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Tidied some doc references; added Stefan's Blit optimisation

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@5140 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Julian Smart
1999-12-29 14:21:38 +00:00
parent 29b5bcd515
commit e12be2f7fb
7 changed files with 81 additions and 85 deletions
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46
src/msw/dc.cpp
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@@ -1230,17 +1230,6 @@ bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height,
else
#endif
{
// Old code
#if 0
HDC dc_mask = CreateCompatibleDC((HDC) source->m_hDC);
::SelectObject(dc_mask, (HBITMAP) source->m_selectedBitmap.GetMask()->GetMaskBitmap());
success = (BitBlt(GetHdc(), xdest1, ydest1, (int)width, (int)height,
dc_mask, xsrc1, ysrc1, 0x00220326 /* NOTSRCAND */) != 0);
success = (BitBlt(GetHdc(), xdest1, ydest1, (int)width, (int)height,
(HDC) source->m_hDC, xsrc1, ysrc1, SRCPAINT) != 0);
::SelectObject(dc_mask, 0);
::DeleteDC(dc_mask);
#endif
// New code from Chris Breeze, 15/7/98
// Blit bitmap with mask
@@ -1318,11 +1307,37 @@ bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height,
}
else
{
// If we are printing, source colours are screen colours
// not printer colours and so we need copy the bitmap
// pixel by pixel.
if (IsKindOf(CLASSINFO(wxPrinterDC)))
{
// If we are printing, source colours are screen colours
// not printer colours and so we need copy the bitmap
// pixel by pixel.
HDC dc_src = (HDC) source->m_hDC;
RECT rect;
for (int y = 0; y < height; y++)
{
// This is Stefan Csomor's optimisation, where
// identical adjacent pixels are drawn together.
// We still need a faster way of drawing bitmaps,
// perhaps converting to a DIB first and using SetDIBitsToDevice.
for (int x = 0; x < width; x++)
{
COLORREF col = ::GetPixel(dc_src, x, y) ;
HBRUSH brush = ::CreateSolidBrush( col );
rect.left = xdest1 + x;
rect.top = ydest1 + y;
while( (x + 1 < width) && (::GetPixel(dc_src, x + 1, y) == col ) )
{
++x ;
}
rect.right = xdest1 + x + 1;
rect.bottom = rect.top + 1;
::FillRect((HDC) m_hDC, &rect, brush);
::DeleteObject(brush);
}
}
/*
HDC dc_src = (HDC) source->m_hDC;
RECT rect;
for (int x = 0; x < width; x++)
@@ -1336,7 +1351,8 @@ bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height,
::DeleteObject(brush);
}
}
}
*/
}
else
{
success = (BitBlt(GetHdc(), xdest1, ydest1, (int)width, (int)height, (HDC) source->m_hDC,