PC World 2002 September/PCWorld_2002-09_cd.bin/Software/Vyzkuste/helpdeco/ZAPRES.C

C/C++ Source or Header | 1996-09-13 | 5KB | 177 lines

/*
ZAPRES - removes resolution information from Windows bitmap files - Version 1.1
M.Winterhoff, Geschw.-Scholl-Ring 17, 38444 Wolfsburg, Germany, CIS 100326,2776

usage:    ZAPRES filename1[.BMP] filename2[.BMP] ...

option: Normally ZAPRES will create a .BAK file before it attempts to modify
    the input file. Specify option /b if you don't want to backup files.

This program removes the resolution information from Windows .BMP bitmaps, .MRB
multi resolution bitmaps, and .SHG segmented hotspot graphics. This way WinHelp
will not rescale the image and MRBC can be applied to specify a new resolution.

This program is freeware. Use at your own risk. No part of it may be used
commercially. No fees may be charged on distributing.
*/

#include <stdio.h>
#include <stdlib.h>
#include <dir.h>
#include <string.h>

int backup(FILE *f,char *oldname)
{
    char drive[_MAX_DRIVE],dir[_MAX_DIR],fname[_MAX_FNAME],ext[_MAX_EXT];
    char path[_MAX_PATH];
    char buffer[512];
    long pos,size;
    size_t bytes;
    FILE *bak;
    int result=0;

    _splitpath(oldname,drive,dir,fname,ext);
    _makepath(path,drive,dir,fname,".BAK");
    bak=fopen(path,"wb");
    if(bak)
    {
    result=1;
        pos=ftell(f);
        fseek(f,0L,SEEK_END);
        size=ftell(f);
        fseek(f,0L,SEEK_SET);
    while(size)
    {
         bytes=size>sizeof(buffer)?sizeof(buffer):size;
         if(fread(buffer,1,bytes,f)!=bytes)
         {
         fprintf(stderr,"Can not read from %s\n",oldname);
         result=0;
         break;
         }
         if(fwrite(buffer,1,bytes,bak)!=bytes)
         {
         fprintf(stderr,"Can not write to %s\n",path);
         result=0;
         break;
         }
         size-=bytes;
    }
    fclose(bak);
        fseek(f,pos,SEEK_SET);
    }
    else
    {
    fprintf(stderr,"Can not create %s\n",path);
    }
    return result;
}

int main(int argc,char *argv[])
{
    FILE *f;
    int b,n,i,k,bb;
    long w,h,zero,pos;
    char drive[_MAX_DRIVE],dir[_MAX_DIR],fname[_MAX_FNAME],ext[_MAX_EXT];
    char path[_MAX_PATH];

    for(b=i=1;i<argc;i++)
    {
    if(stricmp(argv[i],"/b")!=0&&stricmp(argv[i],"-b")!=0)
    {
        argv[b++]=argv[i];
    }
    }
    if(b<2)
    {
    printf("ZAPRES - removes resolution information from Windows bitmap files - Version 1.1\n"
           "M.Winterhoff, Geschw.-Scholl-Ring 17, 38444 Wolfsburg, Germany, CIS 100326,2776\n"
           "\n"
           "usage:    ZAPRES filename1[.BMP] filename2[.BMP] ...\n"
           "\n"
           "option: Normally ZAPRES will create a .BAK file before it attempts to modify\n"
           "    the input file. Specify option /b if you don't want to backup files.\n"
           "\n"
           "This program removes the resolution information from Windows .BMP bitmaps, .MRB\n"
           "multi resolution bitmaps, and .SHG segmented hotspot graphics. This way WinHelp\n"
           "will not rescale the image and MRBC can be applied to specify a new resolution.\n"
           "\n"
           "This program is freeware. Use at your own risk. No part of it may be used\n"
           "commercially. No fees may be charged on distributing.\n");
    }
    else for(i=1;i<b;i++)
    {
    _splitpath(argv[i],drive,dir,fname,ext);
    if(!ext[0]) strcpy(ext,".BMP");
    _makepath(path,drive,dir,fname,ext);
    f=fopen(path,"r+b");
    if(f)
    {
        n=getw(f);
        if(n==0x4D42)
        {
        fseek(f,38L,SEEK_SET);
        fread(&w,sizeof(long),1,f);
        fread(&h,sizeof(long),1,f);
        if(w==0&&h==0)
        {
            fprintf(stderr,"Resolution was already removed from %s\n",path);
        }
        else if(b<argc||backup(f,path))
        {
            fseek(f,38L,SEEK_SET);
            zero=0;
            fwrite(&zero,sizeof(long),1,f);
            fwrite(&zero,sizeof(long),1,f);
            fprintf(stderr,"Resolution %lux%lu (%ldx%ld dpi) removed from %s\n",w,h,(w*2)/79,(h*2)/79,path);
        }
        }
        else if(n==0x506C||n==0x706C)
        {
        n=getw(f); /* number of bitmaps */
                bb=0;
        for(k=0;k<n;k++)
        {
            fseek(f,4L+4*k,SEEK_SET);
            fread(&pos,sizeof(pos),1,f);
            fseek(f,pos,SEEK_SET);
            switch(getc(f)) /* picture type */
            {
            case 5: /* DDB */
            case 6: /* DIB */
            getc(f); /* packing method ignored */
            w=getw(f);
            if(w&1) w|=(long)getw(f)<<16;
            h=getw(f);
            if(h&1) h|=(long)getw(f)<<16;
            if(w/2==0&&h/2==0)
            {
                fprintf(stderr,"Resolution was already removed from bitmap %u of %s\n",k,path);
            }
            else if(b<argc||bb||backup(f,path))
            {
                fseek(f,pos+2,SEEK_SET);
                zero=w&1;
                fwrite(&zero,(w&1)+1,2,f);
                zero=h&1;
                fwrite(&zero,(h&1)+1,2,f);
                fprintf(stderr,"Resolution %lux%lu removed from bitmap %u of %s\n",w/2,h/2,k,path);
                            bb=1;
            }
            }
        }
        }
        else
        {
        fprintf(stderr,"%s is no valid Windows .BMP, .MRB, or .SHG file\n",path);
        }
        fclose(f);
    }
    else
    {
        fprintf(stderr,"Can not open %s\n",path);
    }
    }
    return 0;
}