X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/b3c861501a451503b31c075ccb59d16b0ae01e99..387c7b3eefde23a62e20465000dd96d58fc63bcd:/src/dfb/dcclient.cpp diff --git a/src/dfb/dcclient.cpp b/src/dfb/dcclient.cpp index 257d73b45b..6514a4f599 100644 --- a/src/dfb/dcclient.cpp +++ b/src/dfb/dcclient.cpp @@ -27,14 +27,71 @@ #ifndef WX_PRECOMP #include "wx/window.h" + #include "wx/nonownedwnd.h" #endif #include "wx/dfb/private.h" +#define TRACE_PAINT "paint" + // =========================================================================== // 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)); + + // normal windows cannot extend out of its parent's client area: + if ( !win->CanBeOutsideClientArea() ) + rp.Intersect(parent->GetClientRect()); + + 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, "%p ('%s'): creating dummy DC surface", + win, win->GetName().c_str()); + wxSize size(rect ? rect->GetSize() : win->GetSize()); + + // we can't create a surface of 0 size but the size of the window may be 0, + // so ensure that we have at least a single pixel to draw on + size.IncTo(wxSize(1, 1)); + + return win->GetDfbSurface()->CreateCompatible + ( + size, + wxIDirectFBSurface::CreateCompatible_NoBackBuffer + ); +} + //----------------------------------------------------------------------------- // wxWindowDC //----------------------------------------------------------------------------- @@ -42,39 +99,131 @@ IMPLEMENT_DYNAMIC_CLASS(wxWindowDC, wxDC) wxWindowDC::wxWindowDC(wxWindow *win) - : wxDC(win ? win->GetDfbSurface() : NULL) { - InitForWin(win); + InitForWin(win, NULL); } -void wxWindowDC::InitForWin(wxWindow *win) +void wxWindowDC::InitForWin(wxWindow *win, const wxRect *rect) { - wxCHECK_RET( win, _T("invalid window") ); + wxCHECK_RET( win, "invalid window" ); + + m_win = win; + + // obtain the surface used for painting: + wxPoint origin; + wxIDirectFBSurfacePtr surface; + + wxRect rectOrig(rect ? *rect : wxRect(win->GetSize())); + wxRect r; + + if ( !win->IsShownOnScreen() ) + { + // leave 'r' rectangle empty to indicate the window is not visible, + // see below (below "create the surface:") for how is this case handled + } + else + { + // compute painting rectangle after clipping if we're in PaintWindow + // code, otherwise paint on the entire window: + r = rectOrig; + + const wxRegion& updateRegion = win->GetUpdateRegion(); + if ( win->GetTLW()->IsPainting() && !updateRegion.IsEmpty() ) + { + r.Intersect(updateRegion.AsRect()); + wxCHECK_RET( !r.IsEmpty(), "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 + } + } + + // 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 + { + m_winRect = r; + 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 + // rect.GetPosition() has coordinates (0,0) in the DC: + origin.x = rectOrig.x - r.x; + origin.y = rectOrig.y - r.y; + + // m_shouldFlip was set in the "if" block above this one + } + + if ( !surface ) + return; + wxLogTrace(TRACE_PAINT, + "%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); + + DFBInit(surface); SetFont(win->GetFont()); -} -//----------------------------------------------------------------------------- -// base class for wxClientDC and wxPaintDC -//----------------------------------------------------------------------------- + // offset coordinates to account for subsurface's origin coordinates: + SetDeviceOrigin(origin.x, origin.y); +} -wxClientDCBase::wxClientDCBase(wxWindow *win) +wxWindowDC::~wxWindowDC() { - wxCHECK_RET( win, _T("invalid window") ); - - wxRect rect = win->GetClientRect(); - DFBRectangle dfbrect = { rect.x, rect.y, rect.width, rect.height }; - - IDirectFBSurfacePtr winsurf(win->GetDfbSurface()); - IDirectFBSurfacePtr subsurf; - if ( !DFB_CALL( winsurf->GetSubSurface(winsurf, &dfbrect, &subsurf) ) ) + wxIDirectFBSurfacePtr surface(GetDirectFBSurface()); + if ( !surface ) return; - Init(subsurf); - InitForWin(win); + // if no painting was done on the DC, we don't have to flip the surface: + if ( !m_isBBoxValid ) + return; - // offset coordinates to account for subsurface's origin coordinates: - SetDeviceOrigin(rect.x, rect.y); + if ( m_shouldFlip ) + { + // paint overlays on top of the surface being drawn to by this DC + // before showing anything on the screen: + m_win->PaintOverlays(m_winRect); + + 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 } //----------------------------------------------------------------------------- @@ -83,12 +232,12 @@ wxClientDCBase::wxClientDCBase(wxWindow *win) IMPLEMENT_DYNAMIC_CLASS(wxClientDC, wxWindowDC) -wxClientDC::~wxClientDC() +wxClientDC::wxClientDC(wxWindow *win) { - // flip to surface so that the changes become visible - IDirectFBSurfacePtr surface(GetDirectFBSurface()); - if ( surface ) - surface->Flip(surface, NULL, DSFLIP_NONE); + wxCHECK_RET( win, "invalid window" ); + + wxRect rect = win->GetClientRect(); + InitForWin(win, &rect); } //----------------------------------------------------------------------------- @@ -96,12 +245,3 @@ wxClientDC::~wxClientDC() //----------------------------------------------------------------------------- IMPLEMENT_DYNAMIC_CLASS(wxPaintDC, wxWindowDC) - -#warning "wxPaintDC ctor must respect m_updateRegion" - -wxPaintDC::~wxPaintDC() -{ - // NB: do *not* flip the surface: wxPaintDC is used with EVT_PAINT and the - // surface will be flipped for the entire TLW once all children are - // repainted -}