]> git.saurik.com Git - wxWidgets.git/blobdiff - src/msw/dcprint.cpp
don't let WM_RBUTTONDOWN reach def window proc as it would enter a local modal messag...
[wxWidgets.git] / src / msw / dcprint.cpp
index 8105eec4413e8a4ed55a9ed49d04b0443554db28..5c90a1f9e5c5105838de40833ffb7b117f5cef1f 100644 (file)
@@ -5,7 +5,7 @@
 // Modified by:
 // Created:     01/02/97
 // RCS-ID:      $Id$
-// Copyright:   (c) Julian Smart and Markus Holzem
+// Copyright:   (c) Julian Smart
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
@@ -17,7 +17,7 @@
 // headers
 // ----------------------------------------------------------------------------
 
-#ifdef __GNUG__
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
     #pragma implementation "dcprint.h"
 #endif
 
     #include "wx/string.h"
     #include "wx/log.h"
     #include "wx/window.h"
+    #include "wx/dcmemory.h"
 #endif
 
+#if wxUSE_PRINTING_ARCHITECTURE
+
 #include "wx/msw/private.h"
-#include "wx/dcprint.h"
-#include "math.h"
 
-#if wxUSE_COMMON_DIALOGS || defined(__WXWINE__)
-    #include <commdlg.h>
+#if wxUSE_WXDIB
+#include "wx/msw/dib.h"
 #endif
 
+#include "wx/dcprint.h"
+#include "wx/printdlg.h"
+#include "wx/msw/printdlg.h"
+#include "wx/math.h"
+
+#include "wx/msw/wrapcdlg.h"
 #ifndef __WIN32__
     #include <print.h>
 #endif
 
+// mingw32 defines GDI_ERROR incorrectly
+#if defined(__GNUWIN32__) || !defined(GDI_ERROR)
+    #undef GDI_ERROR
+    #define GDI_ERROR ((int)-1)
+#endif
+
 // ----------------------------------------------------------------------------
 // wxWin macros
 // ----------------------------------------------------------------------------
+
 IMPLEMENT_CLASS(wxPrinterDC, wxDC)
 
 // ============================================================================
@@ -60,105 +74,97 @@ IMPLEMENT_CLASS(wxPrinterDC, wxDC)
 // ----------------------------------------------------------------------------
 
 // This form is deprecated
-wxPrinterDC::wxPrinterDC(const wxString& driver_name, const wxString& device_name, const wxString& file, bool interactive, int orientation)
+wxPrinterDC::wxPrinterDC(const wxString& driver_name,
+                         const wxString& device_name,
+                         const wxString& file,
+                         bool interactive,
+                         int orientation)
 {
     m_isInteractive = interactive;
 
-    if ( !!file )
+    if ( !file.empty() )
         m_printData.SetFilename(file);
 
 #if wxUSE_COMMON_DIALOGS
-    if (interactive)
+    if ( interactive )
     {
         PRINTDLG pd;
 
         pd.lStructSize = sizeof( PRINTDLG );
-        pd.hwndOwner=(HWND) NULL;
-        pd.hDevMode=(HANDLE)NULL;
-        pd.hDevNames=(HANDLE)NULL;
-        pd.Flags=PD_RETURNDC | PD_NOSELECTION | PD_NOPAGENUMS;
-        pd.nFromPage=0;
-        pd.nToPage=0;
-        pd.nMinPage=0;
-        pd.nMaxPage=0;
-        pd.nCopies=1;
-        pd.hInstance=(HINSTANCE)NULL;
-
-        if ( PrintDlg( &pd ) != 0 )
+        pd.hwndOwner = (HWND) NULL;
+        pd.hDevMode = (HANDLE)NULL;
+        pd.hDevNames = (HANDLE)NULL;
+        pd.Flags = PD_RETURNDC | PD_NOSELECTION | PD_NOPAGENUMS;
+        pd.nFromPage = 0;
+        pd.nToPage = 0;
+        pd.nMinPage = 0;
+        pd.nMaxPage = 0;
+        pd.nCopies = 1;
+        pd.hInstance = (HINSTANCE)NULL;
+
+        m_ok = PrintDlg( &pd ) != 0;
+        if ( m_ok )
         {
             m_hDC = (WXHDC) pd.hDC;
-            m_ok = TRUE;
-        }
-        else
-        {
-            m_ok = FALSE;
-            return;
         }
-
-        //     m_dontDelete = TRUE;
     }
     else
 #endif // wxUSE_COMMON_DIALOGS
-        if ((!driver_name.IsNull() && driver_name != wxT("")) &&
-            (!device_name.IsNull() && device_name != wxT("")) &&
-            (!file.IsNull() && file != wxT("")))
+    {
+        if ( !driver_name.empty() && !device_name.empty() && !file.empty() )
         {
-            m_hDC = (WXHDC) CreateDC(WXSTRINGCAST driver_name, WXSTRINGCAST device_name, WXSTRINGCAST file, NULL);
-            m_ok = m_hDC ? TRUE: FALSE;
+            m_hDC = (WXHDC) CreateDC(driver_name, device_name, file, NULL);
         }
-        else
+        else // we don't have all parameters, ask the user
         {
             wxPrintData printData;
             printData.SetOrientation(orientation);
             m_hDC = wxGetPrinterDC(printData);
-            m_ok = m_hDC ? TRUE: FALSE;
         }
 
