Renamed m_clientData member variable to avoid clash with variable with same

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

diff --git a/src/msw/dc.cpp b/src/msw/dc.cpp
index 22e2455e0a6217250d2da69fb63100693f517083..f22685ba9726e53ae9dffc683aaee7e4b377e776 100644 (file)
--- a/src/msw/dc.cpp
+++ b/src/msw/dc.cpp
@@ -1,6 +1,6 @@
 /////////////////////////////////////////////////////////////////////////////
 /////////////////////////////////////////////////////////////////////////////

-// Name:        dc.cpp
-// Purpose:     wxDC class
+// Name:        src/msw/dc.cpp
+// Purpose:     wxDC class for MSW port

 // Author:      Julian Smart
 // Modified by:
 // Created:     01/02/97
 // Author:      Julian Smart
 // Modified by:
 // Created:     01/02/97


@@ -17,10 +17,6 @@
 // headers
 // ---------------------------------------------------------------------------
 
 // headers
 // ---------------------------------------------------------------------------
 

-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
-    #pragma implementation "dc.h"
-#endif
-

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


@@ -29,6 +25,7 @@
 #endif
 
 #ifndef WX_PRECOMP
 #endif
 
 #ifndef WX_PRECOMP

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

     #include "wx/image.h"
     #include "wx/window.h"
     #include "wx/dc.h"
     #include "wx/image.h"
     #include "wx/window.h"
     #include "wx/dc.h"


@@ -39,12 +36,12 @@
     #include "wx/dcmemory.h"
     #include "wx/log.h"
     #include "wx/icon.h"
     #include "wx/dcmemory.h"
     #include "wx/log.h"
     #include "wx/icon.h"

+    #include "wx/dcprint.h"
+    #include "wx/module.h"

 #endif
 
 #include "wx/sysopt.h"
 #endif
 
 #include "wx/sysopt.h"

-#include "wx/dcprint.h"
-#include "wx/module.h"
-#include "wx/dynload.h"
+#include "wx/dynlib.h"

 
 #ifdef wxHAVE_RAW_BITMAP
 #include "wx/rawbmp.h"
 
 #ifdef wxHAVE_RAW_BITMAP
 #include "wx/rawbmp.h"


@@ -52,13 +49,16 @@
 
 #include <string.h>
 
 
 #include <string.h>
 

-#include "wx/msw/wrapcdlg.h"

 #ifndef __WIN32__
     #include <print.h>
 #endif
 
 #ifndef AC_SRC_ALPHA
 #ifndef __WIN32__
     #include <print.h>
 #endif
 
 #ifndef AC_SRC_ALPHA

-#define AC_SRC_ALPHA 1
+    #define AC_SRC_ALPHA 1
+#endif
+
+#ifndef LAYOUT_RTL
+    #define LAYOUT_RTL 1

 #endif
 
 /* Quaternary raster codes */
 #endif
 
 /* Quaternary raster codes */


@@ -103,10 +103,10 @@ static const int MM_METRIC = 10;
  */
 
 #ifdef __WXWINCE__
  */
 
 #ifdef __WXWINCE__

-    #define XLOG2DEV(x) ((x-m_logicalOriginX)*m_signX+m_deviceOriginX)
-    #define YLOG2DEV(y) ((y-m_logicalOriginY)*m_signY+m_deviceOriginY)
-    #define XDEV2LOG(x) ((x-m_deviceOriginX)*m_signX+m_logicalOriginX)
-    #define YDEV2LOG(y) ((y-m_deviceOriginY)*m_signY+m_logicalOriginY)
+    #define XLOG2DEV(x) ((x-m_logicalOriginX)*m_signX)
+    #define YLOG2DEV(y) ((y-m_logicalOriginY)*m_signY)
+    #define XDEV2LOG(x) ((x)*m_signX+m_logicalOriginX)
+    #define YDEV2LOG(y) ((y)*m_signY+m_logicalOriginY)

 #else
     #define XLOG2DEV(x) (x)
     #define YLOG2DEV(y) (y)
 #else
     #define XLOG2DEV(x) (x)
     #define YLOG2DEV(y) (y)


@@ -131,14 +131,17 @@ static inline double DegToRad(double deg) { return (deg * M_PI) / 180.0; }
 // otherwise
 static bool AlphaBlt(HDC hdcDst,
                      int x, int y, int w, int h,
 // otherwise
 static bool AlphaBlt(HDC hdcDst,
                      int x, int y, int w, int h,

-                     HDC hdcSrc,
+                     int srcX, int srcY, HDC hdcSrc,

                      const wxBitmap& bmpSrc);
 
 #ifdef wxHAVE_RAW_BITMAP
                      const wxBitmap& bmpSrc);
 
 #ifdef wxHAVE_RAW_BITMAP

-// our (limited) AlphaBlend() replacement
+
+// our (limited) AlphaBlend() replacement for Windows versions not providing it

 static void
 static void

-wxAlphaBlend(HDC hdcDst, int x, int y, int w, int h, const wxBitmap& bmp);
-#endif
+wxAlphaBlend(HDC hdcDst, int x, int y, int w, int h,
+             int srcX, int srcY, const wxBitmap& bmp);
+
+#endif // wxHAVE_RAW_BITMAP

