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blit implemented using dc.GetAsBitmap with subrect

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@42613 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Stefan Csomor
2006-10-29 11:07:11 +00:00
parent d888a332db
commit 64c8307c93
1 changed files with 5 additions and 53 deletions
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58
src/common/dcgraph.cpp
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@@ -714,59 +714,11 @@ bool wxGCDC::DoBlit(
ysrcMask = ysrc;
}
wxCoord yysrc = source-> LogicalToDeviceY(ysrc);
wxCoord xxsrc = source-> LogicalToDeviceX(xsrc);
wxCoord wwsrc = source-> LogicalToDeviceXRel(width);
wxCoord hhsrc = source-> LogicalToDeviceYRel(height);
wxBitmap blit;
wxMemoryDC* memdc = wxDynamicCast(source,wxMemoryDC);
if ( memdc )
{
blit = memdc->GetSelectedBitmap();
wxASSERT_MSG( blit.Ok() , wxT("Invalid bitmap for blitting") );
wxCoord bmpwidth = blit.GetWidth();
wxCoord bmpheight = blit.GetHeight();
if ( xxsrc != 0 || yysrc != 0 || bmpwidth != wwsrc || bmpheight != hhsrc )
{
wwsrc = wxMin( wwsrc , bmpwidth - xxsrc );
hhsrc = wxMin( hhsrc , bmpheight - yysrc );
if ( wwsrc > 0 && hhsrc > 0 )
{
if ( xxsrc >= 0 && yysrc >= 0 )
{
wxRect subrect( xxsrc, yysrc, wwsrc , hhsrc );
// TODO we perhaps could add a DrawSubBitmap call to dc for performance reasons
blit = blit.GetSubBitmap( subrect );
}
else
{
// in this case we'd probably have to adjust the different coordinates, but
// we have to find out proper contract first
blit = wxNullBitmap;
}
}
else
{
blit = wxNullBitmap;
}
}
}
else
{
wxWindowDC* windc = wxDynamicCast(source,wxWindowDC);
if (windc)
{
wxBitmap bmp;
bmp = windc->GetAsBitmap();
if (bmp.IsOk())
blit = bmp.GetSubBitmap( wxRect(xsrc, ysrc, width, height ) );
}
}
wxRect subrect(source-> LogicalToDeviceX(xsrc),source-> LogicalToDeviceY(ysrc),
source-> LogicalToDeviceXRel(width),source-> LogicalToDeviceYRel(height));
wxBitmap blit = source->GetAsBitmap( &subrect );
if ( blit.Ok() )
{
m_graphicContext->DrawBitmap( blit, xdest , ydest , width , height );