X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/8bf30fe9b0b40d1a6f54608588121212c2c4e037..87df17a11b0017d31c09f767bd921abb27193bee:/src/msw/dc.cpp

diff --git a/src/msw/dc.cpp b/src/msw/dc.cpp
index 86e1a772cf..faa71428b5 100644
--- a/src/msw/dc.cpp
+++ b/src/msw/dc.cpp
@@ -40,6 +40,7 @@
     #include "wx/icon.h"
 #endif
 
+#include "wx/settings.h"
 #include "wx/dcprint.h"
 
 #include <string.h>
@@ -275,12 +276,29 @@ void wxDC::SelectOldObjects(WXHDC dc)
     m_clipY2 = (wxCoord) YDEV2LOG(rect.bottom); \
 }
 
-void wxDC::DoSetClippingRegion(wxCoord cx, wxCoord cy, wxCoord cw, wxCoord ch)
+void wxDC::DoSetClippingRegion(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
 {
     m_clipping = TRUE;
-    IntersectClipRect(GetHdc(), XLOG2DEV(cx), YLOG2DEV(cy),
-                                XLOG2DEV(cx + cw), YLOG2DEV(cy + ch));
-    DO_SET_CLIPPING_BOX()
+
+    // the region coords are always the device ones, so do the translation
+    // manually
+    HRGN hrgn = ::CreateRectRgn(LogicalToDeviceX(x),
+                                LogicalToDeviceY(y),
+                                LogicalToDeviceX(x + w),
+                                LogicalToDeviceY(y + h));
+    if ( !hrgn )
+    {
+        wxLogLastError(_T("CreateRectRgn"));
+    }
+    else
+    {
+        if ( ::SelectClipRgn(GetHdc(), hrgn) == ERROR )
+        {
+            wxLogLastError(_T("SelectClipRgn"));
+        }
+
+        DO_SET_CLIPPING_BOX()
+    }
 }
 
 void wxDC::DoSetClippingRegionAsRegion(const wxRegion& region)
@@ -768,16 +786,23 @@ void wxDC::DoDrawBitmap( const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask
     if ( useMask )
     {
 #ifdef __WIN32__
-        HDC hdcMem = ::CreateCompatibleDC(GetHdc());
-        ::SelectObject(hdcMem, GetHbitmapOf(bmp));
-
         // use MaskBlt() with ROP which doesn't do anything to dst in the mask
         // points
-        bool ok = ::MaskBlt(GetHdc(), x, y, width, height,
+        // On some systems, MaskBlt succeeds yet is much much slower
+        // than the wxWindows fall-back implementation. So we need
+        // to be able to switch this on and off at runtime.
+        bool ok = FALSE;
+        if (wxSystemSettings::GetOptionInt(wxT("no-maskblt")) == 0)
+        {
+            HDC hdcMem = ::CreateCompatibleDC(GetHdc());
+            ::SelectObject(hdcMem, GetHbitmapOf(bmp));
+
+            ok = ::MaskBlt(GetHdc(), x, y, width, height,
                             hdcMem, 0, 0,
                             hbmpMask, 0, 0,
                             MAKEROP4(SRCCOPY, DSTCOPY)) != 0;
-        ::DeleteDC(hdcMem);
+            ::DeleteDC(hdcMem);
+        }
 
         if ( !ok )
 #endif // Win32
@@ -1171,7 +1196,7 @@ void wxDC::SetRop(WXHDC dc)
     SetROP2(GetHdc(), rop);
 }
 
-bool wxDC::StartDoc(const wxString& message)
+bool wxDC::StartDoc(const wxString& WXUNUSED(message))
 {
     // We might be previewing, so return TRUE to let it continue.
     return TRUE;
@@ -1458,7 +1483,7 @@ bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest,
            return FALSE;
     }
 
-    bool success;
+    bool success = FALSE;
 
     if (useMask)
     {
@@ -1467,10 +1492,17 @@ bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest,
         // transparent, so use "DSTCOPY" ROP for the mask points (the usual
         // meaning of fg and bg is inverted which corresponds to wxWin notion
         // of the mask which is also contrary to the Windows one)
-        success = ::MaskBlt(GetHdc(), xdest, ydest, width, height,
+
+        // On some systems, MaskBlt succeeds yet is much much slower
+        // than the wxWindows fall-back implementation. So we need
+        // to be able to switch this on and off at runtime.
+        if (wxSystemSettings::GetOptionInt(wxT("no-maskblt")) == 0)
+        {
+           success = ::MaskBlt(GetHdc(), xdest, ydest, width, height,
                             GetHdcOf(*source), xsrc, ysrc,
                             (HBITMAP)mask->GetMaskBitmap(), xsrc, ysrc,
                             MAKEROP4(dwRop, DSTCOPY)) != 0;
+        }
 
         if ( !success )
 #endif // Win32