 
 // ----------------------------------------------------------------------------
 // private classes
 
 // ----------------------------------------------------------------------------
 // private classes


@@ -170,15 +173,14 @@ private:
 class StretchBltModeChanger
 {
 public:
 class StretchBltModeChanger
 {
 public:

-    StretchBltModeChanger(HDC hdc, int mode)
+    StretchBltModeChanger(HDC hdc,
+                          int WXUNUSED_IN_WINCE(mode))

         : m_hdc(hdc)
     {
 #ifndef __WXWINCE__
         m_modeOld = ::SetStretchBltMode(m_hdc, mode);
         if ( !m_modeOld )
             wxLogLastError(_T("SetStretchBltMode"));
         : m_hdc(hdc)
     {
 #ifndef __WXWINCE__
         m_modeOld = ::SetStretchBltMode(m_hdc, mode);
         if ( !m_modeOld )
             wxLogLastError(_T("SetStretchBltMode"));

-#else
-        wxUnusedVar(mode);

 #endif
     }
 
 #endif
     }
 


@@ -198,6 +200,45 @@ private:
     DECLARE_NO_COPY_CLASS(StretchBltModeChanger)
 };
 
     DECLARE_NO_COPY_CLASS(StretchBltModeChanger)
 };
 

+// helper class to cache dynamically loaded libraries and not attempt reloading
+// them if it fails
+class wxOnceOnlyDLLLoader
+{
+public:
+    // ctor argument must be a literal string as we don't make a copy of it!
+    wxOnceOnlyDLLLoader(const wxChar *dllName)
+        : m_dllName(dllName)
+    {
+    };
+
+
+    // return the symbol with the given name or NULL if the DLL not loaded
+    // or symbol not present
+    void *GetSymbol(const wxChar *name)
+    {
+        // we're prepared to handle errors here
+        wxLogNull noLog;
+
+        if ( m_dllName )
+        {
+            m_dll.Load(m_dllName);
+
+            // reset the name whether we succeeded or failed so that we don't
+            // try again the next time
+            m_dllName = NULL;
+        }
+
+        return m_dll.IsLoaded() ? m_dll.GetSymbol(name) : NULL;
+    }
+
+private:
+    wxDynamicLibrary m_dll;
+    const wxChar *m_dllName;
+};
+
+static wxOnceOnlyDLLLoader wxGDI32DLL(_T("gdi32"));
+static wxOnceOnlyDLLLoader wxMSIMG32DLL(_T("msimg32"));
+

 // ===========================================================================
 // implementation
 // ===========================================================================
 // ===========================================================================
 // implementation
 // ===========================================================================


@@ -260,23 +301,6 @@ wxColourChanger::~wxColourChanger()
 // wxDC
 // ---------------------------------------------------------------------------
 
 // wxDC
 // ---------------------------------------------------------------------------
 

-// Default constructor
-wxDC::wxDC()
-{
-    m_canvas = NULL;
-
-    m_oldBitmap = 0;
-    m_oldPen = 0;
-    m_oldBrush = 0;
-    m_oldFont = 0;
-#if wxUSE_PALETTE
-    m_oldPalette = 0;
-#endif // wxUSE_PALETTE
-
-    m_bOwnsDC = false;
-    m_hDC = 0;
-}
-

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


@@ -407,6 +431,12 @@ void wxDC::SetClippingHrgn(WXHRGN hrgn)
     if ( !::GetClipBox(GetHdc(), &rectClip) )
         return;
 
     if ( !::GetClipBox(GetHdc(), &rectClip) )
         return;
 

+    // GetClipBox returns logical coordinates, so transform to device
+    rectClip.left = LogicalToDeviceX(rectClip.left);
+    rectClip.top = LogicalToDeviceY(rectClip.top);
+    rectClip.right = LogicalToDeviceX(rectClip.right);
+    rectClip.bottom = LogicalToDeviceY(rectClip.bottom);
+

     HRGN hrgnDest = ::CreateRectRgn(0, 0, 0, 0);
     HRGN hrgnClipOld = ::CreateRectRgn(rectClip.left, rectClip.top,
                                        rectClip.right, rectClip.bottom);
     HRGN hrgnDest = ::CreateRectRgn(0, 0, 0, 0);
     HRGN hrgnClipOld = ::CreateRectRgn(rectClip.left, rectClip.top,
                                        rectClip.right, rectClip.bottom);


@@ -465,6 +495,14 @@ void wxDC::DestroyClippingRegion()
 
     if (m_clipping && m_hDC)
     {
 
     if (m_clipping && m_hDC)
     {

+#if 1
+        // On a PocketPC device (not necessarily emulator), resetting
+        // the clip region as per the old method causes bad display
+        // problems. In fact setting a null region is probably OK
+        // on desktop WIN32 also, since the WIN32 docs imply that the user
+        // clipping region is independent from the paint clipping region.
+        ::SelectClipRgn(GetHdc(), 0);
+#else

         // 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
         // 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


