From f178ab7e82544871ae3e59341c1953d5ce088365 Mon Sep 17 00:00:00 2001
From: Vadim Zeitlin <vadim@wxwidgets.org>
Date: Thu, 2 Jan 2003 23:25:17 +0000
Subject: [PATCH] use StretchBlt() if available (part of patch 649866)
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@18523 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
---
src/msw/dc.cpp | 71 ++++++++++++++++++++++++++++++++++++++++++++------
1 file changed, 63 insertions(+), 8 deletions(-)
diff --git a/src/msw/dc.cpp b/src/msw/dc.cpp
index 3bb029de5e..79b1b5e14f 100644
--- a/src/msw/dc.cpp
+++ b/src/msw/dc.cpp
@@ -132,6 +132,30 @@ private:
bool m_changed;
};
+// this class saves the old stretch blit mode during its life time
+class StretchBltModeChanger
+{
+public:
+ StretchBltModeChanger(HDC hdc, int mode)
+ : m_hdc(hdc)
+ {
+ m_modeOld = ::SetStretchBltMode(m_hdc, mode);
+ if ( !m_modeOld )
+ wxLogLastError(_T("SetStretchBltMode"));
+ }
+
+ ~StretchBltModeChanger()
+ {
+ if ( !::SetStretchBltMode(m_hdc, m_modeOld) )
+ wxLogLastError(_T("SetStretchBltMode"));
+ }
+
+private:
+ const HDC m_hdc;
+
+ int m_modeOld;
+};
+
// ===========================================================================
// implementation
// ===========================================================================
@@ -1808,10 +1832,16 @@ bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest,
if (wxSystemOptions::GetOptionInt(wxT("no-maskblt")) == 0)
#endif
{
- success = ::MaskBlt(GetHdc(), xdest, ydest, width, height,
- GetHdcOf(*source), xsrc, ysrc,
- (HBITMAP)mask->GetMaskBitmap(), xsrcMask, ysrcMask,
- MAKEROP4(dwRop, DSTCOPY)) != 0;
+ success = ::MaskBlt
+ (
+ GetHdc(),
+ xdest, ydest, width, height,
+ GetHdcOf(*source),
+ xsrc, ysrc,
+ (HBITMAP)mask->GetMaskBitmap(),
+ xsrcMask, ysrcMask,
+ MAKEROP4(dwRop, DSTCOPY)
+ ) != 0;
}
if ( !success )
@@ -1901,14 +1931,39 @@ bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest,
}
else // no mask, just BitBlt() it
{
- success = ::BitBlt(GetHdc(), xdest, ydest,
- (int)width, (int)height,
- GetHdcOf(*source), xsrc, ysrc, dwRop) != 0;
+ // use StretchBlt() if available
+ if ( ::GetDeviceCaps(GetHdc(), RASTERCAPS) & RC_STRETCHBLT )
+ {
+ StretchBltModeChanger changeMode(GetHdc(), COLORONCOLOR);
+
+ success = ::StretchBlt
+ (
+ GetHdc(),
+ xdest, ydest, width, height,
+ GetHdcOf(*source),
+ xsrc, ysrc, width, height,
+ dwRop
+ ) != 0;
+ }
+ else
+ {
+ success = ::BitBlt
+ (
+ GetHdc(),
+ xdest, ydest,
+ (int)width, (int)height,
+ GetHdcOf(*source),
+ xsrc, ysrc,
+ dwRop
+ ) != 0;
+ }
+
if ( !success )
{
- wxLogLastError(wxT("BitBlt"));
+ wxLogLastError(wxT("BitBlt/StretchBlt"));
}
}
+
::SetTextColor(GetHdc(), old_textground);
::SetBkColor(GetHdc(), old_background);
--
2.47.2