-        if (m_hDC)
-        {
-            //     int width = GetDeviceCaps(m_hDC, VERTRES);
-            //     int height = GetDeviceCaps(m_hDC, HORZRES);
-            SetMapMode(wxMM_TEXT);
-        }
-        SetBrush(*wxBLACK_BRUSH);
-        SetPen(*wxBLACK_PEN);
+        m_ok = m_hDC ? true: false;
+
+        // as we created it, we must delete it as well
+        m_bOwnsDC = true;
+    }
+
+    Init();
 }
 
 wxPrinterDC::wxPrinterDC(const wxPrintData& printData)
 {
     m_printData = printData;
 
-    m_isInteractive = FALSE;
+    m_isInteractive = false;
 
     m_hDC = wxGetPrinterDC(printData);
-    m_ok = (m_hDC != 0);
-
-    if (m_hDC)
-        SetMapMode(wxMM_TEXT);
+    m_ok = m_hDC != 0;
+    m_bOwnsDC = true;
 
-    SetBrush(*wxBLACK_BRUSH);
-    SetPen(*wxBLACK_PEN);
+    Init();
 }
 
 
-wxPrinterDC::wxPrinterDC(WXHDC theDC)
+wxPrinterDC::wxPrinterDC(WXHDC dc)
 {
-    m_isInteractive = FALSE;
+    m_isInteractive = false;
 
-    m_hDC = theDC;
-    m_ok = TRUE;
-    if (m_hDC)
+    m_hDC = dc;
+    m_bOwnsDC = true;
+    m_ok = true;
+}
+
+void wxPrinterDC::Init()
+{
+    if ( m_hDC )
     {
         //     int width = GetDeviceCaps(m_hDC, VERTRES);
         //     int height = GetDeviceCaps(m_hDC, HORZRES);
         SetMapMode(wxMM_TEXT);
-    }
-    SetBrush(*wxBLACK_BRUSH);
-    SetPen(*wxBLACK_PEN);
-}
 
-wxPrinterDC::~wxPrinterDC()
-{
+        SetBrush(*wxBLACK_BRUSH);
+        SetPen(*wxBLACK_PEN);
+    }
 }
 
 // ----------------------------------------------------------------------------
@@ -173,7 +179,7 @@ bool wxPrinterDC::StartDoc(const wxString& message)
 
     wxString filename(m_printData.GetFilename());
 
-    if (filename.IsEmpty())
+    if (filename.empty())
         docinfo.lpszOutput = NULL;
     else
         docinfo.lpszOutput = (const wxChar *) filename;
@@ -184,17 +190,15 @@ bool wxPrinterDC::StartDoc(const wxString& message)
 #endif
 
     if (!m_hDC)
-        return FALSE;
+        return false;
 
     int ret = ::StartDoc(GetHdc(), &docinfo);
 
-#ifndef __WIN16__
     if (ret <= 0)
     {
         DWORD lastError = GetLastError();
-        wxLogDebug(wxT("wxDC::StartDoc failed with error: %d\n"), lastError);
+        wxLogDebug(wxT("wxDC::StartDoc failed with error: %ld\n"), lastError);
     }
-#endif
 
     return (ret > 0);
 }
@@ -219,19 +223,20 @@ void wxPrinterDC::EndPage()
 // Returns default device and port names
 static bool wxGetDefaultDeviceName(wxString& deviceName, wxString& portName)
 {
-    deviceName = "";
+    deviceName.clear();
 
