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