mirror of
https://github.com/opencv/opencv.git
synced 2024-12-13 16:09:23 +08:00
41 lines
1.2 KiB
C++
41 lines
1.2 KiB
C++
#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;
|
|
});
|
|
}
|
|
} |