FALSE;
 #endif

-    
+

     wxMask *mask = NULL;
     if ( useMask )
     {
     wxMask *mask = NULL;
     if ( useMask )
     {


@@ -1721,9 +1831,9 @@ bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest,
             dc_mask = ::CreateCompatibleDC(GetHdcOf(*source));
             dc_buffer = ::CreateCompatibleDC(GetHdc());
             buffer_bmap = ::CreateCompatibleBitmap(GetHdc(), width, height);
             dc_mask = ::CreateCompatibleDC(GetHdcOf(*source));
             dc_buffer = ::CreateCompatibleDC(GetHdc());
             buffer_bmap = ::CreateCompatibleBitmap(GetHdc(), width, height);

-            ::SelectObject(dc_mask, (HBITMAP) mask->GetMaskBitmap());
-            ::SelectObject(dc_buffer, buffer_bmap);

 #endif // wxUSE_DC_CACHEING/!wxUSE_DC_CACHEING
 #endif // wxUSE_DC_CACHEING/!wxUSE_DC_CACHEING

+            HGDIOBJ hOldMaskBitmap = ::SelectObject(dc_mask, (HBITMAP) mask->GetMaskBitmap());
+            HGDIOBJ hOldBufferBitmap = ::SelectObject(dc_buffer, buffer_bmap);

 
             // copy dest to buffer
             if ( !::BitBlt(dc_buffer, 0, 0, (int)width, (int)height,
 
             // copy dest to buffer
             if ( !::BitBlt(dc_buffer, 0, 0, (int)width, (int)height,


@@ -1769,8 +1879,8 @@ bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest,
             }
 
             // tidy up temporary DCs and bitmap
             }
 
             // tidy up temporary DCs and bitmap

-            ::SelectObject(dc_mask, 0);
-            ::SelectObject(dc_buffer, 0);
+            ::SelectObject(dc_mask, hOldMaskBitmap);
+            ::SelectObject(dc_buffer, hOldBufferBitmap);

 
 #if !wxUSE_DC_CACHEING
             {
 
 #if !wxUSE_DC_CACHEING
             {


@@ -1802,7 +1912,7 @@ void wxDC::DoGetSize(int *w, int *h) const
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif

-    
+

     if ( w ) *w = ::GetDeviceCaps(GetHdc(), HORZRES);
     if ( h ) *h = ::GetDeviceCaps(GetHdc(), VERTRES);
 }
     if ( w ) *w = ::GetDeviceCaps(GetHdc(), HORZRES);
     if ( h ) *h = ::GetDeviceCaps(GetHdc(), VERTRES);
 }


@@ -1812,9 +1922,31 @@ void wxDC::DoGetSizeMM(int *w, int *h) const
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif

-    
-    if ( w ) *w = ::GetDeviceCaps(GetHdc(), HORZSIZE);
-    if ( h ) *h = ::GetDeviceCaps(GetHdc(), VERTSIZE);
+
+    // if we implement it in terms of DoGetSize() instead of directly using the
+    // results returned by GetDeviceCaps(HORZ/VERTSIZE) as was done before, it
+    // will also work for wxWindowDC and wxClientDC even though their size is
+    // not the same as the total size of the screen
+    int wPixels, hPixels;
+    DoGetSize(&wPixels, &hPixels);
+
+    if ( w )
+    {
+        int wTotal = ::GetDeviceCaps(GetHdc(), HORZRES);
+
+        wxCHECK_RET( wTotal, _T("0 width device?") );
+
+        *w = (wPixels * ::GetDeviceCaps(GetHdc(), HORZSIZE)) / wTotal;
+    }
+
+    if ( h )
+    {
+        int hTotal = ::GetDeviceCaps(GetHdc(), VERTRES);
+
+        wxCHECK_RET( hTotal, _T("0 height device?") );
+
+        *h = (hPixels * ::GetDeviceCaps(GetHdc(), VERTSIZE)) / hTotal;
+    }

 }
 
 wxSize wxDC::GetPPI() const
 }
 
 wxSize wxDC::GetPPI() const


@@ -1822,7 +1954,7 @@ wxSize wxDC::GetPPI() const
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return wxSize();
 #endif
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return wxSize();
 #endif

-    
+

     int x = ::GetDeviceCaps(GetHdc(), LOGPIXELSX);
     int y = ::GetDeviceCaps(GetHdc(), LOGPIXELSY);
 
     int x = ::GetDeviceCaps(GetHdc(), LOGPIXELSX);
     int y = ::GetDeviceCaps(GetHdc(), LOGPIXELSY);
 


@@ -1835,7 +1967,7 @@ void wxDC::SetLogicalScale(double x, double y)
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif

-    
+

     m_logicalScaleX = x;
     m_logicalScaleY = y;
 }
     m_logicalScaleX = x;
     m_logicalScaleY = y;
 }


@@ -1848,7 +1980,7 @@ void wxDC::DoGetTextExtent(const wxString& string, float *x, float *y,
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif
 #ifdef __WXMICROWIN__
     if (!GetHDC()) return;
 #endif

-    
+

     wxCoord x1, y1, descent1, externalLeading1;
     GetTextExtent(string, & x1, & y1, & descent1, & externalLeading1, theFont, use16bit);
     *x = x1; *y = y1;
     wxCoord x1, y1, descent1, externalLeading1;
     GetTextExtent(string, & x1, & y1, & descent1, & externalLeading1, theFont, use16bit);
     *x = x1; *y = y1;