X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/025f7d775c8366dec72258e0d9d83848203c4871..f79f06665c112b6eb081216d66589cad189fa166:/src/msw/dc.cpp

diff --git a/src/msw/dc.cpp b/src/msw/dc.cpp
index 73910fede1..d9f8c91288 100644
--- a/src/msw/dc.cpp
+++ b/src/msw/dc.cpp
@@ -34,6 +34,7 @@
     #include "wx/bitmap.h"
     #include "wx/dcmemory.h"
     #include "wx/log.h"
+    #include "wx/math.h"
     #include "wx/icon.h"
     #include "wx/dcprint.h"
     #include "wx/module.h"
@@ -43,15 +44,15 @@
 #include "wx/sysopt.h"
 #include "wx/dynlib.h"
 
-#ifdef wxHAVE_RAW_BITMAP
-#include "wx/rawbmp.h"
+#ifdef wxHAS_RAW_BITMAP
+    #include "wx/rawbmp.h"
 #endif
 
 #include <string.h>
 
-#ifndef __WIN32__
-    #include <print.h>
-#endif
+#include "wx/msw/private/dc.h"
+
+using namespace wxMSWImpl;
 
 #ifndef AC_SRC_ALPHA
     #define AC_SRC_ALPHA 1
@@ -82,7 +83,9 @@ IMPLEMENT_ABSTRACT_CLASS(wxMSWDCImpl, wxDCImpl)
 // constants
 // ---------------------------------------------------------------------------
 
-static const int VIEWPORT_EXTENT = 1000;
+// The device space in Win32 GDI measures 2^27*2^27 , so we use 2^27-1 as the
+// maximal possible view port extent.
+static const int VIEWPORT_EXTENT = 134217727;
 
 // ROPs which don't have standard names (see "Ternary Raster Operations" in the
 // MSDN docs for how this and other numbers in wxDC::Blit() are obtained)
@@ -133,7 +136,7 @@ static bool AlphaBlt(HDC hdcDst,
                      HDC hdcSrc,
                      const wxBitmap& bmp);
 
-#ifdef wxHAVE_RAW_BITMAP
+#ifdef wxHAS_RAW_BITMAP
 
 // our (limited) AlphaBlend() replacement for Windows versions not providing it
 static void
@@ -143,7 +146,7 @@ wxAlphaBlend(HDC hdcDst, int xDst, int yDst,
              int srcWidth, int srcHeight,
              const wxBitmap& bmpSrc);
 
-#endif // wxHAVE_RAW_BITMAP
+#endif // wxHAS_RAW_BITMAP
 
 // ----------------------------------------------------------------------------
 // private classes
@@ -153,45 +156,47 @@ wxAlphaBlend(HDC hdcDst, int xDst, int yDst,
 // colours in each wxDC method working with wxSTIPPLE_MASK_OPAQUE brushes,
 // encapsulate this in a small helper class
 
-// wxColourChanger: changes the text colours in the ctor if required and
+// wxBrushAttrsSetter: changes the text colours in the ctor if required and
 //                  restores them in the dtor
-class wxColourChanger
+class wxBrushAttrsSetter : private wxBkModeChanger,
+                           private wxTextColoursChanger
 {
 public:
-    wxColourChanger(wxMSWDCImpl& dc);
-   ~wxColourChanger();
+    wxBrushAttrsSetter(wxMSWDCImpl& dc);
 
 private:
-    wxMSWDCImpl& m_dc;
+    wxDECLARE_NO_COPY_CLASS(wxBrushAttrsSetter);
+};
 
-    COLORREF m_colFgOld, m_colBgOld;
+#ifdef __WXWINCE__
 
-    bool m_changed;
+#define SET_STRETCH_BLT_MODE(hdc)
 
-    DECLARE_NO_COPY_CLASS(wxColourChanger)
-};
+#else // !__WXWINCE__
 
-// this class saves the old stretch blit mode during its life time
+// this class sets the stretch blit mode to COLORONCOLOR during its lifetime
+//
+// don't use it directly, use SET_STRETCH_BLT_MODE() macro instead as it
+// expands to nothing under WinCE which doesn't have SetStretchBltMode()
 class StretchBltModeChanger
 {
 public:
-    StretchBltModeChanger(HDC hdc,
-                          int WXUNUSED_IN_WINCE(mode))
+    StretchBltModeChanger(HDC hdc)
         : m_hdc(hdc)
     {
-#ifndef __WXWINCE__
-        m_modeOld = ::SetStretchBltMode(m_hdc, mode);
+        m_modeOld = ::SetStretchBltMode(m_hdc, COLORONCOLOR);
         if ( !m_modeOld )
-            wxLogLastError(_T("SetStretchBltMode"));
-#endif
+        {
+            wxLogLastError(wxT("SetStretchBltMode"));
+        }
     }
 
     ~StretchBltModeChanger()
     {
-#ifndef __WXWINCE__
         if ( !::SetStretchBltMode(m_hdc, m_modeOld) )
-            wxLogLastError(_T("SetStretchBltMode"));
-#endif
+        {
+            wxLogLastError(wxT("SetStretchBltMode"));
+        }
     }
 
 private:
@@ -199,9 +204,14 @@ private:
 
     int m_modeOld;
 
-    DECLARE_NO_COPY_CLASS(StretchBltModeChanger)
+    wxDECLARE_NO_COPY_CLASS(StretchBltModeChanger);
 };
 
+#define SET_STRETCH_BLT_MODE(hdc) \
+    StretchBltModeChanger wxMAKE_UNIQUE_NAME(stretchModeChanger)(hdc)
+
+#endif // __WXWINCE__/!__WXWINCE__
+
 #if wxUSE_DYNLIB_CLASS
 
 // helper class to cache dynamically loaded libraries and not attempt reloading
@@ -248,7 +258,7 @@ private:
     const wxChar *m_dllName;
 };
 
-static wxOnceOnlyDLLLoader wxMSIMG32DLL(_T("msimg32"));
+static wxOnceOnlyDLLLoader wxMSIMG32DLL(wxT("msimg32"));
 
 // we must ensure that DLLs are unloaded before the static objects cleanup time
 // because we may hit the notorious DllMain() dead lock in this case if wx is
@@ -266,6 +276,98 @@ private:
 
 IMPLEMENT_DYNAMIC_CLASS(wxGDIDLLsCleanupModule, wxModule)
 