     LPDEVNAMES  lpDevNames;
-    LPSTR       lpszDriverName;
-    LPSTR       lpszDeviceName;
-    LPSTR       lpszPortName;
+    LPTSTR      lpszDeviceName;
+    LPTSTR      lpszPortName;
 
     PRINTDLG    pd;
 
     // Cygwin has trouble believing PRINTDLG is 66 bytes - thinks it is 68
 #ifdef __GNUWIN32__
+    memset(&pd, 0, 66);
     pd.lStructSize    = 66; // sizeof(PRINTDLG);
 #else
+    memset(&pd, 0, sizeof(PRINTDLG));
     pd.lStructSize    = sizeof(PRINTDLG);
 #endif
 
@@ -248,15 +253,14 @@ static bool wxGetDefaultDeviceName(wxString& deviceName, wxString& portName)
         if (pd.hDevNames)
             GlobalFree(pd.hDevNames);
 
-        return FALSE;
+        return false;
     }
 
     if (pd.hDevNames)
     {
         lpDevNames = (LPDEVNAMES)GlobalLock(pd.hDevNames);
-        lpszDriverName = (LPSTR)lpDevNames + lpDevNames->wDriverOffset;
-        lpszDeviceName = (LPSTR)lpDevNames + lpDevNames->wDeviceOffset;
-        lpszPortName   = (LPSTR)lpDevNames + lpDevNames->wOutputOffset;
+        lpszDeviceName = (LPTSTR)lpDevNames + lpDevNames->wDeviceOffset;
+        lpszPortName   = (LPTSTR)lpDevNames + lpDevNames->wOutputOffset;
 
         deviceName = lpszDeviceName;
         portName = lpszPortName;
@@ -271,95 +275,32 @@ static bool wxGetDefaultDeviceName(wxString& deviceName, wxString& portName)
         GlobalFree(pd.hDevMode);
         pd.hDevMode=NULL;
     }
-    return ( deviceName != wxT("") );
+    return ( !deviceName.empty() );
 }
 
-#if 0
-// This uses defaults, except for orientation, so we should eliminate this function
-// and use the 2nd form (passing wxPrintData) instead.
-WXHDC wxGetPrinterDC(int orientation)
+// Gets an HDC for the specified printer configuration
+WXHDC WXDLLEXPORT wxGetPrinterDC(const wxPrintData& printDataConst)
 {
-    HDC         hDC;
-    LPDEVMODE   lpDevMode = NULL;
-    LPDEVNAMES  lpDevNames;
-    LPSTR       lpszDriverName;
-    LPSTR       lpszDeviceName;
-    LPSTR       lpszPortName;
-
-    PRINTDLG    pd;
-    // __GNUWIN32__ has trouble believing PRINTDLG is 66 bytes - thinks it is 68
-#ifdef __GNUWIN32__
-    pd.lStructSize    = 66; // sizeof(PRINTDLG);
-#else
-    pd.lStructSize    = sizeof(PRINTDLG);
-#endif
-    pd.hwndOwner      = (HWND)NULL;
-    pd.hDevMode       = NULL; // Will be created by PrintDlg
-    pd.hDevNames      = NULL; // Ditto
-    pd.Flags          = PD_RETURNDEFAULT;
-    pd.nCopies        = 1;
-
-    if (!PrintDlg((LPPRINTDLG)&pd))
-    {
-        if ( pd.hDevMode )
-            GlobalFree(pd.hDevMode);
-        if (pd.hDevNames)
-            GlobalFree(pd.hDevNames);
-
-        return(0);
-    }
-
-    if (!pd.hDevNames)
-    {
-        if ( pd.hDevMode )
-            GlobalFree(pd.hDevMode);
-    }
-
-    lpDevNames = (LPDEVNAMES)GlobalLock(pd.hDevNames);
-    lpszDriverName = (LPSTR)lpDevNames + lpDevNames->wDriverOffset;
-    lpszDeviceName = (LPSTR)lpDevNames + lpDevNames->wDeviceOffset;
-    lpszPortName   = (LPSTR)lpDevNames + lpDevNames->wOutputOffset;
-    GlobalUnlock(pd.hDevNames);
-
-    if ( pd.hDevMode )
-    {
-        lpDevMode = (DEVMODE*) GlobalLock(pd.hDevMode);
-        lpDevMode->dmOrientation = orientation;
-        lpDevMode->dmFields |= DM_ORIENTATION;
-    }
+#if defined(__WXUNIVERSAL__) && (!defined(__WXMSW__) || wxUSE_POSTSCRIPT_ARCHITECTURE_IN_MSW)
 
