// implementation
// ===========================================================================
+//-----------------------------------------------------------------------------
+// helpers
+//-----------------------------------------------------------------------------
+
+// Returns subrect of the window that is not outside of its parent's
+// boundaries ("hidden behind its borders"), recursively:
+static wxRect GetUncoveredWindowArea(wxWindow *win)
+{
+ wxRect r(win->GetSize());
+
+ if ( win->IsTopLevel() )
+ return r;
+
+ wxWindow *parent = win->GetParent();
+ if ( !parent )
+ return r;
+
+ // intersect with parent's uncovered area, after offsetting it into win's
+ // coordinates; this will remove parts of 'r' that are outside of the
+ // parent's area:
+ wxRect rp(GetUncoveredWindowArea(parent));
+ rp.Offset(-win->GetPosition());
+ rp.Offset(-parent->GetClientAreaOrigin());
+ r.Intersect(rp);
+
+ return r;
+}
+
+// creates a dummy surface that has the same format as the real window's
+// surface, but is not visible and so can be painted on even if the window
+// is hidden
+static
+wxIDirectFBSurfacePtr CreateDummySurface(wxWindow *win, const wxRect *rect)
+{
+ wxLogTrace(TRACE_PAINT, _T("%p ('%s'): creating dummy DC surface"),
+ win, win->GetName().c_str());
+ wxSize size(rect ? rect->GetSize() : win->GetSize());
+ return win->GetDfbSurface()->CreateCompatible
+ (
+ size,
+ wxIDirectFBSurface::CreateCompatible_NoBackBuffer
+ );
+}
+
//-----------------------------------------------------------------------------
// wxWindowDC
//-----------------------------------------------------------------------------
void wxWindowDC::InitForWin(wxWindow *win, const wxRect *rect)
{
- m_win = win;
-
wxCHECK_RET( win, _T("invalid window") );
// obtain the surface used for painting:
wxPoint origin;
wxIDirectFBSurfacePtr surface;
- if ( !win->IsVisible() )
+ wxRect rectOrig(rect ? *rect : wxRect(win->GetSize()));
+ wxRect r;
+
+ if ( !win->IsShownOnScreen() )
{
- // we're painting on invisible window: the changes won't have any
- // effect, as the window will be repainted anyhow when it is shown, but
- // we still need a valid DC so that e.g. text extents can be measured,
- // so let's create a dummy surface that has the same format as the real
- // one would have and let the code paint on it:
- wxLogTrace(TRACE_PAINT, _T("%p ('%s'): creating dummy DC surface"),
- win, win->GetName().c_str());
- wxSize size(rect ? rect->GetSize() : win->GetSize());
- surface = win->GetDfbSurface()->CreateCompatible(size);
+ // leave 'r' rectangle empty to indicate the window is not visible,
+ // see below (below "create the surface:") for how is this case handled
}
else
{
- wxRect rectOrig(rect ? *rect : wxRect(win->GetSize()));
-
// compute painting rectangle after clipping if we're in PaintWindow
// code, otherwise paint on the entire window:
- wxRect r(rectOrig);
- if ( win->GetTLW()->IsPainting() )
- r.Intersect(win->GetUpdateRegion().AsRect());
+ r = rectOrig;
+
+ const wxRegion& updateRegion = win->GetUpdateRegion();
+ if ( win->GetTLW()->IsPainting() && !updateRegion.IsEmpty() )
+ {
+ r.Intersect(updateRegion.AsRect());
+ wxCHECK_RET( !r.IsEmpty(), _T("invalid painting rectangle") );
+
+ // parent TLW will flip the entire surface when painting is done
+ m_shouldFlip = false;
+ }
+ else
+ {
+ // One of two things happened:
+ // (1) the TLW is not being painted by PaintWindow() now; or
+ // (2) we're drawing on some window other than the one that is
+ // currently painted on by PaintWindow()
+ // In either case, we need to flip the surface when we're done
+ // painting and we don't have to use updateRegion for clipping.