+namespace
+{
+
+#if wxUSE_DC_TRANSFORM_MATRIX
+
+// Class used to dynamically load world transform related API functions.
+class GdiWorldTransformFuncs
+{
+public:
+    static bool IsOk()
+    {
+        if ( !ms_worldTransformSymbolsLoaded )
+            LoadWorldTransformSymbols();
+
+        return ms_pfnSetGraphicsMode &&
+                ms_pfnSetWorldTransform &&
+                 ms_pfnGetWorldTransform &&
+                  ms_pfnModifyWorldTransform;
+    }
+
+    typedef int (WINAPI *SetGraphicsMode_t)(HDC, int);
+    static SetGraphicsMode_t SetGraphicsMode()
+    {
+        if ( !ms_worldTransformSymbolsLoaded )
+            LoadWorldTransformSymbols();
+
+        return ms_pfnSetGraphicsMode;
+    }
+
+    typedef BOOL (WINAPI *SetWorldTransform_t)(HDC, const XFORM *);
+    static SetWorldTransform_t SetWorldTransform()
+    {
+        if ( !ms_worldTransformSymbolsLoaded )
+            LoadWorldTransformSymbols();
+
+        return ms_pfnSetWorldTransform;
+    }
+
+    typedef BOOL (WINAPI *GetWorldTransform_t)(HDC, LPXFORM);
+    static GetWorldTransform_t GetWorldTransform()
+    {
+        if ( !ms_worldTransformSymbolsLoaded )
+            LoadWorldTransformSymbols();
+
+        return ms_pfnGetWorldTransform;
+    }
+
+    typedef BOOL (WINAPI *ModifyWorldTransform_t)(HDC, const XFORM *, DWORD);
+    static ModifyWorldTransform_t ModifyWorldTransform()
+    {
+        if ( !ms_worldTransformSymbolsLoaded )
+            LoadWorldTransformSymbols();
+
+        return ms_pfnModifyWorldTransform;
+    }
+
+private:
+    static void LoadWorldTransformSymbols()
+    {
+        wxDynamicLibrary dll(wxT("gdi32.dll"));
+
+        wxDL_INIT_FUNC(ms_pfn, SetGraphicsMode, dll);
+        wxDL_INIT_FUNC(ms_pfn, SetWorldTransform, dll);
+        wxDL_INIT_FUNC(ms_pfn, GetWorldTransform, dll);
+        wxDL_INIT_FUNC(ms_pfn, ModifyWorldTransform, dll);
+
+        ms_worldTransformSymbolsLoaded = true;
+    }
+
+    static SetGraphicsMode_t ms_pfnSetGraphicsMode;
+    static SetWorldTransform_t ms_pfnSetWorldTransform;
+    static GetWorldTransform_t ms_pfnGetWorldTransform;
+    static ModifyWorldTransform_t ms_pfnModifyWorldTransform;
+
+    static bool ms_worldTransformSymbolsLoaded;
+};
+
+GdiWorldTransformFuncs::SetGraphicsMode_t
+    GdiWorldTransformFuncs::ms_pfnSetGraphicsMode = NULL;
+GdiWorldTransformFuncs::SetWorldTransform_t
+    GdiWorldTransformFuncs::ms_pfnSetWorldTransform = NULL;
+GdiWorldTransformFuncs::GetWorldTransform_t
+    GdiWorldTransformFuncs::ms_pfnGetWorldTransform = NULL;
+GdiWorldTransformFuncs::ModifyWorldTransform_t
+    GdiWorldTransformFuncs::ms_pfnModifyWorldTransform = NULL;
+
+bool GdiWorldTransformFuncs::ms_worldTransformSymbolsLoaded = false;
+
+#endif // wxUSE_DC_TRANSFORM_MATRIX
+
+} // anonymous namespace
+
 #endif // wxUSE_DYNLIB_CLASS
 
 // ===========================================================================
@@ -273,57 +375,33 @@ IMPLEMENT_DYNAMIC_CLASS(wxGDIDLLsCleanupModule, wxModule)
 // ===========================================================================
 
 // ----------------------------------------------------------------------------
-// wxColourChanger
+// wxBrushAttrsSetter
 // ----------------------------------------------------------------------------
 
-wxColourChanger::wxColourChanger(wxMSWDCImpl& dc) : m_dc(dc)
+wxBrushAttrsSetter::wxBrushAttrsSetter(wxMSWDCImpl& dc)
+                  : wxBkModeChanger(GetHdcOf(dc)),
+                    wxTextColoursChanger(GetHdcOf(dc))
 {
     const wxBrush& brush = dc.GetBrush();
-    if ( brush.IsOk() && brush.GetStyle() == wxSTIPPLE_MASK_OPAQUE )
+    if ( brush.IsOk() && brush.GetStyle() == wxBRUSHSTYLE_STIPPLE_MASK_OPAQUE )
     {
-        HDC hdc = GetHdcOf(dc);
-        m_colFgOld = ::GetTextColor(hdc);
-        m_colBgOld = ::GetBkColor(hdc);
-
         // note that Windows convention is opposite to wxWidgets one, this is
         // why text colour becomes the background one and vice versa
-        const wxColour& colFg = dc.GetTextForeground();
-        if ( colFg.IsOk() )
-        {
-            ::SetBkColor(hdc, colFg.GetPixel());
-        }
+        wxTextColoursChanger::Change(dc.GetTextBackground(),
+                                     dc.GetTextForeground());
 
-        const wxColour& colBg = dc.GetTextBackground();
-        if ( colBg.IsOk() )
-        {
-            ::SetTextColor(hdc, colBg.GetPixel());
-        }
-
-        SetBkMode(hdc,
-                  dc.GetBackgroundMode() == wxTRANSPARENT ? TRANSPARENT
-                                                          : OPAQUE);
-
-        // flag which telsl us to undo changes in the dtor
-        m_changed = true;
-    }
-    else
-    {
-        // nothing done, nothing to undo
-        m_changed = false;
+        wxBkModeChanger::Change(dc.GetBackgroundMode());
     }
 }
 
-wxColourChanger::~wxColourChanger()
-{
-    if ( m_changed )
-    {
-        // restore the colours we changed
-        HDC hdc = GetHdcOf(m_dc);
+// ----------------------------------------------------------------------------
+// wxDC MSW-specific methods
+// ----------------------------------------------------------------------------
 
-        ::SetBkMode(hdc, TRANSPARENT);
-        ::SetTextColor(hdc, m_colFgOld);
-        ::SetBkColor(hdc, m_colBgOld);
-    }
+WXHDC wxDC::GetHDC() const
+{
+    wxMSWDCImpl * const impl = wxDynamicCast(GetImpl(), wxMSWDCImpl);
+    return impl ? impl->GetHDC() : 0;
 }
 
 // ---------------------------------------------------------------------------
@@ -374,12 +452,10 @@ void wxMSWDCImpl::SelectOldObjects(WXHDC dc)
         if (m_oldBitmap)
         {
             ::SelectObject((HDC) dc, (HBITMAP) m_oldBitmap);
-#ifdef __WXDEBUG__
             if (m_selectedBitmap.IsOk())
             {
                 m_selectedBitmap.SetSelectedInto(NULL);
             }
-#endif
         }
         m_oldBitmap = 0;
         if (m_oldPen)
@@ -452,7 +528,7 @@ wxMSWDCImpl::DoGetClippingBox(wxCoord *x, wxCoord *y, wxCoord *w, wxCoord *h) co
     wxDCImpl::DoGetClippingBox(x, y, w, h);
 }
 
-// common part of DoSetClippingRegion() and DoSetClippingRegionAsRegion()
+// common part of DoSetClippingRegion() and DoSetDeviceClippingRegion()
 void wxMSWDCImpl::SetClippingHrgn(WXHRGN hrgn)
 {
     wxCHECK_RET( hrgn, wxT("invalid clipping region") );
@@ -487,7 +563,7 @@ void wxMSWDCImpl::SetClippingHrgn(WXHRGN hrgn)
 #else // !WinCE
     if ( ::ExtSelectClipRgn(GetHdc(), (HRGN)hrgn, RGN_AND) == ERROR )
     {
-        wxLogLastError(_T("ExtSelectClipRgn"));
+        wxLogLastError(wxT("ExtSelectClipRgn"));
 
         return;
     }
@@ -510,7 +586,7 @@ void wxMSWDCImpl::DoSetClippingRegion(wxCoord x, wxCoord y, wxCoord w, wxCoord h
                                 LogicalToDeviceY(y + h));
     if ( !hrgn )
     {
-        wxLogLastError(_T("CreateRectRgn"));
+        wxLogLastError(wxT("CreateRectRgn"));
     }
     else
     {
@@ -520,7 +596,7 @@ void wxMSWDCImpl::DoSetClippingRegion(wxCoord x, wxCoord y, wxCoord w, wxCoord h
     }
 }
 
-void wxMSWDCImpl::DoSetClippingRegionAsRegion(const wxRegion& region)
+void wxMSWDCImpl::DoSetDeviceClippingRegion(const wxRegion& region)
 {
     SetClippingHrgn(region.GetHRGN());
 }
@@ -622,7 +698,7 @@ void wxMSWDCImpl::Clear()
 bool wxMSWDCImpl::DoFloodFill(wxCoord WXUNUSED_IN_WINCE(x),
                        wxCoord WXUNUSED_IN_WINCE(y),
                        const wxColour& WXUNUSED_IN_WINCE(col),
-                       int WXUNUSED_IN_WINCE(style))
+                       wxFloodFillStyle WXUNUSED_IN_WINCE(style))
 {
 #ifdef __WXWINCE__
     return false;
@@ -660,7 +736,7 @@ bool wxMSWDCImpl::DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const
 {
     WXMICROWIN_CHECK_HDC_RET(false)
 
