axmol/cocos/2d/platform/winrt/CCWinRTUtils.cpp

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Copyright (c) Microsoft Open Technologies, Inc.

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#include "CCWinRTUtils.h"
#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN 1
#endif
#include <Windows.h>
#include <wrl/client.h>
#include <ppl.h>
#include <ppltasks.h>

NS_CC_BEGIN

using namespace Windows::Graphics::Display;
using namespace Windows::Storage;
using namespace concurrency;
using namespace Platform;
using namespace Windows::Storage;
using namespace Windows::Storage::Pickers;
using namespace Windows::Storage::Streams;

std::wstring CCUtf8ToUnicode(const char * pszUtf8Str, unsigned len/* = -1*/)
{
    std::wstring ret;
    do
    {
        if (! pszUtf8Str) break;
		// get UTF8 string length
		if (-1 == len)
		{
			len = strlen(pszUtf8Str);
		}
        if (len <= 0) break;

		// get UTF16 string length
		int wLen = MultiByteToWideChar(CP_UTF8, 0, pszUtf8Str, len, 0, 0);
		if (0 == wLen || 0xFFFD == wLen) break;
		
		// convert string  
        wchar_t * pwszStr = new wchar_t[wLen + 1];
        if (! pwszStr) break;
        pwszStr[wLen] = 0;
        MultiByteToWideChar(CP_UTF8, 0, pszUtf8Str, len, pwszStr, wLen + 1);
        ret = pwszStr;
        CC_SAFE_DELETE_ARRAY(pwszStr);
    } while (0);
    return ret;
}

std::string CCUnicodeToUtf8(const wchar_t* pwszStr)
{
	std::string ret;
	do
	{
		if(! pwszStr) break;
		size_t len = wcslen(pwszStr);
		if (len <= 0) break;
		
		size_t convertedChars = 0;
		char * pszUtf8Str = new char[len*3 + 1];
		WideCharToMultiByte(CP_UTF8, 0, pwszStr, len+1, pszUtf8Str, len*3 + 1, 0, 0);
		ret = pszUtf8Str;
		CC_SAFE_DELETE_ARRAY(pszUtf8Str);
	}while(0);

	return ret;
}

std::string PlatformStringToString(Platform::String^ s) {
	std::wstring t = std::wstring(s->Data());
	return std::string(t.begin(),t.end());
}

// Method to convert a length in device-independent pixels (DIPs) to a length in physical pixels.
float ConvertDipsToPixels(float dips)
{
   static const float dipsPerInch = 96.0f;
   return floor(dips * DisplayProperties::LogicalDpi / dipsPerInch + 0.5f); // Round to nearest integer.
}

float getScaledDPIValue(float v) {
	auto dipFactor = DisplayProperties::LogicalDpi / 96.0f;
	return v * dipFactor;
}

#if (CC_TARGET_PLATFORM == CC_PLATFORM_WP8)

// Function that reads from a binary file asynchronously.
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;
	});
}
#else



// Function that reads from a binary file asynchronously.
Concurrency::task<Platform::Array<byte>^> ReadDataAsync(Platform::String^ path)
{
	using namespace Windows::Storage;
	using namespace Concurrency;
		
	return create_task(StorageFile::GetFileFromPathAsync(path)).then([&](StorageFile^ f)
	{
		return FileIO::ReadBufferAsync(f);

	}).then([] (Streams::IBuffer^ fileBuffer) -> Platform::Array<byte>^ 
	{
		auto fileData = ref new Platform::Array<byte>(fileBuffer->Length);
		Streams::DataReader::FromBuffer(fileBuffer)->ReadBytes(fileData);
		return fileData;
	});
}



#endif


NS_CC_END