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Try a slightly different Xdbe implementation that copies instead of swaps.

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git-svn-id: file:///fltk/svn/fltk/branches/branch-1.1@5679 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
This commit is contained in:
Michael R Sweet 2007-02-08 20:50:01 +00:00
parent e173e7bec0
commit 3d11948876
1 changed files with 17 additions and 16 deletions
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33
src/Fl_Double_Window.cxx
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@ -338,9 +338,11 @@ void Fl_Double_Window::flush(int eraseoverlay) {
Fl_X *myi = Fl_X::i(this);
if (!myi->other_xid) {
#if USE_XDBE
if (can_xdbe()) myi->other_xid =
XdbeAllocateBackBufferName(fl_display, fl_xid(this), XdbeUndefined);
else
if (can_xdbe()) {
myi->other_xid =
XdbeAllocateBackBufferName(fl_display, fl_xid(this), XdbeCopied);
myi->backbuffer_bad = 1;
} else
#endif
#ifdef __APPLE_QD__
if ( ( !QDIsPortBuffered( GetWindowPort(myi->xid) ) )
@ -360,28 +362,27 @@ void Fl_Double_Window::flush(int eraseoverlay) {
}
#if USE_XDBE
if (use_xdbe) {
// if this is true, copy rather than swap so back buffer is preserved:
int copy = (myi->region || eraseoverlay);
if (myi->backbuffer_bad) { // make sure we do a complete redraw...
if (myi->backbuffer_bad) {
// Make sure we do a complete redraw...
if (myi->region) {XDestroyRegion(myi->region); myi->region = 0;}
clear_damage(FL_DAMAGE_ALL);
myi->backbuffer_bad = 0;
}
// Redraw as needed...
if (damage()) {
fl_clip_region(myi->region); myi->region = 0;
fl_window = myi->other_xid;
draw();
fl_window = myi->xid;
}
if (!copy) {
XdbeSwapInfo s;
s.swap_window = fl_xid(this);
s.swap_action = XdbeUndefined;
XdbeSwapBuffers(fl_display, &s, 1);
myi->backbuffer_bad = 1;
return;
}
// otherwise just use normal copy from back to front:
myi->backbuffer_bad = 0; // which won't destroy the back buffer...
// Copy contents of back buffer to window...
XdbeSwapInfo s;
s.swap_window = fl_xid(this);
s.swap_action = XdbeCopied;
XdbeSwapBuffers(fl_display, &s, 1);
return;
} else
#endif
if (damage() & ~FL_DAMAGE_EXPOSE) {