-#ifdef __WIN32__
-    hDC = CreateDC(lpszDriverName, lpszDeviceName, lpszPortName, (DEVMODE *)lpDevMode);
+#if 0
+    wxPostScriptPrintNativeData *data =
+        (wxPostScriptPrintNativeData *) printDataConst.GetNativeData();
+    // FIXME: how further ???
 #else
-    hDC = CreateDC(lpszDriverName, lpszDeviceName, lpszPortName, (LPSTR)lpDevMode);
+    return 0;
 #endif
 
-    if (pd.hDevMode && lpDevMode)
-        GlobalUnlock(pd.hDevMode);
+#else // Postscript vs. native Windows
 
-    if (pd.hDevNames)
-    {
-        GlobalFree(pd.hDevNames);
-        pd.hDevNames=NULL;
-    }
-    if (pd.hDevMode)
-    {
-        GlobalFree(pd.hDevMode);
-        pd.hDevMode=NULL;
-    }
-    return (WXHDC) hDC;
-}
-#endif
+    wxWindowsPrintNativeData *data =
+        (wxWindowsPrintNativeData *) printDataConst.GetNativeData();
 
-// Gets an HDC for the specified printer configuration
-WXHDC WXDLLEXPORT wxGetPrinterDC(const wxPrintData& printDataConst)
-{
-    wxPrintData printData = printDataConst;
-    printData.ConvertToNative();
+    data->TransferFrom( printDataConst );
 
     wxChar* driverName = (wxChar*) NULL;
 
-    wxString devNameStr = printData.GetPrinterName();
+    wxString devNameStr = printDataConst.GetPrinterName();
     wxChar* portName = (wxChar*) NULL; // Obsolete in WIN32
 
     const wxChar* deviceName;
@@ -370,7 +311,7 @@ WXHDC WXDLLEXPORT wxGetPrinterDC(const wxPrintData& printDataConst)
 
     LPDEVMODE lpDevMode = (LPDEVMODE) NULL;
 
-    HGLOBAL hDevMode = (HGLOBAL)(DWORD) printData.GetNativeData();
+    HGLOBAL hDevMode = (HGLOBAL)(DWORD) data->GetDevMode();
 
     if ( hDevMode )
         lpDevMode = (DEVMODE*) GlobalLock(hDevMode);
@@ -379,15 +320,10 @@ WXHDC WXDLLEXPORT wxGetPrinterDC(const wxPrintData& printDataConst)
     {
         // Retrieve the default device name
         wxString portName;
-#ifdef  __WXDEBUG__
-        bool ret =
-#else   // !Debug
-        (void)
-#endif // Debug/Release
-        wxGetDefaultDeviceName(devNameStr, portName);
-
-        wxASSERT_MSG( ret, wxT("Could not get default device name.") );
-
+        if ( !wxGetDefaultDeviceName(devNameStr, portName) )
+        {
+            return 0; // Could not get default device name
+        }
         deviceName = devNameStr.c_str();
     }
 
@@ -401,57 +337,71 @@ WXHDC WXDLLEXPORT wxGetPrinterDC(const wxPrintData& printDataConst)
         GlobalUnlock(hDevMode);
 
     return (WXHDC) hDC;
+#endif
 }
 
 // ----------------------------------------------------------------------------
 // wxPrinterDC bit blitting/bitmap drawing
 // ----------------------------------------------------------------------------
 
-void wxPrinterDC::DoDrawBitmap(const wxBitmap &bmp,
-                               wxCoord x, wxCoord y,
-                               bool useMask)
+// helper of DoDrawBitmap() and DoBlit()
+static
+bool DrawBitmapUsingStretchDIBits(HDC hdc,
+                                  const wxBitmap& bmp,
+                                  wxCoord x, wxCoord y)
 {
-    wxCHECK_RET( bmp.Ok(), _T("invalid bitmap in wxPrinterDC::DrawBitmap") );
+#if wxUSE_WXDIB
+    wxDIB dib(bmp);
+    bool ok = dib.IsOk();
+    if ( !ok )
+        return false;
+
+    DIBSECTION ds;
+    if ( !::GetObject(dib.GetHandle(), sizeof(ds), &ds) )
+    {
+        wxLogLastError(_T("GetObject(DIBSECTION)"));
 
-    int width = bmp.GetWidth(),
-        height = bmp.GetHeight();
+        return false;
+    }
 