-    wxCHECK_MSG( col, false, _T("NULL colour parameter in wxMSWDCImpl::GetPixel") );
+    wxCHECK_MSG( col, false, wxT("NULL colour parameter in wxMSWDCImpl::GetPixel") );
 
     // get the color of the pixel
     COLORREF pixelcolor = ::GetPixel(GetHdc(), XLOG2DEV(x), YLOG2DEV(y));
@@ -702,23 +778,23 @@ void wxMSWDCImpl::DoDrawArc(wxCoord x1, wxCoord y1,
                      wxCoord x2, wxCoord y2,
                      wxCoord xc, wxCoord yc)
 {
+    double dx = xc - x1;
+    double dy = yc - y1;
+    wxCoord r = (wxCoord)sqrt(dx*dx + dy*dy);
+
+
 #ifdef __WXWINCE__
     // Slower emulation since WinCE doesn't support Pie and Arc
-    double r = sqrt( (x1-xc)*(x1-xc) + (y1-yc)*(y1-yc) );
     double sa = acos((x1-xc)/r)/M_PI*180; // between 0 and 180
-    if( y1>yc ) sa = -sa; // below center
+    if( y1>yc )
+        sa = -sa; // below center
     double ea = atan2(yc-y2, x2-xc)/M_PI*180;
     DoDrawEllipticArcRot( xc-r, yc-r, 2*r, 2*r, sa, ea );
 #else
 
     WXMICROWIN_CHECK_HDC
 
-    wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
-
-    double dx = xc - x1;
-    double dy = yc - y1;
-    double radius = (double)sqrt(dx*dx+dy*dy);
-    wxCoord r = (wxCoord)radius;
+    wxBrushAttrsSetter cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
 
     // treat the special case of full circle separately
     if ( x1 == x2 && y1 == y2 )
@@ -733,14 +809,16 @@ void wxMSWDCImpl::DoDrawArc(wxCoord x1, wxCoord y1,
     wxCoord yy2 = YLOG2DEV(y2);
     wxCoord xxc = XLOG2DEV(xc);
     wxCoord yyc = YLOG2DEV(yc);
-    wxCoord ray = (wxCoord) sqrt(double((xxc-xx1)*(xxc-xx1)+(yyc-yy1)*(yyc-yy1)));
+    dx = xxc - xx1;
+    dy = yyc - yy1;
+    wxCoord ray = (wxCoord)sqrt(dx*dx + dy*dy);
 
     wxCoord xxx1 = (wxCoord) (xxc-ray);
     wxCoord yyy1 = (wxCoord) (yyc-ray);
     wxCoord xxx2 = (wxCoord) (xxc+ray);
     wxCoord yyy2 = (wxCoord) (yyc+ray);
 
-    if ( m_brush.IsOk() && m_brush.GetStyle() != wxTRANSPARENT )
+    if ( m_brush.IsNonTransparent() )
     {
         // Have to add 1 to bottom-right corner of rectangle
         // to make semi-circles look right (crooked line otherwise).
@@ -776,7 +854,7 @@ void wxMSWDCImpl::DoDrawCheckMark(wxCoord x1, wxCoord y1,
     rect.bottom = y2;
 
 #ifdef __WXWINCE__
-    DrawFrameControl(GetHdc(), &rect, DFC_BUTTON, DFCS_BUTTONCHECK);
+    DrawFrameControl(GetHdc(), &rect, DFC_BUTTON, DFCS_BUTTONCHECK | DFCS_CHECKED);
 #else
     DrawFrameControl(GetHdc(), &rect, DFC_MENU, DFCS_MENUCHECK);
 #endif
@@ -805,11 +883,11 @@ void wxMSWDCImpl::DoDrawPolygon(int n,
                          wxPoint points[],
                          wxCoord xoffset,
                          wxCoord yoffset,
-                         int WXUNUSED_IN_WINCE(fillStyle))
+                         wxPolygonFillMode WXUNUSED_IN_WINCE(fillStyle))
 {
     WXMICROWIN_CHECK_HDC
 
-    wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
+    wxBrushAttrsSetter cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
 
     // Do things less efficiently if we have offsets
     if (xoffset != 0 || yoffset != 0)
@@ -854,14 +932,14 @@ wxMSWDCImpl::DoDrawPolyPolygon(int n,
                         wxPoint points[],
                         wxCoord xoffset,
                         wxCoord yoffset,
-                        int fillStyle)
+                        wxPolygonFillMode fillStyle)
 {
 #ifdef __WXWINCE__
     wxDCImpl::DoDrawPolyPolygon(n, count, points, xoffset, yoffset, fillStyle);
 #else
     WXMICROWIN_CHECK_HDC
 
-    wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
+    wxBrushAttrsSetter cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
     int i, cnt;
     for (i = cnt = 0; i < n; i++)
         cnt += count[i];
@@ -936,7 +1014,7 @@ void wxMSWDCImpl::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord h
 {
     WXMICROWIN_CHECK_HDC
 
-    wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
+    wxBrushAttrsSetter cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
 
     wxCoord x2 = x + width;
     wxCoord y2 = y + height;
@@ -948,7 +1026,7 @@ void wxMSWDCImpl::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord h
     // (i.e. drawn with a transparent pen) one pixel smaller in both directions
     // and we want them to have the same size regardless of which pen is used
 #ifndef __WXWINCE__
-    if ( m_pen.GetStyle() == wxTRANSPARENT )
+    if ( m_pen.IsTransparent() )
     {
         x2dev++;
         y2dev++;
@@ -965,7 +1043,7 @@ void wxMSWDCImpl::DoDrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wx
 {
     WXMICROWIN_CHECK_HDC
 
-    wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
+    wxBrushAttrsSetter cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
 
     // Now, a negative radius value is interpreted to mean
     // 'the proportion of the smallest X or Y dimension'
@@ -982,7 +1060,7 @@ void wxMSWDCImpl::DoDrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wx
     // Windows draws the filled rectangles without outline (i.e. drawn with a
     // transparent pen) one pixel smaller in both directions and we want them
     // to have the same size regardless of which pen is used - adjust
-    if ( m_pen.GetStyle() == wxTRANSPARENT )
+    if ( m_pen.IsTransparent() )
     {
         x2++;
         y2++;
@@ -999,24 +1077,25 @@ void wxMSWDCImpl::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord hei
 {
     WXMICROWIN_CHECK_HDC
 
-    wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
+    wxBrushAttrsSetter cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
 
-    wxCoord x2 = (x+width);
-    wxCoord y2 = (y+height);
+    // +1 below makes the ellipse more similar to other platforms.
+    // In particular, DoDrawEllipse(x,y,1,1) should draw one point.
+    wxCoord x2 = x + width + 1;
+    wxCoord y2 = y + height + 1;
 
-    (void)Ellipse(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2));
+    // Problem: Windows GDI Ellipse() with x2-x == y2-y == 3 and transparent
+    // pen doesn't draw anything. Should we provide a workaround?
+
+    ::Ellipse(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2));
 
     CalcBoundingBox(x, y);
     CalcBoundingBox(x2, y2);
 }
 
-#if wxUSE_SPLINES
+#if wxUSE_SPLINES && !defined(__WXWINCE__)
 void wxMSWDCImpl::DoDrawSpline(const wxPointList *points)
 {
-#ifdef  __WXWINCE__
-    // WinCE does not support ::PolyBezier so use generic version
-    wxDCImpl::DoDrawSpline(points);
-#else
     // quadratic b-spline to cubic bezier spline conversion
     //
     // quadratic spline with control points P0,P1,P2
@@ -1064,11 +1143,11 @@ void wxMSWDCImpl::DoDrawSpline(const wxPointList *points)
     lppt[ bezier_pos ] = lppt[ bezier_pos-1 ];
     bezier_pos++;
 