@@ -472,6 +510,7 @@ void wxDC::DestroyClippingRegion()
         HRGN rgn = CreateRectRgn(0, 0, 32000, 32000);
         ::SelectClipRgn(GetHdc(), rgn);
         ::DeleteObject(rgn);
         HRGN rgn = CreateRectRgn(0, 0, 32000, 32000);
         ::SelectClipRgn(GetHdc(), rgn);
         ::DeleteObject(rgn);

+#endif

     }
 
     wxDCBase::DestroyClippingRegion();
     }
 
     wxDCBase::DestroyClippingRegion();


@@ -527,9 +566,9 @@ void wxDC::Clear()
         if (!m_selectedBitmap.Ok())
             return;
 
         if (!m_selectedBitmap.Ok())
             return;
 

-        rect.left = 0; rect.top = 0;
-        rect.right = m_selectedBitmap.GetWidth();
-        rect.bottom = m_selectedBitmap.GetHeight();
+        rect.left = -m_deviceOriginX; rect.top = -m_deviceOriginY;
+        rect.right = m_selectedBitmap.GetWidth()-m_deviceOriginX;
+        rect.bottom = m_selectedBitmap.GetHeight()-m_deviceOriginY;

     }
 
 #ifndef __WXWINCE__
     }
 
 #ifndef __WXWINCE__


@@ -554,16 +593,14 @@ void wxDC::Clear()
 #endif
 }
 
 #endif
 }
 

-bool wxDC::DoFloodFill(wxCoord x, wxCoord y, const wxColour& col, int style)
+bool wxDC::DoFloodFill(wxCoord WXUNUSED_IN_WINCE(x),
+                       wxCoord WXUNUSED_IN_WINCE(y),
+                       const wxColour& WXUNUSED_IN_WINCE(col),
+                       int WXUNUSED_IN_WINCE(style))

 {
 #ifdef __WXWINCE__
 {
 #ifdef __WXWINCE__

-    wxUnusedVar(x);
-    wxUnusedVar(y);
-    wxUnusedVar(col);
-    wxUnusedVar(style);

     return false;
 #else
     return false;
 #else

-

     WXMICROWIN_CHECK_HDC_RET(false)
 
     bool success = (0 != ::ExtFloodFill(GetHdc(), XLOG2DEV(x), YLOG2DEV(y),
     WXMICROWIN_CHECK_HDC_RET(false)
 
     bool success = (0 != ::ExtFloodFill(GetHdc(), XLOG2DEV(x), YLOG2DEV(y),


@@ -699,12 +736,13 @@ void wxDC::DoDrawArc(wxCoord x1, wxCoord y1,
 void wxDC::DoDrawCheckMark(wxCoord x1, wxCoord y1,
                            wxCoord width, wxCoord height)
 {
 void wxDC::DoDrawCheckMark(wxCoord x1, wxCoord y1,
                            wxCoord width, wxCoord height)
 {

-    WXMICROWIN_CHECK_HDC
-
+    // cases when we don't have DrawFrameControl()
+#if defined(__SYMANTEC__) || defined(__WXMICROWIN__)
+    return wxDCBase::DoDrawCheckMark(x1, y1, width, height);
+#else // normal case

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

-#if defined(__WIN32__) && !defined(__SYMANTEC__) && !defined(__WXMICROWIN__)

     RECT rect;
     rect.left   = x1;
     rect.top    = y1;
     RECT rect;
     rect.left   = x1;
     rect.top    = y1;


@@ -716,25 +754,10 @@ void wxDC::DoDrawCheckMark(wxCoord x1, wxCoord y1,
 #else
     DrawFrameControl(GetHdc(), &rect, DFC_MENU, DFCS_MENUCHECK);
 #endif
 #else
     DrawFrameControl(GetHdc(), &rect, DFC_MENU, DFCS_MENUCHECK);
 #endif

-#else // Symantec-MicroWin
-    // draw a cross
-    HPEN blackPen = ::CreatePen(PS_SOLID, 1, RGB(0, 0, 0));
-    HPEN whiteBrush = (HPEN)::GetStockObject(WHITE_BRUSH);
-    HPEN hPenOld = (HPEN)::SelectObject(GetHdc(), blackPen);
-    HPEN hBrushOld = (HPEN)::SelectObject(GetHdc(), whiteBrush);
-    ::SetROP2(GetHdc(), R2_COPYPEN);
-    Rectangle(GetHdc(), x1, y1, x2, y2);
-    MoveToEx(GetHdc(), x1, y1, NULL);
-    LineTo(GetHdc(), x2, y2);
-    MoveToEx(GetHdc(), x2, y1, NULL);
-    LineTo(GetHdc(), x1, y2);
-    ::SelectObject(GetHdc(), hPenOld);
-    ::SelectObject(GetHdc(), hBrushOld);
-    ::DeleteObject(blackPen);
-#endif // Win32/Symantec-MicroWin

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

+#endif // Microwin/Normal

 }
 
 void wxDC::DoDrawPoint(wxCoord x, wxCoord y)
 }
 
 void wxDC::DoDrawPoint(wxCoord x, wxCoord y)