-    if ( ::GetDeviceCaps(GetHdc(), RASTERCAPS) & RC_STRETCHDIB )
+    // ok, we've got all data we need, do blit it
+    if ( ::StretchDIBits
+            (
+                hdc,
+                x, y,
+                ds.dsBmih.biWidth, ds.dsBmih.biHeight,
+                0, 0,
+                ds.dsBmih.biWidth, ds.dsBmih.biHeight,
+                ds.dsBm.bmBits,
+                (LPBITMAPINFO)&ds.dsBmih,
+                DIB_RGB_COLORS,
+                SRCCOPY
+            ) == GDI_ERROR )
     {
-        BITMAPINFO *info = (BITMAPINFO *) malloc( sizeof( BITMAPINFOHEADER ) + 256 * sizeof(RGBQUAD ) );
-        memset( info, 0, sizeof( BITMAPINFOHEADER ) );
+        wxLogLastError(wxT("StretchDIBits"));
 
-        int iBitsSize = ((width + 3 ) & ~3 ) * height;
+        return false;
+    }
 
-        void* bits = malloc( iBitsSize );
+    return true;
+#else
+    return false;
+#endif
+}
 
-        info->bmiHeader.biSize = sizeof( BITMAPINFOHEADER );
-        info->bmiHeader.biWidth = width;
-        info->bmiHeader.biHeight = height;
-        info->bmiHeader.biPlanes = 1;
-        info->bmiHeader.biBitCount = 8;
-        info->bmiHeader.biCompression = BI_RGB;
+void wxPrinterDC::DoDrawBitmap(const wxBitmap& bmp,
+                               wxCoord x, wxCoord y,
+                               bool useMask)
+{
+    wxCHECK_RET( bmp.Ok(), _T("invalid bitmap in wxPrinterDC::DrawBitmap") );
 
-        ScreenHDC display;
-        if ( GetDIBits(display, GetHbitmapOf(bmp), 0,
-                       bmp.GetHeight(), bits, info,
-                       DIB_RGB_COLORS) )
-        {
-            if ( ::StretchDIBits(GetHdc(), x, y,
-                                 width, height,
-                                 0 , 0, width, height,
-                                 bits, info,
-                                 DIB_RGB_COLORS, SRCCOPY) == GDI_ERROR )
-            {
-                wxLogLastError("StretchDIBits");
-            }
-        }
+    int width = bmp.GetWidth(),
+        height = bmp.GetHeight();
 
-        free(bits);
-        free(info);
-    }
-    else // no support for StretchDIBits()
+    if ( !(::GetDeviceCaps(GetHdc(), RASTERCAPS) & RC_STRETCHDIB) ||
+            !DrawBitmapUsingStretchDIBits(GetHdc(), bmp, x, y) )
     {
+        // no support for StretchDIBits() or an error occured if we got here
         wxMemoryDC memDC;
         memDC.SelectObject(bmp);
 
@@ -464,108 +414,62 @@ void wxPrinterDC::DoDrawBitmap(const wxBitmap &bmp,
 bool wxPrinterDC::DoBlit(wxCoord xdest, wxCoord ydest,
                          wxCoord width, wxCoord height,
                          wxDC *source,
-                         wxCoord xsrc, wxCoord ysrc,
-                         int rop, bool useMask)
+                         wxCoord WXUNUSED(xsrc), wxCoord WXUNUSED(ysrc),
+                         int WXUNUSED(rop), bool useMask,
+                         wxCoord WXUNUSED(xsrcMask), wxCoord WXUNUSED(ysrcMask))
 {
-    bool success = TRUE;
-
-    if ( useMask )
+    wxBitmap& bmp = source->GetSelectedBitmap();
+    wxMask *mask = useMask ? bmp.GetMask() : NULL;
+    if ( mask )
     {
-        // If we are printing source colours are screen colours
-        // not printer colours and so we need copy the bitmap
-        // pixel by pixel.
+        // If we are printing source colours are screen colours not printer
+        // colours and so we need copy the bitmap pixel by pixel.
         RECT rect;
-        HDC dc_src = GetHdcOf(*source);
-        HDC dc_mask = ::CreateCompatibleDC(dc_src);
+        HDC dcSrc = GetHdcOf(*source);
+        MemoryHDC dcMask(dcSrc);
+        SelectInHDC selectMask(dcMask, (HBITMAP)mask->GetMaskBitmap());
 