-#if !wxUSE_STL
+#if !wxUSE_STD_CONTAINERS
     while ((node = node->GetNext()) != NULL)
 #else
     while ((node = node->GetNext()))
-#endif // !wxUSE_STL
+#endif // !wxUSE_STD_CONTAINERS
     {
         p = (wxPoint *)node->GetData();
         x1 = x2;
@@ -1105,9 +1184,8 @@ void wxMSWDCImpl::DoDrawSpline(const wxPointList *points)
     ::PolyBezier( GetHdc(), lppt, bezier_pos );
 
     free(lppt);
-#endif
 }
-#endif
+#endif // wxUSE_SPLINES
 
 // Chris Breeze 20/5/98: first implementation of DrawEllipticArc on Windows
 void wxMSWDCImpl::DoDrawEllipticArc(wxCoord x,wxCoord y,wxCoord w,wxCoord h,double sa,double ea)
@@ -1118,7 +1196,7 @@ void wxMSWDCImpl::DoDrawEllipticArc(wxCoord x,wxCoord y,wxCoord w,wxCoord h,doub
 
     WXMICROWIN_CHECK_HDC
 
-    wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
+    wxBrushAttrsSetter cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
 
     wxCoord x2 = x + w;
     wxCoord y2 = y + h;
@@ -1191,7 +1269,7 @@ void wxMSWDCImpl::DoDrawBitmap( const wxBitmap &bmp, wxCoord x, wxCoord y, bool
 {
     WXMICROWIN_CHECK_HDC
 
-    wxCHECK_RET( bmp.IsOk(), _T("invalid bitmap in wxMSWDCImpl::DrawBitmap") );
+    wxCHECK_RET( bmp.IsOk(), wxT("invalid bitmap in wxMSWDCImpl::DrawBitmap") );
 
     int width = bmp.GetWidth(),
         height = bmp.GetHeight();
@@ -1211,6 +1289,8 @@ void wxMSWDCImpl::DoDrawBitmap( const wxBitmap &bmp, wxCoord x, wxCoord y, bool
             return;
     }
 
+    SET_STRETCH_BLT_MODE(GetHdc());
+
     if ( useMask )
     {
         wxMask *mask = bmp.GetMask();
@@ -1229,13 +1309,20 @@ void wxMSWDCImpl::DoDrawBitmap( const wxBitmap &bmp, wxCoord x, wxCoord y, bool
 #ifdef __WIN32__
         // use MaskBlt() with ROP which doesn't do anything to dst in the mask
         // points
+        bool ok = false;
+
+#if wxUSE_SYSTEM_OPTIONS
         // On some systems, MaskBlt succeeds yet is much much slower
         // than the wxWidgets fall-back implementation. So we need
         // to be able to switch this on and off at runtime.
-        bool ok = false;
-#if wxUSE_SYSTEM_OPTIONS
-        if (wxSystemOptions::GetOptionInt(wxT("no-maskblt")) == 0)
-#endif
+        //
+        // NB: don't query the value of the option every time but do it only
+        //     once as otherwise it can have real (and bad) performance
+        //     implications (see #11172)
+        static bool
+            s_maskBltAllowed = wxSystemOptions::GetOptionInt("no-maskblt") == 0;
+        if ( s_maskBltAllowed )
+#endif // wxUSE_SYSTEM_OPTIONS
         {
             HDC cdc = GetHdc();
             HDC hdcMem = ::CreateCompatibleDC(GetHdc());
@@ -1285,16 +1372,7 @@ void wxMSWDCImpl::DoDrawBitmap( const wxBitmap &bmp, wxCoord x, wxCoord y, bool
 
         wxASSERT_MSG( hbitmap, wxT("bitmap is ok but HBITMAP is NULL?") );
 
-        COLORREF old_textground = ::GetTextColor(GetHdc());
-        COLORREF old_background = ::GetBkColor(GetHdc());
-        if (m_textForegroundColour.IsOk())
-        {
-            ::SetTextColor(GetHdc(), m_textForegroundColour.GetPixel() );
-        }
-        if (m_textBackgroundColour.IsOk())
-        {
-            ::SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
-        }
+        wxTextColoursChanger textCol(GetHdc(), *this);
 
 #if wxUSE_PALETTE
         wxPalette *pal = bmp.GetPalette();
@@ -1315,14 +1393,23 @@ void wxMSWDCImpl::DoDrawBitmap( const wxBitmap &bmp, wxCoord x, wxCoord y, bool
 
         ::SelectObject( memdc, hOldBitmap );
         ::DeleteDC( memdc );
-
-        ::SetTextColor(GetHdc(), old_textground);
-        ::SetBkColor(GetHdc(), old_background);
     }
 }
 
 void wxMSWDCImpl::DoDrawText(const wxString& text, wxCoord x, wxCoord y)
 {
+    // For compatibility with other ports (notably wxGTK) and because it's
+    // genuinely useful, we allow passing multiline strings to DrawText().
+    // However there is no native MSW function to draw them directly so we
+    // instead reuse the generic DrawLabel() method to render them. Of course,
+    // DrawLabel() itself will call back to us but with single line strings
+    // only so there won't be any infinite recursion here.
+    if ( text.find('\n') != wxString::npos )
+    {
+        GetOwner()->DrawLabel(text, wxRect(x, y, 0, 0));
+        return;
+    }
+
     WXMICROWIN_CHECK_HDC
 
     DrawAnyText(text, x, y);
@@ -1340,39 +1427,15 @@ void wxMSWDCImpl::DrawAnyText(const wxString& text, wxCoord x, wxCoord y)
     WXMICROWIN_CHECK_HDC
 
     // prepare for drawing the text
-    if ( m_textForegroundColour.IsOk() )
-        SetTextColor(GetHdc(), m_textForegroundColour.GetPixel());
+    wxTextColoursChanger textCol(GetHdc(), *this);
 
-    DWORD old_background = 0;
-    if ( m_textBackgroundColour.IsOk() )
-    {
-        old_background = SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
-    }
+    wxBkModeChanger bkMode(GetHdc(), m_backgroundMode);
 
-    SetBkMode(GetHdc(), m_backgroundMode == wxTRANSPARENT ? TRANSPARENT
-                                                          : OPAQUE);
-
-#ifdef __WXWINCE__
     if ( ::ExtTextOut(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), 0, NULL,
                    text.c_str(), text.length(), NULL) == 0 )
     {
         wxLogLastError(wxT("TextOut"));
     }
-#else
-    if ( ::TextOut(GetHdc(), XLOG2DEV(x), YLOG2DEV(y),
-                   text.c_str(), text.length()) == 0 )
-    {
-        wxLogLastError(wxT("TextOut"));
-    }
-#endif
-
-    // restore the old parameters (text foreground colour may be left because
-    // it never is set to anything else, but background should remain
-    // transparent even if we just drew an opaque string)
-    if ( m_textBackgroundColour.IsOk() )
-        (void)SetBkColor(GetHdc(), old_background);
-
-    SetBkMode(GetHdc(), TRANSPARENT);
 }
 
 void wxMSWDCImpl::DoDrawRotatedText(const wxString& text,
@@ -1520,7 +1583,7 @@ void wxMSWDCImpl::SetFont(const wxFont& font)
         HGDIOBJ hfont = ::SelectObject(GetHdc(), GetHfontOf(font));
         if ( hfont == HGDI_ERROR )
         {
-            wxLogLastError(_T("SelectObject(font)"));
+            wxLogLastError(wxT("SelectObject(font)"));
         }
         else // selected ok
         {
@@ -1536,7 +1599,7 @@ void wxMSWDCImpl::SetFont(const wxFont& font)
         {
             if ( ::SelectObject(GetHdc(), (HPEN) m_oldFont) == HGDI_ERROR )
             {
-                wxLogLastError(_T("SelectObject(old font)"));
+                wxLogLastError(wxT("SelectObject(old font)"));
             }
 
