多媒体编程

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Visual C++

Resizer.h：源码内容

							/**************************************************************************************
 *                                                                                    *
 *                                                                                    *
 **************************************************************************************/
#ifndef _RESIZER_H
#define _RESIZER_H
#include "Playa.h"
#include <windows.h>
/*
 * 屏幕高宽比的数据类型
 */
typedef struct aspect_ratio_factor_s {
	DWORD xFactor;
	DWORD yFactor;
} aspect_ratio_factors_t;
extern aspect_ratio_factors_t aspectRatios[];
class Resizer {
private:
	POINT lastPt;
	POINT startPt;
	
	DWORD originalWidth;
	DWORD originalHeight;
	void DrawFree(HWND hwnd, POINT *pt1);
	void DrawOriginal(HWND hwnd, POINT *pt1);
	void DrawTV(HWND hwnd, POINT *pt1);
	void DrawWide(HWND hwnd, POINT *pt1);
	void DrawCustom(HWND hwnd, POINT *pt1);
public:
	Resizer();
	~Resizer();
	void Start(POINT *pt, DWORD originalWidth, DWORD originalHeight);
	
	void   Draw(HWND hwnd, POINT *pt, aspect_ratio_t aspectRatio);
	POINT *GetLastPoint();
	void Stop();
};
#endif

						