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don't allocate backbuffer for dummy surfaces

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@41426 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Václav Slavík
2006-09-25 08:01:36 +00:00
parent 93259e592b
commit 7e2baeb413
3 changed files with 38 additions and 7 deletions
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14
src/dfb/wrapdfb.cpp
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@@ -116,7 +116,8 @@ int wxIDirectFBSurface::GetDepth()
return DFB_BITS_PER_PIXEL(format);
}
wxIDirectFBSurfacePtr wxIDirectFBSurface::CreateCompatible(const wxSize& sz)
wxIDirectFBSurfacePtr
wxIDirectFBSurface::CreateCompatible(const wxSize& sz, int flags)
{
wxSize size(sz);
if ( size == wxDefaultSize )
@@ -135,6 +136,17 @@ wxIDirectFBSurfacePtr wxIDirectFBSurface::CreateCompatible(const wxSize& sz)
desc.width = size.x;
desc.height = size.y;
// filter out caps that don't make sense for a new compatible surface:
int caps = desc.caps;
caps &= ~DSCAPS_PRIMARY;
caps &= ~DSCAPS_SUBSURFACE;
if ( flags & CreateCompatible_NoBackBuffer )
{
caps &= ~DSCAPS_DOUBLE;
caps &= ~DSCAPS_TRIPLE;
}
desc.caps = (DFBSurfaceCapabilities)caps;
wxIDirectFBSurfacePtr snew(wxIDirectFB::Get()->CreateSurface(&desc));
if ( !snew )
return NULL;