             m_oldFont = 0;
@@ -1558,7 +1621,7 @@ void wxMSWDCImpl::SetPen(const wxPen& pen)
         HGDIOBJ hpen = ::SelectObject(GetHdc(), GetHpenOf(pen));
         if ( hpen == HGDI_ERROR )
         {
-            wxLogLastError(_T("SelectObject(pen)"));
+            wxLogLastError(wxT("SelectObject(pen)"));
         }
         else // selected ok
         {
@@ -1574,7 +1637,7 @@ void wxMSWDCImpl::SetPen(const wxPen& pen)
         {
             if ( ::SelectObject(GetHdc(), (HPEN) m_oldPen) == HGDI_ERROR )
             {
-                wxLogLastError(_T("SelectObject(old pen)"));
+                wxLogLastError(wxT("SelectObject(old pen)"));
             }
 
             m_oldPen = 0;
@@ -1594,26 +1657,33 @@ void wxMSWDCImpl::SetBrush(const wxBrush& brush)
     if ( brush.IsOk() )
     {
         // we must make sure the brush is aligned with the logical coordinates
-        // before selecting it
+        // before selecting it or using the same brush for the background of
+        // different windows would result in discontinuities
+        wxSize sizeBrushBitmap = wxDefaultSize;
         wxBitmap *stipple = brush.GetStipple();
         if ( stipple && stipple->IsOk() )
+            sizeBrushBitmap = stipple->GetSize();
+        else if ( brush.IsHatch() )
+            sizeBrushBitmap = wxSize(8, 8);
+
+        if ( sizeBrushBitmap.IsFullySpecified() )
         {
             if ( !::SetBrushOrgEx
                     (
                         GetHdc(),
-                        m_deviceOriginX % stipple->GetWidth(),
-                        m_deviceOriginY % stipple->GetHeight(),
+                        m_deviceOriginX % sizeBrushBitmap.x,
+                        m_deviceOriginY % sizeBrushBitmap.y,
                         NULL                    // [out] previous brush origin
                     ) )
             {
-                wxLogLastError(_T("SetBrushOrgEx()"));
+                wxLogLastError(wxT("SetBrushOrgEx()"));
             }
         }
 
         HGDIOBJ hbrush = ::SelectObject(GetHdc(), GetHbrushOf(brush));
         if ( hbrush == HGDI_ERROR )
         {
-            wxLogLastError(_T("SelectObject(brush)"));
+            wxLogLastError(wxT("SelectObject(brush)"));
         }
         else // selected ok
         {
@@ -1629,7 +1699,7 @@ void wxMSWDCImpl::SetBrush(const wxBrush& brush)
         {
             if ( ::SelectObject(GetHdc(), (HPEN) m_oldBrush) == HGDI_ERROR )
             {
-                wxLogLastError(_T("SelectObject(old brush)"));
+                wxLogLastError(wxT("SelectObject(old brush)"));
             }
 
             m_oldBrush = 0;
@@ -1661,7 +1731,7 @@ void wxMSWDCImpl::SetBackgroundMode(int mode)
     // and m_backgroundMode is used there
 }
 
-void wxMSWDCImpl::SetLogicalFunction(int function)
+void wxMSWDCImpl::SetLogicalFunction(wxRasterOperationMode function)
 {
     WXMICROWIN_CHECK_HDC
 
@@ -1695,10 +1765,9 @@ void wxMSWDCImpl::SetRop(WXHDC dc)
         case wxNAND:         rop = R2_NOTMASKPEN;    break;
         case wxOR:           rop = R2_MERGEPEN;      break;
         case wxSET:          rop = R2_WHITE;         break;
-
         default:
-           wxFAIL_MSG( wxT("unsupported logical function") );
-           return;
+            wxFAIL_MSG( wxS("unknown logical function") );
+            return;
     }
 
     SetROP2(GetHdc(), rop);
@@ -1748,6 +1817,31 @@ wxCoord wxMSWDCImpl::GetCharWidth() const
     return lpTextMetric.tmAveCharWidth;
 }
 
+void wxMSWDCImpl::DoGetFontMetrics(int *height,
+                                   int *ascent,
+                                   int *descent,
+                                   int *internalLeading,
+                                   int *externalLeading,
+                                   int *averageWidth) const
+{
+    TEXTMETRIC tm;
+
+    GetTextMetrics(GetHdc(), &tm);
+
+    if ( height )
+        *height = tm.tmHeight;
+    if ( ascent )
+        *ascent = tm.tmAscent;
+    if ( descent )
+        *descent = tm.tmDescent;
+    if ( internalLeading )
+        *internalLeading = tm.tmInternalLeading;
+    if ( externalLeading )
+        *externalLeading = tm.tmExternalLeading;
+    if ( averageWidth )
+        *averageWidth = tm.tmAveCharWidth;
+}
+
 void wxMSWDCImpl::DoGetTextExtent(const wxString& string, wxCoord *x, wxCoord *y,
                            wxCoord *descent, wxCoord *externalLeading,
                            const wxFont *font) const
@@ -1766,7 +1860,7 @@ void wxMSWDCImpl::DoGetTextExtent(const wxString& string, wxCoord *x, wxCoord *y
     HFONT hfontOld;
     if ( font )
     {
-        wxASSERT_MSG( font->IsOk(), _T("invalid font in wxMSWDCImpl::GetTextExtent") );
+        wxASSERT_MSG( font->IsOk(), wxT("invalid font in wxMSWDCImpl::GetTextExtent") );
 
         hfontOld = (HFONT)::SelectObject(GetHdc(), GetHfontOf(*font));
     }
@@ -1779,7 +1873,7 @@ void wxMSWDCImpl::DoGetTextExtent(const wxString& string, wxCoord *x, wxCoord *y
     const size_t len = string.length();
     if ( !::GetTextExtentPoint32(GetHdc(), string.wx_str(), len, &sizeRect) )
     {
-        wxLogLastError(_T("GetTextExtentPoint32()"));
+        wxLogLastError(wxT("GetTextExtentPoint32()"));
     }
 
 #if !defined(_WIN32_WCE) || (_WIN32_WCE >= 400)
@@ -1810,17 +1904,15 @@ void wxMSWDCImpl::DoGetTextExtent(const wxString& string, wxCoord *x, wxCoord *y
     }
 #endif // !defined(_WIN32_WCE) || (_WIN32_WCE >= 400)
 
-    TEXTMETRIC tm;
-    ::GetTextMetrics(GetHdc(), &tm);
-
     if (x)
         *x = sizeRect.cx;
     if (y)
         *y = sizeRect.cy;
-    if (descent)
-        *descent = tm.tmDescent;
-    if (externalLeading)
-        *externalLeading = tm.tmExternalLeading;
+
+    if ( descent || externalLeading )
+    {
+        DoGetFontMetrics(NULL, NULL, descent, NULL, externalLeading, NULL);
+    }
 
     if ( hfontOld )
     {
@@ -1870,26 +1962,58 @@ bool wxMSWDCImpl::DoGetPartialTextExtents(const wxString& text, wxArrayInt& widt
     return true;
 }
 
