X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/d6f2a8911e509fd9e61f881cc881a97f5aa05ae8..eea4d01c65f9b29baa1193db762b4c6b8144af24:/src/msw/printwin.cpp

diff --git a/src/msw/printwin.cpp b/src/msw/printwin.cpp
index 310db919dd..9018f7de70 100644
--- a/src/msw/printwin.cpp
+++ b/src/msw/printwin.cpp
@@ -39,23 +39,26 @@
     #include "wx/intl.h"
     #include "wx/log.h"
     #include "wx/dcprint.h"
+    #include "wx/dcmemory.h"
+    #include "wx/image.h"
 #endif
 
+#include "wx/msw/dib.h"
+#include "wx/msw/dcmemory.h"
 #include "wx/msw/printwin.h"
 #include "wx/msw/printdlg.h"
 #include "wx/msw/private.h"
-
-#include <stdlib.h>
-
-#ifndef __WIN32__
-    #include <print.h>
+#include "wx/msw/dcprint.h"
+#if wxUSE_ENH_METAFILE
+    #include "wx/msw/enhmeta.h"
 #endif
+#include <stdlib.h>
 
 // ---------------------------------------------------------------------------
 // private functions
 // ---------------------------------------------------------------------------
 
-LONG APIENTRY _EXPORT wxAbortProc(HDC hPr, int Code);
+BOOL CALLBACK wxAbortProc(HDC hdc, int error);
 
 // ---------------------------------------------------------------------------
 // wxWin macros
@@ -75,16 +78,6 @@ LONG APIENTRY _EXPORT wxAbortProc(HDC hPr, int Code);
 wxWindowsPrinter::wxWindowsPrinter(wxPrintDialogData *data)
                 : wxPrinterBase(data)
 {
-    m_lpAbortProc = (WXFARPROC)wxAbortProc;
-}
-
-wxWindowsPrinter::~wxWindowsPrinter()
-{
-    // avoids warning about statement with no effect (FreeProcInstance
-    // doesn't do anything under Win32)
-#if !defined(__WIN32__) && !defined(__NT__)
-    FreeProcInstance((FARPROC) m_lpAbortProc);
-#endif
 }
 
 bool wxWindowsPrinter::Print(wxWindow *parent, wxPrintout *printout, bool prompt)
@@ -98,8 +91,6 @@ bool wxWindowsPrinter::Print(wxWindow *parent, wxPrintout *printout, bool prompt
         return false;
     }
 
-    printout->SetIsPreview(false);
-
     if (m_printDialogData.GetMinPage() < 1)
         m_printDialogData.SetMinPage(1);
     if (m_printDialogData.GetMaxPage() < 1)
@@ -119,19 +110,21 @@ bool wxWindowsPrinter::Print(wxWindow *parent, wxPrintout *printout, bool prompt
     }
 
     // May have pressed cancel.
-    if (!dc || !dc->Ok())
+    if (!dc || !dc->IsOk())
     {
         if (dc) delete dc;
         return false;
     }
 
+    wxPrinterDCImpl *impl = (wxPrinterDCImpl*) dc->GetImpl();
+
     HDC hdc = ::GetDC(NULL);
     int logPPIScreenX = ::GetDeviceCaps(hdc, LOGPIXELSX);
     int logPPIScreenY = ::GetDeviceCaps(hdc, LOGPIXELSY);
     ::ReleaseDC(NULL, hdc);
 
-    int logPPIPrinterX = ::GetDeviceCaps((HDC) dc->GetHDC(), LOGPIXELSX);
-    int logPPIPrinterY = ::GetDeviceCaps((HDC) dc->GetHDC(), LOGPIXELSY);
+    int logPPIPrinterX = ::GetDeviceCaps((HDC) impl->GetHDC(), LOGPIXELSX);
+    int logPPIPrinterY = ::GetDeviceCaps((HDC) impl->GetHDC(), LOGPIXELSY);
     if (logPPIPrinterX == 0 || logPPIPrinterY == 0)
     {
         delete dc;
@@ -177,24 +170,7 @@ bool wxWindowsPrinter::Print(wxWindow *parent, wxPrintout *printout, bool prompt
     wxWindow *win = CreateAbortWindow(parent, printout);
     wxYield();
 
