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DirectXHelper.h
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DirectXHelper.h
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#pragma once
#include <ppltasks.h> // For create_task
namespace DX
{
inline void ThrowIfFailed(HRESULT hr)
{
if (FAILED(hr))
{
// Set a breakpoint on this line to catch Win32 API errors.
throw Platform::Exception::CreateException(hr);
}
}
// Function that reads from a binary file asynchronously.
inline Concurrency::task<std::vector<byte>> ReadDataAsync(const std::wstring& filename)
{
using namespace Windows::Storage;
using namespace Concurrency;
auto folder = Windows::ApplicationModel::Package::Current->InstalledLocation;
return create_task(folder->GetFileAsync(Platform::StringReference(filename.c_str()))).then([] (StorageFile^ file)
{
return FileIO::ReadBufferAsync(file);
}).then([] (Streams::IBuffer^ fileBuffer) -> std::vector<byte>
{
std::vector<byte> returnBuffer;
returnBuffer.resize(fileBuffer->Length);
Streams::DataReader::FromBuffer(fileBuffer)->ReadBytes(Platform::ArrayReference<byte>(returnBuffer.data(), fileBuffer->Length));
return returnBuffer;
});
}
// Converts a length in device-independent pixels (DIPs) to a length in physical pixels.
inline float ConvertDipsToPixels(float dips, float dpi)
{
static const float dipsPerInch = 96.0f;
return floorf(dips * dpi / dipsPerInch + 0.5f); // Round to nearest integer.
}
// Assign a name to the object to aid with debugging.
#if defined(_DEBUG)
inline void SetName(ID3D12Object* pObject, LPCWSTR name)
{
pObject->SetName(name);
}
#else
inline void SetName(ID3D12Object*, LPCWSTR)
{
}
#endif
// Naming helper function for ComPtr<T>.
// Assigns the name of the variable as the name of the object.
#define NAME_D3D12_OBJECT(x) DX::SetName(x.Get(), L#x)
#if defined(_DEBUG)
// Check for SDK Layer support.
inline bool SdkLayersAvailable()
{
HRESULT hr = D3D11CreateDevice(
nullptr,
D3D_DRIVER_TYPE_NULL, // There is no need to create a real hardware device.
0,
D3D11_CREATE_DEVICE_DEBUG, // Check for the SDK layers.
nullptr, // Any feature level will do.
0,
D3D11_SDK_VERSION, // Always set this to D3D11_SDK_VERSION for Microsoft Store apps.
nullptr, // No need to keep the D3D device reference.
nullptr, // No need to know the feature level.
nullptr // No need to keep the D3D device context reference.
);
return SUCCEEDED(hr);
}
#endif
}