f4334277
 Hu Chunming
提交3rdparty
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#pragma once
#include <wrl/client.h>
#include <ppl.h>
#include <ppltasks.h>
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<Platform::Array<byte>^> ReadDataAsync(Platform::String^ filename)
{
using namespace Windows::Storage;
using namespace Concurrency;
auto folder = Windows::ApplicationModel::Package::Current->InstalledLocation;
return create_task(folder->GetFileAsync(filename)).then([] (StorageFile^ file)
{
return file->OpenReadAsync();
}).then([] (Streams::IRandomAccessStreamWithContentType^ stream)
{
unsigned int bufferSize = static_cast<unsigned int>(stream->Size);
auto fileBuffer = ref new Streams::Buffer(bufferSize);
return stream->ReadAsync(fileBuffer, bufferSize, Streams::InputStreamOptions::None);
}).then([] (Streams::IBuffer^ fileBuffer) -> Platform::Array<byte>^
{
auto fileData = ref new Platform::Array<byte>(fileBuffer->Length);
Streams::DataReader::FromBuffer(fileBuffer)->ReadBytes(fileData);
return fileData;
});
}
}
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