-#if defined(__WATCOMC__) || defined(__BORLANDC__) || defined(__GNUWIN32__) || defined(__SALFORDC__) || !defined(__WIN32__)
-#ifdef STRICT
-    ::SetAbortProc((HDC) dc->GetHDC(), (ABORTPROC) m_lpAbortProc);
-#else
-    ::SetAbortProc((HDC) dc->GetHDC(), (FARPROC) m_lpAbortProc);
-#endif
-#else
-    ::SetAbortProc((HDC) dc->GetHDC(), (int (_stdcall *)
-        // cast it to right type only if required
-        // FIXME it's really cdecl and we're casting it to stdcall - either there is
-        //       something I don't understand or it will crash at first usage
-#ifdef STRICT
-        (HDC, int)
-#else
-        ()
-#endif
-        )m_lpAbortProc);
-#endif
+    ::SetAbortProc(GetHdcOf(*impl), wxAbortProc);
 
     if (!win)
     {
@@ -268,8 +244,7 @@ bool wxWindowsPrinter::Print(wxWindow *parent, wxPrintout *printout, bool prompt
     if (sm_abortWindow)
     {
         sm_abortWindow->Show(false);
-        delete sm_abortWindow;
-        sm_abortWindow = NULL;
+        wxDELETE(sm_abortWindow);
     }
 
     delete dc;
@@ -279,7 +254,7 @@ bool wxWindowsPrinter::Print(wxWindow *parent, wxPrintout *printout, bool prompt
 
 wxDC *wxWindowsPrinter::PrintDialog(wxWindow *parent)
 {
-    wxDC *dc = (wxPrinterDC*) NULL;
+    wxDC *dc = NULL;
 
     wxWindowsPrintDialog dialog(parent, & m_printDialogData);
     int ret = dialog.ShowModal();
@@ -370,9 +345,10 @@ void wxWindowsPrintPreview::DetermineScaling()
 
     wxRect paperRect;
 
-    if ( printerDC.Ok() )
+    if ( printerDC.IsOk() )
     {
-        HDC dc = GetHdcOf(printerDC);
+        wxPrinterDCImpl *impl = (wxPrinterDCImpl*) printerDC.GetImpl();
+        HDC dc = GetHdcOf(*impl);
         printerWidthMM = ::GetDeviceCaps(dc, HORZSIZE);
         printerHeightMM = ::GetDeviceCaps(dc, VERTSIZE);
         printerXRes = ::GetDeviceCaps(dc, HORZRES);
@@ -415,15 +391,55 @@ void wxWindowsPrintPreview::DetermineScaling()
     m_previewScaleY = float(logPPIScreenY) / logPPIPrinterY;
 }
 
-/****************************************************************************
+#if wxUSE_ENH_METAFILE
+bool wxWindowsPrintPreview::RenderPageIntoBitmap(wxBitmap& bmp, int pageNum)
+{
+    // The preview, as implemented in wxPrintPreviewBase (and as used prior to
+    // wx3) is inexact: it uses screen DC, which has much lower resolution and
+    // has other properties different from printer DC, so the preview is not
+    // quite right.
+    //
+    // To make matters worse, if the application depends heavily on
+    // GetTextExtent() or does text layout itself, the output in preview and on
+    // paper can be very different. In particular, wxHtmlEasyPrinting is
+    // affected and the preview can be easily off by several pages.
+    //
+    // To fix this, we render the preview into high-resolution enhanced
+    // metafile with properties identical to the printer DC. This guarantees
+    // metrics correctness while still being fast.
+
+
+    // print the preview into a metafile:
+    wxPrinterDC printerDC(m_printDialogData.GetPrintData());
+    wxEnhMetaFileDC metaDC(printerDC,
+                           wxEmptyString,
+                           printerDC.GetSize().x, printerDC.GetSize().y);
 
-  FUNCTION: wxAbortProc()
+    if ( !RenderPageIntoDC(metaDC, pageNum) )
+        return false;
 
-    PURPOSE:  Processes messages for the Abort Dialog box
+    wxEnhMetaFile *metafile = metaDC.Close();
+    if ( !metafile )
+        return false;
 
-****************************************************************************/
+    // now render the metafile:
+    wxMemoryDC bmpDC;
+    bmpDC.SelectObject(bmp);
+    bmpDC.Clear();
+
+    wxRect outRect(0, 0, bmp.GetWidth(), bmp.GetHeight());
+    metafile->Play(&bmpDC, &outRect);
+
+
+    delete metafile;
+
+    // TODO: we should keep the metafile and reuse it when changing zoom level
+
+    return true;
+}
+#endif // wxUSE_ENH_METAFILE
 
-LONG APIENTRY _EXPORT wxAbortProc(HDC WXUNUSED(hPr), int WXUNUSED(Code))
+BOOL CALLBACK wxAbortProc(HDC WXUNUSED(hdc), int WXUNUSED(error))
 {
     MSG msg;