int
D3DOverdrawWindow::
Loop(void)
{
int nOverdraw = 0;
IDirect3DQuery9* pOcclusionQuery;
DWORD numberOfPixelsDrawn;
d3d->CreateQuery(D3DQUERYTYPE_OCCLUSION, &pOcclusionQuery);
for (unsigned int iViewpoint = 0; iViewpoint < m_nViewpointCount;
iViewpoint++)
{
// Add an end marker to the command buffer queue.
pOcclusionQuery->Issue(D3DISSUE_BEGIN);
// Draw scene
SetupDraw(iViewpoint);
DrawModel();
d3d->EndScene();
d3d->Present(NULL, NULL, NULL, NULL);
// Add an end marker to the command buffer queue.
pOcclusionQuery->Issue(D3DISSUE_END);
// Force the driver to execute the commands from the command buffer.
// Empty the command buffer and wait until the GPU is idle.
while (S_FALSE == pOcclusionQuery->GetData(&numberOfPixelsDrawn,
sizeof(DWORD), D3DGETDATA_FLUSH))
;
nOverdraw += numberOfPixelsDrawn;
}
pOcclusionQuery->Release();
return nOverdraw;
}
bool Graphics::isQueryResultsAvailable(uint occlusionQuery) {
IDirect3DQuery9* pQuery = queryPool[occlusionQuery];
if (pQuery != nullptr) {
if (S_OK == pQuery->GetData(0, 0, 0)) {
return true;
}
}
return false;
}
void CRenderSystemDX::FlushGPU()
{
IDirect3DQuery9* pEvent = NULL;
m_pD3DDevice->CreateQuery(D3DQUERYTYPE_EVENT, &pEvent);
if (pEvent != NULL)
{
pEvent->Issue(D3DISSUE_END);
while (S_FALSE == pEvent->GetData(NULL, 0, D3DGETDATA_FLUSH))
Sleep(1);
}
}
void Graphics::getQueryResults(uint occlusionQuery, uint* pixelCount) {
IDirect3DQuery9* pQuery = queryPool[occlusionQuery];
if (pQuery != nullptr) {
DWORD numberOfPixelsDrawn;
HRESULT result = pQuery->GetData(&numberOfPixelsDrawn, sizeof(DWORD), 0);
if (S_OK == result) {
*pixelCount = numberOfPixelsDrawn;
}
else {
Kore::log(Kore::LogLevel::Warning, "Check first if results are available");
*pixelCount = 0;
}
}
}
void Display::sync(bool block)
{
HRESULT result;
IDirect3DQuery9* query = allocateEventQuery();
if (!query)
{
return;
}
result = query->Issue(D3DISSUE_END);
ASSERT(SUCCEEDED(result));
do
{
result = query->GetData(NULL, 0, D3DGETDATA_FLUSH);
if(block && result == S_FALSE)
{
// Keep polling, but allow other threads to do something useful first
Sleep(0);
// explicitly check for device loss
// some drivers seem to return S_FALSE even if the device is lost
// instead of D3DERR_DEVICELOST like they should
if (testDeviceLost())
{
result = D3DERR_DEVICELOST;
}
}
}
while(block && result == S_FALSE);
freeEventQuery(query);
if (isDeviceLostError(result))
{
notifyDeviceLost();
}
}