@@ -752,7 +775,11 @@ void wxDC::DoDrawPoint(wxCoord x, wxCoord y)
     CalcBoundingBox(x, y);
 }
 
     CalcBoundingBox(x, y);
 }
 

-void wxDC::DoDrawPolygon(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset,int fillStyle)
+void wxDC::DoDrawPolygon(int n,
+                         wxPoint points[],
+                         wxCoord xoffset,
+                         wxCoord yoffset,
+                         int WXUNUSED_IN_WINCE(fillStyle))

 {
     WXMICROWIN_CHECK_HDC
 
 {
     WXMICROWIN_CHECK_HDC
 


@@ -772,8 +799,6 @@ void wxDC::DoDrawPolygon(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffs
         }
 #ifndef __WXWINCE__
         int prev = SetPolyFillMode(GetHdc(),fillStyle==wxODDEVEN_RULE?ALTERNATE:WINDING);
         }
 #ifndef __WXWINCE__
         int prev = SetPolyFillMode(GetHdc(),fillStyle==wxODDEVEN_RULE?ALTERNATE:WINDING);

-#else
-        wxUnusedVar(fillStyle);

 #endif
         (void)Polygon(GetHdc(), cpoints, n);
 #ifndef __WXWINCE__
 #endif
         (void)Polygon(GetHdc(), cpoints, n);
 #ifndef __WXWINCE__


@@ -972,6 +997,105 @@ void wxDC::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
     CalcBoundingBox(x2, y2);
 }
 
     CalcBoundingBox(x2, y2);
 }
 

+#if wxUSE_SPLINES
+void wxDC::DoDrawSpline(wxList *points)
+{
+#ifdef  __WXWINCE__
+    // WinCE does not support ::PolyBezier so use generic version
+    wxDCBase::DoDrawSpline(points);
+#else
+    // quadratic b-spline to cubic bezier spline conversion
+    //
+    // quadratic spline with control points P0,P1,P2
+    // P(s) = P0*(1-s)^2 + P1*2*(1-s)*s + P2*s^2
+    //
+    // bezier spline with control points B0,B1,B2,B3
+    // B(s) = B0*(1-s)^3 + B1*3*(1-s)^2*s + B2*3*(1-s)*s^2 + B3*s^3
+    //
+    // control points of bezier spline calculated from b-spline
+    // B0 = P0
+    // B1 = (2*P1 + P0)/3
+    // B2 = (2*P1 + P2)/3
+    // B3 = P2
+
+    WXMICROWIN_CHECK_HDC
+
+    wxASSERT_MSG( points, wxT("NULL pointer to spline points?") );
+
+    const size_t n_points = points->GetCount();
+    wxASSERT_MSG( n_points > 2 , wxT("incomplete list of spline points?") );
+
+    const size_t n_bezier_points = n_points * 3 + 1;
+    POINT *lppt = (POINT *)malloc(n_bezier_points*sizeof(POINT));
+    size_t bezier_pos = 0;
+    wxCoord x1, y1, x2, y2, cx1, cy1, cx4, cy4;
+
+    wxList::compatibility_iterator node = points->GetFirst();
+    wxPoint *p = (wxPoint *)node->GetData();
+    lppt[ bezier_pos ].x = x1 = p->x;
+    lppt[ bezier_pos ].y = y1 = p->y;
+    bezier_pos++;
+    lppt[ bezier_pos ] = lppt[ bezier_pos-1 ];
+    bezier_pos++;
+
+    node = node->GetNext();
+    p = (wxPoint *)node->GetData();
+
+    x2 = p->x;
+    y2 = p->y;
+    cx1 = ( x1 + x2 ) / 2;
+    cy1 = ( y1 + y2 ) / 2;
+    lppt[ bezier_pos ].x = XLOG2DEV(cx1);
+    lppt[ bezier_pos ].y = YLOG2DEV(cy1);
+    bezier_pos++;
+    lppt[ bezier_pos ] = lppt[ bezier_pos-1 ];
+    bezier_pos++;
+
+#if !wxUSE_STL
+    while ((node = node->GetNext()) != NULL)
+#else
+    while ((node = node->GetNext()))
+#endif // !wxUSE_STL
+    {
+        p = (wxPoint *)node->GetData();
+        x1 = x2;
+        y1 = y2;
+        x2 = p->x;
+        y2 = p->y;
+        cx4 = (x1 + x2) / 2;
+        cy4 = (y1 + y2) / 2;
+        // B0 is B3 of previous segment
+        // B1:
+        lppt[ bezier_pos ].x = XLOG2DEV((x1*2+cx1)/3);
+        lppt[ bezier_pos ].y = YLOG2DEV((y1*2+cy1)/3);
+        bezier_pos++;
+        // B2:
+        lppt[ bezier_pos ].x = XLOG2DEV((x1*2+cx4)/3);
+        lppt[ bezier_pos ].y = YLOG2DEV((y1*2+cy4)/3);
+        bezier_pos++;
+        // B3:
+        lppt[ bezier_pos ].x = XLOG2DEV(cx4);
+        lppt[ bezier_pos ].y = YLOG2DEV(cy4);
+        bezier_pos++;
+        cx1 = cx4;
+        cy1 = cy4;
+    }
+
+    lppt[ bezier_pos ] = lppt[ bezier_pos-1 ];
+    bezier_pos++;
+    lppt[ bezier_pos ].x = XLOG2DEV(x2);
+    lppt[ bezier_pos ].y = YLOG2DEV(y2);
+    bezier_pos++;
+    lppt[ bezier_pos ] = lppt[ bezier_pos-1 ];
+    bezier_pos++;
+
+    ::PolyBezier( GetHdc(), lppt, bezier_pos );
+
+    free(lppt);
+#endif
+}
+#endif
+

