gned char ch;

int i,j,n;

FILE *fp;

fp=fopen(fname,rb+);

if (fp==NULL) return NULL;

fseek(fp,18L,SEEK-SET);

fread(&width,2,1,fp);fseek(fp,2L,SEEK-CUR);

fread(&depth,2,1,fp);fseek(fp,2L,SEEK-CUR);

n=width/4;

if (width%4 !=0) n++;

bytes=n*4;

fseek(fp,54L,SEEK-SET);

fread(&palette[0][0],4,256,fp);

return fp;

}

/*该函数实现颜色的压缩*/

void zh_fan-tu(FILE *fp,int color1,int color2)

{

unsigned char *p,*q,cc,ch;

long len;

int max-no, i,j,m,n,r0,b0,g0,r1,b1,g1;

double dd,dmin;

char s[4];

max-no=color2-color1+1;

for (i=0;i=width) break;

else {

ch=(unsigned char)*q;

TAB[ch]++;

}

}

for (i=0;i=color1;i--)

memcpy(&palette[0],&palette[i-color1][0],4);

for (i=0;idd) {dmin=dd;m=j;}

}

BB[TT]=(unsigned char)m;

}

for (i=0;i
   
     
     


转自： 仅仅学术交流与学习之用,非商业之目的.