+namespace
+{
+
+void ApplyEffectiveScale(double scale, int sign, int *device, int *logical)
+{
+    // To reduce rounding errors as much as possible, we try to use the largest
+    // possible extent (2^27-1) for the device space but we must also avoid
+    // overflowing the int range i.e. ensure that logical extents are less than
+    // 2^31 in magnitude. So the minimal scale we can use is 1/16 as for
+    // anything smaller VIEWPORT_EXTENT/scale would overflow the int range.
+    static const double MIN_LOGICAL_SCALE = 1./16;
+
+    double physExtent = VIEWPORT_EXTENT;
+    if ( scale < MIN_LOGICAL_SCALE )
+    {
+        physExtent *= scale/MIN_LOGICAL_SCALE;
+        scale = MIN_LOGICAL_SCALE;
+    }
+
+    *device = wxRound(physExtent);
+    *logical = sign*wxRound(VIEWPORT_EXTENT/scale);
+}
+
+} // anonymous namespace
+
 void wxMSWDCImpl::RealizeScaleAndOrigin()
 {
-    // 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!)
+    // although it may seem wasteful to always use MM_ANISOTROPIC here instead
+    // of using MM_TEXT if there is no scaling, benchmarking doesn't detect any
+    // noticeable difference between these mapping modes
 #ifndef __WXWINCE__
     ::SetMapMode(GetHdc(), MM_ANISOTROPIC);
 
-    int width = DeviceToLogicalXRel(VIEWPORT_EXTENT)*m_signX,
-        height = DeviceToLogicalYRel(VIEWPORT_EXTENT)*m_signY;
+    // wxWidgets API assumes that the coordinate space is "infinite" (i.e. only
+    // limited by 2^32 range of the integer coordinates) but in MSW API we must
+    // actually specify the extents that we use so compute them here.
+
+    int devExtX, devExtY,   // Viewport, i.e. device space, extents.
+        logExtX, logExtY;   // Window, i.e. logical coordinate space, extents.
+
+    ApplyEffectiveScale(m_scaleX, m_signX, &devExtX, &logExtX);
+    ApplyEffectiveScale(m_scaleY, m_signY, &devExtY, &logExtY);
 
-    ::SetViewportExtEx(GetHdc(), VIEWPORT_EXTENT, VIEWPORT_EXTENT, NULL);
-    ::SetWindowExtEx(GetHdc(), width, height, NULL);
+    ::SetViewportExtEx(GetHdc(), devExtX, devExtY, NULL);
+    ::SetWindowExtEx(GetHdc(), logExtX, logExtY, NULL);
 
     ::SetViewportOrgEx(GetHdc(), m_deviceOriginX, m_deviceOriginY, NULL);
     ::SetWindowOrgEx(GetHdc(), m_logicalOriginX, m_logicalOriginY, NULL);
 #endif
 }
 
-void wxMSWDCImpl::SetMapMode(int mode)
+void wxMSWDCImpl::SetMapMode(wxMappingMode mode)
 {
     WXMICROWIN_CHECK_HDC
 
@@ -1939,7 +2063,7 @@ void wxMSWDCImpl::SetMapMode(int mode)
                 break;
 
             default:
-                wxFAIL_MSG( _T("unknown mapping mode in SetMapMode") );
+                wxFAIL_MSG( wxT("unknown mapping mode in SetMapMode") );
         }
     }
 
@@ -1985,9 +2109,15 @@ void wxMSWDCImpl::SetLogicalOrigin(wxCoord x, wxCoord y)
 
     wxDCImpl::SetLogicalOrigin( x, y );
 
-#ifndef __WXWINCE__
-    ::SetWindowOrgEx(GetHdc(), (int)m_logicalOriginX, (int)m_logicalOriginY, NULL);
-#endif
+    RealizeScaleAndOrigin();
+}
+
+// For use by wxWidgets only, unless custom units are required.
+void wxMSWDCImpl::SetLogicalScale(double x, double y)
+{
+    WXMICROWIN_CHECK_HDC
+
+    wxDCImpl::SetLogicalScale(x,y);
 }
 
 void wxMSWDCImpl::SetDeviceOrigin(wxCoord x, wxCoord y)
@@ -2002,6 +2132,87 @@ void wxMSWDCImpl::SetDeviceOrigin(wxCoord x, wxCoord y)
     ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
 }
 
+// ----------------------------------------------------------------------------
+// Transform matrix
+// ----------------------------------------------------------------------------
+
+#if wxUSE_DC_TRANSFORM_MATRIX
+
+bool wxMSWDCImpl::CanUseTransformMatrix() const
+{
+    return GdiWorldTransformFuncs::IsOk();
+}
+
+bool wxMSWDCImpl::SetTransformMatrix(const wxAffineMatrix2D &matrix)
+{
+    if ( !GdiWorldTransformFuncs::IsOk() )
+        return false;
+
+    if ( matrix.IsIdentity() )
+    {
+        ResetTransformMatrix();
+        return true;
+    }
+
+    if ( !GdiWorldTransformFuncs::SetGraphicsMode()(GetHdc(), GM_ADVANCED) )
+    {
+        wxLogLastError(wxT("SetGraphicsMode"));
+        return false;
+    }
+
+    wxMatrix2D mat;
+    wxPoint2DDouble tr;
+    matrix.Get(&mat, &tr);
+
+    XFORM xform;
+    xform.eM11 = mat.m_11;
+    xform.eM12 = mat.m_12;
+    xform.eM21 = mat.m_21;
+    xform.eM22 = mat.m_22;
+    xform.eDx = tr.m_x;
+    xform.eDy = tr.m_y;
+
+    if ( !GdiWorldTransformFuncs::SetWorldTransform()(GetHdc(), &xform) )
+    {
+        wxLogLastError(wxT("SetWorldTransform"));
+        return false;
+    }
+
+    return true;
+}
+
+wxAffineMatrix2D wxMSWDCImpl::GetTransformMatrix() const
+{
+    wxAffineMatrix2D transform;
+
+    if ( !GdiWorldTransformFuncs::IsOk() )
+        return transform;
+
+    XFORM xform;
+    if ( !GdiWorldTransformFuncs::GetWorldTransform()(GetHdc(), &xform) )
+    {
+        wxLogLastError(wxT("GetWorldTransform"));
+        return transform;
+    }
+
+    wxMatrix2D m(xform.eM11, xform.eM12, xform.eM21, xform.eM22);
+    wxPoint2DDouble p(xform.eDx, xform.eDy);
+    transform.Set(m, p);
+
+    return transform;
+}
+
+void wxMSWDCImpl::ResetTransformMatrix()
+{
+    if ( GdiWorldTransformFuncs::IsOk() )
+    {
+        GdiWorldTransformFuncs::ModifyWorldTransform()(GetHdc(), NULL, MWT_IDENTITY);
+        GdiWorldTransformFuncs::SetGraphicsMode()(GetHdc(), GM_COMPATIBLE);
+    }
+}
+
+#endif // wxUSE_DC_TRANSFORM_MATRIX
+
 // ---------------------------------------------------------------------------
 // bit blit
 // ---------------------------------------------------------------------------
@@ -2010,7 +2221,7 @@ bool wxMSWDCImpl::DoBlit(wxCoord dstX, wxCoord dstY,
                   wxCoord dstWidth, wxCoord dstHeight,
                   wxDC *source,
                   wxCoord srcX, wxCoord srcY,
-                  int rop, bool useMask,
+                  wxRasterOperationMode rop, bool useMask,
                   wxCoord srcMaskX, wxCoord srcMaskY)
 {
     return DoStretchBlit(dstX, dstY, dstWidth, dstHeight, source, srcX, srcY, dstWidth, dstHeight, rop, useMask, srcMaskX, srcMaskY);
@@ -2021,10 +2232,10 @@ bool wxMSWDCImpl::DoStretchBlit(wxCoord xdest, wxCoord ydest,
                          wxDC *source,
                          wxCoord xsrc, wxCoord ysrc,
                          wxCoord srcWidth, wxCoord srcHeight,
-                         int rop, bool useMask,
+                         wxRasterOperationMode rop, bool useMask,
                          wxCoord xsrcMask, wxCoord ysrcMask)
 {
-    wxCHECK_MSG( source, false, _T("wxMSWDCImpl::Blit(): NULL wxDC pointer") );
+    wxCHECK_MSG( source, false, wxT("wxMSWDCImpl::Blit(): NULL wxDC pointer") );
 
     WXMICROWIN_CHECK_HDC_RET(false)
 