 // Chris Breeze 20/5/98: first implementation of DrawEllipticArc on Windows
 void wxDC::DoDrawEllipticArc(wxCoord x,wxCoord y,wxCoord w,wxCoord h,double sa,double ea)
 {
 // Chris Breeze 20/5/98: first implementation of DrawEllipticArc on Windows
 void wxDC::DoDrawEllipticArc(wxCoord x,wxCoord y,wxCoord w,wxCoord h,double sa,double ea)
 {


@@ -1059,7 +1183,7 @@ void wxDC::DoDrawBitmap( const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask
         MemoryHDC hdcMem;
         SelectInHDC select(hdcMem, GetHbitmapOf(bmp));
 
         MemoryHDC hdcMem;
         SelectInHDC select(hdcMem, GetHbitmapOf(bmp));
 

-        if ( AlphaBlt(GetHdc(), x, y, width, height, hdcMem, bmp) )
+        if ( AlphaBlt(GetHdc(), x, y, width, height, 0, 0, hdcMem, bmp) )

             return;
     }
 
             return;
     }
 


@@ -1376,7 +1500,7 @@ void wxDC::SetFont(const wxFont& font)
         else // selected ok
         {
             if ( !m_oldFont )
         else // selected ok
         {
             if ( !m_oldFont )

-                m_oldFont = (WXHPEN)hfont;
+                m_oldFont = (WXHFONT)hfont;

 
             m_font = font;
         }
 
             m_font = font;
         }


@@ -1469,7 +1593,7 @@ void wxDC::SetBrush(const wxBrush& brush)
         else // selected ok
         {
             if ( !m_oldBrush )
         else // selected ok
         {
             if ( !m_oldBrush )

-                m_oldBrush = (WXHPEN)hbrush;
+                m_oldBrush = (WXHBRUSH)hbrush;

 
             m_brush = brush;
         }
 
             m_brush = brush;
         }


@@ -1627,10 +1751,42 @@ void wxDC::DoGetTextExtent(const wxString& string, wxCoord *x, wxCoord *y,
     }
 
     SIZE sizeRect;
     }
 
     SIZE sizeRect;

-    TEXTMETRIC tm;
+    const size_t len = string.length();
+    if ( !::GetTextExtentPoint32(GetHdc(), string, len, &sizeRect) )
+    {
+        wxLogLastError(_T("GetTextExtentPoint32()"));
+    }
+
+#if !defined(_WIN32_WCE) || (_WIN32_WCE >= 400)
+    // the result computed by GetTextExtentPoint32() may be too small as it
+    // accounts for under/overhang of the first/last character while we want
+    // just the bounding rect for this string so adjust the width as needed
+    // (using API not available in 2002 SDKs of WinCE)
+    if ( len > 0 )
+    {
+        ABC width;
+        const wxChar chFirst = *string.begin();
+        if ( ::GetCharABCWidths(GetHdc(), chFirst, chFirst, &width) )
+        {
+            if ( width.abcA < 0 )
+                sizeRect.cx -= width.abcA;
+
+            if ( len > 1 )
+            {
+                const wxChar chLast = *string.rbegin();
+                ::GetCharABCWidths(GetHdc(), chLast, chLast, &width);
+            }
+            //else: we already have the width of the last character

 
 

-    GetTextExtentPoint(GetHdc(), string, string.length(), &sizeRect);
-    GetTextMetrics(GetHdc(), &tm);
+            if ( width.abcC < 0 )
+                sizeRect.cx -= width.abcC;
+        }
+        //else: GetCharABCWidths() failed, not a TrueType font?
+    }
+#endif // !defined(_WIN32_WCE) || (_WIN32_WCE >= 400)
+
+    TEXTMETRIC tm;
+    ::GetTextMetrics(GetHdc(), &tm);

 
     if (x)
         *x = sizeRect.cx;
 
     if (x)
         *x = sizeRect.cx;


@@ -1657,18 +1813,20 @@ bool wxDC::DoGetPartialTextExtents(const wxString& text, wxArrayInt& widths) con
     static int maxWidth = -1;
     int fit = 0;
     SIZE sz = {0,0};
     static int maxWidth = -1;
     int fit = 0;
     SIZE sz = {0,0};

-    int stlen = text.Length();
+    int stlen = text.length();

 
     if (maxLenText == -1)
     {
         // Win9x and WinNT+ have different limits
         int version = wxGetOsVersion();
 
     if (maxLenText == -1)
     {
         // Win9x and WinNT+ have different limits
         int version = wxGetOsVersion();

