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#include "graph.hpp"
#include "application.hpp"
#include "exception.hpp"
namespace cru::graph
{
using Microsoft::WRL::ComPtr;
WindowRenderTarget::WindowRenderTarget(GraphManager* graph_manager, HWND hwnd)
{
this->graph_manager_ = graph_manager;
const auto d3d11_device = graph_manager->GetD3D11Device();
const auto dxgi_factory = graph_manager->GetDxgiFactory();
// Allocate a descriptor.
DXGI_SWAP_CHAIN_DESC1 swap_chain_desc = { 0 };
swap_chain_desc.Width = 0; // use automatic sizing
swap_chain_desc.Height = 0;
swap_chain_desc.Format = DXGI_FORMAT_B8G8R8A8_UNORM; // this is the most common swapchain format
swap_chain_desc.Stereo = false;
swap_chain_desc.SampleDesc.Count = 1; // don't use multi-sampling
swap_chain_desc.SampleDesc.Quality = 0;
swap_chain_desc.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
swap_chain_desc.BufferCount = 2; // use double buffering to enable flip
swap_chain_desc.Scaling = DXGI_SCALING_NONE;
swap_chain_desc.SwapEffect = DXGI_SWAP_EFFECT_FLIP_SEQUENTIAL; // all apps must use this SwapEffect
swap_chain_desc.Flags = 0;
// Get the final swap chain for this window from the DXGI factory.
ThrowIfFailed(
dxgi_factory->CreateSwapChainForHwnd(
d3d11_device.Get(),
hwnd,
&swap_chain_desc,
nullptr,
nullptr,
&dxgi_swap_chain_
)
);
CreateTargetBitmap();
}
WindowRenderTarget::~WindowRenderTarget()
{
}
void WindowRenderTarget::ResizeBuffer(const int width, const int height)
{
const auto graph_manager = graph_manager_;
const auto d2d1_device_context = graph_manager->GetD2D1DeviceContext();
ComPtr<ID2D1Image> old_target;
d2d1_device_context->GetTarget(&old_target);
const auto target_this = old_target == this->target_bitmap_;
if (target_this)
d2d1_device_context->SetTarget(nullptr);
old_target = nullptr;
target_bitmap_ = nullptr;
ThrowIfFailed(
dxgi_swap_chain_->ResizeBuffers(0, width, height, DXGI_FORMAT_UNKNOWN, 0)
);
CreateTargetBitmap();
if (target_this)
d2d1_device_context->SetTarget(target_bitmap_.Get());
}
void WindowRenderTarget::SetAsTarget()
{
GetD2DDeviceContext()->SetTarget(target_bitmap_.Get());
}
void WindowRenderTarget::Present()
{
ThrowIfFailed(
dxgi_swap_chain_->Present(1, 0)
);
}
void WindowRenderTarget::CreateTargetBitmap()
{
// Direct2D needs the dxgi version of the backbuffer surface pointer.
ComPtr<IDXGISurface> dxgiBackBuffer;
ThrowIfFailed(
dxgi_swap_chain_->GetBuffer(0, IID_PPV_ARGS(&dxgiBackBuffer))
);
const auto dpi = graph_manager_->GetDpi();
auto bitmap_properties =
D2D1::BitmapProperties1(
D2D1_BITMAP_OPTIONS_TARGET | D2D1_BITMAP_OPTIONS_CANNOT_DRAW,
D2D1::PixelFormat(DXGI_FORMAT_B8G8R8A8_UNORM, D2D1_ALPHA_MODE_IGNORE),
dpi.x,
dpi.y
);
// Get a D2D surface from the DXGI back buffer to use as the D2D render target.
ThrowIfFailed(
graph_manager_->GetD2D1DeviceContext()->CreateBitmapFromDxgiSurface(
dxgiBackBuffer.Get(),
&bitmap_properties,
&target_bitmap_
)
);
}
GraphManager* GraphManager::GetInstance()
{
return Application::GetInstance()->ResolveSingleton<GraphManager>([](auto)
{
return new GraphManager{};
});
}
GraphManager::GraphManager()
{
UINT creation_flags = D3D11_CREATE_DEVICE_BGRA_SUPPORT;
#ifdef CRU_DEBUG
creation_flags |= D3D11_CREATE_DEVICE_DEBUG;
#endif
const D3D_FEATURE_LEVEL feature_levels[] =
{
D3D_FEATURE_LEVEL_11_1,
D3D_FEATURE_LEVEL_11_0,
D3D_FEATURE_LEVEL_10_1,
D3D_FEATURE_LEVEL_10_0,
D3D_FEATURE_LEVEL_9_3,
D3D_FEATURE_LEVEL_9_2,
D3D_FEATURE_LEVEL_9_1
};
ThrowIfFailed(D3D11CreateDevice(
nullptr,
D3D_DRIVER_TYPE_HARDWARE,
nullptr,
creation_flags,
feature_levels,
ARRAYSIZE(feature_levels),
D3D11_SDK_VERSION,
&d3d11_device_,
nullptr,
&d3d11_device_context_
));
Microsoft::WRL::ComPtr<IDXGIDevice> dxgi_device;
ThrowIfFailed(d3d11_device_.As(&dxgi_device));
ThrowIfFailed(D2D1CreateFactory(
D2D1_FACTORY_TYPE_SINGLE_THREADED,
__uuidof(ID2D1Factory1),
&d2d1_factory_
));
ThrowIfFailed(d2d1_factory_->CreateDevice(dxgi_device.Get(), &d2d1_device_));
ThrowIfFailed(d2d1_device_->CreateDeviceContext(
D2D1_DEVICE_CONTEXT_OPTIONS_NONE,
&d2d1_device_context_
));
// Identify the physical adapter (GPU or card) this device is runs on.
ComPtr<IDXGIAdapter> dxgi_adapter;
ThrowIfFailed(
dxgi_device->GetAdapter(&dxgi_adapter)
);
// Get the factory object that created the DXGI device.
ThrowIfFailed(
dxgi_adapter->GetParent(IID_PPV_ARGS(&dxgi_factory_))
);
ThrowIfFailed(DWriteCreateFactory(
DWRITE_FACTORY_TYPE_SHARED,
__uuidof(IDWriteFactory),
reinterpret_cast<IUnknown**>(dwrite_factory_.GetAddressOf())
));
dwrite_factory_->GetSystemFontCollection(&dwrite_system_font_collection_);
}
GraphManager::~GraphManager()
{
}
std::shared_ptr<WindowRenderTarget> GraphManager::CreateWindowRenderTarget(HWND hwnd)
{
return std::make_shared<WindowRenderTarget>(this, hwnd);
}
Dpi GraphManager::GetDpi() const
{
Dpi dpi;
d2d1_factory_->GetDesktopDpi(&dpi.x, &dpi.y);
return dpi;
}
void GraphManager::ReloadSystemMetrics()
{
ThrowIfFailed(
d2d1_factory_->ReloadSystemMetrics()
);
}
}
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