void SwapChain::resizeBuffers()
{
// Is there a valid swap chain?
if (nullptr != mDxgiSwapChain)
{
Direct3D11Renderer& direct3D11Renderer = static_cast<Direct3D11Renderer&>(getRenderer());
// Get the currently set render target
Renderer::IRenderTarget *renderTargetBackup = direct3D11Renderer.omGetRenderTarget();
// In case this swap chain is the current render target, we have to unset it before continuing
if (this == renderTargetBackup)
{
direct3D11Renderer.omSetRenderTarget(nullptr);
}
else
{
renderTargetBackup = nullptr;
}
// Release the views
if (nullptr != mD3D11DepthStencilView)
{
mD3D11DepthStencilView->Release();
mD3D11DepthStencilView = nullptr;
}
if (nullptr != mD3D11RenderTargetView)
{
mD3D11RenderTargetView->Release();
mD3D11RenderTargetView = nullptr;
}
// Get the swap chain width and height, ensures they are never ever zero
UINT width = 1;
UINT height = 1;
getSafeWidthAndHeight(width, height);
// Resize the Direct3D 11 swap chain
// -> Preserve the existing buffer count and format
if (SUCCEEDED(mDxgiSwapChain->ResizeBuffers(0, width, height, DXGI_FORMAT_UNKNOWN, 0)))
{
// Create the Direct3D 11 views
createDirect3D11Views();
// If required, restore the previously set render target
if (nullptr != renderTargetBackup)
{
direct3D11Renderer.omSetRenderTarget(renderTargetBackup);
}
}
}
}
/**
* @brief
* Create the Direct3D 11 views
*/
void SwapChain::createDirect3D11Views()
{
// Create a render target view
ID3D11Texture2D *d3d11Texture2DBackBuffer = nullptr;
HRESULT hResult = mDxgiSwapChain->GetBuffer(0, __uuidof(ID3D11Texture2D), reinterpret_cast<LPVOID*>(&d3d11Texture2DBackBuffer));
if (SUCCEEDED(hResult))
{
// Get the Direct3D 11 device instance
ID3D11Device *d3d11Device = static_cast<Direct3D11Renderer&>(getRenderer()).getD3D11Device();
// Create a render target view
hResult = d3d11Device->CreateRenderTargetView(d3d11Texture2DBackBuffer, nullptr, &mD3D11RenderTargetView);
d3d11Texture2DBackBuffer->Release();
if (SUCCEEDED(hResult))
{
// Get the swap chain width and height, ensures they are never ever zero
UINT width = 1;
UINT height = 1;
getSafeWidthAndHeight(width, height);
// Create depth stencil texture
ID3D11Texture2D *d3d11Texture2DDepthStencil = nullptr;
D3D11_TEXTURE2D_DESC d3d11Texture2DDesc;
::ZeroMemory(&d3d11Texture2DDesc, sizeof(d3d11Texture2DDesc));
d3d11Texture2DDesc.Width = width;
d3d11Texture2DDesc.Height = height;
d3d11Texture2DDesc.MipLevels = 1;
d3d11Texture2DDesc.ArraySize = 1;
d3d11Texture2DDesc.Format = DXGI_FORMAT_D24_UNORM_S8_UINT;
d3d11Texture2DDesc.SampleDesc.Count = 1;
d3d11Texture2DDesc.SampleDesc.Quality = 0;
d3d11Texture2DDesc.Usage = D3D11_USAGE_DEFAULT;
d3d11Texture2DDesc.BindFlags = D3D11_BIND_DEPTH_STENCIL;
d3d11Texture2DDesc.CPUAccessFlags = 0;
d3d11Texture2DDesc.MiscFlags = 0;
hResult = d3d11Device->CreateTexture2D(&d3d11Texture2DDesc, nullptr, &d3d11Texture2DDepthStencil);
if (SUCCEEDED(hResult))
{
// Create the depth stencil view
D3D11_DEPTH_STENCIL_VIEW_DESC d3d11DepthStencilViewDesc;
::ZeroMemory(&d3d11DepthStencilViewDesc, sizeof(d3d11DepthStencilViewDesc));
d3d11DepthStencilViewDesc.Format = d3d11Texture2DDesc.Format;
d3d11DepthStencilViewDesc.ViewDimension = D3D11_DSV_DIMENSION_TEXTURE2D;
d3d11DepthStencilViewDesc.Texture2D.MipSlice = 0;
d3d11Device->CreateDepthStencilView(d3d11Texture2DDepthStencil, &d3d11DepthStencilViewDesc, &mD3D11DepthStencilView);
d3d11Texture2DDepthStencil->Release();
}
}
}
}