-        maxLenText = version == wxWINDOWS_NT ? 65535 : 8192;
-        maxWidth =   version == wxWINDOWS_NT ? INT_MAX : 32767;
+        maxLenText = version == wxOS_WINDOWS_NT ? 65535 : 8192;
+        maxWidth =   version == wxOS_WINDOWS_NT ? INT_MAX : 32767;

     }
 
     widths.Empty();
     widths.Add(0, stlen);  // fill the array with zeros
     }
 
     widths.Empty();
     widths.Add(0, stlen);  // fill the array with zeros

+    if (stlen == 0)
+        return true;

 
     if (!::GetTextExtentExPoint(GetHdc(),
                                 text.c_str(),           // string to check
 
     if (!::GetTextExtentExPoint(GetHdc(),
                                 text.c_str(),           // string to check


@@ -1774,7 +1932,8 @@ void wxDC::SetUserScale(double x, double y)
     this->SetMapMode(m_mappingMode);
 }
 
     this->SetMapMode(m_mappingMode);
 }
 

-void wxDC::SetAxisOrientation(bool xLeftRight, bool yBottomUp)
+void wxDC::SetAxisOrientation(bool WXUNUSED_IN_WINCE(xLeftRight),
+                              bool WXUNUSED_IN_WINCE(yBottomUp))

 {
     WXMICROWIN_CHECK_HDC
 
 {
     WXMICROWIN_CHECK_HDC
 


@@ -1789,9 +1948,6 @@ void wxDC::SetAxisOrientation(bool xLeftRight, bool yBottomUp)
 
         SetMapMode(m_mappingMode);
     }
 
         SetMapMode(m_mappingMode);
     }

-#else
-    wxUnusedVar(xLeftRight);
-    wxUnusedVar(yBottomUp);

 #endif
 }
 
 #endif
 }
 


@@ -1835,9 +1991,7 @@ void wxDC::SetDeviceOrigin(wxCoord x, wxCoord y)
     m_deviceOriginX = x;
     m_deviceOriginY = y;
 
     m_deviceOriginX = x;
     m_deviceOriginY = y;
 

-#ifndef __WXWINCE__

     ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
     ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);

-#endif

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


@@ -1909,7 +2063,7 @@ bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest,
             (m_selectedBitmap.Ok() && m_selectedBitmap.HasAlpha())) )
     {
         if ( AlphaBlt(GetHdc(), xdest, ydest, width, height,
             (m_selectedBitmap.Ok() && m_selectedBitmap.HasAlpha())) )
     {
         if ( AlphaBlt(GetHdc(), xdest, ydest, width, height,

-                      GetHdcOf(*source), bmpSrc) )
+                      xsrc, ysrc, GetHdcOf(*source), bmpSrc) )

             return true;
     }
 
             return true;
     }
 


@@ -2116,7 +2270,7 @@ bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest,
                                      ds.dsBm.bmBits,
                                      (LPBITMAPINFO)&ds.dsBmih,
                                      DIB_RGB_COLORS,
                                      ds.dsBm.bmBits,
                                      (LPBITMAPINFO)&ds.dsBmih,
                                      DIB_RGB_COLORS,

-                                     SRCCOPY
+                                     dwRop

                                      ) == (int)GDI_ERROR )
                 {
                     // On Win9x this API fails most (all?) of the time, so
                                      ) == (int)GDI_ERROR )
                 {
                     // On Win9x this API fails most (all?) of the time, so


@@ -2184,12 +2338,14 @@ bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest,
     return success;
 }
 
     return success;
 }
 

-void wxDC::DoGetSize(int *w, int *h) const
+void wxDC::GetDeviceSize(int *width, int *height) const

 {
     WXMICROWIN_CHECK_HDC
 
 {
     WXMICROWIN_CHECK_HDC
 

-    if ( w ) *w = ::GetDeviceCaps(GetHdc(), HORZRES);
-    if ( h ) *h = ::GetDeviceCaps(GetHdc(), VERTRES);
+    if ( width )
+        *width = ::GetDeviceCaps(GetHdc(), HORZRES);
+    if ( height )
+        *height = ::GetDeviceCaps(GetHdc(), VERTRES);

 }
 
 void wxDC::DoGetSizeMM(int *w, int *h) const
 }
 
 void wxDC::DoGetSizeMM(int *w, int *h) const


@@ -2384,7 +2540,7 @@ IMPLEMENT_DYNAMIC_CLASS(wxDCModule, wxModule)
 
 static bool AlphaBlt(HDC hdcDst,
                      int x, int y, int width, int height,
 
 static bool AlphaBlt(HDC hdcDst,
                      int x, int y, int width, int height,

-                     HDC hdcSrc,
+                     int srcX, int srcY, HDC hdcSrc,

                      const wxBitmap& bmp)
 {
     wxASSERT_MSG( bmp.Ok() && bmp.HasAlpha(), _T("AlphaBlt(): invalid bitmap") );
                      const wxBitmap& bmp)
 {
     wxASSERT_MSG( bmp.Ok() && bmp.HasAlpha(), _T("AlphaBlt(): invalid bitmap") );


