void Draw()
{
mFrameCount++;
int cmdIndex = mFrameCount % MaxFrameLatency;
auto* cmdQueue = mCmdQueue.Get();
auto* cmdList = mCmdList.Get();
// Wait untill next queue be freed
if (mFrameCount > MaxFrameLatency)
{
mFence->SetEventOnCompletion(mFrameCount - MaxFrameLatency, mFenceEveneHandle);
DWORD wait = WaitForSingleObject(mFenceEveneHandle, 10000);
if (wait != WAIT_OBJECT_0)
throw runtime_error("Failed WaitForSingleObject().");
CHK(mCmdAlloc[cmdIndex]->Reset());
}
CHK(cmdList->Reset(mCmdAlloc[cmdIndex].Get(), nullptr));
// Upload constant buffer
{
static float rot = 0.0f;
rot += 1.0f;
if (rot >= 360.0f) rot = 0.0f;
XMMATRIX worldMat, viewMat, projMat;
worldMat = XMMatrixRotationY(XMConvertToRadians(rot));
viewMat = XMMatrixLookAtLH({ 0, 1, -1.5f }, { 0, 0.5f, 0 }, { 0, 1, 0 });
projMat = XMMatrixPerspectiveFovLH(45, (float)mBufferWidth / mBufferHeight, 0.01f, 50.0f);
auto mvpMat = XMMatrixTranspose(worldMat * viewMat * projMat);
auto worldTransMat = XMMatrixTranspose(worldMat);
// mCBUploadPtr is Write-Combine memory
// Shift offset to guarantee that the pointer has not referred by executing command list.
char* ptr = reinterpret_cast<char*>(mCBUploadPtr) + CB_SIZE * cmdIndex;
memcpy_s(ptr, 64, &mvpMat, 64);
memcpy_s(ptr + 64, 64, &worldTransMat, 64);
}
// Get current RTV descriptor
auto descHandleRtvStep = mDev->GetDescriptorHandleIncrementSize(D3D12_DESCRIPTOR_HEAP_TYPE_RTV);
D3D12_CPU_DESCRIPTOR_HANDLE descHandleRtv = mDescHeapRtv->GetCPUDescriptorHandleForHeapStart();
descHandleRtv.ptr += ((mFrameCount - 1) % BUFFER_COUNT) * descHandleRtvStep;
// Get current swap chain
ID3D12Resource* d3dBuffer = mD3DBuffer[(mFrameCount - 1) % BUFFER_COUNT].Get();
// Get DSV
auto descHandleDsv = mDescHeapDsv->GetCPUDescriptorHandleForHeapStart();
// Barrier Present -> RenderTarget
setResourceBarrier(mCmdList.Get(), d3dBuffer, D3D12_RESOURCE_STATE_PRESENT, D3D12_RESOURCE_STATE_RENDER_TARGET);
// Viewport & Scissor
D3D12_VIEWPORT viewport = {};
viewport.Width = (float)mBufferWidth;
viewport.Height = (float)mBufferHeight;
viewport.MinDepth = 0.0f;
viewport.MaxDepth = 1.0f;
cmdList->RSSetViewports(1, &viewport);
D3D12_RECT scissor = {};
scissor.right = (LONG)mBufferWidth;
scissor.bottom = (LONG)mBufferHeight;
cmdList->RSSetScissorRects(1, &scissor);
// Clear DepthTexture
mCmdList->ClearDepthStencilView(descHandleDsv, D3D12_CLEAR_FLAG_DEPTH, 1.0f, 0, 0, nullptr);
// Clear
{
float clearColor[4] = { 0.1f, 0.2f, 0.3f, 1.0f };
mCmdList->ClearRenderTargetView(descHandleRtv, clearColor, 0, nullptr);
}
mCmdList->OMSetRenderTargets(1, &descHandleRtv, true, &descHandleDsv);
// Draw
cmdList->SetGraphicsRootSignature(mRootSignature.Get());
ID3D12DescriptorHeap* descHeaps[] = { mDescHeapCbvSrvUav[cmdIndex].Get() };
cmdList->SetDescriptorHeaps(ARRAYSIZE(descHeaps), descHeaps);
{
cmdList->SetGraphicsRootDescriptorTable(0, mDescHeapCbvSrvUav[cmdIndex]->GetGPUDescriptorHandleForHeapStart());
cmdList->SetPipelineState(mPso.Get());
cmdList->IASetPrimitiveTopology(D3D_PRIMITIVE_TOPOLOGY_TRIANGLELIST);
cmdList->IASetVertexBuffers(0, 1, &mVBView);
cmdList->IASetIndexBuffer(&mIBView);
cmdList->DrawIndexedInstanced(mIndexCount, 1, 0, 0, 0);
}
// Barrier RenderTarget -> Present
//setResourceBarrier(mCmdList.Get(), d3dBuffer, D3D12_RESOURCE_STATE_RENDER_TARGET, D3D12_RESOURCE_STATE_PRESENT);
// Exec
CHK(cmdList->Close());
ID3D12CommandList* const cmdLists = cmdList;
//cmdQueue->ExecuteCommandLists(1, &cmdLists);
CHK(cmdQueue->Signal(mFence.Get(), mFrameCount));
// Acquire RTV for D3D11
ID3D11Resource* backBuffer11 = mBackBuffer11Tex[(mFrameCount - 1) % BUFFER_COUNT].Get();
mDev11on12->AcquireWrappedResources(&backBuffer11, 1);
// Draw
auto* rtv11 = mBackBuffer11Rtv[(mFrameCount - 1) % BUFFER_COUNT].Get();
float color11[4] = {0.4f, 0.2f, 0.1f, 1.0f};
mDevCont11->ClearRenderTargetView(rtv11, color11);
// Release RTV for D3D11
mDev11on12->ReleaseWrappedResources(&backBuffer11, 1);
// Present
CHK(mSwapChain->Present(1, 0));
}