void CWinSystemX11GL::SetVSyncImpl(bool enable)
{
/* turn of current setting first */
if(m_glXSwapIntervalSGI)
m_glXSwapIntervalSGI(0);
if(m_glXSwapIntervalMESA)
m_glXSwapIntervalMESA(0);
m_iVSyncErrors = 0;
CStdString strVendor(m_RenderVendor);
strVendor.ToLower();
if(!enable)
return;
bool vendor_nvidia = strVendor.find("nvidia") != std::string::npos;
bool vendor_ati = strVendor.compare(0, 3, "ati") == 0;
if (m_glXSwapIntervalMESA && !m_iVSyncMode && vendor_ati)
{
if(m_glXSwapIntervalMESA(1) == 0)
m_iVSyncMode = 2;
else
CLog::Log(LOGWARNING, "%s - glXSwapIntervalMESA failed", __FUNCTION__);
}
if(m_glXGetSyncValuesOML && m_glXSwapBuffersMscOML && !m_iVSyncMode)
{
int64_t ust, msc, sbc;
if(m_glXGetSyncValuesOML(m_dpy, m_glWindow, &ust, &msc, &sbc))
m_iVSyncMode = 5;
else
CLog::Log(LOGWARNING, "%s - glXGetSyncValuesOML failed", __FUNCTION__);
}
if (m_glXWaitVideoSyncSGI && m_glXGetVideoSyncSGI && !m_iVSyncMode && !vendor_nvidia)
{
unsigned int count;
if(m_glXGetVideoSyncSGI(&count) == 0)
m_iVSyncMode = 3;
else
CLog::Log(LOGWARNING, "%s - glXGetVideoSyncSGI failed, glcontext probably not direct", __FUNCTION__);
}
if (m_glXSwapIntervalSGI && !m_iVSyncMode)
{
if(m_glXSwapIntervalSGI(1) == 0)
m_iVSyncMode = 2;
else
CLog::Log(LOGWARNING, "%s - glXSwapIntervalSGI failed", __FUNCTION__);
}
if (m_glXSwapIntervalMESA && !m_iVSyncMode && !vendor_ati)
{
if(m_glXSwapIntervalMESA(1) == 0)
m_iVSyncMode = 2;
else
CLog::Log(LOGWARNING, "%s - glXSwapIntervalMESA failed", __FUNCTION__);
}
}
bool CWinSystemX11GL::PresentRenderImpl(const CDirtyRegionList& dirty)
{
CheckDisplayEvents();
if(m_iVSyncMode == 3)
{
glFinish();
unsigned int before = 0, after = 0;
if(m_glXGetVideoSyncSGI(&before) != 0)
CLog::Log(LOGERROR, "%s - glXGetVideoSyncSGI - Failed to get current retrace count", __FUNCTION__);
glXSwapBuffers(m_dpy, m_glWindow);
glFinish();
if(m_glXGetVideoSyncSGI(&after) != 0)
CLog::Log(LOGERROR, "%s - glXGetVideoSyncSGI - Failed to get current retrace count", __FUNCTION__);
if(after == before)
m_iVSyncErrors = 1;
else
m_iVSyncErrors--;
if(m_iVSyncErrors > 0)
{
CLog::Log(LOGINFO, "GL: retrace count didn't change after buffer swap, switching to vsync mode 4");
m_iVSyncErrors = 0;
m_iVSyncMode = 4;
}
if(m_iVSyncErrors < -200)
{
CLog::Log(LOGINFO, "GL: retrace count change for %d consecutive buffer swap, switching to vsync mode 2", -m_iVSyncErrors);
m_iVSyncErrors = 0;
m_iVSyncMode = 2;
}
}
else if (m_iVSyncMode == 4)
{
glFinish();
unsigned int before = 0, swap = 0, after = 0;
if(m_glXGetVideoSyncSGI(&before) != 0)
CLog::Log(LOGERROR, "%s - glXGetVideoSyncSGI - Failed to get current retrace count", __FUNCTION__);
if(m_glXWaitVideoSyncSGI(2, (before+1)%2, &swap) != 0)
CLog::Log(LOGERROR, "%s - glXWaitVideoSyncSGI - Returned error", __FUNCTION__);
glXSwapBuffers(m_dpy, m_glWindow);
glFinish();
if(m_glXGetVideoSyncSGI(&after) != 0)
CLog::Log(LOGERROR, "%s - glXGetVideoSyncSGI - Failed to get current retrace count", __FUNCTION__);
if(after == before)
CLog::Log(LOGERROR, "%s - glXWaitVideoSyncSGI - Woke up early", __FUNCTION__);
if(after > before + 1)
m_iVSyncErrors++;
else
m_iVSyncErrors = 0;
if(m_iVSyncErrors > 30)
{
CLog::Log(LOGINFO, "GL: retrace count seems to be changing due to the swapbuffers call, switching to vsync mode 3");
m_iVSyncMode = 3;
m_iVSyncErrors = 0;
}
}
else if (m_iVSyncMode == 5)
{
int64_t ust, msc, sbc;
if(m_glXGetSyncValuesOML(m_dpy, m_glWindow, &ust, &msc, &sbc))
m_glXSwapBuffersMscOML(m_dpy, m_glWindow, msc, 0, 0);
else
CLog::Log(LOGERROR, "%s - glXSwapBuffersMscOML - Failed to get current retrace count", __FUNCTION__);
}
else
glXSwapBuffers(m_dpy, m_glWindow);
return true;
}
