void _Fl_Overlay::flush()
{
fl_window = fl_xid(this);
if (!gc) gc = XCreateGC(fl_display, fl_xid(this), 0, 0);
fl_gc = gc;
fl_overlay = 1;
Fl_Overlay_Window *w = (Fl_Overlay_Window *)parent();
current_ = w;
Fl_X *i = Fl_X::i(this);
if (damage() == FL_DAMAGE_EXPOSE)
{
fl_clip_region(i->region); i->region = 0;
w->draw_overlay();
fl_clip_region(0);
}
else
{
XClearWindow(fl_display, fl_xid(this));
w->draw_overlay();
}
fl_overlay = 0;
}
void Fl_Overlay_Window::flush()
{
#if BOXX_OVERLAY_BUGS
if (overlay_ && overlay_ != this && overlay_->shown())
{
// all drawing to windows hidden by overlay windows is ignored, fix this
XUnmapWindow(fl_display, fl_xid(overlay_));
Fl_Double_Window::flush(0);
XMapWindow(fl_display, fl_xid(overlay_));
return;
}
#endif
bool erase_overlay = (damage()&FL_DAMAGE_OVERLAY) != 0;
set_damage(damage()&~FL_DAMAGE_OVERLAY);
Fl_Double_Window::flush(erase_overlay);
if (overlay_ == this) draw_overlay();
fl_clip_region(0); // turn off any clip it left on
}
void gl_start()
{
if (!context)
{
#ifdef _WIN32
if (!gl_choice) fl_gl_visual(0);
context = fl_create_gl_context(Fl_Window::current(), gl_choice);
#else
context = fl_create_gl_context(fl_visual);
#endif
}
fl_set_gl_context(Fl_Window::current(), context);
#ifndef _WIN32
glXWaitX();
#endif
if (pw != Fl_Window::current()->w() || ph != Fl_Window::current()->h())
{
pw = Fl_Window::current()->w();
ph = Fl_Window::current()->h();
glLoadIdentity();
glViewport(0, 0, pw, ph);
glOrtho(0, pw, 0, ph, -1, 1);
glDrawBuffer(GL_FRONT);
}
// if (clip_state_number != fl_clip_state_number) {
// clip_state_number = fl_clip_state_number;
int x, y, w, h;
if (fl_clip_box(0, 0, Fl_Window::current()->w(), Fl_Window::current()->h(),
x, y, w, h))
{
fl_clip_region(XRectangleRegion(x,y,w,h));
glScissor(x, Fl_Window::current()->h()-(y+h), w, h);
glEnable(GL_SCISSOR_TEST);
}
else
{
glDisable(GL_SCISSOR_TEST);
}
// }
}
FL_EXPORT_C(fl_Region,flc_clip_region)( ){
return (fl_Region)fl_clip_region();
}
FL_EXPORT_C(void,flc_set_clip_region)(fl_Region r){
fl_clip_region((static_cast<Fl_Region>(r)));
}
