init - 初始化项目

samples/wp8/OcvImageManipulation/PhoneXamlDirect3DApp1/PhoneXamlDirect3DApp1Comp/DirectXHelper.h

@@ -0,0 +1,41 @@
+#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;
+        });
+    }
+}