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Open Source Computer Vision Library
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41 lines
1.4 KiB
41 lines
1.4 KiB
#pragma once |
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#include <wrl/client.h> |
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#include <ppl.h> |
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#include <ppltasks.h> |
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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<Platform::Array<byte>^> ReadDataAsync(Platform::String^ 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(filename)).then([] (StorageFile^ file) |
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{ |
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return file->OpenReadAsync(); |
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}).then([] (Streams::IRandomAccessStreamWithContentType^ stream) |
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{ |
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unsigned int bufferSize = static_cast<unsigned int>(stream->Size); |
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auto fileBuffer = ref new Streams::Buffer(bufferSize); |
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return stream->ReadAsync(fileBuffer, bufferSize, Streams::InputStreamOptions::None); |
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}).then([] (Streams::IBuffer^ fileBuffer) -> Platform::Array<byte>^ |
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{ |
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auto fileData = ref new Platform::Array<byte>(fileBuffer->Length); |
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Streams::DataReader::FromBuffer(fileBuffer)->ReadBytes(fileData); |
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return fileData; |
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}); |
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} |
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} |