【c++】点阵字库提取汉字转位图

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <pshpack2.h>
#include <iostream>

#define size 32
#define sum (size*size/8)

void convert(unsigned char qh,unsigned char wh);
void Snapshot( BYTE * pData, int width, int height,  char * filename );

typedef long LONG;
typedef unsigned char BYTE;
typedef unsigned long DWORD;
typedef unsigned short WORD;

typedef struct {
WORD    bfType;
DWORD   bfSize;
WORD    bfReserved1;
WORD    bfReserved2;
DWORD   bfOffBits;
} BMPFILEHEADER_T;

struct BMPFILEHEADER_S{
WORD    bfType;
DWORD   bfSize;
WORD    bfReserved1;
WORD    bfReserved2;
DWORD   bfOffBits;
};

typedef struct{
DWORD      biSize;
LONG       biWidth;
LONG       biHeight;
WORD       biPlanes;
WORD       biBitCount;
DWORD      biCompression;
DWORD      biSizeImage;
LONG       biXPelsPerMeter;
LONG       biYPelsPerMeter;
DWORD      biClrUsed;
DWORD      biClrImportant;
} BMPINFOHEADER_T;

int main()
{
//提取某段汉字
for (unsigned char i=16;i<=16;i++)
{
for (unsigned char j=1;j<=3;j++)
{
convert(i,j);
}
}

//提取某个汉字
unsigned char incode[3] = "我";
unsigned char qh = incode[0] - 0xa0; //获得区码
unsigned char wh = incode[1] - 0xa0; //获得位码
convert(qh,wh);

return 0;
}

void convert(unsigned char qh,unsigned char wh)
{
unsigned long offset = 0;

unsigned char mat[sum][size/8] = {0} ; //mat[sum][2]

struct {
BYTE b;
BYTE g;
BYTE r;
} pRGB[size][size];  // 定义位图数据
memset( pRGB, 0, sizeof(pRGB) ); // 设置背景为黑色

char  hz[64];
FILE* HZK = NULL;

sprintf(hz , "HZK%d" , size);

HZK = fopen(hz , "rb");
offset = (94*(qh-1)+(wh-1))*sum; //得到偏移位置

if( HZK == NULL)
//fail to open file
{
printf("Can't Open hzk%d\n" , size);
getchar();
return ;
}
fseek(HZK, offset, SEEK_SET);
fread(mat, sum , 1, HZK);
fclose(HZK);
int col=0;
int row=0;
//显示
for(int i=0; i<size; i++) //16
{
for(int j=0; j<size/8; j++) //2
{
for(int k=0; k<8 ; k++) //8bits , 1 byte
{
if( mat[i][j] & (0x80>>k))
{//测试为1的位则显示
//汉字颜色
//printf("1");
pRGB[size-1-row][col-size*row].r = 0xff;//bmp中的行坐标倒序
pRGB[size-1-row][col-size*row].g = 0xff;
pRGB[size-1-row][col-size*row].b = 0xff;
}
else
{	//背景色
//printf("0");
pRGB[size-1-row][col-size*row].r = 0x00;//bmp中的行坐标倒序
pRGB[size-1-row][col-size*row].g = 0x00;
pRGB[size-1-row][col-size*row].b = 0x00;
}
col++;
}//for
}//for
//printf("\n");
row++;
}//for
char filename[9];
sprintf(filename,"%2d%2d.bmp",qh,wh);
if (wh<10)
filename[2]='0';
if (qh<10)
filename[0]='0';
Snapshot( ( BYTE*)pRGB, size, size, filename);
}

void Snapshot( BYTE * pData, int width, int height,  char * filename )
{
int bmpsize = width*height*3; // 每个像素点3个字节

// 位图第一部分，文件信息
BMPFILEHEADER_T bfh;
bfh.bfType = 0x4d42;  //bm
bfh.bfSize = bmpsize  // data size
+ sizeof( BMPFILEHEADER_T ) // first section size
+ sizeof( BMPINFOHEADER_T ) // second section size
;
bfh.bfReserved1 = 1; // reserved
bfh.bfReserved2 = 0; // reserved
bfh.bfOffBits = bfh.bfSize - bmpsize;
// 位图第二部分，数据信息
BMPINFOHEADER_T bih;
bih.biSize = sizeof(BMPINFOHEADER_T);
bih.biWidth = width;
bih.biHeight = height;
bih.biPlanes = 1;
bih.biBitCount = 24;
bih.biCompression = 0;
bih.biSizeImage = bmpsize;
bih.biXPelsPerMeter = 0;
bih.biYPelsPerMeter = 0;
bih.biClrUsed = 0;
bih.biClrImportant = 0;

FILE * fp = fopen(filename,"wb");
if( !fp ) return;

fwrite( &bfh, 1, sizeof(BMPFILEHEADER_T), fp );
fwrite( &bih, 1, sizeof(BMPINFOHEADER_T), fp );
fwrite( pData, 1, bmpsize, fp );
fclose( fp );
}