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we need make_current() in the flip after all

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This commit is contained in:
David Rose 2004-03-02 18:21:23 +00:00
parent 6f956e1fe7
commit f709ae9232
1 changed files with 15 additions and 6 deletions
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21
panda/src/wgldisplay/wglGraphicsWindow.cxx
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@ -160,13 +160,16 @@ make_current() {
wglGraphicsStateGuardian *wglgsg; wglGraphicsStateGuardian *wglgsg;
DCAST_INTO_V(wglgsg, _gsg); DCAST_INTO_V(wglgsg, _gsg);
wglMakeCurrent(_hdc, wglgsg->get_context(_hdc)); HGLRC context = wglgsg->get_context(_hdc);
if (context) {
wglMakeCurrent(_hdc, context);
// Now that we have made the context current to a window, we can // Now that we have made the context current to a window, we can
// reset the GSG state if this is the first time it has been used. // reset the GSG state if this is the first time it has been used.
// (We can't just call reset() when we construct the GSG, because // (We can't just call reset() when we construct the GSG, because
// reset() requires having a current context.) // reset() requires having a current context.)
wglgsg->reset_if_new(); wglgsg->reset_if_new();
}
} }
//////////////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////////////
@ -201,6 +204,12 @@ release_gsg() {
void wglGraphicsWindow:: void wglGraphicsWindow::
begin_flip() { begin_flip() {
if (_hdc) { if (_hdc) {
// It turns out that if we don't call make_current() before
// calling SwapBuffers() on a Matrix card, we crash a horrible
// death. This is a pity since make_current() seems unnecessary
// on other cards, and does incur some performance overhead.
make_current();
SwapBuffers(_hdc); SwapBuffers(_hdc);
} }
} }