www.pudn.com > bp_cpp.zip > bmp.h

#ifndef _PUBLIC_BMP_H 
#define _PUBLIC_BMP_H 
/* 
 * public/bmp.h 
 * 2004-01-12 by ShanLanshan 
 */ 
 
#ifdef __cplusplus 
	extern "C" { 
#endif 
 
namespace pub { 
 
#pragma pack(1) 
 
 
// 颜色纬度定义 
#define COLOR_DIVISION_RED		0 
#define COLOR_DIVISION_GREEN	1 
#define COLOR_DIVISION_BLUE		2 
 
// 定义bmp文件头结构 
class BmpFileHeader { 
public: 
	static const char *M_BMPFILE_FLAG; 
	static const int M_BMPFILE_FLAG_LEN = 2; 
	char m_flag[M_BMPFILE_FLAG_LEN];// 文件类型，必须为"BM" 
	unsigned long m_size;			// 整个文件的大小  
	unsigned long m_reserved;		// 保留，必须为０  
	unsigned long m_off;			// 从该结构到图像首部的偏移量 
public: 
	bool check_valid(); 
	BmpFileHeader(); 
	~BmpFileHeader(); 
}; 
 
class BmpInfoHeader { 
public: 
	unsigned long m_size;			// 本结构字节数	 
	long m_width;					// 位图宽度		 
	long m_height;					// 位图高度 
	short m_planes;					// 目标设备的位面数 
	short m_bitcount;				// 每个象素的位数 
	unsigned long m_compression;	// 压缩类型，必须为１ 
	unsigned long m_imagesize;		// 指定图像的大小 
	long m_perlspermeterx;			// 水平分辨率 
	long m_perlspermetery;			// 垂直分辨率 
	unsigned long m_color_used;		// 使用的颜色总数	 
	unsigned long m_color_important;// 指定对位图的显示有重要影响的颜色索引数 
									// 如果此值为 0，则所有颜色都很重要 
public: 
	BmpInfoHeader(int width = 64, int height = 64, short bitcout = 8); 
	~BmpInfoHeader(); 
	bool check_valid(); 
	void set_info(int width, int height, short bitcount); 
	int get_line_bytes(); 
}; 
 
class BmpPaletteSlot { 
public: 
	unsigned char m_red; 
	unsigned char m_green; 
	unsigned char m_blue; 
	unsigned char m_reserved; 
public: 
	BmpPaletteSlot(unsigned char r = 0, unsigned char g = 0, unsigned char b = 0); 
	~BmpPaletteSlot(); 
	void set_rgb(unsigned char r, unsigned char g, unsigned char b); 
}; 
 
class BmpPalette { 
public: 
	BmpPaletteSlot *m_palette_slot; 
	int m_slots; 
public: 
	void set_bit(int bit, const unsigned char *data = NULL); 
	unsigned int get_data_len(); 
	unsigned char *get_data(); 
	void clear(); 
	BmpPalette(); 
	~BmpPalette(); 
}; 
 
class Bitmap { 
public: 
	BmpFileHeader m_fileheader; 
	BmpInfoHeader m_infoheader; 
	BmpPalette m_palette; 
	char *m_data; 
	int m_line_bytes; 
	long & get_width() {return m_infoheader.m_width;}; 
	long & get_height() {return m_infoheader.m_height;}; 
	short & get_bitcount() {return m_infoheader.m_bitcount;}; 
	int get_color_division() {return get_bitcount() == 1 ? 1 : 3;}; 
	int get_division_len(int division) {return get_bitcount() == 1 ? 1 : 256;}; 
public: 
	Bitmap(); 
	~Bitmap(); 
	bool in_range(int x, int y) { 
		return (x >= 0 && y >= 0 && x < get_width() && y < get_height()); 
	}; 
 
	bool create(int w, int h, short bit); 
	bool load_from_file(const char *filename); 
	bool save_to_file(const char *filename); 
	unsigned long get_pixel(int x, int y); 
	unsigned long get_pixel(int x, int y, int ci);	//ci: color index 
	void set_pixel(int x, int y, unsigned long c); 
	// 高斯化 
	// 黑白化 
	// 线条化， 梯度提取 
	// 反色 
	// 左右对称 
	// 上下对程 
	// 左旋对称 
	// 右旋对称 
	// 子位图 
	// 克隆 
}; 
 
extern void get_rgb(unsigned long c, unsigned long *r, unsigned long *g, unsigned long *b); 
extern unsigned long gen_rgb(unsigned long r, unsigned long g, unsigned long b); 
 
#pragma pack() 
 
} // namespace pub 
 
#ifdef __cplusplus 
	} 
#endif 
 
#endif // !_PUBLIC_BMP_H