QVistaHelper::VistaState QVistaHelper::vistaState()
{
if (cachedVistaState == Dirty)
cachedVistaState =
isCompositionEnabled() ? VistaAero : isThemeActive() ? VistaBasic : Classic;
return cachedVistaState;
}
static void swapBuffers(_GLFWwindow* window)
{
// HACK: Use DwmFlush when desktop composition is enabled
if (isCompositionEnabled() && !window->monitor)
{
int count = abs(window->context.wgl.interval);
while (count--)
_glfw_DwmFlush();
}
SwapBuffers(window->context.wgl.dc);
}
static void swapInterval(int interval)
{
_GLFWwindow* window = _glfwPlatformGetCurrentContext();
window->context.wgl.interval = interval;
// HACK: Disable WGL swap interval when desktop composition is enabled to
// avoid interfering with DWM vsync
if (isCompositionEnabled() && !window->monitor)
interval = 0;
if (_glfw.wgl.EXT_swap_control)
_glfw.wgl.SwapIntervalEXT(interval);
}