-        ::SelectObject(dc_mask, (HBITMAP) source->GetSelectedBitmap().GetMask()->GetMaskBitmap());
         for (int x = 0; x < width; x++)
         {
             for (int y = 0; y < height; y++)
             {
-                COLORREF cref = ::GetPixel(dc_mask, x, y);
+                COLORREF cref = ::GetPixel(dcMask, x, y);
                 if (cref)
                 {
-                    HBRUSH brush = ::CreateSolidBrush(::GetPixel(dc_src, x, y));
+                    HBRUSH brush = ::CreateSolidBrush(::GetPixel(dcSrc, x, y));
                     rect.left = xdest + x;
                     rect.right = rect.left + 1;
-                    rect.top = ydest + y; 
+                    rect.top = ydest + y;
                     rect.bottom = rect.top + 1;
                     ::FillRect(GetHdc(), &rect, brush);
                     ::DeleteObject(brush);
                 }
             }
         }
-        ::SelectObject(dc_mask, 0);
-        ::DeleteDC(dc_mask);
     }
     else // no mask
     {
-        if ( ::GetDeviceCaps(GetHdc(), RASTERCAPS) & RC_STRETCHDIB )
+        if ( !(::GetDeviceCaps(GetHdc(), RASTERCAPS) & RC_STRETCHDIB) ||
+                !DrawBitmapUsingStretchDIBits(GetHdc(), bmp, xdest, ydest) )
         {
-            wxBitmap& bmp = source->GetSelectedBitmap();
-            int width = bmp.GetWidth(),
-                height = bmp.GetHeight();
-
-            BITMAPINFO *info = (BITMAPINFO *) malloc( sizeof( BITMAPINFOHEADER ) + 256 * sizeof(RGBQUAD ) );
-            int iBitsSize = ((width + 3 ) & ~3 ) * height;
+            // no support for StretchDIBits
 
-            void* bits = malloc( iBitsSize );
-
-            memset( info , 0 , sizeof( BITMAPINFOHEADER ) );
-
-            info->bmiHeader.biSize = sizeof( BITMAPINFOHEADER );
-            info->bmiHeader.biWidth = width;
-            info->bmiHeader.biHeight = height;
-            info->bmiHeader.biPlanes = 1;
-            info->bmiHeader.biBitCount = 8;
-            info->bmiHeader.biCompression = BI_RGB;
-
-            ScreenHDC display;
-            if ( !::GetDIBits(display, GetHbitmapOf(bmp), 0,
-                              height, bits, info, DIB_RGB_COLORS) )
-            {
-                wxLogLastError("GetDIBits");
-
-                success = FALSE;
-            }
-
-            if ( success )
-            {
-                success = ::StretchDIBits(GetHdc(), xdest, ydest,
-                                          width, height,
-                                          xsrc, ysrc,
-                                          width, height,
-                                          bits, info ,
-                                          DIB_RGB_COLORS,
-                                          SRCCOPY) != GDI_ERROR;
-                if ( !success )
-                {
-                    wxLogLastError("StretchDIBits");
-                }
-            }
-
-            free(bits);
-            free(info);
-        }
-        else // no support for StretchDIBits
-        {
-            // as we are printing, source colours are screen colours not printer
-            // colours and so we need copy the bitmap pixel by pixel.
-            HDC dc_src = GetHdcOf(*source);
+            // as we are printing, source colours are screen colours not
+            // printer colours and so we need copy the bitmap pixel by pixel.
+            HDC dcSrc = GetHdcOf(*source);
             RECT rect;
             for (int y = 0; y < height; y++)
             {
-                // This is Stefan Csomor's optimisation, where identical adjacent
-                // pixels are drawn together.
+                // optimization: draw identical adjacent pixels together.
                 for (int x = 0; x < width; x++)
                 {
-                    COLORREF col = ::GetPixel(dc_src, x, y);
+                    COLORREF col = ::GetPixel(dcSrc, x, y);
                     HBRUSH brush = ::CreateSolidBrush( col );
 
                     rect.left = xdest + x;
                     rect.top = ydest + y;
-                    while( (x + 1 < width) && (::GetPixel(dc_src, x + 1, y) == col ) )
+                    while( (x + 1 < width) &&
+                                (::GetPixel(dcSrc, x + 1, y) == col ) )
                     {
                         ++x;
                     }
@@ -578,5 +482,8 @@ bool wxPrinterDC::DoBlit(wxCoord xdest, wxCoord ydest,
         }
     }
 
-    return success;
+    return true;
 }
+
+#endif
+    // wxUSE_PRINTING_ARCHITECTURE