@@ -2397,32 +2553,8 @@ static bool AlphaBlt(HDC hdcDst,
                                         HDC,int,int,int,int,
                                         BLENDFUNCTION);
 
                                         HDC,int,int,int,int,
                                         BLENDFUNCTION);
 

-    // bitmaps can be drawn only from GUI thread so there is no need to
-    // protect this static variable from multiple threads
-    static bool s_triedToLoad = false;
-    static AlphaBlend_t pfnAlphaBlend = NULL;
-    if ( !s_triedToLoad )
-    {
-        s_triedToLoad = true;
-
-        // don't give errors about the DLL being unavailable, we're
-        // prepared to handle this
-        wxLogNull nolog;
-
-        wxDynamicLibrary dll(_T("msimg32.dll"));
-        if ( dll.IsLoaded() )
-        {
-            pfnAlphaBlend = (AlphaBlend_t)dll.GetSymbol(_T("AlphaBlend"));
-            if ( pfnAlphaBlend )
-            {
-                // we must keep the DLL loaded if we want to be able to
-                // call AlphaBlend() so just never unload it at all, not a
-                // big deal
-                dll.Detach();
-            }
-        }
-    }
-
+    static AlphaBlend_t
+        pfnAlphaBlend = (AlphaBlend_t)wxMSIMG32DLL.GetSymbol(_T("AlphaBlend"));

     if ( pfnAlphaBlend )
     {
         BLENDFUNCTION bf;
     if ( pfnAlphaBlend )
     {
         BLENDFUNCTION bf;


@@ -2432,7 +2564,7 @@ static bool AlphaBlt(HDC hdcDst,
         bf.AlphaFormat = AC_SRC_ALPHA;
 
         if ( pfnAlphaBlend(hdcDst, x, y, width, height,
         bf.AlphaFormat = AC_SRC_ALPHA;
 
         if ( pfnAlphaBlend(hdcDst, x, y, width, height,

-                           hdcSrc, 0, 0, width, height,
+                           hdcSrc, srcX, srcY, width, height,

                            bf) )
         {
             // skip wxAlphaBlend() call below
                            bf) )
         {
             // skip wxAlphaBlend() call below


@@ -2441,12 +2573,14 @@ static bool AlphaBlt(HDC hdcDst,
 
         wxLogLastError(_T("AlphaBlend"));
     }
 
         wxLogLastError(_T("AlphaBlend"));
     }

+#else
+    wxUnusedVar(hdcSrc);

 #endif // defined(AC_SRC_OVER)
 
     // AlphaBlend() unavailable of failed: use our own (probably much slower)
     // implementation
 #ifdef wxHAVE_RAW_BITMAP
 #endif // defined(AC_SRC_OVER)
 
     // AlphaBlend() unavailable of failed: use our own (probably much slower)
     // implementation
 #ifdef wxHAVE_RAW_BITMAP

-    wxAlphaBlend(hdcDst, x, y, width, height, bmp);
+    wxAlphaBlend(hdcDst, x, y, width, height, srcX, srcY, bmp);

 
     return true;
 #else // !wxHAVE_RAW_BITMAP
 
     return true;
 #else // !wxHAVE_RAW_BITMAP


@@ -2462,14 +2596,16 @@ static bool AlphaBlt(HDC hdcDst,
 #ifdef wxHAVE_RAW_BITMAP
 
 static void
 #ifdef wxHAVE_RAW_BITMAP
 
 static void

-wxAlphaBlend(HDC hdcDst, int xDst, int yDst, int w, int h, const wxBitmap& bmpSrc)
+wxAlphaBlend(HDC hdcDst, int xDst, int yDst,
+             int w, int h,
+             int srcX, int srcY, const wxBitmap& bmpSrc)

 {
     // get the destination DC pixels
     wxBitmap bmpDst(w, h, 32 /* force creating RGBA DIB */);
     MemoryHDC hdcMem;
     SelectInHDC select(hdcMem, GetHbitmapOf(bmpDst));
 
 {
     // get the destination DC pixels
     wxBitmap bmpDst(w, h, 32 /* force creating RGBA DIB */);
     MemoryHDC hdcMem;
     SelectInHDC select(hdcMem, GetHbitmapOf(bmpDst));
 

-    if ( !::BitBlt(hdcMem, 0, 0, w, h, hdcDst, 0, 0, SRCCOPY) )
+    if ( !::BitBlt(hdcMem, 0, 0, w, h, hdcDst, xDst, yDst, SRCCOPY) )

     {
         wxLogLastError(_T("BitBlt"));
     }
     {
         wxLogLastError(_T("BitBlt"));
     }


@@ -2484,6 +2620,8 @@ wxAlphaBlend(HDC hdcDst, int xDst, int yDst, int w, int h, const wxBitmap& bmpSr
     wxAlphaPixelData::Iterator pDst(dataDst),
                                pSrc(dataSrc);
 
     wxAlphaPixelData::Iterator pDst(dataDst),
                                pSrc(dataSrc);
 

