resizer.h

<VC++视频音频开发>一书的光盘资料。

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#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