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D3D12: Preliminary UWP support 

Seems to be working on a developer desktop at least.

Apps are expected to force the backend via the recently introduced
QQuickWindow::setSceneGraphBackend() function.

Change-Id: Ib7096ace199622a97f55dd530ea59f9e3f6eca87
Reviewed-by: Andy Nichols <andy.nichols@qt.io>
This commit is contained in:
Laszlo Agocs 2016-05-23 21:41:12 +02:00
parent 91e1a65cdb
commit c6ab7f8dcf
1 changed files with 51 additions and 2 deletions
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53
src/plugins/scenegraph/d3d12/qsgd3d12engine.cpp
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@ -53,6 +53,13 @@
#include "cs_tdr.hlslh"
#endif
#ifdef Q_OS_WINRT
#include <QtCore/private/qeventdispatcher_winrt_p.h>
#include <functional>
#include <windows.ui.xaml.h>
#include <windows.ui.xaml.media.dxinterop.h>
#endif
QT_BEGIN_NAMESPACE
// NOTE: Avoid categorized logging. It is slow.
@ -689,8 +696,6 @@ void QSGD3D12EnginePrivate::initialize(WId w, const QSize &size, float dpr, int
windowDpr = dpr;
windowSamples = qMax(1, surfaceFormatSamples); // may be -1 or 0, whereas windowSamples is uint and >= 1
HWND hwnd = reinterpret_cast<HWND>(w);
swapChainBufferCount = qMin(qEnvironmentVariableIntValue("QT_D3D_BUFFER_COUNT"), MAX_SWAP_CHAIN_BUFFER_COUNT);
if (swapChainBufferCount < 2)
swapChainBufferCount = DEFAULT_SWAP_CHAIN_BUFFER_COUNT;
@ -734,6 +739,9 @@ void QSGD3D12EnginePrivate::initialize(WId w, const QSize &size, float dpr, int
return;
}
#ifndef Q_OS_WINRT
HWND hwnd = reinterpret_cast<HWND>(w);
DXGI_SWAP_CHAIN_DESC swapChainDesc = {};
swapChainDesc.BufferCount = swapChainBufferCount;
swapChainDesc.BufferDesc.Width = windowSize.width() * windowDpr;
@ -759,6 +767,47 @@ void QSGD3D12EnginePrivate::initialize(WId w, const QSize &size, float dpr, int
}
dev->dxgi()->MakeWindowAssociation(hwnd, DXGI_MWA_NO_ALT_ENTER);
#else
DXGI_SWAP_CHAIN_DESC1 swapChainDesc = {};
swapChainDesc.Width = windowSize.width() * windowDpr;
swapChainDesc.Height = windowSize.height() * windowDpr;
swapChainDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
swapChainDesc.SampleDesc.Count = 1;
swapChainDesc.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
swapChainDesc.BufferCount = swapChainBufferCount;
swapChainDesc.Scaling = DXGI_SCALING_STRETCH;
swapChainDesc.SwapEffect = DXGI_SWAP_EFFECT_FLIP_DISCARD;
swapChainDesc.AlphaMode = DXGI_ALPHA_MODE_PREMULTIPLIED;
if (waitableSwapChainMaxLatency)
swapChainDesc.Flags = DXGI_SWAP_CHAIN_FLAG_FRAME_LATENCY_WAITABLE_OBJECT;
ComPtr<IDXGISwapChain1> baseSwapChain;
HRESULT hr = dev->dxgi()->CreateSwapChainForComposition(commandQueue.Get(), &swapChainDesc, nullptr, &baseSwapChain);
if (FAILED(hr)) {
qWarning("Failed to create swap chain for composition: 0x%x", hr);
return;
}
if (FAILED(baseSwapChain.As(&swapChain))) {
qWarning("Failed to case swap chain");
return;
}
// The winrt platform plugin returns an ISwapChainPanel* from winId().
ComPtr<ABI::Windows::UI::Xaml::Controls::ISwapChainPanel> swapChainPanel
= reinterpret_cast<ABI::Windows::UI::Xaml::Controls::ISwapChainPanel *>(window);
ComPtr<ISwapChainPanelNative> swapChainPanelNative;
if (FAILED(swapChainPanel.As(&swapChainPanelNative))) {
qWarning("Failed to cast swap chain panel to native");
return;
}
hr = QEventDispatcherWinRT::runOnXamlThread([this, &swapChainPanelNative]() {
return swapChainPanelNative->SetSwapChain(swapChain.Get());
});
if (FAILED(hr)) {
qWarning("Failed to set swap chain on panel: 0x%x", hr);
return;
}
#endif
if (waitableSwapChainMaxLatency) {
if (FAILED(swapChain->SetMaximumFrameLatency(waitableSwapChainMaxLatency)))