@@ -2066,16 +2277,7 @@ bool wxMSWDCImpl::DoStretchBlit(wxCoord xdest, wxCoord ydest,
         xsrcMask = xsrc; ysrcMask = ysrc;
     }
 
-    COLORREF old_textground = ::GetTextColor(GetHdc());
-    COLORREF old_background = ::GetBkColor(GetHdc());
-    if (m_textForegroundColour.IsOk())
-    {
-        ::SetTextColor(GetHdc(), m_textForegroundColour.GetPixel() );
-    }
-    if (m_textBackgroundColour.IsOk())
-    {
-        ::SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
-    }
+    wxTextColoursChanger textCol(GetHdc(), *this);
 
     DWORD dwRop;
     switch (rop)
@@ -2115,7 +2317,8 @@ bool wxMSWDCImpl::DoStretchBlit(wxCoord xdest, wxCoord ydest,
         // than the wxWidgets fall-back implementation. So we need
         // to be able to switch this on and off at runtime.
 #if wxUSE_SYSTEM_OPTIONS
-        if (wxSystemOptions::GetOptionInt(wxT("no-maskblt")) == 0)
+        static bool s_maskBltAllowed = wxSystemOptions::GetOptionInt("no-maskblt") == 0;
+        if ( s_maskBltAllowed )
 #endif
         {
             if ( dstWidth == srcWidth && dstHeight == srcHeight )
@@ -2163,46 +2366,44 @@ bool wxMSWDCImpl::DoStretchBlit(wxCoord xdest, wxCoord ydest,
             HGDIOBJ hOldBufferBitmap = ::SelectObject(dc_buffer, buffer_bmap);
 
             // copy dest to buffer
-            if ( !::BitBlt(dc_buffer, 0, 0, (int)dstWidth, (int)dstHeight,
+            if ( !::BitBlt(dc_buffer, 0, 0, dstWidth, dstHeight,
                            GetHdc(), xdest, ydest, SRCCOPY) )
             {
                 wxLogLastError(wxT("BitBlt"));
             }
 
-#ifndef __WXWINCE__
-            StretchBltModeChanger changeMode(dc_buffer, COLORONCOLOR);
-#endif
+            SET_STRETCH_BLT_MODE(GetHdc());
 
             // copy src to buffer using selected raster op
-            if ( !::StretchBlt(dc_buffer, 0, 0, (int)dstWidth, (int)dstHeight,
+            if ( !::StretchBlt(dc_buffer, 0, 0, dstWidth, dstHeight,
                                hdcSrc, xsrc, ysrc, srcWidth, srcHeight, dwRop) )
             {
                 wxLogLastError(wxT("StretchBlt"));
             }
 
-            // set masked area in buffer to BLACK (pixel value 0)
-            COLORREF prevBkCol = ::SetBkColor(GetHdc(), RGB(255, 255, 255));
-            COLORREF prevCol = ::SetTextColor(GetHdc(), RGB(0, 0, 0));
-            if ( !::StretchBlt(dc_buffer, 0, 0, (int)dstWidth, (int)dstHeight,
-                           dc_mask, xsrcMask, ysrcMask, srcWidth, srcHeight, SRCAND) )
+            // set masked area in buffer to BLACK
             {
-                wxLogLastError(wxT("StretchBlt"));
-            }
+                wxTextColoursChanger textCol2(GetHdc(), *wxBLACK, *wxWHITE);
+                if ( !::StretchBlt(dc_buffer, 0, 0, dstWidth, dstHeight,
+                                   dc_mask, xsrcMask, ysrcMask,
+                                   srcWidth, srcHeight, SRCAND) )
+                {
+                    wxLogLastError(wxT("StretchBlt"));
+                }
 
-            // set unmasked area in dest to BLACK
-            ::SetBkColor(GetHdc(), RGB(0, 0, 0));
-            ::SetTextColor(GetHdc(), RGB(255, 255, 255));
-            if ( !::StretchBlt(GetHdc(), xdest, ydest, (int)dstWidth, (int)dstHeight,
-                           dc_mask, xsrcMask, ysrcMask, srcWidth, srcHeight, SRCAND) )
-            {
-                wxLogLastError(wxT("StretchBlt"));
-            }
-            ::SetBkColor(GetHdc(), prevBkCol);   // restore colours to original values
-            ::SetTextColor(GetHdc(), prevCol);
+                // set unmasked area in dest to BLACK
+                ::SetBkColor(GetHdc(), RGB(0, 0, 0));
+                ::SetTextColor(GetHdc(), RGB(255, 255, 255));
+                if ( !::StretchBlt(GetHdc(), xdest, ydest, dstWidth, dstHeight,
+                                   dc_mask, xsrcMask, ysrcMask,
+                                   srcWidth, srcHeight, SRCAND) )
+                {
+                    wxLogLastError(wxT("StretchBlt"));
+                }
+            } // restore the original text and background colours
 
             // OR buffer to dest
-            success = ::BitBlt(GetHdc(), xdest, ydest,
-                               (int)dstWidth, (int)dstHeight,
+            success = ::BitBlt(GetHdc(), xdest, ydest, dstWidth, dstHeight,
                                dc_buffer, 0, 0, SRCPAINT) != 0;
             if ( !success )
             {
@@ -2239,7 +2440,7 @@ bool wxMSWDCImpl::DoStretchBlit(wxCoord xdest, wxCoord ydest,
                              sizeof(ds),
                              &ds) == sizeof(ds) )
             {
-                StretchBltModeChanger changeMode(GetHdc(), COLORONCOLOR);
+                SET_STRETCH_BLT_MODE(GetHdc());
 
                 // Figure out what co-ordinate system we're supposed to specify
                 // ysrc in.
@@ -2247,7 +2448,7 @@ bool wxMSWDCImpl::DoStretchBlit(wxCoord xdest, wxCoord ydest,
                 if ( hDIB > 0 )
                 {
                     // reflect ysrc
-                    ysrc = hDIB - (ysrc + dstHeight);
+                    ysrc = hDIB - (ysrc + srcHeight);
                 }
 
                 if ( ::StretchDIBits(GetHdc(),
@@ -2278,9 +2479,7 @@ bool wxMSWDCImpl::DoStretchBlit(wxCoord xdest, wxCoord ydest,
 #endif
         // __WXWINCE__
         {
-#ifndef __WXWINCE__
-            StretchBltModeChanger changeMode(GetHdc(), COLORONCOLOR);
-#endif
+            SET_STRETCH_BLT_MODE(GetHdc());
 
             if ( !::StretchBlt
                     (
@@ -2291,7 +2490,7 @@ bool wxMSWDCImpl::DoStretchBlit(wxCoord xdest, wxCoord ydest,
                         dwRop
                     ) )
             {
-                wxLogLastError(_T("StretchBlt"));
+                wxLogLastError(wxT("StretchBlt"));
             }
             else
             {
@@ -2301,17 +2500,10 @@ bool wxMSWDCImpl::DoStretchBlit(wxCoord xdest, wxCoord ydest,
 
         if ( !success )
         {
-            if ( !::BitBlt
-                    (
-                        GetHdc(),
-                        xdest, ydest,
-                        (int)dstWidth, (int)dstHeight,
-                        hdcSrc,
-                        xsrc, ysrc,
-                        dwRop
-                    ) )
+            if ( !::BitBlt(GetHdc(), xdest, ydest, dstWidth, dstHeight,
+                           hdcSrc, xsrc, ysrc, dwRop) )
             {
-                wxLogLastError(_T("BitBlt"));
+                wxLogLastError(wxT("BitBlt"));
             }
             else
             {
@@ -2320,9 +2512,6 @@ bool wxMSWDCImpl::DoStretchBlit(wxCoord xdest, wxCoord ydest,
         }
     }
 
-    ::SetTextColor(GetHdc(), old_textground);
-    ::SetBkColor(GetHdc(), old_background);
-
     return success;
 }
 