+    pSrc.Offset(dataSrc, srcX, srcY);
+

     for ( int y = 0; y < h; y++ )
     {
         wxAlphaPixelData::Iterator pDstRowStart = pDst,
     for ( int y = 0; y < h; y++ )
     {
         wxAlphaPixelData::Iterator pDstRowStart = pDst,


@@ -2517,3 +2655,110 @@ wxAlphaBlend(HDC hdcDst, int xDst, int yDst, int w, int h, const wxBitmap& bmpSr
 }
 
 #endif // #ifdef wxHAVE_RAW_BITMAP
 }
 
 #endif // #ifdef wxHAVE_RAW_BITMAP

+
+void wxDC::DoGradientFillLinear (const wxRect& rect,
+                                 const wxColour& initialColour,
+                                 const wxColour& destColour,
+                                 wxDirection nDirection)
+{
+    // use native function if we have compile-time support it and can load it
+    // during run-time (linking to it statically would make the program
+    // unusable on earlier Windows versions)
+#if defined(GRADIENT_FILL_RECT_H) && wxUSE_DYNLIB_CLASS
+    typedef BOOL
+        (WINAPI *GradientFill_t)(HDC, PTRIVERTEX, ULONG, PVOID, ULONG, ULONG);
+    static GradientFill_t pfnGradientFill =
+        (GradientFill_t)wxMSIMG32DLL.GetSymbol(_T("GradientFill"));
+
+    if ( pfnGradientFill )
+    {
+        GRADIENT_RECT grect;
+        grect.UpperLeft = 0;
+        grect.LowerRight = 1;
+
+        // invert colours direction if not filling from left-to-right or
+        // top-to-bottom
+        int firstVertex = nDirection == wxNORTH || nDirection == wxWEST ? 1 : 0;
+
+        // one vertex for upper left and one for upper-right
+        TRIVERTEX vertices[2];
+
+        vertices[0].x = rect.GetLeft();
+        vertices[0].y = rect.GetTop();
+        vertices[1].x = rect.GetRight();
+        vertices[1].y = rect.GetBottom();
+
+        vertices[firstVertex].Red = (COLOR16)(initialColour.Red() << 8);
+        vertices[firstVertex].Green = (COLOR16)(initialColour.Green() << 8);
+        vertices[firstVertex].Blue = (COLOR16)(initialColour.Blue() << 8);
+        vertices[firstVertex].Alpha = 0;
+        vertices[1 - firstVertex].Red = (COLOR16)(destColour.Red() << 8);
+        vertices[1 - firstVertex].Green = (COLOR16)(destColour.Green() << 8);
+        vertices[1 - firstVertex].Blue = (COLOR16)(destColour.Blue() << 8);
+        vertices[1 - firstVertex].Alpha = 0;
+
+        if ( (*pfnGradientFill)
+             (
+                GetHdc(),
+                vertices,
+                WXSIZEOF(vertices),
+                &grect,
+                1,
+                nDirection == wxWEST || nDirection == wxEAST
+                    ? GRADIENT_FILL_RECT_H
+                    : GRADIENT_FILL_RECT_V
+             ) )
+        {
+            // skip call of the base class version below
+            return;
+        }
+
+        wxLogLastError(_T("GradientFill"));
+    }
+#endif // wxUSE_DYNLIB_CLASS
+
+    wxDCBase::DoGradientFillLinear(rect, initialColour, destColour, nDirection);
+}
+
+static DWORD wxGetDCLayout(HDC hdc)
+{
+    typedef DWORD (WINAPI *GetLayout_t)(HDC);
+    static GetLayout_t
+        pfnGetLayout = (GetLayout_t)wxGDI32DLL.GetSymbol(_T("GetLayout"));
+
+    return pfnGetLayout ? pfnGetLayout(hdc) : (DWORD)-1;
+}
+
+wxLayoutDirection wxDC::GetLayoutDirection() const
+{
+    DWORD layout = wxGetDCLayout(GetHdc());
+
+    if ( layout == (DWORD)-1 )
+        return wxLayout_Default;
+
+    return layout & LAYOUT_RTL ? wxLayout_RightToLeft : wxLayout_LeftToRight;
+}
+
+void wxDC::SetLayoutDirection(wxLayoutDirection dir)
+{
+    typedef DWORD (WINAPI *SetLayout_t)(HDC, DWORD);
+    static SetLayout_t
+        pfnSetLayout = (SetLayout_t)wxGDI32DLL.GetSymbol(_T("SetLayout"));
+    if ( !pfnSetLayout )
+        return;
+
+    if ( dir == wxLayout_Default )
+    {
+        dir = wxTheApp->GetLayoutDirection();
+        if ( dir == wxLayout_Default )
+            return;
+    }
+
+    DWORD layout = wxGetDCLayout(GetHdc());
+    if ( dir == wxLayout_RightToLeft )
+        layout |= LAYOUT_RTL;
+    else
+        layout &= ~LAYOUT_RTL;
+
+    pfnSetLayout(GetHdc(), layout);
+}