+ // OTOH, if the window is (partially) hidden by being
+ // out of its parent's area, we must clip the surface accordingly.
+ r.Intersect(GetUncoveredWindowArea(win));
+ m_shouldFlip = true; // paint the results immediately
+ }
+ }
- wxCHECK_RET( !r.IsEmpty(), _T("invalid painting rectangle") );
+ // create the surface:
+ if ( r.IsEmpty() )
+ {
+ // we're painting on invisible window: the changes won't have any
+ // effect, as the window will be repainted anyhow when it is shown,
+ // but we still need a valid DC so that e.g. text extents can be
+ // measured, so let's create a dummy surface that has the same
+ // format as the real one would have and let the code paint on it:
+ surface = CreateDummySurface(win, rect);
+
+ // painting on hidden window has no effect on TLW's surface, don't
+ // waste time flipping the dummy surface:
+ m_shouldFlip = false;
+ }
+ else
+ {
+ DFBRectangle dfbrect = { r.x, r.y, r.width, r.height };
+ surface = win->GetDfbSurface()->GetSubSurface(&dfbrect);
- // if the DC was clipped thanks to rectPaint, we must adjust the origin
- // accordingly; but we do *not* adjust for 'rect', because
+ // if the DC was clipped thanks to rectPaint, we must adjust the
+ // origin accordingly; but we do *not* adjust for 'rect', because
// rect.GetPosition() has coordinates (0,0) in the DC:
origin.x = rectOrig.x - r.x;
origin.y = rectOrig.y - r.y;
- wxLogTrace(TRACE_PAINT,
- _T("%p ('%s'): creating DC for area [%i,%i,%i,%i], clipped to [%i,%i,%i,%i], origin [%i,%i]"),
- win, win->GetName().c_str(),
- rectOrig.x, rectOrig.y, rectOrig.GetRight(), rectOrig.GetBottom(),
- r.x, r.y, r.GetRight(), r.GetBottom(),
- origin.x, origin.y);
-
- DFBRectangle dfbrect = { r.x, r.y, r.width, r.height };
- surface = win->GetDfbSurface()->GetSubSurface(&dfbrect);
+ // m_shouldFlip was set in the "if" block above this one
}
if ( !surface )
return;
+ wxLogTrace(TRACE_PAINT,
+ _T("%p ('%s'): creating DC for area [%i,%i,%i,%i], clipped to [%i,%i,%i,%i], origin [%i,%i]"),
+ win, win->GetName().c_str(),
+ rectOrig.x, rectOrig.y, rectOrig.GetRight(), rectOrig.GetBottom(),
+ r.x, r.y, r.GetRight(), r.GetBottom(),
+ origin.x, origin.y);
+
Init(surface);
SetFont(win->GetFont());
wxWindowDC::~wxWindowDC()
{
wxIDirectFBSurfacePtr surface(GetDirectFBSurface());
- if ( !surface || !m_win )
- return;
-
- // painting on hidden window has no effect on TLW's surface, don't
- // waste time flipping the dummy surface:
- if ( !m_win->IsVisible() )
+ if ( !surface )
return;
// if no painting was done on the DC, we don't have to flip the surface:
if ( !m_isBBoxValid )
return;
- if ( !m_win->GetTLW()->IsPainting() )
+ if ( m_shouldFlip )
{
- // FIXME: flip only modified parts of the surface
- surface->FlipToFront();
+ DFBSurfaceCapabilities caps = DSCAPS_NONE;
+ surface->GetCapabilities(&caps);
+ if ( caps & DSCAPS_DOUBLE )
+ {
+ // FIXME: flip only modified parts of the surface
+ surface->FlipToFront();
+ }
+ // else: the surface is not double-buffered and so cannot be flipped
}
// else: don't flip the surface, wxTLW will do it when it finishes
// painting of its invalidated areas
projects / wxWidgets.git / blobdiff