lyfz_repos/经典版源码/lyfzInternalUpgrade/lyfzUpgrade/ImageCompress.h

#ifndef __IMAGECOMPRESS_HEADER__
#define __IMAGECOMPRESS_HEADER__

#pragma once

#include <gdiplus.h>
using namespace Gdiplus;
#pragma comment(lib, "gdiplus.lib")

class ImageCompress
{
public:
	ImageCompress(void);
	~ImageCompress(void);

	// 必须在CWinApp(CWinAppEx)派生类的InitInstance()函数中调用;
	inline static void InitGdiplusAtApp(){
		GdiplusStartupInput gdiplusStartupInput;
		GdiplusStartup(&m_gdiplusToken, &gdiplusStartupInput, NULL);
	}

	inline static void ShutdownGdiplus(){
		Gdiplus::GdiplusShutdown(m_gdiplusToken);
	}

	static BOOL ToCompressImage(IN const TCHAR *pImageSource, IN const TCHAR *pImageDest, IN const int &nXPiexel, IN const int &nYPiexel);

private:
	static ULONG_PTR m_gdiplusToken;
	// format格式化方式;
	// pClsid返回的格式化类厂ID;
	static int GetEncoderClsid(IN const WCHAR* format, OUT CLSID* pClsid);

	void SaveImageToFile(IN Image *img, IN CString &path, IN ULONG quality = 100);

	// 以下两函数可以整合成一函数;
	static void ScaleZoombySpecificWidth(IN const int &nWidth, IN const int &nHeight, IN OUT CRect &rc);
	static void ScaleZoombySpecificHeight(IN const int &nWidth, IN const int &nHeight, IN OUT CRect &rc);

};

#endif