@@ -2351,7 +2540,7 @@ void wxMSWDCImpl::DoGetSizeMM(int *w, int *h) const
     {
         int wTotal = ::GetDeviceCaps(GetHdc(), HORZRES);
 
-        wxCHECK_RET( wTotal, _T("0 width device?") );
+        wxCHECK_RET( wTotal, wxT("0 width device?") );
 
         *w = (wPixels * ::GetDeviceCaps(GetHdc(), HORZSIZE)) / wTotal;
     }
@@ -2360,7 +2549,7 @@ void wxMSWDCImpl::DoGetSizeMM(int *w, int *h) const
     {
         int hTotal = ::GetDeviceCaps(GetHdc(), VERTRES);
 
-        wxCHECK_RET( hTotal, _T("0 height device?") );
+        wxCHECK_RET( hTotal, wxT("0 height device?") );
 
         *h = (hPixels * ::GetDeviceCaps(GetHdc(), VERTSIZE)) / hTotal;
     }
@@ -2376,14 +2565,6 @@ wxSize wxMSWDCImpl::GetPPI() const
     return wxSize(x, y);
 }
 
-// For use by wxWidgets only, unless custom units are required.
-void wxMSWDCImpl::SetLogicalScale(double x, double y)
-{
-    WXMICROWIN_CHECK_HDC
-
-    wxDCImpl::SetLogicalScale(x,y);
-}
-
 // ----------------------------------------------------------------------------
 // DC caching
 // ----------------------------------------------------------------------------
@@ -2532,8 +2713,8 @@ static bool AlphaBlt(HDC hdcDst,
                      HDC hdcSrc,
                      const wxBitmap& bmp)
 {
-    wxASSERT_MSG( bmp.IsOk() && bmp.HasAlpha(), _T("AlphaBlt(): invalid bitmap") );
-    wxASSERT_MSG( hdcDst && hdcSrc, _T("AlphaBlt(): invalid HDC") );
+    wxASSERT_MSG( bmp.IsOk() && bmp.HasAlpha(), wxT("AlphaBlt(): invalid bitmap") );
+    wxASSERT_MSG( hdcDst && hdcSrc, wxT("AlphaBlt(): invalid HDC") );
 
     // do we have AlphaBlend() and company in the headers?
 #if defined(AC_SRC_OVER) && wxUSE_DYNLIB_CLASS
@@ -2543,7 +2724,7 @@ static bool AlphaBlt(HDC hdcDst,
                                         BLENDFUNCTION);
 
     static AlphaBlend_t
-        pfnAlphaBlend = (AlphaBlend_t)wxMSIMG32DLL.GetSymbol(_T("AlphaBlend"));
+        pfnAlphaBlend = (AlphaBlend_t)wxMSIMG32DLL.GetSymbol(wxT("AlphaBlend"));
     if ( pfnAlphaBlend )
     {
         BLENDFUNCTION bf;
@@ -2560,7 +2741,7 @@ static bool AlphaBlt(HDC hdcDst,
             return true;
         }
 
-        wxLogLastError(_T("AlphaBlend"));
+        wxLogLastError(wxT("AlphaBlend"));
     }
 #else
     wxUnusedVar(hdcSrc);
@@ -2568,21 +2749,21 @@ static bool AlphaBlt(HDC hdcDst,
 
     // AlphaBlend() unavailable of failed: use our own (probably much slower)
     // implementation
-#ifdef wxHAVE_RAW_BITMAP
+#ifdef wxHAS_RAW_BITMAP
     wxAlphaBlend(hdcDst, x, y, dstWidth, dstHeight, srcX, srcY, srcWidth, srcHeight, bmp);
 
     return true;
-#else // !wxHAVE_RAW_BITMAP
+#else // !wxHAS_RAW_BITMAP
     // no wxAlphaBlend() neither, fall back to using simple BitBlt() (we lose
     // alpha but at least something will be shown like this)
     wxUnusedVar(bmp);
     return false;
-#endif // wxHAVE_RAW_BITMAP
+#endif // wxHAS_RAW_BITMAP/!wxHAS_RAW_BITMAP
 }
 
 
 // wxAlphaBlend: our fallback if ::AlphaBlend() is unavailable
-#ifdef wxHAVE_RAW_BITMAP
+#ifdef wxHAS_RAW_BITMAP
 
 static void
 wxAlphaBlend(HDC hdcDst, int xDst, int yDst,
@@ -2598,7 +2779,7 @@ wxAlphaBlend(HDC hdcDst, int xDst, int yDst,
 
     if ( !::BitBlt(hdcMem, 0, 0, dstWidth, dstHeight, hdcDst, xDst, yDst, SRCCOPY) )
     {
-        wxLogLastError(_T("BitBlt"));
+        wxLogLastError(wxT("BitBlt"));
     }
 
     // combine them with the source bitmap using alpha
@@ -2606,7 +2787,7 @@ wxAlphaBlend(HDC hdcDst, int xDst, int yDst,
                      dataSrc((wxBitmap &)bmpSrc);
 
     wxCHECK_RET( dataDst && dataSrc,
-                    _T("failed to get raw data in wxAlphaBlend") );
+                    wxT("failed to get raw data in wxAlphaBlend") );
 
     wxAlphaPixelData::Iterator pDst(dataDst),
                                pSrc(dataSrc);
@@ -2640,11 +2821,11 @@ wxAlphaBlend(HDC hdcDst, int xDst, int yDst,
     // and finally blit them back to the destination DC
     if ( !::BitBlt(hdcDst, xDst, yDst, dstWidth, dstHeight, hdcMem, 0, 0, SRCCOPY) )
     {
-        wxLogLastError(_T("BitBlt"));
+        wxLogLastError(wxT("BitBlt"));
     }
 }
 
-#endif // #ifdef wxHAVE_RAW_BITMAP
+#endif // wxHAS_RAW_BITMAP
 
 void wxMSWDCImpl::DoGradientFillLinear (const wxRect& rect,
                                  const wxColour& initialColour,
@@ -2658,7 +2839,7 @@ void wxMSWDCImpl::DoGradientFillLinear (const wxRect& rect,
     typedef BOOL
         (WINAPI *GradientFill_t)(HDC, PTRIVERTEX, ULONG, PVOID, ULONG, ULONG);
     static GradientFill_t pfnGradientFill =
-        (GradientFill_t)wxMSIMG32DLL.GetSymbol(_T("GradientFill"));
+        (GradientFill_t)wxMSIMG32DLL.GetSymbol(wxT("GradientFill"));
 
     if ( pfnGradientFill )
     {
@@ -2703,7 +2884,7 @@ void wxMSWDCImpl::DoGradientFillLinear (const wxRect& rect,
             return;
         }
 
-        wxLogLastError(_T("GradientFill"));
+        wxLogLastError(wxT("GradientFill"));
     }
 #endif // wxUSE_DYNLIB_CLASS
 
@@ -2716,7 +2897,7 @@ static DWORD wxGetDCLayout(HDC hdc)
 {
     typedef DWORD (WINAPI *GetLayout_t)(HDC);
     static GetLayout_t
-        wxDL_INIT_FUNC(s_pfn, GetLayout, wxDynamicLibrary(_T("gdi32.dll")));
+        wxDL_INIT_FUNC(s_pfn, GetLayout, wxDynamicLibrary(wxT("gdi32.dll")));
 
     return s_pfnGetLayout ? s_pfnGetLayout(hdc) : (DWORD)-1;
 }
@@ -2735,7 +2916,7 @@ void wxMSWDCImpl::SetLayoutDirection(wxLayoutDirection dir)
 {
     typedef DWORD (WINAPI *SetLayout_t)(HDC, DWORD);
     static SetLayout_t
-        wxDL_INIT_FUNC(s_pfn, SetLayout, wxDynamicLibrary(_T("gdi32.dll")));
+        wxDL_INIT_FUNC(s_pfn, SetLayout, wxDynamicLibrary(wxT("gdi32.dll")));
     if ( !s_pfnSetLayout )
         return;