thread_local_context operator()()
{
d3d11::idevicecontext_ptr device_context;
dx::throw_if_failed<d3d11::create_deferred_context_exception> ( m_device->CreateDeferredContext(0, dx::get_pointer(device_context)));
thread_local_context result =
{
m_device,
device_context
};
return std::move(result);
}
bool D11State::init() {
HRESULT hr;
ID3D11Texture2D* pBackBuffer = NULL;
hr = pSwapChain->GetBuffer(0, __uuidof(*pBackBuffer), (LPVOID*)&pBackBuffer);
if (FAILED(hr)) {
ods("D3D11: pSwapChain->GetBuffer failure!");
return false;
}
hr = pDevice->CreateDeferredContext(0, &pDeviceContext);
// Depending on the device settings a deferred context may not be createable
// for example if it is a SINGLETHREADED device.
// (See http://msdn.microsoft.com/en-us/library/windows/desktop/ff476505%28v=vs.85%29.aspx)
// We handle the expected failure and failure fallback in the same way -
// by trying to use an immediate context.
if (FAILED(hr) || !pDeviceContext) {
ods("D3D11: Failed to create DeferredContext (0x%x). Getting ImmediateContext", hr);
pDevice->GetImmediateContext(&pDeviceContext);
D11CreateStateBlock(pDeviceContext, &pOrigStateBlock);
D11CreateStateBlock(pDeviceContext, &pMyStateBlock);
pOrigStateBlock->Capture();
bDeferredContext = false;
} else {
bDeferredContext = true;
}
D3D11_TEXTURE2D_DESC backBufferSurfaceDesc;
pBackBuffer->GetDesc(&backBufferSurfaceDesc);
ZeroMemory(&vp, sizeof(vp));
vp.Width = static_cast<float>(backBufferSurfaceDesc.Width);
vp.Height = static_cast<float>(backBufferSurfaceDesc.Height);
vp.MinDepth = 0;
vp.MaxDepth = 1;
vp.TopLeftX = 0;
vp.TopLeftY = 0;
pDeviceContext->RSSetViewports(1, &vp);
hr = pDevice->CreateRenderTargetView(pBackBuffer, NULL, &pRTV);
if (FAILED(hr)) {
ods("D3D11: pDevice->CreateRenderTargetView failed!");
return false;
}
pDeviceContext->OMSetRenderTargets(1, &pRTV, NULL);
// Settings for an "over" operation.
// https://en.wikipedia.org/w/index.php?title=Alpha_compositing&oldid=580659153#Description
D3D11_BLEND_DESC blend;
ZeroMemory(&blend, sizeof(blend));
blend.RenderTarget[0].BlendEnable = TRUE;
blend.RenderTarget[0].SrcBlend = D3D11_BLEND_ONE;
blend.RenderTarget[0].DestBlend = D3D11_BLEND_INV_SRC_ALPHA;
blend.RenderTarget[0].BlendOp = D3D11_BLEND_OP_ADD;
blend.RenderTarget[0].SrcBlendAlpha = D3D11_BLEND_ONE;
blend.RenderTarget[0].DestBlendAlpha = D3D11_BLEND_INV_SRC_ALPHA;
blend.RenderTarget[0].BlendOpAlpha = D3D11_BLEND_OP_ADD;
blend.RenderTarget[0].RenderTargetWriteMask = D3D11_COLOR_WRITE_ENABLE_ALL;
pDevice->CreateBlendState(&blend, &pBlendState);
if (FAILED(hr)) {
ods("D3D11: pDevice->CreateBlendState failed!");
return false;
}
pDeviceContext->OMSetBlendState(pBlendState, NULL, 0xffffffff);
hr = pDevice->CreateVertexShader(g_vertex_shader, sizeof(g_vertex_shader), NULL, &pVertexShader);
if (FAILED(hr)) {
ods("D3D11: Failed to create vertex shader.");
return false;
}
hr = pDevice->CreatePixelShader(g_pixel_shader, sizeof(g_pixel_shader), NULL, &pPixelShader);
if (FAILED(hr)) {
ods("D3D11: Failed to create pixel shader.");
return false;
}
pTexture = NULL;
pSRView = NULL;
// Define the input layout
D3D11_INPUT_ELEMENT_DESC layout[] = {
{ "POSITION", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, 0, D3D11_INPUT_PER_VERTEX_DATA, 0 },
{ "TEXCOORD", 0, DXGI_FORMAT_R32G32_FLOAT, 0, 12, D3D11_INPUT_PER_VERTEX_DATA, 0 },
};
hr = pDevice->CreateInputLayout(layout, ARRAY_NUM_ELEMENTS(layout), g_vertex_shader, sizeof(g_vertex_shader), &pVertexLayout);
if (FAILED(hr)) {
ods("D3D11: pDevice->CreateInputLayout failure!");
return false;
}
pDeviceContext->IASetInputLayout(pVertexLayout);
D3D11_BUFFER_DESC bd;
ZeroMemory(&bd, sizeof(bd));
bd.Usage = D3D11_USAGE_DYNAMIC;
bd.ByteWidth = VERTEXBUFFER_SIZE;
bd.BindFlags = D3D11_BIND_VERTEX_BUFFER;
bd.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
bd.MiscFlags = 0;
hr = pDevice->CreateBuffer(&bd, NULL, &pVertexBuffer);
if (FAILED(hr)) {
ods("D3D11: pDevice->CreateBuffer failure!");
return false;
}
DWORD indices[] = {
0,1,3,
1,2,3,
};
ZeroMemory(&bd, sizeof(bd));
bd.Usage = D3D11_USAGE_IMMUTABLE;
bd.ByteWidth = sizeof(DWORD) * 6;
bd.BindFlags = D3D11_BIND_INDEX_BUFFER;
bd.CPUAccessFlags = 0;
bd.MiscFlags = 0;
D3D11_SUBRESOURCE_DATA InitData;
ZeroMemory(&InitData, sizeof(InitData));
InitData.pSysMem = indices;
hr = pDevice->CreateBuffer(&bd, &InitData, &pIndexBuffer);
if (FAILED(hr)) {
ods("D3D11: pDevice->CreateBuffer failure!");
return false;
}
// Set index buffer
pDeviceContext->IASetIndexBuffer(pIndexBuffer, DXGI_FORMAT_R32_UINT, 0);
// Set primitive topology
pDeviceContext->IASetPrimitiveTopology(D3D11_PRIMITIVE_TOPOLOGY_TRIANGLELIST);
if (!bDeferredContext) {
pMyStateBlock->Capture();
pOrigStateBlock->Apply();
}
pBackBuffer->Release();
return true;
}
