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sped up the mask creation by a factor of 40

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@13166 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin 2001-12-23 01:56:08 +00:00
parent 25faedaa98
commit 51ddb341ee
1 changed files with 14 additions and 0 deletions
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14
src/msw/bitmap.cpp
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@ -1292,6 +1292,11 @@ bool wxMask::Create(const wxBitmap& bitmap, const wxColour& colour)
ok = FALSE;
}
// VZ: I'm leaving the old code in for now in case it is needed under Win95
// or any other broken Windows versions but it is horribly inefficient:
// creating 100 masks for 80x80 bitmaps takes 7.8 seconds on my machine
// but only 0.2 using the new code!
#if 0
// this is not very efficient, but I can't think of a better way of doing
// it
for ( int w = 0; ok && (w < width); w++ )
@ -1319,6 +1324,15 @@ bool wxMask::Create(const wxBitmap& bitmap, const wxColour& colour)
}
}
}
#else
HBRUSH hbrMask = ::CreateSolidBrush(maskColour);
HGDIOBJ hbrOld = ::SelectObject(destDC, hbrMask);
// the ternary raster operation 0x3C004A is dest := src ^ brush
::BitBlt(destDC, 0, 0, width, height, srcDC, 0, 0, 0x3C004A);
::SelectObject(destDC, hbrOld);
#endif
::SelectObject(srcDC, hbmpSrcOld);
::DeleteDC(srcDC);