Path: chuka.playstation.co.uk!news
From: Craig Graham <c_graham@hinge.mistral.co.uk>
Newsgroups: scee.yaroze.programming.2d_graphics
Subject: Re: TIM conversion
Date: Thu, 07 May 1998 15:35:51 +0100
Organization: Intelligent Research
Lines: 233
Message-ID: <3551C6C7.6D8BF731@hinge.mistral.co.uk>
References: <3551B600.C6B737B7@clara.net>
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Ian Thompson wrote:

> Hi,
>
> Has anybody written anything for coverting BMP to TIM format. I wish to incoperate TIM convertion into a util I am writing for the PC. (Not using
> TIMUTIL.)
>
> Any help will be appreciated.
>
> Ian Thompson

Almost...this'll load BMP's or TIM's and save BMP's. Just add a save TIM method
- then mail me it back again ;)

Craig.




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Content-Type: text/plain; charset=us-ascii; name="ImageFile.cpp"
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#include "stdafx.h"

#include "ImageFile.h"

CImageFile::CImageFile()
{
  image=NULL;
}

CImageFile::~CImageFile()
{
  if(image)
    free(image);
}

BOOL CImageFile::LoadBMP(char *fn)
{
  FILE *f;
  BMP_Header hd;

  f=fopen(fn,"rb");
  if(f)
  {
    fseek(f,2,0);

    fread(&hd,sizeof(BMP_Header),1,f);

    w=hd.w; h=hd.h; bpp=hd.bpp;

    fread(palette,4,1<<bpp,f);

    fseek(f,hd.data_offset,0);

    if(image)
      free(image);

    image=(unsigned char*)malloc(w*h/(8/bpp));

    fread(image,1,w*h/(8/bpp),f);

    fclose(f);
    return TRUE;
  }
  return FALSE;
}

#define PSXCLUT2PCPAL(X)  ((((X)&31)<<16)|((((X>>5)&31)<<8)|(((X>>10)&31)))

BOOL CImageFile::LoadTIM(char *fn)
{
  FILE *f;
  TIM_Header hd;
  TIM_ImageHeader i;
  TIM_ClutHeader c;
  unsigned int mode;
  int bnum,ln,bn;
  unsigned short t,n;
  unsigned char tmp,r,g,b;
  int lineT,lineB;
  int bpl;

  f=fopen(fn,"rb");
  if(f)
  {
    fread(&hd,sizeof(TIM_Header),1,f);

    mode=hd.mode_flag&TIM_FLAG_MODE_MASK;
    switch(mode)
    {
      case TIM_FLAG_4BIT:
        bpp=4;
        break;
      
      case TIM_FLAG_8BIT:
        bpp=8;
        break;
    }

    if(hd.mode_flag&TIM_FLAG_CLUT)
    {
      fread(&c,sizeof(TIM_ClutHeader),1,f);
      bnum=c.bytes-sizeof(TIM_ClutHeader);
      n=0;
      while(bnum)
      {
        fread(&t,2,1,f);
        r=(t&31)<<3;
        g=((t>>5)&31)<<3;
        b=((t>>10)&31)<<3;

        palette[n++]=(r<<16)+(g<<8)+b;
        bnum-=2;
      }
    }

    fread(&i,sizeof(TIM_ImageHeader),1,f);
    bnum=i.bytes-sizeof(TIM_ImageHeader);
    if(bpp==8)
      w=i.w*2;
    if(bpp==4)
      w=i.w*4;
    h=i.h;
    if(image)
      free(image);

    image=(unsigned char*)malloc(bnum);
    fread(image,1,bnum,f);

    bpl=w*bpp/8;
    // Invert lines (BMP stores bitmaps upside down)
    for(ln=0; ln<h/2; ln++)
    {
      lineT=ln*bpl;
      lineB=(h-ln-1)*bpl;
      for(bn=0; bn<bpl; bn++)
      {
        tmp=image[lineT+bn];
        image[lineT+bn]=image[lineB+bn];
        image[lineB+bn]=tmp;
      }
    }

    fclose(f);
    return TRUE;
  }
  return FALSE;
}


BOOL CImageFile::SaveAsBMP(char *fn)
{
  FILE *f;
  BMP_Header hd;  

  f=fopen(fn,"wb");
  if(f)
  {
    hd.fsize=sizeof(BMP_Header)+w*h/(8/bpp);
    if(bpp==8)
    {
      hd.num_important_colours=hd.num_colours=256;
    }
    if(bpp==4)
    {
      hd.num_important_colours=hd.num_colours=16;
    }
    hd.fsize+=hd.num_colours*4;    

    hd.header_length=40;

    hd.w=w; hd.h=h;

    hd.bpp=bpp;
    hd.bitplanes=1;
    hd.compression_type=0;

    hd.data_offset=sizeof(BMP_Header)+2+hd.num_colours*4;

    fwrite("BM",1,2,f);
    fwrite(&hd,sizeof(BMP_Header),1,f);
    hd.num_colours=hd.num_important_colours=0;
    fwrite(palette,4,1<<bpp,f);
    fwrite(image,1,w*h/(8/bpp),f);

    fclose(f);
    return TRUE;
  }
  return FALSE;
}

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